JP6443407B2 - Sheet manufacturing apparatus and sheet manufacturing method - Google Patents

Description

  The present invention relates to a sheet manufacturing apparatus and a sheet manufacturing method.

It has been practiced for a long time to deposit a fibrous substance and obtain a sheet-like or film-like molded body by applying a binding force between the deposited fibers. A typical example is the production of paper by paper making using water (paper making). Even now, the papermaking method is widely used as one of the methods for producing paper. Paper produced by a papermaking method generally has a structure in which cellulose fibers derived from, for example, wood are entangled with each other and partially bound by a binding force such as hydrogen bonding.

However, the paper making method is wet, and it is necessary to use a large amount of water. Further, after paper is formed, dehydration and drying are required, and energy and time spent therefor are very large. Furthermore, the used water needs to be properly treated as waste water. Also, the equipment used for the paper making method often requires large utilities such as water, electric power, and drainage facilities and infrastructure, and it is difficult to reduce the size.

Therefore, from the viewpoint of energy saving, environmental protection, etc., as a paper manufacturing method that replaces the papermaking method,
A method of using almost no water called a dry method is expected.
A paper recycling apparatus is disclosed in which a raw material paper is defibrated and deinked by a dry process, and a small amount of moisture is added to form the paper.

JP 2012-144819 A

The performance required for a sheet such as paper includes mechanical strength such as tensile strength and tear strength. In the technique described in Patent Document 1, it is considered that moisture added at the time of paper molding has a function of inducing a hydrogen bond derived from a hydroxyl group as a binding force between fibers constituting the paper. However, the bond strength of hydrogen bonds after becoming paper is reduced due to the presence of water. For this reason, in paper using hydrogen bonds as the binding force between fibers, mechanical strength may be insufficient or the shape may be deformed when placed in a high humidity environment or wet with water. Therefore, it is conceivable to bind a plurality of fibers via a resin. However, even when bound with resin, the mechanical strength may be insufficient. This was due to the small amount of water contained in the fibers when forming the sheet. One of the causes of the decrease in the amount of moisture contained in the fibers is that when paper is used as a raw material having a relatively small amount of moisture, moisture is lost when defibrating in a dry process. Another cause is that the moisture contained in the raw paper is originally low. This occurs when the installation environment of the manufacturing apparatus is low humidity, or the environment where the raw paper is placed is low humidity.

One of the objects according to some aspects of the present invention is to provide a sheet manufacturing apparatus and a sheet manufacturing method capable of manufacturing a sheet having good mechanical strength and water resistance by a dry method.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects or application examples.

One aspect of the sheet manufacturing apparatus according to the present invention is a defibrating unit for defibrating an object to be defibrated in the atmosphere;
A mixing unit that mixes a powdered additive containing a resin into a defibrated material that can be defibrated and hydrogen bonded,
A humidity control unit that adjusts the humidity of the mixture obtained by mixing the defibrated material and the additive, and the moisture content is 0.5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the mixture before conditioning. A humidity control section that adjusts the humidity to
A pressurizing unit that pressurizes the mixture conditioned by the humidity control unit without melting the mixture,
And a heating unit Ru is bound by heating the mixture pressurized by the pressurizing unit.
In the sheet manufacturing apparatus according to the present invention, the fibers in the defibrated material have an average total length of 1 μm to 10 mm, an average diameter of 1 μm to 1000 μm,
The particle size of the additive state, and are more 50μm or less 1 [mu] m,
The mixing unit may mix the defibrated material so that the ratio of the additive is 5% by mass or more and 70% by mass or less .

According to such a sheet manufacturing apparatus, by binding the fibers of the defibrated material with resin,
For example, even if the manufactured sheet is placed in a high humidity environment or wet with water, the resin maintains the binding between the defibrated material, so that the mechanical strength is maintained and the shape changes. Difficult to resist water. In addition, it has a humidity control part that adjusts the humidity of the mixture of the defibrated material and the additive, and creates a sheet using fibers with appropriate humidity. Can be manufactured.

In the sheet manufacturing apparatus according to the present invention, the sheet manufacturing apparatus may include a deposition unit that deposits the mixture after mixing by the mixing unit, and the humidity control unit adjusts the humidity of the mixture deposited by the deposition unit. Also good.

According to such a sheet manufacturing apparatus, the mixture can be conditioned in a state where the mixture is deposited. Thereby, the water | moisture content provided to a mixture by a humidity control part is a mixture (sediment).
Easy to supply to the whole. Therefore, the strength of the manufactured sheet can be further increased.

In the sheet manufacturing apparatus according to the present invention, the humidity adjusting unit may adjust the moisture content to 5 parts by mass or more and 12 parts by mass or less with respect to 100 parts by mass of the mixture before humidity adjustment.

According to such a sheet manufacturing apparatus, the amount of water added by the humidity control unit is more appropriate, and the mechanical strength of the manufactured sheet can be increased with a small amount of water used. Moreover, even when a high-humidity environment or a raw material containing a large amount of moisture is used, excessive moisture can be suppressed.

In the sheet manufacturing apparatus according to the present invention, the humidity control unit may adjust the humidity so that the moisture content of the mixture after conditioning is greater than the moisture content contained in the material to be defibrated.

According to such a sheet manufacturing apparatus, the moisture dissipated in the defibrating unit can be more fully compensated.

In the sheet manufacturing apparatus according to the present invention, the amount of moisture applied to the mixture by the humidity control unit is changed according to at least one of the moisture content of the material to be defibrated, the humidity of the environment, and the temperature. Also good.

According to such a sheet manufacturing apparatus, even if at least one of the moisture content of the material to be defibrated, the humidity of the environment, and the temperature changes, the mechanical strength and water resistance of the manufactured sheet are suppressed. can do. Thereby, a sheet | seat can be manufactured further stably.
In the sheet manufacturing apparatus according to the present invention, the mixing unit may supply the additive to the defibrated material flowing by an air flow.
In the sheet manufacturing apparatus according to the present invention, the heating unit includes a plurality of pairs of heating rollers each including a heating material, and heats the mixture while pressing the mixture between the pair of heating rollers of each group. Also good.

One aspect of the sheet manufacturing method according to the present invention includes a defibrating step of defibrating an object to be defibrated in the atmosphere,
A mixing step in which a powdered additive containing a resin is mixed in the atmosphere with a defibrated material that can be defibrated and hydrogen bonded;
It is a step of conditioning the mixture obtained by mixing the defibrated material and the additive, so that the moisture content is 0.5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the mixture before conditioning. Humidity control process to condition the humidity,
A pressurizing step of pressurizing the mixture conditioned by the humidity control step without melting the mixture;
A heating step of heating and binding the mixture pressed in the pressing step .

According to such a sheet manufacturing method, a sheet to which a binding force between fibers of the defibrated material is provided by binding with a resin can be manufactured. Even if the sheet manufactured by such a sheet manufacturing method is placed in a high-humidity environment or wet with water, for example, the binding between the defibrated material is maintained by the resin, so that the mechanical strength is maintained. In addition, it is less likely to change its shape and has good water resistance. In addition, humidity adjustment is performed on the mixture obtained in the mixing step of mixing the defibrated material and the additive, and a sheet is created using fibers with appropriate humidity. A good sheet can be produced.

The schematic diagram which shows the outline of the sheet manufacturing apparatus which concerns on embodiment. The schematic diagram which shows some examples of the cross section of the composite_body | complex which concerns on embodiment. The schematic diagram of the principal part of the sheet manufacturing apparatus which concerns on embodiment.

Several embodiments of the present invention will be described below. The embodiments described below illustrate examples of the present invention. The present invention is not limited to the following embodiments, and includes various modified embodiments that are implemented within a range that does not change the gist of the present invention. Note that not all of the configurations described below are essential configurations of the present invention.

1. Sheet Manufacturing Apparatus The sheet manufacturing apparatus 100 according to the present embodiment includes a defibrating unit 20, a mixing unit 30, and a humidity control unit 40.
And a heating unit 50. FIG. 1 is a schematic diagram schematically showing a sheet manufacturing apparatus 100 according to the present embodiment. Hereinafter, for the sheet manufacturing apparatus 100 of the present embodiment, the defibrating unit 20,
The mixing unit 30, the humidity control unit 40, and the heating unit 50 will be mainly described.

1.1. The defibrating unit The defibrating unit 20 defibrates the material to be defibrated. The defibrating unit 20 generates a defibrated material that has been unraveled into a fibrous shape by defibrating the material to be defibrated. The defibrating unit 20 also functions to separate particulate matter such as resin particles, ink, toner, and anti-bleeding agent attached to the defibrated material from the fiber when the defibrated material is waste paper or the like. It also has.

Here, the “defibrating treatment” refers to unraveling a material to be defibrated in which a plurality of fibers are bound into individual fibers. What has passed through the defibrating unit 20 is referred to as “defibrated material”. In addition to the unraveled fibers, the “defibrated material” includes resin particles separated from the fibers when unraveling the fibers (resin for binding multiple fibers), ink, toner, and anti-bleeding material. In some cases, the ink particles may be included. The shape of the unraveled defibrated material can be a string or flat string (
ribbon). The unraveled defibrated material may exist in an unentangled state (independent state) with other undisentangled fibers, or entangled with other undisentangled defibrated material to form a lump. It may exist in a state (a state forming a so-called “dama”).

Further, in this specification, in the sheet manufacturing apparatus, “upstream” with respect to the flow (including conceptual flow) of the material (raw material, defibrated material, defibrated material, web, etc.) of the sheet to be manufactured. "downstream"
Etc. are used. In addition, the expression “upstream (downstream)” is used to relatively specify the position of the configuration. For example, when “A is upstream (downstream) of B”, for example,
The position of A indicates that it is upstream (downstream) with respect to the position of B in the flow direction of the sheet material.

The defibrating unit 20 is provided on the upstream side of the mixing unit 30 described later. Defibration part 20 and mixing part 3
Another configuration may be provided between 0. Further, another configuration may be provided on the upstream side of the defibrating unit 20.

The defibrating unit 20 is optional as long as it has a function of defibrating an object to be defibrated. The defibrating unit 20
Defibration is performed dry in the atmosphere (in the air). In the illustrated example, the defibrated material introduced from the introduction port 21 is defibrated by the defibrating unit 20 to become a defibrated material (fiber), and the defibrated material discharged from the discharge port 22 is a tube 82, In this mode, the gas is supplied to the mixing unit 30 (the pipe 86 in the illustrated example) via the classification unit 63.

Moreover, in this specification, dry means not in liquid but in the atmosphere (in the air). The dry category includes a dry state and a state where a liquid (such as water) present as an impurity or a liquid (water or the like) intentionally added, water vapor, mist, or the like is present. In addition, it should be noted that the amount of water used for the entire apparatus or the amount of paper produced is completely different between the dry mode and the wet mode performed by papermaking. That is, in the dry mode, the amount of water when water is present in the system is orders of magnitude smaller than that of wet type.

The configuration of the defibrating unit 20 is not particularly limited. For example, the defibrating unit 20 includes a rotating unit (rotor) and a fixing unit that covers the rotating unit, and a gap (gap) is formed between the rotating unit and the fixing unit. be able to. When the defibrating unit 20 is configured in this way, the defibrating process is performed by introducing the material to be defibrated into the gap while the rotating unit is rotated. Further, in this case, the number of rotations, the shape of the rotating part, the shape of the fixed part, and the like can be appropriately designed according to the requirements of the properties of the sheet to be manufactured and the overall apparatus configuration. Further, in this case, the rotation speed of the rotating part (number of rotations per minute (rpm)) is the throughput of the defibrating process, the residence time of the defibrated material, the degree of defibrating, the size of the gap, the rotating part, It can be set appropriately in consideration of conditions such as the shape and size of the fixed part and other members.

It is more preferable that the defibrating unit 20 has a function of generating an air flow that sucks the material to be defibrated and / or discharges the defibrated material. In this case, the defibrating unit 20 sucks the material to be defibrated together with the airflow from the introduction port 21 by the airflow generated by itself, performs the defibrating process, and outputs the discharge port 22.
Can be transported to. The defibrated material discharged from the discharge port 22 is transferred to the pipe 82 in the example shown in FIG. In the case of using the defibrating unit 20 that does not have an airflow generation mechanism, a mechanism that generates an airflow that guides the material to be defibrated to the introduction port 21 and an airflow that sucks the defibrated material from the discharge port 22 is removed. There is no problem even if it is provided.

1.1.1. In the present specification, the defibrated material refers to an article containing the raw material of the sheet manufacturing apparatus 100, for example, pulp sheet, paper, waste paper, tissue paper, kitchen paper, cleaner, filter, liquid An absorbent material, a sound absorber, a buffer material, a mat, a cardboard, or the like, in which fibers are intertwined or bound. For defibrated materials, rayon, lyocell, cupra, vinylon, acrylic, nylon, aramid, polyester, polyethylene, polypropylene, polyurethane, polyimide, carbon, glass, metal fibers (organic fiber, inorganic fiber, organic fiber, etc.) Inorganic composite fibers) may be included. Moreover, the sheet manufacturing apparatus 1 of the present embodiment
In 00, when a classification unit 63 to be described later is provided, it is possible to effectively use waste paper as the defibrated material.

1.1.2. Defibrated material In the sheet manufacturing apparatus 100 of the present embodiment, the defibrated material used as a part of the material of the sheet to be produced is not particularly limited, and a wide range of defibrated material can be used as long as the sheet can be formed. Can do. The defibrated material includes fibers obtained by defibrating the above-described material to be defibrated, and as such fibers, natural fibers (animal fibers, plant fibers), chemical fibers (organic fibers, inorganic fibers, organic-inorganic composite fibers) ) And the like. More specifically, the fibers contained in the defibrated material include fibers made of cellulose, silk, wool, cotton, cannabis, kenaf, flax, ramie, jute, manila, sisal, conifer, hardwood, etc. It may be used alone, may be used by mixing as appropriate, or may be used as a regenerated fiber subjected to purification. The defibrated material is a material for the sheet to be produced, but it is sufficient that it contains at least one of these fibers. In addition, defibrated material (fiber)
May be dried, or may be contained or impregnated with a liquid such as water or an organic solvent.
Furthermore, the defibrated material (fiber) may be subjected to various surface treatments.

When the fiber contained in the defibrated material used in the present embodiment is an independent fiber,
The average diameter (when the cross section is not a circle, the maximum diameter among the lengths in the direction perpendicular to the longitudinal direction, or the diameter of the circle when assuming a circle having an area equal to the area of the cross section ( The equivalent circle diameter)) is 1 μm or more and 1000 μm or less, preferably 2 μm or more and 500 μm or less, more preferably 3 μm or more and 200 μm or less.

Although the length of the fiber contained in the defibrated material used in the present embodiment is not particularly limited, the length along the longitudinal direction of the fiber as an independent single fiber (the defibrated defibrated material) The length in the longitudinal direction of the product (fiber), hereinafter also referred to as “fiber length”) is, for example, 1 μm or more and 10 mm or less, preferably 1 μm or more and 8 mm or less, more preferably 1 μm or more and 5 mm or less, and further preferably 2 μm or more. It is 3 mm or less, more preferably 3 μm or more and 2 mm or less. When the length of the fiber is short, it is difficult to bind to the additive (composite), and the strength of the sheet may be insufficient. However, a sheet having sufficient strength can be obtained within the above range. The length along the longitudinal direction of the fiber means that both ends of one independent fiber are pulled as necessary so as not to break,
It may be the distance between both ends (the length of the fiber) when placed in a substantially linear state in that state. The average length of the fibers is 20 μm or more and 3600 as a length-length weighted average fiber length.
It is not more than μm, preferably not less than 200 μm and not more than 2700 μm, more preferably not less than 300 μm and not more than 2300 μm. Furthermore, the length of the fiber may have variation (distribution).

In this specification, when referring to a fiber, it may refer to a single fiber and may refer to an aggregate of a plurality of fibers (for example, a state like cotton), and when referred to as a defibrated material,
It refers to a material containing a plurality of fibers, and includes the meaning of a collection of fibers and the meaning of a material (powder or cotton-like object) that is a raw material of a sheet.

1.2. Mixing Unit The mixing unit 30 provided in the sheet manufacturing apparatus 100 of the present embodiment has a function of mixing (mixing) the defibrated material and the additive containing the resin in the air. In the mixing unit 30, at least the defibrated material and the additive are mixed. In the mixing part 30, components other than the defibrated material and the additive may be mixed. In the present specification, “mixing the defibrated material and the additive” means that the additive is positioned between the fibers contained in the defibrated material within a space (system) having a constant volume. To do.

As long as the mixing part 30 can mix a defibrated material (fiber) and an additive, the structure, structure, mechanism, etc. will not be specifically limited. Moreover, the mode of the mixing process in the mixing unit 30 is as follows.
Even batch processing (batch processing) may be either sequential processing or continuous processing. The mixing unit 30 may be operated manually or automatically. Furthermore, the mixing unit 30
Although at least the defibrated material and the additive are mixed, an embodiment in which other components can be mixed may be used.

The mixing unit 30 is provided on the downstream side of the defibrating unit 20 described above. The mixing unit 30 is provided on the upstream side of the heating unit 50 described later. Between the mixing unit 30 and the heating unit 50, a configuration may be included in addition to the humidity control unit 40 described later. Such other configurations include a loosening portion 70 for loosening the mixture of the defibrated material and the additive, a depositing portion 75 for forming the mixture into a web shape, and applying pressure to the mixture deposited in the web shape. The pressure part 60 (all are mentioned later) etc. are mentioned, Furthermore, it is not limited to these. Incidentally, mixture engaged mixed by the mixing unit 30, for but it may also be further mixed together by other configurations such as loosening portion 70 can be loosened portion 70 viewed as a mixing unit.

Examples of the mixing process in the mixing unit 30 include mechanical mixing and hydrodynamic mixing. For mechanical mixing, the fiber (defibrated material) and additives are introduced into, for example, a Henschel mixer and stirred, or the bag (fiber defibrated material) and additives are enclosed in a bag. The method of shaking is mentioned. Also, as a hydrodynamic mixing process,
A method of introducing fibers (defibrated material) and additives into an air stream such as the atmosphere and diffusing each other in the air stream can be used. In the method of introducing fibers (defibrated material) and additives into the airflow such as the atmosphere, the additives may be introduced into a pipe or the like in which the fibers of the defibrated material are flowing (transferred) by the airflow, Fibers (defibrated material) may be introduced into a tube or the like in which additive particles are flowed (transferred) by an air flow. In the case of such a method, it is more preferable that the airflow in the pipe or the like is turbulent because mixing efficiency may be improved.

The mixing unit 30 may include a feeder that introduces the additive into the flow path of the defibrated material. As shown in FIG. 1, when the pipe 86 is used as the mixing unit 30 for transferring the defibrated material, the additive is supplied to the additive in a state where the defibrated material is flowed by an air flow such as the atmosphere. The method introduced by 88 can be taken. Examples of the airflow generating means in the case where the pipe 86 is employed in the mixing unit 30 include a blower (not shown), and any appropriate airflow generating means can be used as long as the above functions are obtained.

The introduction of the additive (including the case of a composite) when the pipe 86 is employed in the mixing unit 30 can be performed by opening / closing the valve or by the operator's hand. FIG.
Can be performed using a screw feeder as shown in FIG. Use of these feeders is more preferable because fluctuations in the content (addition amount) of the additive in the airflow direction can be reduced. The same applies to the case where the additive is transferred by an air stream and the defibrated material is introduced into the air stream. In the example shown, the additive is
An additive supply unit 88 supplies the pipe 86 through a supply port 87 provided in the pipe 86. Therefore, in the illustrated example, the mixing unit 30 includes a part of the pipe 86, the additive supply unit 88, and the supply port 87.
It is constituted by.

In the sheet manufacturing apparatus 100 of the present embodiment, the mixing unit 30 is a dry type. here,
“Dry” in mixing refers to a state of mixing in the atmosphere (in the air), not in the liquid.
In the mixing unit 30, when the liquid is intentionally added to such an extent that the action of mixing is not hindered,
In a later step, it is preferable to add such an amount that energy and time for removing the liquid by heating or the like do not become too large.

The processing capacity of the mixing unit 30 is not particularly limited as long as the defibrated material and the additive can be mixed, and can be appropriately designed and adjusted according to the manufacturing capacity (throughput) of the sheet manufacturing apparatus 100. Adjustment of the processing capacity of the mixing unit 30 can be performed by changing the size of the processing container, the charged amount, etc., as long as it is a batch processing mode. When the material supply unit 88 is employed, it can be performed by changing the flow rate of the gas for transferring the defibrated material and the additive in the tube 86, the amount of material introduced, the amount transferred, and the like. In addition, also when employ | adopting the pipe 86 and the additive supply part 88 as shown in figure as the mixing part 30, a defibrated material and an additive can fully be mixed.

The additive supplied from the additive supply unit 88 includes a resin for binding a plurality of fibers. When the additive is supplied to the pipe 86, the plurality of fibers included in the defibrated material are not intentionally bound to each other unless the defibrating is insufficient. The resin contained in the additive melts or softens when passing through the heating unit 50 described later, and then binds the plurality of fibers by curing. In addition, when passing the heating part 50, the water | moisture content supplied by the humidity control part 40 is removed, and a some fiber will be bound also by a hydrogen bond.

1.2.1. Additive The additive supplied from the additive supply unit 88 includes a resin. The type of the resin may be either a natural resin or a synthetic resin, and may be either a thermoplastic resin or a thermosetting resin. In the sheet manufacturing apparatus 100 of the present embodiment, the resin is preferably solid at room temperature,
In view of binding the fibers by heat in the heating unit 50, a thermoplastic resin is more preferable.

Examples of natural resins include rosin, dammar, mastic, copal, phlegm, shellac, phlebotomy, sandalac, colophonium, etc., and those that are used alone or appropriately mixed, and these are chemically modified as appropriate. May be.

Among the synthetic resins, examples of the thermosetting resin include thermosetting resins such as phenol resin, epoxy resin, melamine resin, urea resin, unsaturated polyester resin, alkyd resin, polyurethane, and thermosetting polyimide resin.

Among the synthetic resins, thermoplastic resins include AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate, Examples include polyacetal, polyphenylene sulfide, polyether ether ketone, and the like.

These resins may be used alone or in combination. In addition, copolymerization and modification may be performed, and such resin systems include styrene resins, acrylic resins, styrene-acrylic copolymer resins, olefin resins, vinyl chloride resins, and polyester resins. resin,
Examples include polyamide resins, polyurethane resins, polyvinyl alcohol resins, vinyl ether resins, N-vinyl resins, styrene-butadiene resins, and the like.

The additive may be in the form of a fiber or powder. When the additive is fibrous, the fiber length of the additive is preferably equal to or less than the fiber length of the defibrated material. Specifically, the fiber length of the additive is 3 mm or less, more preferably 2 mm or less. If the fiber length of the additive is greater than 3 mm, it may be difficult to mix with the defibrated material with good uniformity. When the additive is in powder form, the particle size (diameter) of the additive is 1 μm or more and 50 μm or less, more preferably 2 μm or more and 20 μm or less. When the particle size of the additive is smaller than 1 μm, the binding force that binds the fibers in the defibrated material may decrease. If the particle size of the additive is larger than 20 μm, it may be difficult to mix with the defibrated material with good uniformity, and the adhesion to the defibrated material will be reduced and the defibrated material will be separated, producing In some cases, unevenness or the like may occur in the applied sheet.

The amount of the additive supplied from the additive supply unit 88 is appropriately set according to the type of sheet to be manufactured. The ratio of the additive to the defibrated material is, for example, 5% by mass or more and 70% by mass or less. From the viewpoint of obtaining a good mixture in the mixing unit 30, and dropping of the additive due to gravity when the mixture is formed into a web shape From a viewpoint of making it difficult to receive, 5 mass% or more and 50 mass% or less are preferable. In the example shown in the figure, the supplied additive is mixed with the defibrated material in the pipe 86 constituting the mixing unit 30.

The additive may contain other components in addition to the resin. Examples of other components include aggregation inhibitors, colorants, organic solvents, surfactants, antifungal agents / preservatives, antioxidants / ultraviolet absorbers, oxygen absorbers, and the like. Hereinafter, the aggregation inhibitor and the colorant will be described in detail.

1.2.1.1. Aggregation inhibitor The additive may include an aggregation inhibitor for suppressing aggregation of fibers in the defibrated material and aggregation of resins in the additive, in addition to the resin that binds the defibrated material. Moreover, when an aggregation inhibitor is included in the additive, it is preferable to integrate the resin and the aggregation inhibitor. That is, when the aggregation inhibitor is included in the additive, the additive is preferably a composite body integrally including the resin and the aggregation inhibitor.

In the present specification, the term “composite” refers to particles that are formed integrally with another resin as a component. Others refer to aggregation inhibitors, coloring materials, and the like, but also include those having shapes, sizes, materials, and functions different from those of the main resin.

When the aggregation inhibitor is blended with the additive, it is possible to make it difficult for the composites integrally including the resin and the aggregation inhibitor to aggregate together compared to the case where the aggregation inhibitor is not blended. Various aggregation inhibitors can be used, but in the sheet manufacturing apparatus 100 according to the present embodiment, water is not used or hardly used in the mixing unit 30, and thus is disposed on the surface of the composite (coating (coating), etc.) It is preferred to use seeds.

Examples of such an aggregation inhibitor include fine particles made of an inorganic substance. By disposing this on the surface of the composite, a very excellent aggregation inhibitory effect can be obtained. In addition, aggregation is
This refers to a state where objects of the same kind or different kinds exist physically in contact with each other by electrostatic force or van der Waals force. In addition, when an aggregate (for example, powder) of a plurality of objects is in a non-aggregated state, it does not necessarily mean that all of the objects constituting the aggregate are discretely arranged. That is, the state in which the aggregate is not included includes a state in which a part of the objects constituting the aggregate is aggregated, and the amount of such aggregated objects is 10% by mass of the entire aggregate.
Hereinafter, even if it is preferably about 5% by mass or less, this state is included in the “non-aggregated state” in the aggregate of a plurality of objects. Furthermore, when the powder is packed in a bag or the like, the particles of the powder are in contact with each other.
When the particles can be made into a discrete state by applying an external force that does not break the particles, such as free fall, it is included in the non-aggregated state.

Specific examples of the material for the aggregation inhibitor include silica, titanium oxide, aluminum oxide, zinc oxide, cerium oxide, magnesium oxide, zirconium oxide, strontium titanate, barium titanate, and calcium carbonate. A part of the material of the exemplified aggregation inhibitor (for example, titanium oxide) is the same as the material of the colorant, but the particle diameter of the aggregation inhibitor is different in that it is smaller than the particle diameter of the colorant. Therefore, the aggregation inhibitor does not greatly affect the color tone of the produced sheet and can be distinguished from the colorant. However, when adjusting the color tone of the sheet, even if the particle size of the aggregation inhibitor is small, some effects such as light scattering may occur, so it is more preferable to consider such effects.

The average particle diameter (number average particle diameter) of the particles of the aggregation inhibitor is not particularly limited, but is preferably 0.001 to 1 μm, and more preferably 0.008 to 0.6 μm. Aggregation inhibitor particles fall into the category of so-called nanoparticles, and are generally primary particles because of their small particle size. However, the particles of the aggregation inhibitor may be higher-order particles by combining a plurality of primary particles. If the particle diameter of the primary particles of the aggregation inhibitor is within the above range, the surface of the resin can be satisfactorily coated, and a sufficient aggregation suppression effect of the composite can be imparted. In the composite powder in which the aggregation inhibitor is arranged on the surface of the resin particles, the aggregation inhibitor is present between a certain complex and another complex, and the aggregation of each other is suppressed. In addition, when the resin and the aggregation inhibitor are not integrated but separate, the aggregation inhibitor between the resin particles and other resin particles does not always exist. Is considered to be smaller than when integrated.

The content of the aggregation inhibitor in the composite body in which the resin and the aggregation inhibitor are integrated is preferably 0.1 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the resin. If such content,
The above effects can be obtained. Further, from the viewpoint of enhancing the above effect and / or suppressing the aggregation inhibitor from dropping off from the produced sheet, the content is preferably 0.2 parts by mass or more with respect to 100 parts by mass of the resin. 4 parts by mass or less, more preferably 0.5 parts by mass or more and 3 parts by mass or less.

When the aggregation inhibitor is disposed on the surface of the resin, the ratio of the aggregation inhibitor to be coated on the surface of the composite (area ratio: sometimes referred to as a coverage in this specification) is 20% or more and 100%.
If it is as follows, a sufficient aggregation suppressing effect can be obtained. The coverage can be adjusted by charging into an apparatus such as an FM mixer. Furthermore, if the specific surface area of the aggregation inhibitor and the resin is known, it can be adjusted by the mass (weight) of each component at the time of preparation. Moreover, a coverage can also be measured with various electron microscopes. In addition, in the composite_body | complex in which the aggregation inhibitor is arrange | positioned in the aspect which does not fall easily from resin, it can be said that an aggregation inhibitor and resin are integral.

When an aggregation inhibitor is blended in the composite, it is possible to make it difficult for the composite to aggregate. Therefore, the additive (composite) and the defibrated material can be more easily mixed in the mixing unit 30. it can. That is, when the aggregation inhibitor is blended with the additive as a complex with the resin, the complex quickly diffuses into the space, and compared with the case where the aggregation inhibitor is not blended, the uniform defibrated material is faster. Mixtures with additives can be formed.

The reason why the composite and defibrated material can be satisfactorily mixed with the air flow or by stirring with a mixer is that the aggregation inhibitor can be used when the aggregation inhibitor is placed on the surface of the composite. There is a tendency to be easily tinged, and aggregation of the complex is suppressed by the static electricity. Further, according to the study by the inventors, it is found that the composite adhered to the fiber due to the static electricity is likely not to be easily detached from the fiber even when a mechanical impact or the like occurs. I came. From these tendencies, when a coagulation inhibitor is added to the additive as a composite, it is considered that the composite does not easily detach once attached to the fiber. It is considered that mixing is performed quickly without using any special means other than mixing. Further, the defibrated material (fibers) and the composite are mixed by the action of the mixing unit 30, and after the mixture is formed, the adhesion of the composite to the fibers is stable, and the detachment phenomenon of the composite is observed. I know I can't.

1.2.1.2. The colorant additive may contain a colorant in addition to the resin that binds the fibers of the defibrated material. Moreover, when a colorant is included in the additive, the resin and the colorant are preferably integrated. That is, the additive is preferably a composite that integrally includes a resin and a colorant. Further, even when the composite includes the above-described aggregation inhibitor, it can be a composite that integrally includes the resin, the colorant, and the aggregation inhibitor. That is, the additive may include a composite that integrally includes a resin, an aggregation inhibitor, and a colorant.

The composite having the resin and the colorant integrally refers to a state in which the colorant is unlikely to fall apart (or easily fall off) in the sheet manufacturing apparatus 100 and / or the manufactured sheet. That is, the composite having the resin and the colorant integrally includes the state in which the colorant is adhered to the resin, the state in which the colorant is structurally (mechanically) fixed to the resin, the resin and the colorant, Are in a state where they are agglomerated due to electrostatic force, van der Waals force or the like, and in a state where the resin and the colorant are chemically bonded. The state in which the composite has the resin and the colorant integrally may be a state in which the colorant is encapsulated in the resin or a state in which the colorant is attached to the resin, and a state in which the two states exist simultaneously. including.

FIG. 2 schematically shows several aspects of the cross section of the composite body integrally including the resin and the coloring material. As an example of a specific embodiment of the composite body integrally including the resin and the colorant, one or more colorants 2 are dispersed inside the resin 1 as shown in FIGS. 2 (a) to 2 (c). And a composite 3 having one or more coloring materials 2 attached to the surface of the resin 1 as shown in FIG. 2 (d). In the sheet manufacturing apparatus 100 of the present embodiment, a set (powder) of such a composite 3 can be used as the composite.

FIG. 2A shows an example of the composite 3 having a structure in which a plurality of coloring materials 2 (depicted as particles) are dispersed in the resin 1 constituting the composite 3. Such a composite 3 has a so-called sea-island structure in which the resin 1 is used as a matrix and the colorant 2 is dispersed as a domain. In this example, since the colorant 2 is surrounded by the resin 1, it is difficult for the colorant 2 to pass out of the resin 1 through the resin portion (matrix). For this reason, the colorant 2 is unlikely to fall off from the resin portion when it is subjected to various treatments in the sheet manufacturing apparatus 100 or formed into a sheet. In this case, the dispersion state of the coloring material 2 in the composite 3 may be such that the coloring materials 2 may be in contact with each other or the resin 1 may be present between the coloring materials 2. In FIG. 2A, the coloring material 2 is dispersed as a whole, but may be biased to one side. For example, in the figure, the coloring material 2 may be present only on the right side or the left side. As what is biased to one side, the coloring material 2 may be arranged in the central portion of the resin 1 as shown in FIG.
As shown in FIG. 2C, the coloring material 2 may be disposed in a portion close to the surface of the resin 1. The resin 1 may have a mother particle 4 near the center and a shell 5 around it. Here, the base particles 4 and the shell 5 may be the same type of resin or different types of resins.

The example shown in FIG. 2 (d) is a composite 3 having an aspect in which the coloring material 2 is embedded in the vicinity of the surface of the particles made of the resin 1. In this example, the colorant 2 is exposed on the surface of the composite 3, but the resin 1
It is difficult to fall off from the composite 3 by adhesion (chemical or physical bonding) or mechanical fixation with the resin 1, and such a composite 3 is also integrated with the resin 1 and the coloring material 2. Can be suitably used for the sheet manufacturing apparatus 100 of the present embodiment.
In this example, the colorant 2 may be present not only on the surface of the resin 1 but also inside.

Although several aspects of the composite body which has resin and a coloring material integrally were illustrated, the sheet manufacturing apparatus 1
As long as the colorant is not easily removed from the resin when it is subjected to various treatments within 00 or molded into a sheet, the colorant is not limited to these aspects. Even if it is in a state of being adhered by van der Waals force, it is only necessary that the coloring material is difficult to drop off from the resin particles. Moreover, even if it is the aspect which combined the several aspect illustrated above mutually,
Any colorant can be used as long as it is difficult to fall off the composite.

In addition, the preferable arrangement in the composite of the aggregation inhibitor described in the section “1.2.1.1. Aggregation inhibitor” is conceptually the same as the embodiment illustrated in FIG. However, it should be noted that the aggregation inhibitor has a particle size smaller than that of the coloring material 2. Moreover, even if it is a case where a coloring material is integrated in any aspect of Fig.2 (a)-(d), what has arrange | positioned the aggregation inhibitor on the surface can be formed.

The coloring material has a function of setting a predetermined color of the sheet manufactured by the sheet manufacturing apparatus 100 of the present embodiment. As the colorant, a dye or a pigment can be used, and it is preferable to use a pigment from the viewpoint of obtaining better hiding power and color developability when the composite is integrated with a resin.

The color and type of the pigment are not particularly limited. For example, various colors (white, blue, red, yellow, cyan, magenta, yellow, black, special colors (pearl, metal, etc.) used in general inks. (Gloss) etc.) can be used. The pigment may be an inorganic pigment or an organic pigment. As the pigment, known pigments described in JP 2012-87309 A and JP 2004-250559 A can be used. In addition, white pigments such as zinc white, titanium oxide, antimony white, zinc sulfide, clay, silica, white carbon, talc, and alumina white may be used. These pigments may be used singly or may be used in combination as appropriate. In the case of using a white pigment, among those exemplified above, it is possible to use a pigment made of powder containing particles mainly composed of titanium oxide (pigment particles). From the viewpoint of easily increasing the whiteness of the sheet to be produced with a small blending amount, it is more preferable.

In the mixing unit 30, the above-described defibrated material and the additive are mixed, and the mixing ratio thereof can be appropriately adjusted depending on the strength, properties, use, and the like of the sheet to be manufactured. As an example, if the manufactured sheet is for office use such as copy paper, the ratio of the additive to the defibrated material is 5% by mass or more and 70% by mass or less, and the viewpoint of obtaining a good mixture in the mixing unit 30;
And from a viewpoint of making it difficult to receive the fall of the additive by gravity at the time of shape | molding a mixture in web shape, 5 to 50 mass% is preferable.

1.3. Humidity adjustment unit The humidity adjustment unit 40 provided in the sheet manufacturing apparatus 100 of the present embodiment has a function of adjusting the humidity of the mixture in which the defibrated material and the additive are mixed by the mixing unit 30 described above. Here, humidity control is
It refers to adjusting the quantitative ratio of the mixture and water by adding water and / or water vapor to the mixture. In addition, for example, when the humidity control unit 40 takes an aspect such as spraying, in addition to the aspect of adding water by spraying, the aspect of spraying an aqueous solution containing water as a solvent,
The mode which sprays the dispersion liquid which contains water as a dispersion medium is included. Furthermore, the addition of water in the humidity control includes an embodiment in which the water is added by steam.

The humidity control unit 40 imparts water to the mixture. And when the mixture adjusted in the heating part 50 mentioned later is heated, the hydrogen bond between the fibers of the sheet | seat S obtained by evaporating at least one part of the water provided by the humidity control part 40 is carried out. Induced efficiently.

If the humidity control part 40 can provide water with respect to a mixture, the structure, a structure, a mechanism, etc. will not be specifically limited. The processing mode of the humidity control unit 40 may be batch processing (batch processing), sequential processing, or continuous processing. Moreover, the humidity control part 40 may be operated manually or automatically. Specific configurations of the humidity control unit 40 include a configuration in which water is sprayed from a nozzle to a mixture, a configuration in which steam (water vapor) is sprayed, a configuration in which mist obtained by ultrasonic vibration or the like is applied, and the like. be able to.

The humidity control unit 40 is provided on the downstream side of the mixing unit 30 described above. The humidity control unit 40 is provided on the upstream side of the heating unit 50. Another configuration may be provided between the mixing unit 30 and the heating unit 50. Such other configurations include a loosening portion 70 for loosening the mixture of the defibrated material and the additive, a depositing portion 75 for forming the mixture into a web shape, and applying pressure to the mixture deposited in the web shape. Examples thereof include, but are not limited to, the pressure unit 60 (both will be described later). However, when the sheet manufacturing apparatus 100 includes the loosening unit 70, there is a possibility that the loosening action by the loosening unit 70 may be hindered by water.
It is preferable to be provided on the downstream side of zero. Moreover, when the sheet manufacturing apparatus 100 includes the accumulation unit 75 as in the illustrated example, the humidity control unit 40 provides the moisture of the accumulation unit 75 so as to apply moisture to the web W on which the mixture is accumulated. It may be arranged downstream. In this way,
Moisture imparted to the mixture by the humidity control unit 40 can be easily supplied to the entire mixture (sediment). Therefore, the strength of the manufactured sheet can be further increased.

In the illustrated example, the humidity control unit 40 is provided downstream of the deposition unit 75 and upstream of the pressurization unit 60, but may be provided downstream of the pressurization unit 60. Furthermore, although not illustrated, the humidity control unit 40 may be provided at a position where moisture can be applied to the mixture descending from the loosening unit 70.
Furthermore, the humidity control unit 40 may be configured integrally with the loosening unit 70, the deposition unit 75, and the like. The humidity control unit 40 can include a pipe connected to an external utility pipe, a pump, various input / output terminals, and the like.

The humidity control unit 40 adjusts the humidity so that the water content is 0.5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the mixture before humidity control. If the moisture content provided by the humidity control unit 40 is within this range, hydrogen bonding between fibers can be induced in the manufactured sheet, the mechanical strength of the sheet is increased, and the amount of water and energy used by the device Can be reduced. The humidity control amount by the humidity control unit 40 is preferably 1 part by mass or more and 15 parts by mass or less, more preferably 3 parts by mass or more and 14 parts by mass or less, and more preferably 5 parts by mass or more and 12 parts by mass or less. Is more preferable, and 7 to 8 parts by mass is particularly preferable. With such a humidity control amount, the mechanical strength of the manufactured sheet S can be improved, and water and energy can be used efficiently.

According to the inventors' investigation, moisture to be imparted to the mixture by the humidity control unit configured to spray water, in which the fiber to be defibrated is a pulp sheet and the additive is a polyester resin powder. When the amount is 5 parts by mass or more and 12 parts by mass or less with respect to 100 parts by mass of the mixture, compared to the case where the amount is 0 part by mass (no addition of water by the humidity control unit), the formed sheet S It has been found that the tensile rupture stress of is 3 times or more.

The amount of moisture provided by the humidity control unit 40 can be adjusted by a valve or a valve that supplies water or the like. The adjustment of the humidity adjustment amount can be adjusted to a predetermined value in consideration of the mass balance such as the amount of material (defibrated material) with respect to the sheet manufacturing apparatus and the throughput of the defibrating unit 20. Further, the amount of humidity adjustment can be adjusted by changing according to the mass balance of the apparatus, the amount of moisture contained in the material to be defibrated, the humidity of the installation environment of the apparatus, and the like.

Further, the humidity control unit 40 is configured to adjust the amount of moisture to be applied based on information on the amount of moisture, humidity, temperature, and the like measured by a moisture amount measurement unit, a humidity measurement unit, a temperature measurement unit, etc. (not shown). May be. The moisture content of the mixture before and after conditioning is measured, for example, by placing a device based on a known optical or electromagnetic principle at an appropriate position inside or outside the sheet manufacturing apparatus 100. be able to. The humidity and temperature can be measured by placing a known appropriate hygrometer and thermometer at appropriate positions inside or outside the sheet manufacturing apparatus 100. The sheet manufacturing apparatus 100 may have a control unit (not shown) that controls the valve and the opening degree of the valve based on these measured values.

The humidity adjustment unit 40 may adjust the humidity so that the amount of moisture after conditioning of the mixture is larger than the amount of moisture contained in the material to be defibrated. In the case where moisture is contained in the defibrated material that is a part of the raw material, the defibrated material is included when the defibrated material passes through the defibrating unit 20 and further through the mixing unit 30. Some or all of the moisture may evaporate and be lost. In this case, the humidity control unit 40 may add more water than at least the lost water. In this way, the water dissipated in the sheet manufacturing apparatus 100 can be sufficiently supplemented, so that hydrogen bonds in the manufactured sheet S can be more reliably formed.

The processing capacity of the humidity control unit 40 can be appropriately designed and adjusted according to the manufacturing capacity (throughput) of the sheet manufacturing apparatus 100. In addition, when passing the heating part 50, the water | moisture content supplied by the humidity control part 40 is heated and evaporated and removed. At that time, a plurality of fibers in the sheet S are bound by hydrogen bonding.

1.4. Heating Unit The sheet manufacturing apparatus 100 according to the present embodiment includes a heating unit 50. The heating unit 50 is provided on the downstream side of the humidity control unit 40 described above.

The heating unit 50 heats the mixture mixed in the above-described mixing unit 30 and humidity-controlled by the humidity control unit 40, binds a plurality of fibers to each other via an additive, and hydrogen bonds between the fibers. Is formed. The conditioned mixture may be, for example, formed into a web shape. Moreover, the heating unit 50 may have a function of forming the mixture into a predetermined shape.

In this specification, “binding the defibrated material and the additive” means that the fiber in the defibrated material is difficult to separate from the additive, and the additive resin is disposed between the fiber and the fiber. In this state, the fibers are hardly separated from each other through the additive. In addition, binding is a concept including adhesion, and 2
This includes a state where it is difficult to leave an object of more than species. Further, when the fibers and the fibers are bound via the composite, the fibers and the fibers may be parallel or intersect, or a plurality of fibers may be bound to one fiber. Further, “fibers are hydrogen bonded” means that a plurality of fibers are bonded (bonded) partially or entirely by hydrogen bonds to each other.

When the resin that is one of the constituents of the additive is a thermoplastic resin, the resin softens when heated to a temperature near its glass transition temperature (softening point) or melting point (in the case of a crystalline polymer). It melts and then solidifies when the temperature drops. The resin softens and comes into contact with the fiber so that the fiber is solidified, and the fiber and the additive can be bound to each other. Further, when other fibers are bound when solidifying, the fibers are bound to each other. When the resin of the additive is a thermosetting resin, it may be heated to a temperature above the softening point, or the curing temperature (
The fiber and the resin can be bound even when heated to a temperature higher than the temperature at which the curing reaction occurs. In addition,
The melting point, softening point, curing temperature, and the like of the resin are preferably lower than the melting point, decomposition temperature, and carbonization temperature of the fiber, and are preferably selected in combination of both types so as to have such a relationship.

On the other hand, the heating unit 50 evaporates a part or all of the moisture contained in the conditioned mixture.
Thereby, the water molecule intervening between the fibers is reduced (removed), whereby hydrogen bonds between the fibers can be formed. Therefore, the heating unit 50 is preferably set to a temperature equal to or higher than the boiling point of water, but may be heated to a temperature equal to or lower than the boiling point of water as long as hydrogen bonding can be performed.

The heating unit 50 may apply pressure in addition to applying heat to the mixture. In that case, the heating unit 50 has a function of forming the mixture into a predetermined shape. Although the magnitude | size of the applied pressure is suitably adjusted with the kind of sheet | seat shape | molded, it can be 50 kPa or more and 30 MPa or less. If the applied pressure is small, a sheet with a high porosity is obtained, and if it is large, a sheet with a low porosity (high density) is obtained.

Specific examples of the configuration of the heating unit 50 include a heating roller (heater roller), a hot press molding machine, a hot plate, a hot air blower, an infrared heater, and a flash fixing device. In the sheet manufacturing apparatus 100 of the present embodiment illustrated in FIG. 1, the heating unit 50 includes the heating roller 5.
1. In the illustrated example, the heating unit 50 heats the web W pressed by a pressing unit 60 (described later). Further, the heating unit 50 may have a function of pressurizing the web W. And by heating the web W, the fibers contained in the web W can be bound together via an additive and a hydrogen bond.

In the illustrated example, the heating unit 50 is configured to sandwich and heat the web W with a roller, and includes a pair of heating rollers 51. A pair of heating rollers 51
Are parallel to each other. Moreover, the heating part 50 can be comprised not only with a roller etc. but with a flat press part. In this case, a buffer unit (not shown) is provided as necessary to temporarily sag the web being conveyed during pressing. On the other hand, by configuring the heating unit 50 as the heating roller 51, it is possible to form the sheet S while continuously transporting the web W as compared to the case where the heating unit 50 is configured as a flat press unit.

FIG. 3 is a diagram schematically illustrating a configuration in the vicinity of the heating unit 50 of the sheet manufacturing apparatus 100. The heating unit 50 of the sheet manufacturing apparatus 100 of the present embodiment includes a first heating unit 50a disposed on the upstream side in the conveyance direction of the web W and a second heating unit 50b disposed on the downstream side thereof, Each of the first heating unit 50 a and the second heating unit 50 b includes a pair of heating rollers 51.
Further, a guide G for assisting the conveyance of the web W is disposed between the first heating unit 50a and the second heating unit 50b.

The heating roller 51 is composed of a hollow cored bar 42 made of, for example, aluminum, iron, or stainless steel. The surface of the heating roller 51 is provided with a fluorine-containing release layer 53 such as a tube containing fluorine such as PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) or PTFE (polytetrafluoroethylene) or PTFE. ing. An elastic layer made of silicon rubber, urethane rubber, cotton, or the like may be provided between the core metal 42 and the release layer 53. By providing the elastic layer, the pair of heating rollers 51 can be brought into uniform contact in the axial direction of the heating roller 51 when the pair of heating rollers 51 are pressed against each other with a high load.

Further, a heating material 5 such as a halogen heater is provided at the center of the core metal 42 as a heating means.
4 is provided. Each temperature of the heating roller 51 and the heating material 54 is acquired by a temperature detection unit (not shown), and the driving of the heating material 54 is controlled based on the acquired temperature. Thereby, the surface temperature of the heating roller 51 can be maintained at a predetermined temperature. Then, by passing the web W between the heating rollers 51, the web W being conveyed can be heated and pressurized. The heating means is not limited to a halogen heater or the like, and for example, a heating means using a non-contact heater or a heating means using hot air may be used.

In addition, although the heating part 50 shown in figure is an example with two pairs of heating rollers 51, the heating part 5
When the heating roller 51 is adopted as 0, the number and arrangement of the heating rollers 51 are not limited,
It can be arbitrarily configured as long as the above action can be achieved. Further, the configuration of the heating roller 51 of each heating unit 50 (the thickness and material of the release layer, the elastic layer, the core metal, the outer diameter of the roller) and the load that presses the heating roller 51 are different depending on each heating unit 50. Also good.

As described above, through the heating unit 50 (heating step), the resin contained in the additive is melted, and the fibers in the defibrated material are easily entangled, and the fibers are bound together, and by hydrogen bonding The fibers are also bonded. The mixture of the defibrated material and the additive that has been conditioned is converted into a sheet S through the heating unit 50.

In the present specification, the sheet S refers to a structure in which a plurality of fibers are two-dimensionally or three-dimensionally bound to each other via a resin and bonded by hydrogen bonding.

The sheet in the present specification is not limited to a sheet shape, and may be a film shape, a board shape, a web shape, or an uneven shape. The sheets in this specification can be classified into paper and non-woven fabric. The paper includes, for example, a mode in which pulp or waste paper is used as a raw material and is formed into a sheet shape, and includes recording paper for writing and printing, wallpaper, wrapping paper, colored paper, drawing paper, Kent paper, and the like. The non-woven fabric is thicker than paper or has a low strength, and includes general non-woven fabric, fiber board, tissue paper, kitchen paper, cleaner, filter, liquid absorbent material, sound absorber, cushioning material, mat, and the like.

1.5. Effects According to the sheet manufacturing apparatus 100 of the present embodiment, it is possible to manufacture the sheet S to which the binding force between the fibers of the defibrated material is provided by resin and hydrogen bonding. That is, the fibers of the defibrated material can be bound by the resin, and the fibers of the defibrated material can be bound by hydrogen bonding. Moreover, in the sheet manufacturing apparatus 100 of this embodiment, humidity control is performed after obtaining the mixture which mixed the defibrated material and the additive. Therefore, compared with the case where moisture is added before obtaining the mixture, the additive can be more favorably dispersed among the fibers in the sheet S. Therefore, according to such a sheet manufacturing apparatus 100, the sheet S having good water resistance and high mechanical strength can be manufactured by a dry method.

Even if the sheet S manufactured by the sheet manufacturing apparatus 100 of the present embodiment is placed in a high-humidity environment or wet with water and the bonding force of hydrogen bonds between the defibrated materials is reduced, the sheet S is dissolved by the resin. Since the binding between the fibers is maintained, the mechanical strength is maintained and the shape is hardly changed, and the water resistance is good.

Furthermore, according to the sheet manufacturing apparatus 100 of the present embodiment, since the humidity control unit 40 that adjusts the humidity of the mixture of the defibrated material and the additive is provided, when a dried defibrated material is used, Even when installed in a humidity environment, hydrogen bonding as a binding force between fibers constituting the sheet S can be sufficiently induced.

1.6. Other Configurations The sheet manufacturing apparatus 100 according to the present embodiment includes, in addition to the above-described defibrating unit, mixing unit, humidity control unit, and heating unit, a crushing unit, a classifying unit, a pressurizing unit, a sorting unit, a loosening unit, and a stacking unit. It can have various structures, such as a part and a cutting part. A plurality of configurations such as a defibrating unit, a mixing unit, a heating unit, a crushing unit, a classification unit, a pressing unit, a sorting unit, a loosening unit, a depositing unit, and a cutting unit may be provided as necessary.

1.6.1. Pressure unit The sheet manufacturing apparatus 100 according to the present embodiment may include a pressure unit 60. In the sheet manufacturing apparatus 100 illustrated in FIG. 1, a pressurizing unit 60 is disposed on the downstream side of the mixing unit 30 and the humidity control unit 40 and on the upstream side of the heating unit 50. The pressurizing unit 60 is configured to pressurize the web W that has been formed into a sheet shape and conditioned after passing through the loosening unit 70 and the deposition unit 75 described later. Therefore,
The pressurizing unit 60 does not have heating means such as a heater. That is, the pressurizing unit 60 is configured to perform so-called calendar processing.

In the pressurizing unit 60, by pressing (compressing) the web W, the distance (distance) between the fibers in the web W is reduced, and the density of the web W is increased. As shown in FIGS. 1 and 3, the pressure unit 60 is configured to sandwich and pressurize the web W with a roller, and includes a pair of pressure rollers 61. The pair of pressure rollers 61 have parallel central axes. In addition, the pressurizing unit 60 of the sheet manufacturing apparatus 100 according to the present embodiment includes a first pressurizing unit 60a disposed on the upstream side in the conveyance direction of the web W and a second pressurizing unit 60b disposed on the downstream side thereof. The first pressure unit 60a and the second pressure unit 60b each include a pair of pressure rollers 61. Further, a guide G for assisting the conveyance of the web W is disposed between the first pressure unit 60a and the second pressure unit 60b.

The pressure roller 61 is configured by, for example, a hollow or solid (solid) core metal 62 made of aluminum, iron, stainless steel, or the like. Note that the surface of the pressure roller 61 is rust-proofing such as electroless nickel plating or iron trioxide coating, or PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) or PTFE (polytetrafluoroethylene). A release layer of fluorine coating such as a tube containing PTFE or PTFE may be formed. An elastic layer made of silicon rubber, urethane rubber, cotton, or the like may be provided between the cored bar 62 and the surface layer. By providing the elastic layer, the pair of pressure rollers 61 that are brought into pressure contact with a high load can be uniformly contacted in the axial direction of the pressure roller 61.

In the pressurizing unit 60, only the pressurization is performed without being heated, so that the resin in the additive does not melt. Moreover, in the pressurization part 60, since only a pressurization is performed without being heated, the water | moisture content in a mixture is hardly removed.

In the sheet manufacturing apparatus 100 of the present embodiment, a pressurizing unit 60 (first pressurizing unit 60a, second pressurizing unit 60b) and a heating unit 50 (first heating unit 50a, second heating unit 50b) are provided. ing. In this example, the heating unit 50 pressurizes the web W, but the pressurizing force of the pressurizing unit 60 is
It is preferably set to be larger than the pressure applied by the heating unit 50. For example, the pressing force of the pressurizing unit 60 is 500 to 3000 kgf, and the pressing force of the heating unit 50 is 30 to 200 kg.
It is preferable to set to f. Thus, by making the applied pressure of the pressurizing unit 60 larger than that of the heating unit 50, the distance between the fibers contained in the web W can be sufficiently shortened by the pressurizing unit 60, and heating and pressurization is performed in that state. Thus, a thin, high density and high strength sheet can be formed.

Moreover, in the sheet manufacturing apparatus 100 of this embodiment, as shown in FIGS. 1 and 3, the diameter of the pressure roller 61 is set to be larger than the diameter of the heating roller 51. In other words, in the conveyance direction of the web W, the diameter of the pressure roller 61 disposed on the upstream side is larger than the diameter of the heating roller 51 disposed on the downstream side. Since the pressure roller 61 has a large diameter, it is possible to efficiently convey the web W in a state where it has not been compressed yet. On the other hand, since the web W that has passed through the pressure roller 61 is in a compressed state and is easy to convey, the diameter of the heating roller 51 disposed on the downstream side of the pressure roller 61 may be small. Thereby, a device structure can be reduced in size. The diameters of the heating roller 51 and the pressure roller 61 are appropriately set according to the thickness and properties of the web W to be manufactured.

The illustrated pressure unit 60 is an example in which there are two pairs of pressure rollers 61.
When 0 is employed and the pressure roller 61 is employed in the pressure unit 60, the number and arrangement of the pressure rollers 61 are not limited, and can be arbitrarily configured within a range in which the above action can be achieved.

Furthermore, the member which can contact the web W between the pressure roller 61 of the pressure unit 60 and the heating roller 51 of the heating unit 50 is only the guide G as a web receiving member capable of supporting the web W from below. It is. Therefore, the distance between the pressure roller 61 and the heating roller 51 can be shortened. In addition, since the pressurized web W is quickly heated and pressed, the spring back of the web W is suppressed and a high-strength sheet can be formed.

When the pressing unit 60 (pressing roller 61) and the heating unit 50 (heating roller 51) are provided in the above-described configuration, they are suitable for thin, high-density and high-strength sheets. For example, it is more suitable for paper than non-woven fabric. On the other hand, when a flat press part is used as the heating part 50, it is suitable for a relatively thick sheet. This is suitable for a sheet having a large thickness and taking a long time to transmit heat to the entire web because the flat press portion can take a longer contact time with the web W than using a heating roller. . In addition, the pressurizing unit 6 is disposed upstream of the flat plate-shaped press unit.
0 may not be present. In this case, since it is not compressed to a high density by the pressurizing unit 60, it is suitable for a relatively low density sheet. The use of a flat press section is more suitable for non-woven fabric than for paper. In addition, in the case of a nonwoven fabric, when the fiber when formed as a sheet has a low humidity, the thickness may increase after being heated and pressed by a flat press portion. Even in such a case, it is possible to prevent the thickness from being changed after the heating and pressurization by heating and pressurizing with the flat press portion after the humidity control.

1.6.2. Classification Unit In the sheet manufacturing apparatus 100 shown in FIG. 1, a classification unit 63 is disposed on the upstream side of the mixing unit 30 and on the downstream side of the defibrating unit 20. The classification unit 63 separates and removes resin particles and ink particles from the defibrated material. Thereby, the ratio for which the fiber accounts for in a defibrated material can be raised. As the classification unit 63, it is preferable to use an airflow classifier. The airflow classifier generates a swirling airflow and separates it by centrifugal force and the size and density of what is classified, and the classification point can be adjusted by adjusting the speed of the airflow and the centrifugal force. Specifically, the classification unit 63
For example, a cyclone, an elbow jet, or an eddy classifier is used. In particular, since the structure of the cyclone is simple, it can be suitably used as the classification unit 63. Below, the case where a cyclone is used as the classification part 63 is demonstrated.

The classifying unit 63 includes an introduction port 64, a cylindrical unit 65 to which the introduction port 64 is connected, an inverted conical unit 66 located below the cylindrical unit 65 and continuing to the cylindrical unit 65, and a lower part of the inverted cone unit 66. A lower discharge port 67 provided in the center and an upper discharge port 68 provided in the upper center of the cylindrical portion 65 are provided.

In the classification unit 63, the airflow on which the defibrated material introduced from the introduction port 64 is placed has an outer diameter of 100 m.
It changes into a circumferential motion at the cylindrical portion 65 of about m or more and 300 mm or less. As a result, the introduced defibrated material is subjected to centrifugal force and separated into fibers in the defibrated material and fine powder such as resin particles and ink particles in the defibrated material. Can do. The component having a large amount of fiber is discharged from the lower discharge port 67 and introduced into the mixing unit 30 through the pipe 86. On the other hand, the fine powder is in the upper outlet 68.
Is discharged to the outside of the classification unit 63 through the pipe 84. In the illustrated example, the tube 84 has a receiving portion 69.
The fine powder is collected in the receiving portion 69. In this way, fine powders such as resin particles and ink particles are discharged to the outside by the classification unit 63, so even if the resin is supplied by the additive supply unit 88 described later, Can be prevented from becoming excessive.

In addition, although it described that it isolate | separates into a fiber and a fine powder by the classification part 63, it cannot necessarily completely isolate | separate. For example, relatively small or low density fibers may be discharged to the outside together with fine powder. Further, fine powder having a relatively high density or entangled with the fiber may be discharged to the downstream side together with the fiber.

Further, when the raw material is not waste paper but a pulp sheet, since the fine powder such as resin particles and ink particles is not included, the sheet manufacturing apparatus 100 may not include the classification unit 63. vice versa,
When the raw material is used paper, it is preferable that the sheet manufacturing apparatus 100 includes the classification unit 63 in order to improve the color tone of the manufactured sheet. In addition, since paper is often required to have better whiteness than non-woven fabric, it is better to have a classifying unit 63 when manufacturing paper, and when manufacturing non-woven fabric, classifying unit 63 is There may be no need.

1.6.3. Crushing Unit The sheet manufacturing apparatus 100 may include a crushing unit 10. Sheet manufacturing apparatus 100 shown in FIG.
Then, the crushing part 10 is arrange | positioned in the upstream of the defibrating part 20. FIG. The crushing part 10 cuts raw materials, such as a pulp sheet and an input sheet (for example, A4-sized waste paper), in the air to make a material to be defibrated. Although the shape and size of the material to be defibrated are not particularly limited, for example, the material to be defibrated is several cm square. In the illustrated example, the crushing unit 10 has a crushing blade 11, and the charged raw material can be cut by the crushing blade 11. The crushing unit 10 may be provided with an automatic input unit (not shown) for continuously supplying raw materials.

A specific example of the crushing unit 10 is a shredder. In the illustrated example, the defibrated material cut by the crushing unit 10 is received by the hopper 15 and then conveyed to the defibrating unit 20 via the pipe 81. The tube 81 communicates with the introduction port 21 of the defibrating unit 20.

1.6.4. Loosening part The sheet manufacturing apparatus 100 may have the loosening part 70. Sheet manufacturing apparatus 1 shown in FIG.
At 00, a loosening unit 70 and a depositing unit 75 are arranged downstream of the mixing unit 30. The loosening unit 70 can introduce the mixture that has passed through the pipe 86 (mixing unit 30) from the introduction port 71 and can lower the mixture while dispersing it in the air. Further, in this example, the sheet manufacturing apparatus 100 includes the stacking unit 7.
5, the depositing unit 75 forms the web W by depositing the mixture falling from the loosening unit 70 in the air.

The loosening part 70 loosens the entangled defibrated material (fiber). Further, when the additive resin supplied from the additive supply unit 88 is fibrous, the loosening unit 70 loosens the entangled resin. Moreover, the loosening part 70 has the effect | action which deposits a mixture uniformly on the deposition part 75 mentioned later. In other words, the term “unwind” includes the action of breaking up intertwined things and the action of depositing them uniformly. The loosening portion 70 has an effect of being uniformly deposited if there is no entanglement.

As the loosening portion 70, a sieve is used. An example of the loosening unit 70 is a rotary sieve that can be rotated by a motor. Here, the “sieving” of the loosening unit 70 may not have a function of selecting a specific object. That is, the “sieving” used as the loosening part 70 means a thing provided with a net (filter, screen), and the loosening part 70 is all of the defibrated material and additives introduced into the loosening part 70. May be dropped.

1.6.5. Depositing Unit The sheet manufacturing apparatus 100 may include a depositing unit 75. The defibrated material and the additive that have passed through the loosening portion 70 are deposited on the deposition portion 75. As illustrated in FIG. 1, the accumulation unit 75 includes a mesh belt 76, a stretching roller 77, and a suction mechanism 78. The deposition unit 75 may include a tension roller (not shown).

The depositing part 75 forms a web W in which the mixture falling from the loosening part 70 is deposited in the air (corresponding to the loosening part 70 and corresponding to the web forming step). The depositing unit 75 has a mechanism for depositing the mixture uniformly dispersed in the air by the loosening unit 70 on the mesh belt 76. In addition, the humidity control unit 4 so as to adjust the humidity of the mixture descending from the loosening unit 70.
0 may be configured.

Below the loosening portion 70, a tension roller 77 (in this embodiment, four tension rollers 7
An endless mesh belt 76 on which a mesh stretched according to 7) is formed is arranged. The mesh belt 76 moves in one direction by rotating at least one of the stretching rollers 77.

Further, a suction mechanism 78 as a suction unit that generates an airflow directed vertically downward is provided below the loosening unit 70 via a mesh belt 76. By the suction mechanism 78, the mixture dispersed in the air by the loosening unit 70 can be sucked onto the mesh belt 76. Thereby, the mixture disperse | distributed in the air can be attracted | sucked and the discharge speed from the loosening part 70 can be enlarged. As a result, the sheet manufacturing apparatus 1
The productivity of 00 can be increased. Further, the suction mechanism 78 can form a downflow in the dropping path of the mixture, and can prevent the defibrated material and additives from being entangled during the dropping.

Then, by moving the mesh belt 76 and dropping the mixture from the loosening portion 70, it is possible to form a long web W in which the mixture is uniformly deposited. Here, “uniformly deposited” refers to a state where the deposited deposits are deposited with substantially the same thickness and substantially the same density. However, since not all the deposits are manufactured as a sheet, it is sufficient that the portion to be a sheet is uniform. “Non-uniform deposition” refers to a state in which deposition is not uniform.

The mesh belt 76 can be made of metal, resin, cloth, or non-woven fabric,
Any mixture can be used as long as the mixture can be deposited and an air stream can be passed therethrough. The hole diameter (diameter) of the mesh belt 76 is, for example, 60 μm or more and 250 μm or less.
If the hole diameter of the mesh belt 76 is smaller than 60 μm, it may be difficult to form a stable airflow by the suction mechanism 78. If the hole diameter of the mesh belt is larger than 250 μm, for example, fibers of the mixture may enter between the meshes, and the unevenness of the surface of the manufactured sheet may increase. Further, the suction mechanism 78 can be configured by forming a sealed box having a window of a desired size under the mesh belt 76 and sucking air from other than the window to make the inside of the box have a negative pressure from the outside air.

As described above, by passing through the loosening part 70 and the depositing part 75 (web forming step), the web W in a soft and swelled state containing a large amount of air is formed. Next, as shown in FIG. 1, the web W formed on the mesh belt 76 is conveyed by the rotational movement of the mesh belt 76. And the web W formed on the mesh belt 76 is conveyed to the humidity control part 40, the pressurization part 60, and the heating part 50 in this example.

1.6.7. Sorting unit Although illustration is omitted, the sheet manufacturing apparatus 100 of the present embodiment may include a sorting unit. The sorting unit can sort the defibrated material that has been defibrated in the defibrating unit 20 according to the length of the fiber. In addition, although the above-mentioned classification | category part 63 stated that fine resin powder etc. were removed, the selection part may have such a function. Therefore, the sorting unit is provided downstream of the defibrating unit 20 and upstream of the loosening unit 70. Further, when the selection unit is provided, it is provided upstream of the humidity control unit 40.

As the selection unit, a sieve can be used. Here, the sorting unit has a net (filter, screen), and sorts one having a size that can pass through the net and one having a size that cannot pass through the net. The sorting unit can be configured in the same manner as the unwinding unit 70 described above, but has a function of removing some components instead of allowing all of the introduced material to pass through like the unwinding unit 70. An example of the sorting unit is a rotary sieve that can be rotated by a motor. The mesh of the sorting part is a wire mesh, expanded metal obtained by extending a cut metal plate,
The punching metal which formed the hole in the metal plate with the press etc. can be used.

By providing a sorting unit, fibers or particles contained in the defibrated material or mixture, which are smaller than the mesh size of the mesh, and fibers, undefibrated pieces, and lumps larger than the mesh size of the mesh can be separated. it can. The selected substance can be selected and used according to the sheet to be manufactured. Further, the substance removed by the sorting unit may be returned to the defibrating unit 20.

The sheet manufacturing apparatus 100 of the present embodiment can have a configuration other than the configuration illustrated above, and can appropriately have a plurality of configurations according to the purpose including the configuration illustrated above. The number and order of the components are not particularly limited, and can be appropriately designed according to the purpose.

1.6.8. Others In the sheet manufacturing apparatus 100 of the present embodiment, on the downstream side of the heating unit 50, the sheet is placed in a direction that intersects the conveyance direction of the web W (the web W that has passed through the heating unit 50 is the sheet S). The 1st cutting part 90a and the 2nd cutting part 90b as the cutting part 90 to cut | disconnect are arrange | positioned. The cutting part 90 can be provided as needed. The first cutting unit 90a includes a cutter, and cuts the continuous sheet S into sheets according to a cutting position set to a predetermined length. Further, a second cutting unit 90b that cuts the sheet S along the conveyance direction of the sheet S is disposed downstream of the first cutting unit 90a in the conveyance direction of the sheet S. The second cutting unit 90b includes a cutter, and cuts (cuts) according to a predetermined cutting position in the conveyance direction of the sheet S.
Thereby, a sheet S having a desired size is formed. The cut sheets S are stacked on the stacker 95 or the like.

Although not shown, the sheet S heated by the heating unit 50 is disposed downstream of the heating unit 50.
You may provide the cooling part which cools. The cooling unit can be configured by a cooling roller or the like, for example. By providing the cooling section, the resin can be quickly cooled, and the sheet S
The structure can be fixed early. Thereby, for example, it is possible to contribute to an improvement in the throughput and downsizing of the apparatus.

2. Sheet manufacturing method The sheet manufacturing method according to the present embodiment uses the above-described sheet manufacturing apparatus 100 to defibrate a defibrated material in the atmosphere, and an additive containing a resin in the defibrated material. A mixing step of mixing the defibrated material and the additive, and a heating step of heating the humidity-adjusted mixture. Since the material to be defibrated, the defibrated material, the fiber, the resin, the additive, the humidity adjustment, the heating, and the like are the same as those described in the section of the sheet manufacturing apparatus, detailed description thereof is omitted.

The sheet manufacturing method of the present embodiment includes a step of cutting a material to be defibrated such as a pulp sheet or waste paper as a raw material in the air, impurities (toner or paper strength enhancer) or defibrated from the defibrated defibrated material. Classifying process for classifying short fibers (short fibers) in the air, sorting process for sorting long fibers (long fibers) and undefibrated pieces that have not been sufficiently defibrated from the defibrated material, mixing A dispersion process that allows the material to fall while being dispersed in the air, a sheet forming process that deposits the mixed material that has fallen in the air to form the web, a pressurization process that applies pressure to the web, and The sheet may further include at least one process selected from the group consisting of a cutting process for cutting the sheet in an appropriate order. Since the details of these steps are the same as those described in the section of the sheet manufacturing apparatus, detailed description thereof is omitted.

According to such a sheet manufacturing method, the sheet S to which the binding force between the fibers of the defibrated material is provided by the resin can be manufactured. Even if the sheet S manufactured by such a sheet manufacturing method is placed in a high-humidity environment or wetted with water and the bonding force of hydrogen bonds between the defibrated materials is reduced, the defibrated material by the resin. Since the binding between them is maintained, the mechanical strength is maintained and the shape is hardly changed, and the water resistance is good. Furthermore, according to such a sheet manufacturing method, since it has a humidity control step of adjusting the humidity of the mixture obtained by mixing the defibrated material and the additive,
Even when a dry defibrated material is used or when it is installed in a low-humidity environment, hydrogen bonding as a binding force between fibers constituting the sheet S can be induced. Thus, a sheet S having good water resistance and high mechanical strength can be produced by a dry method. Furthermore, in such a sheet manufacturing method, humidity adjustment is performed on the mixture obtained in the mixing step of mixing the defibrated material and the additive, so compared to the case where moisture is added before obtaining the mixture. In the sheet S, the additive can be more favorably dispersed among the fibers. Therefore, the strength of the manufactured sheet S can be further increased.

3. Other Matters In this specification, the term “homogeneous” means that, in the case of uniform dispersion or mixing, in an object that can define two or more components or two or more components, one component is relative to another component. This means that the existing positions are uniform throughout the system, or the same or substantially equal to each other in each part of the system. Further, the uniformity of coloration and the uniformity of color tone indicate that there is no color shading when the sheet is viewed in plan, and the density is uniform. However, even if it is said that it is uniform, it includes the case where the distances of all the resins are not the same and the concentrations are not completely the same.

In the present specification, terms such as “uniform”, “same”, “equally spaced”, etc. mean that the density, distance, dimensions, etc. are equal. Although it is desirable that these are equal, it is difficult to make them completely equal. Therefore, it is assumed that the values do not become equal due to accumulation of errors and variations.

In addition, when mixing a defibrated material and an additive, since aggregation of the additive is suppressed by the action of water if water is present in the system (wet) as in the prior art, It was relatively easy to obtain a mixture with good uniformity and a good sheet. However, at present, when manufacturing recycled paper, a technique for consistently producing dry paper from used paper to recycled paper is not always well established. According to the inventors' investigation, it has been found that one of the reasons is the difficulty of making the process of mixing fibers and paper strength enhancer (for example, resin particles) dry. That is, when the fiber and resin powder are mixed in a dry process without any ingenuity, the fiber and resin powder do not mix sufficiently, and in that state the sheet is formed (deposited) to obtain paper. In this case, it has been found that the resin is not uniformly dispersed in the paper surface, resulting in a paper having insufficient mechanical strength. Further, in the dry process, it has been found that when fibers and resin particles are mixed, the resin particles are likely to be aggregated by cohesive force such as van der Waals force, resulting in non-uniform dispersion.

In the above-described effects, it is described that not only the fibers are bound by the additive but also the fibers are bound by utilizing hydrogen bonds. Since water is added, hydrogen bonding is also performed, but it is considered that binding of fibers by the additive becomes stronger by giving a certain amount of humidity to the fibers. In any case, by adjusting the humidity of the mixture obtained by mixing the fiber and the additive, a high-strength sheet can be produced even in the dry type regardless of the state of the raw material and the environment of the apparatus.

The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the present invention includes configurations that are substantially the same as the configurations described in the embodiments (configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. In addition, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment. For example, although the web W is a single layer in the above embodiment, it may be a multiple layer, or a non-woven fabric or paper created separately may be laminated.

DESCRIPTION OF SYMBOLS 1 ... Resin, 2 ... Colorant, 3 ... Composite, 4 ... Mother particle, 5 ... Shell, 10 ... Crushing part, 11 ... Crushing blade, 15 ... Hopper, 20 ... Defibration part, 21 ... Inlet port, 22 ... discharge port, 30 ... mixing section, 40 ...
Humidity control unit, 50 ... heating unit, 50a ... first heating unit, 50b ... second heating unit, 51 ... heating roller, 52 ... cored bar, 53 ... release layer, 54 ... heating material, 60 ... pressurizing unit, 60a ... 1st pressurizing part, 60
b ... 2nd pressurization part, 61 ... Pressure roller, 62 ... Core metal, 63 ... Classification part, 64 ... Inlet, 65
... Cylindrical part, 66 ... Reverse conical part, 67 ... Lower outlet, 68 ... Upper outlet, 69 ... Receiving part, 70
... loosening part, 71 ... introduction port, 75 ... deposition part, 76 ... mesh belt, 77 ... tension roller, 78 ... suction mechanism, 81, 82, 84, 86 ... pipe, 87 ... supply port, 88 ... supply of additive Part, 90 ... cutting part, 90a ... first cutting part, 90b ... second cutting part, 95 ... stacker, 1
00 ... Sheet manufacturing device, G ... Guide, W ... Web, S ... Sheet

Claims (6)

A defibrating unit for defibrating objects to be defibrated in the atmosphere;
A mixing unit that mixes a powdered additive containing a resin into a defibrated material that can be defibrated and hydrogen bonded,
A humidity control unit that adjusts the humidity of the mixture obtained by mixing the defibrated material and the additive, and the moisture content is 0.5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the mixture before conditioning. A humidity control section that adjusts the humidity to
A pressurizing unit that pressurizes the mixture conditioned by the humidity control unit without melting the mixture,
And a heating unit Ru is bound by heating the mixture pressurized by the pressurizing unit, the sheet manufacturing apparatus. The fibers in the defibrated material have an average total length of 1 μm to 10 mm, an average diameter of 1 μm to 1000 μm,
The particle size of the additive state, and are more 50μm or less 1 [mu] m,
The sheet manufacturing apparatus according to claim 1, wherein the mixing unit mixes the defibrated material so that a ratio of the additive is 5% by mass or more and 70% by mass or less .   3. The sheet manufacturing apparatus according to claim 1, wherein the humidity adjusting unit adjusts the humidity so that a moisture content is 5 parts by mass or more and 12 parts by mass or less with respect to 100 parts by mass of the mixture before humidity adjustment. .   The sheet manufacturing apparatus according to any one of claims 1 to 3, wherein the mixing unit supplies the additive to the defibrated material flowing by an air flow. 5. The heating unit according to claim 1, wherein the heating unit includes a plurality of pairs of heating rollers each including a heating material, and heats the mixture while pressing the mixture between the pair of heating rollers of each group. The sheet manufacturing apparatus according to claim 1. A defibrating process for defibrating objects to be defibrated in the atmosphere;
A mixing step in which a powdered additive containing a resin is mixed in the atmosphere with a defibrated material that can be defibrated and hydrogen bonded;
It is a step of conditioning the mixture obtained by mixing the defibrated material and the additive, so that the moisture content is 0.5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the mixture before conditioning. Humidity control process to condition the humidity,
A pressurizing step of pressurizing the mixture conditioned by the humidity control step without melting the mixture;
A heating step of heating and binding the mixture pressed in the pressing step .

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