CN1311130C - Embossed tissue having loosened surface fibers and method for its production - Google Patents
Embossed tissue having loosened surface fibers and method for its production Download PDFInfo
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- CN1311130C CN1311130C CNB038097141A CN03809714A CN1311130C CN 1311130 C CN1311130 C CN 1311130C CN B038097141 A CNB038097141 A CN B038097141A CN 03809714 A CN03809714 A CN 03809714A CN 1311130 C CN1311130 C CN 1311130C
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- thin paper
- paper
- brushing
- embossing
- elongated fibers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/006—Making patterned paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/14—Making cellulose wadding, filter or blotting paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0707—Embossing by tools working continuously
- B31F2201/0715—The tools being rollers
- B31F2201/0723—Characteristics of the rollers
- B31F2201/0725—Hardness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0707—Embossing by tools working continuously
- B31F2201/0715—The tools being rollers
- B31F2201/0723—Characteristics of the rollers
- B31F2201/0728—Material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0758—Characteristics of the embossed product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0758—Characteristics of the embossed product
- B31F2201/0761—Multi-layered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F2201/00—Mechanical deformation of paper or cardboard without removing material
- B31F2201/07—Embossing
- B31F2201/0784—Auxiliary operations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Sanitary Thin Papers (AREA)
Abstract
The present invention relates to paper tissues and paper tissue products, and in particular to disposable handkerchiefs, kitchen paper towels, toilet paper and facial tissues. More particularly, the invention relates to paper tissue product exhibiting a soft and smooth surface, and a high bulkiness together with a high strength, in order to provide to the user an enhanced functionality and a high degree of comfort during usage.The present invention also relates to the process of making paper tissue and paper tissue products, and in particular to disposable handkerchiefs, kitchen paper towels, toilet paper and facial tissues, presenting the characteristics mentioned above and including the process steps of embossing and brushing of the surface of the tissue.
Description
Invention field
The present invention relates to thin paper and thin paper products, relate to disposable handkerchief, paper handkerchief for kitchen use, toilet paper and face tissue specifically.
More particularly, the present invention relates to show to have not only soft but also smooth surface and high bulkiness and high-intensity thin paper products, so that provide the product that a kind of function is abundanter, have the high comfort sense when using to the user.
The present invention also relates to make and present above-mentioned characteristic and comprise the embossing on thin paper surface and the thin paper and the thin paper products of brushing operation, is the method for disposable handkerchief, paper handkerchief for kitchen use, toilet paper and face tissue specifically.
Background of invention
Thin paper is sometimes referred to as paper web or paper, thin paper, tissue layers, multiple layer paper or tissue web, and its manufactured goods, and for example paper handkerchief, paper handkerchief for kitchen use or toilet paper have obtained to use widely and be well-known in the art in modern society.
Thin paper adopts the following steps manufacturing usually: make cellulose fibre stratification on screen cloth of hygrometric state, add various additives or other compositions, subsequently oven dry.Before the above-mentioned system paper step, during or afterwards other operation be intended to give thin paper desired character.The purpose of conversion step is thin paper is processed into finished product.
The product of being made by thin paper can maybe can comprise individual layer thin paper (single layer articles) by making in conjunction with multi-ply tissue (being also referred to as multiple layer).Those multiple layers can make up and in conjunction with to form finished product by multiple mode, for example by to the sandwich construction embossing or/and by gluing.Finished product is called thin paper products herein.
Think always that for a long time the important physical attribute of these thin papers comprises intensity and thickness/bulkiness, pliability and smoothness and their absorbability.Present research and development direction is, under the not serious prerequisite that influences other attribute, improves one or improve attribute simultaneously two or three.
Pliability and smoothness relate to the sense of touch that a certain specific products is held in the hand, can experiences when rubbing wrinkle with product wiping skin or with product in hand as the user.Sense of touch is the combination of some physical attributes.Can obtain sense of touch well by the target component of physiology surface flatness (PSS) parameter (for example from United States Patent (USP) 5,855,738).Thickness/the paper of thin paper products thick (being also referred to as bulkiness) is quite important for user's sense of touch.
Intensity is meant under the regular service conditions that product keeps physical integrity and anti-tear broken, anti tear and anti-tear broken ability.
Absorbability is meant that thin paper or product absorb the particularly ability of aqueous solution or dispersion liquid of big quantity of fluid.When the overall absorption performance of user institute perception is commonly considered as given quality thin paper or product and is soaked into absorb the total amount of liquid and absorb the combination of the speed of liquid.
But relative thicker softer disposable paper products promptly is the disposable paper products of paper handkerchief form, and is well known.For example, Procter ﹠amp; The Tempo of Gamble Company
TMBe not only thick but also soft multi-ply paper product, its thickness is about 0.3mm.The sensation that thickness a kind ofly does greatly then can for the user, wet strength is all very high.High wet strength is also referred to as wet burst strength, especially can prevent to tear or break.For paper handkerchief, this tear or break can cause mucus or other body fluid user's the hand of making dirty.
The common method that strengthens the thin paper surface flatness is that material is carried out press polish.For example, people's such as Weisman United States Patent (USP) 5 ' 855 ' 738 has been described a kind of press polish step that helps to make smooth high density thin paper.This manufacturing step flattens the surface of thin paper, and paper fiber reorientation is also bondd again.Yet, press polish to a great extent attenuate the thickness of paper web, damaged the desired bulkiness of final products.
The method of producing high bulkiness thin paper is described to some extent: for example in the United States Patent (USP) 5 ' 702 ' 571 and BP 0 696 334 B1 that all belong to people such as Kamps.In these two patents, strengthen the bulkiness of thin paper by embossing between a protruding engraved roll and formed roll gap of recessed engraved roll.In the patent application EP01103798.3 that submits to February 16 calendar year 2001, provided another embodiment at K.Hilbig, M.Liplijn and H.Reinheimer, its surface that is included in paper forms three-dimensional structure (micro-embossed by before the press polish step is also referred to as tensile deformation).This is a kind of method that forms quite level and smooth and bulk final products.Yet above-mentioned thin paper still will experience the press polish step, and compares with the thin paper that micro-embossed is crossed, and thickness significantly reduces.
The another kind of method on the smooth thin paper of acquisition known in the art surface stands the brushing step for making thin paper.The brushing of thin paper is well-known in the art, and is specifically described in people's such as Wand United States Patent (USP) 3 ' 592 ' 732.Wherein use rotary brush brushing thin paper, use engraved roll or recessed roller as counter-pressure surface.In United States Patent (USP) 5 ' 180 ' 471, people such as Sauer have described inner surface and have passed through the multi-ply tissue (and method) of brushing.The brushing that it is believed that paper surface this paper by the thin paper near surface is called a not end of bonding of the paper fiber of elongated fibers paper fiber (cellulose fibre) is had an effect, therefore elongated fibers can be exceeded more than the paper surface, thereby produce the smooth surface of sense of touch.Yet its shortcoming is, obviously which kind of method don't work, brushing all can be damaged the intensity of paper web, constitutes the structure (as mentioning) of the network of fibers of paper web because it has changed in above-mentioned references to U.S. patent 3 ' 592 ' 732, and has reduced the bonding between the fiber that constitutes the thin paper surface.
Prior art proposes, and each of said method all exists shortcoming,, has influenced the another kind of or multiple key characteristic of thin paper again when managing to improve a kind of key characteristic that is.
In view of prior art and above-mentioned consideration, exist a kind of demand that has the thin paper of following obvious inconsistent characteristic concurrently:
High surface flatness,
High strength,
High thickness/bulkiness,
Common but the non-finished product of always being made by the multi-ply tissue combination also had same demand.
The present invention has satisfied this demand.
Summary of the invention
The present invention relates to comprise the thin paper of cellulose fibre.Thin paper have first and second surfaces and on first surface, form by the depressed area around the embossed pattern of convex area.Each each reverse zone regional and on the second surface of thin paper conforms to.First surface has elongated fibers, and it has first and second ends, and first end is not bonded to second end with thin paper and then bonds together with thin paper.The unconfined end of elongated fibers can obtain by the brushing first surface, so that more more than in the sunk area of the elongated fibers in the elevated regions.
The present invention also relates to the paper products such as handkerchief, paper handkerchief, face tissue and toilet paper made by one or more layers above thin paper.
The present invention also relates to make the method for above-mentioned thin paper.This method may further comprise the steps:
-by with thin paper between two rollers that form the embossing roll gap by coming embossed tissue,
At least one surface of-brushing thin paper.
Preferably, the method is characterized in that the brushing operation carries out after the embossing step.
The document of this paper all references all is introduced to the relevant part of this article for reference; Any document quote the approval that may not be interpreted as can obtaining patentability of the present invention to it.
Summary of drawings
Fig. 1 represents also to show to have the paper handkerchief of not straight/uneven surface substantially by what 3 layers of thin paper (being also referred to as multiple layer or layer) were formed.
Fig. 2 is the amplifier section of Fig. 1, can see three layers of thin paper in the above.
Fig. 3 shows the method for manufacturing thin paper as shown in Figure 1.
Fig. 4 is presented at the amplifier section of I place, the position thin paper of Fig. 3.
Fig. 5 is presented at the amplifier section of II place, the position thin paper of Fig. 3.
Detailed Description Of The Invention
The invention provides a kind of demonstration have high-caliber surface flatness and flexibility, high strength and The thin paper of high bulkiness. These obvious conflicting characteristics make up by following theory of the present invention Arrive together.
Not bound by theory, it is to form a thin paper surface that the theory of back of the present invention specifically can be said to be, and it is inhomogeneous and has following expection characteristic in zones of different:
Smoothness/flexibility in the outburst area (elevated regions), the existence of the paper fiber ends by pine obtains, and it keeps the haptic effect of thin paper,
Intensity in the interior zone (sunk area), unaltered network of fibers obtains by providing basically,
Bulkiness forms by projection and the special existence of sunk area, and passes through these workers Two kinds of order also preferably by the downstream of its order that determines via conversion processing thin paper Operation and remaining.
This can obtain by thin paper being used selected operation. These operations are optimized to produce institute The final result of expectation also produces synergistic enhancing effect. They are preferably undertaken by specific order.
The present invention is called each step of " conversion procedure of processing " specifically with this area relevant, wherein The thin paper made from any suitable " paper method processed " is provided.
The present invention can carry out by following operation:
-a kind of thin paper is provided.
-with thin paper send to plan the operation carry out with preferably to the surface and/or the internal structure modification of thin paper so that for thin paper provides desired characteristic,
And/or
-it is combined with one or more thin papers forming a kind of goods or a kind of entity that is transformed into a kind of goods,
And/or
-sending entity or goods to will carry out other operation carries out modification with surface and/or internal structure to goods or described entity.
To describe with the step of making this thin paper with reference to the accompanying drawings now according to thin paper of the present invention.
Embossing (stretching embossing or micro-embossed or tensile deformation)
Although can in the present invention, utilize any embossing type known in the art, a kind of preferred embossing step is so-called micro-embossed or stretching embossing step, be also referred to as tensile deformation, as K.Hilbig, M.Liplijn and H.Reinheimer in February 16 calendar year 2001 submit to European patent application EP 01103798.3 described in, wherein adopt low pressure to carry out the embossing of very meticulous pattern.
Can on one deck thin paper, carry out embossing, for example Fig. 3,4 or 5 reference number (13) or reference number (2), (3), (4) of Fig. 1 and 2.Alternatively, can on multi-layer body, carry out embossing, for example the reference number of Fig. 1 (1).For for simplicity, be described as one deck thin paper (being the individual layer entity) below the reference number of Fig. 3 (13), but the technical staff understands, multi-layer body the available reference number such as Fig. 1 (1) replaces under the condition of the present invention not departing from.
As shown in Figure 3, the embossing of one deck thin paper, for example those embossing of Fig. 1 and 2 reference number (2), (3), (4), or the embossing of multi-layer body, for example a kind of embossing of Fig. 1 reference number (1), usually finish by the roll gap (8) that thin paper or multi-layer body (reference number of Fig. 3 (13)) is passed in formation between knurling rolls (9) (10), wherein at least one knurling rolls (9) comprise embossing units (12).
Knurling rolls typically comprise smooth surface.Embossing units (12) is the projection that exceeds the certain altitude on knurling rolls surface, and its height is the distance that the peak of projection is arrived on smooth roller surface from the orientation measurement perpendicular to the knurling rolls axis.
Embossing units also has one in width and a length diametrically of being parallel on the roll axial direction.Term width that text is used and length can be the diameter of circular embossing units.Like this, a kind of diameter needn't be constant from bottom to its top of embossing units.Preferably, the Breadth Maximum of embossing units is on the described smooth surface.
Embossing units (12) can be Any shape, for example taper or hemispherical, and the cross section of embossing units can be circle, ellipse or square.Embossing units can form continuous pattern, but preferably completely different each other, for example the smooth surface of roller forms continuous plane.
In one embodiment of the invention, with embossing units (12) with very meticulous pattern setting at least one knurling rolls, every square centimeter of surface area of knurling rolls comprises at least 30, preferably at least 50, more preferably at least 60, also more preferably at least 70, at least 80 embossing units most preferably.
Embossing units is not high, and preferably its height is less than 1mm, more preferably less than 0.8mm, and also more preferably less than 0.6mm, even more preferably less than 0.5mm or less than 0.4mm, and most preferably less than 0.3mm.
Preferably, the embossed area of stretching embossing is 5% to 95% with the ratio of embossed area not, more preferably is 20% to 80%, and is most preferably 40% to 60%, and promptly for most preferred example, 40% to 60% of thin paper total surface area is pressed flower.
The operator scheme of any known knurling rolls type and this roller all within the scope of the present invention.Specifically, can use two hard metals (for example steel) knurling rolls, be called protruding roller and comprise that second knurling rolls of the groove that matches are called recessed roller comprising first knurling rolls of protruding embossing element.Groove can be the mirror image of protruding embossing units, also can be slightly less than the actual mirror picture, and the size of those grooves in the promptly recessed roller or shape (as the inclined-plane) can be different slightly.Also may use so-calledly, that is, use two rollers with coupling projection at the pin embossing.
Alternatively, the paper web contact-making surface that is provided by the hard metal that comprises protruding embossing units is provided first knurling rolls, second knurling rolls by softer material (for example comprises, rubber, preferred Shore hardness is the material of 40-70) the paper web contact-making surface made, wherein, when tightly contacting, formed groove with the embossing units of projection.The embossing roll gap that uses hard metallic roll and rubber rollers to provide has many advantages, and is for example more cheap, be easier to produce and operation, and this is because the adjustment of roller is more much easier than the hard metallic roll of concave, convex.
Will with two knurling rolls between nip size depend on the thin paper that will process and embossed pattern of use etc.Also to consider the pressure that first knurling rolls and second knurling rolls are rolled simultaneously be zero, also can be non-vanishing.
When in this process, using two hard metallic roll (protruding roller and recessed roller), should operate knurling rolls makes reserve a fixed gap between the bottom portion of groove of the protruding embossing units of protruding roller and recessed roller, gap length be not embossed tissue thickness 60% to 140%, be preferably 80% to 120%.
When uniting hard metallic roll of use and rubber rollers, two knurling rolls should apply certain pressure mutually and bear against together, pressure limit can be the 10N/ square centimeter to the 1000N/ square centimeter, be preferably the 20N/ square centimeter to the 200N/ square centimeter, more preferably the 50N/ square centimeter is to the 100N/ square centimeter.
Known operator scheme all is applicable to the present invention, is preferably that knurling rolls do not heat and with identical speed operation, but in alternative operator scheme, can heat knurling rolls at least and allow knurling rolls turn round with friction speed.
The embossing of above-mentioned fine pattern is played the effect that increases thickness at one aspect important, or in other words, increases the volume of goods.Therefore, in a kind of preferred pattern of the present invention, the individual layer thin paper is passed embossing roll gap (Fig. 3, (8)).In a kind of alternative operator scheme, many layer thin papers can be passed roll gap (Fig. 3, (8)) simultaneously.This can cause initial matching or nested embossing between thin paper.
The brushing step:
According to an aspect of the present invention, the brushing of thin paper (Fig. 3, reference number (13)) is preferably carried out after the embossing step, but also can regard the independent process that described expected results is provided to it as.
Term brush and brushing are to be used as embodiment in this document, but do not limit the scope of the invention.According to the present invention, it is for providing any instrument, equipment or the device of desired modification (promptly lifting fiber ends not exclusively separates) on the surface of thin paper and structure.The abradant surface that this traditional class device comprises any kind is those abradant surfaces of providing of bristle or the sand paper by brush for example.Provide and grind the natural or synthetic material manufacturing of functional resulting structure such as foam, metal or polymer.Produce desired grinding, preferably need the relative motion between thin paper surface and wearing terrain.As alternative, cause chemistry, optics or the physical method of the described modification of thin paper surface and/or structure randomly to be considered in the present invention.
Preferably, the surface of thin paper uses the throw that contacts with the thin paper surface grinding to realize with structural modification, most preferably adopts to comprise along the brush cylinder of the brushing bristle of its whole circumference.Bristle can be polymer but preferably adopts antistatic property natural materials preferably such as animal hair or fur.
The brushing step can by one, the one side that is combined in thin paper of two or more brushes is carried out or carry out on the two sides, it depends on desired Expected Results.Each thin paper face can adopt a brush (or brush cylinder).Yet for simplicity, the embodiment of the following description of the present invention has a brush cylinder (representing with reference number 11) that acts on the thin paper one side in Fig. 3.Also can adopt alternative means.For example, can imagine two or more brushes brushing first and second surfaces simultaneously or continuously that act on same thin paper side.In an embodiment preferred of the present invention, used 5 pairs of brushes, provide 5 brushings operations at each face of paper web.
The main result of brushing step is the modification of the fiber that outermost is crouching on the thin paper surface.The thin paper fiber is bonded to each other by hydrogen bridge in numerous fiber intersection points during thin paper manufacturing, drying or press polish subsequently usually.The inventor be sure of, during the brushing step, the paper fiber possesses enough energy and interrupts some hydrogen bond that fiber is combined and the combination that guarantees paper structure.This energy tear edge or shearing force by each bristle when colliding with fiber provides.Not bound by theory, the inventor believes, energy must be enough to interrupt interfibrous some key but low again be not enough to interrupt all keys and force fiber to disconnect (being also referred to as Soft flocks) fully from the thin paper surface and do not interrupt fibre structure itself.
By brushing step of the present invention, formed the elongated fibers (7) shown in Fig. 2 and 5, promptly still to be bonded on other fiber another end simultaneously be freely and can be higher than the fiber on thin paper surface for fiber ends.These elongated fibers (7) provide tactile smoothness and flexibility very crucial for thin paper.
The purpose of the method according to this invention is preferably by interrupt the only end that unclamps or discharge fiber with other interfibrous bonding an end.Yet according to observations, the brushing step is also impelled some whole fiber to break away from fully inevitably or is made fibre beakage.These fibers or fibre debris should be removed from thin paper, thereby help to reduce Soft flocks.They can be reproduced.The method according to this invention can schematically be seen Fig. 3: at first provide a paper web (13), usually uncoiling from the winding web.With embossing station of paper web (13) guiding, this paper web was led the roll gap (8) between two knurling rolls (9), (10) herein.After embossing, then with thin paper (13) guiding brushing station, at least one side is subjected to the effect of a brushing cylinder (11) herein.Can start brushing cylinder rotation so as its surface along or the motion or slack against the thin paper motion.Equipment, the especially setting of brushing cylinder, for example rotating speed, brush to distance, the brush winding of paper web on every side of paper web prolong, pattern with brush, the for example processing of the density of the bending moment of the characteristic of bristle, length, bristle, bristle and diameter, bristle and coating, optimised so that the thin paper quality after the brushing (by analyzing intensity, smoothness, flexibility and the volume of thin paper), lifetime results the best of the stability of method and equipment.
The intrinsic power that can be only act on the brush with the tissue web that moves is implemented the brushing step, promptly need not to use anti-roll or counter-pressure surface to pressurize and/or thin paper is directed at brush.As shown in Figure 3, has only the tension force of tissue web and be equivalent to focusing on certainly on the rotary brush (11) of thin paper and exert pressure.
Alternatively, adopt a counter-pressure surface (the more preferably anti-roll form of rotating with the superficial velocity that approaches paper surface speed): the part while that the placement of counter-pressure surface should make paper web, the two contacted with brush and counter-pressure surface.Even more preferably, the position of counter-pressure surface and the path of paper web should make the convex surface of paper web be subjected to the effect of brush.Not bound by theory, therefore it is believed that this configuration " opens " micro-structural of paper web and strengthen the effect of brush to sheet fiber.This configuration partly twines anti-roll and realizes (with the discontiguous paper surface of anti-roll thereby have the convex surface that contacts with brush) by for example having paper web.
When in operation, adopting, some brush can be placed in such a way, even the two sides of their whiles or continuous brushing paper web above a brush cylinder.
In implementing a kind of preferred mode of the present invention, brush is rotating on the direction that paper web moves on the conversion line.Yet also can consider reverse rotation.
The same with the pattern of brush, its rotary speed is being the parameter of a key aspect the effectiveness of brushing step, influences the wearing and tearing of device and the final result of operation.Preferably, the brushing cylinder is higher than 1 ' 000m/ minute (contact point is to the linear velocity of paper web) with respect to the speed of paper surface, more preferably surpasses 3 ' 000m/ minute, most preferably surpasses 2 ' 000m/ minute, also most preferably above 3 ' 000m/ minute.
Apparent surface's speed of brush also can be calculated according to the superficial velocity of paper web: the superficial velocity of having observed brush be between 1.5 to 20 times of superficial velocity of paper web (more preferably between 2 to 15 times, most preferably between 5 to 10 times), the present invention can obtain best result.
The character and the pattern that are used for brush of the present invention (Fig. 3, reference number (11)) are very wide, comprise synthetic, metal or natural hair, and its size and density range are very wide.In implementing a kind of preferred mode of the present invention, Mink GmbH (Goeppingen, the brush of Germany) being sold of making by horsehair under reference list ZZB12528-K2509 have been adopted.Such brush is generally used for the processing of textiles.Preferably, brush is circular also passing through around an axis rotating operation basically.Yet the inventor considers it as a part of the present invention; Use the brush (for example, fixed brush or the brush that the translation on paper surface moves by surface of the electric brush or lapped face) of other type, the action of the brush that is provided causes in thin paper surface and structural described modification.
In implementing a kind of preferred mode of the present invention, pressed the tissue web of spending around two brush rollers, need not be fixed on the deflector roll.A surface of each brushing roller brushing thin paper.The travel distance of thin paper on surface of the electric brush (be the coiling length of thin paper around brush, or in other words, the contact length between brush and thin paper) can change within a large range.Although considered the length range of broad, have been found that with this length setting for less than 20cm, preferably less than 5cm, most preferably be useful less than 1cm.
Have the thin paper of more staple fibre for the heterogeneous mixture of making long and short fiber in the papermaking operation, an one side than another side, the present invention has considered the preferred direction of paper web on brush.Preferably, thin paper or brush being adjusted into the staple fibre that makes thin paper contacts with brush.Not bound by theory, it is less to be easy to imagine that staple fibre connects to each other.Therefore compare with long fiber one side of thin paper, it is easier that the more multi-fibre end of staple fibre one side is untied.
It is 1% to 25% that the brushing step of having observed thin paper helps to make its thickness to increase and measured the increase scope, average about 5%.Importantly, the increase on this thickness that causes high volume is for by the embossing step, preferably the thickness increase that produces of tensile deformation operation adds.According to European patent application EP 01103798.3 above, tensile deformation itself makes thin paper thickness increase about 50% to 200% usually.
Compare with aforementioned method in European patent application EP 01103798.3, an advantage of the invention is the possibility of the traditional press polish step after the cancellation tensile deformation step.This traditional press polish causes the attenuate of the thin paper thickness that tensile deformation crosses usually, causes total thickness to increase (after two steps: tensile deformation and smooth press polish) 10% to 100%.Cancellation press polish after the embossing but the paper web acquisition adopting brushing to make to handle be high final thickness unusually, and scope is 51% to 225% in the above embodiment that provides.
In enforcement shown in Figure 3 a kind of preferred mode of the present invention, Fig. 3,4,5 thin paper (13) front have been sent to the embossing step, most preferably, be sent in this document described micro-embossed (or stretching embossing or tensile deformation step) under " embossing " title.In that event, thin paper (13) enters in fact air spots of brushing step, promptly exists by formed elevated regions respect to one another of embossing step (6) and sunk area (5).
Brushing is unexpected and constitutes crucial a discovery of the present invention the influence of the thin paper of this pre-deformation: have been found that the brushing step acts preferentially on elevated regions (6), do not change sunk area (5) simultaneously basically.Therefore, with respect in sunk area (5), in elevated regions (6), formed more elongated fibers (7).Thereby formed a network of unaltered sunk area basically.This network kept basically the being untreated intensity and the tensile properties of thin paper.
This has obtained Expected Results, promptly form and have height flexibility and smoothness (specifically, elongated fibers by elevated regions provides), high strength (providing specifically) and bulkiness (existence by protruding and sunk area provides) by the sunk area network that does not become.
Other operation
The method of making thin paper products of the present invention can comprise many other optional step: following some embodiment that are not limited to its scope, function or character that provided:
Available any suitable method is administered to washing lotion on the thin paper, such as but not limited at stamp or spray on one or more surfaces of thin paper or paper products or on these surperficial parts.
Can be preferably by connect embossing with thin paper and put synusia and couple together so that the paper products of a multilayer to be provided." connection embossing " used herein refers to a kind of embossing, by this embossing process, comes out according to all layers of multi-layer product of the present invention are can be in an operation embossed." H.Reinheimer, K.Hilbig have described " being connected embossing " in WO-95/27429 with W.Schmitt.Preferably, connect the smoothness that embossing can or can not influence any press polish thin paper at least to a great extent.Therefore, preferably the not embossed surface of paper products accounts for the major part of total surface, preferably on first and second surfaces.In this article, this means that thin paper has one or more zones that do not connect embossing, also can select to have one or more zones that connect embossing that have, do not comprise that wherein the zone that connects embossing accounts for 50% of thin paper surface area at least, be preferably at least 80%, in certain preferred aspects up to 99%.Modally be to comprise that the zone that connects embossing approaches thin paper edge (for example along two or four edges).Connect embossing and also can be used for ornamental purpose (for example form pattern or be combined into logo or brand name).Preferred connect embossing adopt steel to steel, at the pin type embossing method, every square centimeter has 10 to 40 embossing units, the embossing units height is 0.01mm to 1mm, preferred heights is 0.05mm to 0.2mm.In the thin paper products total surface, the percentage that connects relative not embossing of embossed area or meticulous embossed area is preferably 0.01% to 5%.Adopt to connect embossing realization connection, can cause thin paper products compacting to a great extent.Therefore, embossing units and its counter pair are (for example, the two piece pins of use during at the pin embossing) space between is less than the thickness of the thin paper that will impress, typically be 5% to 50% of this thin paper thickness, be preferably 10% to 20%, can produce 10,000 to 50 like this, the impression pressure of 000N/ square centimeter.
According to the present invention, the method for manufacturing thin paper products also can comprise the step with thin paper net or paper products scale:
As required, thin paper products of the present invention can have mark functional or attractive in appearance.Mark can be produced on appointing on the one or both sides of thin paper products surface.Mark can cover all or part of of thin paper products, can be continuous or discontinuous pattern.
Mark can for example spray, push and preferred Decal is added to the thin paper products surface by any known method in this area.
Embodiment:
Thin paper:
A slice thin paper according to the present invention is from a tissue web cutting-out and present uneven surfaces, and uneven surfaces can obtain by for example micro-embossed operation.It typically every square centimeter of degree of depth with 30 to 100 sunk areas and sunk area typically less than 260 μ and typically its diameter greater than 20 μ.
The thickness of thin paper depends on manufacture method to a large extent, and typically is each natural tissue layers 100 μ, and is 150 μ to 200 μ when embossing or tensile deformation.When 3 layers of combination (after the embossing) were formed finished product, this causes thickness was about 400 μ to 500 μ.
Each size of thin paper is uncorrelated, because it almost only depends on the setting of the cutting equipment on the manufacturing machine.
As Fig. 5 finding, the elevated regions (6) of thin paper (13) has shown visible elongated fibers (7) under microscope or magnifying glass camera lens.The end of fiber is not bonded on other fiber and therefore has the ability of stretching out the thin paper surface.
These elongated fibers it is believed that the characteristic that provides specific.According to the present invention, it is to cause above-described beneficial effect, the reason of flexibility, smoothness and the bulkiness of thin paper specifically.On the other hand, the strength characteristics of thin paper is constant basically, because the quantity of the elongated fibers in the sunk area is less than the quantity in the elevated regions.
The present invention generally comprises any thin paper (13) of have projection (6) and sunk area (5).Its usually in elevated regions (6) than there being more elongated fibers (7) in the sunk area (5).Yet, the present invention preferably adopt elevated regions than the sunk area as many as lack 20%, more preferably as many as few 50% and most preferably the elongated fibers of as many as few 80% implement.
The counting of elongated fibers can be under low power (for example 10 times of magnifying glass camera lenses) by estimating the elongated fibers in elevated regions and two zones of sunk area density or number or undertaken by those elongated fibers of numerical computations.
Paper handkerchief:
At Tempo
TMIn the specific embodiment of paper handkerchief, handkerchief typically is made of 3 to 4 layers of thin paper.The basic weight of handkerchief is about 50g/sqm to 80g/sqm (every layer of promptly about 18g/sqm), and thickness is 400 μ to 600 μ (every layer of about 140 μ).Each layer connects together by special embossing according to WO95/27429, and or by the gluing pattern that each layer is remained to together and realize specific pattern in the paper handkerchief surface.In a certain embodiments, according to the present invention, only two of handkerchief outer surfaces (in each layer combination back) have the unconfined fiber ends in the elevated regions at thin paper.Other surface of thin paper (inward-facing surface of outside thin paper and the surface of inner thin paper) presents elevated regions and sunk area that bulkiness and thickness are provided, but the projection and sunk area on the nothing about bundle fiber quantity about equally.
Although illustrated and described the present invention with specific embodiments, it will be apparent to those skilled in the art that many other variations and modifications may be made in the case of without departing from the spirit and scope of protection of the present invention.So all such changes and modifications that in additional claims, are included in the scope of the present invention consciously.
Absorbent article:
In another embodiment, thin paper according to the present invention is used as absorbent article.
" absorbent article " be meant and absorb and the device of receiving fluids, more particularly, is meant the device of being close to wearer's health or contiguously placing, be used to absorb and hold the various exudates that discharged by health.Absorbent article includes but not limited to diaper, adult-incontinence panty girdle, training pants, napkin holder, liner, sanitary napkin or the like.
Absorbent article typically comprises an absorbent core, a top flat and an egative film.Absorbent core is usually located between top flat and the egative film.Absorbent core can comprise any absorbing material, this material is normally compressible, suitable shape, non-stimulated to wearer's skin, and can absorb and receiving fluids, as other bodily exudate of urine and some.Absorbent core can comprise multiple liquid absorption material, and these materials are generally used for disposable diaper and other absorbent article, and as the wood pulp of pulverizing, this wood pulp generally is meant airfelt.Other absorbing material embodiment that is suitable for comprises the crape cellulose wadding; Meltblown polymer comprises coforming; Chemicosolidifying, modification or cross-linked cellulosic; Thin paper comprises tissue packaging material and thin paper laminated material; Absorbing foams; Absorb sponge; Super-absorbent polymer; Absorbent gelling material; Or the combination of other any known absorption material or material.Absorbent core 28 also can comprise the non-liquid absorbent materials that (typically is less than 10%) on a small quantity, for example adhesive, wax, wet goods etc.
Absorbent core preferably includes trapping system, and it comprises towards the last trapping layer of wearer's skin with towards the following trapping layer of wearer's clothes.In a kind of embodiment preferred, last trapping layer comprises non-woven material and descends trapping layer to preferably include chemicosolidifying, plying and crimped fibre, the mixture of high surface area fiber and thermoplastic bonding fibers.In another preferred embodiment, two trapping layers all provide with non-woven material, and non-woven material is preferably hydrophilic.Alternatively, one of trapping system or all layers can provide from thin paper according to the present invention.Trapping layer is preferably directly, and the storage layer included with also being absorbed core contacts.
Storing the available core winding material of layer twines.In a preferred embodiment, the core winding material comprises a top layer and a bottom.Core winding material, top layer or bottom can provide from non-woven material.The non-woven material that is preferably the permanent hydrophilic non-woven material and has firm hydrophilic coating specifically.According to the present invention, being used to provide top layer or bottom or the highly preferred alternative material of the two is according to thin paper of the present invention.
Top layer and bottom can provide from two or more independent material piece, or alternatively, they can provide from holistic material piece.A kind of like this material piece of integral body can be twined around storing layer, for example twines so that the C type is folding.
It is found that, use according to thin paper of the present invention to strengthen aridity at the absorbent article on wearer's one side.Not bound by theory, it is believed that this effect is owing to use comprises core, the trapping system dehydration good reason of thin paper according to the present invention as the core winding material.
Claims (16)
1. the thin paper that comprises cellulose fibre
Described thin paper has first and second surfaces,
Described thin paper has embossed pattern,
Described embossed pattern have on described first surface by sunk area around elevated regions, the opposite separately area coincidence on the described second surface of the elevated regions on the described first surface and described thin paper,
Described first surface has elongated fibers
Described elongated fibers has first and second ends,
Described first end is not glued on the described thin paper and described second end is glued on the described thin paper, and the described unconfined end of described elongated fibers obtains by the described first surface of brushing,
Described thus first surface at described elevated regions than the described elongated fibers of lacking 25% at described sunk area as many as.
2. thin paper as claimed in claim 1 is characterised in that described second surface also has elongated fibers.
3. thin paper as claimed in claim 1 is characterised in that,
Described first surface at described elevated regions than the described elongated fibers of lacking 50% at described sunk area as many as.
4. thin paper as claimed in claim 3 is characterised in that,
Described first surface at described elevated regions than the described elongated fibers of lacking 80% at described sunk area as many as.
5. thin paper as claimed in claim 1 is characterised in that,
Described embossed pattern is the micro-embossed pattern that can obtain by the tensile deformation of described thin paper.
6. thin paper as claimed in claim 1 is characterised in that,
Described sunk area forms interconnected network.
7. the paper products such as handkerchief or paper handkerchief for kitchen use or toilet paper are characterised in that,
Described goods comprise one deck thin paper as claimed in claim 1 at least, and the described first surface of the described thin paper of one deck forms the outer surface of described paper products at least.
8. absorbent article, described absorbent article comprises the material of top flat, egative film, absorbent core and winding absorbent core, described absorbent article comprises also that as each described thin paper in the claim 1 to 7 described thin paper preferably is made up of the material that twines described absorbent core.
9. be used to make the method for thin paper as claimed in claim 1,
Described thin paper comprises cellulose fibre,
Described thin paper has first and second surfaces,
Said method comprising the steps of:
-come the described thin paper of embossing by described thin paper being passed the embossing roll gap that forms between two rollers,
The described surface of at least one of the described thin paper of-brushing
Be characterised in that,
After described embossing step, implement described brushing operation.
10. method as claimed in claim 9 is characterised in that,
Described embossing step is not for producing the local thin paper formed micro-embossed step of breaking by described thin paper tensile deformation.
11. method as claimed in claim 9 is characterised in that,
Described brushing operation is used the brushing instrument on described first surface, need not counter-pressure surface is applied on the described second surface of described thin paper.
12. method as claimed in claim 9 is characterised in that,
Described brushing operation is used the brushing instrument on described first surface, and counter-pressure surface need be applied on the described second surface of described thin paper.
13. the described method of claim 12 is characterised in that counter-pressure surface is an anti-roll, and is at the second surface of described thin paper with when described brushing instrument contacts,
The described first surface of described thin paper contacts with described anti-roll, and the described second surface that is to contact the described thin paper of described brushing instrument is a convex.
14. method as claimed in claim 13 is characterised in that, described anti-roll rotates.
15. method as claimed in claim 9 is characterised in that, described thin paper is that the superficial velocity of brushing instrument that move and described is 1.5 to 20 times of superficial velocity of described thin paper.
16. method as claimed in claim 13 is characterised in that, described thin paper is that the superficial velocity of brushing instrument that move and described is 1.5 to 20 times of superficial velocity of described thin paper.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02010577A EP1361308A1 (en) | 2002-05-10 | 2002-05-10 | Embossed tissue having loosened surface fibers and method for its production |
| EP02010577.1 | 2002-05-14 | ||
| EP03009391A EP1365068B1 (en) | 2002-05-10 | 2003-04-25 | Embossed tissue having loosened surface fibers and method for its production |
| EP03009391.8 | 2003-04-25 | ||
| PCT/US2003/014105 WO2003097933A1 (en) | 2002-05-10 | 2003-05-07 | Embossed tissue having loosened surface fibers and method for its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1650067A CN1650067A (en) | 2005-08-03 |
| CN1311130C true CN1311130C (en) | 2007-04-18 |
Family
ID=29404023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038097141A Expired - Fee Related CN1311130C (en) | 2002-05-10 | 2003-05-07 | Embossed tissue having loosened surface fibers and method for its production |
Country Status (12)
| Country | Link |
|---|---|
| US (2) | US20040003905A1 (en) |
| EP (1) | EP1365068B1 (en) |
| JP (1) | JP2005525203A (en) |
| CN (1) | CN1311130C (en) |
| AU (1) | AU2003234495B2 (en) |
| CA (1) | CA2484696C (en) |
| ES (1) | ES2305368T3 (en) |
| HK (1) | HK1084984A1 (en) |
| MX (1) | MXPA04010678A (en) |
| PL (1) | PL371852A1 (en) |
| TW (1) | TW200502464A (en) |
| WO (1) | WO2003097933A1 (en) |
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| US7407560B2 (en) * | 2001-02-16 | 2008-08-05 | The Procter & Gamble Company | Lotioned and embossed tissue paper |
| US20050230069A1 (en) * | 2001-02-16 | 2005-10-20 | Klaus Hilbig | Method of making a thick and smooth embossed tissue |
| US6733866B2 (en) * | 2001-06-15 | 2004-05-11 | Sca Hygiene Products Gmbh | Multi-ply tissue paper product and method for producing same |
| US6863107B2 (en) * | 2001-10-02 | 2005-03-08 | Sca Hygiene Products Gmbh | Device for applying a spot embossing pattern to a web of multi-ply tissue paper |
| ATE393856T1 (en) * | 2001-12-12 | 2008-05-15 | Georgia Pacific France | MULTI-LAYER SHEET OF ABSORBENT PAPER |
| US7182837B2 (en) * | 2002-11-27 | 2007-02-27 | Kimberly-Clark Worldwide, Inc. | Structural printing of absorbent webs |
| US6964726B2 (en) * | 2002-12-26 | 2005-11-15 | Kimberly-Clark Worldwide, Inc. | Absorbent webs including highly textured surface |
| EP1652999B1 (en) * | 2003-07-31 | 2016-04-06 | Nippon Paper Industries Co., Ltd. | Process for producing recycled pulp, method of modifying pulp fiber surface and contaminant, and pulp treating apparatus |
| US20050103456A1 (en) * | 2003-10-24 | 2005-05-19 | Sca Hygiene Products Gmbh | Apparatus and method for embossing a multi-ply paper product |
| US7297226B2 (en) * | 2004-02-11 | 2007-11-20 | Georgia-Pacific Consumer Products Lp | Apparatus and method for degrading a web in the machine direction while preserving cross-machine direction strength |
| DE602006008922D1 (en) * | 2006-07-11 | 2009-10-15 | Procter & Gamble | Multilayered tissue article with a special design of embossed depressions, and with a softening lotion |
-
2003
- 2003-04-25 EP EP03009391A patent/EP1365068B1/en not_active Revoked
- 2003-04-25 ES ES03009391T patent/ES2305368T3/en not_active Expired - Lifetime
- 2003-05-07 CA CA 2484696 patent/CA2484696C/en not_active Expired - Fee Related
- 2003-05-07 JP JP2004505439A patent/JP2005525203A/en active Pending
- 2003-05-07 US US10/430,918 patent/US20040003905A1/en not_active Abandoned
- 2003-05-07 WO PCT/US2003/014105 patent/WO2003097933A1/en active Application Filing
- 2003-05-07 MX MXPA04010678A patent/MXPA04010678A/en active IP Right Grant
- 2003-05-07 CN CNB038097141A patent/CN1311130C/en not_active Expired - Fee Related
- 2003-05-07 AU AU2003234495A patent/AU2003234495B2/en not_active Ceased
- 2003-05-07 PL PL03371852A patent/PL371852A1/en not_active Application Discontinuation
- 2003-05-14 TW TW092113090A patent/TW200502464A/en unknown
-
2006
- 2006-02-03 HK HK06101543A patent/HK1084984A1/en not_active IP Right Cessation
-
2010
- 2010-05-06 US US12/774,829 patent/US20100212848A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5180471A (en) * | 1991-01-09 | 1993-01-19 | Kimberly-Clark Corporation | Non-nesting multi-ply tissue and method for making same |
| US5562805A (en) * | 1994-02-18 | 1996-10-08 | Kimberly-Clark Corporation | Method for making soft high bulk tissue |
| US5702571A (en) * | 1994-02-18 | 1997-12-30 | Kimberly-Clark Worldwide, Inc. | Soft high bulk tissue |
| US5990377A (en) * | 1997-03-21 | 1999-11-23 | Kimberly-Clark Worldwide, Inc. | Dual-zoned absorbent webs |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2484696A1 (en) | 2003-11-27 |
| CN1650067A (en) | 2005-08-03 |
| AU2003234495A1 (en) | 2003-12-02 |
| AU2003234495B2 (en) | 2006-07-27 |
| CA2484696C (en) | 2008-08-05 |
| MXPA04010678A (en) | 2004-12-13 |
| EP1365068A1 (en) | 2003-11-26 |
| TW200502464A (en) | 2005-01-16 |
| PL371852A1 (en) | 2005-06-27 |
| ES2305368T3 (en) | 2008-11-01 |
| HK1084984A1 (en) | 2006-08-11 |
| WO2003097933A1 (en) | 2003-11-27 |
| JP2005525203A (en) | 2005-08-25 |
| US20100212848A1 (en) | 2010-08-26 |
| US20040003905A1 (en) | 2004-01-08 |
| EP1365068B1 (en) | 2008-05-07 |
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