JP2003502515A - Method for producing a nonwoven fabric, a plant for performing the same and a nonwoven fabric thus obtained - Google Patents

Abstract

(57) Abstract: The present invention relates to a method and an apparatus for manufacturing a spunbond type nonwoven fabric, which manufactures a "spunbond" type web (S), and applies one or both surfaces of the web. And conveying at least one sheet (V1 and / or V2) obtained by the card machine and made of discontinuous fibers. The formed composite, after being compressed, is continuously transferred onto a processing unit (10), in which a water acting on the surface of the composite formed by the discontinuous fibers. The composite is bonded by using a jet, whereby the fibers are entangled with each other in the thickness direction while still being on the surface, thereby entangled with the continuous fiber and around the continuous fiber Is formed and dried to obtain a final product.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD OF THE INVENTION

Over the last few decades, proposals have been made to replace conventional woven webs (woven materials and knits) with structures called "nonwovens". Nonwoven fabrics can generally be roughly classified into the following three categories based on the actual manufacturing process. -A category referred to as "wet-formed" non-woven fabrics, manufactured using techniques similar to paper manufacturing. -A category called "dry-formed" non-woven fabrics consisting of discontinuous natural and chemical fibers obtained by paper making machines, fluffing machines and other textile making machines. -A category referred to as "melt-formed" nonwovens, which consist of continuous chemical fibers usually referred to by the generic name "spunbond" (nonwovens made by spinning chemical fibers).

[0002] The present invention relates to an improved process for the production of "spunbond" type non-woven fabrics, and more particularly to manufacturing processes, plants and novel types of products obtained by these means. It is a thing. Such products have appearance, properties such as feel, mechanical properties, and flexibility similar to conventional textiles, especially woven materials.

[0003]

[Prior Art and Problems to be Solved by the Invention]

The production of "spunbond" type non-woven webs is evidenced by earlier references disclosing non-woven fabrics of this type, such as British Patent Application Publication No. 932 482 and US Pat. No. 3,286,896. Like, it goes back decades ago.

Generally, in this type of technology: -extruding the organic polymer melt, or optionally the organic polymer solution, through a holed spinneret, thereby forming a fiber bundle or fiber curtain; The extruded fibers are then oriented by drawing the extruded fibers using one or more devices for forming a fluid jet, in particular for forming a compressed air jet; -finally, generally Collects the fiber bundles in the form of a web on a moving conveyor belt whose movement speed is set according to the properties to be obtained, in particular according to the density, while sucking.

After manufacture, the web is consolidated, generally continuously, preferably by passing it through a sizing or rolling machine at elevated temperatures. This causes the individual fibers to bond to each other.

[0006] Thus, such "spunbond" non-woven fabrics, having very good properties comparable to conventional fabrics, are for example composite substrates such as coating substrates and especially components for making laminates and membranes. It is widely used in many technical fields as a reinforcement member, a pollution prevention layer in civil engineering for various applications as a ground laying, and the like.

On the other hand, the use of non-woven fabrics in the field of application of conventional fabrics, such as clothing, disposable garments, wiping materials, finishing materials, interior fabrics, etc., has not advanced. The reason is that it is bonded by a roll machine (bonding by calendering) to partially thermally bond the fibers together without deteriorating the mechanical properties of the product.
This impairs flexibility, feel and appearance.

In connection with the consolidation of the “spunbond” web, in addition to the processing such as passing through a sizing machine or a rolling machine (calendering) as described above, conventional methods using barbed needles or It is conceivable to subject such webs to a needle punching process by a method using a fluid jet.

[0009] Such treatment may optionally also include an internal reinforcing layer, such as a unidirectional or bidirectional fabric or knit or web of a series or more of parallel or non-parallel yarns. It is frequently used in forming a laminate of discontinuous fibrous webs.

However, at least to the knowledge of the Applicant, the needle punching technique provides "spun" while imparting to the web similar properties to conventional fabrics, especially with regard to properties such as flexibility and feel. It has never been proposed for the purpose of solving the problem of consolidation of the Bond'web monolayer.

When a needlepunching process using barbed needles is applied to a “spunbond” web monolayer, the continuous fibers that make up the web are broken, thereby causing the nonwoven web This is because the mechanical characteristics, which is one of the main advantages of, deteriorates.

As for the use of conventional bonding processes with fluid jets, especially with water jets, such techniques are not applicable. It is well known that in such spunbond webs of continuous fibers it is difficult for the continuous fibers to move relative to each other. As a result, by using such a technique, it is possible to obtain a "spunbond" web equivalent to that obtained by passing it through a roll machine without compromising mechanical properties.
Practically impossible.

[0013]

[Means for Solving the Problems]

It has the same good mechanical properties (tensile strength, tear strength, etc.) as a fully spun and therefore "spunbond" web solidified by high temperature calendering and also of conventional fabrics such as woven fabrics. An improved process has been devised for producing "spunbond" type nonwoven webs having comparable appearance, feel and softness, which forms the subject of the present invention.

Generally speaking, in a method according to the invention for producing a "spunbond" type nonwoven having the same appearance and properties as in the case of conventional fabrics, the continuous fiber bundle is extruded and drawn. Producing a "spunbond" type web by collecting the web on a moving conveyor belt in the form of an unbonded web; -at least one of the "spunbond" webs thus formed; Conveying to one side a sheet of natural and / or artificial and / or synthetic discontinuous fibers obtained by carding machines or other conventional techniques; -the composite thus formed; Compressing by pressing; -using the water jet acting on the surface of the composite of discontinuous fibers, Are continuously transferred onto a processing unit for binding the composite by means of which the fibers are still on the surface but are entangled with each other in the thickness direction, whereby Forming a entanglement around the continuous fiber and the continuous fiber; -performing the drying process; -collecting the final product;

In the present invention, “spunbond” is used prior to performing the water-based bonding operation.
A compression operation is carried out by pressing an assembly consisting of a stack of webs and one discontinuous fiber layer covering it or a stack of "spunbond" webs and a plurality of discontinuous fiber layers sandwiching it. Please note that you will be told.

Such compaction, which can be done by any suitable means, such as a pressure roll among others, is quite different from a calendering operation when done cold. .

In the present invention, a "spunbond" type web can be combined with only one sheet of discontinuous fibers. The sheet of discontinuous fibers was produced upstream of the production area of the "spunbond" web and, after production, onto a conveyor belt where the fibers coming from the "spunbond" plant would have been placed, It can be deposited before the "spunbond" web, which allows the fibers that make up the "spunbond" web to be deposited on the surface of the sheet. Alternatively, a single sheet of discontinuous fibers can be transported downstream from the production area of the "spunbond" web.

In one practical embodiment, a “spunbond” type web is coated on both sides with a sheet of discontinuous fibers. In this case, one sheet is produced upstream of the production area of the "spunbond" web and the other sheet is produced downstream of the production area of the "spunbond" web. Thus, a "spunbond" web of continuous fibers is sandwiched between two sheets of discontinuous fibers.

In that case, the composite consisting of three layers is compressed by pressing and then still continuously, by means of a water jet acting in sequence on the surface of the composite, to form the composite. Delivered to a processing unit for bonding, whereby the fibers are still entangled with each other in the thickness direction while still lying on the surface, whereby they are entangled with and around the continuous fibers. To form.

Furthermore, an additional “texturing” operation can be carried out after the water jet binding operation and before the drying operation (eg EP 059).
608). In this weaving operation, the combined composite is transferred onto a conveyor of coarse weave, and then directly below the conveyor and a perforated rotary drum inside which is an injector for supplying pressurized water. Using a unit with a suction unit arranged,
The water jet from the injector acts on the web to redirect the fibers and removes water by the suction unit.

The invention also relates to a plant in which the method can be carried out continuously. Generally speaking, this plant comprises: -a unit for forming, on a conveyor belt, a "spunbond" type web of continuous fibers; -for at least one side of the manufactured "spunbond" web. , At least one carding machine or other equivalent system for producing and conveying sheets of discontinuous fibers; -means for pressing the formed composite; -coated by discontinuous fibers A fluid jet is exerted on at least one face, whereby the fibers are still laid on the surface but are entangled with each other in the thickness direction, whereby the continuous fibers and to the periphery of the continuous fibers. Water jet bonding treatment means for forming the entanglement; -drying means; -the bonded webs Means for collecting; a, are provided in series.

Additionally, such a plant comprises a weaving unit between the water jet bonding treatment means and the drying means.

Compared to the “spunbond” webs produced by conventional methods, the product obtained according to the invention is formed by combining discontinuous fibers with a web formed from continuous fibers. The fibers coat the web based on continuous fibers and penetrate the interior of the web by forming bonds around the fibers.

Such products according to the invention retain all the mechanical strength properties of conventional spunbond webs which have been bonded by a calendering process. The products obtained according to the invention also have properties comparable to conventional textiles, for example in terms of properties such as feel, softness and appearance.

The discontinuous fibers associated with the spunbond web may be any type of fiber, such as natural fibers, chemical fibers, hydrophilic fibers or hydrophobic fibers, depending on the application of the product. Note that you can. The length of such a fiber is 5 mm to 60 mm, and the thickness is 0.8 d.
tex to 6.6 dtex.

The density of the discontinuous fiber sheet combined with the spunbond web can vary depending on the application. However, advantageously 10 g / m ²
˜50 g / m ² . A sheet having a density of less than 10 g / m ² cannot be properly bonded to the spunbond web and, conversely, has a density of 50 or less.
Sheets larger than g / m ² reduce the economic benefits of the process.

[0027]

DETAILED DESCRIPTION OF THE INVENTION

The invention and the advantages gained by the invention will be more clearly understood from the following description with reference to the accompanying drawings.

As shown in the accompanying drawings, the present invention relates to a method and plant capable of continuously producing a novel type of "spunbond" web of continuous synthetic fibers. Such webs not only have mechanical strength properties (stretch, tensile strength, tear strength, etc.) comparable to conventional "spunbond" webs consolidated by high temperature calendering, but also for example woven fabrics. It can exhibit the same appearance, feel and flexibility as those of conventional woven fabrics.

In the present invention, a “spunbond” type non-woven web generally has the code (
Manufactured using a conventional technique of extruding an organic polymer melt through a holed spinneret (2), thereby forming a fiber bundle or fiber curtain (3) in a plant such as that shown in 1). It

After cooling, at least the surface of the extruded fibers (3) will be solidified, the extruded fibers are stretched and oriented by using one or more fluid jet devices (4). Upon exiting the fluid jet device, the extruded fibers deposit on the collecting surface in the form of a web (S).

In the present invention, the “spunbond” web (S) thus formed
To give the web its cohesive strength and strong mechanical properties such as tensile and tear strengths, amongst other things, as well as the appearance, feel and flexibility of conventional fabrics. "Spunbond" web (S
) Is not directly on the surface of the conveyor belt (5) on which the suction is taking place,
It may be a natural fiber, an artificial fiber or a synthetic fiber and is collected on a sheet (V1) of discontinuous fibers produced immediately before the "spunbond" plant (1).

This sheet (V1) is manufactured, for example, using a conventional unit (6) which is a combination of a card web spreading unit and a card machine. The produced sheet (V1) is fed by a feeding unit consisting of a conveyor belt (7).
It is transported onto the conveyor belt (5) of the "spunbond" plant.

The two textile layers (V1, S) superposed on one another are then held on a conveyor belt (5) while being able to compress both layers, for example a first unit (eg two rollers). Pass 8).

A second sheet (V2) of discontinuous fibers is produced on a surface of the spunbond web (S), produced by a second unit (9), for example a card machine or similar machine. It Three individual fabric layers (V1, S, V) superimposed on each other
2) is compressed again by being pressed between the two rollers (8).

The compressed assembly is then, and still continuously, processed by a processing unit illustrated in detail in FIG. 2 and indicated generally by the numeral (10). The processing unit (10) performs a binding process on the composite (ie, the compressed assembly) by using a plurality of water jets that act sequentially on both sides of the composite. It is for.

In this embodiment, the treatment unit (10) is a water-based coupling unit of the type “Jetlace 2000” sold by the Applicant. In this regard, the applicant's French patent application published specification 2 730 246 (US patent specification 5,718,022) and French patent application published specification 2 734.
No. 285 (US Pat. No. 5,768,756).

Such a coupling unit essentially comprises a conveyor (11). Along this conveyor is conveyed a fiber structure consisting of three layers (V1, S, V2) superposed on one another.

The structure is then compressed between the conveyor (11) and the first suction roll (12), as clearly shown in FIG. The first suction roll (12) is preferably covered by a microperforated jacket with randomly arranged holes as disclosed in FR-A-2 734 285. .

In another embodiment, the roll (12) is covered by a metal wire mesh.

Additionally, in the compression region between the surface formed by the conveyor (11) and the surface formed by the rolls (12), the composite web (V) represented by the symbol (N) in the following description.
For 1 / S / V2), the first wetting process can be performed by using the spray rail (13) illustrated by the dashed line in FIG. In this case, the spray rails (13) supply a water curtain which passes through the conveyor belt (11) and further through the composite web.

[0041]   However, such a wetting operation is not essential.

The compressed composite is then subjected to the action of the water jet from the injector (14) while being supported by the suction drum (12). This water jet acts on the surface made of the fiber sheet (V1) to entangle the constituent fibers of the fiber sheet (V1).

The spray rails or injectors (14) arranged parallel to the normal of the roll (12) are conventional spray rails used to produce water jets or needles with diameters of 100-170 μm. Is. The water jets are arranged at a distance of 0.5-2.2 mm from one another and the feed pressure is between 50 and 150 bar, depending on the density of the composite.

In addition, on this first roll (12) it is also possible to use further injectors for further jet treatment.

After leaving this roll (12), the treated composite is treated with a second roll (15).
) Contact the surface of. The second roll (15) is of the same type as the first suction roll (11), and one or two sets of injectors (16, 17) are installed on this second roll. . These injectors are
Out of N), the water jet acting on the surface formed by the sheet (V2) is emitted.

In this second solidification treatment, the rails (16, 17) are 100 to 170 μm.
To produce a water jet or water needle with a diameter of. The water jets are arranged apart from each other by a distance of 0.5 to 2.4 mm,
The supply pressure is 50 to 400 bar.

In this case, the fibers of the sheet (V2) are entangled with each other within the thickness of the web (N) by the action of the injectors (16, 17). These fibers surround and bond to the continuous fibers.

After exiting this unit, the spunbond web, illustrated by reference numeral (18), can be transferred directly to the drying unit (19), where conventional heating is performed in the drying unit (19). After passing through the drum (26) it is collected.

Additionally, as shown in FIGS. 1 and 2, a third suction drum (20).
Can be used to perform a third water-based binding process. 3rd suction drum (
20) is provided with a set of injectors (21), and a jet from the injectors acts on a surface formed by the sheet (V1).

After this third processing, complementary processing can be additionally performed. In such a process, a "spunbond" web (18), as illustrated in detail in FIG. 2, is placed on a unit manufactured, for example, as disclosed in EP 059 608. And transfer.

Generally, such a unit comprises a wire transport mesh (22) of the “fourdrinier” type used in the papermaking industry. Spunbond (18
) Is subjected to a series of water jets obtained by using rails (23) held on this wire mesh while injecting a water curtain towards the inner surface of the perforated rotating drum (24). These water jets reorient the fibers.

The suction unit (25) for removing water is, of course, a conveyor (
It is installed directly under 22).

The plant described above makes it possible to produce a composite of two sheets of discontinuous fibers combined with a “spunbond” type non-woven fabric by using all the means described above. Alternatively, for a "spunbond" type web, a single sheet of discontinuous fiber may be provided by feeding a sheet of discontinuous fiber to one of the upstream and downstream sides of the formation region of the "spunbond" web. Composites can be produced that combine sheets.

Experimental Example 1 This experimental example illustrates the production of a composite in which a "spunbond" web is interposed between two sheets of discontinuous fibers.

[0055]   Such a product was manufactured according to the present invention as follows.

It has a density of 30 g / m ² and a thickness of 1.7 dtex × length of 38 mm.
Fiber sheet (V1) consisting of 100% viscous fiber of
6) was used.

[0057]   The sheet was produced at a speed of 100 m / min.

After being discharged from the card machine (6), the sheet (V1) is transferred onto a receiving belt (5) of a plant (1) for producing a “spunbond” type web (S). It was

A “spunbond” web was produced from polypropylene and the produced “spunbond” web was spread on a sheet (V1). This gives a density of 40g
/ M ² web having a fiber of 1.7 dtex is formed.

The two layers (V1, S) superposed on one another are then compressed using the pressure roller unit (8). Then, a second fiber sheet (V2) produced in the same manner as sheet (V1) with a density of 30 g / m ² is fed onto the surface of the “spunbond” web (S). The three individual layers (V1, S, V2) superposed on one another are then subjected to a further compression treatment by a further pressure roller unit.

The complex so formed was then sold by the Applicant in “Jetlace
A treatment unit with a water-based coupling unit of the type 2000 "(1
In 0), it was processed continuously.

Such a unit basically comprises a conveyor belt (11) and three jet treatment units each having suction rolls (12, 15, 20). Here, each roll has a diameter of 516 mm and is covered by a microperforated jacket in which a plurality of holes are randomly arranged as disclosed in French Patent Application Publication No. 2 734 285. ing. Injector rails (14, 16, 17, 21) are installed on these suction drums (12, 15, 20), and these injector rails are seat (V1), spunbond (S), and seat (V2). It acts on the surface of the complex (N) consisting of.

The injectors are arranged such that they can sequentially act on both surfaces of the composite (N).

The rails (14, 16, 17, 21) formed 1666 jets per meter and were controlled as in the table below.

[Table 1]

Downstream of the last water-based binding unit (20) is arranged a weaving unit consisting of a conveyor belt (22) formed in the form of a polyester wire mesh which is installed in the actual weaving unit. There is. This unit is equipped with a perforated rotary drum (24). An injector (23) forming a water jet with 150 bar is arranged in this drum.

The injector (23) formed a water jet with a diameter of 130 μm, which caused the fibers to be reoriented. Water from the injector (23) was collected by a suction system (25) installed just below the conveyor (22).

By performing the above method under the above conditions, a web according to the present invention was obtained from the plant. The web had a density of 95 g / m ² after drying on a heated drum.

The web is perfectly and well bonded, flexible, pleasant to the touch,
It had good appearance and, in addition, had comparable mechanical properties as compared to a conventional woven fabric of comparable density obtained using the same type of fiber.

EXPERIMENTAL EXAMPLE 2 This experimental example involved the production of a structure in which a "spunbond" web was combined with a single fiber sheet formed upstream of the formation area of the "spunbond" web. 1 illustrates the implementation of the method according to the invention.

[0070]   According to the invention, the method according to the invention was carried out as follows.

It has a density of 20 g / m ² and a thickness of 1.7 dtex × length of 38 mm.
Fiber sheet (V1) consisting of 100% viscous fiber of
6) was used.

[0072]   The sheet was produced at a speed of 150 m / min.

After being discharged from the card machine (6), the sheet (V1) was transferred onto the receiving belt (5) of the spunbond unit.

A spunbond web (S) consisting of polypropylene fibers was deposited on the sheet (V1).

The 25 g / m ² density spunbond web has ² dtex of fibers.

The two layers (V1, S) superposed on each other were then compressed using a pressure roller (8), which formed a composite with a density of 45 g / m ² . This complex was then transferred continuously onto a water-based binding unit (10) of the type “Jetlace 2000” sold by the Applicant.

This unit comprises a conveyor belt (11) and suction rolls (12, 1) respectively.
5) with two water jet processing units and a final conveyor (22). A patterning / texturing device is arranged on the conveyor (22).

The two rolls (12, 15) are described in French patent application FR 2 734 285.
It is covered by a microperforated jacket in which a plurality of holes are arranged randomly as disclosed in No.

Injector rails (14, 16, 17) are installed on these rolls.

The injectors are arranged so that they can sequentially act on both surfaces of the composite.

The injector formed 1666 water jets having a diameter of 120 μm per 1 m. The water pressures of these injectors are 60, 80 and 110b, respectively.
was ar.

Weaving of the bonded composite on the immediately preceding roll was carried out by means of a perforated rotating drum (24) as described in the first experimental example. The injector in this drum supplies the water jet with a water pressure of 80 bar.

The final product after drying had a density of 45 g / m ^{2 and} superior mechanical properties to spunlaced webs of the same type of fiber.

The appearance and flexibility of the web is important. The appearance and flexibility of the resulting webs were significantly better than polypropylene and polyester of the same density bonded by calendering.

[Brief description of drawings]

1 is a side view showing an entire production line for carrying out the method according to the present invention.

FIG. 2 is a side view showing in more detail how a bonding operation is performed using a water jet and an additional additive textile treatment.

[Explanation of symbols]

  1 Spunbond forming plant   5 Conveyor belt   6 card machine   9 card machine 10 Processing unit (water jet coupling processing means) 11 conveyor belt 19 Drying unit (drying means) 22 mesh, conveyor (coarse woven) 23 injectors 24 hole rotary drum 25 suction unit S "Spunbond" type web Sheet made of V1 discontinuous fiber Sheet made of V2 discontinuous fiber

[Procedure for Amendment] Submission for translation of Article 34 Amendment of Patent Cooperation Treaty

[Submission date] June 11, 2001 (2001.6.11)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Contents of correction]

[Claims]

4. A plant for the production of "spunbond" type non-woven fabrics, for forming a "spunbond" type web (S) of continuous fibers on a conveyor belt (5). unit (1); - for at least one surface of the manufactured "spunbond" web had a density of Risarani 10g / m ² ~50g / m ^2, such a discontinuous fiber sheet (
At least one carding machine (6 and / or 9 ) for producing and transporting V1 and / or V2);-means for cold pressing the formed composite; -by said discontinuous fibers A fluid jet is exerted on at least one face being coated, whereby the fibers are still located on the surface but are entangled with each other in the thickness direction, whereby with respect to the continuous fibers. and the water-jet bonded processing means for forming entanglements in the vicinity of the continuous fibers (10); - a drying unit; - means for collecting the combined said web; a, provided in series, between the water-jet coupling the processing means (10) said drying means, comprises a fabric of unit, the fabric of units, coupled the Coarse fabric (2 2) for supporting the coalescence, a perforated rotating drum injector for supplying pressurized water (23) is arranged inside, arranged suction unit immediately below the fabric (22) and (25), provided with, characterized in that said water jet from the injector causes reorient the fibers each other I'll be allowed to act on the web, so as to remove water by the suction unit And the plant.

5. A plant according to claim 4, upstream and downstream of the production area of the "spunbond" web comprises means (6,9) for producing the fiber sheet, the upstream side The sheet (V1) produced is deposited on a conveyor belt (5) of a "spunbond" plant, prior to the "spunbond" web, thereby being extruded and further stretched to form. The fiber bundles forming the "spunbond" web are intended to be directly deposited on the surface of the sheet (V1), and the other sheet (V2) is the "spunbond" web. A plant characterized in that it is manufactured downstream of the manufacturing area, so that it is deposited on the surface of the "spunbond" web.

6. A non-woven fabric obtained by the method according to any one of claims 1 to 3 , which is formed by combining discontinuous fibers with a web formed of continuous fibers. A non-woven fabric characterized in that the fiber covers at least one surface of the continuous fiber-based web and penetrates into the inside of the web by forming a bond around the fiber. .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Contents of correction]

Generally speaking, in a method according to the invention for producing a "spunbond" type nonwoven having the same appearance and properties as in the case of conventional fabrics, the continuous fiber bundle is extruded and drawn. Producing a "spunbond" type web by collecting the web on a moving conveyor belt in the form of an unbonded web; -at least one of the "spunbond" webs thus formed; One of the to the plane, of both natural result obtained carding machine and / or artificial and /
Or conveys the sheet having a density of Risarani 10g / m ² ~50g / m ^2, such a discontinuous fiber synthesis; - the so-formed complex was compressed by pressing; - complexes Is continuously transferred onto a processing unit for combining the composites by using a water jet of the composites that acts on the surface of the discontinuous fibers to thereby bond the fibers together. Still laying on the surface but intertwined with each other in the thickness direction, thereby forming an intertwining with and around the continuous fiber; -drying treatment; -collecting the final product; Each operation is performed continuously.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Contents of correction]

The invention also relates to a plant in which the method can be carried out continuously. Generally speaking, this plant comprises: -a unit for forming, on a conveyor belt, a "spunbond" type web of continuous fibers; -for at least one side of the manufactured "spunbond" web. at least one card for conveying to produce sheets having a density of Risarani 10g / m ² ~50g / m ^2, such a discontinuous fiber unit and; - means for pressing the complex formed And-acting a fluid jet on at least one face covered by the discontinuous fibers, whereby the fibers still lie on the surface but are intertwined with each other in the thickness direction, whereby Water jet bonding treatment means for forming entanglement with and around the continuous fibers; -drying means -Means for collecting the combined webs;

─────────────────────────────────────────────────── ─── Continued front page    (81) Designated countries EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, I T, LU, MC, NL, PT, SE), OA (BF, BJ , CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, K E, LS, MW, MZ, SD, SL, SZ, TZ, UG , ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, C H, CN, CR, CU, CZ, DE, DK, DM, DZ , EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, K G, KP, KR, KZ, LC, LK, LR, LS, LT , LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, S D, SE, SG, SI, SK, SL, TJ, TM, TR , TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW

Claims (8)

[Claims] 1. A method for producing a "spunbond" type non-woven fabric having the same appearance and properties as those of conventional woven fabrics, comprising the steps of: extruding and stretching continuous fiber bundles; Producing a "spunbond" type web (5) and collecting this web on a moving conveyor belt in the form of an unbonded web; -at least one of the "spunbond" webs thus formed; Conveying to the face a sheet (V1 and / or V2) obtained by card machines or other conventional techniques and consisting of natural and / or artificial and / or synthetic discontinuous fibers; Compressing the formed composite by pressing; -composing the composite on a surface of the composite that acts on the surface of the discontinuous fiber. To transfer the composites continuously onto a processing unit (10) for binding, whereby the fibers still lie on the surface but are entangled with each other in the thickness direction. A process for forming entanglement with and around the continuous fiber; -performing a drying treatment; -collecting a final product; 2. A method according to claim 1, wherein both sides of said "spunbond" type web (5) are coated with a sheet (V1 / V2) of discontinuous fibers, one sheet in this case. (V1) was produced on the upstream side of the production area of the “spunbond” web, and after production, on the conveyor belt (11) on which the fibers coming from the “spunbond” plant would have been placed. To the above
The spunbond web is deposited before the fibers forming the "spunbond" web are deposited on the surface of this sheet (V1) and yet the other sheet (V2). , Transporting the “spunbond” web downstream of the production area, thereby interposing the “spunbond” web between the two fiber layers (V1, V2), A composite formed in accordance with claim 1 for compressing by pressing and then, still continuously, for bonding the composite by using a water jet acting sequentially on the surface of the composite. The fibers are conveyed to the processing unit (10), whereby the fibers are still located on the surface but are entangled with each other in the thickness direction, whereby the fibers are connected to each other. Wherein the forming the entanglement at the periphery of and the continuous fibers to the fiber. 3. The method according to claim 1, wherein an additional “texturing” operation is performed after the water jet binding operation and before the drying operation. Method. 4. The method according to claim 3, wherein in the weaving operation, an injector (23) for transferring the combined composite onto a coarse fabric (22) and then supplying pressurized water. ) Inside the perforated rotary drum (24) and a suction unit (25) located directly below the fabric (22) is used to provide a water jet from the injector. Reorienting the fibers by acting on a web and removing water by the suction unit. 5. A plant for the production of "spunbond" type non-woven fabrics, for forming a "spunbond" type web (S) of continuous fibers on a conveyor belt (5). Unit (1); and-at least one carding machine for producing and conveying sheets (V1 and / or V2) of discontinuous fibers to at least one side of the produced "spunbond" web. (6 and / or 9) or other equivalent system; -means for pressing the formed composite; -acting a fluid jet on at least one face covered by said discontinuous fibers , Thereby entwining the fibers with each other in the thickness direction while still being positioned on the surface, whereby the continuous fibers are And water jet bonding treatment means (10) for forming an entanglement around the continuous fibers; -drying means; -means for collecting the bonded webs; A plant that is characterized by 6. The plant according to claim 5, further comprising a weaving unit between the water jet joining processing means (10) and the drying means, wherein the weaving unit is joined to the composite. Coarse woven fabrics for supporting
2), a perforated rotary drum inside which an injector (23) for supplying pressurized water is arranged, and a suction unit (25 arranged immediately below the fabric (22).
) And, the water jet from the injector is applied to the web to re-orient the fibers, and the suction unit removes water. 7. Plant according to claim 5 or 6, characterized in that it comprises means (6, 9) for producing fiber sheets upstream and downstream of the production area of the "spunbond" web, The sheet (V1) produced on the side is deposited on the conveyor belt (5) of the "spunbond" plant, before the "spunbond" web, whereby it is extruded and further stretched. The fiber bundles forming the "spunbond" web are directly deposited on the surface of this sheet (V1), and the other sheet (V2) is the "spunbond". A plan characterized in that it is manufactured downstream of the manufacturing area of the web, so that it is deposited on the surface of the "spunbond" web. To. 8. A non-woven fabric obtained by the method according to any one of claims 1 to 5, which is formed by combining a discontinuous fiber with a web formed of continuous fibers. A non-woven fabric characterized in that the fiber covers at least one surface of the continuous fiber-based web and penetrates into the inside of the web by forming a bond around the fiber. .