JPH09324338A - Multiple woven fabric having hooking function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a multiple woven fabric less apt to shift on a seat even if subjected to repeated detachment from/attachment to a Hook-and-Loop member bearing a hooking element or even after used for a long period as a facing material for seat without impairing its surface designability. SOLUTION: This multiple woven fabric contains looped air-interlaced yarns as wefts or warps comprising filaments each having a single fiber fineness of >=3 denier and satisfying the relationships (1) and (2), so as to satisfy the relationship (3), with the air-interlaced yarns appearing only on one side of the fabric: [relationship (1): 5<=(DT×DE/2)<1/2> ; relationship (2): DE<=35; relationship (3): CF>=25 (DT is filament breaking tenacity (g/d); DE is filament elongation at break (%); CF is the rate of area of the air-interlaced yarns appearing on one side of this fabric (%)].

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer material suitable for various seat sheets such as seat seat upholstery for vehicles such as vehicles, ships and aircrafts, office upholstery upholstery, home upholstery upholstery. Regarding textiles.

[0002]

2. Description of the Related Art Conventionally, as a skin material for a vehicle seat upholstery, an office chair upholstery or the like, various fabrics which can be engaged with a base body having an engaging element group such as a hook are known. Conventional skin materials have an engaging function by laminating or sewing a nonwoven fabric or a tricot material having a loop shape on the back surface.

[0003]

Although such a conventional upholstery skin material can provide a certain degree of satisfaction in formability and feeling of use, it is necessary to use a material having a loop function with respect to the skin material as described above. It has to be integrated by lamination or the like, which has led to an increase in the cost of the skin material. In addition, before laminating a nonwoven fabric or the like on the back surface of the skin material, a cushioning property may be imparted to the skin material, or a urethane foam resin or the like may be laminated to secure shape stability during sewing. In addition to this, the cost was further increased.

A conventional skin material having such a laminated structure is:
Since it is composed of heterogeneous materials, it is necessary to separate and separate each material at the time of recycling, and simple recycling is difficult. Therefore, at present, it is landfilled as shredder dust.

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional skin material, and it is not necessary to subject the cloth used as the skin material to complicated processing such as laminating and the like. An object of the present invention is to provide a multiple woven fabric having an engaging function surface having an excellent engaging force with an engaging element group on the opposite surface. Furthermore, the present invention prevents the skin material from slipping on the seat sheet even after being repeatedly attached to and detached from a surface fastener member having a hook-shaped engaging element or used as a seat skin material for a long time, and the surface of the skin material can be prevented. It is an object of the present invention to provide an excellent multi-layered woven fabric which does not impair the designability.

[0006]

That is, according to the present invention, a single yarn denier is 3 denier or more and an air entangled yarn having a loop composed of filaments satisfying the following formulas (1) and (2) is used as a warp yarn or a weft yarn. Is a multi-woven fabric having an engaging function, characterized in that the entangled yarn appears only on one side of the woven fabric. 5 ≦ (DT × DE / 2) ^1/2 (1) DE ≦ 35 (2) CF ≧ 25 (3) where DT is the breaking strength (g / d) of the filament,
DE represents the breaking elongation (%) of the filament, and CF represents the area ratio (%) of the air entangled yarn appearing on one surface of the woven fabric on that surface. Furthermore, the present invention is a vehicle seat in which the above-mentioned multi-layered fabric is engaged with a group of engaging elements fixed to a seat base material.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In order to sufficiently engage with a group of engaging elements of a surface fastener, a back surface (engagement function surface) of a multiple woven fabric is required.
In addition, it is important that the loop of the air entangled yarn exists in a specific state, and it is important that the filament constituting the loop satisfies the above requirements.

When the single yarn denier of the filament forming the loop is less than 3 denier, it is difficult to obtain a sufficient engaging strength in the engagement with the engaging element group of the surface fastener, and the filament is repeatedly detached from the engaging element. It becomes easy to cut. Therefore, if such inconvenience does not appear significantly,
It does not matter even if some filaments having a single yarn denier of less than 3 denier are mixed in the multifilament. Further, if the single yarn denier is too thick, the engagement with the engaging element will be poor, so preferably 20 denier or less,
More preferably 15 denier or less, and further preferably 1
It is 2 denier or less. If the above formula (1) is not satisfied, sufficient engagement strength cannot be expected even if the filament single yarn denier is 3 denier or more.
When the above formula (2) is not satisfied, the filaments forming the loops are stretched by the external stress (displacement stress, tensile stress, etc.) applied to the skin material after engagement, and the skin material is gradually displaced on the seat. The aesthetics are deteriorated, and the engagement and disengagement is deteriorated if the attachment / detachment is repeated to reattach the skin material, which is not preferable.

Here, the air entangled yarn is obtained by introducing the above multifilament for side yarn and another multifilament into a nozzle for entanglement, and ejecting air into the nozzle to mix and entangle these multifilaments. It is a thread.
Increasing the overfeed increases both the size and amount of loop fluff. These loop fluffs are constrained due to air entanglement at the ends of the loops, and are suitable for engaging with hooks of a surface fastener.

The condition of air confounding is expressed by the following equation (4).
It is important to satisfy (5). If the side yarn overfeed is less than 50%, the size and amount of loop fluff will be insufficient, and there will be less loop fluff on the surface of the engagement function surface when engaging with the hook surface of the surface fastener, so sufficient engagement is achieved. I can't get strong. Also, the air pressure during air confounding is 1.
If it is less than 5 kg / cm ² , the entanglement becomes insufficient and the ends of the loop fluff become free, or the loop fluff does not form. OF ≧ 50 (4) AP ≧ 1.5 (5) [where OF is side yarn overfeed (%), AP
Indicates the air pressure (kg / cm ² ) during air confounding. ]

The core yarn constituting the air entangled yarn is not particularly limited in terms of strength and elongation and single yarn denier, but if the single yarn denier is too large, the entangled portion during the entanglement process is difficult to form and is entangled. However, since the entangled portion is easily broken by detachment from the engaging element, in order to obtain stronger entanglement, a single yarn that does not exceed the single yarn denier (3 denier or more) of the filaments forming the side yarn by 3 denier or more. It is preferred to use denier filaments for the core yarn. Also, the overfeed rate of the core yarn is not particularly limited,
It is preferable to set the difference from the overfeed rate of the side thread to 50 to 100% because a loop having good engagement with the engagement element is formed.

The height of the loop formed in the air entangled yarn obtained under such conditions is preferably about 1 to 3 mm from the viewpoint of the engaging property with the engaging element. The number of loops should not be too large. If the number of loops is large, the loop density is high, so that an engaging element having a size as described later is less likely to be caught in the loops, which may rather reduce the bondability. Further, since the entangled yarn having many loops has a significantly reduced warpability and weavability, it is also disadvantageous in the cost of yarn production.
As for the number of loops, the number of loops having the above loop height is 200 or less / 10 cm, and particularly 100 or less / 10 c
It is desirable that m exist. The multiple woven fabric of the present invention is a wide woven fabric used as a skin material for a seat, and it is important to impart an engaging function to the entire woven fabric as uniformly as possible. For that purpose, one of the features of the present invention is to use an air entangled yarn in which the number of loops is appropriately suppressed as described above, and to increase the number of threads to be driven to some extent.

Further, the air entangled yarn engaged with the hook of the hook-and-loop fastener is applied with tension due to external stress,
The presence of these air entangled yarns on the use surface causes deformation of the use surface, so it is important to weave the air entangled yarns so that they appear only on the engagement function surface, and moreover, stress on the use surface causes It is important to make multiple woven fabrics so as not to cause deformation. The multi-woven fabric of the present invention having such a structure is woven so that the air entangled yarn is always under the other yarns when viewed from the use side. For example, in the weft double weave as shown in FIG. 1, the yarns used for the weft yarns 2, 4, 6, 8 and 10 do not appear on the use surface due to the warp yarns and the weft yarns 1, 3, 5, 7 and 9. Further, the wefts 1, 3, 5, 7, and 9 do not appear on the engagement function surface. Then, the air entangled yarn is woven so as to appear as much as possible on the engagement function surface side. Further, in the present invention, it is important that the air entangled yarn be a warp yarn or a weft yarn of the multiple woven fabric and satisfy the above formula (3). If the CF value is less than 25, sufficient engagement with the engagement element cannot be achieved. There is no upper limit, but the CF value is 9 in both warp and weft.
0 or less is preferable. The air entangled yarn may be used for either the warp or the weft, but is preferably used for the weft in terms of warpability, weavability and the like.

The loop having an engaging function, which appears on one surface of the multiple woven fabric of the present invention, is capable of engaging with engaging elements of various shapes. Specific shapes of the engaging elements are, for example, , Barbed, 2-step barbed, barbed with ribs, hooked,
Although a multi-step hook shape or the like can be released, a bar-shaped engaging element such as a bar-shaped, two-level bar-shaped, ribbed or bar-shaped type is preferable from the viewpoint of engagement. As an engagement element having such a shape, for example, a KM fastener rail (manufactured by Kuraray Co., Ltd.) can be mentioned. Further, the size of the engaging element is 1
.About.3 mm, the maximum width of the barbed portion is 0.7 to ² mm, and the device density is preferably 40 to 300 pieces / cm.sup.2. The multiple woven fabric of the present invention has an engagement strength of 1.3 kg / cm ² (shear strength) or more, and 800 when engaged with a substrate having an engagement element.
g / cm (peel strength) or more, it has an excellent engagement property, so the skin material does not shift due to various stresses acting on the skin material during use after engagement, and it can adhere to the surface even if it is repeatedly attached and detached. There is a merit that there is no influence.

[0015]

EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples.
Each physical property described in the examples is a value measured by the following method. [Loop height] The side of the yarn is enlarged to show the distance from the center of the yarn to the loop as shown in FIG. [Number of loops] The loop height is 1 to 3 mm as shown in FIG.
The number of loops was shown by the number per 10 cm of yarn length.
In the figure, a is counted as a loop, and b is not counted. However, when counting, a loop shape such as a c in the figure in which a plurality of filaments are gathered with a width of 0.5 mm is counted as one loop. [Area ratio of air entangled yarn appearing on the front surface (back surface)]
Draw a 10 cm square frame on the surface of the dough and take a picture (enlarged picture if necessary) so that this frame will fit. In this photograph, the area occupied by the air entangled yarn was measured and expressed as a ratio (%) to the total area in the frame. [Breaking strength, breaking elongation] Measured according to JIS L-1017. [Engagement strength] Measured according to JIS L-3416. As the hook surface of the hook-and-loop fastener, the shape of the engaging element is a two-step edging shape, the engaging element density is 44 pieces / cm ² , the element height is about 1.5 mm, the element thickness is about 0.6 mm, and the maximum edging width is 1 mm. KM fastener rail X6320-3 (made by Kuraray) was used. [Overfeed rate] Indicates the amount of yarn to be air-entangled. When the winding speed of the air-entangled yarn is V0 and the supply speed of the yarn to be air-entangled is V1, the overfeed OF of the air-entangled yarn is expressed by the following equation. OF = (V1-V0) / V0

Example 1 A multifilament of 150 denier 48 filaments was used as a core yarn, was supplied to a nozzle with an overfeed of 10%, and a side yarn was a multifilament of 75 denier 24 filaments (DT 3.5 g / d, DE 23%). )
Two of them are supplied to the nozzle with an overfeed of 70% and entangled at an air pressure of 3 kg / cm ² to produce an air entangled yarn (T
L1) was obtained. The loop height of the obtained entangled yarn is 1 to
The number of loops of 3 mm was 82/10 cm. FIG.
Weaving was carried out using the yarn of Table 1 and the yarn of Table 1 to obtain a multiple woven fabric. In the obtained fabric, the air entangled yarn did not appear on the use surface, and the air entangled yarn appeared only on the engagement function surface. The engaging strength of the fabric was as shown in Table 2. The fabric had a sufficient engaging strength, and had no effect on the peeling of the surface in use.

Comparative Example 1 A multifilament of 150 denier 48 filaments was used as a core yarn, was supplied to a nozzle with an overfeed of 10%, and a side yarn was a multifilament of 75 denier 36 filaments (DT 3.4 g / d, DE 24%. )
Two of them are supplied to the nozzle with an overfeed of 70% and entangled at an air pressure of 3 kg / cm ² to produce an air entangled yarn (T
L2) was obtained. The loop height of the obtained entangled yarn is 1 to
The number of loops of 3 mm was 73/10 cm. FIG.
Weaving was carried out using the yarn of Table 1 and the yarn of Table 1 to obtain a multiple woven fabric. In the obtained fabric, the air entangled yarn did not appear on the use surface, and the knit yarn appeared only on the engagement function side. The engagement strength of the fabric is as shown in Table 2, and the engagement strength of the fabric is insufficient. Met.

Comparative Example 2 A multifilament of 150 denier 48 filaments was used as a core yarn and was supplied to a nozzle with an overfeed of 10%, and a side yarn of a multifilament of 75 denier 24 filaments (DT 3.5 g / d, DE 23%). )
Two of them are supplied to the nozzle at an overfeed of 30% and are entangled at an air pressure of 3 kg / cm ² to produce an air entangled yarn (T
L3) was obtained. The loop height of the obtained entangled yarn is 1 to
The number of loops of 3 mm was 42/10 cm. FIG.
Weaving was carried out using the yarn of Table 1 and the yarn of Table 1 to obtain a multiple woven fabric. In the obtained fabric, the air entangled yarn did not appear on the use surface, and the air entangled yarn appeared only on the engaging function surface, but the loop fluff was insufficient and the hook did not sufficiently engage with the hook of the surface fastener.

Comparative Example 3 A multifilament of 150 denier 48 filaments was used as a core yarn and was supplied to a nozzle with an overfeed of 10%, and a side yarn of a multifilament of 75 denier 24 filaments (DT 3.5 g / d, DE 23%). )
Two of them are supplied to the nozzle with an overfeed of 70% and are entangled at an air pressure of 1 kg / cm ² to produce an air entangled yarn (T
L4) was obtained. The loop height of the obtained entangled yarn is 1 to
The number of loops of 3 mm was 91/10 cm. FIG.
Weaving was carried out using the yarn of Table 1 and the yarn of Table 1 to obtain a multiple woven fabric. In the obtained fabric, the air entangled yarn did not appear on the use surface, and the air entangled yarn appeared only on the engaging function surface, but since the end of the loop fluff is easily moved freely, it engages with the hook of the hook-and-loop fastener. After that, the fabric became easy to move and was not suitable as an engaging function.

Comparative Example 4 A multifilament of 150 denier 48 filaments was used as a core yarn, which was supplied to a nozzle with an overfeed of 10%, and a side yarn of a multifilament of 75 denier 24 filaments (DT 3.5 g / d, DE 23%). )
Two of them are supplied to the nozzle with an overfeed of 70% and entangled at an air pressure of 3 kg / cm ² to produce an air entangled yarn (T
L1) was obtained. The loop height of the obtained entangled yarn is 1 to
The number of loops of 3 mm was 82/10 cm. FIG.
Weaving was carried out using the yarn of Table 1 and the yarn of Table 1 to obtain a multiple woven fabric. In the obtained fabric, the air entangled yarn did not appear on the use surface, and the air entangled yarn appeared only on the engagement function surface. The engaging strength of the cloth is as shown in Table 2, and the cloth had insufficient engaging strength.

[0021]

[Table 1]

[Table 2]

[Brief description of drawings]

FIG. 1 is a woven structure diagram used in Example 1 and Comparative Examples 1 to 4.

FIG. 2 is a schematic view of the entangled yarn for explaining the loop height of the air entangled yarn.

FIG. 3 is a schematic view of an entangled yarn for explaining a method for measuring the number of loops of the air entangled yarn.

[Explanation of symbols]

 a: loop a b: loop b a: loop that counts as the number of loops b: loop that does not count as the number of loops c: loop that counts as the number of loops

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location D03D 25/00 102 D03D 25/00 102Z

Claims (3)

[Claims] 1. An air-entangled yarn having a loop composed of filaments satisfying the following formulas (1) and (2) and having a single yarn denier of 3 denier or more is used as a warp or weft so as to satisfy the following formula (3). The multi-woven fabric having an engaging function, characterized in that the entangled yarn appears on only one side of the fabric. 5 ≦ (DT × DE / 2) ^1/2 (1) DE ≦ 35 (2) CF ≧ 25 (3) where DT is the breaking strength (g / d) of the filament,
DE represents the breaking elongation (%) of the filament, and CF represents the area ratio (%) of the air entangled yarn appearing on one surface of the woven fabric on that surface. 2. A skin material for a seat, comprising the multiple woven fabric according to claim 1. 3. A vehicle seat in which the skin material according to claim 2 is engaged with an engaging element group fixed to a seat base material.