JP2000303367A - Artificial leather with raised hair - Google Patents

Abstract

(57) [Problem] The present invention has a raised hair excellent in rebound resilience, dimensional stability and abrasion resistance in spite of achievement of weight reduction, thinning and softening. It is intended to provide artificial leather. The artificial leather having naps of the present invention is 1.5% or less.
an entangled layer (A) composed of ultrafine fibers of dtex or less, and a degree of crystal orientation obtained from wide-angle X-ray diffraction measurement of 58% to 85%
The degree of amorphous orientation by the polarization fluorescence method is 0.088 to
0.450, and the birefringence is 50 × 10 ⁻³ 100 × 10
^-3 and an artificial leather obtained by laminating an entangled layer (B) of polyester fibers having a specific gravity of 1.350 to 1.385, and the surface of the entangled layer (A) The nap of the ultrafine fibers is present, and the ultrafine fibers forming the nap are substantially bundled, penetrate in the thickness direction of the entangled layer (B), and the bundle of the penetrated ultrafine fibers is On the non-laminated surface of the layer (B),
A plurality of continuous stripe-shaped stitch-like loop-like entanglements in the warp direction are formed and covered to form a fiber entangled structure, and at least the inside of the entangled layer (A) contains a polymer It is characterized in that an elastic body is present.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to artificial leather having naps having excellent rebound resilience, dimensional stability and abrasion resistance.

[0002]

2. Description of the Related Art In the field of clothing, with the diversification of fashions, there is a shift to lighter, thinner fabrics and more flexible. In particular, in artificial leather using a nonwoven fabric substrate as a substrate, if lightweight and thin, softness can be easily obtained, but strength, shape stability tends to decrease, and if emphasis is placed on strength,
It was lightweight, hard to thin, and lacked the balance of product characteristics.

[0003]

As a means for solving these problems, the present inventors have disclosed JP-A-63-2196.
No. 2 proposes a technique using a new entangled structure which is completely different from the nonwoven fabric structure obtained from the conventional needle punch or water jet punch technique. However, there is a problem that the resilience of the product is insufficient due to the softening, and the product is easily wrinkled.

[0004] In view of the background of the prior art, the present invention provides
An object of the present invention is to provide artificial leather having naps excellent in rebound resilience, dimensional stability, and abrasion resistance despite achieving lightening, thinning, and softening.

[0005]

The present invention employs the following means in order to solve the above-mentioned problems. That is, the artificial leather having the napped hair of the present invention comprises:
An entangled layer (A) composed of ultrafine fibers of 5 dtex or less, and a degree of crystal orientation obtained from wide-angle X-ray diffraction measurement of 58% to 85%;
%, And the degree of amorphous orientation by the polarized fluorescence method is 0.088 to
0.450, and the birefringence is 50 × 10 ⁻³ 100 × 10
^-3 and an artificial leather obtained by laminating an entangled layer (B) of polyester fibers having a specific gravity of 1.350 to 1.385, and the surface of the entangled layer (A) The nap of the ultrafine fibers is present, and the ultrafine fibers forming the nap are substantially bundled, penetrate in the thickness direction of the entangled layer (B), and the bundle of the penetrated ultrafine fibers is On the non-laminated surface of the layer (B),
A plurality of continuous stripe-shaped stitch-like loop-like entanglements in the warp direction are formed and covered to form a fiber entangled structure, and at least the inside of the entangled layer (A) contains a polymer It is characterized in that an elastic body is present.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has been made to solve the above-mentioned problems, that is, a nap having excellent rebound resilience, dimensional stability and abrasion resistance in spite of achievement of weight reduction, thinning and softening. The artificial leather having the ultrafine fibers, the degree of crystal orientation of 58% to 85%, and the degree of amorphous orientation of 0.0%
88 ~ 0.450, birefringence 20 × 100 ^-3 ~ 100 ×
^10-3 , a high-density three-dimensional entangled body made of a specific polyester fiber satisfying all the properties of the specific gravity of 1.350 to 1.385, and a nap on the surface of the ultrafine fiber entangled layer side. Provided, and, when viewed as a structure containing a polymer elastic body inside the ultrafine fiber entangled layer, unexpectedly,
It has been sought to solve such a problem at once.

Examples of the polymer forming the ultrafine fibers and / or ultrafine fiber bundle used in the entangled layer (A) of the present invention include nylon 6, nylon 66, nylon 12,
Polyesters such as polyamides such as copolymerized nylon, polyethylene terephthalate, copolymerized polyethylene terephthalate, polybutylene terephthalate, copolymerized polybutylene terephthalate, polypropylene terephthalate and copolymers thereof can be used. Among these, polyamides are preferably used from the viewpoints of adhesiveness to a silver surface, film-forming properties, and coloring properties.

[0008] These ultrafine fibers are obtained by direct spinning using a single component, or after forming a composite fiber using the above polymer as an ultrafine fiber component, at least one component is dissolved or removed or physical action is performed. Any of those obtained by peeling, dividing, and the like can be used. The cross-sectional shape of the ultrafine fibers is not particularly limited, and additives such as a light-proof agent, a pigment, a matting agent, an antistatic agent, and a flame retardant may be added to the ultrafine fiber-forming polymer as needed. Can be used.

The thickness of the ultrafine fibers is 1.5 dtex or less, preferably 1.0 dtex or less, more preferably 0.5 dt, from the viewpoints of color development, texture, touch and the like.
ex and the following are used. The lower limit of the thickness of the ultrafine fibers is 0.0
The effect of the present invention can be sufficiently exerted even with about 001 dtex, and a mixture of ultrafine fibers having different thicknesses may be used. In order to form a uniform entangled layer (A) of such ultrafine fibers, for example, the above-mentioned conjugate fibers are made into short fibers having a length of 20 mm or more, preferably 40 mm or more,
It is preferable to make a web with a card cross wrapper and to make it ultra-fine during the post-processing.

Important constituents of the present invention are that the degree of crystal orientation is 58% to 85%, preferably 60% to 75%, and the degree of amorphous orientation is 0.088 to 0.450, preferably 0.1%.
20 to 0.450, and the birefringence is 20 × 10 ⁻³ to 10
Entanglement made of a specific polyester fiber satisfying all four characteristics of 0 × 10 ⁻³ , preferably 30 × 10 ^{−3 to} 60 × 10 ⁻³ and specific gravity of 1.350 to 1.385. The layer (B) is to be laminated on the entangled layer (A). If at least one of the degree of crystal orientation, the degree of amorphous orientation, the birefringence, and the specific gravity deviates from the above range, it becomes difficult to obtain the good rebound resilience aimed at by the present invention.

As the polymer forming the polyester fiber, a polymer made of at least one selected from polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate and a copolymer thereof is preferably used. These polymers are melted at a spinning speed of 2000 to 4000 m / min, more preferably 25
Use fibers taken at 00-3500 m / min.
The cross-sectional shape of the polyester fiber is not particularly limited, and the fiber thickness is 0.04 dtex or more.
10 dtex, preferably 0.04 dtex to 5 dte
The value in the category of x is preferable, but it may be appropriately determined and used in consideration of the flexibility and thickness of the product. By subjecting the undrawn yarn fiber to a heat treatment at a temperature higher than the temperature at which crystallization is possible, that is, at a temperature higher than the secondary transition temperature of the polyester fiber, resilience and dimensional stability are imparted. The heat treatment is performed by laminating the entangled layer of microfibers (A) and the entangled layer of polyester fibers (B) to form a special entangled structure, which will be described later.
Alternatively, the effect of the present invention is not impaired even if the web is laminated on the entangled layer (A) of ultrafine fibers as a web by heat treatment at the stage of staple.

The heat treatment temperature for bringing the degree of crystal orientation, the degree of amorphous orientation and the birefringence into the intended range is 20 ° C. or more, preferably 4 ° C. or more, from the secondary transition temperature of the polyester.
The treatment is preferably performed in an atmosphere at a temperature higher than 0 ° C.
Specifically, 92 to 230 ° C, more preferably 120 ° C
As described above, the treatment is preferably performed at 200 ° C. or lower. The heating means for such a heat treatment may be either dry heat or wet heat.
In addition, the rate of exposure to the atmosphere and the rate of cooling may be abrupt or slow, but the former gives a preferable result.

The lamination ratio of the ultrafine fibers / polyester fibers is preferably 20/80 to 90/10% by weight, more preferably 30/70 to 80/20% by weight, and particularly preferably 40/60 to 70/30%. % By weight. When the content of the ultrafine fiber web is less than 20% by weight, formation of a stripe-shaped stitch-like loop-like entanglement covering the surface of the entangled layer of the polyester fiber is reduced, and abrasion resistance and flexibility are reduced. If it exceeds 90% by weight, the degree of coating increases, but the rebound resilience effect is undesirably reduced.

According to the present invention, the ultrafine fibers penetrate through the entangled layer (B) of the polyester fibers in a substantially bundled state, and the penetrated ultrafine fibers are formed by non-lamination of the entangled layer of the polyester fibers. It is important that the surface be covered with a striped stitch-like loop entanglement. A method for producing such a fiber entangled structure can be achieved, for example, by passing the web of the ultrafine fibers and the laminated web of the polyester fibers through a sewing machine having stitching needles. In this case, a stitching needle is pierced from the non-laminated surface of the entangled layer (B) of the polyester fiber and is continuously processed so as to be pulled out, so that the stitching needle bundles the ultrafine fiber into a bundle. , Penetrating through the web of the polyester fiber, pulled out as a loop on the non-laminated surface, stitching the loop again with a stitching needle, hooking the ultrafine fibers in a bundle, and By penetrating through the web and being pulled out as a loop on the non-laminated surface of the polyester fiber, a continuous network-like loop-like entanglement in the vertical direction is formed. That is, an advanced fiber entangled structure is obtained in which the non-laminated surface of the polyester fiber has a continuous network-like loop-like entanglement in a striped state in the vicinity of the surface of the ultrafine fiber layer. The number of fiber bundles penetrating through the web and pulled out as a non-loop shape can be changed by changing the conditions of the stitching needle, and if it is desired to obtain a high-strength product, the number of the fiber bundles And the stitching length formed by the mesh-like loop is 0.5 mm or more and 5.0
mm or less, more preferably 1.0 mm or more and 3.0 mm or less. If it is less than 0.5 mm, it is difficult to obtain a uniform basis weight, and if it exceeds 5.0 mm, the strength is reduced and dimensional changes are likely to occur. Further, the interval between the continuous mesh-like loop-like entanglements of the stripe is preferably 5 or more and 24 or less, more preferably 10 or more and 20 or less. If it is less than 5 lines / in, the strength is reduced, and if it exceeds 24 lines / in, it is difficult to obtain a uniform network loop.

[0015] The ultrafine fibers are substantially bundled,
This means that when the stitching needle pulls out the ultrafine fiber, a part of the polyester fiber is slightly mixed and pulled out to form a loop.

The above-mentioned sewing machine indicates a marimo-type sewing machine that does not use a warp or a weft, and the present inventors have obtained the conventional needle punch or water jet punch technology. Japanese Patent Laid-Open Publication No. Sho 63-21962 proposes artificial leather having naps using a new entangled structure completely different from the nonwoven fabric structure, and makes it possible to make the product thinner, softer and stronger. However, the resilience was poor, wrinkles were easily generated, and it was necessary to improve it one step, so as described above, when viewed as the fiber entangled structure of the present invention, it was found that such a problem could be solved brilliantly. Was made.

The fiber entangled body may be subjected to an entanglement treatment such as a needle punch or a water jet punch in order to further increase the entanglement or make the surface denser.
In addition, a web or a fiber entangled layer (A) / (B) of the same fiber as the loop-forming fiber or another fiber on the loop-shaped surface of the fiber entangled body, as long as the effects of the present invention are not impaired.
May be laminated on a plurality of sheets to form a fiber entangled body that has been subjected to an entanglement process such as a needle punch or a water jet punch.

According to the present invention, at least the entangled layer (A) of the fiber entangled body is provided with a polymer elastic body.
Examples of the polymer elastic body include polyurethane such as polyether, polyester, polyester / polyether copolymer, and polycarbonate, or polyvinyl chloride, polyacrylate, butadiene-styrene, nitrile, and chloroprene. Synthetic rubber or natural rubber such as a system can be used. Among these,
Polyurethane resins such as polyether-based, polyester-based, polyester-polyether copolymer-based, and polycarbonate-based resins are particularly preferably used from the viewpoint of the feeling of the product and durability.

The polymer elastic body is a resin solution adjusted to an appropriate concentration, and the polymer elastic body is present at least inside the entangled layer (A) of the fiber entangled body. By immersing the entire entangled body in the resin solution and impregnating it, and wet or dry coagulation, the resin may be present in the entire fiber entangled body, or
Further, it may be applied to only the entangled layer (A) of the ultrafine fibers by a method such as reverse roll coating, gravure coating, or knife coating, and may be solidified by a wet or dry method. Needless to say, additives such as coloring agents, antioxidants, antistatic agents, dispersants, softeners, coagulation regulators, flame retardants, antibacterial agents, and deodorants are added to the polymer elastic material as necessary. Does not impair the effects of the present invention. In the present invention, at least the surface of the entangled layer (A) of the ultrafine fibers of the structure formed of the fiber entangled body and the resin is subjected to a nap treatment to form nap.

The structure obtained by the present invention may be dyed, finished, kneaded, or woven on
A knitted fabric, a film, or the like may be subjected to a sticking process.

[0021]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples. However, the validity and the scope of rights of the present invention are limited thereby.
There is no restriction. Rather, they bring about the following applications and developments.

In the examples, the values of the degree of crystal orientation, the degree of amorphous orientation, and the value of birefringence were calculated by the following measuring methods.

The degree of crystal orientation is based on wide-angle X-ray diffraction measurement (counter method), and the conditions are as follows: X-ray generator; RU-200 type, manufactured by Rigaku Corporation X-ray source: CuKα ray (Ni Output: 35KV 15mA Goniometer; Rigaku Denki Co., Ltd. Slit diameter: 2mm diameter pinhole collimator Detector: Scintillation counter Count recorder: RAD-C, online data processing system Equatorial line scan range: 10 35 ○ Meridian scan range: 30 to 35 scan method Step: 2θ / θ Sampling interval: 0.05 to Step Integration time: 2 seconds (010) Surface circumferential scan range: 90 to 270 Sampling interval: 0 to 270 5 ○ / Step Integration time: 2 seconds Calculated by the following formula from the half width H of the intensity distribution obtained by scanning the (010) plane observed around 2θ = 17.5 in the circumferential direction.

Degree of crystal orientation (%) = [(180−H) / 1
80] × 100 The degree of amorphous orientation was determined by a polarization fluorescence method. The conditions were as follows: Apparatus: FOM-1 manufactured by JASCO Corporation Optical system: Transmission method (excitation light wavelength: 365 nm, fluorescence wavelength:
(420 nm) Measurement system: Polarizer‖Analyzer and Polarizer = Analyzer was rotated to obtain an angular distribution of in-plane polarized fluorescence intensity (I‖, I =). Here, ‖ indicates parallel, and = indicates vertical. The degree of amorphous orientation was determined by a uniaxial orientation coefficient f ² from the following equation.

F ² = 3/2 [{I} (0) + 2I =
(0)｝ / K- ／] where K = {I‖ (0) + 4I = (0) + 8 / 3I‖
(90)｝ I‖ (0): ‖Relative polarized fluorescence intensity in the axial direction in the measurement I‖ (90): ‖Relative polarized fluorescence intensity in the orthogonal direction to the above in the measurement I = (0): = In the measurement Relative polarization fluorescence intensity in the axial direction The birefringence is a value measured by a Senarmont method and a convencator method using D-line color light with a Na bulb.

The specific gravity is JIS-L1013 7.1 (4.
2 density gradient tube method). Example 1 Fiber thickness 1.0d made of polyethylene terephthalate
staple (A) and polyethylene terephthalate (I) with tex, cut length of about 38 mm, and shrinkage of about 15 peaks / in.
V = 0.72), spinning temperature 285 ° C., take-off speed 3
An undrawn yarn (187D-24) melt-spun at 100 m / min.
The filament of (f) was converged, and a staple (B) having a cut length of about 51 mm and a shrinkage of about 12 peaks / in was prepared.

The staples were separately passed through a card cloth wrapper, and (A) = 100 g / m ² , (B) = 50
A web of g / m ² was produced. The webs are laminated, arranged on a marimo type sewing machine having stitching needles so that the stitching needles pierce from the web (B) side, and processed with a needle gauge of 18 needles / in to a stitch length of 1.3 mm. Then, the fibers forming the web layer (A) penetrate in a bundle in the thickness direction of the web layer (B),
When the penetrating fiber bundle is on the non-laminated surface of the web layer (B),
A stitch-like loop-shaped entanglement of 18 filaments / in was continuously formed in the vertical direction, and a sheet was formed in a knitted shape on one side and a nonwoven fabric on the other side.

After lightly needle-punching the nonwoven fabric surface of this sheet, the sheet is treated in hot air at 150 ° C. for 50 seconds, and further passed through a press roll heated to 90 ° C. to give a basis weight of 230 g / g.
m ² sheets were obtained. The sheet was immersed in a polyvinyl alcohol solution, impregnated so that the solid content per sheet was 20 parts, and dried.

Next, this sheet is impregnated with an ester / ether-based polyurethane solution so as to have a solid content of 30 parts per fiber resistant material, wet coagulated, desolventized in hot water, and dried. A sheet in which a polymer elastic body was provided to a fiber entangled body composed of 67 parts of 0 dtex ultrafine fibers and 33 parts of polyester fibers was obtained.

Next, the sheet is placed on a paper mesh 1
A non-stitch-like loop-shaped entangled surface was raised by a buffing apparatus equipped with 80C to prepare a greige fabric. Using a circular type liquid jet dyeing machine, the greige was dyed with 12 black disperse dyes.
After dyeing at 0 ° C. for 45 minutes and applying a finishing agent, the resultant was passed through a tumbler kneader, followed by drying and softening.

The product thus obtained is obtained by laminating a polyester fine fiber entangled layer and a polyester fiber entangled layer,
Polyurethane is provided in these entangled layers, and the polyester ultrafine fibers are bundled and penetrate the polyester fiber entangled layer in the thickness direction, and the non-laminated surface of the polyester fiber entangled layer is stitch-like in the vertical direction. Loop-shaped entanglement is continuously formed in a stripe shape.The other surface is made of a thin fabric with nap on the surface of ultrafine fibers, but has rebound resilience, is less likely to wrinkle, has abrasion resistance, and has little dimensional change. It was leather.

The polyester fiber of the staple (B) is taken out from the artificial leather, and the degree of crystal orientation, the degree of amorphous orientation,
As a result of measurement of birefringence and specific gravity, the degree of crystal orientation was 73
%, The degree of amorphous orientation is 0.179, the birefringence is 75 × 10 ⁻³ ,
The specific gravity was 1.382. Example 2 Polyethylene terephthalate in the island component, 55 parts in the polystyrene in the sea component, 45 d in fiber thickness of 3 dtex,
A staple (A) of a composite fiber having 36 island component fibers, a cut length of about 51 mm, and a shrinkage of about 12 ridges / in, and a staple (B) used in Example 1 were prepared.

The staples were separately passed through a card cross wrapper, and (A) = 160 g / m ² , (B) = 50
g / m ² , and passed through a marimo-type sewing machine having stitching needles in the same manner as in Example 1. The composite fibers forming the web layer (A) in the thickness direction of the web layer (B) are bundled. And the penetrating composite fiber bundle is 18 / in the vertical direction on the non-laminated surface of the web layer (B).
, A sheet having a knitted shape on one side and a nonwoven fabric shape on the other side was prepared by continuously forming the stitch-like loop-like entanglement in a stripe shape.

After lightly needle-punching the nonwoven fabric surface of the sheet, the sheet was treated in hot air at 120 ° C. for 40 seconds, and further passed through a press roll heated to 90 ° C. to give a basis weight of 260 g / g.
m ² sheets were obtained.

This sheet was immersed in a polyvinyl alcohol solution, impregnated so that the solid content per sheet was 15 parts, and dried. Next, the operation of immersing in a trichlorethylene solution and squeezing with a mangle was repeated to remove the polystyrene and dried, and the sheet was impregnated with an ester / ether-based polyurethane solution so that the solid content per fiber resistance was 32 parts, and the sheet was wet-processed. Coagulate, remove solvent in hot water,
Remove polyvinyl alcohol and dry.
A sheet in which a polymer elastic body was added to a fiber entangled body comprising 64 parts of dtex ultrafine fibers and 36 parts of polyester fibers was obtained.

Next, this sheet is placed on a paper mesh 1
A non-stitch-like loop-shaped entangled surface was raised by a buffing apparatus equipped with 80C to prepare a greige fabric. Using a circular type liquid jet dyeing machine, the greige was dyed with 12 black disperse dyes.
After dyeing at 0 ° C. for 45 minutes and applying a finishing agent, the resultant was passed through a tumbler kneader, followed by drying and softening.

The product thus obtained is obtained by laminating an ultrafine fiber entangled layer of polyester and a polyester fiber entangled layer,
Polyurethane is provided in these entangled layers, and the polyester ultrafine fibers are bundled and penetrate the polyester fiber entangled layer in the thickness direction, and the non-laminated surface of the polyester fiber entangled layer is stitch-like in the vertical direction. Looped intertwined continuously, formed in stripes, the other side of the ultra-fine fiber surface has raised hair, soft and soft, with appropriate rebound resilience, less likely to wrinkle, abrasion resistance, dimensions even in dry cleaning It was an artificial leather with little change.

From the artificial leather, the polyester fiber of the staple (B) is taken out, and the degree of crystal orientation, the degree of amorphous orientation,
As a result of measurement of birefringence and specific gravity, the degree of crystal orientation was 73
%, The degree of amorphous orientation is 0.179, the birefringence is 75 × 10 ⁻³ ,
The specific gravity was 1.382. Comparative Example 1 The staple (A) of the conjugate fiber of Example 2 and polyethylene terephthalate (IV = 0.7) were used as the polyester fiber.
Using 2), spinning temperature of 285 ° C, take-off speed of 1500 m /
The filament of the undrawn yarn (275D-96f) melt-spun in a minute is converged, and the cut length is about 51 mm and the number of shrinkage is about 12
A staple (B) with mountain / in was prepared.

The staples were separately passed through a card cloth wrapper, and (A) = 160 g / m ² , (B) = 50
g / m ² web was prepared, and thereafter, the same treatment as in Example 2 was performed to laminate a polyester fine fiber entangled layer and a polyester fiber entangled layer, and polyurethane was applied in these entangled layers. , Polyester ultrafine fibers are bundled and penetrate the polyester fiber entangled layer in the thickness direction, and the non-laminated surface of the polyester fiber entangled layer continuously forms a stitch-like looped And artificial leather having a nap on the other side of the ultrafine fiber surface was obtained.

This artificial leather product was thin and had flexibility and abrasion resistance, but had poor rebound resilience and dimensional stability. The polyester fiber of the staple (B) was taken out from the artificial leather, and the degree of crystal orientation, the degree of amorphous orientation, the birefringence, and the specific gravity were measured. As a result, the degree of crystal orientation was 53%, the degree of amorphous orientation was 0.078, Refraction cannot be measured, specific gravity is 1.
377. Comparative Example 2 The staple (A) of the conjugate fiber of Example 2 and the polyester fiber used in Example 1 were stretched 1.8 times with a dry heat of 130 ° C., the cut length was about 51 mm, and the number of shrinkage was about 12 peaks /. A staple (B) was prepared.

The staples were separately passed through a card cloth wrapper, and (A) = 160 g / m ² , (B) = 50
g / m ² web was prepared, and thereafter, the same treatment as in Example 2 was performed to laminate a polyester fine fiber entangled layer and a polyester fiber entangled layer, and polyurethane was applied in these entangled layers. , Polyester ultrafine fibers are bundled and penetrate the polyester fiber entangled layer in the thickness direction, and the non-laminated surface of the polyester fiber entangled layer continuously forms a stitch-like looped And artificial leather having a nap on the other side of the ultrafine fiber surface was obtained.

Although this artificial leather product was thin and had flexibility and abrasion resistance, it had poor rebound resilience and dimensional stability. The polyester fiber of the staple (B) was taken out from the artificial leather, and the degree of crystal orientation, the degree of amorphous orientation, the birefringence, and the specific gravity were measured. As a result, the degree of crystal orientation was 93%, the degree of amorphous orientation was 0.553, The refraction was 163 × 10 ⁻³ and the specific gravity was 1.388.

[0043]

According to the present invention, resilience, resilience, and weight reduction, thinness and softness are achieved.
An artificial leather having naps having excellent dimensional stability and abrasion resistance can be provided, and thus a material which can be effectively used not only in the field of clothing but also in the field of materials can be provided. Furthermore, even if it does not use a lining, even if it touches a bare skin directly, it can provide a thing with good slippage and a hard cutting surface.

Claims (3)

[Claims] An entanglement made of ultrafine fibers of 1.5 dtex or less.
Layer (A) and crystal orientation obtained from wide-angle X-ray diffraction measurement
Degree is 58% to 85%, amorphous orientation by polarized fluorescence method
The degree is 0.088 to 0.450 and the birefringence is 50 × 1
0^-3100 × 10 ^-3And the specific gravity is 1.350-
The entangled layer (B) of polyester fiber of 1.385
A laminated artificial leather, wherein the entangled layer (A)
The surface has naps of microfibers, and the naps forming the naps
The fibers are substantially bundled and the thickness of the entangled layer (B) is
And the bundle of the penetrated microfibers forms the entangled layer (B).
Multiple continuous stripes in the longitudinal direction on the non-laminated surface of
Fiber entangled and covered with a stitch-like loop
Forming an integrated structure, and at least the entangled layer
(A) characterized by the presence of a polymer elastic body inside
Artificial leather with raised hair. 2. The artificial leather having naps according to claim 1, wherein the ratio between the ultrafine fibers and the polyester fibers is 20/80 to 90/10% by weight. 3. The polyester fiber according to claim 1, wherein the polyester fiber is made of at least one selected from polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate and a copolymer thereof. Artificial leather with raised hair.