JPH0639747B2 - Artificial leather with excellent wearing feeling and method for producing the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to an artificial leather which is excellent in wearing feeling. More specifically, an artificial leather suitable for gloves used in sports fields such as baseball and golf, leisure gloves such as hunting and fashion gloves for women, and also suitable for clothing fields requiring elasticity, etc. And a manufacturing method thereof.

2. Description of the Related Art Conventionally, an artificial leather in which an elastic polymer is filled in a laminated entangled body composed of ultrafine fibers and knitted fabrics is widely known as disclosed in Japanese Examined Patent Publication No. 55-26222. This artificial leather has a soft and drape-rich texture compared to conventional artificial leather in which an elastic polymer is filled in a non-woven fabric made only of ultrafine fibers, and has high elongation, tear strength, seam strength, etc. It has excellent mechanical strength. That is, in the case of artificial leather composed of ultrafine fibers and an elastic polymer, the mechanical strength of the ultrafine fiber entangled body is so small that it cannot endure as a garment. Loses its softness and drape, resulting in a stiff, rubbery and dry texture. However, in the case of artificial leather in which an elastic polymer is filled in a layered entangled body composed of ultrafine fibers and knitted fabrics, the knitted fabrics intervene, whereby the mechanical strength of the layered entangled body, that is, strong elongation and tear Since the strength and the seam strength are improved, a sufficient mechanical strength as a garment can be achieved by filling a small amount of the elastic polymer. The small amount of the elastic polymer makes it possible to make the texture soft and rich in drape, and to make a light product.

Problems to be Solved by the Invention As described above, the artificial leather made of the ultrafine fiber entangled body in which the conventional knitted fabrics intervene is certainly excellent especially for general clothing, but it is not suitable for baseball, golf, etc. For sports,
When it was applied to gloves for leisure such as hunting and fishing, and for women, it was thick and had too much rubber elasticity, and it did not stretch easily, and it was not suitable for hands. In addition, clothes for which elasticity is required could not be used because of their low elongation. Therefore, the field of using artificial leather has been limited so far.

Means for Solving the Problems The inventors of the present invention have arrived at the present invention as a result of earnest studies on the above problems. That is, one of the present invention is an artificial leather in which an elastic polymer is filled in a laminated entangled body in which a stretchable woven fabric is present inside the ultrafine fiber entangled body layer of 0.5 d or less, The elongation is 20% or more under a load of 500 g / cm, and the cyclic elongation recovery rate is 80% or more. As a whole, the woven fabric is crimped and shrunk, and the laminated entangled body is shrunk accordingly. Is an artificial leather with excellent wearing feeling, and the other one is a raw fabric of a shrinkable woven fabric using a false twisted textured yarn or a composite yarn composed of polymers of two or more components different in shrinkage against heat, or a dyeing process temperature. The substantially unshrinkable woven fabric heat-set at a lower temperature is made into a laminated entangled body by interposing it inside the ultrafine fiber entangled body of 0.5 d or less, and then, in the obtained laminated entangled body Sheeted with elastic polymer filled in and dyed The method of manufacturing an excellent artificial leather intervention was Wearing a laminated entangled body stretch fabric in step, characterized in that shrinking the sheet at a temperature higher than the heat setting temperature is,.

It is important that the artificial leather according to the present invention has a large weft elongation at low stress, and it is necessary that the artificial leather has an elongation of 20% or more, preferably 25 to 40% under a load of 500 g / cm. Is. When the elongation is 20% or less, the bending of the hand is felt tight when worn as gloves, which is not preferable. Further, the stretchable clothing material is not preferable because it has too small elongation and feels cramped when worn.

The weft elongation of the artificial leather of the present invention, which has an excellent wearing feeling, greatly depends on the weft elongation of the stretchable fabric. In the present invention, in order to obtain a weft direction elongation of 20% or more under a load of 500 g / cm, a weft elongation of a shrinkable woven fabric using a false twisted textured yarn or a composite yarn composed of polymers of two or more components different in shrinkage against heat 20
It is possible by designing at more than%. The shrinkable woven fabric interposed inside the artificial leather is preferably, for example, one using a false twist textured yarn or a shrinkable woven fabric using a composite yarn made of polymers of two or more components having different heat shrinkability. 20% at a load of 500 g / cm by crimping and shrinking the false-twisted yarn or the above-mentioned composite yarn constituting the shrinkable woven fabric by heat treatment during the dyeing process to cause crimp shrinkage.
The above weft elongation can be imparted to the artificial leather. This is a shrinkable woven fabric or a heat-set shrinkable woven fabric with a heat setting temperature set to a temperature lower than the dyeing process temperature, intercalated with an ultrafine fiber entangled body, filled with an elastic polymer, and then subjected to a dyeing process. It is a method for producing artificial leather having excellent wearing feeling, which is characterized by shrinking by 20% or more in the weft direction during the process. For example, if the shrinkable fabric is composed of false twisted yarn of polyester fiber, the
A heat setting temperature of a temperature lower than 130 ° C, for example, about 110 ° C to 120 ° C is preferable. This shrinkable woven fabric, or a method of crimp shrinking during the dyeing process using a shrinkable fabric that is heat set at a temperature lower than the dyeing process temperature,
It is preferable that the shrinkable woven fabric develops crimp during the dyeing process and crimps and shrinks, thereby shrinking the laminated entangled body, so that the base fabric density becomes high and the surface becomes more dense and a high-class feeling appears. There are advantages.

Further, the artificial leather according to the present invention can be used for clothing requiring stretchability, for example, stretchable material, and it is necessary that the repeated elongation recovery rate is 80 or more. The term “recovery elongation recovery rate” as used herein refers to a value measured by the JIS-L1096-1979 repeated constant speed constant elongation method. If the cyclic elongation recovery rate is less than 80%, sagging becomes large due to repeated use such as bending and stretching when worn, and "loose" at the elbow or knee is unfavorable. Repeated elongation recovery rate of 80%
In order to set the above, as the shrinkable woven fabric, a shrinkable woven fabric using a false twist textured yarn or a composite yarn made of a polymer of two or more components having different shrinkage properties to heat is used. The shrinkable woven fabric is used without heat treatment of the greige itself so that it shrinks 20% or more in the weft direction during the dyeing process, or heat set at a temperature lower than the heat history during the dyeing process. By using the method, it is possible to set the weft elongation to 20% or more, and at the same time, to set the cyclic elongation recovery rate to 80% or more.

Next, the ultrafine fibers constituting the artificial leather of the present invention having excellent wearing feeling have a single yarn fineness of 0.5 denier or less, and further,
It is preferably 0.3 denier or less. If it is 0.5 denier or more, the flexibility is inferior and a preferable lighting effect cannot be obtained. When it is 0.5 denier or less, the texture is flexible and an elegant lighting effect can be obtained.

The material of the ultrafine fibers is not particularly limited, and polyethylene terephthalate (PET), nylon-6, nylon-
Any of synthetic fibers such as 6.6, polyacrylonitrile, and regenerated fibers such as rayon and cupra rayon may be used.

As a method for obtaining the ultrafine yarn, a conventional method can be applied. For example, a method using mixed ultrafine fibers such as a method using sea-island fibers or a method using mixed fibers, a direct spinning method, and further a melt blowing method can be used as a method for obtaining the ultrafine fibers of the present invention.

The ultrafine fiber entangled body layer can be obtained by forming an ultrafine fiber into a sheet by, for example, a card cross layer method, a papermaking method, a melt blowing method, and entangled the sheet by a columnar flow method, a needle punch method, or the like. From the viewpoint of the uniformity of the sheet and the combination with the columnar flow method, an ultrafine fiber sheet produced by the papermaking method is preferably used.

Next, a method for manufacturing the artificial leather of the present invention will be described.

For example, a plain weave fabric of false twisted textured yarn having crimp shrinkage is heat set at a temperature lower than the dyeing process temperature.

Next, a sheet made of ultrafine fibers obtained by the direct spinning method is prepared by the papermaking method. Fibers having different solvent solubilities may be mixed in the ultrafine fiber sheet, and the fibers are extracted and removed by the solvent in the process to help adjust the texture. Insert the above plain woven fabric between this ultrafine fiber sheet, nozzle diameter 0.05 ~ 0.5 mm
The columnar water flow having a jet pressure of 1 to 30 kg / cm ² is applied to the front surface and the back surface of the above-mentioned sheet all over the nozzles, and the entanglement treatment is performed.

Next, after fluffing the entangled body with Emily paper, a sizing agent, for example, polyvinyl alcohol, is attached to the fiber entangled body, and then a sizing agent, for example, carboxymethylcellulose (in order to protect the surface fluff from the elastic polymer, cm
C), polyvinyl alcohol (PVA), or CMC and PVA
It is coated with a blending agent such as. Then, the entangled body is impregnated with the elastic polymer, and the elastic polymer is coagulated by a dry coagulation method or a wet coagulation method. In this case, the elastic polymer filled by the wet coagulation method is particularly preferable because it has a microporous structure.

After the impregnation solidification is completed or during the solidification, the sizing agent impregnated in the entangled body and the sizing agent coated on the surface of the entangled body are extracted and removed.

Finally, this is dyed to cause crimp of the shrinkable fabric to be crimped and shrunk, and the laminated entangled body is also shrunk accordingly, and further, preferably, fluffing of the surface is adjusted with a brush or the like,
The artificial leather of the present invention having a good writing effect and an excellent wearing feeling can be obtained.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples. In addition,
The measuring method used in the following examples is based on the following method.

Elongation: The KES-F system (Kaw
abata's Evaluation System for Fabric tensile tester)
To measure.

Elongation: JIS L 1096-1979 Repeated constant velocity constant elongation method Flexibility: Value according to JIS L-1079 cantilever method Example 1 0.1d polyethylene terephthalate fiber (PET fiber and abbreviated below) obtained by direct spinning method I cut it to 3 mm with a cutter. Then, the paper is made by the wet papermaking method and weighs 35
Nonwoven sheets of g / m ² and 40 g / m ² were obtained.

In addition, the shrinkable plain weave fabric made of false twisted yarn made of 100d / 48f PET fiber was shrunk in boiling water, and stretched from the raw fabric product to a condition of 5% warp and 16% weft width, and at 120 ° C. Heat set. The shrinkage ratio of this product in hot water is 6.5.
%, Weft 11.0%, and elongation under constant load of 500 g / m ² was 6.5% and weft 20.6%.

35 g / m ² of the above-mentioned paper-made nonwoven sheet was laminated as a lower layer, the plain woven fabric as an intermediate layer, and 40 g / m ² as an upper layer. This was placed on an 80-mesh wire net having a suction box with a perforated plate at the bottom, and a high-pressure water stream was applied to each of the front and back sides six times using a nozzle with a diameter of 0.2 mm. The obtained non-woven fabric has a weight of 124 g / m ² , a thickness of 0.58 mm and a density of 0.216 g /
It was cm ³ .

This non-woven fabric was napped with 320 mesh sandpaper, then PVA was attached and dried. Then, a 20% aqueous solution of carboxymethyl cellulose was thinly coated on the raised surface and dried.

The product thus obtained was impregnated with a 15% solution of polyurethane elastomer in DMF and coagulated in water. At that time, carboxymethyl cellulose is also dissolved and removed. This product is dyed with a disperse dye at 130 ° C at high temperature and high pressure to cause crimping of the false twisted yarn that constitutes the shrinkable woven fabric to cause crimp shrinkage, which causes shrinkage of the laminated entangled body, and then reduction cleaning. After drying, the surface was lightly bristled with a brush to obtain the intended artificial leather, which was extremely comfortable to wear. This artificial leather had a large shrinkage in the weft direction during the dyeing process, shrinking 13%.

The physical properties of leather are shown below.

Thickness 0.64 mm, weight 194 g / m ² , density 0.303 g / cm ³ , weft elongation 26.8% cyclic elongation recovery rate 90.8%, weft 84.9% flexibility 35 mm Example 2 0.1d nylon fiber obtained by direct spinning method Was cut into 3 mm with a cutter. Then, papermaking was performed by a wet papermaking method to obtain non-woven sheets having a weight of 35 g / m ² and 40 g / m ² .

Also, a plain weave fabric made of false twisted yarn made of 66 nylon fiber of 50d / 24f was put in a width of 5% and weft of 16% and heat set at 120 ° C. The shrinkage rate of this product in hot water is 1
It was 1.5% and latitude 13.5%. This plain woven fabric is used as an intermediate layer, and the weight of the non-woven fabric sheet is 40 g / m ² and 35 g / m ²
Using, and was laminated in the same manner as in Example 1.

Then, it is dyed with an acid dye at 125 ° C., and is crimped and shrunk by expressing it with the crimp of the false twisted yarn constituting the shrinkable woven fabric,
Along with that, the laminated entangled body was also shrunk, then reduction cleaning was performed, and after drying, the surface was lightly bristled with a brush to obtain the intended leather, which was an artificial leather with an extremely excellent wearing feeling. The obtained artificial leather had a large shrinkage in the weft direction during the dyeing process, which was 12.7%.

The physical properties of leather are shown below.

Thickness 0.61mm, weight 174g / m ² , density 0.285g / cm ³ , weft elongation 31.8% cyclic elongation recovery rate 90.2%, weft 85.3% flexibility 30.5mm Example 3 100d / 48f PET used in Example 1 A plain weave woven fabric using false twisted yarns made of fibers was used as an intermediate layer without heat setting, and the same papermaking sheet 40 g / m ² as in Example 1 was used as a lower layer and 50
The layers were laminated with g / m ² as the upper layer. When this raw machine was contracted in boiling water, the contraction rates were 38.5% for warp and 39% for weft.

When the obtained laminated entangled body was processed in the same manner as in Example 1, the shrinkage ratio in the weft direction during the dyeing process was 26.5%.
However, the artificial leather was extremely comfortable to wear and was also excellent in repeated elongation recovery. The physical property data is shown below.

Thickness 0.74mm, weight 230g / m ² , density 0.310g / cm ³ , weft elongation 24.5% cyclic elongation recovery rate 89.5%, weft 84.5% flexibility 34.5mm The effect of the invention The artificial leather with excellent wearing feeling is Weft elongation is 500 g / cm
Since it is 20% or more under load, when applied to gloves for sports such as baseball and golf, leisure such as hunting and fishing, and women's gloves, it stretches following hand bending when worn, and it fits well on the hand. To fit in.

When the artificial leather of the present invention is applied to the field of clothing, it can be sufficiently applied to the field of clothing requiring elasticity. Further, it is preferable to set the repeated elongation recovery rate of the artificial leather to 80% or more because sagging and wearing off of the elbow are eliminated when worn.

As described above, the artificial leather of the present invention further expands the field of use of the artificial leather to date, and is extremely effective.

Claims (2)

[Claims] 1. An artificial leather in which an elastic polymer is filled in a laminated entangled body in which a stretchable woven fabric intervenes in an ultrafine fiber entangled body layer of 0.5 d or less, and the weft elongation of the artificial leather is 500 g / cm
20% or more under load and 80% cyclic elongation recovery
As described above, the artificial leather excellent in wearing feeling is characterized in that the woven fabric as a whole is crimped and shrunk, and the laminated entangled body is shrunk accordingly. 2. A shrinkable woven fabric using a false twisted textured yarn or a composite yarn composed of polymers of two or more components having different shrinkages with respect to heat, or the above shrinkable fabric heat-set at a temperature lower than the dyeing process temperature. Is a laminated entangled body intervening inside the ultrafine fiber entangled body of 0.5d or less, then, as a sheet-like material filled with an elastic polymer in the obtained laminated entangled body, further in the dyeing process A method for producing artificial leather, which comprises a laminated entangled body in which a stretchable woven fabric is interposed, characterized in that the sheet-like material is contracted at a temperature higher than the heat setting temperature.