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Stretchable artificial leather and method for producing the same

A manufacturing method and technology of artificial leather, applied in the direction of pressurized water, textile and papermaking, transportation and packaging, etc., can solve the undisclosed simple and effective method for improving the longitudinal elongation and stretchability of artificial leather, the undisclosed improvement of elongation It achieves the effect of having a sense of fullness, good formability, and excellent shape stability without the problems of artificial leather such as flexibility and stretchability.

Active Publication Date: 2016-08-24
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Patent Documents 3 and 4 do not describe any artificial leather having an entangled body of ultrafine fibers, and do not study any improvement in the longitudinal extensibility of the fabric.
[0006] As mentioned above, the above-mentioned prior art documents do not disclose a simple and effective method for improving the longitudinal extensibility and stretchability of artificial leather.
In addition, the above-mentioned prior art documents do not disclose artificial leather with improved longitudinal elongation and stretchability, although the density is increased to improve mechanical properties.

Method used

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  • Stretchable artificial leather and method for producing the same
  • Stretchable artificial leather and method for producing the same
  • Stretchable artificial leather and method for producing the same

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0167] The stretchable artificial leather according to the first embodiment of the present invention is a stretchable artificial leather composed of a fiber entanglement body including ultrafine fibers having an average single fiber fineness of 0.9 decitex or less, and the apparent density thereof is set to 0.40 g / cm 3 above, and if Figure 4 , 5 As shown, in a section parallel to its thickness direction and longitudinal direction, there is a micro-corrugated structure composed of ultrafine fibers along the longitudinal direction. The stretchable artificial leather of the present invention has moderate stretchability and sense of end of elongation in the longitudinal direction due to its relatively high apparent density and micro-corrugated structure, and at the same time has good mechanical properties. The stretchable artificial leather of the present embodiment is preferably produced by the above-mentioned production method of the present invention, but the production metho...

no. 2 approach

[0194] The stretchable artificial leather of the second embodiment can be produced, for example, by the above-mentioned production method, and has the following features. Hereinafter, the stretchable artificial leather of the second embodiment will be described in detail, and the configurations not particularly mentioned are the same as those of the stretchable artificial leather of the first embodiment.

[0195] [elasticity artificial leather]

[0196] The stretchable artificial leather of the second embodiment is a stretchable artificial leather composed of a fiber entanglement body containing ultrafine fibers having an average single fiber fineness of 0.9 decitex or less, and the apparent density thereof is set to 0.40 g / cm 3 In addition, the elongation coefficient calculated by the following formula (1) shall be 50 or less. The stretchable artificial leather of the present embodiment has moderate stretchability in the longitudinal direction and a feeling of end-of-stretch...

no. 3 approach

[0209] [elasticity artificial leather]

[0210] The stretchable artificial leather of the third embodiment in the present invention has the following characteristics.

[0211] The stretchable artificial leather of the present embodiment has stretchability, and has the following (A) and (B) in the longitudinal strength-elongation curve measured by the method described in JIS L 1096 (1999) 8.14.1A method conditions of.

[0212] (A) Strength F at 5% elongation 5 ％ It is 0.1~10N / 2.5cm.

[0213] (B) Strength F at 20% elongation 20 ％ and the above F 5 ％ In the relationship, F 20 ％ / F 5 ％ 5 or more.

[0214] In the present embodiment, the strength-elongation curve is measured by the method described in JIS L 1096 (1999) 8.14.1A method. A test piece with a width of 2.5 cm was fixed to chucks with a clamp interval of 20 cm, and the test piece was pulled at a constant speed to obtain elongation and strength. Based on the results, a strength-elongation curve was prepared in...

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Abstract

The present invention provides a stretchable artificial leather and a manufacturing method thereof. The manufacturing method of the stretchable artificial leather comprises the following steps: a step of forming a web from ultrafine fibers; and a step of entangling the obtained web to produce an entangled nonwoven fabric. ; a process of producing a substrate for artificial leather by ultrafinening the ultrafine fibers in the nonwoven fabric; a process of producing artificial leather using the obtained substrate for artificial leather; The elastic body sheet stretched by 5 to 40% is bonded, and the stretched state of the elastic body sheet is relaxed, thereby making the elastic body sheet shrink in the longitudinal direction, and simultaneously making the artificial leather shrink in the longitudinal direction. The artificial leather is heat-treated, followed by a step of pulling the artificial leather from the elastic body sheet.

Description

technical field [0001] The present invention relates to a stretchable artificial leather having moderate elongation in the longitudinal direction, a feeling of end of stretch, and excellent softness, formability, and wearing feeling, and a method for producing the stretchable artificial leather. In addition, the present invention relates to a stretchable artificial leather having excellent mechanical strength and a moderate feeling of end-of-stretch in the longitudinal direction, and a method for producing the same. Background technique [0002] Leather-like sheets such as artificial leather are used in various applications such as clothing and raw materials because they have softness and functionality that natural leather does not have. Stretchability is attracting attention as an important function from the viewpoints of wearing comfort in clothing applications, molding processability in raw material applications, ease of sewing, and beautiful workmanship. [0003] Based ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/00
CPCB32B33/00D06N3/00D06N3/14D06N3/0004D06N3/0011D06N3/0036D06N3/0031D06N2209/1635D06N2211/28Y10T428/24438D06C21/00D06M13/00D06N3/0027D06N3/0029
Inventor 藤泽道宪前田幸男井上和正野村康寿芦田哲哉渡边久一
Owner KURARAY CO LTD
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