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Raised leather-like sheet and manufacturing method thereof

A manufacturing method, leather technology, applied in the direction of flat products, other household utensils, textiles and papermaking, etc., can solve the problems of insufficient availability of nubuck, rough surface, etc.

Active Publication Date: 2020-10-20
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] When the napped fibers are fixed with a polymer elastomer, there is a problem that the surface has a rough touch, and the wet and slippery touch of the nubuck cannot be obtained sufficiently.

Method used

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  • Raised leather-like sheet and manufacturing method thereof
  • Raised leather-like sheet and manufacturing method thereof
  • Raised leather-like sheet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Ethylene-modified polyvinyl alcohol as a thermoplastic resin as a sea component, and isophthalic acid-modified polyethylene terephthalate (the content of isophthalic acid unit 6.0 mol%) were melted separately. Then, the respective molten resins were supplied to a spinning nozzle having a plurality of spinneret openings arranged in parallel to form a cross section of the sea component having 25 island components of uniform cross-sectional area. At this time, the pressure was adjusted so that the mass ratio of the sea component and the island component became sea component / island component=25 / 75, and the supply was performed. Then, the molten fiber was ejected through a spinneret set at a nozzle temperature of 260°C.

[0102] Then, the molten fiber ejected from the spinneret is sucked and stretched with an air-jet nozzle-type suction device, and spun into sea-island composite filaments with an average fineness of 2.1 dtex. The air-jet nozzle-type suction The device adju...

Embodiment 2

[0135] In Example 1, except having changed the conditions of the embossing process into the following conditions, and having formed the surface shown in Table 1, it carried out similarly to Example 1, and obtained the suede-like sheet. Then, evaluation was performed in the same manner. The results are shown in Table 1.

[0136]

[0137] The raised surface of the fiber base was embossed using the same emboss roll as in Example 1. The conditions of the embossing treatment were carried out at an embossing roll surface temperature of 160° C., a pressure of 0.3 MPa, and an embossing roll speed of 1.5 m / min.

Embodiment 3

[0139] In Example 1, except having changed the conditions of the embossing process into the following conditions, and having formed the surface shown in Table 1, it carried out similarly to Example 1, and obtained the suede-like sheet. Then, evaluation was performed in the same manner. The results are shown in Table 1.

[0140]

[0141] The raised surface of the fiber base material was embossed using an embossing roll having a slightly deep shrinkage pattern along the pores of the natural leather. The width of the protrusions of the embossing roll was 340 μm, the engraving depth was 920 μm, and the area ratio of the protrusions was 35%. The conditions of the embossing treatment were carried out at a surface temperature of an embossing roll of 130° C., a pressure of 0.3 MPa, and an embossing roll speed of 1.5 m / min.

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Abstract

The present invention uses a raised leather-like sheet, which comprises a non-woven fabric containing ultrafine fibers and a fiber base material of a macromolecular elastomer, and the raised leather-like sheet has a surface including a standing nap area and a plurality of non-piling areas, so The piling area includes ultrafine fibers of piling, the non-piling area is surrounded by the piling area and exists discontinuously, and contains ultrafine fibers that are thermally melt-bonded and lying horizontally, and the total area of ​​the non-piling area occupies 5% of the surface. Y / X is 0.5 to 30% of the area, when X is the average standing hair length of the ultrafine fibers of the standing hair, and Y is the average total average length of the width perpendicular to the longitudinal direction of each non-piling region. 1.5.

Description

technical field [0001] The present invention relates to a suede-like sheet used in applications such as surface materials for clothing, shoes, furniture, etc., and interior materials for vehicles, aircraft, etc., and a method for producing the same. Background technique [0002] Currently, there are known suede-like sheets as artificial leather similar to nubuck or suede. Generally speaking, the surface hair of the nubuck is short, and it has a damp or sticky wet touch. Compared with the nubuck, the surface hair of the suede is long, and the wet feeling is low. [0003] As a suede leather-like sheet, for example, the following Patent Document 1 discloses a leather sample sheet having a concavo-convex pattern formed on the surface of a substrate comprising a nonwoven fabric formed of ultrafine long fiber bundles and a non-woven fabric imparted to the inside thereof. Elastic polymer, the convex portion of the concave-convex pattern has napped fibers below 0.5 decitex (dtex), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/00D06C11/00
CPCD06C11/00D06N3/0011D06N3/0075D06N3/0077B29C59/025B29L2007/002B29L2031/765
Inventor 藤泽道宪桥本幸治
Owner KURARAY CO LTD