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US 7,462,386 B2Granted
Leather-like sheet and method for production thereof
AssigneeKuraray Co., Ltd.
InventorsTsuyoshi Yamasaki, Hidekazu Andoh, Yoshihiro Tamba
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AssigneeKuraray Co., Ltd.
InventorsTsuyoshi Yamasaki, Hidekazu Andoh, Yoshihiro Tamba
Estimating the term…
The leather-like sheet of the invention comprises a napped part of ultrafine fibers and a grainy part of nonporous elastic polymer randomly existing in the surface of a substrate prepared by infiltrating a porous polymer elastomer into a three-dimensionally intermingled nonwoven fabric of ultrafine fibers of not more than 0.5 dtex, and this is characterized in that the nonporous elastic polymer is infiltrated into the substrate to a depth thereof of from 5 to 20 μm from the surface of the substrate. The production method of the invention is for producing a nubuck-type leather-like sheet of good surface abrasion resistance. A grainy part of resin and ultrafine fibers and a part of the ultrafine fibers are mingled on the surface of the substrate, and the sheet has an elegant and three-dimensional appearance like natural leather.
An artificial leather sheet which comprises a napped part of ultrafine fibers and a grainy part of nonporous elastic polymer randomly existing in the surface of a substrate, wherein the grainy part may optionally include a portion of the napped ultrafine fibers taken into said nonporous elastic polymer, prepared by infiltrating a porous polymer elastomer into a three-dimensionally intermingled nonwoven fabric of ultrafine fibers of not more than 0.5 dtex, wherein the napped part and the grainy part are on the same surface of the substrate, wherein the nonporous elastic polymer is infiltrated into the substrate and is present from the surface of the substrate to a depth thereof of at least 5 μm and not more than 20 μm.
Dependencies are inferred from the claim text.