公开(公告)号：US20220010485A1

公开(公告)日：2022-01-13

申请号：US17440240

申请日：2020-03-17

Applicant: KURARAY CO., LTD.

Inventor： Tetsuya ASHIDA ,  Kansai HARA

IPC: D06N3/14 ,  B32B27/12 ,  B32B27/40 ,  B32B27/08 ,  B32B27/20 ,  D06N3/00 ,  B32B5/02

Abstract: Disclosed is a grain-finished leather-like sheet including: a fiber base material; a polyurethane intermediate layer stacked on the fiber base material; and a polyurethane skin film stacked directly on the polyurethane intermediate layer or via another polyurethane layer, wherein the polyurethane skin film contains a silicone-modified polyurethane, and the grain-finished leather-like sheet has an uneven surface whose skewness (Ssk), kurtosis (Sku), and maximum height (Sz) of surface roughness in accordance with ISO 25178 respectively satisfy −0.4≤Ssk≤−0.2, 3≤Sku≤4, 60 μm≤Sz≤150 μm.

公开(公告)号：US20230416982A1

公开(公告)日：2023-12-28

申请号：US18253122

申请日：2021-11-15

Applicant: Kuraray Co., Ltd.

Inventor： Tetsuya ASHIDA ,  Kansai Hara

IPC: D06N3/00 ,  A45F3/04 ,  D06N3/14

CPC classification number: D06N3/0063 ,  A45F3/04 ,  D06N3/0011 ,  D06N3/0043 ,  D06N3/0097 ,  D06N3/145 ,  D06N2201/0263 ,  D06N2201/0227 ,  D06N2203/068 ,  D06N2205/04 ,  D06N2209/0823 ,  D06N2209/0876 ,  D06N2213/03

Abstract: Disclosed is a leather-dike sheet including a fiber base material and a colored resin layer laminated on the fiber base material, wherein the colored resin layer includes an intermediate layer and a skin layer laminated on the intermediate layer, wherein the skin layer is a layer containing polyurethane and a black pigment of 3 g/m2 or more, and the intermediate layer is a layer containing polyurethane and a black pigment, and in the L*a*b* color system, a leather-like sheet having a lightness value of L*≤30 is used.

公开(公告)号：US20220186430A1

公开(公告)日：2022-06-16

申请号：US17440820

申请日：2020-03-11

Applicant: KURARAY CO., LTD.

Inventor： Tetsuya ASHIDA ,  Kansai HARA

IPC: D06N3/14 ,  D06N3/00

Abstract: Disclosed is a grain-finished leather-like sheet including: a fiber base material; and a polyurethane skin film stacked, as a surface layer, directly on the fiber base material or via another polyurethane layer, wherein the polyurethane skin film contains at least one of a diketopyrrolopyrrole-based red pigment and an α-type phthalocyanine-based blue pigment, the grain-finished leather-like sheet further includes a clear polyurethane film layer coating the polyurethane skin film, and the grain-finished leather-like sheet has a grade of color difference, determined using a Grey scale for assessing staining, of 4-5 or more, when 0.03 g of oleic acid is added dropwise to a surface of the clear polyurethane film layer, and thereafter a white cotton fabric is reciprocated 100 times on the surface, using a crockmeter.

公开(公告)号：US20210285152A1

公开(公告)日：2021-09-16

申请号：US17053268

申请日：2019-04-19

Applicant: KURARAY CO., LTD.

Inventor： Tetsuya ASHIDA ,  Kansai HARA

IPC: D06N3/14 ,  D06N3/00

Abstract: Disclosed is a grain-finished leather-like sheet including a polyurethane skin film containing a polyether-based polyurethane, wherein the polyurethane skin film contains a quinacridone-based red pigment, and is colored in a red color having an L* value of ≤80, an a* value of ≥20, and a b* value of ≤15 in an L*a*b* color system, and the number of cycles of a flexing endurance test at which cracking occurs in a surface of the polyurethane skin film is 100000 or more, when the flexing endurance test is performed on the grain-finished leather-like sheet under an environment of 20° C. using a flexometer after the grain-finished leather-like sheet has been irradiated with carbon arc at a black panel temperature of 63° C. for 100 hours with an irradiance of 500±50 W/m2, using ultraviolet carbon arc lamp light compliant with JIS B 7751.

公开(公告)号：US20160215444A1

公开(公告)日：2016-07-28

申请号：US15025788

申请日：2014-09-24

Applicant: KURARAY CO., LTD.

Inventor： Tetsuya ASHIDA ,  Osamu OGAWARA

IPC: D06N3/00

CPC classification number: D06N3/0075 ,  D06N3/0004 ,  D06N3/0011 ,  D06N3/183 ,  D06N2211/28 ,  D06N2213/03

Abstract: Disclosed is a production method of a napped artificial leather including the steps of: providing a fiber sheet including a non-woven fabric of ultrafine fibers with a fineness of 1 dtex or less that has been impregnated with a first elastic polymer; napping one or both surfaces of the fiber sheet to form a napped surface thereon; applying, to the napped surface, a resin solution containing a second elastic polymer having solubility in a predetermined solvent; and applying the predetermined solvent to the surface to which the resin solution is applied. Also disclosed is a napped artificial leather including a fiber sheet obtained by impregnating a first elastic polymer into a non-woven fabric that is an entangled body of ultrafine fibers with a fineness of 1 dtex or less, wherein the fiber sheet includes, on one or both surfaces thereof, a napped surface obtained by the ultrafine fibers, and a second elastic polymer is fixed to basal portions of the napped ultrafine fibers.

Abstract translation: 公开了一种起绒人造革的制造方法，包括以下步骤：提供包含浸渍有第一弹性聚合物的细度为1分特以下的超细纤维无纺布的纤维片; 使纤维片的一个或两个表面起绒以在其上形成起绒表面; 向起绒表面施加含有在预定溶剂中具有溶解性的第二弹性聚合物的树脂溶液; 并将预定溶剂施加到施加树脂溶液的表面上。 还公开了一种起绒人造革，其包括通过将第一弹性聚合物浸渍到细度为1分特或更低的超细纤维的缠结体的无纺布中而获得的纤维片，其中纤维片包括在一个或多个 两个表面，由超细纤维获得的起绒表面和第二弹性聚合物固定到起绒的超细纤维的基部。