Invention Grant
- Patent Title: Grain-finished leather-like sheet
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Application No.: US17440240Application Date: 2020-03-17
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Publication No.: US11643773B2Publication Date: 2023-05-09
- Inventor: Tetsuya Ashida , Kansai Hara
- Applicant: KURARAY CO., LTD.
- Applicant Address: JP Kurashiki
- Assignee: KURARAY CO., LTD.
- Current Assignee: KURARAY CO., LTD.
- Current Assignee Address: JP Kurashiki
- Agency: Element IP, PLC
- Priority: JP 2019072652 2019.04.05
- International Application: PCT/JP2020/011609 2020.03.17
- International Announcement: WO2020/203243A 2020.10.08
- Date entered country: 2021-09-17
- Main IPC: B32B27/12
- IPC: B32B27/12 ; D06N3/14 ; B32B5/02 ; B32B27/08 ; B32B27/20 ; B32B27/40 ; D06N3/00

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.
Public/Granted literature
- US20220010485A1 GRAIN-FINISHED LEATHER-LIKE SHEET Public/Granted day:2022-01-13
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