Grain-finished leather-like sheet
AssigneeKuraray Co., Ltd.
InventorsTetsuya Ashida, Kansai Hara
Life of this patent
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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.
Claims17
A grain-finished leather-like sheet comprising:
- 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 comprises a silicone-modified polyurethane, and
- the grain-finished leather-like sheet has an uneven surface whose maximum height (Sz), skewness (Ssk), and kurtosis (Sku) of surface roughness in accordance with ISO 25178 respectively satisfy 60 μm≤Sz≤150 μm, −0.4≤Ssk≤−0.2, and 3≤Sku≤4.
Dependencies are inferred from the claim text.