Grain-finished leather-like sheet and evaluation method for grain-finished leather-like sheet
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United States of America
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Jan 14, 2025
Grant Date -
Jun 16, 2022
app pub date -
Mar 11, 2020
filing date -
Mar 11, 2020
priority date (Note) -
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status (Latency Note)
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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.
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