Leather-like sheet
AssigneeKuraray Co., Ltd.
InventorMasato Warita
Life of this patent
Estimating the term…
Abstract
A leather-like sheet includes: a fiber base material; an intermediate resin layer stacked on one surface of the fiber base material; and a surface resin layer stacked on the intermediate resin layer. The surface resin layer contains a polyether-based polyurethane and spherical fine particles having a heat resistance at 200° C., and has a content ratio of the spherical fine particles of 5 to 40 mass %. The spherical fine particles have a specific heat of 0.95 kJ/(kg·K) or more, a particle size D50 (median diameter) at a cumulative distribution of 50 vol %, of 2.5 to 10 μm, and a particle size D10 at a cumulative distribution of 10 vol % of the spherical fine particles which satisfies a condition that a particle size dispersity D50/D10≤3.
Claims6
A leather-like sheet, comprising:
- a fiber base material;
- an intermediate resin layer stacked on one surface of the fiber base material;
- and
- a surface resin layer stacked on the intermediate resin layer,
- wherein the surface resin layer comprises a polyether-based polyurethane and spherical fine particles having a heat resistance at 200° C., and a content ratio of the spherical fine particles is 5 to 40 mass %, and
- the spherical fine particles has a specific heat of 0.95 KJ/(kg·K) or more, and a particle size D50 (median diameter) at a cumulative distribution of 50 vol %, of 2.5 to 10 μm, and a particle size D10 at a cumulative distribution of 10 vol % of the spherical fine particles satisfies a condition that a particle size dispersity D50/D10≤3 wherein the spherical fine particles comprise melamine resin-silica composite particles.
Dependencies are inferred from the claim text.