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US 11,708,664 B2Granted
Synthetic leather and method for producing the same
AssigneeSeiren Co., Ltd.
InventorYusuke Wanibuchi
Life of this patent
Estimating the term…
Abstract
A synthetic leather comprising a substrate, a skin layer that is disposed on one main surface of the substrate, and an anti-stain layer that is disposed to cover the skin layer. The anti-stain layer contains a base resin that comprises silicon and a unit derived from a compound that has a urethane bond. In the anti-stain layer, a fluorine atom/silicon atom atomic ratio, which is a proportion of a fluorine atom to the silicon atom, is 0.01 or less. A first color difference ΔE1* between before and after a stain adhesion test performed on the synthetic leather rubbed under a specific condition is 5 or less.
Claims7
A synthetic leather comprising:
- a substrate;
- a skin layer that is disposed on one main surface of the substrate;
- and
- an anti-stain layer that is disposed to cover the skin layer,
- wherein the anti-stain layer contains a base resin;
- the base resin comprises a silicon atom and a unit derived from a polyurethane resin;
- in the anti-stain layer, a fluorine/silicon atomic ratio is 0.01 or less;
- and
- wherein the synthetic leather has a stain adhesion resistance characterized by a first color difference ΔE1* of 5 or less between a first synthetic leather and a second synthetic leather measured by using a spectrocolorimeter, wherein the first synthetic leather is the synthetic leather after abrading by subjecting the synthetic leather to 10000 double rubs at a cycle of 60 times/min under a load of 19.6 N with an abrasion distance of 140 mm in accordance with JASO M 403/88, and the second synthetic leather is a stained synthetic leather obtained by fixing the first synthetic leather to a martindale testing machine conforming to ISO 12947-1 and rubbing the first synthetic leather 500 times under a load 12 kPa by using an abrader to which a piece of denim whose water content has been adjusted to 65±2 mass % and that has a color difference ΔE* from the synthetic leather of 50 or more is attached;
- wherein the base resin further includes an acrylic resin-derived unit;
- wherein the silicon atom is a silicon atom derived from a modified silicone having a hydroxyl group and a phenolic hydroxyl group.
8 more elements
A method for producing a synthetic leather, the method comprising:
- a first preparation step of preparing a substrate and a skin layer resin composition;
- a second preparation step of preparing an anti-stain layer resin composition;
- a skin layer forming step of forming a skin layer that contains the skin layer resin composition on one main surface of the substrate;
- and
- an anti-stain layer forming step of forming an anti-stain layer that contains the anti-stain layer resin composition to cover the skin layer, wherein the anti-stain layer composition contains a base resin;
- the base resin comprises a silicon atom and a unit derived from a polyurethane resin;
- in the anti-stain layer, a fluorine/silicon atomic ratio is 0.01 or less;
- and
- wherein the synthetic leather has a stain adhesion resistance characterized by a first color difference AE1* of 5 or less between a first synthetic leather and a second synthetic leather measured by using a spectrocolorimeter, wherein the first synthetic leather is the synthetic leather after abrading by subjecting the synthetic leather to 10000 double rubs at a cycle of 60 times/min under a load of 19.6 N with an abrasion distance of 140 mm in accordance with JASO M 403/88, and the second synthetic leather is a stained synthetic leather obtained by fixing the first synthetic leather to a martindale testing machine conforming to ISO 12947-1 and rubbing the first synthetic leather 500 times under a load 12 kPa by using an abrader to which a piece of denim whose water content has been adjusted to 65±2 mass % and that has a color difference ΔE* from the synthetic leather of 50 or more is attached;
- wherein the base resin further includes an acrylic resin-derived unit;
- wherein the silicon atom is a silicon atom derived from a modified silicone having a hydroxyl group and a phenolic hydroxyl group.
8 more elements
Dependencies are inferred from the claim text.