Back to results
US 9,932,705 B2Granted
Sheet-like material and method for producing same
AssigneeToray Industries, Inc.
InventorsGen Koide, Katsufumi Yanai
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeToray Industries, Inc.
InventorsGen Koide, Katsufumi Yanai
Estimating the term…
Disclosed is a sheet-like material which is produced by an environmentally friendly procedure and has an elegant appearance with piloerection, good wear resistance and good texture. Specifically disclosed is a sheet-like material containing a water-dispersed polyurethane within a fibrous base that contains extra-fine fibers having an average single fiber diameter of 0.3-7 um. The inside of the water-dispersed polyurethane is provided with pores each having a diameter of 10-200 um. Also specifically disclosed is a method for producing a sheet-like material by applying a polyurethane liquid to a fibrous base, wherein the polyurethane liquid is a water-dispersed polyurethane liquid that contains a foaming agent and a dry film of the polyurethane that constitutes the polyurethane liquid has a 100% modulus of 3-8 MPa.
A sheet-like material comprising polyurethane provided with a coagulation of water-dispersed polyurethane, wherein the polyurethane is contained in a fibrous base formed of extra-fine fibers with an average single fiber diameter of 0.3 - 7 μm, wherein the polyurethane contains pores with a diameter of 10 - 200 μm, and wherein the polyurethane is uniformly distributed across a thickness direction of the fibrous base.
Dependencies are inferred from the claim text.