Kuraray Co., Ltd.

Kao Soap Company, Ltd.

Takeo Nishimura

Kazundo Akamata

Kenichi Katabe

Mikihiro Matsui

Tomio Mizuse

Shunji Ishizaki

A leather-like sheet material resembling natural leather is provided which has a microporous surface and comprises a fibrous substrate layer (1) and a porous, skinless surface layer (2) having an apparent density of 0.25-0.48 g/cm.sup.3 with pores having an average diameter of 15-300 .mu.m being predominantly present therein. The surface layer (2) comprises polyurethane I in which the organic diisocyanate constituent is an aromatic ring-containing organic diisocyanate and the porous structure of at least the surface portion of the surface layer (2) is provided with polyurethane II prepared from an organic diisocyanate, which mainly comprises an aliphatic diisocyanate and/or an alicyclic diisocyanate, a polymer diol and a chain extender. The surface portion of the surface layer of the leather-like sheet material may be provided with a polyurethane coat layer which mainly comprises a fine particle polyurethane, or a coat layer made of a composition composed of a polyurethane, which mainly comprises a fine particle polyurethane and a polyoxyethylene- or glycerol-modified hardened oil.

Leather-like sheet materials and method of producing same

A leather-like sheet material having low slip characteristics comprising:

Leather-like sheet material having low slip characteristics

A leather-like sheet material bearing a remarkable resemblance to high-quality leathers of natural origin, especially in respect of flatness, bending crimp, grain and feeling, is produced by providing a substrate consisting of a fibrous base material and a porous coating layer with a thin layer of a polymer, subjecting the surface to a specific heat treatment, providing the resulting material with another thin layer of a polymer, and, if desired, embossing the material.

Method of producing a leather-like sheet material having a high-quality

A method of producing a leather-like sheet having a deluxe feeling is provided comprising preparing and fully curing a leather-like sheet comprising a porous substrate consisting of a porous layer of elastomer and/or a porous layer of fibrous material and a nonporous coating layer of elastomer coated in a thickness of 0.5 to 50 .mu. on the surface of said porous substrate, crumpling said fully cured sheet in the absence of tension in a liquid medium and, then, drying the crumpled sheet at a temperature not exceeding 100.degree. C. in the absence of tension.

Method of producing a leather-like sheet with a delicate appearance and

A leather-like sheet material is provided having a good pearl-like tint, said sheet material comprising a substrate comprising a fibrous mat and a porous coating layer of a polymer composed mainly of a polyurethane elastomer, a pearl layer having a thickness of 0.2 to 10.mu. and comprising a polymer composed mainly of a polyurethane elastomer and 3 to 500% by weight, based on the polymer, of a pearl pigment, and a colored layer having a thickness of 0.1 to 10.mu. and comprising a polymer composed mainly of a polyurethane elastomer and 1 to 300% by weight, based on the polymer, of a dyestuff and/or 1 to 600% by weight, based on the polymer, of a pigment.

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Okayama, Japan

Takeo Nishimura