Method of production of a plastic laminate
AssigneeNippon Zeon Co., Ltd.
InventorsKouitu Kitazawa, Eitaro Nakamura
Life of this patent
Estimating the term…
Abstract
A method of production of a plastic laminate having a protective layer on a foamed layer comprising coating plastisol containing a vinyl chloride resin or an acrylic resin having epoxy group and having average particle diameter of 0.05 to 5 mm and plasticizer as the essential components on the surface of vinyl chloride resin layer containing an organic foaming agent, then forming the combined layers by heating and foaming is provided. A plastic laminate having a protective layer of polyvinyl chloride having excellent surface strength, abrasion resistance and resistance to chemicals on a foamed layer can be produced efficiently.
Claims17
A method of production of a plastic laminate which comprises the steps of forming a foamable but unfoamed substrate by molding a vinyl chloride resin composition containing an organic foaming agent at a temperature lower than the decomposition temperature of the organic foaming agent;
- coating the surface of the thus-formed substrate with a plastisol comprising an epoxy group-containing polyvinyl chloride resin or an epoxy group-containing acrylic resin, said resin having an average particle diameter in the range of 0.05 to 5 .mu.m;
- and then converting the thus-coated substrate into a foamed layer having a crosslinked protective layer on the surface thereof by heating the thus-coated unfoamed substrate to a temperature equal to or higher than the decomposition temperature of the organic foaming agent.
A method of production of a plastic laminate which comprises the steps of molding of a vinyl chloride resin plastisol composition containing an organic foaming agent at a temperature lower than the decomposition temperature of the organic foaming agent to form an unfoamed substrate;
- coating the surface of the thus-formed substrate with a plastisol comprising an epoxy group-containing acrylic resin having an average particle diameter in the range of 0.05 to 5 .mu.m;
- and then converting the thus-coated substrate into a foamed layer having a crosslinked protective layer on the surface thereof by heating the thus-coated unfoamed substrate to a temperature equal to or higher than the decomposition temperature of the organic foaming agent.
Dependencies are inferred from the claim text.