The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 1997
Filed:
Sep. 19, 1994
Yasuo Kasahara, Tokyo, JP;
Riken Vinyl Industry Co., Ltd., Tokyo, JP;
Abstract
A method for preparing polyvinyl chloride sheets for membrane press forming which comprises contact bonding of a preheated first polyvinyl chloride sheet on the heating drum, contact bonding of at least one other layer of preheated polyvinyl chloride sheet thereon, contact bonding of a transfer film thereon and embossing by emboss-roll thereon, wherein said transfer film has a laminated structure comprising a polyester film, a release coat layer, a resin coat layer and a hot melt coat layer successively from the surface layer. The method of the present invention provides a sheet for membrane press forming which has excellent stain and scratch resistance. Furthermore, after this sheets is subjected to overlay-laminate forming on materials such as plywood and the like, splendid forms can be obtained without surface cracks caused by expansion.