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:
Jul. 15, 1986
Filed:
Apr. 29, 1985
Koichi Kono, Iruma, JP;
Shoichi Mori, Iruma, JP;
Kenji Miyasaka, Iruma, JP;
Jyoichi Tabuchi, Iruma, JP;
Toa Nenryo Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A polyethylene superthin film having a thickness of at most 3 .mu.m, a tensile modulus of at least 2000 kg/cm.sup.2, a breaking strength of at least 500 kg/cm.sup.2 and a haze of at most 10% is produced by heating and dissolving polyethylene having a weight average molecular weight of at least 5.times.10.sup.5 in a solvent, forming a gel sheet from the resulting solution, subjecting the gel sheet to a solvent removal treatment to adjust the amount of the solvent in the gel sheet to 10 to 80% by weight, heating and stretching the sheet, removing the residual solvent therefrom and then subjecting the stretched product to a compressing treatment at a temperature of at most the melting point of the polyethylene.