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:
Mar. 18, 1997
Filed:
Dec. 12, 1994
Seizo Kobayashi, Yokohama, JP;
Kazutosi Nomiyama, Akishima, JP;
Yoshimu Iwanami, Yokohama, JP;
Sumio Yoshida, Yokohama, JP;
Kazuhiko Kurihara, Tokyo, JP;
Hiroshi Yazawa, Kunitachi, JP;
Nippon Oil Co., Ltd., Tokyo, JP;
Nippon Petrochemicals Co., Ltd., Tokyo, JP;
Polymer Processing Research Institute Ltd., Tokyo, JP;
Abstract
The present invention provides a prepreg obtained by stretching a material including, as a main component, an ultra-high-molecular-weight polyethylene having an intrinsic viscosity of 5-50 dl/g as measured at 135.degree. C. in decalin, to a total draw ratio of at least 20, subjecting the resulting stretched polyethylene material to a splitting treatment, and impregnating the resulting material with a thermosetting resin, and a process for producing said prepreg. The split stretched polyethylene material has improved adhesion to the impregnant resin and can be used as a good base material for prepreg.