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:
Apr. 21, 1992
Filed:
Apr. 27, 1990
Keizo Kobayashi, Yokohama, JP;
Takashi Mizoe, Yokohama, JP;
Yoshimu Iwanami, Yokohama, JP;
Shigeki Yokoyama, Yokohama, JP;
Keiji Jimbo, Yokosuka, JP;
Kazuhiko Kurihara, Tokyo, JP;
Hiroshi Yazawa, Kunitachi, JP;
Mihoko Okada, Tokyo, JP;
Nippon Oil Co., Ltd., Tokyo, JP;
Nippon Petrochemicals Co., Ltd., Tokyo, JP;
Polymer Processing Research, Tokyo, JP;
Abstract
A method for the continuous preparation of a polyethylene having high strength and high modulus of elasticity is here disclosed which comprises the steps of mixing 100 parts by weight of an ultra-high-molecular-weight polyethylene powder having an intrinsic viscosity of 5 to 50 dl/g in decalin at 135.degree. C. with 2 to 50 parts by weight of a liquid organic compound having a boiling point higher than the melting point of the polyethylene, feeding the resulting mixture to between a pair of upper and lower endless belts facing each other, continuously compression-molding the mixture at a temperature less than the melting point of the mixture by pressing means disposed inside the endless belts, and rolling and then drawing the same.