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:
Jan. 07, 1992
Filed:
May. 31, 1990
Applicant:
Inventors:
Takeshi Yanagihara, Kanagawa, JP;
Tsugio Honda, Kanagawa, JP;
Makoto Nakano, Kanagawa, JP;
Hiroshi Kajino, Kanagawa, JP;
Assignee:
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 41 ; 264 463 ; 264175 ; 264D / ;
Abstract
A porous waterproof film having a superior gas-permeability and waterproofness, capable of being produced under simple processing conditions, by means of simple processing equipments and at cheap cost, having superior mechanical strengths and also suitable for disposable use applications and a process for producing the film are provided, which film is obtained by subjecting a thermoplastic resin composition film comprising a thermoplastic resin and a specified quantity of a filler based on the thermoplastic resin to calender processing.