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:
Feb. 19, 1980
Filed:
Jul. 29, 1975
Applicant:
Inventors:
Shozo Ejima, Moriyamashi, JP;
Susumu Tomioka, Moriyamashi, JP;
Tadao Matsumoto, Moriyamashi, JP;
Naruaki Hane, Moriyamashi, JP;
Assignee:
Chisso Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D04H / ; D01F / ;
U.S. Cl.
CPC ...
156167 ; 156181 ; 156306 ; 264168 ; 264171 ; 2642108 ; 264D / ;
Abstract
A porous non-woven fabric having a good dimensional stability and uniformity is prepared from a web obtained by arranging side-by-side composite fibers alone or a blend thereof with another fibrous material into a web and heat-treating the resulting web at a specified temperature, said composite fibers having few naturally developed crimps and being obtained by stretching unstretched side-by-side composite fibers consisting of a polypropylene component and an olefin polymer component having a specified melting point and a specified melt flow rate.