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. 26, 2005
Filed:
Oct. 21, 2002
Applicants:
Yoshishige Shimizu, Toyohashi, JP;
Hiroshi Yamamoto, Toyohashi, JP;
Hideo Sakakura, Toyohashi, JP;
Inventors:
Assignee:
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
D01D005/12 ; D01D005/34 ; D01D010/02 ; D01F001/07 ; D01F006/06 ;
U.S. Cl.
CPC ...
Abstract
A method for producing a flame retarding polypropylene fiber having both good flame retardancy and good fiber strength, and which generates no toxic gas, includes mixing 0.4% by wt. or more of a hindered amine-based stabilizer and 0.5% by wt. or more of a phosphoric ester-based flame retardant with a polypropylene resin having an MPR of 5 to 50 g/10 min, melt-spinning the mixture to form an undrawn yarn, drafting the yarn at a drafting magnification of 2 to 7 fold and a drafting temperature of 50 to 100° C., and further thermally setting at 60 to 140° C.