Patent ID: 6921504
Filing Date: 2005-07-26
Classification: B32B,C08J,C08K,C09K,D01F,D02G,Y10T

Abstract:
1. A production method of a flame retarding polypropylene fiber, wherein 0.4% by weight or more of a hindered amine-based stabilizer and 0.5% by weight or more of a phosphoric ester-based flame retardant are mixed with a polypropylene resin having a melt flow rate value of 5 to 50 g/10 min. the mixture is melt-spun to form an undrawn yarn, and then the yarn is drafted at a drafting magnification of 2 to 7-fold and a drafting temperature of 50 to 100° C. and further set thermally at a temperature of 60 to 140° C.