Patent ID: 8491825
Filing Date: 2013-07-23
Classification: B01D,D01F,Y10T

Abstract:
1. A method of producing natural tourmaline anion fiber comprising 70% to 95% by gross weight of a polypropylene having a molecular weight of 3.15×10 5 g/mole or a polyethylene having a molecular weight of 1.5×10 5 to 2.5×10 5 g/mole, 5% to 30% by gross weight of submicrometer tourmaline particles and 1 to 40% by gross weight of thermoplastic elastomer (TPE) or ethylene propylene diene rubber (EPDM), wherein the method comprises the steps of: mixing and granulating submicrometer tourmaline particles and polypropylene chips or a polyethylene chips via a twin-screw mixer to prepare an agglomerate containing 1 to 10% by gross weight of submicrometer tourmaline particles; melting and spinning the agglomerate at a temperature of 250° C. to 300° C. to form a spun fiber, and then cooling the spun fiber; and thermal stretching at 100° C. and thermal forming at 90° C., to obtain the natural tourmaline anion fiber.