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Improved cost effective melt processing stabilization system for spunbond polypropylene fiber resin

IP.com Disclosure Number: IPCOM000010530D
Publication Date: 2002-Dec-12
Document File: 1 page(s) / 20K

Publishing Venue

The IP.com Prior Art Database

Abstract

New additive formulation for spunbond (SB) polypropylene (PP) has better melt processing stability than commercial SB grade formulation, based on melt flow (MF) and color control after multiple extrusion. The new formula also has improved peroxide cracking efficiency. The best mode improved formulation (A) is Irganox 3114 phenolic antioxidant (800 ppm), Ultranox 641 phosphite (745 ppm), acid acceptor like zinc oxide (200 ppm), and 550 ppm Luperox 101 peroxide to attain 38 MF in final pellet.

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Improved cost effective melt processing stabilization system for spunbond polypropylene fiber resin

New additive formulation for spunbond (SB) polypropylene (PP) has better melt processing stability than commercial SB grade formulation, based on melt flow (MF) and color control after multiple extrusion. The new formula also has improved peroxide cracking efficiency. The best mode� improved formulation (A) is Irganox 3114 phenolic antioxidant (800 ppm), Ultranox 641 phosphite (745 ppm),� acid acceptor like zinc oxide (200 ppm), and 550 ppm Luperox 101 peroxide to attain 38 MF in final pellet.

To reach the same melt flow� the new formulation (A) required about 10% less peroxide� than commercial SB formulation. A different formula D required more peroxide� � than commercial formulation to reach same MF. Formula D has 0.07% Genox EP amine oxide stabilizer and 0.03% ZnO. Cost of� new formula A is similar to commercial formulation. Formula D is of lower cost� than commercial formula. Two other formulations were identified with better processing stability than commercial resin, but their additive costs were higher� than that for commecial formulation.

The new furmula A reduces peroxide consumption, and less tertiary butyl alcohol (tBA) will be generated in pellet. This will allow� the plant to lower manufacturing cost and consistently meet regulatory requirement of maximum 100 ppm tBA. This formulation improvement will enhance the competitiveness of spunbond resin. The melt flow ra...