Patent ID: 6506873
Filing Date: 2003-01-14
Classification: B29B,D01F,D04H,Y10T

Abstract:
A fibrous material comprising:a plurality of polylactide containing fibers prepared from a polylactide composition containing polylactide having less than about 5 wt. % R-lactic acid residues, a lactide concentration of less than about 0.5 wt. % , and a number average molecular weight of between about 25,000 and about 150,000; said plurality of polylactide containing fibers exhibiting a crystallinity of greater than 20 J/g, a tenacity of greater than 1.5 grams/denier, and an average fiber boiling water shrinkage propensity of less than about 15%; and wherein said plurality of polylactide containing fibers are prepared by spunbonding the polylactide composition at a fiber velocity of between about 1,000 and about 10,000 m/min., a throughput of between about 0.3 and about 3 g/min/capillary, and a temperature of between about 200Â° C. and about 250Â° C. and are deposited as a web.