Patent ID: 6309988
Filing Date: 2001-10-30
Classification: A61L,C08L,D01F,D04H,Y10T

Abstract:
A biodisintegratable nonwoven material comprising a plurality of fibers of a thermoplastic composition, wherein the thermoplastic composition comprises:a. an aliphatic polyester polymer in a weight amount that is between about 45 to about 90 weight percent, wherein the aliphatic polyester polymer forms a substantially continuous phase;b. polyolefin microfibers in a weight amount that is between greater than 0 to about 45 weight percent, wherein the polyolefin microfibers have a diameter that is less than about 50 micrometers and the polyolefin microfibers form a substantially discontinuous phase encased within the aliphatic polyester polymer substantially continuous phase; andc. a compatibilizer, which exhibits a hydrophilic-lipophilic balance ratio that is between about 10 to about 40, in a weight amount that is between about 7 to about 25 weight percent, wherein all weight percents are based on the total weight amount of the aliphatic polyester polymer; the polyolefin microfibers, and the compatibilizer present in the thermoplastic composition.