Biodegradable filament nonwoven fabrics and method of manufacturing the same
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United States of America Patent
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Nov 18, 1997
Grant Date -
N/A
app pub date -
Feb 20, 1996
filing date -
Mar 8, 1995
priority date (Note) -
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Abstract
A biodegradable filament nonwoven fabric comprising a nonwoven web made up of filaments, each filament comprising a high melting point component composed of a first aliphatic polyester having biodegradability and a low melting point component composed of a second aliphatic polyester having biodegradability with a melting point lower than that of the high melting point component, the nonwoven web processed to a predetermined nonwoven fabric configuration. At least one of the high melting point component and the low melting point component is arranged in a plurality of divisions within the cross section of the filament. Both the high melting point component and the low melting point component extend continuously in the axial direction of the filament and are exposed on the surface of the filament. A method for manufacturing the biodegradable filament nonwoven fabric is also disclosed herein.
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