Process for the formation of high strength bio-absorbable...

Details Process for the formation of high strength bio-absorbable... Process for the formation of high strength bio-absorbable...

2002-06-25

2008-05-27

Tentoni, Leo B. (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S211220

Reexamination Certificate

active

07378045

ABSTRACT:
A PGA/PLA copolymer suture fiber having a fiber tenacity of between approximately 7.2 to 8.0 grams per denier and a fiber elongation between approximately 22% and 35% is produced by a process that utilizes extruder apparatus having at least one heated zone that is maintained at a temperature of from about 20° C. below the copolymer melting point to about 5° C. above the copolymer melting point, a metering pump and a heated block that are maintained at a temperature of no more than about 40° C. above the copolymer melting point, a spinneret that is maintained at a temperature of from about 40° C. to about 60° C. above the copolymer melting point, and an elongated heated sleeve extending between six and twenty inches from the spinneret that is maintained at a temperature of at least about 60° C. above the copolymer melting point.

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