Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Using sonic – supersonic – or ultrasonic energy
Reexamination Certificate
2005-03-29
2005-03-29
Tentoni, Leo B. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Using sonic, supersonic, or ultrasonic energy
C019S098000, C019S145700, C028S100000, C028S263000, C156S062400, C156S073200, C264S103000, C264S143000, C264S168000, C264S171100, C264S210200, C264S210700, C264S210800, C264S211140, C264S3420RE
Reexamination Certificate
active
06872352
ABSTRACT:
The invention relates to webs or batts including polytrimethylene terephthalate crimped staple fibers and fiberfill products comprising such webs and batts, as well as the processes of making the staple fibers, webs, batts and fiberfill products. According to the preferred process of making a web or batt, polytrimethylene terephthalate staple fibers, containing polytrimethylene terephthalate is melt spun at a temperature of 245-285° C. into filaments. The filaments are quenched, drawn and mechanically crimped to a crimp level of 8-30 crimps per inch (3-12 crimps/cm). The crimped filaments are relaxed at a temperature of 50-130° C. and then cut into staple fibers having a length of about 0.2-6 inches (about 0.5-about 15 cm). A web is formed by garnetting or carding the staple fibers and is optionally cross-lapped to form a batt. A fiberfill product is prepared with the web or batt.
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Hernandez Ismael A.
Hietpas Geoffrey David
Howell James M.
E. I. du Pont de Nemours and Company
Kuller Mark D.
Tentoni Leo B.
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