D - Textiles, Paper
01
D
18/622
D01D 5/12 (2006.01) D01D 5/22 (2006.01) D02G 1/16 (2006.01)
Patent
CA 1104777
ABSTRACT OF THE DISCLOSURE The disclosure relates to cospinning and drawing polyester filaments to produce a composite yarn which develops bulk due to differential shrinkage of the filaments when heated. Filaments of ethylene terephthalate synthetic linear condensa- tion polymer are melt spun to form two separate filament bundles, a water-based spin finish is applied to the filaments of one bundle and a substantially non-volatile spin finish is applied to filaments of the other filament bundle, the filament bundles are drawn under identical treatment conditions during passage along separate paths and the filaments are then com- bined and intermingled during passage around draw rolls, The product is a mixed-shrinkage yarn wherein the filaments treated with aqueous-based finish have a higher heat-shrinkage than the filaments treated with non-volatile finish, even though both are otherwise processed in the same manner.
314275
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
LandOfFree
Process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-687096