Title: Mixed shrinkage yarn

Abstract: Mixed-shrinkage, continuous-filament, heat-bulkable yarn, composed of low and higher shrinking filaments of different polyester compositions, develops worstedlike bulk in fabric as a result of fabric finishing operations. The yarn is prepared from two ethylene terephthalate polyesters, of different compositions and relative viscosities, by cospinning, drawing and heat-setting the filaments under identical, critically-controlled conditions.

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Inventors: Reese, Cecil E. (Kinston, NC, US)

Application Number: 640775
Filing Date: 1975-12-15
Publication_date: 1976-12-21
Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)
Primary Class(es): 57/245 57/248, 57/908, 264/210.5, 264/235.6, 428/369
Other Classes:
US Patent Ref:

3199281	Aug, 1965	Maerov et al.	57/140.
3200576	Aug, 1965	Maerov et al.	57/140.
3416302	Dec, 1968	Knospe	57/140.
3593513	Jul, 1971	Reese	57/140.
3608296	Sep, 1971	Taylor	57/140.
3626442	Dec, 1971	Haseley et al.	57/140.
3705225	Dec, 1972	Taylor	264/210.

Other Refs:
Primary Examiner: Petrakes, John
Assistant Examiner:
Attorney: