Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Forming continuous work followed by cutting
Patent
1979-07-16
1981-11-17
Kendell, Lorraine T.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Forming continuous work followed by cutting
264168, 2642105, 2642108, 428364, 428369, 428371, B29C 1700, D01D 522, D02G 300
Patent
active
043011020
ABSTRACT:
A process is provided for preparing self-crimpable monocomponent fibers by the sequential steps of melt-spinning a polymer of polyhexamethylene adipamide or polycaproamide into filaments, quenching the filaments by a cross-flow of air to an average surface temperature of about 40.degree. to 130.degree. C., applying an effective amount of water to the filaments while they are in said temperature range, and then drawing the filaments at a draw ratio of at least 1.3:1 to obtain a tenacity of at least 1.3 gpd, a break elongation of less than 120% and a latent, substantially helical, frequently reversing crimp of at least 6 filament crimp index. The novel products of the invention, which include fibers and yarns, in self-crimpable or crimped condition, are particularly suited for use in carpets.
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Fernstrom George A.
Hebeler Harold H.
Lin Perry H.
Moneymaker Robert R.
E. I. Du Pont de Nemours and Company
Kendell Lorraine T.
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