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AssigneeE. I. Du Pont de Nemours and Company
InventorsGeorge A. Fernstrom, Harold H. Hebeler, Perry H. Lin, Robert R. Moneymaker
Estimating the term…
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.
In a process for preparing self-crimpable monocomponent fibers, the process being of the type which comprises in sequence the steps of melt-spinning a polymer of polyhexamethylene adipamide or polycaproamide into filaments, air-quenching the filaments, contacting the filaments with water and then drawing the filaments, the improvement comprising:
Dependencies are inferred from the claim text.