Yarn with random denier fluctuations

Details Yarn with random denier fluctuations Yarn with random denier fluctuations

1969-11-06

1976-06-22

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Elements

428397, 428399, D02G 334, D01D 520

Patent

active

039642496

ABSTRACT:
A method of producing novel polyester yarns, threads or fabrics in which a previously unstretched melt-spun yarn such as polyethylene terephthalate is stretched upon a stationary heated stretching pin of a diameter of 15-60mm. and a pin temperature of 60.degree.-105.degree.C., the yarn being drawn at a stretching ratio of 60-80 percent of the normal ratio while placing the yarn under a thread tension after the pin of 0.2 to 1.1 grams/denier with a ratio of thread tension after the pin to that before the pin of 1:1.5 to 1.4. The resulting novel yarn is characterized by an elongation at breaking point of 30-80 percent, a boiling shrinkage capacity (at 100.degree.C. in water) of 20-50 percent and a large number of random denier fluctuations or variations per unit length of about 15-35 nodules per meter spaced at random intervals of about 0.5 to 8 centimeters. These yarns are particularly useful when fabricated into a textile structure and dyed, e.g. with basic dyes or dispersion dyes, so as to provide a different strength of dyeing as between the thicker and thinner portions of the yarn.

REFERENCES:
patent: 2975474 (1961-03-01), Smith
patent: 3117173 (1964-01-01), Adams
patent: 3127915 (1964-04-01), Bottomley
patent: 3275732 (1966-09-01), Macleod et al.
patent: 3363295 (1968-01-01), Allen
patent: 3422176 (1969-01-01), Jamison
patent: 3439489 (1969-04-01), Holton et al.

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