Method for production of synthetic yarn and yarn-like structures

Details Method for production of synthetic yarn and yarn-like structures Method for production of synthetic yarn and yarn-like structures

1982-01-18

1985-02-05

Mackey, Robert R.

Textiles: manufacturing

Thread finishing

Surface modification of running length

28254, 28273, 57 6, 57350, D02G 116, D02G 118

Patent

active

044970994

ABSTRACT:
Synthetic yarn and yarn-like structures are formed by the method of treating separate strands of thermoplastic material so that at least one has a shrinkage ratio higher than normal at an elevated temperature. The strands are fed forwardly at different rates of overfeed and intermingled in a gas stream with formation of loops on the strands, then heated to cause them to shrink differentially while being held to a predetermined length until shrinkage ceases. Apparatus for performing the method includes yarn drawing means, intermingling means comprising a jet device incorporating intersecting passages for the strands and for a gas under pressure, feeding means and heating and cooling means for the intermingled yarn downstream from the jet device, also means for holding the intermingled yarn to a predetermined length while it is being heated and cooled. Yarn produced by the method incorporates filaments at least some of which present bud-like projections inhibiting relative movement of the filaments.

REFERENCES:
patent: 3199281 (1965-08-01), Maerov et al.
patent: 3438193 (1969-04-01), Kosaka et al.
patent: 3780515 (1973-12-01), Waters
patent: 3812668 (1974-05-01), Wilson
patent: 3971202 (1976-07-01), Windley
patent: 4069657 (1978-01-01), Bascom et al.
patent: 4319447 (1982-03-01), Barron
patent: 4343071 (1982-08-01), Schroder

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