Bulk yarns having improved elasticity and recovery, and processe

Details Bulk yarns having improved elasticity and recovery, and processe Bulk yarns having improved elasticity and recovery, and processe

1998-09-28

2000-08-22

Calvert, John J.

Textiles: manufacturing

Thread finishing

Surface modification of running length

28247, D02G 116, D02G 100

Patent

active

061052248

ABSTRACT:
Bulk yarns having improved elasticity and recovery and methods for their manufacture are described. A first embodiment of the invention involves providing a solution-dyed multifilament yarn of polybutylene terephthalate (PBT) and a multifilament yarn of a second thermoplastic polymer to an air jet texturizer such that the PBT component forms a core and the other yarn forms a plurality of loops and coils extending outwardly from the core. In addition to a high degree of elasticity and recovery, the composite yarn also has a low amount of shrinkage, which enables the yarns to be used in the production of woven fabrics without significant losses in fabric yield. Another embodiment of the invention involves false twisting a multifilament PBT yarn and a second multifilament yarn as individual threadlines to impart crimp thereto, then entangling the two components together using an air interlacing jet, to produce a bulk yarn having high elasticity and recovery. Because the two components have different optimal draw ratios, the process involves the simultaneous drawing of the components at different draw ratios such as by running different diameter first delivery rolls for the respective components on the first delivery shaft of the machine. Alternatively, a supplemental individually-controllable first delivery shaft can be provided on the machine for feeding one of the components at a different speed from the other, to thereby draw the components at different ratios relative to each other. The thus-crimped yarns are then entangled together using an air entanglement jet, to produce a bulk yarn having high elasticity and recovery.

REFERENCES:
patent: 3434278 (1969-03-01), Martin et al.
patent: 3523416 (1970-08-01), Wolf
patent: 3534540 (1970-10-01), Collingwood et al.
patent: 3593513 (1971-07-01), Reese
patent: 3681910 (1972-08-01), Reese
patent: 3940917 (1976-03-01), Strachan
patent: 3948033 (1976-04-01), Henstock et al.
patent: 3959962 (1976-06-01), Wilding
patent: 3991548 (1976-11-01), Toronyi et al.
patent: 4180968 (1980-01-01), White
patent: 4295329 (1981-10-01), Windley
patent: 4452160 (1984-06-01), Tajiri et al.
patent: 4755336 (1988-07-01), Deeg et al.
patent: 4877572 (1989-10-01), Clarke et al.
patent: 4894894 (1990-01-01), Coons, III et al.
patent: 5008992 (1991-04-01), Gehrmann et al.
patent: 5014404 (1991-05-01), Smith
patent: 5213733 (1993-05-01), Hwu et al.
patent: 5359759 (1994-11-01), Jacob et al.
patent: 5389327 (1995-02-01), Longhi
patent: 5391703 (1995-02-01), Lin
patent: 5804115 (1998-09-01), Burton et al.
patent: 5811040 (1998-09-01), Mallonee

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