1012461-A is referenced by 4 patents.

1,012,461. Treating polyester filaments. TOYO RAYON KABUSHIKI KAISHA. Aug. 20, 1963 [Aug. 29, 1962; Feb. 22, 1963], No. 32926/63. Heading B5B. An unoriented filament or fibre consisting of polyethylene terephthalate containing 0À01-25 mol per cent of a second component based on the recurring ethylene terephthalate unit, is stretched, heat treated at a temperature within the range 140 C. to a temperature 8 C. below the m.p. of the fibre while allowing contraction of 3-60% of its stretched length, and again stretched at a temperature of not more than 225 C. to an extent of at least 3% of its contracted length. Preferably, the initial stretching is carried out at 50-180 C. to an extent of 2À8-6À0 times the original length. Heating of the fibre may be effected by hot air, steam, liquid bath or a heated solid surface. Specification 735,171 is referred to.

Production of polyester yarn
Application Number
GB19630032926 19630820
Publication Number
1012461 (A)
Application Date
August 20, 1963
Publication Date
December 8, 1965
Toyo Rayon
D06P 07/00
D01F 06/62
C08G 63/00
D06P 07/00
D01F 06/62
C08G 63/692
C08G 63/688
C08G 63/672
C08G 63/60
C08G 63/181
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