Filaments or fibres of polyester drawable with molecular...

Details Filaments or fibres of polyester drawable with molecular... Filaments or fibres of polyester drawable with molecular...

D - Textiles, Paper

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D01D 1/00 (2006.01) D01F 6/62 (2006.01) D02G 1/18 (2006.01) D04H 1/42 (2006.01)

Patent

CA 1112032

-2- A B S T R A C T Filaments of polyester or fibres produced therefrom, drawable with molecular orientation and having a double refraction of from 0.004 to approximately 0.12 and an individual denier of less- than 2.5 dtex. A process for the production such filaments is provided in which undrawn filaments are permanently plastically extended while being passed through a water bath kept at a temperature of from 93 to 100°C and are then extended in a ratio of at least 1:3 by being spun at a take-off rate of not more than 2500 metres per minute. Such filaments can be used in the production of bulky mixed fibre yarns and non-woven fabrics.

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