Dimensionally stable polyester yarn for highly dimensionally...

Details Dimensionally stable polyester yarn for highly dimensionally... Dimensionally stable polyester yarn for highly dimensionally...

D - Textiles, Paper

01

F

18/624

D01F 6/16 (2006.01) B60C 9/00 (2006.01) D01F 6/62 (2006.01) D02G 3/48 (2006.01)

Patent

CA 1335031

Polyethylene terephthalate yarn is prepared by spinning under very high-stress conditions wherein oriented-crystalline undrawn yarns are obtained. Selection of process parameters yields a partially oriented semicrystalline undrawn yarn with a crystallinity of 16 to 24 percent and a melting point elevation of 14 to 22°C which is drawn to produce the resulting unique combination of properties: (A) a terminal modulus of at least 20 g/d, (B) a dimensional stability defined by E4.5 +FS <11.5 percent, (C) a tenacity of at least 5 grams per denier, (D) a melting point elevation of 14 to 22°C, preferably 17 to 20°C, and (E) an amorphous orientation function of less than 0.75. The resulting treated tire cord unexpectedly provides high ultimate elongation and high toughness in combination with improved dimensional stability.

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