Yarn which exhibits high tenacity comprised of thermotropic...

Details Yarn which exhibits high tenacity comprised of thermotropic... Yarn which exhibits high tenacity comprised of thermotropic...

D - Textiles, Paper

02

G

28/49, 8/93.24

D02G 3/48 (2006.01) D06M 13/16 (1985.01)

Patent

CA 1228957

ABSTRACT OF THE DISCLOSURE A yarn is provided which exhibits high tenacity com- prised of thermotropic liquid crystalline polymer fibers. Such yarn is produced by applying thereto a spin finish comprised of a thermally stable ester of a polyhydric alcohol and at least one saturated monobasic fatty acid having from 7 to 22 carbon atoms and subsequently thermally treating the same to increase the tenacity of the yarn by at least about 50 percent to at least about 12 grams/denier. The yarn can advantageously be formed into a tire cord without substantial loss of tenacity while retaining the desirable ability to adhere well to rubber. Particularly preferred surface finishes comprise pentaerythritol tetraisostearate and pentaerythritol tetrapelargonate. -1-

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