Polyvinyl alcohol based fibers
AssigneeKuraray Co., Ltd.
InventorsTomokazu Ise, Tetsuo Nishizaki, Toshihiro Hamada, Kiyohiko Sho
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Abstract
Polyvinyl alcohol based fibers having good fatigue resistance, dipped cords comprising the polyvinyl alcohol based fibers and having good fatigue resistance, and a method for producing the dipped cords. The polyvinyl alcohol based fibers have a tanδ at 90° C. of at least 0.12, substantially one peak of tanδ within a temperature range of from 60 to 120° C., and an elongation at break of at least 12%.
Claims20
Polyvinyl alcohol based fiber having
- (1) tanδ at 90° C. of at least 0.12,
- (2) substantially one peak of tanδ within a temperature range of from 60 to 120° C., and
- (3) elongation at break of at least 12%.
Dipped cord comprising polyvinyl alcohol based fiber bundles processed with a rubber adhesiveness improver, wherein said dipped cord has
- (1) tanδ at 90° C. of at least 0.12,
- (2) substantially one peak of tanδ within a temperature range of from 60 to 120° C., and
- (3) elongation at break of at least 10%.
A method for producing dipped cords having tanδ at 90° C. of at least 0.12, having substantially one peak of tanδ within a temperature range of from 60 to 120° C., and having a degree of elongation at break of at least 10%, which comprises applying a rubber adhesiveness improver to polyvinyl alcohol based fibers having a degree of elongation at break of at least 12%, then drying the fibers, and thereafter thermally treating the dried fibers at a temperature falling between 110 and 200° C. and under a tension of at least 0.1 cN/dtex.
Dependencies are inferred from the claim text.