| abstract |
An object of the present invention is to provide a polyamide 56 fiber which is also suitable for a rubber reinforcing cord. More specifically, it is to provide a polyamide 56 fiber having a high elastic modulus even after being exposed to heat, excellent rubber adhesion, and high strength. And it is providing the rubber reinforcement cord which consists of this polyamide 56 fiber, and the reinforcement rubber containing this rubber reinforcement cord. A polyamide 56 fiber having an elongation of 12 to 20% at 4.68 cN / dtex stress after a dry heat treatment at 150 ° C. for 30 minutes. [Selection figure] None |