POLYAMIDE MULTIFILAMENT FIBER AND TIRE CORD INCLUDING SAID FIBER
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Jan 6, 2015
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Jan 8, 2014
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Provided are: a polyamide multifilament fiber comprising a polycondensate of a diamine and a dicarboxylic acid including an alicyclic dicarboxylic acid, and fulfilling conditions (a), (b), and (c); a cord including the fiber; a fabric comprising said cord; and a tire applying said fabric to the cap ply thereof, (a): the ratio of alicyclic dicarboxylic acid to dicarboxylic acid being at least 50 mol %. (b): the total fineness of the polyamide multifilament fiber being at least 100 dtex. (c): the cross ratio (maximum diameter/minimum diameter) of the polyamide multifilament fiber being no more than 1.7). This polyamide multifilament fiber is high-Tg and high strength and has excellent spinning strength and fiber uniformity. The tire cord using same has excellent rubber adhesion properties and is capable of applying good dimensional stability to the tire at high temperatures.
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