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AssigneeToyo Boseki Kabushiki Kaisha
InventorsShigenori Nagahara, Kenji Yoshino, Satoshi Imahashi, Noriko Takahashi
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[Object]To prepare a polyester fiber and fiber cord having an excellent heat resistance which does not generate thermal melting at high temperature while properties such as dimensional stability, high strength and durability are maintained. To provide a material which is useful as a belt for tire and a carcass material. [Means to Solve]A polyester fiber and fiber cord comprising a copolymerized polyester is impregnated with a compound having at least two unsaturated bonds, and is irradiated with electronic ray or γ-ray, whereby the compound causes a cross-linking reaction in the inner area and surface layer of the polyester fiber and fiber cord, which results in a fiber and fiber cord having an excellent heat resistance.
A heat-resistant cross-linking polyester fiber which is characterized in that said fiber is prepared by such a manner that, after non-drawn polyester yarn and/or drawn polyester yarn prepared by melt spinning of a copolymerized polyester are/is impregnated with a compound having at least two unsaturated bonds in a molecule, they/it are/is irradiated with active ray.
A heat-resistant cross-linking polyester fiber cord which is characterized in that said cord is prepared by such a manner that, after a polyester fiber cord comprising a copolymerized polyester is impregnated with a compound having at least two unsaturated bonds in a molecule, it is irradiated with active ray.
Dependencies are inferred from the claim text.