| 摘要 |
PURPOSE:To enable the precise filtering of hot water, by using a porous polyethylene hollow yarn wherein an apparent m.p. is set to a specific temp. range by the irradiation of electron beam and minute voids in the wall of the hollow yarn have a crossliked structure. CONSTITUTION:Crosslinking treatment is applied to a porous polyethylene hollow yarn by an electron beam irradiation apparatus to impart heat resistance thereto. By this method, the heat resistance porous polyetylene hollow yarn, wherein an apparent m.p. is set to 150-250 deg.C by the irradiation of electron beam and minute voids in the wall of the hollow yarn are mutually connected from the inner wall surface of the hollow yarn to the outer wall surface thereof and a laminate structure is imparted, is obtained. By using this hollow yarn, a usual module is prepared.
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