| 摘要 |
PURPOSE:To improve a blocking resistance by laminating a denatured thermoplastic polyurethane elastomer including a specified quantity of resin etc. for preventing blocking on both inside and outside surfaces of a tube formed with mainly a thermoplastic polyurethane elastomer. CONSTITUTION:The two wheeler multi-layer tube 1 is formed by laminating layers 3a and 3b composed of a denatured thermoplastic polyurethane elastomer having an excellent blocking resistance on both inside and outside surfaces of an intermediate layer 2 formed mainly with a thermoplastic polyurethane elastomer. And the denatured thermoplastic polyurethane elastomer includes resin for preventing blocking, which includes 3-50wt.% of one or more than one kinds of resin selected from groups of a polyolefine-system resin, vinyl chloride-system resin, and polyester-system resin etc. Or, the denatured thermoplastic polyurethane elastomer is to include 0.01-10wt.% of an inorganic-system filler and/or an additive material for preventing blocking of wax etc., also to have more than 60 deg.C of a blocking resistance measured in accordance with JISZ1515.
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