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METHOD FOR CONTROLLING EXPANSION RATIO OF FOAMED THERMOPLASTIC ELASTOMER, EXPANSION MOLDING OF THERMOPLASTIC ELASTOMER AND FOAMED THERMOPLASTIC ELASTOMER
METHOD FOR CONTROLLING EXPANSION RATIO OF FOAMED THERMOPLASTIC ELASTOMER, EXPANSION MOLDING OF THERMOPLASTIC ELASTOMER AND FOAMED THERMOPLASTIC ELASTOMER
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机译:发泡热塑性弹性体的膨胀比控制方法,热塑性弹性体和发泡热塑性弹性体的膨胀成型
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摘要
PURPOSE:To enable the control of expansion ratio of a foamed material in the foaming of a thermoplastic elastomer using water as a foaming agent preferable from the viewpoint of environment and cost by varying the melt ductility of the thermoplastic elastomer. CONSTITUTION:The expansion ratio of a foamed material is controlled in the foaming of a thermoplastic elastomer using water as a foaming agent by varying the melt ductility of the thermoplastic elastomer in a fluidized or plasticized state at the stage to generate or expand bubbles with steam preferably by adding a melt-ductility improving agent or varying the expansion foaming temperature. Concretely, e.g. in the case of using a polymer blend of PVC and a nitrobutadiene rubber as the thermoplastic elastomer, the expansion ratio of the elastomer can be varied by adding a polymer blend of polymethyl methacrylate and PVC as the melt-ductility improving agent.
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