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AssigneeJsp Corporation
InventorsTatsuya HAYASHI, Nobumasa KOSHITA, Masaharu OIKAWA
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An in-mold molded article of expanded thermoplastic polyurethane beads containing a colorant, wherein when an average surface cell wall thickness of the in-mold molded article is 20 μm or more, the expanded TPU beads molded article is high in uniformity of color and good in color developing properties. Expanded thermoplastic polyurethane beads containing a colorant, wherein when an apparent density of the expanded beads is 80 to 300 kg/m3, an average cell diameter of the expanded beads is 100 to 400 μm, and an average surface cell wall thickness of the expanded beads is 15 μm or more, a molded article resulting from in-mold molding of the expanded beads is suppressed in color unevenness and has high uniformity of color.
An expanded thermoplastic polyurethane beads molded article that is an in -mold molded article of expanded thermoplastic polyurethane beads containing a colorant, wherein an average surface cell wall thickness of the molded article is 20 μm or more.
A method for producing an expanded thermoplastic polyurethane beads molded article, comprising subjecting expanded thermoplastic polyurethane beads containing a colorant to in-mold molding to produce an expanded beads molded article, wherein an average surface cell wall thickness of the expanded beads is less than 15 μm, and at the time of in-mold molding, and the expanded beads are heated with steam having a temperature of higher than ((melting temperature Tm)—25)° C. and not higher than the (melting temperature Tm)° C. of thermoplastic polyurethane constituting the expanded beads, thereby regulating an average surface cell wall thickness of the expanded beads molded article to 20 μm or more.
A method for producing an expanded thermoplastic polyurethane beads molded article, comprising subjecting expanded thermoplastic polyurethane beads containing a colorant to in-mold molding to produce an expanded beads molded article, wherein an average surface cell wall thickness of the expanded beads is 15 μm or more.
Expanded thermoplastic polyurethane beads that are expanded thermoplastic polyurethane beads containing a colorant, wherein an apparent density of the expanded beads is from 80 to 300 kg/m3, an average cell diameter of the expanded beads is from 100 to 400 μm, and an average surface cell wall thickness of the expanded beads is 15 μmam or more.
Dependencies are inferred from the claim text.