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    Ball for play, therapy and sports training and method of manufacture
    1.
    发明授权
    Ball for play, therapy and sports training and method of manufacture 失效
    玩球，治疗和运动训练的球和制造方法

    公开(公告)号：US5433438A

    公开(公告)日：1995-07-18

    申请号：US291730

    申请日：1994-08-16

    申请人： Neil Gilman

    发明人： Neil Gilman

    IPC分类号： A63B37/02 ,  B29C33/10 ,  B29C33/56 ,  B29C41/04 ,  B29C44/04

    CPC分类号： B29C44/04 ,  A63B37/02 ,  A63B2208/12 ,  B29C33/10 ,  B29C33/56 ,  B29C41/042

    摘要： A ball is provided which includes a rigid core surrounded by an outer layer of foamed polyurethane. The core and outer layer are preferably both integral spheres, i.e. are not formed from separate hemispheres.In preferred embodiments, the core is expanded polystyrene, and the outer layer is formed of an integral skin foam, i.e., a foam having a smooth non-porous skin over a microcellular open cell foam, and the foam is the reaction product of a MDI prepolymer, e.g., diphenylmethane diisocyanate prepolymer, and a urethane resin.

    摘要翻译： 提供一种球，其包括由发泡聚氨酯的外层包围的刚性芯。 核心层和外层层优选是一体的球体，即不由单独的半球形成。 在优选的实施方案中，芯是发泡聚苯乙烯，并且外层由整体表皮泡沫形成，即在微细孔开孔泡沫上具有光滑无孔表皮的泡沫，泡沫是MDI的反应产物 预聚物，例如二苯基甲烷二异氰酸酯预聚物和聚氨酯树脂。