Ball and method of making same
作者： Jr. Jesse H. Heald
DOI:
关键词: Core (manufacturing) 、 Mold 、 Composite material 、 Ball (bearing) 、 Materials science 、 Polyurethane 、 Resilience (materials science) 、 Catalysis 、 Isocyanate
摘要: A ball is disclosed formed with a spherical core of polyurethane foam covered thin winding cotton yarn and hand stitched outer cover; the in mold by providing polymeric isocyanate mixture water polyol crosslinking catalyst ratio between being variable to provide desired weight, resilience density so that method can duplicate such characteristics as found regulation baseballs softballs, for example.
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