作者: Scott H. Stillinger
DOI:
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摘要: Enhanced-grip foamed play balls, such as compressible, balls that are at least substantially formed from a material and which include an exterior surface is partially the discrete regions of different provides grip-enhancing structure. In some embodiments, structure elastomer. has one greater friction, density, weight, increased tackiness, decreased porosity, tread structure, projecting and/or compressibility than material. Methods for forming with structures also disclosed.