Foam composition, foam member and method of manufacture
AssigneeBridgestone Sports Co., Ltd.
InventorKatsunobu Mochizuki
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Abstract
A foam composition that includes a polymer material such as polyurethane or polyurea and a leachable water-soluble fine powder is provided. This composition can be used in a relatively simple process to obtain a foam body (porous body) that is uniform only at the surface or uniform throughout. The foam body can be suitably used as a golf ball member in golf balls required to have good controllability on approach shots. Also provided is a method for producing a foam member, which method includes the steps of molding the foam composition to obtain a solid molded body, and then leaching out and removing the water-soluble fine powder so as to obtain a foam-molded body.
Claims8
A method for producing a porous member, which method comprises the steps of, in order:
- molding a polymer composition comprising a polymer material and a leachable water-soluble fine powder so as to obtain a solid molded body;
- and
- leaching out and removing the water-soluble fine powder by water, thereby giving a porous molded body, wherein the polymer material is a thermoplastic polyurethane elastomer, the water-soluble fine powder has an average particle size of from 1 to 800 μm, the water-soluble powder has a solubility in water of at least 1 g per 100 g of water at 20° C., the content of the water-soluble fine powder is from 1 to 30 parts by weight per 100 parts by weight of the thermoplastic polyurethane elastomer, and the porous member is a golf ball cover.
Dependencies are inferred from the claim text.