| 摘要 |
<p>A one-piece short distance golf ball consists of a moulded mixture of a foamed thermoplastic polymer and a filler material and has an increasing density gradient from the centre to the surface. The ball is formed by injecting a mixture of thermoplastic polymer, filler material and chemical blowing agent into a golf ball mould cavity, holding the mixture in the mould cavity for a time, removing the ball, and then quenching it in water.</p> |
