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    • 7. 发明授权
    • Method for the production of golf ball
    • 生产高尔夫球的方法
    • US07622065B2
    • 2009-11-24
    • US11157808
    • 2005-06-22
    • Koichi FujisawaKazuhiko Isogawa
    • Koichi FujisawaKazuhiko Isogawa
    • B29C45/14
    • B29C43/146A63B37/0003A63B37/0074A63B45/00B29C33/0022B29C43/027B29K2021/00B29L2031/54
    • Mold 12 has an upper mold half 14 and a lower mold half 16. Pellet 34 obtained by cutting a resin composition into a predetermined size is placed into the mold 12. One pellet 34 is put on one recessed part 24. The pellet 34 has an incipient fluidization temperature T of 50° C. or greater and 150° C. or less. Weight of the pellet 34 is 1.4 g or greater and 2.0 g or less. Through clamping, the pellet 34 is compressed, and heated to allow the resin composition to flow thereby forming a preforming material. Difference (Tp−T) between the molding temperature Tp and the incipient fluidization temperature T is equal to or less than 70° C. Percent Pp of change in the weight average molecular weight Mp of the preforming material to the weight average molecular weight M of the pellet 34 is equal to or greater than −30%. Cover is formed with this preforming material. Percent Pc of change in the weight average molecular weight Mc of the cover to the weight average molecular weight M of the pellet 34 is equal to or greater than −30%.
    • 模具12具有上半模14和下半模16。通过将树脂组合物切割成预定尺寸而获得的颗粒34被放入模具12中。一个颗粒34放置在一个凹部24上。颗粒34具有 初期流化温度T为50℃以上且150℃以下。 丸粒34的重量为1.4g以上且2.0g以下。 通过夹紧,将颗粒34压缩并加热,使树脂组合物流动从而形成预成型材料。 成型温度Tp和初始流化温度T之间的差(Tp-T)等于或小于70℃。预成型材料的重均分子量Mp的变化百分数Pp与重均分子量M 丸粒34等于或大于-30%。 盖用这种预成型材料形成。 覆盖层的重均分子量Mc与粒料34的重均分子量M的变化百分比Pc为-30%以上。