Title:
How to make a golf ball
Document Type and Number:
Japanese Patent JP6331520
Kind Code:
B2
Abstract:
The invention provides a method of manufacturing golf balls by drying blending: one or more type of (i) resin pellets of a first kind obtained by kneading, in a nitrogen atmosphere, a low-humidity atmosphere having a moisture content of not more than 100 ppm or a vacuum atmosphere, a resin blend composed primarily of (A) a thermoplastic polyurethane and (B) a polyisocyanate compound, at least some of the isocyanate groups within the resin pellets remaining in an unreacted state; and one or more type of (ii) resin pellets of a second kind composed primarily of (C) a thermoplastic polyurethane, then feeding the dry blend to an injection-molding operation and forming at least one cover layer.
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Inventors:
Hiroyuki Nagasawa
Mochizuki Yunobu
Mochizuki Yunobu
Application Number:
JP2014050922A
Publication Date:
May 30, 2018
Filing Date:
March 14, 2014
Export Citation:
Assignee:
Bridgestone Sports Co., Ltd.
International Classes:
A63B45/00; A63B37/00; C08K5/29; C08L75/04
Domestic Patent References:
| JP2008049152A | ||||
| JP56167430A | ||||
| JP2009226122A | ||||
| JP2011078761A |
Foreign References:
| US20060189787 |
Attorney, Agent or Firm:
Takashi Kojima
Saori Shigematsu
Katsunari Kobayashi
Takeshi Ishikawa
Katsuhiko Masaki
Saori Shigematsu
Katsunari Kobayashi
Takeshi Ishikawa
Katsuhiko Masaki