Rubber thread for golf ball
AssigneeSumitomo Rubber Industries, Ltd.
InventorKiyoto Maruoka
Life of this patent
Estimating the term…
Abstract
A manufacturing method for obtaining a rubber thread by (a) feeding a rubber composition (8) between a heat roller (3) and a belt (7) pressed against the heat roller (3) and pressurizing and crosslinking the rubber composition (8) by means of the heat roller (3) and the belt (7), thereby obtaining a crosslinked sheet material, and (b) cutting the crosslinked sheet material to obtain the rubber thread. A pressure to be applied to the rubber composition (8) at the crosslinking step is 0.03 Mpa to 1 Mpa. The rubber composition (8) fed at the crosslinking step is previously formed into a sheet by extrusion. Since a dry blend method is employed for the manufacturing method, a great workability can be obtained. The rubber thread obtained by the manufacturing method is easily stretched and is broken with difficulty during the stretch.
Claims6
A method of manufacturing a rubber thread for a golf ball comprising the steps of:
- (a) feeding the rubber composition between a heat roller and a belt pressed against the heat roller,
- (b) simultaneously pressurizing and crosslinking the rubber composition by means of the heat roller and the belt, thereby obtaining a crosslinked sheet material;
- and
- (c) cutting the crosslinked sheet material to obtain the rubber thread.
A rubber thread for a golf ball obtained from a crosslinked sheet material which is prepared by simultaneously pressurizing and crosslinking a rubber composition fed between a heat roller and a belt pressed against the heat roller, wherein a ten-point mean roughness Rz of the rubber thread is 40 μm or less.
Dependencies are inferred from the claim text.