Patent ID: 6943209
Filing Date: 2005-09-13
Classification: C08K

Abstract:
1. A method for evaluating a mold for molding a vibration-insulating rubber molded product having flash, said method comprising: adding a silica powder and a carbon black to a rubber component, the content of said carbon black being determined such that (a) a portion having a thickness of 1 mm or less in said flash of the resultant vibration-insulating rubber molded product is substantially transparent or translucent with white or gray color, and that (b) a portion having a thickness of 2 mm or more in said flash is substantially opaque with black color; visually observing said flash to know whether or not said flash is substantially transparent or translucent with white or gray color or substantially opaque with black color; and determining that said mold does not have any damage when said flash is substantially transparent or translucent with white or gray color.