| 摘要 |
PURPOSE:To provide the subject board material composed of a rubber composition produced by compounding a rubber such as natural rubber with a high- styrene resin at a specific ratio, having light weight, high hardness and excellent tensile strength and durability and exhibiting high antislip effect. CONSTITUTION:The objective board material is composed of a rubber composition produced by compounding 60-40 pts.wt. of at least one kind of rubber selected from natural rubber, styrene-butadiene rubber and butadiene rubber with 40-60 pts.wt. of a high-styrene resin. Preferably, 5-50 pts.wt. of short fiber having a length of 1-30mm is uniformly dispersed in the material. Moreover, it is preferable to uniformly disperse cork powder having particle size of 20-60 mesh and a bulk specific gravity of 0.05-0.06. Furthermore, the material preferably contains uniformly dispersed glass beads having particle diameter of 10-200mum and a bulk specific gravity of 0.15-0.3. |
