A study on the physical properties and application in rubber compounds which is used the ash of holed briquette coal as fillers

연탄재를 충전제(充塡劑)로한 고무배합(配合)에 있어서의 특성변화(特性變化) 및 그 응용(應用)에 관한 연구(硏究)

The purpose of this study is to apply in various fields of products economically and practically using the characteristic of ash of holed briquette coal in maximum. According to the test results, the cure rate of ash of holed briquette coal is comparatively late. But it has shown nearly same level of physical properities compared with other fillers except hard clay and grey carbon.