| 摘要 |
PROBLEM TO BE SOLVED: To provide a joint sheet that can reduce an unvulcanized component to be an eluate from the joint sheet and can suppress the elution quantity of a vulcanization promotor to fleon and ester based lubricating oil. SOLUTION: NBR is used as a rubber component of a joint sheet, and its applied quantity is 15-35wt.% of the whole component weight of the joint sheet. Sulfur or an organic sulfur compound is used as a vulcanizing agent, and thiazoles and dithiocarbamates are used as a vulcanization promotor. The added quantity of the sulfur or organic sulfur compound is 1.0-5.0 pts.wt. of NBR in terms of sulfur, and the added quantity of the vulcanization promotor is 1.0-6.0 pts.wt. in all with thiazoles and dithiocarbamates put together. |
