The physics and mechanical properties of the oily conveyer belt covedng layer rubber are as mentioned in the following table:
Typebreak the intensity /mpabreak extension rate /%wearing and tearing /mm3
Lo14.0350200
Do16.0350160
Notes:
Lo--oily conveyer belt under the general condition;
Do--conveyer belt under the shock resistant and oily condition.

Oil proof performance of the oil proof conveyer belt covering layer is as mentioned in the following table:

Serial numberexperimental condition in soaking the liquidmrate of change of the volume /%
Oil number in gb/t1690soaking temperature /soaking time /hlodo
1oil no.270±270ï0/ 1+20-5
2oil no.370±270ï0/ 1+50+5
3oil no.3100±222±0.25+50+5
Notes:one of oil proof testing is ok.