When industrial products are produced, the lowest temperature and the shortest vulcanization time are often pursued. When the vulcanization time is considered too long is often casually increase the accelerator, or improve the vulcanization temperature, but the actual practice is not right.

1, because the vulcanization temperature is determined by the variety of rubber, such as natural rubber, the best vulcanization temperature of 145-148 degrees, butylbenzene, butyl rubber, butyl rubber, butyl rubber, the best vulcanization temperature of 148-153 degrees, silicone rubber vulcanization temperature of 170-175 degrees.

2、The setting of vulcanization time is set with the thickness of the product and the operation requirements. Because the thermal conductivity of rubber is very poor. The thicker the product, the longer the vulcanization time.

3, in order to improve the vulcanization speed generally has two methods first is to increase the temperature, and then one is to increase the amount of accelerator or change the use of super super accelerator, such as temperature on the physical requirements of the product is not high can be filtered. But it is difficult to control.

Practice has proved. General ordinary product accelerator dosage should be the less the better. Add or subtract accelerator should not be proportional. Should increase or decrease the second. The third accelerator, improve the activation performance.

Blindly increasing accelerator and temperature to improve production has the following hazards.
1. The physical properties are affected.
2, there is the possibility of spraying frost
3、The rubber is easy to self-sulfur.
4、The adhesive material is sticky, poor vulcanization performance and not easy to operate.

The best formula should be selected to best suit the upper limit of rubber vulcanization temperature, the least amount of accelerator, and the shortest vulcanization time. These three main sides to consider.

At present, there are many rubber factories in China that produce molded products below 8MM thickness, using DM-M--TMTD-D accelerator with four kinds of and is a very good formula, the advantage of which is that the vulcanization The advantage of DM is that it has a flat curing curve, long coking time, easy to control, and not easy to spray frost.

DM is the first accelerator that determines the whole vulcanization process, and the dosage is the most among the four accelerators, and it determines some physical properties of the rubber.

The dosage of M is less and it can improve the vulcanization speed and be used as the second accelerator. In the vulcanization process, it and DM are both inhibited and activated by each other, and this use plays a key role in the control of vulcanization speed. It is also a plasticizer, which is beneficial to the plasticization of rubber molecules.

TMTD is the third accelerator, it is a super super accelerator for speeding up the vulcanization speed, the general dosage does not exceed 10% of DM, otherwise the rubber is easy to use more self-sulfur, rubber material properties decline. Accelerator D itself is a kind of medium speed accelerator. Generally, it does not exceed 20% of DM. It is good to be adjusted together with TMTD when regulating the sulfur speed.

The solubility of different accelerators in rubber is different, and the amount of single accelerator can be reduced after using this kind of accelerator. It plays a key role in controlling the accelerator frosting in rubber products. It also greatly facilitates the regulation of vulcanization speed.