EPDM rubber is a kind of ethylene propylene rubber, which not only maintains the basic properties of binary ethylene propylene rubber, but also improves the vulcanization performance. It can be vulcanized by various vulcanization systems such as sulfur and peroxide, and is used in the rubber products industry. A wider range, rubber roller is one of them. EPDM rubber rolls are excellent in high and low temperature resistance, ozone resistance, weather resistance, solvent resistance and electrical insulation properties, and are widely used in plastics, printing, tanning, general machinery and other fields 1JLYY94.
When using EPDM rubber to produce rubber roller, reasonable production method can achieve multiple purposes of improving rubber processing technology, improving product comprehensive index and reducing production cost. Considering the dual factors of index and cost, rubber manufacturers generally choose the following There are several ways to produce.
1. EPDM rubber + a large amount of filler (filler, rubber oil)
The price of EPDM rubber is quite high, but its density is very low. It can fill a large amount of filler and rubber oil, which can reduce the amount of rubber and reduce the production cost. Under normal circumstances, when high-density EPDM rubber is filled with a large amount of filler or rubber filling oil, the physical and mechanical strength of the vulcanized rubber does not appear to be significantly reduced, so many EPDM rubber roller manufacturers Both choose to use a large amount of filler in the rubber roller to reduce costs.
The rubber roller produced by using EPDM rubber has a wide temperature range and can be used in the range of -65 ° C to 140 ° C. It can be used for a long time at a temperature of 120 ° C, and the maximum operating temperature range can reach 150 ° C. The temperature range is visible. However, in actual production, a large amount of rubber filler will reduce the heat resistance of the rubber compound, which requires special attention; in theory, the use of EPDM rubber for the production of rubber rollers for long-term use at high temperatures cannot select a large amount of rubber filler to reduce Cost of production.
2. EPDM + EPDM reclaimed rubber
The performance of EPDM reclaimed rubber is basically the same as that of EPDM rubber. The price is much lower than that of EPDM. It can replace some EPDM rubber in rubber roller production and reduce the cost of raw materials. Compared with EPDM rubber, EPDM reclaimed rubber has better plasticity and fluidity. EPDM rubber added with reclaimed rubber has smaller expansion and shrinkage, which can improve the process performance of EPDM rubber and save part of the electricity cost. Compared with the production cost of the EPDM rubber roller by filling the rubber filler, the reasonable use of the EPDM reclaimed rubber can reduce the cost and ensure the good mechanical strength, heat resistance, aging resistance and the like of the rubber compound.
3. EPDM reclaimed rubber + butyl rubber / reclaimed rubber
EPDM rubber has excellent high temperature performance, but theoretically there is a certain difference between heat resistance and butyl rubber. Therefore, an appropriate amount of butyl rubber or butyl reclaimed rubber can be blended in the formulation to improve the heat resistance of the rubber roller. The propylene rubber and butyl rubber have different performance after aging. The thermal oxygen aging of butyl rubber is degraded, and the hardness of the rubber is decreased after aging. After aging, the hardness of the propylene rubber will rise and become hard and brittle. In this case, the use of butyl rubber or butyl reclaimed rubber in the EPDM rubber roll can also delay the aging time of the rubber roller and further expand the use range of the EPDM rubber roller.
Reasonable selection of the production mode of EPDM rubber rolls can not only improve the process performance of the rubber compound, improve the comprehensive index of the rubber roller, but also reduce the production cost. Finally, Xiaobian wants to ask: Which kind of production method do you prefer? Is there any better way of production?