Automobile anti-collision rubber block is an elastic buffer device installed in a specific part of the automobile body, which is generally processed from natural rubber or EPDM rubber as the main raw material, which plays the role of absorbing collision energy, reducing body damage and reducing collision noise. EPDM reclaimed rubber retains the basic performance characteristics of EPDM rubber, and can be used in combination with EPDM rubber to produce automobile anti-collision rubber blocks in an appropriate proportion, which can effectively reduce production costs on the premise of ensuring the elasticity, wear resistance and aging resistance of automobile anti-collision rubber blocks.
1. EPDM rubber/EPDM reclaimed rubber vulcanization formula
80 parts of EPDM rubber, 20 parts of high-grade EPDM reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 230 parts of carbon black N770, 100 parts of paraffin oil, 5 parts of low molecular weight polyethylene, 0.5 parts of accelerator M, 2 parts of accelerator TMTM, 1.5 parts of sulfur; Total 445 copies.
75 parts of EPDM rubber, 25 parts of high-grade EPDM reclaimed rubber, 4 parts of zinc oxide, 1 part of stearic acid, 58 parts of carbon black N550, 58 parts of carbon black N770, 16 parts of clay, 48 parts of light calcium carbonate, 56 parts of naphthenic oil, 1.55 parts of accelerator NOBS, 0.4 parts of accelerator PZ, 0.4 parts of accelerator TMTD, 0.65 parts of sulfur; Total 344 copies.
2. How much EPDM reclaimed rubber is mixed in the automobile anti-collision rubber block
When using EPDM reclaimed rubber to reduce the production cost of automobile anti-collision rubber blocks, it is recommended to choose EPDM reclaimed rubber that is close to the molecular weight distribution of EPDM original rubber, such as Hongyun excellent EPDM reclaimed rubber, which has high glue content, good elasticity, high and low temperature resistance, aging resistance, ozone resistance, high strength, erosion resistance, high insulation E4LYY1111 and other performance characteristics, and can be used with EPDM rubber to produce automotive anti-collision rubber blocks, and the dosage is controlled at about 20-30 parts, which can reduce the cost of raw materials. It can also optimize the processing process performance of anti-collision rubber block and the comprehensive index of finished products.
3. EPDM rubber/EPDM reclaimed rubber production automotive anti-collision rubber formula design points
When EPDM rubber and EPDM reclaimed rubber are used together to produce automobile anti-collision rubber blocks, sulfur vulcanization system and peroxide vulcanization system can be used, and the two can be used together if necessary. Carbon black N220/N330 can be used in the reinforcing filling system, and the mechanical strength of vulcanized rubber is higher. Combined with carbon black N550, N770, etc., it can further improve the processing performance, elasticity and flexural resistance of EPDM rubber/reclaimed rubber. Calcium carbonate and talcum powder are used to fill. Automotive anti-collision rubber blocks containing EPDM reclaimed rubber mostly use paraffin oil and naphthenic oil as softeners, and the dosage increases appropriately with the increase of the amount of reclaimed rubber.
Automobile anti-collision rubber block is an important device to improve the safety and comfort of automobiles. When EPDM reclaimed rubber and EPDM rubber are used together to produce automobile anti-collision rubber blocks, it is also necessary to select the appropriate antioxidant and appropriately adjust the production process parameters.
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