The automobile wiper blades support the rubber scraper through the metal skeleton or elastic steel sheet, which is mainly used to remove rainwater on the surface of the windshield in rainy days. EPDM rubber has excellent heat resistance, ozone resistance and weather resistance, and is an ideal raw material for the production of automobile wiper blades. EPDM reclaimed rubber retains the basic performance characteristics of EPDM rubber, which can replace part of EPDM rubber to produce automobile wiper blades, and effectively reduce the cost of raw materials on the premise of ensuring the quality of finished products.
1. EPDM rubber/EPDM reclaimed rubber produces vulcanization formula for automobile wiper blades
80 parts of EPDM rubber, 20 parts of EPDM reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 55 parts of carbon black N550, 50 parts of carbon black N774, 78 parts of naphthenic oil, 2 parts of accelerator BZ, 1 part of accelerator M, 0.6 parts of accelerator TMTD, 0.4 parts of accelerator TRA, 1.5 parts of sulfur; Total 294.5 copies.
70 parts of EPDM rubber, 30 parts of EPDM reclaimed rubber, 5 parts of zinc oxide, 1 part of stearic acid, 225 parts of carbon black N660, 100 parts of paraffin oil, 8 parts of calcium oxide, 2 parts of accelerator BZ, 1 part of accelerator DM, 0.5 parts of accelerator TMTD, 1 part of accelerator ZDC, 2 parts of sulfur; Total 445.5 copies.
2. EPDM rubber/EPDM reclaimed rubber production automobile wiper blade formula design
(1) EPDM reclaimed rubber selection skills
When using EPDM reclaimed rubber to replace part of the EPDM original rubber for the production of automobile wiper blades, it is recommended to choose EPDM reclaimed rubber with high ethylene propylene content, such as Hongyun environmental protection EPDM reclaimed rubber, with a glue content of about 70%, high and low temperature resistance, ozone resistance, excellent weather resistance, high mechanical strength, good hand elasticity, environmental protection and no taste, which can replace more copies of EPDM rubber to produce automobile wiper blades, effectively reducing the cost of raw rubber on the premise of ensuring the performance of the finished product; The mixing ratio of EPDM reclaimed rubber is usually among 20% and 50%.
(2) EPDM rubber/reclaimed rubber combined with the production of automobile wiper blade compound selection skills
When EPDM rubber and EPDM reclaimed rubber are used in an appropriate proportion to produce automobile wiper blades, the sulfur-accelerator system is mostly used, and the accelerator BZ is used as the main accelerator to improve the aging resistance of EPDM vulcanized rubber E5LYY214, and the accelerator M, accelerator DM, accelerator TMTD, etc. are used as auxiliary accelerators to adjust the vulcanization speed and the degree of vulcanization crosslinking. EPDM rubber/reclaimed rubber combined with rubber is fast-pressed out of the furnace black, which can improve the extrusion stiffness of the rubber material and reduce deformation; Semi-reinforcing carbon black has the dual functions of reinforcing and filling, and the two can be used together to produce automotive wiper blades, which can improve the performance of the rubber compound and reduce costs.
When using EPDM rubber/EPDM reclaimed rubber and glue to produce automobile wiper blades, it is also necessary to use an appropriate amount of softeners and antioxidants to improve the processing performance of rubber and prolong the service life of products; We will continue to discuss the relevant issues with you in the future.
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