The automotive door and window sealing strip processed from EPDM rubber as the main raw material is mainly used for sealing the door leaf door frame, side windows, front and rear windshields, engine covers and trunk lids, etc., with good heat resistance, weather resistance and ozone resistance. EPDM reclaimed rubber retains the basic performance characteristics of EPDM rubber, and the price is much lower than that of EPDM rubber, which can replace the appropriate proportion of EPDM rubber to produce automotive door and window seals, effectively reducing the cost of raw materials.
1. The advantages of using EPDM reclaimed rubber for automobile door and window seals
It is made of EPDM unvulcanized rubber and waste EPDM rubber products as raw materials for desulfurization, which has good high and low temperature resistance, aging resistance, weather resistance, ozone resistance and other characteristics; The product price is low, the compatibility with EPDM is good, the fluidity and plasticity of the reclaimed rubber are better, the expansion and contraction are small, and the processing heat generation is less. The rejection rate of automobile door and window seals in the production process is very high, mostly because of the unqualified size or appearance, EPDM reclaimed rubber as a raw material to replace EPDM original rubber has the advantages of high controllability and stable quality, which can effectively save production costs and reduce the waste rate.
2. The skills of choosing EPDM reclaimed rubber for automobile door and window seals
In order to ensure the good sealing performance of the vehicle, the rubber used is required to have good weather resistance, ozone resistance and good mechanical strength, the cross-sectional shape and size of the sealing strip are required to be coordinated with the body, and the appearance color is uniform, the surface is smooth and bright, and the processing performance is good. Therefore, when choosing EPDM reclaimed rubber E4LYY410 for automotive sealing strips, it is recommended to choose Hongyun EPDM reclaimed rubber with high glue content, good elasticity, high fineness, no impurities and no taste, which has good processing performance during use, stable size of the finished product, shiny surface, and is not easy to change color and migrate.
3. Key points of the formula design of EPDM reclaimed rubber mixed with automobile seals
EPDM rubber is commonly used in sulfur vulcanization system for the production of automotive door and window seals mixed with EPDM reclaimed rubber. When using sulfur vulcanization, EPDM/reclaimed rubber is recommended to use strong or super strong accelerators, such as thiuram accelerators, dithiocarbamate accelerators and thiazole accelerators, which can be used together to prevent frosting. High wear-resistant furnace black, medium super wear-resistant furnace black has good reinforcing effect, and silicate products are recommended for fillers.
When EPDM reclaimed rubber is used for automobile door and window seals, it is necessary to select the appropriate EPDM reclaimed rubber according to the performance requirements and cost budget of the sealing strip, control the amount of reclaimed rubber, and optimize the formula design, especially the vulcanization system, reinforcing agent and filler, so as to improve the performance of the sealing strip and reduce costs. When EPDM reclaimed rubber reduces the production cost of automotive door and window seals, it also needs to be strictly produced in the production process, and the follow-up editor will continue to discuss related issues with you.
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