Sealing strip coating rubber and preparation method thereof, and car door sealing strip and preparation method thereof

Abstract

The invention provides a sealing strip coating rubber and a preparation method thereof, and a car door sealing strip and a preparation method thereof. The sealing strip coating rubber is prepared from the following components parts by weight: 50-70 parts of ethylene propylene diene monomer rubber K8340A, 60-100 parts of ethylene propylene diene monomer rubber K4551A, 5-7 parts of zinc oxide, 1 part of polyethyleneglycol PEG-4000, 2 parts of stearic acid, 1 part of dispersing agent WB16, 1.4-1.6 parts of ultraviolet absorbent, 9-11 parts of high-polymer polyethylene wax, 4-6 parts of black factice, 0.7-0.9 part of foaming agent AC, 90-130 parts of carbon black SP5000, 40-6 parts of light calcium carbonate, 30-50 parts of paraffin oil P-2286T, 8-12 parts of moisture absorber CaO, 5-7 parts of accelerator and 1.0-1.4 parts of sulfur. The sealing strip coating rubber can be coated on the outer side of the sealing part in the existing car door sealing strip, and can overcome the defects in the existing gelatin-sponge-structure sealing part.

Description

technical field [0001] The invention relates to the technical field of automobile door frame sealing strips, in particular to a sealing strip coated rubber. The invention also relates to a method for preparing the sealing strip coated rubber, and a vehicle door sealing strip using the sealing strip coated rubber and a preparation method of the vehicle door sealing strip. Background technique [0002] The main function of the car door frame seal is to play the role of sealing, dustproof, waterproof, shock absorption and decoration. It is installed on the protruding sheet metal of the door frame of the car body, and passes between the door frame seal and The bonding function of the car seal acts as a seal to prevent external wind, rain and dust from invading the car, and can reduce the vibration generated by the doors, windows and other parts of the car while driving. Existing automobile door frame sealing strips generally include an installation part clamped on the body door...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the sealing lip parts in the automobile door frame sealing strip are sprayed or embossed to play the role of wear resistance and beautification, but as people's requirements are getting higher and higher, simple spraying or embossing can no longer Meet the needs of customers

As for the sponge rubber used as the sealing part, due to the consideration of the softness, weather resistance, tensile performance and rigidity of the sponge rubber, the specific gravity is 0.4-0.6, and the 25% tensile stress is 140Kpa-190Kpa. EPDM sponge rubber, but the sponge rubber with the above specific gravity is prone to surface bumps, surface holes and other problems that affect the appearance of the product during the foaming process, and because the sponge rubber has poor wear resistance, it will also cause surface damage after long-term use Problems with wear, dross and contamination of door sheet metal

[0004] In order to solve the deficiencies in the use of existing sponge rubber, the conventional method is to spray a layer of silicone or polyurethane material on the surface of the sponge rubber to achieve decoration and wear resistance. However, due to the high cost of spraying materials, It will cause too much pressure on the overall cost of the sealing strip. In addition, due to the complicated spraying process, it will also make the overall production process of the sealing strip complicated, and the equipment investment is too high, which will increase the cost

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