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The life of silicone rubber strip

by:Kenna     2021-05-05
The life of the silicone rubber strip, the product features of the wooden door, door and window sealing strip: The self-adhesive wooden door sealing strip is made of EPDM rubber foam, which creates its excellent characteristics. The door and window sealing strip features plastic steel door and window sealing strips in recent years A new generation of doors and windows that are widely used. Compared with ordinary door and window sealing strips, it has better anti-corrosion, weather resistance, noise reduction and heat insulation effects. The rubber materials of the sealing strips are more resistant to aging, low temperature, moisture, and chemical corrosion. , Especially the ethylene propylene diene monomer rubber (EPDM) which is resistant to ozone aging. Automobile product rubber formula and its preparation method and process Background technology: At present, the low temperature performance of rubber products used in automobiles on the market is generally around -25°C, but the rubber parts on automobiles cannot withstand cold air in a harsh climate. The airflow caused the product life to be greatly reduced. The performance of rubber products used in automobiles directly affects personal safety. For example, the recall of some of the cars sold by Toyota in the past few years caused serious reputational consequences. Therefore, all automobile manufacturers need a long-term stable performance. Adequately safe rubber products. The life of the silicone rubber strip has no obvious change in the physical properties of silicone rubber at -50℃. Fifth, look at the specific gravity, how many meters per kilogram can be produced, add the PVC sealing strip with heavy calcium, you stretch it back and forth several times by hand, and the surface will appear A small amount of white powder, the density of the PVC sealing strip should be 1,4-1,6, and the silicon rubber sealing strip should be filled with nano-scale silica as a filling and reinforcing effect. It has a light texture and a density of 1,1-1,25. Therefore, the yield rate is 20% higher than that of PVC sealing strips. Introduction to automobile sealing strips The sealing performance is an important indicator of the quality of the entire vehicle, and the automobile sealing strip product is one of the important parts that determine the pros and cons of this indicator. It is commonly used in front and rear windshields, doors, and windows , Initiate the engine room, trunk and other body parts to fill the gaps between the body parts. It has the functions of shock absorption, waterproof, dustproof, sound insulation, decoration, etc., and plays a role in the maintenance of the crew and the entire vehicle. There are many ways to classify, usually according to the title of the device part (component), the type of data, the number of composite data, the work characteristics and other factors to stop the classification. The function of the sealing strip is to improve the airtightness and prevent wind and rain from entering the car. In order to avoid the occurrence of the above, the sealing strip must be maintained regularly. 5. Because of its excellent physical and mechanical properties, it is often used in manufacturing Airplanes, cars, trains, passenger cars, ships, high and low voltage switch cabinets, glass curtain walls, aluminum alloy heat-insulating window sealing parts and diving products, high-pressure steam hoses, tunnels, viaduct joints and other waterproof parts and other industrial and agricultural sealing parts. Technical realization factors: The technical problem to be solved by the present invention is to provide a rubber formula for automobile products and a preparation method thereof, which has good low-temperature performance, can withstand the attack of cold air in a local environment with relatively bad weather, and guarantees good performance. Ensure personal safety. Technical realization factors: The technical problem to be solved by the present invention is to provide a rubber formula for automobile products and a preparation method thereof, which has good low-temperature performance, can withstand the attack of cold air in a local environment with relatively bad weather, and guarantees good performance. Ensure personal safety. The life of silicone rubber strips is not conducive to environmental protection because PVC products contain halogens and heavy metals in stabilizers. Therefore, developed foreign countries and domestic Beijing and coastal cities have eliminated or restricted the use of PVC strips. Low temperature elasticity, when the tensile capacity reaches 100MPa The temperature is -58. EPDM is a copolymer of ethylene, propylene and a small amount of third monomer non-conjugated diene. The international name: EthyienePropyeneDieneMethyiene is referred to as EPDM. B. Sealing strip for continuous vulcanization in salt bath: Salt bath vulcanization adopts a salt bath system containing nitrite, which pollutes the environment and has been gradually eliminated. C. According to the section shape, it can be divided into solid core products (round, square , Flat cross-section shape), hollow products and metal rubber composite products, EPDM rubber sealing strips are much stronger than PVC strips in terms of sealing elasticity and durability, but due to the need for microwave vulcanization line shaping, processing performance High consumption, usually more than 20 times that of PVC processing, the product cannot be reused, it is not environmentally friendly, and it is not an advocated product. It is also called fire-resistant silicone sealing strip and fire-resistant self-extinguishing silicone sealing strip. It is famous for its good flame-retardant and self-extinguishing performance. The main process is to first use high-quality silicone raw materials to make a molded silicone strip through a large extruder. Then it must be made by high room temperature vulcanization and drying. Compared with ordinary silica gel strips, the difference between high temperature and flame retardant silica gel strips is that it needs to add flame retardant powder to the formula. The silica strips made by doing so are super strong. The flame-retardant and fire-proof performance of the product has played a certain safety guarantee in the sealing of electronic appliances, so many people also call it a fire-proof sealing strip. Technical features: 1. An automobile product rubber, characterized in that the automobile product rubber is composed of EPDM, carbon black, softening oil, processing aids, and accelerators.
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