1: Automotive Silicone Rubber Products
1.1 Automotive Hose
In 2008, there were about 20 manufacturers of silicone tubes for automobiles in China, but overall, the scale of production enterprises was generally small, distribution was scattered, and technology
The technical power is weak, production processes and equipment are relatively backward, and new product development is slow. From the point of view of production capacity, the supply of ordinary automotive hoses exceeds demand.
The hoses needed for high-grade cars are far from meeting the needs of the market. At present, in the joint venture models introduced, the localization rate of rubber hoses is less than 40%.
The domestic matching rate for cars is only 5%. Therefore, the automotive hose industry should follow the international trend in the future, only to speed up the development of high-performance automotive silicon
Plastic products can meet the development needs of the automotive industry.
1.1.1 Brake hose
Due to the emergence of non-reliable cars, the increase in working temperature of brake fluids and the use of high-boiling brake fluids, the current brake hose inner rubber layer
There is a trend of using EPDM rubber instead of styrene-butadiene rubber. The outer and inner rubber layers of brake hoses are mostly EPDM rubber, and the reinforcing layer is made of polyester.
Polyethanol or rayon fibers. The inner adhesive layer can be made of pressure-resistant polyamide, and the outer adhesive layer can be chlorosulfonated polyethylene.
1.1.2 Fuel hose
Due to the use of unleaded gasoline and the development of high-oxidation values, the corrosiveness of the fuel to the rubber increases, so the inner layer of the fuel hose
Must have good fuel resistance. The inner adhesive layer has been developed to use fluoroelastomer, epichlorohydrin rubber or acrylic rubber instead of nitrile rubber.
Reduce the permeability of fuel and further improve the heat resistance of rubber.
1.1.3 Power Steering Hose
The development of automobiles puts forward requirements for high heat resistance and high durability for rubber hoses. The inner rubber layer should have good oil resistance, and the outer rubber layer should have resistance.
Grinding, heat resistance, weather resistance and other characteristics. At present, the inner and outer layers of hoses have been made of nitrile rubber and chloroprene rubber, hydrogenated nitrile rubber, and chlorosulfonated polyethylene rubber.
Rubber, chlorinated polyethylene rubber, acrylic rubber conversion, reinforced nylon 66-based.
1.1.4 Radiator Hose
With the development of automobiles in the direction of energy saving and low pollution, the temperature of the engine has been increased by 15 to 50°C in recent years. Therefore, the sulfur vulcanization system was adopted later.
The heat pipe hose produced was gradually replaced by a product made of a peroxide system. The main material used was EPDM rubber.
1.1.5 Turbocharger Hose
The main requirement of the hose is that it has good heat resistance. At present, the turbo rubber hose in foreign countries adopts an all-rubber structure, that is, the inner rubber layer is made of fluorine rubber.
It is composed of silicone rubber with good heat resistance. The reinforcing layer is knitted with high-strength aramid fiber and the outer rubber layer is made of silicone rubber.
1.1.6 Air Conditioning Hose
At present, with the application of the new environmentally friendly refrigerant R134a, the structure and material of air-conditioning hoses vary greatly. The resin layer and butyl chloride rubber are used for the inner rubber layer.
The structure of rubber and EPDM rubber is the best combination, and its use effect is good.
1.2 Automotive oil seal
The oil seal is a high-tech precision rubber part. After more than ten years of development, the annual demand for oil seals in China has exceeded 100 billion.
At the same time, there are more than 100 million automotive oil seals for automotive OEMs. There are more than 300 production companies with different sizes and sizes.
There are more than 10 companies with an annual production capacity of over 30 million pieces, more than 3,000 kinds of products, and 30% of companies have different numbers of products
mouth. The development of the automobile industry has provided a vast market and good opportunities for the development of oil seals. Through the introduction of technology and the adjustment of product structure, I
The country's oil seal industry has accelerated the application of new technologies and the development of new products. Product performance, quality and variety have been greatly improved, especially in technology.
Higher content of automotive engine, transmission, valve oil seal, and fluorine rubber, acrylic rubber, hydrogenated nitrile rubber, polytetrafluoroethylene oil
Sealed and composite special oil seals have made significant progress in manufacturing technology.
It is particularly critical that in the future, domestic oil seal production enterprises should focus on the fluid dynamics of oil seals and develop their own high intellectual property rights.
The development trend of energy products and future oil seals is composite oil seals, aluminum frame bonded fluoro rubber, oil seals made by injection vulcanization process, and oils
The sealing lip part is attached with PTFE sheet, and glass fiber, graphite, molybdenum disulfide and other PTFE oils are added to PTFE.
Seals can achieve better results.
1.3 Sealing strips for automobiles
At present, China has more than 60 enterprises that produce automobile rubber seals, and has imported more than 40 foreign advanced rubber seal extrusion lines.
The annual production capacity is about 170 million meters, and the actual output is about 100 million meters.
The rubber sealing strip material is basically EPDM rubber. With the rapid development of the automotive industry, new materials for automotive sealing strips are coming.
The more, especially the superiority of thermoplastic elastomer materials used as automotive seals, is recognized by people in the industry. Thermoplastic bullets used in car seals
The main body materials are polyolefin thermoplastic elastomers (TPV), which have good wear resistance and low friction coefficient. They can not only be used as sealing strips for automotive glass guide channels.
Extrusion materials, can also be used as car corner seal material. In addition, the water-foaming spongy TPV has been successfully developed in foreign countries and is closely
The seal has been widely used as a new trend to replace the sponge rubber to make automotive seals. In addition, the TPV coloring process is simple and convenient, usually
As an exterior trim material for automotive rubber seals, the current color TPV and color rubber in-line co-extruded rubber seal production technologies are already in use in China.
Several automotive seal production companies have introduced applications.