With the application of environmentally friendly gasoline and four stroke equipment in automobiles, the structure and raw materials of gasoline and diesel hoses have changed greatly. The development trend of internal adhesive is to replace nitrile rubber with fluorine rubber, chlorohydrin plastic or acrylic resin plastic. In order to reduce the share of gasoline and diesel fuel and further improve the temperature resistance, most of the inner viscoses are of composite structure, that is, they are composed of fluorine glue, chlorohydrin plastic or acrylic resin plastic, and are molded according to the extrusion. Because the price of fluorine glue is expensive, the fluorine glue layer is thin. The raising layer is woven or coiled by glass fiber, polyester fiber fabric or nylon fiber. The outer glue shall be chlorohydrin plastic, acrylic resin plastic or chlorosulfonated polyethylene plastic instead of neoprene.
In addition, acrylic resin is also used in the internal adhesive. The gasoline diesel rubber hose is covered with polyester 6 plastic film on the inner layer of nitrile rubber, which can make Abrasion resistant sand blasting hose The share of gasoline and diesel shall be less than 0.004ml/cm2 · 24h.
In recent years, China has also developed gasoline and diesel rubber hoses with similar structures. The inner glue is composed of fluorine glue and chlorohydrin plastic, and the outer glue is chlorohydrin plastic. The difference is that the improved layer uses aromatic fluorobenzene chemical fiber.
Central air conditioner wear-resistant Sandblasting hose
The wear-resistant sandblasting hose for central air conditioner is a rubber hose product for automobiles with rapid development trend. At present, there are all plastic, plastic epoxy resin composite materials, and all epoxy resin wear-resistant sandblasting hose for central air conditioner. Because of the application of the new refrigerant R134a for air conditioners, the structural characteristics and raw materials of the wear-resistant sandblasting hose for central air conditioners have changed. At present, plastic epoxy composite structure is mostly used, that is, the inner glue is composed of a layer of epoxy resin and a layer of plastic.
The abrasion resistant sand blasting hose for central air conditioning has the advantages of low penetration and heat resistance, and can be used at - 40-140 ℃, or even at 160 ℃. Two layers of plastic and one layer of epoxy resin plastic film are used for the adhesive in the wear-resistant sand blasting hose of the central air conditioner for automobiles. The epoxy resin plastic film is coiled between the two layers of plastic, which has the effect of anti permeability; The plastic layer is made of isopropyl titanate butyl ester, and the resin layer is polyester 6; The thickness of the double layers in the inner glue is 0.8mm, and the polyester resin layer is 0.04mm. The lifting layer is made of polyester fiber fabric, the outer glue is 2mm thick, and is covered by extrusion.