Rubber seal - AU/EU

Description of characteristics

Polyurethane is the abbreviation of polyurethane. It is a kind of polymer elastomer which contains carbamate repeat unit in the main chain structure. Its young's modulus is between plastic and rubber, so it is neither plastic nor rubber. According to the processing technology, it can be divided into mixing type polyurethane (MPU), pouring polyurethane (CPU) and thermoplastic polyurethane (TPU). According to the type of polyols, it can be divided into polyester type (AU) and polyether type (EU). Its mechanical strength is three to four times that of PVC, its wear resistance is five to ten times that of NR, and its oil resistance is one to five times that of NBR. In addition, it also has many outstanding comprehensive physical and chemical properties, such as radiation resistance, ozone resistance, good dielectric properties, good elasticity, and elongation of more than 500% (up to 1000%). In addition, the oil resistance, heat resistance and adhesion with metal of Au are better, while the hydrolysis resistance, cold resistance and antibacterial properties of Au are better. Because the hydrolysis resistance of ether bond is much stronger than that of carboxylate bond (about 5-10 times), EU is not easy to hydrolyze, and is more resistant to oil and fuel than nitrile butadiene rubber and hydrogenated nitrile rubber with low ACN content. The appearance of lactone polyurethane elastomer improved the hydrolysis resistance of Au, and the oil resistance and high temperature resistance were further improved.

Service temperature

The service temperature of Au in polyurethane ranges from - 40 ℃ to 100 ℃, and that of EU ranges from - 40 ℃ to 100 ℃.

hardness

Between 60 and 95 degrees.

colour

Currently available in black, transparent, green and orange. The color can also be specified by the customer.

application

Polyurethane materials can be used to manufacture solid tires, shock absorption products, buffer products, hydraulic and pneumatic seals in automobile industry; roller wheels and conveyor belts in textile, steel, paper and grain industries; oil seals and seals in oil extraction industry; seals, cushion pads and conveyor belts in mechanical industry; artificial heart, artificial heart valve and artificial blood vessel in medical field.