Characteristics of polyurethane glass fiber sleeve

Polyurethane glass fiber tube is made of alkali free glass fiber yarn, finely woven into embryo tube by high-speed knitting machine, then coated with polyurethane with special configuration, and vulcanized at high temperature. The temperature resistance can reach above 150 o C, and the electrical performance is also very excellent, with good mechanical wear resistance and elasticity. It is widely used for insulation, thermal and mechanical protection of Class F motors, electrical appliances and other devices.

The characteristics of the finished insulating sleeve are largely derived from the characteristics of the material itself. This section introduces the characteristics of polyurethane glass fiber tube material.

Advantages of polyurethane glass fiber tube and polyurethane composite

Polyurethane composites are made of thermosetting polyurethane. This composite material has excellent tensile properties, impact resistance and corrosion resistance. Its typical tensile strength is about 880 kg/cm2, tensile modulus is about 30230 kg/cm2, and elongation at break is more than 7.5%. The foamed polyurethane composite can also reduce weight by 20%.

Polyurethane also has the limitation of reaction speed. In the production of large glass fiber reinforced polyurethane products, there is often no enough time to shut down the press because the polyurethane reaction is too fast. However, the flexibility of polyurethane chemical formulation and new equipment design have overcome the previous limitations.

Polyurethane composites have another advantage: they do not contain styrene and do not produce a large amount of volatile organic compounds. On the other hand, polyurethane contains MDI (diphenylmethane-4, 4 '- diisocyanate, a controlled material), but insiders believe that the MDI emitted during the molding process of polyurethane composites can generally be ignored, because according to the results of industrial emission tests, the vapor pressure of MDI is very low.

In terms of cost, according to an American research report, from 2001 to 2007, the international price of polyurethane became more competitive compared with polyester, vinyl ester and epoxy resin. The price gap between polyurethane and polyester resin in 2007 was significantly reduced compared with that in 2001, so the potential of polyurethane resin to gain more market share in the composite industry was greatly increased.

To sum up, polyurethane glass fiber pipe material has the following characteristics: high mechanical strength and oxidation stability; It has high flexibility and resilience; It has excellent oil resistance, solvent resistance, water resistance and fire resistance.