Plastic light conveyor belt - PU conveyor belt
PU conveyor belt
Thermoplastic polyurethane elastomer (TPU) refers to the incorporation of macromolecule diol (polyester or polyether), diisocyanate (MDI, HDI, PPDI) and small molecular chain extender (diol or diamine) Segment copolymer. TPU macromolecular backbone in the long chain polyol (polyether or polyester) constitute a soft segment, the main control of its low temperature performance, solvent resistance and weather resistance, and chain extenders and polyisocyanates constitute a hard segment to determine the hardness of the elastomer, Heat resistance and mechanical properties. The use of different varieties and structure of raw materials polyols, diisocyanates and chain extenders can be synthesized variety, different performance, versatile TPU, combined with hard and soft parts of the ratio can be adjusted in a wide range, but also with the help of In a variety of additives and different blending modification path to give it a wider performance.
The cohesive strength and structural diversity of the TPU hard segment determines the following properties:
(1) excellent wear resistance
TPU's Taber wear value of 0.5 ~ 0.35mg, is the smallest plastic, if added MoS2, silicone oil, graphite, etc. can reduce the friction coefficient, improve wear resistance.
(2) tensile strength, elongation TPU tensile strength of natural rubber and synthetic rubber 2-3 times, polyester TPU tensile strength of nearly 60MPa, elongation of nearly 500%; poly Ether TPU tensile strength of nearly 50MPa, elongation of nearly 400%. Especially in the high hardness is still high elongation.
(3) oil resistance
TPU oil resistance and nitrile rubber quite, with excellent oil resistance.
(4) low temperature resistance, weather resistance, ozone resistance prominent
Polyether TPU excellent low temperature resistance, up to -70 ℃ and not brittle; TPU weather resistance is better than natural rubber and synthetic rubber, its resistance to ozone and radiation characteristics in the aerospace industry has a special purpose.
(5) a wide range of hardness
TPU hardness range for Shore A10 ~ Shore D80, and the general rubber hardness range is generally in Shore A10 ~ Shore A100. TPU in Shaw A85 above is still very good flexibility, which is not available in other elastomers. So TPU has high load-bearing and good vibration-absorbing effect.
PU conveyor belt production process mainly scraping rolling compound rolling process and extrusion rolling compound two kinds of different processing methods of choice of coating materials will be different, so the final conveyor products in the use of performance and secondary processing It is different. I use the Secretary for two different production processes, with high-quality raw materials, to produce a variety of industries with a series of PU conveyor belt.