Raw material of floor heating is a kind of mechanical performance is very stable medium density polyethylene, of ethylene and octylene monomer by metallocene catalytic copolymerization. Its main chain of ethylene and octylene short branched chain structure, make it at the same time with ethylene is superior, stress cracking resistance, resistance to low temperature impact toughness, excellent long-term water pressure resistance and heat resistant creep properties of octene
1, softness, PE - RT is relatively soft. No special tools required for construction, so the processing cost is relatively low.
2, thermal conductivity, used for floor heating pipes need to have good thermal conductivity. PE - RT heat conduction performance is good, its coefficient of thermal conductivity for PP, PP - R - twice the B tubes. Very suitable for floor heating.
3, low temperature heat impact: PE - RT low-temperature impact resistance is better. Hard to hit the pipe burst when winter construction, increase the flexibility of the construction schedule.
4 and environmental protection: PE - RT and PP - R can be recycled, do not pollute the environment. The PEX can't be recycled will produce secondary pollution;
5, processing performance stability: PEX is to control the degree of crosslinking and crosslinking evenness, machining complex and directly affect the tube performance. And - RT, PE and PP - R processing is simple, pipe performance is largely determined by the raw material, performance is stable.
PE - RT pipes can connect with hot melt connection method, by accidental damage pipe hot melt connection can also be used to repair. Raw material of floor heating with creep damage curve in accordance with product standards, is the only without crosslinking polyethylene in the present stage can be used for a variety of the hot water pipe. Production requirements, in accordance with requirements of the national and international product standards, production of hot and cold water in plastic pipe and plastic pipe materials, must be in accordance with the GB/T18252-2000 "plastic pipe system using extrapolation method for the determination of thermoplastic pipe hydrostatic strength for a long time," stated in the test and through the pipeline of qualified special material. That is to say, each raw material manufacturers must according to floor heating pipe product standards to meet the forecast intensity reference curve of creep damage, to prove the sales of raw materials is qualified. Only do 110 ℃, 8760 hours of hydrostatic state thermal stability is a points test proves pipe raw material is qualified. If I do not know the product is qualified raw materials, also is the equivalent of cement.
