ETPU (expanded thermoplastic polyurethane) double-flat-wall hollow twisted pipe

Abstract

The invention discloses an ETPU (expanded thermoplastic polyurethane) double-flat-wall hollow twisted pipe, comprising, by weight, 60-80 parts of thermoplastic polyurethane (TPU), 4-8 parts of ethylene propylene diene monomer rubber, 4-10 parts of a foaming agent, 1-2 parts of a crosslinking agent, 10-18 parts of amorphous alpha-olefin copolymer, 10-20 parts of an organosilicon oligomer, 20-35 parts of modified polypropylene, 10-20 parts of organic whiskers, and 1-2 parts of a bridging agent. The ETPU double-flat-wall hollow twisted pipe has the advantages that the ETPU is used as a pipe bodymaterial for the double-flat-wall hollow twisted pipe, the composition and formulation of the ETPU materials are optimized, and the organic whiskers, ethylene propylene diene monomer rubber, amorphousalpha-olefin copolymer and other materials are added; under synergy of the materials, a produced pipe body gains ring stiffnesses of SN8 9.0-10.2, SN10 11-12.8, SN12.5 14.3-16.1 and SN16 18-19.6, impact performance (23 DEG C) TIR / % of 8-8.2, creep rate of 2.5-3, compressive permanent deformation (%) of 25-30, and resilience rate (%) of 73-78.

Description

technical field [0001] The invention relates to the technical field of double-flat-wall hollow winding pipes, in particular to an ETPU double-flat-wall hollow winding pipe. Background technique [0002] The unique structural design of the double flat-wall hollow winding pipe has more superior performance than other plastic pipes. The general double-wall corrugated pipe is made of high-density polyethylene, which has the advantages of light weight, high pressure resistance, and good toughness. However, there are still problems of poor elasticity and large permanent deformation. Moreover, if the pipe itself is buried in the ground, it needs to have a large ring stiffness and ring flexibility, because it does not bear internal pressure or bears a small internal pressure when buried, mainly It still bears the external pressure, if the ring stiffness is too low, the pipe body will be greatly deformed, so that the safe use of the pipe cannot be guaranteed. [0003] E-TPU polyuret...

AI Technical Summary

Problems solved by technology

[0002] The unique structural design of the double flat-wall hollow winding pipe has more superior performance than other plastic pipes. The general double-wall corrugated pipe is made of high-density polyethylene, which has the advantages of light weight, high pressure resistance, and good toughness. However, there are still problems of poor elasticity and large permanent deformation. Moreover, if the pipe itself is buried in the ground, it needs to have a large ring stiffness and ring flexibility, because it does not bear internal pressure or bears a small internal pressure when buried, mainly It still bears external pressure. If the ring stiffness is too low, the pipe body will undergo a large deformation, so that the safe use of the pipe cannot be guaranteed.

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