High-compression-resistance MPP solid-wall pipe and preparation method thereof

Abstract

The invention discloses a high-compression-resistance MPP solid-wall pipe and a preparation method thereof. The high-compression-resistance MPP solid-wall pipe is prepared from the following raw materials in parts by weight: 100 parts of modified polypropylene, 0.5-15 part of tackifier, 0.1-15 part of nano material, 0.1-15 part of liquid crystal material, 0.5-15 part of impact modifier, 0.1-15 part of nucleating agent, 0-30 parts of filling masterbatch, 0.5-5 part of color masterbatch, 0.5-30 part of engineering plastic. The high-compression-resistance MPP solid-wall pipe manufactured by usingthe raw materials is good in rigidity, high in bending strength, high in bending elasticity modulus, high in ring stiffness, good in impact strength and corrosion resistance, and good in long-term load resistance and compression resistance at high temperature due to good rigidity, high strength, so that the wall thickness can be reduced, the cost can be reduced, the energy can be saved, and the production efficiency can be improved. The solid-wall pipe can satisfy the requirements of high-standard quality electric power engineering.

Description

technical field [0001] The invention relates to the technical field of MPP solid-wall pipes, in particular to a high-pressure-resistant MPP solid-wall pipe and a preparation method thereof. Background technique [0002] At present, the excavation and non-excavation sheathing pipes used on high-voltage cables are mainly modified polypropylene (abbreviated as MPP in the industry) pipes. The modified polypropylene pipe produced by the prior art has a bending strength of 36-38MPa, a bending modulus of elasticity of 1000-1500MPa, a body tensile strength of 24-26MPa, and a welding tensile strength of 22.5-24MPa. In engineering, the pipe is easily broken at the welding joint; the thermal compression force of the ring piece (section) is low at a high temperature of 70°C, and in actual use, the compressive performance is poor under long-term high temperature and pressure conditions, so the design of the pipe thickness is relatively large , high cost; the anti-discoloration and anti-...

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Problems solved by technology

The modified polypropylene pipe produced by the prior art has a bending strength of 36-38MPa, a bending modulus of elasticity of 1000-1500MPa, a body tensile strength of 24-26MPa, and a welding tensile strength of 22.5-24MPa. In engineering, the pipe is easily broken at the welding joint; the thermal compression force of the ring piece (section) is low at a high temperature of 70°C, and in actual use, the compressive performance is poor under long-term high temperature and pressure conditions, so the design of the pipe thickness is relatively large , high cost; the anti-discoloration and anti-aging performance of the pipe is poor, which affects the service life, and it is difficult to meet the requirements of high-standard quality power engineering

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