Square single-wall corrugated pipe material for electric power

Abstract

The invention relates to an industrial pipe material, in particular to a square single-wall corrugated pipe material for electric power, which comprises the following components in weight part: 50-80 parts of homo-polypropylene powder material, 10-25 parts of polypropylene block copolymer powder material, 3-12 parts of hollow glass bead, 3-8 parts of compatilizer, 3-8 parts of flexibilizer, 0.1-1.5 parts of lubricating agent, 0.1-1.2 parts of antioxygen, 5-15 parts of fire retardant and 0.05-0.5 part of ultraviolet light absorber. The square single-wall corrugated pipe material for the electric power, disclosed by the invention, has the characteristics of high tensile strength, high bending modulus, high Vicat temperature, higher heat conductivity coefficient, high impact strength, good fire resistance, excellent production stability and the like.

Description

technical field [0001] The invention relates to an industrial plastic pipe material, in particular to a square single-wall corrugated pipe material for electric power. Background technique [0002] At present, corrugated pipes for electric power are generally HDPE pipes and MPP single-wall corrugated pipes, which are respectively made of HDPE (high-density polyethylene) and reinforced modified polypropylene materials. These two materials can only be used for round pipes, not for square pipes. The requirements for the use of modified polypropylene pipes for electric power have the following disadvantages: [0003] HDPE pipes are made of ordinary HDPE pipe materials, which have the following disadvantages: 1. Low Vicat temperature, poor heat resistance, less than 80°C; 2. Low tensile strength, less than 18MPa; 3. Low flexural modulus, less than 800MPa; 4. Poor flame retardancy and flammability; 5. Poor processability, high viscosity of HDPE material, resulting in slow product...

AI Technical Summary

Problems solved by technology

[0002] At present, corrugated pipes for electric power are generally HDPE pipes and MPP single-wall corrugated pipes, which are respectively made of HDPE (high-density polyethylene) and reinforced modified polypropylene materials. These two materials can only be used for round pipes, not for square pipes. The requirements for the use of modified polypropylene pipes for electric power have the following disadvantages:

[0003] HDPE pipes are made of ordinary HDPE pipe materials, which have the following disadvantages: 1. Low Vicat temperature, poor heat resistance, less than 80°C; 2. Low tensile strength, less than 18MPa; 3. Low flexural modulus, less than 800MPa; 4. Poor flame retardancy and flammability; 5. Poor processability, high viscosity of HDPE material, resulting in slow production speed and poor gloss of pipe appearance

[0004] The MPP single-wall corrugated pipe is made of reinforced modified polypropylene raw materials. The main mechanism is to increase the strength of the pipe by adding a large amount of inorganic reinforcing materials (the circular pipe is limited by the structure, and the compressive capacity in the vertical direction is higher than that of the pipe). It is much lower than the square pipe, so it is necessary to make up for the structural defects through materials), but in this way, the toughness index and other indexes of the material are greatly damaged, so there are the following disadvantages: 1. The low temperature performance is poor, because it is necessary to make up for the structure. Defects in compressive strength, a large amount of inorganic reinforcing materials are added to the material, which seriously damages the toughness of the material, and the impact performance is greatly reduced; 2. The tensile strength is low, generally about 22MPa; 3. The surface smoothness of the product Relatively poor; 4. Poor flame retardancy, because in order to increase the modulus of the material, a large amount of inorganic powder material is added to the formula, and the inorganic powder material has a combustion-supporting effect on the product, so it cannot be flame-retardant; 5 , The thermal conductivity is low, which is 0.28-0.32, resulting in slow cooling and forming speed, low production speed and high processing cost

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