阅读说明：本技术 一种电缆保护管材料及其制备方法 (Cable protection pipe material and preparation method thereof ) 是由 王添 王峰 周轩 薛宇 张汶卓 马建波 庄严 王飞 马洪举 秦金刚 于 2020-12-30 设计创作，主要内容包括：本发明属于电缆保护管技术领域,具体涉及一种电缆保护管材料及其制备方法,所述的电缆保护管材料由如下重量份数的原料制成：酚醛树脂20-30份、氯化聚氯乙烯15-25份、乙烯-丙烯酸酯-马来酸酐共聚物10-20份、硅酸铝纤维1-10份、阻燃剂10-20份、增塑剂10-15份、高岭土3-8份和热稳定剂2-5份。本发明电缆保护管质量轻,强度高、韧性好,耐火性能优异。(The invention belongs to the technical field of cable protection pipes, and particularly relates to a cable protection pipe material and a preparation method thereof, wherein the cable protection pipe material is prepared from the following raw materials in parts by weight: 20-30 parts of phenolic resin, 15-25 parts of chlorinated polyvinyl chloride, 10-20 parts of ethylene-acrylate-maleic anhydride copolymer, 1-10 parts of aluminum silicate fiber, 10-20 parts of flame retardant, 10-15 parts of plasticizer, 3-8 parts of kaolin and 2-5 parts of heat stabilizer. The cable protection pipe has the advantages of light weight, high strength, good toughness and excellent fire resistance.)

1. The cable protection tube material is characterized by being prepared from the following raw materials in parts by weight:

20-30 parts of phenolic resin, 15-25 parts of chlorinated polyvinyl chloride, 10-20 parts of ethylene-acrylate-maleic anhydride copolymer, 1-10 parts of aluminum silicate fiber, 10-20 parts of flame retardant, 10-15 parts of plasticizer, 3-8 parts of kaolin and 2-5 parts of heat stabilizer.

2. The cable protection tube material of claim 1, wherein the degree of polymerization of chlorinated polyvinyl chloride is 650-750.

3. The cable protection tube material of claim 1, wherein the flame retardant is at least one of bisphenol a-bis (diphenyl phosphate), resorcinol polyphenyl phosphate, and hydroquinone bis (diphenyl phosphate).

4. The cable protection tube material of claim 1, wherein the plasticizer is at least one of dioctyl phthalate, dimethyl phthalate, trioctyl trimellitate, and dimethyl cyclohexanedicarboxylate.

5. The cable protection tube material of claim 1, wherein the heat stabilizer is at least one of a calcium-zinc stabilizer, a barium-calcium stabilizer, and an organotin stabilizer.

6. A method for preparing a cable protection tube material, comprising the steps of:

(1) preparing various raw materials according to the weight parts;

(2) adding the raw materials into a mixing roll for mixing to obtain a mixture;

(3) adding the mixture into a double-screw extruder for mixing, and extruding and molding through a die;

(4) and (5) cooling and cutting after shaping to obtain the product.

7. The method of preparing a cable protection tube material according to claim 6, comprising the steps of: the mixing temperature in the step (2) is 150 ℃ and 170 ℃, and the time is 20-30 min.

Technical Field

The invention belongs to the technical field of cable protection pipes, and particularly relates to a cable protection pipe material and a preparation method thereof.

Background

In the process of laying cables, the cables are generally protected by cable protection pipes made of polyvinyl chloride materials, the existing power protection pipes made of polyvinyl chloride materials are poor in pressure bearing capacity, low in strength and poor in toughness, are easy to crack and damage when being pressed in the using process, are poor in fire-resistant and corrosion-resistant performance, and cannot be well protected.

The Chinese invention patent application with publication number CN110423424A discloses a highly heat-resistant and anti-aging CPVC power cable protection tube, which comprises the following raw materials in parts by weight: 450-550 parts of CPVC, 300 parts of PVC 200-200 parts of calcium powder 150-200 parts of toughening agent, 3-15 parts of nitrile rubber, 20-30 parts of stabilizer, 10-20 parts of flame retardant, 1-5 parts of stearic acid and 12-18 parts of paraffin. The highly heat-resistant and anti-aging CPVC power cable protection pipe disclosed by the invention can resist the thermal deformation temperature of more than 98 ℃, has excellent high-temperature resistance, and can adapt to a high-temperature severe environment; the flame retardant property reaches FV-0 level; meanwhile, the cable has the characteristics of good flexibility, difficult fracture and aging, long service life, no radiation pollution, light weight and the like. In addition, the preparation method is simple and controllable, and the production is easy to operate. However, the cable protection pipe disclosed by the patent has the advantages of general strength and toughness, and poor pressure bearing capacity in the laying and use of cables.

The Chinese invention patent application with publication number CN111363271A discloses a corrosion-resistant MPP power cable protection tube material and a preparation method thereof, the power cable protection tube material comprises 30-40 parts of polyvinyl chloride resin, 10-20 parts of propylene-ethylene random copolymer, 8-20 parts of fluorosilicone rubber, 10-20 parts of oxidized polyethylene wax, 5-15 parts of nano silica powder, 3-9 parts of nano calcium carbonate, 4-10 parts of white carbon black, 7-14 parts of tri (2, 4-di-tert-butylphenyl) phosphorous acid, 8-20 parts of silicon nitride, 8-18 parts of silicon carbide compound, 2-6 parts of mica powder, 4-10 parts of carbon fiber, 6-16 parts of expandable graphite, 2-4 parts of CPE flame retardant and 5-10 parts of lithium china stone powder by weight, the preparation method is simple, the prepared power cable protection pipe is high in strength, not easy to deform, excellent in flame retardance, high temperature resistance and wear resistance, suitable for being used in severe environments and long in service life. However, the patent has more inorganic materials, poor compatibility among the raw materials and poor toughness.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks, it is an object of the present invention to provide a cable protective tubing material and a method for preparing the same.

In order to achieve the purpose, the invention adopts the following technical scheme:

the cable protection tube material is prepared from the following raw materials in parts by weight:

20-30 parts of phenolic resin, 15-25 parts of chlorinated polyvinyl chloride, 10-20 parts of ethylene-acrylate-maleic anhydride copolymer, 1-10 parts of aluminum silicate fiber, 10-20 parts of flame retardant, 10-15 parts of plasticizer, 3-8 parts of kaolin and 2-5 parts of heat stabilizer.

Preferably, the degree of polymerization of the chlorinated polyvinyl chloride is 650-750.

Preferably, the flame retardant is at least one of bisphenol a-bis (diphenyl phosphate), resorcinol polyphenyl phosphate and hydroquinone bis (diphenyl phosphate).

Preferably, the plasticizer is at least one of dioctyl phthalate, dimethyl phthalate, trioctyl trimellitate and dimethyl cyclohexanedicarboxylate.

Preferably, the heat stabilizer is at least one of a calcium-zinc stabilizer, a barium-calcium stabilizer and an organotin stabilizer.

The preparation method of the cable protection tube material comprises the following steps:

(1) preparing various raw materials according to the parts by weight;

(2) adding the raw materials into a mixing roll for mixing to obtain a mixture;

(3) adding the mixture into a double-screw extruder for mixing, and extruding and molding through a die;

(4) and (5) cooling and cutting after shaping to obtain the product.

Preferably, the mixing temperature in the step (2) is 150 ℃ and 170 ℃, and the time is 20-30 min.

The invention has the following positive beneficial effects:

1. the phenolic resin has the advantages of high temperature resistance, corrosion resistance, light weight and good compatibility with kaolin; the chlorinated polyvinyl chloride has excellent mechanical strength, corrosion resistance, heat resistance, solubility and flame retardance, and is used together with phenolic resin, so that the mechanical strength and the corrosion resistance of the material are improved; the ethylene-acrylate-maleic anhydride copolymer can be used for toughening and modifying phenolic resin and chlorinated polyvinyl chloride well, and the impact toughness of the material is improved; the aluminum silicate fiber is a novel, light and energy-saving refractory material, the flame retardant further improves the refractory performance of the outer protective layer, the plasticizer increases the plasticity of resin molecules to enhance the flexibility of the resin molecules, the heat stabilizer improves the service life of the material, and the various raw materials have synergistic effect, so that the obtained cable protection tube is light in weight, high in strength, good in toughness and excellent in refractory performance.

2. The flame retardant is a non-halogenated flame retardant, can prevent organic matters from decomposing when being matched with kaolin, achieves the purposes of fire insulation, flame retardance and heat insulation, and has high fire resistance temperature and good flame retardance effect. The plasticizer is at least one of dioctyl phthalate, dimethyl phthalate, trioctyl trimellitate and dimethyl cyclohexanedicarboxylate, has small molecular weight and good compatibility with chlorinated polyvinyl chloride and phenolic resin, and is favorable for improving the toughness of the material and reducing the quality of the material.

Detailed Description

The invention will be further illustrated with reference to some specific examples.

Example 1

The cable protection tube material is prepared from the following raw materials in parts by weight:

20 parts of phenolic resin, 16 parts of chlorinated polyvinyl chloride with the polymerization degree of 650-750, 10 parts of ethylene-acrylate-maleic anhydride copolymer, 1 part of aluminum silicate fiber, 10 parts of flame retardant, 10 parts of plasticizer, 3 parts of kaolin and 4 parts of heat stabilizer.

The flame retardant is bisphenol A-bis (diphenyl phosphate).

The plasticizer is dioctyl phthalate.

The heat stabilizer is a calcium-zinc stabilizer.

The preparation method of the cable protection tube material comprises the following steps:

(1) preparing various raw materials according to the parts by weight;

(2) adding the raw materials into a mixing roll for mixing to obtain a mixture;

(3) adding the mixture into a double-screw extruder for mixing, and extruding and molding through a die; the mixing temperature is 150-;

(4) and (5) cooling and cutting after shaping to obtain the product.

And (3) performance test results: the density of the cable protective tube obtained in this example was 1.12g/cm³The weight is light; the tensile strength is 33.8MPa, the elongation at break is 413 percent, the tearing strength is 38.5MPa, the strength is high, and the toughness is good; coefficient of linear expansion 20X 10^-6K^-1The oxygen index is up to 25%, and the fire resistance is excellent.

Example 2

The cable protection tube material is prepared from the following raw materials in parts by weight:

22 parts of phenolic resin, 15 parts of chlorinated polyvinyl chloride with the polymerization degree of 650-750, 12 parts of ethylene-acrylate-maleic anhydride copolymer, 3 parts of aluminum silicate fiber, 12 parts of flame retardant, 11 parts of plasticizer, 4 parts of kaolin and 3 parts of heat stabilizer.

The flame retardant is resorcinol bis (diphenyl phosphate).

The plasticizer is dimethyl phthalate.

The heat stabilizer is an organic tin stabilizer.

See example 1 for a method of preparing the above-described cable protective tube material.

And (3) performance test results: the density of the cable protective tube obtained in this example is 1.15g/cm³The weight is light; the tensile strength is 34.2MPa, the elongation at break is 437 percent, the tear strength is 40.2MPa, the strength is high, and the toughness is good; coefficient of linear expansion 20X 10^-6K^-1The oxygen index is as high as 26%, and the fire resistance is excellent.

Example 3

The cable protection tube material is prepared from the following raw materials in parts by weight:

24 parts of phenolic resin, 20 parts of chlorinated polyvinyl chloride with the polymerization degree of 650-750, 15 parts of ethylene-acrylate-maleic anhydride copolymer, 5 parts of aluminum silicate fiber, 15 parts of flame retardant, 12 parts of plasticizer, 4 parts of kaolin and 3 parts of heat stabilizer.

The flame retardant is polyphenyl resorcinol phosphate.

The plasticizer is dimethyl phthalate.

The heat stabilizer is a barium-zinc stabilizer.

See example 1 for a method of preparing the above-described cable protective tube material.

And (3) performance test results: the density of the cable protective tube obtained in this example was 1.12g/cm³The weight is light; the tensile strength is 35.1MPa, the elongation at break is 435 percent, the tearing strength is 41.3MPa, the strength is high, and the toughness is good; coefficient of linear expansion 20X 10^-6K^-1The oxygen index is as high as 29%, and the fire resistance is excellent.

Example 4

The cable protection tube material is prepared from the following raw materials in parts by weight:

25 parts of phenolic resin, 21 parts of chlorinated polyvinyl chloride with the polymerization degree of 650-750, 17 parts of ethylene-acrylate-maleic anhydride copolymer, 6 parts of aluminum silicate fiber, 16 parts of flame retardant, 13 parts of plasticizer, 5 parts of kaolin and 2 parts of heat stabilizer.

The flame retardant is polyphenyl resorcinol phosphate.

The plasticizer is dimethyl cyclohexanedicarboxylate.

The heat stabilizer is a barium-calcium stabilizer.

See example 1 for a method of preparing the above-described cable protective tube material.

And (3) performance test results: the density of the cable protective tube obtained in this example is 1.14g/cm³The weight is light; the tensile strength is 32.7MPa, the elongation at break is 415%, the tear strength is 39.2MPa, the strength is high, and the toughness is good; coefficient of linear expansion 25X 10^-6K^-1The oxygen index is as high as 24%, and the fire resistance is excellent.

Example 5

The cable protection tube material is prepared from the following raw materials in parts by weight:

28 parts of phenolic resin, 24 parts of chlorinated polyvinyl chloride with the polymerization degree of 650-750, 20 parts of ethylene-acrylate-maleic anhydride copolymer, 9 parts of aluminum silicate fiber, 18 parts of flame retardant, 14 parts of plasticizer, 7 parts of kaolin and 4 parts of heat stabilizer.

The flame retardant is hydroquinone bis (diphenyl phosphate).

The plasticizer is trioctyl trimellitate.

The heat stabilizer is an organic tin stabilizer.

See example 1 for a method of preparing the above-described cable protective tube material.

And (3) performance test results: the density of the cable protective tube obtained in this example is 1.13g/cm³The weight is light; the tensile strength is 30.6MPa, the elongation at break is 422 percent, the tearing strength is 39.7MPa, the strength is high, and the toughness is good; linear expansion coefficient 21 x 10^-6K^-1The oxygen index is up to 25%, and the fire resistance is excellent.

Example 6

The cable protection tube material is prepared from the following raw materials in parts by weight:

30 parts of phenolic resin, 25 parts of chlorinated polyvinyl chloride with the polymerization degree of 650-750, 20 parts of ethylene-acrylate-maleic anhydride copolymer, 10 parts of aluminum silicate fiber, 20 parts of flame retardant, 15 parts of plasticizer, 8 parts of kaolin and 5 parts of heat stabilizer.

The flame retardant is hydroquinone bis (diphenyl phosphate).

The plasticizer is dioctyl phthalate.

The heat stabilizer is a calcium-zinc stabilizer.

See example 1 for a method of preparing the above-described cable protective tube material.

And (3) performance test results: the density of the cable protective tube obtained in this example is 1.17g/cm³The weight is light; the tensile strength is 31.5MPa, the elongation at break is 420 percent, the tearing strength is 38.4MPa, the strength is high, and the toughness is good; coefficient of linear expansion 20X 10^-6K^-1The oxygen index is up to 25%, and the fire resistance is excellent.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.