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Inorganic modified high heat-resistant low-shrinkage low-smoke halogen-free flame retardant polyolefin cable material and preparation method thereof

A polyolefin cable material and inorganic modification technology, which is applied in the field of cable materials, can solve the problems of insufficient heat shrinkage, limited application occasions, large heat shrinkage, etc., to improve high temperature resistance and shrinkage resistance, and improve heat resistance Aging performance, the effect of improving heat shrinkage performance

Inactive Publication Date: 2014-12-17
HUANGMEI KEPUDA INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for this type of cable material to pass the heat shrinkage test of less than 2% heat shrinkage required in cables or optical cables, and the heat resistance cannot meet the requirements, which limits the application of this type of traditional cable material
Affected by vinyl acetate monomer, the crystallinity of EVA is relatively low, and it has a good ability to accommodate powder, but the destruction of the crystal region by the inorganic flame retardant makes the temperature resistance of the material a little worse, although the traditional The heat resistance of LLDPE will be better, and the addition of LLDPE will improve the heat resistance performance, but because LLDPE shrinks greatly after being heated, the final product will shrink greatly at a certain temperature, which cannot meet the requirement of less than 2% heat shrinkage. Generally above 5%
Although the addition of inorganic flame retardant aluminum hydroxide will have a good effect on improving heat shrinkage, the effect is limited, and excessive addition of aluminum hydroxide will affect the physical and mechanical properties of the material
Therefore, it is difficult to find this balance point in the formulation system of traditional low-smoke halogen-free flame-retardant polyolefin cable materials, and it cannot meet the heat resistance and shrinkage tests of materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This example is an inorganic modified high heat resistance low shrinkage low smoke halogen free flame retardant polyolefin cable material:

[0018] (1) The raw material formula is as follows:

[0019]

[0020] (2) Preparation process:

[0021] The matrix resin, aluminum hydroxide, inorganic montmorillonite, polymer silicone, and antioxidant 1010 made by mixing 70% EVA and 30% metallocene PE were mixed at high speed according to the mass fraction in the table After the machine is fully mixed, it is internally kneaded by an internal mixer at a processing temperature range of 110°C-130°C, fed by a cone-double feeder, extruded by a co-rotating twin-screw extruder, formed by a single screw, and then ground Pelletizing by a hot cutting machine, transported and cooled by a cyclone separator, and screened by a vibrating sieve, and finally made into an inorganic modified high heat-resistant, low shrinkage, low-smoke, halogen-free, flame-retardant polyolefin cable material. ...

Embodiment 2

[0025] This example is an inorganic modified high heat resistance low shrinkage low smoke halogen free flame retardant polyolefin cable material:

[0026] (1) The raw material formula is as follows:

[0027]

[0028] (2) Preparation process:

[0029] The matrix resin, aluminum hydroxide, inorganic montmorillonite, magnesium stearate, and antioxidant 1010 made by mixing 70% EVA and 30% metallocene PE were mixed at high speed according to the mass fraction in the table After the machine is fully mixed, it is internally kneaded by an internal mixer at a processing temperature range of 110°C-130°C, fed by a cone-double feeder, extruded by a co-rotating twin-screw extruder, formed by a single screw, and then ground Pelletizing by a hot cutting machine, transported and cooled by a cyclone separator, and screened by a vibrating sieve, and finally made into an inorganic modified high heat-resistant, low shrinkage, low-smoke, halogen-free, flame-retardant polyolefin cable material....

Embodiment 3

[0033] This example is an inorganic modified high heat resistance low shrinkage low smoke halogen free flame retardant polyolefin cable material:

[0034] (1) The raw material formula is as follows:

[0035]

[0036] (2) Preparation process:

[0037] The matrix resin, aluminum hydroxide, inorganic montmorillonite, silicone powder, and antioxidant 1010 made by mixing 70% EVA and 30% metallocene PE were mixed in a high-speed mixer according to the mass fraction in the table. After fully mixing, in the processing temperature range of 110°C-130°C, it is internally kneaded by an internal mixer, fed by a cone-double feeder, extruded by a co-rotating twin-screw extruder, formed by a single screw, and then heated by grinding. Machine pelletizing, cyclone conveying and cooling, vibrating screen screening, and finally made into inorganic modified high heat resistance, low shrinkage, low smoke, halogen-free flame retardant polyolefin cable material.

[0038] The finished product p...

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Abstract

The invention relates to a cable material and in particular relates to an inorganic modified high heat-resistant low-shrinkage low-smoke halogen-free flame retardant polyolefin cable material and a preparation method thereof. The formula of the inorganic modified high heat-resistant low-shrinkage low-smoke halogen-free flame retardant polyolefin cable material comprises 100 parts of matrix resin, 120-160 parts of fire retardant, 10-30 parts of inorganic imvite, 1-4 parts of lubricant and 1-3 parts of antioxidant; the preparation method of the cable material comprises the steps of firstly, stirring the raw materials in a high-speed mixer evenly, secondly, banburying in a temperature interval from 110 to 130 DEG C by use of a Banbury mixer, and then feeding by use of a twin-screw feeder, extruding by use of double screws, molding by use of a single screw, hot cutting and pelleting by use of a grinding surface, conveying by use of a cyclone separator, sieving by use of a vibrating sieve and then packaging to obtain the finished inorganic modified high heat-resistant low-shrinkage low-smoke halogen-free flame retardant polyolefin cable material. Compared with a common low-smoke halogen-free flame retardant polyolefin cable material, the thermal aging resistance of the inorganic modified high heat-resistant low-shrinkage low-smoke halogen-free flame retardant polyolefin cable material is improved and the shrinkage performance of the cable material is greatly improved, and therefore, the problem of easy shrinkage of the low-smoke halogen-free polyolefin cable materials at high temperatures is solved.

Description

technical field [0001] The invention relates to a cable material, in particular to an inorganic modified high-heat-resistant, low-shrinkage, low-smoke, halogen-free, flame-retardant polyolefin cable material and a preparation method thereof. Background technique [0002] Most of the traditional low-smoke halogen-free flame-retardant polyolefin cable materials use LLDPE (linear low-density polyethylene) and EVA (ethylene-vinyl acetate copolymer) as the main resin base material, and graft PE (polyethylene graft) As a compatibilizer. Add a certain amount of aluminum hydroxide to make a low-smoke, halogen-free, flame-retardant polyolefin cable compound. However, it is difficult for this type of cable material to pass the thermal shrinkage test of less than 2% heat shrinkage required in electric cables or optical cables, and the heat resistance cannot meet the requirements, which limits the application of this type of traditional cable material. Affected by vinyl acetate monomer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08K13/06C08K3/34C08K3/22C08K5/134
CPCC08L23/0853C08K2201/003C08L2201/02C08L2201/08C08L2203/202C08L2205/02C08L2205/03C08L23/06C08L83/04C08K13/06C08K9/00C08K2003/2227C08K3/346C08K5/1345C08K5/098
Inventor 李得志柯斌
Owner HUANGMEI KEPUDA INDAL
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