Low-cost anti-cracking flame-retardant polyethylene cable material and preparation method thereof

A technology for polyethylene and cable materials, applied in the field of cable materials, can solve the problems of easy generation of frictional heat, reduced crack resistance of cable materials, high price, etc., and achieves the effects of good mechanical properties, extended application scope and high cost performance.

Inactive Publication Date: 2017-03-29
SHANGHAI KAIBO SPECIAL CABLE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used flame-retardant polyethylene in the market is generally flame-retardant with bromine antimony. This type of flame-retardant system has good flame-retardant performance, but it is expensive and not environmentally friendly. Moreover, this type of flame-retardant polyethylene emits a lot of smoke and fire when it burns. Toxic gas, causing greater harm to victims in the event of a fire
In order to have better flame retardancy, the ordinary halogen-free flame-retardant polyethylene cable materials on the market usually add a large amount of inorganic hydroxide to improve the flame retardancy of the material, but this will make the mechanical and processing properties of the product worse. Very poor, in addition, due to the existence of a large amount of inorganic hydroxide in the material, during the cable extrusion process, the cable material is likely to generate frictional heat in the extruder, which will increase the temperature of the material and bring difficulties to the temperature control of each area of ​​the extruder
At the same time, the filling of a large amount of inorganic hydroxide also makes the crack resistance of the cable material decrease sharply, accompanied by the risk of cable cracking
[0003] Due to the above-mentioned shortcomings of flame-retardant polyethylene currently on the market, the use of flame-retardant polyethylene is limited. Therefore, it is imperative to develop a low-cost, crack-resistant flame-retardant polyethylene cable material, which is worthwhile. In-depth research and discussion by practitioners in the field

Method used

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  • Low-cost anti-cracking flame-retardant polyethylene cable material and preparation method thereof
  • Low-cost anti-cracking flame-retardant polyethylene cable material and preparation method thereof
  • Low-cost anti-cracking flame-retardant polyethylene cable material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] In the cable material formula, the name of each component and the proportion of each component by weight are as follows:

[0060]

[0061] Raw materials are selected according to the ratio of each component, wherein, in the carbon black masterbatch, the carbon black is 30-40% by weight, and the carrier polyethylene is 60-70%. The weight ratio of magnesium hydroxide, silicone rubber and polyethylene in the magnesium hydroxide silica gel flame retardant masterbatch is 30-40:30-40:20-40. Fully mix the accurately weighed resin and additives in a high-speed mixer at a speed of 100-1500 rpm. The mixing temperature of the high-speed mixer is 25-75° C. and the mixing time is 5-20 minutes. Extrude and granulate in a feed extrusion granulation mixing type twin-screw extrusion granulator, the extrusion temperature of the twin-screw extruder is 135-180 ° C, the temperature setting of the twin-screw extruder It is: feeding section 135-140°C, mixing section 145-165°C, extrusion g...

Embodiment 2

[0063] In the cable material formula, the name of each component and the proportion of each component by weight are as follows:

[0064]

[0065] Processes such as mixing and extrusion granulation are the same as in Example 1. The composition and weight ratio of the raw material components are shown in Table 1.

Embodiment 3

[0067] In the cable material formula, the name of each component and the proportion of each component by weight are as follows:

[0068]

[0069] Raw materials are selected according to the ratio of each component, wherein, in the carbon black masterbatch, the carbon black is 30-40% by weight, and the carrier polyethylene is 60-70%. The weight ratio of calcium carbonate, silicone rubber and polyethylene in the calcium carbonate silica gel flame retardant masterbatch is 30-40:30-40:20-40. Fully mix the accurately weighed resin and additives in a high-speed mixer at a speed of 500-1000 rpm. The mixing temperature of the high-speed mixer is 50° C. and the mixing time is 15 minutes. Extrude and granulate in a feeding extrusion granulation mixing type twin-screw extrusion granulator, the extrusion temperature of the twin-screw extruder is 145-170 ° C, the temperature setting of the twin-screw extruder It is: 145-150°C in the feeding section, 155-165°C in the mixing section, 170...

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Abstract

The invention provides a low-cost anti-cracking flame-retardant polyethylene cable material, which comprises the following components by weight: 15-30 parts of polyethylene resin; 10-30 parts of a compatilizer; 2-10 parts of carbon black masterbatch; 20-50 parts of a flame retardant; 2-15 parts of a silica gel masterbatch flame retardant; 0.2-2.0 parts of an antioxidant; and 0.2-2.0 parts of a lubricant. The invention further provides a preparation method of the low-cost anti-cracking flame-retardant polyethylene cable material. The low-cost anti-cracking flame-retardant polyethylene cable material provided by the invention has the advantages of low cost, n halogen, lead or other heavy metals, and good mechanical properties, processability, cracking resistance and flame retardance, also the prepared cable has smooth surface, thus being suitable for medium and low voltage, ultrahigh pressure of various specifications.

Description

technical field [0001] The invention belongs to the technical field of cable materials, and in particular relates to a low-cost anti-cracking flame-retardant polyethylene cable material and a preparation method thereof. Background technique [0002] With the improvement of environmental protection and safety awareness in all countries in the world, flame-retardant and environmentally friendly cable materials have been widely used and have great development potential. Flame-retardant polyethylene is widely used in the field of flame-retardant cables because of its light weight, good mechanical properties, very good low temperature resistance, good environmental stress cracking resistance, good processability, and excellent electrical insulation properties. Has a very wide range of applications. At present, the most widely used flame-retardant polyethylene in the market is generally flame-retardant with bromine antimony. This type of flame-retardant system has good flame-reta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K3/04C08K3/26C08K3/02C08K3/22C08K5/098C08J3/22
CPCC08L23/06C08J3/226C08J2323/06C08J2423/06C08J2483/04C08L2201/02C08L2203/202C08L2205/02C08L2205/025C08L2205/035C08L23/0815C08K13/02C08K3/04C08K2003/2224C08K5/098C08K2003/265C08K2003/026
Inventor 洪森林沈长勇
Owner SHANGHAI KAIBO SPECIAL CABLE FACTORY
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