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Cold-resistant and crack-resistant low-smoke, halogen-free and fire-retardant polyolefin sheath material with thermoplasticity and preparation method thereof

A polyolefin sheathed, low-smoke flame-retardant technology, used in plastic/resin/wax insulators, organic insulators, electrical components, etc., can solve the problem of low oxygen index, poor low temperature resistance and crack resistance, and low processing efficiency. problem, to achieve the effect of improving high tensile strength, improving flame retardant performance and structural flexibility

Active Publication Date: 2014-08-06
BAOSHENG SCI & TECH INNOVATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the shortcomings of traditional thermoplastic LLDPE / EVA cable materials, such as poor low temperature resistance and crack resistance, low oxygen index, and low processing efficiency, and provide a thermoplastic cold-resistant, crack-resistant, halogen-free, low-smoke, flame-retardant polymer with good processing performance. Olefin sheath material and preparation method thereof

Method used

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  • Cold-resistant and crack-resistant low-smoke, halogen-free and fire-retardant polyolefin sheath material with thermoplasticity and preparation method thereof
  • Cold-resistant and crack-resistant low-smoke, halogen-free and fire-retardant polyolefin sheath material with thermoplasticity and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] A thermoplastic cold-resistant, crack-resistant, halogen-free, low-smoke, flame-retardant polyolefin sheathing material is characterized in that it is prepared from the following components by weight:

[0029] 20~60 parts of linear low density polyethylene, 20~40 parts of ethylene-vinyl acetate copolymer, 10~20 parts of SEEPS, 10~20 parts of ethylene-acrylate copolymer, 50~100 parts of magnesium hydroxide, 20 parts of aluminum hydroxide ~50 parts, clinoptilolite 10~20 parts, magnesium borate whiskers 10~20 parts, antioxidant 1~5 parts, lubricant 2~6 parts, silane coupling agent 2~3 parts;

[0030] The antioxidants are tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester (antioxidant 1010), tri[2.4-di-tert-butylphenyl] One or more of phosphite (antioxidant 168), dilauryl thiodipropionate (antioxidant DLTP).

[0031] The lubricant is one or more of polyethylene wax, zinc stearate and polytetrafluoroethylene.

[0032] The vinyl acetate of th...

Embodiment 2

[0049] Three groups of formulas in Table 1 are prepared according to parts by weight. Then respectively according to the following steps: first quantitative magnesium borate whiskers, clinoptilolite and silane coupling agent are added to the high-speed mixer and mixed for 6min, and the stirring is stopped to obtain modified magnesium borate whiskers and clinoptilolite.

[0050] Mix the remaining components such as LLDPE in a high mixer at 80°C for 7 minutes to obtain a mixture. Then the mixture is extruded and granulated in a two-stage granulator, the temperature range of the upper stage barrel is 150~170°C, and the screw speed is about 130 rpm. The temperature range of the lower barrel is 130-150°C, and the screw speed is about 70 revolutions per minute to obtain a thermoplastic cold-resistant, crack-resistant, halogen-free, low-smoke, flame-retardant polyolefin sheath material. The main performance tests of each formulation of embodiment 2 are shown in Table 2.

[0051] Ta...

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Abstract

The invention discloses a cold-resistant and crack-resistant low-smoke, halogen-free and fire-retardant polyolefin sheath material with thermoplasticity and a preparation method thereof, and belongs to the technical field of cables. The cold-resistant and crack-resistant low-smoke, halogen-free and fire-retardant polyolefin sheath material is prepared from the following components in parts by weight: 20-60 parts of linear low density polyethylene (LLDPE), 20-40 parts of ethylene vinyl-acetate copolymer (EVA), 10-20 parts of styrenic block copolymer (SEEPS), 10-20 parts of alpha-ethylmescaline (AEM), 50-100 parts of magnesium hydrate, 20-50 parts of aluminum hydroxide, 10-20 parts of clinoptilolite, 10-20 parts of borate whisker, 1-5 parts of antioxidant and 2-6 parts of lubricating agent. The method comprises the following steps: firstly, adding the borate whisker, the clinoptilolite and 1% of silane coupling agent to a high-speed mixer and mixing; adding the residual components to the high-speed mixer, and then extruding and pelletizing the mixture in a two-stage pelletizer. The cold-resistant and crack-resistant low-smoke, halogen-free and fire-retardant polyolefin sheath material meets the requirements of an embrittlement experiment at low temperature of minus 40 DEG C and a crack-resistant experiment at high temperature of 150 DEG C, and furthermore has excellent flame retardant property.

Description

technical field [0001] The invention relates to a sheath material and a preparation method thereof, in particular to a thermoplastic cold-resistant, crack-resistant, halogen-free, low-smoke, flame-retardant polyolefin sheath material and a preparation method thereof, belonging to the technical field of electric cables. Background technique [0002] In recent years, with the country's emphasis on environmental protection and safety, low-smoke halogen-free flame-retardant cables are required in some large buildings or public places, such as large shopping malls, entertainment venues, subways, stations, ships, and nuclear power plants. According to rough statistics, the output of halogen-free flame-retardant cable materials in the Yangtze River Delta region alone reached about 100,000 tons in 2012. [0003] The cables used in cold areas such as Northeast China and Inner Mongolia have special requirements. The cables are mostly used in areas with harsh climate conditions. Condi...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L53/00C08K13/06C08K9/06C08K7/08C08K3/38C08K3/22C08K3/34B29C47/92H01B3/44B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/92704C08L23/0815B29C2948/9258C08K2201/003C08L23/0853C08L23/0869C08L2201/02C08L2201/22C08L2203/202C08L2205/035H01B3/441H01B7/18C08L53/00C08K13/06C08K9/06C08K7/08C08K3/38C08K2003/2224C08K2003/2227C08K3/34
Inventor 房权生许超李茁实王永甘胤嗣黄崇祺白质明
Owner BAOSHENG SCI & TECH INNOVATION
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