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Low-shrinkage halogen-free flame-retardant polyethylene composition and preparation method and application thereof

A flame-retardant polyethylene and low-shrinkage technology, which is applied in the direction of plastic/resin/wax insulators, organic insulators, electrical components, etc., can solve the problems of low shrinkage mechanical strength and the inability to improve the shrinkage rate and mechanical properties of polyethylene materials at the same time. Achieve low molding shrinkage and good mechanical properties

Inactive Publication Date: 2021-05-07
KINGFA SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the shrinkage rate and mechanical properties of polyethylene materials cannot be improved simultaneously in the prior art, and to provide a low-shrinkage halogen-free flame-retardant polyethylene composition having both low shrinkage and high mechanical strength

Method used

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  • Low-shrinkage halogen-free flame-retardant polyethylene composition and preparation method and application thereof
  • Low-shrinkage halogen-free flame-retardant polyethylene composition and preparation method and application thereof
  • Low-shrinkage halogen-free flame-retardant polyethylene composition and preparation method and application thereof

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Embodiment 1～10

[0055] According to the formula in Table 1, add LLDPE, EVA, POE, halogen-free flame retardant, compatibilizer, dispersant, antioxidant, and carbon black masterbatch into the high-speed mixer, and mix at a speed of 2000-3000rpm Obtain the mixture evenly; put the mixture into a twin-screw extruder for melt blending, extruding, and granulation to obtain the low-shrinkage halogen-free flame-retardant polyethylene composition, wherein the twin-screw extruder The temperature is 180-200°C, and the length-to-diameter ratio of the screw is 48:1.

[0056] Table 1 each embodiment each component content (weight part)

[0057]

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Abstract

The invention provides a low-shrinkage halogen-free flame-retardant polyethylene composition and a preparation method and application thereof. The low-shrinkage halogen-free flame-retardant polyethylene composition comprises the following components in parts by weight: 15-20 parts of LLDPE; 15-20 parts of EVA; 5-10 parts of POE; 60-70 parts of a halogen-free flame retardant; 3-10 parts of a compatilizer; 3-5 parts of a dispersant; 1-2 parts of an antioxidant; 1-3 parts of carbon black master batch; the melt index of the LLDPE is 0.5-5 g / 10 min under the conditions of 190 DEG C and 2.16 kg; the melt index of the EVA is 0.5-5 g / 10 min under the conditions of 190 DEG C and 2.16 kg; and the content of VA in the EVA is 18-28 wt%. Through the synergistic effect of the LLDPE, the EVA and the POE, the composite material has a relatively low molding shrinkage rate and also has relatively good mechanical properties.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a low-shrinkage halogen-free flame-retardant polyethylene composition and its preparation method and application. Background technique [0002] With the vigorous development of the domestic and international communication industry, the optical cable industry has also developed rapidly, and the amount of sheath material used for the surface sheath layer has increased sharply, and the requirements for materials have become higher and higher and more standardized, such as Physical properties such as tensile strength, elongation, carbon black content, and environmental stress cracking are all performance indicators strictly required by domestic and foreign standards. For ordinary armored optical cables, polyethylene materials that meet the requirements of the standard GB / T 15065 can meet the requirements, but for some special optical cables, such as aramid reinforced optical cables, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08L83/04C08K3/22C08K5/134C08K5/526C08K13/02H01B3/44
CPCC08L23/0853H01B3/441C08K2003/2224C08L2201/02C08L2201/22C08L2205/035C08L2205/025C08L2203/202C08L23/0815C08L51/06C08L83/04C08K3/22C08K5/1345C08K5/526C08K13/02
Inventor 王道娟黄险波叶南飚陈平绪李计彪付晓刘乐文
Owner KINGFA SCI & TECH CO LTD