Halogen-free flame-retardant polyolefin sheath material and preparation method thereof

A polyolefin sheath, polyolefin elastomer technology, applied in plastic/resin/wax insulators, organic insulators, electrical components, etc. Effects of smoke generation rate, mass loss suppression, risk and toxicity suppression

Pending Publication Date: 2022-05-17
中广核拓普(湖北)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, major cable factories have mainly met the Class A flame retardant grade of bundled cables, and the issue of smoke generation and calorific value of cable materials after cabled combustion still needs to be studied

Method used

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  • Halogen-free flame-retardant polyolefin sheath material and preparation method thereof
  • Halogen-free flame-retardant polyolefin sheath material and preparation method thereof
  • Halogen-free flame-retardant polyolefin sheath material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix 40 parts of aluminum hydroxide, 160 parts of magnesium hydroxide and 5 parts of nucleating agent sepiolite at high speed, the high-speed mixing time is 5min-10min, the speed of the high-speed mixer is 250rpm-500rpm, and then add Mix 0.4 parts of silicone oil, 2 parts of silicone masterbatch, and 0.5 parts of high molecular weight silica gel at high speed for 10 minutes to obtain a compound flame retardant;

[0035]10 parts of OBCs, 15 parts of EMMA, 37 parts of EVA with VA content of 40wt%, 22 parts of MLLDPE, 14 parts of modified compatibilizer metallocene resin grafted maleic anhydride copolymer, 2 parts of silicone masterbatch, 0.5 parts of high Molecular silica gel, 0.4 part of silicone oil, 0.5 part of DLTP, 0.5 part of 1010, 0.02 part of 168 and 0.3 part of zinc stearate are internally mixed with a 75L internal mixer. The internal mixing temperature of the internal mixer is 150-160°C, and SDJ75-180 is used. Twin-screw / single-screw unit mixing, plasticizing, gr...

Embodiment 2-5

[0038] The preparation method of Example 2-5 is basically the same as that of Example 1, the only difference is that: The composition and content of the flame-retardant polyethylene sheath material in Example 2-5 is different from that of Example 1 flame-retardant polyethylene The components and contents of the sheathing material are shown in Table 1 in Examples 2-5.

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Abstract

The invention discloses a halogen-free flame-retardant polyolefin sheath material and a preparation method thereof, and the halogen-free flame-retardant polyolefin sheath material comprises the following components in percentage by weight: 5-12wt% of ethylene-vinyl acetate copolymer, 5-10wt% of ethylene-methyl acrylate copolymer, 5-12wt% of metallocene polyethylene, 3-12wt% of polyolefin elastomer and 3-6wt% of modified compatilizer, and 60-70 wt% of a compound flame retardant, wherein the compound flame retardant contains aluminum hydroxide, magnesium hydroxide and a silicate compound shell forming agent. Compared with the prior art, the halogen-free flame-retardant polyolefin sheath material has the advantages that the nucleating agent in the composite flame retardant can realize full mixing and dispersion of the material, the aluminum hydroxide and the magnesium hydroxide, the halogen-free flame-retardant polyolefin sheath material in which the composite flame retardant is uniformly dispersed is obtained, and the shell forming agent is combusted to form a fastened honeycomb plane structure; a carbon layer formed by the flame retardant can effectively disperse radiation heat flow from the position over the material, the radiation heat flow cannot drop in the combustion process, mass loss in the combustion process can be restrained, and the heat release speed and the smoke generation speed are reduced.

Description

technical field [0001] The present invention relates to a kind of polyolefin sheath material, more specifically, the present invention relates to a kind of halogen-free flame-retardant polyolefin sheath material and preparation method thereof. Background technique [0002] In recent years, digital communication transmission cables have developed rapidly and have been widely used in various occasions. While digital communication transmission cables provide convenience, they also bring fire risks. After digital communication transmission cables are ignited due to their own or external reasons, they may spread in the building along the direction of cable laying, causing fires and burning. This produces various toxic fumes. [0003] At present, the digital communication transmission cables laid in most areas of the country are mainly made of PVC. With the improvement of safety awareness, the demand for high flame-retardant materials is increasing, and people's requirements for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L53/00C08K3/22C08K7/26C08K3/34H01B3/44
CPCC08L23/0853C08L23/0815C08L53/00H01B3/441C08L2201/02C08L2201/22C08L2203/202C08K2003/2227C08K2003/2224C08L23/0869C08K3/22C08K7/26C08K3/346
Inventor 程金星郑俊明
Owner 中广核拓普(湖北)新材料有限公司
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