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Soft low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof

A technology of polyolefin cable materials and inorganic flame retardants, applied in the direction of insulating cables, cables, circuits, etc., can solve the problems of high flame retardant effect and reduction, and achieve the effects of excellent toughness, good processability, and superior flame retardant performance

Inactive Publication Date: 2010-09-01
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention needs to solve the problem that the existing halogen-free flame-retardant polyolefin materials have high flame-retardant effect but significantly reduced mechanical and electrical properties, and therefore provide a soft low-smoke type with high flame-retardant performance and good mechanical and electrical properties. Halogen-free flame retardant polyolefin cable compound

Method used

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  • Soft low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof
  • Soft low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof
  • Soft low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof

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Embodiment 1

[0026] Embodiment 1: the inorganic flame retardant adopts magnesium hydroxide, and the polymer compatibilizer adopts maleic anhydride grafted polyethylene; The processing aid adopts zinc stearate. No synergistic materials are added.

Embodiment 2

[0027] Embodiment 2: the inorganic flame retardant is magnesium hydroxide. The macromolecule compatibilizer adopts maleic anhydride grafted ethylene-vinyl acetate; the synergist composition (mass percentage) is: 20% of silicone rubber, ethylene-vinyl acetate copolymer (wherein the mass percentage content of vinyl acetate is 40%) %) 25%, silicon dioxide 25%, nickel oxide 10%, magnesium stearate 20%. Tetrakis [β-(3.5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester is used as antioxidant; polymer wax is used as processing aid.

Embodiment 3

[0028] Embodiment 3: Inorganic flame retardant adopts 75 parts of magnesium hydroxide and 20 parts of hydrotalcites (mass parts) and uses; Macromolecular compatibilizer adopts maleic anhydride grafted ethylene-vinyl acetate; Synergist forms (mass percentage ) is: 20% of silicone rubber, 20% of ethylene-vinyl acetate copolymer (wherein the mass percentage of vinyl acetate is 40%), 20% of silicon dioxide, 15% of ferrocene, and 25% of magnesium stearate; The antioxidant is tetrakis[β-(3.5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and the polymer of tert-octylamine triazine and ethylenediamine piperidine; the processing aid is ethylene Bisstearamide.

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Abstract

The invention discloses a soft low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof. The cable material comprises the following components (based on by mass part ratio): 80-90 parts of copolymer of ethylene-vinylacetate, 10-20 parts of linear low-density polyethylene, 65-130 parts of an inorganic fire retardant through surface treatment, 10-30 parts of high-effective flame retardant synergist, 10-20 parts of high molecular compatilizer, 0.9-1.5 parts of antioxidant and 1-2 parts of processing aid. The preparation method comprises the steps of resin blending extrusion; surface treatment of the inorganic fire retardant; batching, mixing, extrusion, granulation and the like. Compared with the prior art, the invention has the characteristics of predominant flame retardation (an oxygen index up to 36), excellent toughness, excellent bending resistance, low density (density is only 1.28g / cm<3>), low smoke, low corrosion, low toxicity, environmental protection, good processability, bright surface of extrudates and the like.

Description

technical field [0001] The invention relates to the field of halogen-free flame-retardant materials, in particular to a soft low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof. Background technique [0002] The existing conventional halogen-free flame-retardant polyolefin materials achieve high flame-retardant properties by adding a large amount of inorganic flame retardants, but adding a large amount of flame retardants will affect the mechanical and electrical properties of the material itself, making the material lack Softness, easy to crack, manifested as a significant decrease in tensile strength and elongation at break; volume resistivity, breakdown field strength decreased, and dielectric loss increased significantly. The reduction of these comprehensive properties limits the application of halogen-free flame-retardant polyolefin materials in cable materials. Contents of the invention [0003] The present invention nee...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L83/00C08L51/06C08K13/06C08K9/06C08K9/04C08K3/22C08K3/34C08K3/36C08K5/56C08K5/098B29C47/92H01B3/44H01B7/295B29C48/92
CPCB29C48/04B29C48/92B29C2948/92704B29C2948/92895
Inventor 徐曼李秀峰谢大荣曹晓珑李作强沈晓刚杨培杰韦志强
Owner XI AN JIAOTONG UNIV
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