Thermoplastic oil-resistant halogen-free low-smoke flame-retardant polyolefin cable material and preparation method thereof

A polyolefin cable material, low-smoke and flame-retardant technology, applied in the direction of insulating cables, plastic/resin/wax insulators, cables, etc., can solve the problems of low crystallinity, poor oil resistance, affecting cracking resistance, etc., and achieve elongation at break High efficiency and heat cracking resistance, improve elongation at break and tensile strength, and reduce the effect of melt fracture

Active Publication Date: 2012-10-17
中广核三角洲(江苏)塑化有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional halogen-free low-smoke flame-retardant polyolefin cable material is thermoplastic if it does not need to be cross-linked by radiation, that is, thermoplastic halogen-free low-smoke flame-retardant polyolefin cable material, but this thermoplastic halogen-free low-smoke flame-retardant polyolefin cable It is difficult for the material to pass the mineral oil immersion test in GB/T 2951.21-2008, that is, its resistance to mineral oil is poor, so this product cannot be used in environments with mineral oil such as tank trucks and oil pipelines, making it suitable for Occasions are restricted
The reason for the poor oil resistance of traditional thermoplastic halogen-free low-smoke flame-retardant polyolefin cable materials is that the EVA...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: A thermoplastic oil-resistant, halogen-free, low-smoke, flame-retardant polyolefin cable material and its preparation method

[0044] 1. Raw material formula

[0045] components parts by mass MLLDPE (Exxon Mobil company product, product grade: 3518CB) 63 Ethylene-vinyl acetate copolymer (vinyl acetate content less than 30%) 22 Maleic anhydride graft of ethylene-hexene copolymer 15 Aluminum hydroxide 152 polyethylene wax 3 Tetrakis[β-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate]pentaerythritol ester (Antioxidant 1010) 1.5

[0046] 2. Preparation process

[0047] After fully mixing the above-mentioned components by mass in a high-speed mixer, they are mixed, extruded, and granulated in a co-rotating twin-screw extruder at a processing temperature range of 125-145°C.

[0048] 3. Material properties

[0049] The tensile strength of the thermoplastic oil-resistant, halogen-free, low-smoke, flame-retardant po...

Embodiment 2

[0050] Example 2: A thermoplastic oil-resistant, halogen-free, low-smoke, flame-retardant polyolefin cable material and its preparation method

[0051] 1. Raw material formula

[0052] components parts by weight MLLDPE (product of DOW company, product grade: 5220G) 61 Ethylene-vinyl acetate copolymer (vinyl acetate content less than 30%) 28 Maleic anhydride graft of ethylene-hexene copolymer 11 Aluminum hydroxide 163 Zinc stearate 3 Tetrakis[β-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate]pentaerythritol ester (Antioxidant 1010) 1.5

[0053] 2. Preparation process

[0054] Same as embodiment one.

[0055] 3. Material properties

[0056] The tensile strength of the thermoplastic oil-resistant, halogen-free, low-smoke, flame-retardant polyolefin cable material prepared according to the above formula and process is 12.2MPa, the elongation at break is 180%, the limiting oxygen index is 36%, and the density is 1.49g / cm 3 , volu...

Embodiment 3

[0057] Example 3: A thermoplastic oil-resistant, halogen-free, low-smoke, flame-retardant polyolefin cable material and its preparation method

[0058] 1. Raw material formula

[0059] components parts by weight MLLDPE (MITSUI company product, product brand: SP2040) 75 Ethylene-vinyl acetate copolymer (vinyl acetate content less than 30%) 10 Maleic anhydride graft of ethylene-hexene copolymer 15 Aluminum hydroxide 150 polyethylene wax 2 Tetrakis[β-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate]pentaerythritol ester (Antioxidant 1010) 1.5

[0060] 2. Preparation process

[0061] Same as embodiment one.

[0062] 3. Material properties

[0063] The tensile strength of the thermoplastic oil-resistant, halogen-free, low-smoke, flame-retardant polyolefin cable material prepared according to the above formula and process is 13.3MPa, the elongation at break is 220%, the limiting oxygen index is 33%, and the density is 1.45g / cm 3 ...

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Abstract

The invention relates to a thermoplastic oil-resistant halogen-free low-smoke flame-retardant polyolefin cable material. The material is characterized in that: the material is prepared from raw materials of: substrate resin, a fire retardant, a lubricating agent, and an anti-oxidant. The substrate resin is composed of metallocene linear low-density polyethylene (MLLDPE), an ethylene-vinyl acetate polymer, and an interface compatibilizing agent. The preparation method comprises the steps that: the raw materials are well mixed in a high-speed mixing machine; the mixture is subjected to mixed extrusion under a processing temperature of 125-145 DEG C on a same-direction double-screw extruder; and the material is subjected to hot-cut granulation, such that a finished product is obtained. Compared with a traditional thermoplastic halogen-free low-smoke flame-retardant polyolefin cable material, the cable material provided by the invention has good oil resistance. When the cable material is soaked in mineral oil, the change rates in tensile strength and breaking elongation are low.

Description

technical field [0001] The invention relates to a thermoplastic oil-resistant, halogen-free, low-smoke, flame-retardant polyolefin cable material and a preparation method thereof, belonging to the technical field of materials for wire and cable insulation and sheathing (cable material for short). Background technique [0002] Traditional halogen-free low-smoke flame-retardant polyolefin cable materials mostly use ethylene-vinyl acetate copolymer (EVA) as the main resin base material, supplemented by a small amount of linear low-density polyethylene (LLDPE) to improve the high-temperature deformation resistance of the cable material sex. Among them, ethylene-vinyl acetate copolymer is made by copolymerization of ethylene (E) and vinyl acetate (VA), referred to as EVA, which has good softness and elasticity. It is solid at room temperature, and when heated and melted to a certain extent, it becomes a fluid with a certain viscosity. Linear low density polyethylene is produced...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L31/04C08L51/00C08K13/06C08K9/06C08K3/22C08K5/098C08K5/134H01B3/44H01B7/295
Inventor 齐兴国
Owner 中广核三角洲(江苏)塑化有限公司
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