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

A polyolefin cable material, low temperature resistance technology, applied in the direction of insulating cables, cables, circuits, etc., can solve the problems of high swelling rate, low crystallinity, easy hardening and cracking, etc., to improve low temperature resistance performance, improve low temperature resistance, The effect of improving interface compatibility

Active Publication Date: 2013-04-17
JIANGSU LINRY NEW MSTAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for this type of cable material to pass the mineral oil immersion test in GB / T 2951.21-2008, which limits the application of this type of traditional cable material
Affected by the vinyl acetate monomer, the crystallinity of EVA is relatively low, resulting in a high swelling rate in mineral oil, and the damage to the crystal region by the inorganic flame retardant in the halogen-free material makes EVA the main substrate. The thermoplastic halogen-free flame-retardant polyolefin cable compound has poor resistance to mineral oil
When the material is used in a low-temperature environment, especially when the ambient temperature is minus 60°C, the traditional low-smoke halogen-free flame-retardant polyolefin cable compound is easy to harden and crack. LLDPE has a high degree of crystallinity, and its The mineral oil resistance of LLDPE is better than that of EVA, but when a large amount of inorganic flame retardant is added to LLDPE to make low-smoke, halogen-free flame-retardant polyolefin cable materials, its elongation at break and low-temperature cracking resistance are very poor, and cannot Meet the use standard of the material

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This example is a low-temperature-resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material:

[0017] (1) Raw material formula:

[0018] As shown in the following table:

[0019]

[0020] (2) Preparation process:

[0021] First mix the matrix resin, aluminum hydroxide, polyethylene wax and antioxidant fully in a high-speed mixer according to the formula, then extrude through a co-rotating twin-screw extruder at a processing temperature range of 110°C, and then grind the surface Cut into granules by a hot cutting machine, transport and cool by a cyclone separator, and sieve by a vibrating sieve to finally make a low-temperature resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material.

[0022] (iii) Material properties:

[0023] The properties of the low-temperature, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material prepared according to the above formula and proc...

Embodiment 2

[0025] This example is a low-temperature-resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material:

[0026] (1) Raw material formula:

[0027] As shown in the following table:

[0028]

[0029] (2) Preparation process:

[0030] Firstly, base resin, aluminum hydroxide, polyethylene wax, and antioxidant are fully mixed in a high-speed mixer according to the formula, and then extruded through a co-rotating twin-screw extruder at a processing temperature range of 160°C, and then ground Cut into granules by a hot cutting machine, transport and cool by a cyclone separator, and sieve by a vibrating sieve to finally make a low-temperature resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material.

[0031] (iii) Material properties:

[0032] The properties of the low-temperature-resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material prepared according to the above formula ...

Embodiment 3

[0034] This example is a low-temperature-resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material:

[0035] (1) Raw material formula:

[0036] As shown in the following table:

[0037]

[0038] (2) Preparation process:

[0039] First, base resin, aluminum hydroxide, polyethylene wax, and antioxidant are fully mixed in a high-speed mixer according to the formula, and then extruded through a co-rotating twin-screw extruder at a processing temperature range of 120°C, and then ground Cut into granules by a hot cutting machine, transport and cool by a cyclone separator, and sieve by a vibrating sieve to finally make a low-temperature resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material.

[0040] (iii) Material properties:

[0041] The properties of the low-temperature-resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material prepared according to the above formula an...

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Abstract

The invention relates to a cable material and discloses a low-temperature resistant and oil resistant low-smoke halogen-free flame retardant polyolefin cable material and a preparation method thereof. The prescription of the cable material consists of MLLDPE (metallocene polyethylene), POE (polyolefin elastomer), interfacial compatibilizer, aluminium hydroxide, antioxygen and lubricant. The preparation method comprises the following steps: extruding and pelleting MLLDPE and POE base materials, interfacial compatibilizer, aluminium hydroxide, antioxygen and lubricant in a temperature zone at 110-160 DEG C via a double screw, and then packaging to instantly obtain a low-temperature resistant and oil resistant low-smoke halogen-free flame retardant polyolefin cable material finished product. Compared with the common low-smoke halogen-free flame retardant polyolefin cable material, the material provided by the invention has the advantages that the oil-resistant property is enhanced, the low-temperature resistant property of the product is greatly enhanced and the cracking problem of the low-smoke halogen-free flame retardant polyolefin cable material under low temperature is eliminated.

Description

technical field [0001] The invention relates to a cable material, in particular to a low-temperature-resistant, oil-resistant, low-smoke, halogen-free, flame-retardant polyolefin cable material and a preparation method thereof. Background technique [0002] Traditional low-smoke halogen-free flame-retardant polyolefin cable materials mostly use LLDPE (linear low-density polyethylene) and EVA (ethylene-vinyl acetate copolymer) as the main resin base material, supplemented by a small amount of PE graft (polyethylene grafted Branches) to improve the high temperature deformation resistance of the cable material. However, it is difficult for this type of cable material to pass the mineral oil immersion test in GB / T 2951.21-2008, which limits the application of this type of traditional cable material. Affected by the vinyl acetate monomer, the crystallinity of EVA is relatively low, resulting in a large swelling rate in mineral oil, and the damage to the crystal region by the ino...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L51/06H01B3/44H01B7/295C08K13/06C08K9/00C08K3/22B29B9/06
Inventor 郭振勤李得志
Owner JIANGSU LINRY NEW MSTAR TECH
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