Nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material and preparation thereof

A polyolefin cable material, nano-modification technology, applied in the direction of insulating cables, cables, circuits, etc., to achieve high toughness, improved shrinkage performance, and good powder holding effects

Active Publication Date: 2013-07-17
JIANGSU LINRY NEW MSTAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, provide a nano-modified low-shrinkage, low-smoke, halogen-free flame-retardant polyolefin cable material and its preparation method, and solve the conflicting problems caused by the addition of aluminum hydroxide. Technical problems, and compared with ordinary low-smoke halogen-free polyolefin cable materials, the obtained cable material greatly improves

Method used

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  • Nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material and preparation thereof
  • Nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material and preparation thereof
  • Nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] This embodiment is a nano-modified low-shrinkage, low-smoke, halogen-free flame-retardant polyolefin cable material:

[0021] (1) Raw material formula:

[0022] The following table:

[0023]

[0024] (2) Preparation process:

[0025] First, the matrix resin, aluminum hydroxide, nano-power powder, calcium stearate, and antioxidant are thoroughly mixed in a high-speed mixer according to the formula, and then subjected to banburying at a processing temperature of 120°C, and the same direction Extruded by twin-screw extruder, then cut into pellets by grinding eager cutting machine, cooled by cyclone separator, sieved by vibrating screen, and finally made into nano-modified low-shrink low-smoke halogen-free flame-retardant polyolefin cable material.

[0026] (3) Material characteristics:

[0027] The nano-modified low-shrinkage, low-smoke and halogen-free flame-retardant polyolefin cable material prepared according to the above formula and process has the following p...

Example Embodiment

[0028] Example 2

[0029] This embodiment is a nano-modified low-shrinkage, low-smoke, halogen-free flame-retardant polyolefin cable material:

[0030] (1) Raw material formula:

[0031] The following table:

[0032]

[0033] (2) Preparation process:

[0034] First, the matrix resin, aluminum hydroxide, nano-strength powder, calcium stearate, and antioxidant are thoroughly mixed in a high-speed mixer according to the formula, and then subjected to internal mixing and mixing at a processing temperature of 130°C. It is extruded by a screw extruder, then cut into pellets by a grinding eager cutting machine, conveyed and cooled by a cyclone separator, and screened by a vibrating screen, and finally made into nano-modified low-shrinkage, low-smoke, halogen-free flame-retardant polyolefin cable materials.

[0035] (3) Material characteristics:

[0036] The nano-modified low-shrinkage, low-smoke, halogen-free and flame-retardant polyolefin cable material prepared according to the above formula ...

Example Embodiment

[0037] Example 3

[0038] This embodiment is a nano-modified low-shrinkage, low-smoke, halogen-free flame-retardant polyolefin cable material:

[0039] (1) Raw material formula:

[0040] The following table:

[0041]

[0042] (2) Preparation process:

[0043] First, the matrix resin, aluminum hydroxide, nano-strength powder, calcium stearate, and antioxidant are thoroughly mixed in a high-speed mixer according to the formula, and then subjected to banburying at a processing temperature range of 150°C, in the same direction Extruded by twin-screw extruder, then cut into pellets by grinding eager cutting machine, cooled by cyclone separator, sieved by vibrating screen, and finally made into nano-modified low-shrink low-smoke halogen-free flame-retardant polyolefin cable material.

[0044] (3) Material characteristics:

[0045] The nano-modified low-shrinkage, low-smoke, halogen-free and flame-retardant polyolefin cable material prepared according to the above formula and process has the fo...

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Abstract

The invention relates to a cable material, and in particular relates to a nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material and a preparation method thereof. The polyolefin cable material comprises the following components: EVA (Ethylene Vinyl-acetate Copolymer), MLLDPE (Linear Low-Density Polyethylene), an interfacial compatibilizer, aluminum hydroxide, nanometer strong micropowder, an antioxidant and a lubricant. The preparation method comprises the following steps of: evenly stirring the EVA and the MLLDPE as basic materials, the interfacial compatibilizer, the aluminum hydroxide, the nanometer strong micropowder, the antioxidant and the lubricant in a high-speed mixer; performing banburying in a banbury mixer at the temperature between 120 and 150 DEG C; extruding by using double screw rods; granulating by grinding and hot-cutting; conveying materials by using a cyclone separator; and screening by using a vibrating screen and packaging, thereby obtaining the finished nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material product. Compared with the common low-smoke halogen-free and flame-retardant polyolefin cable material, the polyolefin cable material provided by the invention has the effects that the thermal aging resistance is enhanced; the shrinkage performance of the product is improved greatly; and the problem that the low-smoke halogen-free polyolefin cable material is easy to shrink at the high temperature is solved.

Description

technical field [0001] The invention relates to a cable material, in particular to a nano-modified low-shrinkage, low-smoke, halogen-free flame-retardant polyolefin cable material and its preparation. Background technique [0002] Most of the traditional low-smoke halogen-free flame-retardant polyolefin cable materials use LLDPE (linear low-density polyethylene) and EVA (ethylene-vinyl acetate copolymer) as the main resin base material, and PE graft (polyethylene graft) As a compatibilizer, a certain amount of aluminum hydroxide is added to obtain a low-smoke, halogen-free, flame-retardant polyolefin cable compound. However, it is difficult for this type of cable material to pass the heat shrinkage test required in electric cables or optical cables with a thermal shrinkage of less than 2%, which limits the application of this type of traditional cable material. Affected by vinyl acetate monomer, the crystallinity of EVA is relatively low, and it has a good ability to accomm...

Claims

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Application Information

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