Preparation method of low-smoke-density halogen-free flame retardant cable material

A flame retardant cable material, smoke density technology, applied in circuits, electrical components, plastic/resin/wax insulators and other directions, can solve the problems of poor compatibility, difficult processing, and the mechanical and mechanical properties of fuel resistance cannot meet the requirements. Achieve good flame retardant and mechanical properties, good interfacial compatibility

Active Publication Date: 2014-02-05
WUXI HAWEI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since polyolefin resin is a non-polar polymer, it has the disadvantage of poor compatibility with most flame retardants, including organic phosphates and inorganic aluminum hydroxide, so it is difficult to process, and the resulting flame retardant The mechanical properties can not meet the requirements

Method used

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  • Preparation method of low-smoke-density halogen-free flame retardant cable material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~ Embodiment 3

[0021] Embodiment 1 ~ embodiment 3 cable material preparation method is as follows:

[0022] Put aluminum hydroxide (97wt%, Japan Showa product, model H-42M), antioxidant 1010 (1.5wt%, BASF product) and dispersant KH570 (1.5wt%, Nanjing Qianqian chemical product) in a high mixer Mix at 1200 rpm for 5 minutes, and the mixing temperature is 60°C; add the above-mentioned aluminum hydroxide mixed with additives and linear low-density polyethylene into the single-screw extruder from different feeders according to the weight ratio of 97:3 , fully mixed and granulated, wherein the feeder speed is 30 kg / h, and the process parameters of the single-screw extruder are set as: processing temperature 160 ° C, melt temperature < 200 ° C, air-cut granulation; vacuum dryer Dry at 105°C for 6 hours to obtain polyethylene-coated aluminum hydroxide flame retardant particles; mix polyethylene, polyvinyl acetate, polypropylene, and the above polyethylene-coated aluminum hydroxide Flame retardant ...

Embodiment 1

[0027] Compared with Example 2, Example 1 appropriately reduces the content of coated aluminum hydroxide and increases the content of resin, which can improve the mechanical properties of the material, which is reflected in the increase of elongation at break and strength at break.

[0028] Compared with Example 1 and Example 3, increasing the content of polyvinyl acetate can further improve the interfacial compatibility between the resin and the flame retardant, and increase the elongation at break. However, due to the increase of the flexible structure in the material, its fracture strength decreased.

[0029] To sum up, the cable material prepared by the present invention can meet the requirement of low smoke density, and has good flame retardancy and mechanical properties at the same time.

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Abstract

The invention discloses a preparation method of a low-smoke-density halogen-free flame retardant cable material. The method comprises the following steps: after an inorganic flame retardant aluminum hydroxide is mixed with an antioxidant, a dispersant and other additives, and adding the obtained mixture and a certain amount of polyethylene resin into a single-screw extruder in proportion through different feeders, wherein the weight percentage of polyethylene is not more than 3%; after the added materials are fully mixed, carrying out granulating extrusion on the obtained mixture so as to prepare polyethylene coated aluminum hydroxide flame retardant particles; and adding the polyethylene coated aluminum hydroxide flame retardant particles, polyethylene, polyvinyl acetate and polypropylene resin into a twin-screw extruder in proportion through different feeders, and carrying out mixing and granulation on the obtained mixture so as to obtain the low-smoke-density halogen-free flame retardant cable material. The method disclosed by the invention is simple and effective, the prepared low-smoke-density halogen-free flame retardant cable material is good in flame retardant and mechanical properties, and after the low-smoke-density halogen-free flame retardant cable material is prepared into a cable, the cable can pass a wire smoke density test.

Description

technical field [0001] The invention belongs to the field of cable material and its manufacture, and in particular relates to a preparation method of a cable material satisfying low smoke density and having good mechanical properties. Background technique [0002] As people continue to pay attention to environmental health and sustainable development, the use of green materials to replace burning toxic polyvinyl chloride (PVC) materials has attracted more and more attention. In the field of wire and cable, a large number of halogen-free flame-retardant cable materials have been developed to meet the needs of different types of wires. However, in the European Union's wire and cable standard EN61034-2, wires also need to meet the requirements of low smoke density. Most of the flame retardants currently used, including phosphates, etc., and the resins used, such as polyester, polyphenylene ether, etc., have benzene rings in their molecular structures, which produce a lot of sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/12C08K13/06C08K9/10C08K3/22B29C47/92H01B3/44B29C48/92
CPCB29B9/06B29C48/92B29C2948/92704C08K2201/003C08L23/0815C08L2201/02C08L2201/22C08L2203/202C08L2205/03H01B3/441C08L31/04C08L23/12C08K9/10C08K2003/2227B29C48/04B29C48/40
Inventor 李斌
Owner WUXI HAWEI NEW MATERIAL TECH
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