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A low-voc halogen-free flame-retardant polyolefin cable material for locomotives

A technology for polyolefin cable materials and locomotives, which is applied to circuits, electrical components, organic insulators, etc., can solve problems such as lack of compatibility, scratch-and-scratch DC stability, and index exceeding, and achieve improved compatibility, Improves the effect of anti-aging properties

Active Publication Date: 2020-12-29
中广核拓普(湖北)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In general, because a large amount of inorganic flame retardants are added to the low-smoke halogen-free flame retardant mixture, in order to improve the compatibility between the inorganic flame retardants and the resin, it is necessary to add maleic anhydride grafts and coupling agents to Solved, however, the maleic anhydride graft contains a large amount of incompletely reacted maleic anhydride and other small molecules, which caused the index to exceed when testing TVOC
[0005] Without the addition of maleic anhydride grafts, the compatibility between the inorganic flame retardant and the resin in the mixture cannot reach a high degree of compatibility even if there is a coupling agent. Such a product It is easy to cause the problem of rubbing, scratching and whitening, and the problem of DC stability passing but not affecting the normal use of locomotive cables

Method used

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  • A low-voc halogen-free flame-retardant polyolefin cable material for locomotives
  • A low-voc halogen-free flame-retardant polyolefin cable material for locomotives
  • A low-voc halogen-free flame-retardant polyolefin cable material for locomotives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~3

[0056] Examples 1-3: A low-VOC halogen-free flame-retardant polyolefin cable material for locomotives, which consists of the following components. For comparison, comparative examples 4-5 are also given in Table 1, as shown in Table 1:

[0057] Table 1

[0058]

[0059] The preparation process comprises the following steps:

[0060] Step 1: Mix the polyolefin base material, compatibilizer and 100 parts of flame retardant according to the weight of the formula in a high-speed mixer for 30-50 seconds at high speed, and then mix, plasticize and granulate through a twin-screw granulator. The processing temperature is: conveying section 120-130°C, melting section 140-155°C, mixing section 150-160°C, exhaust section 155-165°C, homogenizing section 155-165°C, machine head 160-170°C;

[0061] Step 2: Add the above materials to the halogen-free flame retardant (minus 100 parts, already added in the first step) measured by formula weight, coupling agent, zinc oxide, silicone masterb...

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Abstract

The invention discloses a low-VOC halogen-free flame-retarding polyolefin cable material used for locomotives, which is composed of: 55-95 parts of an ethylene-vinyl acetate copolymer, 0.2-0.4 parts of an ethylene-maleic anhydride copolymer, 5-45 parts of polyethylene, 0.7-2 parts of ZnO, 120-165 parts of a halogen-free flame-retardant, 0.7-1.8 parts of a coupling agent, 1.5-3 parts of a crosslinking sensitizer, 1.4-2.4 parts of an antioxidant, 2-5 parts of a silicone master batch, and 0.5-1.2 parts of a lubricant. The cable material is low in TVOC value, has excellent anti-scraping white exposure effect and anti-oil effect, is excellent in direct current stability, is low-smoke and toxic-free, is environment-friendly and safe, and can be extruded rapidly. The cable material can be used for producing locomotive cables satisfying the standard EN50264 in requirement of CRRC.

Description

technical field [0001] The invention relates to the field of low-smoke, halogen-free, and flame-retardant cable materials, in particular to a low-VOC, halogen-free, and flame-retardant polyolefin cable material for locomotives. Background technique [0002] With the rapid development of the rail transit industry, the promulgation of EU ROHS and REACH environmental protection regulations, and the need for safety, the requirements for rail transit cables are getting higher and higher, and they must comply with GB / T 12528, TB / T 1484, EN 50264 Such as rolling stock cable standards, not only require locomotive cables safety, energy saving, high temperature resistance, oil resistance, halogen-free flame retardant, but also attach great importance to safety requirements. [0003] In September 2017, CRRC Changchun Railway Vehicles Co., Ltd. formulated the "Environmental Protection Control Requirements for Parts and Materials", which formulated the technical specifications for formal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/06C08L83/04C08K13/02C08K3/22C08K3/34C08K5/098H01B3/44
CPCC08K2003/2224C08K2003/2227C08K2003/2296C08K2201/003C08L23/0853C08L2201/02C08L2201/22C08L2203/202C08L2205/025C08L2205/035C08L2205/08C08L2207/062H01B3/441C08L23/06C08L23/0869C08L83/04C08K13/02C08K3/22C08K3/346C08K5/098
Inventor 曾光新费楚然高云
Owner 中广核拓普(湖北)新材料有限公司
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