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B1-grade special high-flame-retardant low-smoke halogen-free cable material and preparation method thereof

A high flame retardant and cable material technology, which is applied in the direction of circuits, electrical components, plastic/resin/wax insulators, etc., to achieve the effects of enhancing interface interaction, improving strength, and improving mechanical properties

Inactive Publication Date: 2020-09-04
上海方之德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the above background, major cable factories now have higher requirements on the flame retardant performance of cables. However, the problems of low-smoke and halogen-free insulating cable materials on the amount of smoke and heat generated by combustion still need to be resolved.

Method used

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  • B1-grade special high-flame-retardant low-smoke halogen-free cable material and preparation method thereof
  • B1-grade special high-flame-retardant low-smoke halogen-free cable material and preparation method thereof
  • B1-grade special high-flame-retardant low-smoke halogen-free cable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1: A B1-grade special high flame-retardant low-smoke halogen-free cable material, the components and their corresponding parts by weight are shown in Table 1, as figure 1 , and obtained by the following steps:

[0046] S1, adding linear low density polyethylene, ethylene-vinyl acetate copolymer, aluminum hydroxide, modified nano-silica and montmorillonite into a high mixer, stirring at 600rpm for 5min to obtain a mixture A;

[0047] S2, adding antioxidant, compatibilizer and lubricant to mixture A, stirring at 600rpm for 5min to obtain mixture B;

[0048] S3, knead the compound B in a kneader, and then extrude and granulate through a twin-screw extruder. The output temperature of the kneader is 165°C, and the kneading time is 12min. 110°C, 120°C, 120°C, 120°C, 1350°C, 135°C, 135°C, 145°C, and the screw speed during extrusion is 200rpm.

[0049] In this example, the preparation method of modified nano-silica is as follows: add 10 parts of nano-silica with an av...

Embodiment 2-6

[0053] Example 2-6: A B1 grade dedicated high flame-retardant low-smoke halogen-free cable material. The difference from Example 1 is that the components and their corresponding parts by weight are shown in Table 1.

[0054] Each component and parts by weight thereof in table 1 embodiment 1-6

[0055]

[0056]

Embodiment 7

[0057] Example 7: A B1-grade special high flame-retardant low-smoke halogen-free cable material, which is different from Example 1 in that it is prepared through the following steps:

[0058] S1, adding linear low-density polyethylene, ethylene-vinyl acetate copolymer, aluminum hydroxide, modified nano-silica and montmorillonite into a high mixer, stirring at 800rpm for 3min, to obtain a mixture A;

[0059] S2, adding antioxidant, compatibilizer and lubricant to the mixture A, stirring at 800rpm for 3min to obtain the mixture B;

[0060] S3, knead the compound B in the kneader, and then extrude and granulate through the twin-screw extruder. 110°C, 120°C, 120°C, 120°C, 1350°C, 135°C, 135°C, 145°C, and the screw speed during extrusion is 200rpm.

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Abstract

The invention discloses a B1-grade special high-flame-retardant low-smoke halogen-free cable material and a preparation method thereof, and relates to the technical field of wires and cables. The technical key point is that the B1-grade special high-flame-retardant low-smoke halogen-free cable material comprises the following components in parts by weight: 25 to 50 parts of linear low-density polyethylene; 50 to 100 parts of an ethylene-vinyl acetate copolymer; 100 to 150 parts of aluminum hydroxide; 10 to 25 parts of modified nano silicon dioxide; 5 to 10 parts of montmorillonite; 1 to 5 parts of an antioxidant; 5 to 10 parts of a compatilizer; 5 to 10 parts of a lubricant; the preparation method of the modified nano silicon dioxide comprises the following steps: adding nano silicon dioxide into absolute ethyl alcohol, uniformly stirring and dispersing, then adding a silane coupling agent, heating to react for 3-4 hours, and drying and grinding the nano silicon dioxide after the reaction is finished so as to obtain the modified nano silicon dioxide. The obtained low-smoke halogen-free cable material has the advantages that the B1-grade flame-retardant standard is met, the mechanical property is high, and the processability is excellent.

Description

technical field [0001] The invention relates to the technical field of electric wires and cables, more specifically, it relates to a B1 grade special high flame-retardant low-smoke halogen-free cable material and a preparation method thereof. Background technique [0002] Most of the electrical fires in our country are caused by the aging and overloading of wires and cables. At the same time, the flammable insulation and sheath materials in the wires and cables are ignited during the fire, which further expands the fire accident. The toxic gas emitted by the burning of wire and cable insulation and sheath materials will cause a large number of casualties and hinder firefighters from extinguishing the fire. The main feature of low-smoke halogen-free flame retardant is that all materials do not contain halogen, and the amount of smoke released during combustion is very small. The lethal gas concentration emitted by polyvinyl chloride material in 30 minutes is 15 times that of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08K13/06C08K9/06C08K3/36C08K3/22C08K3/34C08K7/00C08K5/526C08K5/372H01B3/44
CPCC08L23/0853H01B3/441C08K2201/011C08K2201/003C08K2003/2227C08L2201/02C08L2201/22C08L2203/202C08L2205/03C08L2205/035C08L2205/02C08L23/0815C08L51/06C08K13/06C08K9/06C08K3/36C08K3/22C08K3/346C08K7/00C08K5/526C08K5/372
Inventor 董建东何亚丽李俊龙
Owner 上海方之德新材料有限公司
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