Low-smoke halogen-free flame-retardant cable and manufacturing method thereof

A technology of flame retardant cables and flame retardants, applied in the direction of insulated cables, conductor/cable insulation, cables, etc., can solve problems such as cable failure, cable safety hazards, insulation performance degradation of the insulation layer, etc., and achieve the goal of improving the withstand voltage level Effect

Active Publication Date: 2012-10-24
JIANGSU ZHONGLI GRP CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the addition amount of phosphorus-nitrogen flame retardants is significantly lower than that of inorganic flame retardants, adding about 30wt% can obtain a better flame retardant effect, but due to the compatibility and other problems still exist, its influence on the comprehensive mechanical properties of materials Negative effects cannot be ignored. On the other hand, phosphorus-nitrogen flame retardants are more suitable for the flame retardancy of nylon, PET and other engineering plastic systems, while the flame retardancy of polyolefin cable materials will cause problems such as increased smoke density.
[0006] In addition, in order to make the cable insulation layer withstand the short-term high temperature under the state of breaking and short circuit,

Method used

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  • Low-smoke halogen-free flame-retardant cable and manufacturing method thereof

Examples

Experimental program
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Example Embodiment

[0050] Example 1 Preparation and performance of cable insulation layer

[0051] Raw material: The components and weight ratio of the outer layer are: linear low density polyethylene: magnesium hydroxide: montmorillonite = 45:50:5;

[0052] The composition and weight ratio of the intermediate layer are: linear low density polyethylene: vinyl trimethoxysilane: dicumyl peroxide: dibutyl tin dilaurate: stearic acid + zinc oxide = 95.4:1:0.1: 0.5:3;

[0053] The composition and weight ratio of the inner layer are: linear low-density polyethylene: vinyltrimethoxysilane: dicumyl peroxide: dibutyltin dilaurate: alkyl sulfonic acid + tin oxide = 95.3: 2: 0.2 :1:1.5;

[0054] Among them, the grade of linear low density polyethylene is 218W.

[0055] Preparation method: Weigh various raw materials according to the above ratio. The middle layer and the innermost layer are processed in the form of A\B material, that is, polyolefin resin base material (in this example, linear low-density polyethyl...

Example Embodiment

[0057] Example 2 Preparation and performance of cable insulation layer

[0058] Raw material: the components and weight ratio of the outer layer are: low density polyethylene: polyphosphate amine: pentaerythritol: montmorillonite = 67:20:10:3;

[0059] The composition and weight ratio of the intermediate layer are: low density polyethylene: vinyl triethoxy silane: benzoyl peroxide: stannous octoate: magnesium hydroxide = 93.5:1:0.5:1:4;

[0060] The composition and weight ratio of the inner layer are: low-density polyethylene: vinyl triethoxy silane: benzoyl peroxide: organic titanium chelate: alkyl sulfonic acid + tin oxide = 94.5: 2: 0.5: 2:1;

[0061] Among them, the low-density polyethylene brand name is DJ210.

[0062] Preparation method: same as Example 1, by controlling the distribution ratio of each layer of the multi-layer co-extrusion device, the thickness of each layer of the obtained cable insulation layer is: the thickness of the outer layer is 0.3 mm, the thickness of the...

Example Embodiment

[0064] Example 3 Preparation and performance of cable insulation layer

[0065] Raw material: The components and weight ratio of the outer layer are: low density polyethylene: aluminum hydroxide: montmorillonite = 47:50:3;

[0066] The composition and weight ratio of the intermediate layer are: low-density polyethylene: vinyltrimethoxysilane: 1,1-di-tert-butylperoxycyclohexane: tetraphenyltin: magnesium hydroxide = 94:1: 0.5:1:3.5;

[0067] The composition and weight ratio of the inner layer are: low density polyethylene: vinyl triethoxy silane: benzoyl peroxide: alkylbenzene sulfonic acid: benzene sulfonic acid + zinc oxide = 94.5: 2: 0.2: 2 ︰1;

[0068] Among them, the low-density polyethylene grade is QLT17.

[0069] Preparation method: same as Example 1, by controlling the distribution ratio of each layer of the multi-layer co-extrusion device, the thickness of each layer of the obtained cable insulation layer is: the thickness of the outer layer is 1.0 mm, the thickness of the mi...

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Abstract

The invention relates to the field of cables, and in particular relates to a low-smoke halogen-free flame-retardant cable and a manufacturing method thereof. The low-smoke halogen-free flame-retardant cable comprises a conductive core, wherein an insulating layer is arranged outside the conductive core and has a three-layer structure; the outer layer is made of low-smoke halogen-free flame-retardant polyolefin; and the middle layer and the inner layer are made of cross-linked polyolefin. The insulating layer of the cable is designed into an asymmetrical three-layer structure, so that the insulating layer has low-smoke halogen-free flame retardancy, excellent tensile strength, breaking elongation and other comprehensive mechanical properties, and the insulating layer of the cable has high voltage-resistant level.

Description

technical field [0001] The invention relates to the field of cables, in particular to a low-smoke, halogen-free, flame-retardant cable and a preparation method thereof. Background technique [0002] With the improvement of people's awareness of environmental protection and the acceleration of my country's social and economic construction, low-smoke, halogen-free and flame-retardant cables are widely used in important departments and public places such as high-rise buildings, subways, power plants, nuclear power plants, and rail transit. When a fire breaks out, the cable does not release corrosive gas when burning, and has good light transmission, which is of great help to rescue work and can reduce casualties and property losses to a large extent. [0003] The cable insulation layer refers to the outer layer of the cable core that plays an insulating role in the cable structure. At present, the insulation layer of the cable is mainly composed of polymers. The insulating lay...

Claims

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Application Information

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IPC IPC(8): H01B7/02H01B7/17H01B7/295H01B13/14
Inventor 王孝军杨杰杨其钱俊张尔梅张兴飞卫晓明苏桂明孔令蜜
Owner JIANGSU ZHONGLI GRP CO LTD
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