Water resistance tree medium voltage insulated cable material and cable
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A technology for insulating cables and water tree resistance, which is used in plastic/resin/wax insulators, organic insulators, etc. to achieve good water solubility, good compatibility, and perfect crystal structure.
Inactive Publication Date: 2008-10-08
广州爱宜德高分子材料科技有限公司 +1
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Conventional cross-linked polyethylene materials cannot solve this technical bottleneck, and prolong
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[0040] Example 1: Preparation of Organized Montmorillonite by Microwave
[0041] Add 25g of montmorillonite and 750g of deionized water, heat up to 75 degrees, add dropwise a 20% aqueous solution containing 12g of dinonyldimethylammonium bromide. After the addition is complete, treat with microwave for 7 minutes every 45 minutes , Stir for 5 hours, filter with suction, wash the precipitate with deionized water, silver nitrate (0.1mol / L) can not detect bromide ions, vacuum dry to constant weight, grind and sieving through 200 meshes to obtain organically modified montmorillonite earth.
Example Embodiment
[0042] Example 2: Preparation of medium voltage cross-linked polyethylene insulated cable material
[0043] The formula composition of the weight parts of the medium voltage cross-linked polyethylene insulated cable material:
[0044] Low density polyethylene 100 parts
[0045] Dicumyl peroxide 1.8 parts
[0046] 0.6 parts of di-tert-butylperoxycumene
[0047] 0.1 part of tris(2,4-di-tert-butylphenyl) phosphite
[0048] 4,4'-thiobis(3-methyl-6-tert-butylphenol) 0.3 parts
Example Embodiment
[0049] Example 3-9: According to Example 2, the formula of the compound water tree growth agent was changed to prepare the water tree resistant medium pressure cross-linked polyethylene insulated cable material, as shown in Table 1:
[0050] Table 1. Medium voltage insulated cable materials prepared by adding different water tree growth agents with reference to the basic formula of Example 2
[0051] Example
[0052] Weight unit in the table: parts
[0053] It can be seen from Table 1 that the addition of the compound type water tree resistance agent has significantly better water tree resistance performance than a single water tree resistance agent.
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Abstract
The present invention provides a WTR medium voltage insulating cable material and a cable made of the material, and pertains to cable domain. A medium voltage WTR irradiated polyethylene insulating material is produced by adding a compound WTR growth promoting agent; the compound WTR growth promoting agent comprises hydrogenated polysaccaride, organized montmorillonite, maleic anhydride grafts, and silicone polymer between molecular weight 1000-5000; the parts by weight of the ingredients of the WTR medium voltage insulating cable material are: low density polyethylene: 100, maleic anhydride grafts: 2-10, hydrogenated polysaccaride: 0.2-1, organized montmorillonite: 0.01-1.5, silicone polymer: 0.01-1.5, cross-linking agent: 2-3, and antioxidant: 0.3-0.5. The insulating material in the present invention has WTR growth function, break through the bottle neck of WT growth of the cable insulation itself, and can prolong the service life of the cables. With the WTR medium voltage insulating cable material, environment protective halogen-free flame retardant medium voltage WTR irradiated polyethylene insulated power cables or PVC medium voltage WTR irradiated polyethylene insulated power cables can be manufactured.
Description
technical field [0001] The water-tree-resistant medium-voltage insulating cable material and the cable of the invention belong to the field of cables. Background technique [0002] At present, my country is implementing urban and rural power grid transformation, western development and large-scale upgrading and transformation of communication facilities, and there is a large demand for wire and cable products. On the one hand, the service life of the cable is affected by external factors such as fire and rat ant erosion. On the other hand, the growth of water trees in the cable insulation layer itself is an important reason affecting the cable. Conventional cross-linked polyethylene materials cannot solve this technical bottleneck, and prolonging the service life of cables is an important means to ensure the normal operation of the power grid. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of conventional medium-vol...
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