Heat-shrinkable sleeve free of foaming after being heated and preparation method thereof

A heat-shrinkable sleeve and polyethylene technology, which is applied in the field of heat-shrinkable sleeves, can solve the problems of bubbling and swelling of the tube wall of insulating materials, loss of insulation protection performance, and inability to discharge gas, so as to reduce the insulation performance and reduce the price. , Excellent cost-effective effect

Inactive Publication Date: 2020-07-14
NANTONG DINGSHANG ELECTRONICS MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dehydration temperature of aluminum hydroxide is about 300°C, and the decomposition temperature of magnesium hydroxide is 340-490°C when heated. When the shrinkage temperature during heat shrinkage is higher than the decomposition temperature of aluminum hydroxide or magnesium hydroxide, it is very easy to generate gas due to the decomposition of the flame retardant, and the gas generated by the decomposition of the flame retardant cannot be discharged inside the insulating material. The final result is When the insulating material is heated, especially when it is heat-shrinked at high temperature, the pipe wall of the insulating material foams and expands, and it is seriously honeycombed, losing its insulating protection performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A heat-shrinkable sleeve that does not foam when heated, comprising the following components in parts by weight: 50 parts of polyethylene, 10 parts of diisooctyl sodium sulfonate, 15 parts of inorganic flame retardant, ethylene trisodium 10 parts of metapolymer, 12 parts of plasticizer, 5 parts of stabilizer, 1 part of sensitizer, 0.5 parts of nano-silica, 1 part of carbon black, 2 parts of masterbatch.

[0018] Wherein, the inorganic flame retardant is zinc borate, the ethylene terpolymer is ethylene-vinyl acetate-carboxyl terpolymer, the stabilizer is a rare earth stabilizer, and the sensitizer is trimethylolpropane trimethacrylate .

[0019] The preparation method of the heat-shrinkable sleeve provided in this example, the specific steps are as follows: firstly put polyethylene, sodium diisooctyl succinate sulfonate, ethylene-vinyl acetate-carboxyl terpolymer, adipic acid disulfide according to the formula Ester plasticizer, rare earth stabilizer, nano-silica, carbo...

Embodiment 2

[0021] A heat-shrinkable sleeve that does not foam when heated, comprising the following components in parts by weight: 80 parts of polyethylene, 40 parts of diisooctyl sodium sulfonate, 20 parts of inorganic flame retardant, ethylene three 20 parts of metapolymer, 18 parts of plasticizer, 9 parts of stabilizer, 3 parts of sensitizer, 5 parts of nano-silica, 8 parts of carbon black, and 6 parts of masterbatch.

[0022] Among them, the inorganic flame retardant is activated kaolin, the ethylene terpolymer is ethylene-n-butyl acrylate-carboxyl terpolymer, the stabilizer is a complex stabilizer formed of rare earth stabilizer and calcium stearate, and the sensitizer For trimethylolpropane triacrylate.

[0023] The preparation method of the heat-shrinkable sleeve provided in this embodiment, the specific steps are as follows: firstly put in polyethylene, sodium diisooctyl succinate sulfonate, ethylene-n-butyl acrylate-carboxyl terpolymer, diethylene glycol according to the formula...

Embodiment 3

[0025] A heat-shrinkable sleeve that does not foam when heated, comprising the following components in parts by weight: 65 parts of polyethylene, 25 parts of diisooctyl sodium sulfonate, 16 parts of inorganic flame retardant, ethylene trisodium 15 parts of metapolymer, 15 parts of plasticizer, 7 parts of stabilizer, 2 parts of sensitizer, 2.5 parts of nano silicon dioxide, 5 parts of carbon black, 4 parts of masterbatch.

[0026] Among them, the inorganic flame retardant is a mixture of zinc borate and activated kaolin, the ethylene terpolymer is a mixture of ethylene-vinyl acetate-carboxyl terpolymer and ethylene-n-butyl acrylate-carboxyl terpolymer in any proportion, and the stabilizer It is a complex stabilizer formed of a rare earth stabilizer and zinc stearate, and the sensitizer is a mixture of trimethylolpropane trimethacrylate and trimethylolpropane triacrylate in any proportion.

[0027] The preparation method of the heat-shrinkable sleeve provided in this embodiment,...

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Abstract

The invention discloses a heat-shrinkable sleeve free of foaming after being heated and a preparation method thereof. Specifically, the heat-shrinkable sleeve is prepared from a modified polyethylenematerial irradiated by an electron accelerator, in parts by weight, the modified polyethylene material is prepared from the following components: 50-80 parts of polyethylene, 10-40 parts of sodium diethylhexyl sulfosuccinate, 15-20 parts of an inorganic flame retardant, 10-20 parts of an ethylene terpolymer, 12-18 parts of a plasticizer, 5-9 parts of a stabilizer, 1-3 parts of a sensitizer, 0.5-5parts of nano silicon dioxide, 1-8 parts of carbon black and 2-6 parts of color masterbatch. A product which does not contain substances limited in an ROHS instruction is also used in other raw materials; the performance of the heat-shrinkable sleeve prepared by adopting the new formula is not reduced at all, the heat-shrinkable sleeve can completely meet the international standard, and the product is simple in preparation method, low in material price and suitable for industrial production, and is an environment-friendly product with excellent cost performance.

Description

technical field [0001] The invention relates to the technical field of heat-shrinkable sleeves, in particular to a heat-shrinkable sleeve that does not bubble when heated and a preparation method thereof. Background technique [0002] Heat-shrinkable tubing has excellent flame retardant and insulating properties, and is widely used in wire connection, solder joint protection, wiring harness identification, resistance and capacitance insulation protection, metal pipe corrosion protection and other fields. [0003] Most of the currently commercially available heat-shrinkable sleeves contain flame retardants. Aluminum hydroxide and magnesium hydroxide are filled flame retardants. They release bound water and absorb a large amount of latent heat when they are decomposed by heat to reduce their heat shrinkage. The surface temperature of the filled synthetic material in the flame can inhibit the decomposition of the polymer and cool the combustible gas produced. The alumina and ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K5/42C08K3/36C08K3/38C08K3/04C08K3/34C08K13/06
CPCC08L23/06C08L2203/18C08L2312/06C08L2205/03C08L2312/00C08K2201/011C08K2003/387C08L23/0853C08K13/02C08K5/42C08K3/36C08K3/38C08K3/04C08L23/0869C08K13/06C08K3/346
Inventor 葛建平
Owner NANTONG DINGSHANG ELECTRONICS MATERIAL CO LTD
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