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Preparation method of flame retardant flexible heat-shrinkable tube

A heat-shrinkable sleeve and flexible technology, which is applied in the field of preparation of flame-retardant flexible heat-shrinkable sleeves, can solve the problems of heat-shrinkable materials that do not have flame-retardant properties, poor toughness of heat-shrinkable sleeves, stress cracking, etc. The effect of cracking, increased intercalation distance, and enhanced interfacial bonding force

Inactive Publication Date: 2018-11-13
田秋珍
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that the current heat-shrinkable sleeve material is mainly plastic, due to the limitation of materials, the heat-shrinkable material often does not have good flame retardancy, and the toughness of the heat-shrinkable sleeve is poor. , the defect of stress cracking is prone to occur at the bend, and a preparation method of a flame-retardant flexible heat-shrinkable sleeve is provided

Method used

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  • Preparation method of flame retardant flexible heat-shrinkable tube

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Embodiment Construction

[0022] Add 600-700mL of ethanol aqueous solution with a mass fraction of 40% into the three-necked flask, transfer the three-necked flask to a water bath, heat up to 70-80°C, add 30-35g of magnesium aluminum hydrotalcite to the three-necked flask, and start Stir and mix with a magnetic stirrer at a speed of 350-400r / min for 1-2 hours to obtain a uniformly dispersed hydrotalcite suspension; put 70-80g potassium monododecyl methyl phosphate into the above-mentioned hydrotalcite suspension, stir Mix for 5-10 minutes, adjust the pH of the hydrotalcite suspension to 4-5 with hydrochloric acid with a mass fraction of 15%, heat up to 80-90°C, stir and react for 6-7 hours to obtain a white slurry, put the white slurry in vacuum filtration After suction filtration in the machine, remove the filtrate and separate to obtain a white filter residue, wash the white filter residue with absolute ethanol, place it in an oven with a set temperature of 90-100°C, and dry it for 7-8 hours to obtain...

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Abstract

The invention relates to the technical field of preparation of tubes, in particular to a preparation method of a flame retardant flexible heat-shrinkable tube. The preparation method comprises the following steps: mixing phragmites australis powder, organic modified hydrotalcite and ethyl acetate to obtain wood stone fibers; putting high density polyethylene masterbatch particles into a rubber refining machine for smelting and doping the wood stone fibers to obtain a rubber compound; transferring the rubber compound to an internal mixer and doping an ethylene-vinyl acetate copolymer for treatment to obtain the flame retardant flexible heat-shrinkable tube. The lignin is adsorbed to the fiber surface and in pores, so that an interfacial binding force between wood fibers and polyethylene isenhanced and further the heat-shrinkable tube becomes soft and resilient; the magnesium aluminum hydrotalcite is enabled to lose interlayer water molecules and interlayer anions and a dehydroxylationreaction is initiated in the combustion process of the heat-shrinkable tube, so as to play a role of protecting polymers and isolating air and further improve the flame retardant property of the heat-shrinkable tube. The broad application prospect is achieved.

Description

technical field [0001] The invention relates to the technical field of pipe material preparation, in particular to a preparation method of a flame-retardant flexible heat-shrinkable sleeve. Background technique [0002] Heat shrinkable sleeves, also known as heat shrinkable protective sleeves, provide insulation and protection for wires, cables and wire ends. Due to the advantages of high-temperature shrinkage, softness, flame retardancy, and insulation and corrosion resistance, heat shrinkable sleeves are widely used for insulation protection of various wiring harnesses, solder joints, and inductors, as well as rust and corrosion protection for metal pipes and rods. As the outer insulating coating of these components, on the one hand, it can effectively protect the electronic components, and on the other hand, the information of the electronic components can be marked on the surface of the heat shrinkable tube for easy identification. [0003] Common methods for preparing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L97/02C08L83/04C08K9/04C08K3/26B29C59/16B29C35/02
CPCB29C35/02B29C59/165C08K2201/011C08L23/06C08L2201/02C08L2203/18C08L2203/20C08L2205/035C08L2205/16C08L2207/062C08L23/0853C08L97/02C08L83/04C08K9/04C08K3/26
Inventor 田秋珍邓博陈帅
Owner 田秋珍
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