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Ultrathin high-power contraction type heat shrinkable sleeve and preparation method thereof

A heat-shrinking, high-magnification technology, which is applied in the field of ultra-thin high-power shrinkage heat-shrinkable sleeves and its preparation, can solve the problems of not having ultra-thin wall thickness characteristics, failing to achieve, and miniaturization, etc., to help thinning Stretching, high yield, satisfying the effect of miniaturization

Inactive Publication Date: 2018-05-11
SHANGHAI CHANGYUAN ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the wall thickness of the product is required to be ≤0.13mm and the shrinkage ratio ≥2.5, but many heat shrinkable sleeves on the market cannot meet this requirement
When preparing heat-shrinkable sleeves, some manufacturers use a special extrusion molding process to process a heat-shrinkable sleeve. Although the shrinkage strength of the sleeve is high, it does not have the characteristics of ultra-thin wall thickness and cannot meet the requirements of miniaturization.

Method used

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  • Ultrathin high-power contraction type heat shrinkable sleeve and preparation method thereof
  • Ultrathin high-power contraction type heat shrinkable sleeve and preparation method thereof
  • Ultrathin high-power contraction type heat shrinkable sleeve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw materials of ultra-thin wall thickness high-power shrinkage heat shrinkable sleeve are calculated in parts by weight:

[0024] 100 parts of polymer matrix, 10 parts of polyolefin elastomer, 0.5 parts of maleic anhydride graft copolymer, 6 parts of decabromodiphenyl ether, 3 parts of magnesium hydroxide, 1 part of antimony trioxide, 0.5 parts of polyethylene wax, 0.5 part of polybasic hindered phenol, 0.1 part of siloxane coupling agent. As shown in Table 1:

[0025] Table 1:

[0026]

[0027] The above-mentioned raw materials were added into an internal mixer and mixed for processing to prepare a modified masterbatch of an ultra-thin-wall thick casing. The processing temperature was 100° C., and the mixing time of the internal mixer was 20 minutes.

[0028] The modified masterbatch prepared above is extruded into a pipe semi-finished product, and the extrusion molding processing temperature is 90°C

[0029] The tube is irradiated and cross-linked by an ele...

Embodiment 2

[0033] The raw materials of ultra-thin wall thickness high-power shrinkage heat shrinkable sleeve are calculated in parts by weight:

[0034] 100 parts of polymer matrix, 15 parts of EPDM rubber, 15 parts of silicone rubber, 2 parts of acrylate copolymer, 20 parts of decabromodiphenyl ether, 13 parts of magnesium hydroxide, 7 parts of antimony trioxide, polyethylene 2 parts of wax, 2 parts of antioxidant, 2 parts of siloxane coupling agent. As shown in Table 2:

[0035] Form 2:

[0036]

[0037] Add the above-mentioned raw materials into an internal mixer and mix them to prepare a modified masterbatch of an ultra-thin wall thickness casing. The processing temperature is 110° C., and the internal mixer mixing time is 20 minutes.

[0038] The modified masterbatch prepared above is extruded into a pipe semi-finished product, and the extrusion molding processing temperature is 150°C

[0039] The tube is irradiated and cross-linked by an electron accelerator to maintain an ap...

Embodiment 3

[0043] The raw materials of ultra-thin wall thickness high-power shrinkage heat shrinkable sleeve are calculated in parts by weight:

[0044] 100 parts of polymer matrix, 10 parts of polyolefin elastomer, 5 parts of styrene-butadiene-styrene copolymer, 1 part of acrylate copolymer, 15 parts of brominated polystyrene, 8 parts of magnesium hydroxide, three 4 parts of antimony oxide, 0.6 parts of polyethylene wax, 1.5 parts of thioester compound, and 0.5 parts of siloxane coupling agent.

[0045] As shown in Table 3:

[0046] Form 3:

[0047]

[0048] Add the above-mentioned raw materials into an internal mixer and mix them to prepare a modified masterbatch of an ultra-thin wall thickness casing. The processing temperature is 130° C., and the internal mixer mixing time is 20 minutes.

[0049] The modified masterbatch prepared above is extruded into semi-finished pipe products, and the extrusion molding processing temperature is 130°C

[0050] The tube is irradiated and cros...

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Abstract

The invention provides an ultrathin high-power contraction type heat shrinkable sleeve and a preparation method thereof. A heat shrinkable material is prepared from the following components in parts by weight: 100 parts of a polymer matrix, 10 to 30 parts of an elastomer, 0.5 to 2 parts of a compatilizer, 10 to 40 parts of a flame retardant, 0.5 to 2 parts of a lubricant, 0.5 to 2 parts of an antioxidant and 0.1 to 2 parts of a dispersant. The method comprises the following steps: step 1, preparing preparation components of the heat shrinkable material; step 2, after mixing the preparation components, treating through double screw rods to prepare a modified master batch; step 3, putting the modified master batch into an extrusion molding machine, and performing extrusion molding to obtaina pipe semi-finished product; step 4, irradiating the pipe semi-finished product through an electron accelerator; step 5, expanding the irradiated pipe. The heat shrinkable sleeve prepared by the preparation method has the characteristics of high contraction intensity and ultrathin wall thickness and can be applied to mini-type electronic equipment.

Description

technical field [0001] The invention relates to the field of heat-shrinkable sleeves, in particular to an ultra-thin high-shrinkage heat-shrinkable sleeve and a preparation method thereof. Background technique [0002] Heat-shrinkable sleeve, also known as heat-shrinkable protective sleeve, has the advantages of high-temperature shrinkage, softness, flame retardancy, insulation and corrosion resistance, and is widely used in the electronic and electrical industries. The heat-shrinkable sleeve is shrink-wrapped on the electronic and electrical wiring harness, and plays an insulating and protective role on the electronic and electrical wiring harness. [0003] In recent years, the miniaturization and light weight of electronic and electrical equipment have gradually become the development trend of the industry, which puts forward more stringent requirements for the wall thickness and shrinkage ratio of heat shrinkable tubing products. Generally speaking, the wall thickness of...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/00C08L51/00C08L23/08C08L23/16C08L83/04C08L25/06C08K13/02C08K5/06C08K3/22C08K5/13C08K5/5415C08J7/12
CPCC08J7/123C08J2323/06C08J2323/08C08J2423/00C08J2423/16C08K2003/2224C08L23/06C08L23/0853C08L23/0869C08L2203/18C08L2203/20C08L2205/025C08L2205/035C08L2207/066C08L23/00C08L51/00C08K13/02C08K5/06C08K3/22C08K3/2279C08K5/13C08K5/5415C08L23/16C08L83/04C08L33/04C08L25/06
Inventor 顾陆於刘虎李俊杰
Owner SHANGHAI CHANGYUAN ELECTRONICS MATERIAL
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