Formula, preparation method and application of heat-shrinkable sleeve

A heat-shrinkable sleeve and formula technology, applied in the directions of application, chemical instruments and methods, tubular articles, etc., can solve the problems of difficult control of glue output and stretching, high price of double-walled tubes, unfavorable production and processing, etc., and achieve good results. The effect of sealing performance, low cost, and low by-products

Inactive Publication Date: 2020-12-22
SHANGHAI CHANGYUAN ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the industrial field, especially in the automotive parts, electronic components and other industrial fields, heat-shrinkable sleeves are widely used in the protection schemes of metal and non-metal parts, but the use process is in an alternating cold and hot and humid environment, which is easy to Electrochemical corrosion occurs. The current common method is to put on a double-walled pipe, but because the inner layer of the double-walled pipe is hot-melt adhesive, there are the following technical defects: 1) The inner wall of the pipe is easily bonded to the protected parts during long-distance transportation in summer; 2) During use, due to the stability of the double-walled tube, it is difficult to control the amount of glue and stretching, which is not conducive to production and processing; 3) The price of double-walled tubes is expensive, and the cost pressure is relatively high

Method used

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  • Formula, preparation method and application of heat-shrinkable sleeve
  • Formula, preparation method and application of heat-shrinkable sleeve
  • Formula, preparation method and application of heat-shrinkable sleeve

Examples

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preparation example Construction

[0035] According to another embodiment provided by the present invention, it is a method for preparing a heat-shrinkable sleeve, comprising the following steps:

[0036] According to 50-90 parts of polyethylene, 5-45 parts of maleic anhydride or methacrylic grafted polyolefin, 1-5 parts of antioxidant, and 1-5 parts of carbon black masterbatch are blended and extruded through an extruder Granules, and then obtained by irradiation expansion. Preferably, the temperature of the extruder is 130-160°C. More preferably, the temperature of the extruder is 135°C.

[0037] In this preparation method, by mixing maleic anhydride or methacrylic grafted polyolefin into polyethylene, since maleic anhydride or methacrylic grafted polyolefin has both polar groups and olefin nonpolar The chain segment can have a better bonding effect with the surface of the metal pipe after heating, and it is difficult to tear off, and the temperature of the extruder only needs to be 130-160°C, which is low ...

Embodiment 1

[0041] According to 88 parts of linear low density polyethylene (melt index 4g / 10min), 10 parts of maleic anhydride graft modified polyethylene (maleic anhydride monomer content is 4%wt), 2 parts of antioxidant, 3 parts of carbon black masterbatch The parts are blended and granulated by an extruder at 135 ° C, extruded, cross-linked by irradiation, baked in an oven to soften, expanded by air expansion equipment, cooled and shaped to make a heat-shrinkable sleeve.

[0042] The performance test was carried out on the prepared heat-shrinkable sleeve, and the results are shown in Table 1 below:

[0043] Table 1. The mechanical performance test result of the heat-shrinkable sleeve prepared in embodiment 1

[0044]

[0045] The prepared heat-shrinkable sleeve shrinks on the aluminum tube after being baked at 200°C / 3min, and cannot be completely torn off by external force.

Embodiment 2

[0047] This embodiment is basically the same as Embodiment 1, the only difference is:

[0048] According to 50 parts of linear low density polyethylene (melt index 2g / 10min), 45 parts of maleic anhydride graft modified polyethylene (maleic anhydride monomer content is 1%wt), 4 parts of anti-aging agent, 1 part of carbon black masterbatch Parts were blended and extruded into granules through an extruder at 125°C.

[0049] The performance test was carried out on the prepared heat-shrinkable sleeve, and the results are shown in Table 2 below:

[0050] Table 2. The mechanical performance test result of the heat-shrinkable sleeve prepared in embodiment 2

[0051]

[0052] The prepared heat-shrinkable sleeve shrinks on the aluminum tube after being baked at 200°C / 4min, and cannot be completely torn off by external force.

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Abstract

The invention discloses a formula of a heat-shrinkable sleeve. The formula of the heat-shrinkable sleeve comprises the following components in parts by mass: 50-90 parts of polyethylene; 5-45 parts ofmaleic anhydride or methacrylic acid grafted polyolefin; 1-5 parts of an anti-aging agent; and 1-5 parts of carbon black master batch, wherein the melt index of the polyethylene is 2-10 g / 10 min; inthe maleic anhydride or methacrylic acid grafted polyolefin, the content of a comonomer is 1-5 wt%; the anti-aging agent is any one of a compound combination of more than one selected from amines, phenols, heterocycles, thioesters and phosphite esters; and the carbon black master batch comprises carbon black and polyolefin. Meanwhile, the invention further provides a preparation method and application of the heat-shrinkable sleeve according to the formula. Therefore, through the formula of the heat-shrinkable sleeve which is convenient to process and produce and relatively low in cost, the prepared heat-shrinkable sleeve can wrap metal or non-metal parts such as a rubber pipe, a wiring harness or a metal pipeline and the like; and meanwhile, the sleeve has good mechanical properties, is wrapped more densely and shows good sealing performance.

Description

technical field [0001] The invention belongs to the technical field of heat-shrinkable sleeves, and relates to a formula, a preparation method and an application of a heat-shrinkable sleeve. Background technique [0002] In the industrial field, especially in the automotive parts, electronic components and other industrial fields, heat-shrinkable sleeves are widely used in the protection schemes of metal and non-metal parts, but the use process is in an alternating cold and hot and humid environment, which is easy to Electrochemical corrosion occurs. The current common method is to put on a double-walled pipe, but because the inner layer of the double-walled pipe is hot-melt adhesive, there are the following technical defects: 1) The inner wall of the pipe is easily bonded to the protected parts during long-distance transportation in summer; 2) During use, due to the stability of the double-walled tube, it is difficult to control the glue output and stretching, which is not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/06C08L23/02C08K3/04B29C61/02B32B1/08B32B15/085B32B27/18B32B27/32B32B37/06
CPCC08L23/0815B29C61/025B32B1/08B32B15/085B32B27/18B32B27/32B32B37/06C08L2205/03C08L2205/02C08L2203/18B32B2264/108B32B2264/0257B32B2307/7265B32B2307/744B32B2307/714B32B2307/554B32B2597/00C08L51/06C08L23/02C08K3/04
Inventor 彭显扬乔孟雅王志邓成郜志刚
Owner SHANGHAI CHANGYUAN ELECTRONICS MATERIAL
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