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Puncture-resistant insulating double-layer heat shrink tube and preparation method thereof

A double-layer heat-shrinkable tube, puncture-resistant technology, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the complex and cumbersome preparation process of double-layer sleeves, highly toxic hydrogen fluoride gas, high cost, etc. problem, to achieve the effect of eliminating the hidden danger of breakdown, high tear strength and low cost

Pending Publication Date: 2022-07-29
CHANGYUAN ELECTRONICS DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a puncture-resistant insulating double-layer heat-shrinkable tube, which aims to solve the problems of the existing single-layer PET sleeve, polyolefin heat-shrinkable sleeve, and vinylidene fluoride sleeve. Brittle, easy to crack, high cost, the combustion of vinylidene fluoride will produce highly toxic hydrogen fluoride gas and other defects, and the existing double-layer casing has complex and cumbersome preparation processes

Method used

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  • Puncture-resistant insulating double-layer heat shrink tube and preparation method thereof
  • Puncture-resistant insulating double-layer heat shrink tube and preparation method thereof
  • Puncture-resistant insulating double-layer heat shrink tube and preparation method thereof

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preparation example Construction

[0032] The embodiment of the present invention also provides a preparation method of a puncture-resistant insulating double-layer heat-shrinkable tube, comprising:

[0033] According to the formula of the above-mentioned puncture-resistant insulating double-layer heat-shrinkable tube, each raw material is weighed for standby;

[0034]The flame retardant polyethylene terephthalate, EPDM rubber graft modified acrylate, flame retardant thermoplastic elastomer material, polyethylene terephthalate-1,4-cyclohexanediol Methyl ester, polyethylene naphthalate, polytetramethylene terephthalate and antioxidant are mixed and granulated to obtain outer layer granules, which are for subsequent use;

[0035] The outer layer pellets and the inner layer pellets composed of conductive polyethylene terephthalate are placed in 70-80 ° C and under the pressure conditions of negative pressure -0.8 to -1 bar for drying treatment 2- After 4 hours, a double-layer tube is obtained by extrusion process...

Embodiment 1

[0046] The outer layer is modified with commercially available flame retardant PET materials, and the specific components are as follows: 50 parts of flame retardant PET (JC-G530-N-HI, Jiangsu Jiuchuan), 5 parts of EPDM-DICP prepared above, and flame retardant TPE 5 parts (Shanghai Huahe 45A), 3 parts of PETG, 3 parts of PEN, 1 part of PBT and 0.5 part of antioxidant, the above components are mixed and granulated for later use. The inner layer is made of commercially available conductive PET material (nairui PET-NRVC7463). Before extrusion, the outer layer of flame retardant polyester material and the inner layer of the pellets made of semi-conductive polyester material should be dried at 75°C in a drying box under negative pressure -0.9bar to remove water for 3 hours. The raw materials are extruded into double-layer pipes that are extruded through the combined unit. The extruded tube blanks are cooled by cooling water after leaving the extrusion die, and then vacuum expanded ...

Embodiment 2

[0048] The outer layer is modified with commercially available flame retardant PET materials, and the components and mass parts are as follows: 50 parts of flame retardant PET (Yuyao Beihua 3030F), 10 parts of EPDM-DICP prepared above, and 5 parts of flame retardant TPE (Shanghai Hehe Co., Ltd.). Hua 50A), 3 parts of PETG, 3 parts of PEN, 1 part of PBT and 0.5 part of antioxidant, the above components are mixed and granulated for later use. The inner layer is made of commercially available conductive PET material (nairui PET-NRVC7463). Before extrusion, the outer layer of flame retardant polyester material and the inner layer of the pellets made of semi-conductive polyester material should be dried at 75°C in a drying box under negative pressure -0.9bar to remove water for 3 hours. The raw materials are extruded into double-layer pipes that are extruded through the combined unit. The extruded tube blanks are cooled by cooling water after leaving the extrusion die, and then vac...

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Abstract

The invention is applicable to the technical field of high polymer materials, and provides a puncture-resistant insulating double-layer heat-shrinkable tube and a preparation method thereof. Flame-retardant polyethylene glycol terephthalate is used as a main material, and ethylene propylene diene monomer grafted modified acrylate, a flame-retardant thermoplastic elastomer material and polyethylene glycol terephthalate-1, 2-propylene glycol are compounded according to a proportion, so that the puncture-resistant insulating double-layer heat-shrinkable tube is obtained. 2, 4-cyclohexanedimethanol ester, polyethylene naphthalate and polytetramethylene terephthalate are used as outer layer materials of the composite material, so that the composite material has good puncture resistance and cracking resistance; the inner layer is made of a conductive polyethylene glycol terephthalate material, so that electric field concentration at the tip can be avoided, and the breakdown hidden danger of a weak link of a withstand voltage test is eliminated. The material meets the environmental protection regulations such as RoHS and the like, meets the pressure-resistant and flame-retardant requirements of new energy automobiles, is simple in preparation process, does not need a radiation crosslinking process, is low in cost, and is beneficial to popularization and application.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a puncture-resistant insulating double-layer heat shrinkable tube and a preparation method thereof. Background technique [0002] The polyolefin composite heat-shrinkable tube in the heat-shrinkable composite tube, its types include: heat-shrinkable composite tube for heat-shrinkable power cable accessories (the outer layer is conductive polyolefin material, the inner layer is insulating polyolefin material), the main tube composite tube ( The outer layer is insulating polyolefin material, the inner layer is conductive polyolefin material), and the electronic and electrical waterproof sealing protection composite pipe (the outer layer is insulating polyolefin material, and the inner layer is hot melt adhesive material), etc. There are also double-layer heat-shrinkable sleeves for insulation and protection of new energy vehicles, the outer layer is halogen-free flame-ret...

Claims

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Application Information

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IPC IPC(8): B32B1/08B32B27/36B32B27/18B32B27/06C08L67/02C08L51/06C08L25/06B29C48/00B29C48/09B29C48/21
CPCB32B1/08B32B27/36B32B27/18B32B27/08C08L67/02B29C48/023B29C48/09B29C48/21C08L2201/02C08L2207/04C08L2203/18B32B2250/02B32B2250/244B32B2307/206B32B2307/50B32B2597/00C08L51/06C08L25/06
Inventor 刘晓播吴松金田冠楠何洪瑞方泽耿
Owner CHANGYUAN ELECTRONICS DONGGUAN
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