Heat-shrinkable material, heat-shrinkable sleeve and preparation method

A heat-shrinkable sleeve and heat-shrinkable technology, applied in the field of materials, can solve the problems of high shrinkage ratio of heat-shrinkable materials, wide range of heat-shrinkable temperature, and difficult-to-tear heat-shrinkable materials, achieving strong tightening force and easy tearing Ability, color transparent, easy to remove effect

Pending Publication Date: 2022-05-13
SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a heat-shrinkable material, a heat-shrinkable sleeve and a preparation method, aiming to solve the problem that the heat-shrinkable material is not easy to tear in the non-shrinking direction, and the heat-shrinkable material of the present invention has a high shrinkage ratio, Wide heat shrinkage temperature range

Method used

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  • Heat-shrinkable material, heat-shrinkable sleeve and preparation method
  • Heat-shrinkable material, heat-shrinkable sleeve and preparation method
  • Heat-shrinkable material, heat-shrinkable sleeve and preparation method

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preparation example Construction

[0052] The present invention also proposes a method for preparing a heat-shrinkable sleeve, which is used to prepare the above-mentioned heat-shrinkable sleeve, comprising the following steps:

[0053] Masterbatch processing: Stir and mix low-density polyethylene, linear low-density polyethylene, ethylene copolymer, antioxidant and nucleating agent evenly, then add finely ground polyethylene wax, stir evenly, extrude and cool to obtain kneading Materials; wherein, the extrusion temperature is 130°C-180°C;

[0054] Extruding into a tube: extruding the mixed material to obtain a semi-finished casing; wherein, the extrusion temperature of the mixed material is 130°C-190°C;

[0055] Irradiation: irradiating the semi-finished casing through an electron accelerator or a cobalt source;

[0056] Expansion and cooling: after irradiation, the semi-finished sleeve is expanded at 130-260° C.; then cooled and shaped to obtain a heat-shrinkable sleeve; wherein, the expansion ratio is 2-4. ...

Embodiment 1

[0063] A heat-shrinkable sleeve, in parts by weight, its preparation materials include: 80 parts of low-density polyethylene, 10 parts of linear low-density polyethylene, 10 parts of ethylene-vinyl acetate copolymer (EVA), hindered phenolic antioxidant 0.05 parts, 2 parts of polyethylene wax, 0.3 parts of sorbitol.

[0064] The preparation method of the heat-shrinkable sleeve:

[0065] Masterbatch processing: Stir and mix low-density polyethylene, linear low-density polyethylene, EVA, hindered phenolic antioxidants and sorbitol evenly, then add finely ground polyethylene wax, stir evenly, extrude and cool to obtain kneading Materials; wherein, the extrusion temperature is 130°C-180°C;

[0066] Extruding into a tube: extruding the mixed material to obtain a semi-finished casing; wherein, the extrusion temperature of the mixed material is 130°C-190°C;

[0067] Irradiation: irradiating the semi-finished casing through an electron accelerator or a cobalt source;

[0068] Expans...

Embodiment 2

[0070] A heat-shrinkable sleeve, in parts by weight, its preparation materials include: 70 parts of low-density polyethylene, 10 parts of linear low-density polyethylene, 20 parts of EVA, 0.3 parts of hindered phenolic antioxidant, 1 part of polyethylene wax, 0.2 parts of sorbitol.

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Abstract

The invention provides a heat-shrinkable material, a heat-shrinkable sleeve and a preparation method, and the heat-shrinkable material is prepared from the following materials in parts by weight: 50-80 parts of low-density polyethylene, 10-30 parts of linear low-density polyethylene, 1-20 parts of ethylene copolymer, 0.05-0.5 part of antioxidant, 0.5-2 parts of polyethylene wax and 0.05-0.3 part of nucleating agent. The problem that the thermal shrinkage material is not easy to tear in the non-shrinkage direction is solved.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a heat-shrinkable material, a heat-shrinkable sleeve and a preparation method. Background technique [0002] Heat-shrinkable tubes are mainly used in electronic appliances, aerospace, medical vehicles, petrochemicals, nuclear power and other fields, mainly to protect internal materials and components; in related technologies, the materials of heat-shrinkable tubes are mainly made of linear polymer materials through electronic Beam, cobalt source or ultraviolet light irradiation becomes a network polymer, forming a network memory structure, so that the material can be heated and shrunk. However, this also caused the heat shrinkable tube to tear, due to the formed network structure, it was impossible to move from one end of the heat shrinkable tube along its non-shrinkable surface without using mechanical means (cutting, scratching, cutting, grinding, etc.). direction of tear re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08
CPCC08L23/06C08L2203/18C08L2207/066C08L23/0815C08L23/0853
Inventor 黄昭政王宇源陈韩江冯雪雁
Owner SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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