High-extrusion-rate heat-shrinkable tube and production method thereof

A heat-shrinkable sleeve and extrusion rate technology, which is applied in the high-extrusion-rate heat-shrinkable sleeve and its production field, can solve problems such as extrusion difficulties and poor product appearance, and achieve good processing and use performance, extrusion The effect of high speed

Inactive Publication Date: 2015-10-28
SHENZHEN WOER HEAT SHRINKABLE MATERIAL +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a heat-shrinkable sleeve with high extrusion molding rate, excellent physical and electrical properties, and a production method thereof, which solves the problem of difficulty in extrusion when the extrusion rate of the heat-shrinkable sleeve is increased, and the appearance of the product. bad question

Method used

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  • High-extrusion-rate heat-shrinkable tube and production method thereof
  • High-extrusion-rate heat-shrinkable tube and production method thereof
  • High-extrusion-rate heat-shrinkable tube and production method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0030] The preparation material of the heat-shrinkable sleeve provided by the present invention contains by weight:

[0031] 100 parts of vinyl polymer;

[0032] Flame retardant 0-70 parts;

[0033] Filling agent 0-60 parts;

[0034] Lubricant 0.1-5 parts;

[0035] Fluxing and dispersing agent 0.1-3 parts;

[0036] Antioxidant 0.1-10 parts;

[0037] 0-3 parts of cross-linking accelerator;

[0038] Masterbatch 0-10 parts.

[0039] Preferably, the vinyl polymer is low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-octene copolymer, ethylene-methyl acrylate copolymer, ethylene- One or several kinds of butyl acrylate copolymer and ethylene-propylene copolymer.

[0040] Preferably, the flame retardant is compounded from red phosphorus flame retardant and magnesium hydroxide.

[0041] Preferably, the red phosphorus-type flame retardant is one or a combination of two of the following flame retardants: r...

Embodiment 1

[0055] Take the following components according to the weight fraction:

[0056]

[0057] The above-mentioned materials are mixed and granulated by a banbury mixer, the banbury temperature is 90-130°C, and the banbury time is 10-20min. The granulated material from the banburying plant is then kneaded 1-3 times by a twin-screw extruder for granulation and packaging.

[0058] Then use a single-screw extruder with a length-to-diameter ratio of 25:1 to extrude a heat-shrinkable tube with an inner diameter of 32mm, a wall thickness of 2.8mm, and an extrusion temperature of 90-130°C.

[0059] The extruded pipe is irradiated with an electron accelerator with an energy above 4 MeV, and the cross-linked pipe is expanded by 1.5-4 times at 80-140°C.

[0060]Table 1 is the performance parameter table of the main test of embodiment 1 and comparative example 1.

[0061] Table 1

[0062] performance Example 1 Comparative example 1 Extrusion rate / Hz 21 39 Limitin...

Embodiment 2

[0064] Take the following components according to the weight fraction:

[0065]

[0066] The above-mentioned materials are mixed and granulated by a banbury mixer, the banbury temperature is 90-130°C, and the banbury time is 10-20min. The granulated material from the banburying plant is then kneaded 1-3 times by a twin-screw extruder for granulation and packaging.

[0067] Then use a single-screw extruder with a length-to-diameter ratio of 25:1 to extrude a heat-shrinkable tube with an inner diameter of 75mm, a wall thickness of 1.5mm, and an extrusion temperature of 90-130°C.

[0068] The extruded pipe is irradiated with an electron accelerator with an energy above 4 MeV, and the cross-linked pipe is expanded by 1.5-4 times at 80-140°C.

[0069] Table 2 is the performance parameter table of embodiment 2 and comparative example 2 main tests.

[0070] Table 2

[0071] performance Example 2 Comparative example 2 Extrusion rate / Hz 25 42 Limiting Oxy...

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Abstract

The invention discloses a high-extrusion-rate heat-shrinkable tube. The preparation materials of the high-extrusion-rate heat-shrinkable tube comprise, by weight, 100 parts of vinyl polymers, 0-70 parts of a fire retardant, 0-60 parts of filler, 0.1-5 parts of a lubricant, 0.1-3 parts of a flux dispersing agent, 0.1-10 parts of an antioxidant, 0-3 parts of a crosslinking accelerator and 0-10 parts of color master batch. The high-extrusion-rate heat-shrinkable tube has the advantages that not only is the extrusion rate high, but also the extrusion is stable in high speed, and good machining and use performances are also achieved.

Description

technical field [0001] The invention relates to a heat-shrinkable sleeve mainly used for insulation protection of wire and cable joints, busbars, etc., in particular to a heat-shrinkable sleeve with high extrusion rate and a production method thereof. Background technique [0002] From its birth to the present, heat shrinkable sleeves have undergone continuous development and are now widely used in aviation, aerospace, ships, locomotives, communications, chemicals, home appliances and other fields. With the tide of national economic transformation, various industries such as electronics, electric power, home appliances, and automobiles will usher in a broader market, which has also led to a further increase in the demand for heat-shrinkable sleeves. In the face of competition at home and abroad, quickly providing high-quality heat-shrinkable sleeves to the market has become one of the key factors for companies to compete for the market. The heat-shrinkable sleeve is extrude...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L27/18C08L27/20C08L27/16C08K13/06C08K9/10C08K3/02C08K3/22C08K3/26C08K5/098B29C69/00B29C35/08C08J3/22
CPCC08L23/0853C08J2323/08C08K2201/014C08L23/0869C08L2203/18C08L2205/025C08L2205/035C08L2207/066C08L2310/00
Inventor 谢鹏程康树峰冯雪雁刘督亮胡磊磊
Owner SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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