Halogen-free heat shrinkable casing pipe and preparation method thereof

A heat-shrinkable sleeve and inorganic filler technology, which is applied in the field of low-cost halogen-free environmentally friendly heat-shrinkable tubes and their preparation, can solve problems such as the impact of heat-shrinkable sleeves, and achieve the effects of avoiding bridging, good comprehensive performance, and low cost

Inactive Publication Date: 2016-07-27
SHANGHAI CHANGYUAN ELECTRONICS MATERIAL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, a halogen-free heat-shrinkable sleeve and its preparation method are proposed, which solves the impact of halogen elements in the heat-shrinkable sleeve on the environment and health, and has the advantages of simple production, easy industrialization, and low cost. advantage

Method used

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  • Halogen-free heat shrinkable casing pipe and preparation method thereof
  • Halogen-free heat shrinkable casing pipe and preparation method thereof
  • Halogen-free heat shrinkable casing pipe and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing a halogen-free heat-shrinkable sleeve, which is applied to the above-mentioned halogen-free heat-shrinkable sleeve, and specifically includes the following steps:

[0034] S110 Weigh the weight of each component according to the formula described in claim 1, put all other raw materials except the inorganic filler into the low-speed mixer and stir for about 5 minutes according to actual needs, then mix the above-mentioned stirred raw materials and Inorganic fillers are put into a twin-screw loss-in-weight metering feeder, mixed and granulated by twin-screw at a temperature of 100-180°C, and masterbatch is obtained by an air-cooled heat cutter;

[0035] In S120, the above-mentioned masterbatch is further placed in a single-screw extruder, extruded at a temperature of 100-180°C, cooled and shaped into a pipe;

[0036] S130 The above-mentioned pipes are cross-linked by cobalt 60 or an electron accelerator with an ir...

specific Embodiment 1

[0041] Prepare materials according to the following formula: 40 parts of ethylene-vinyl acetate copolymer with a melt index of 1-3g / 10min, wherein the vinyl acetate content is 18%; 10 parts of linear low-density polyethylene with a melt index of 1-3g / 10min 10 parts of ethylene-octene copolymer with a melt index of 0.5-2g / 10min, wherein the octene content is 20-30%; particle size d 99 50 parts of high-gloss calcium carbonate ≦15μm, particle size d 99 20 parts of superfine magnesium hydroxide ≦15μm; 2 parts of compatibilizer (maleic anhydride grafted ethylene-vinyl acetate copolymer) with a grafting rate of 0.6-2.0%; 2 parts of lubricant (zinc stearate); 1 part of composite antioxidant; 2 parts of black masterbatch.

[0042] Specifically, the preparation method applied to the above-mentioned specific examples is as follows: in the twin-screw with a weight-loss metering feeder, put the above-mentioned prepared pellets and powder into different silos, and weigh them according to ...

specific Embodiment 2

[0045] Prepare materials according to the following formula: 50 parts of ethylene-vinyl acetate copolymers with a melt index of 1-3g / 10min, wherein the content of vinyl acetate is 18%; ethylene-octene copolymers with a melt index of 0.5-2g / 10min 5 parts, of which octene content is 20-30%; particle size d 99 50 parts of high-gloss calcium carbonate ≦15μm; 2 parts of compatibilizer (maleic anhydride grafted ethylene-vinyl acetate copolymer) with a grafting rate of 0.6-2.0%; 3 parts of lubricant (polyethylene wax); composite antioxidant 1.5 parts of agent; 2 parts of red masterbatch.

[0046] Specifically, the preparation method applied to the above specific examples is as follows: in a twin-screw with a loss-in-weight metering feeder, put the above-mentioned prepared raw materials and powder into different silos, and carry out the preparation according to the formula ratio through a metering scale. Blanking, twin-screw mixing and granulation temperature is 100-180°C, through ai...

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Abstract

The invention relates to a halogen-free environment-friendly material and an application thereof, and in particular, relates to a low-cost and halogen-free environment-friendly heat shrinkable pipe and a preparation method thereof, wherein the halogen-free environment-friendly heat shrinkable pipe comprises the following components by weight: 30-50 parts of an ethylene-vinyl acetate copolymer; 5-20 parts of a polyethylene and/or ethylene-octene copolymer; 50-70 parts of an inorganic filler; 0.5-2 parts of a lubricant; 0.3-1 part of a composite antioxidant; and 0-3 parts of a masterbatch; the influence of a halogen element contained in the heat shrinkable casing pipe on environments and body health is solved, and the heat shrinkable casing pipe has the advantages of simple production, easy industrialization, low cost and the like.

Description

technical field [0001] The invention relates to a halogen-free environment-friendly material and its application, in particular to a low-cost halogen-free environment-friendly heat-shrinkable tube and a preparation method thereof. Background technique [0002] Heat-shrinkable materials, also known as polymer shape memory materials, are intelligent materials that combine polymer materials with radiation processing technology. Ordinary polymer materials such as polyethylene, etc., after being irradiated by a radioactive source such as an electron accelerator, become a network structure, and these materials will have a unique "memory effect". The expanded, cooled and shaped materials can shrink and recover after being heated. original shape. The memory properties of heat-shrinkable materials can be used to make heat-shrinkable tubing, film and profiled materials. The main feature is that the heat-shrinkable material is coated on the surface of the object, which can play the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L51/00C08K13/02C08K3/26C08K3/34C08K3/22C08K5/134C08K5/372B29C69/02B29B9/06B29C47/10B29C35/08
Inventor 龙鹏李代双甘立民许兰杭
Owner SHANGHAI CHANGYUAN ELECTRONICS MATERIAL
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