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Semi-hard halogen-free red phosphorus-free flame-retardant heat-shrinkable tubing and preparation method thereof

A heat-shrinkable sleeve, semi-rigid technology, applied in the field of semi-rigid halogen-free, red phosphorus-free flame-retardant heat-shrinkable sleeve and its preparation, can solve the problems of poor flame retardancy, environmental protection performance, environmental stress cracking resistance, etc.

Inactive Publication Date: 2021-05-18
CHANGYUAN ELECTRONICS DONGGUAN +2
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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 semi-rigid, halogen-free, red-phosphorous, flame-retardant heat-shrinkable sleeve, which aims to solve the existing heat-shrinkable tubes that still have environmental stress crack resistance, scratch resistance, and flame retardancy. Technical problems of poor safety and environmental performance

Method used

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  • Semi-hard halogen-free red phosphorus-free flame-retardant heat-shrinkable tubing and preparation method thereof
  • Semi-hard halogen-free red phosphorus-free flame-retardant heat-shrinkable tubing and preparation method thereof
  • Semi-hard halogen-free red phosphorus-free flame-retardant heat-shrinkable tubing and preparation method thereof

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preparation example Construction

[0024]The embodiment of the present invention also provides a method for preparing a semi-rigid halogen-free and red phosphorus-free flame-retardant heat-shrinkable sleeve, which specifically includes:

[0025] Weigh the raw materials according to the following parts by weight: 60-80 parts of ethylene-vinyl acetate copolymer, 20-30 parts of vinyl polymer, 40-60 parts of phosphorus nitrogen type flame retardant, 40-60 parts of inorganic flame retardant, 2-6 parts of compatibilizer, 1-2 parts of antioxidant, 1.5-3 parts of lubricant, 4-8 parts of silicone masterbatch and 6-10 parts of color masterbatch;

[0026] After mixing the above-mentioned components uniformly with a high-speed mixer, knead and extrude to granulate with an internal mixer at 105-135°C;

[0027] After the above-mentioned mixed pellets are homogenized, the masterbatch is obtained through a twin-screw extruder under the condition of 110-125°C, water-cooled strands, pelletized, and air-dried;

[0028] Extrude t...

Embodiment 1

[0033] Weigh the raw materials according to the following parts by weight: 80 parts of ethylene-vinyl acetate copolymer (brand 2803, Arkema), 20 parts of vinyl polymer (specifically take 5 parts of ethylene-octene copolymer (brand 8150, Dow) , 15 parts of medium-density polyethylene (grade 2310, Qatar)), 48 parts of phosphorus-nitrogen flame retardant (8 parts of melamine cyanurate, 20 parts of piperazine pyrophosphate, 20 parts of aluminum diethyl hypophosphite, Commercially available), 55 parts of inorganic flame retardants (specifically get 55 parts of aluminum hydroxide, commercially available), 5 parts of compatibilizers (specifically get the random copolymer of maleic anhydride and ethylene-acrylic acid butene copolymer (brand 4210 , Arkema)), 1.5 parts of antioxidant (specifically take antioxidant 1010, commercially available), 1.5 parts of lubricant (specifically take 0.5 part of polyethylene wax, 1.0 part of zinc stearate, commercially available), silicone 8 parts of ...

Embodiment 2

[0040] Weigh raw materials according to the following parts by weight: 80 parts of ethylene-vinyl acetate copolymer (brand 2803, Arkema), 25 parts of vinyl polymer (specifically take 5 parts of ethylene-octene copolymer (brand 8150, Dow) , 20 parts of medium density polyethylene (brand 2310, Qatar)), 55 parts of phosphorus nitrogen type flame retardant (specifically take 10 parts of melamine cyanurate, 25 parts of piperazine pyrophosphate, 20 parts of aluminum diethyl hypophosphite, Commercially available), 50 parts of inorganic flame retardants (specifically get 50 parts of aluminum hydroxide, commercially available), 5 parts of compatibilizers (specifically get the random copolymer of maleic anhydride and ethylene-acrylic acid butene copolymer (brand 4210 , Arkema)), 1.5 parts of antioxidant (specifically take antioxidant 1010, commercially available), 1.5 parts of lubricant (specifically take 0.5 part of polyethylene wax, 1.0 part of zinc stearate, commercially available), s...

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Abstract

The invention is suitable for the technical field of heat-shrinkable sleeves, and provides a semi-hard halogen-free red phosphorus-free flame-retardant heat-shrinkable sleeve and a preparation method thereof. The heat-shrinkable sleeve is prepared from the following components in parts by weight: 60-80 parts of an ethylene-vinyl acetate copolymer, 20-30 parts of a vinyl polymer, 40-60 parts of a phosphorus-nitrogen flame retardant, 40-60 parts of an inorganic flame retardant, 2-6 parts of a compatilizer, 1-2 parts of an antioxidant, 1.5-3 parts of a lubricant, 4-8 parts of silicone master batch and 6-10 parts of color master batch. The polyolefin base material adopted by the invention has good environmental stress cracking resistance, tear resistance, puncture resistance and the like, and the silicone master batch can improve the scratch resistance of the product and play a role in synergistic flame retardance; the compound flame retardant does not contain halogen and red phosphorus, meets the environmental protection requirement, and has good flame retardance; in the method, the raw materials are subjected to melt blending, extrusion, irradiation crosslinking and expansion shaping to obtain the heat-shrinkable sleeve with good environmental stress cracking resistance, scratch resistance, flame retardance and environmental protection performance.

Description

technical field [0001] The invention belongs to the technical field of heat-shrinkable sleeves, and in particular relates to a semi-rigid, halogen-free, red phosphorus-free, flame-retardant heat-shrinkable sleeve and a preparation method thereof. Background technique [0002] With the continuous development of the global society and economy, the industrial scale of the main application fields of heat-shrinkable materials such as power transmission, automobiles, consumer electronics, household appliances, and communications at home and abroad continues to expand, which drives the continuous growth of market demand for heat-shrinkable materials. [0003] At present, heat-shrinkable sleeves are used on objects with good ductility, such as wire harnesses or copper bars, which inevitably require mechanical bending or manual beating and bending during subsequent processing, which requires heat-shrinkable sleeves to have good durability. Environmental stress cracking performance; a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L83/04C08K13/06C08K13/02C08K9/06C08K3/22C08K5/3492C08K5/3462C08K5/5313C08J3/28C08J3/24
CPCC08L23/0853C08J3/28C08J3/246C08L2201/02C08L2201/22C08L2203/18C08L2205/035C08L2205/025C08K2003/2227C08K2003/2224C08J2323/08C08J2423/08C08J2423/06
Inventor 何洪瑞田冠楠吴松金刘晓播李菁罗荣坤
Owner CHANGYUAN ELECTRONICS DONGGUAN
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