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Halogen-free flame-retardant low-temperature-shrinkable heat shrink tube and preparation method thereof

A low-temperature shrinkage and heat-shrinkable tube technology, used in the field of heat-shrinkable tubes, can solve the problems of poor flame retardant performance, flame retardant components containing hazardous substances, and high heat shrinkage response temperature, and achieve ideal flame retardant performance and good processing. and use performance, environment and human body harmless effect

Inactive Publication Date: 2016-12-07
苏州泰斯拓伟机电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, these heat-shrinkable tubes have defects such as high heat shrinkage response temperature, poor flame retardancy, and hazardous substances contained in flame retardant components.

Method used

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  • Halogen-free flame-retardant low-temperature-shrinkable heat shrink tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Production of halogen-free flame-retardant low-temperature shrinkable heat-shrinkable tube.

[0022] (1) Weigh 50 kg of isotactic polypropylene, 40 kg of ethylene-methyl acrylate copolymer, 5 kg of melamine, 0.5 kg of nano-active calcium carbonate (particle size 25 nm), 0.5 kg of magnesium stearate and dibutyl Hydroxytoluene 0.5 kg, and mix homogeneously, obtain premix;

[0023] (2) Mix and granulate the premix obtained in step (1) on a twin-screw extruder equipped with an internal mixer, and extrude on a single-screw extruder to obtain a pipe;

[0024] (3) The tube obtained in step (2) was radiated and cross-linked at 150 kGy, heated and expanded by 2 times, and quenched and formed to obtain a halogen-free flame-retardant low-temperature shrinkable heat-shrinkable tube.

Embodiment 2

[0025] Example 2: Production of halogen-free flame-retardant low-temperature shrinkable heat-shrinkable tube.

[0026] (1) Weigh 80 kg of isotactic polypropylene, 10 kg of ethylene-methyl acrylate copolymer, 10 kg of melamine, 5 kg of nano-active calcium carbonate (with a particle size of 100 nm), 5 kg of magnesium stearate and dibutyl Hydroxytoluene 5 kg, and mix homogeneously, obtain premix;

[0027] (2) Mix and granulate the premix obtained in step (1) on a twin-screw extruder equipped with an internal mixer, and extrude on a single-screw extruder to obtain a pipe;

[0028] (3) The tube obtained in step (2) was radiated and cross-linked at 170 kGy, heated and expanded by 2 times, and quenched and formed to obtain a halogen-free flame-retardant low-temperature shrinkable heat-shrinkable tube.

Embodiment 3

[0029] Example 3: Production of halogen-free flame-retardant low-temperature shrinkable heat-shrinkable tube.

[0030] (1) Weigh 60 kg of isotactic polypropylene, 30 kg of ethylene-methyl acrylate copolymer, 6 kg of melamine, 1 kg of nano-active calcium carbonate (particle size 30 nm), 1 kg of magnesium stearate and dibutyl Hydroxytoluene 1 kg, and mix homogeneously, obtain premix;

[0031] (2) Mix and granulate the premix obtained in step (1) on a twin-screw extruder equipped with an internal mixer, and extrude on a single-screw extruder to obtain a pipe;

[0032] (3) The tube obtained in step (2) was radiated and cross-linked at 150 kGy, heated and expanded by 4 times, and quenched and formed to obtain a halogen-free flame-retardant low-temperature shrinkable heat-shrinkable tube.

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Abstract

The invention discloses a halogen-free flame-retardant low-temperature-shrinkable heat shrink tube and a preparation method thereof. Specifically, the halogen-free flame-retardant low-temperature-shrinkable heat shrink tube is prepared from the following components in parts by weight: 50-80 parts of polypropylene, 10-40 parts of olefin-acrylate copolymer, 5-10 parts of melamine flame retardant, 0.5-5 parts of nanometer activated calcium carbonate, 0.5-5 parts of lubricating agent and 0.5-5 parts of antioxidant. The halogen-free flame-retardant low-temperature-shrinkable heat shrink tube solves the problem that a response temperature is higher (120 DEG C or more), can achieve complete shrinkage in a lower temperature (90 DEG C or less), has ideal flame resistance and good processing and using performance, is free of harmful materials such as mercury, cadmium and hexavalent chromium, can meet the RoHS requirement of European Union, is free of halogen and red phosphorus, does not generate toxic substances after being burnt, and has no harm to environment and human.

Description

technical field [0001] The invention belongs to the technical field of heat-shrinkable tubes, and relates to a halogen-free flame-retardant low-temperature shrinkable heat-shrinkable tube and a preparation method thereof. Background technique [0002] Shape memory polymers are a class of polymer materials obtained by molecular combination and modification of conventional polymer materials, such as polyethylene, polyisoprene, (co)polyester, (co)polyamide, polyurethane, etc. Polymer materials are designed and adjusted in molecular structure so that they are endowed with a certain shape (initial state) under certain conditions, but when external conditions change, the shape changes accordingly and is fixed (variation). If the external environment changes again in a specific way and regularity, they can reversibly return to the original state. The external environment that prompts it to complete the above changes includes physical factors such as heat energy, light energy, el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/08C08K13/02C08K5/3492C08K3/26C08K5/098
CPCC08L23/12C08K2201/003C08K2201/011C08L2201/02C08L2201/22C08L2203/18C08L2207/10C08L2312/06C08L23/0869C08K13/02C08K5/34922C08K2003/265C08K5/098
Inventor 周宏敏
Owner 苏州泰斯拓伟机电设备有限公司