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Halogen-free flame retardant polyethylene-nylon heat shrinkable tube and preparation method thereof

A technology of flame-retardant polyethylene and heat-shrinkable tubes, which is applied in the field of halogen-free flame-retardant heat-shrinkable tubes, can solve the problems of inability to realize raw material recycling and high production costs, and achieve ideal effects of good heat resistance and flame retardancy

Inactive Publication Date: 2017-01-04
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

[0002] At present, the materials used to produce heat shrinkable tubes mainly include polyolefin materials (such as ethylene-vinyl acetate copolymer), rubber materials (such as silicone rubber), polyester materials (such as polyethylene terephthalate ester), etc., but the vast majority of heat shrinkable tubes made of the above materials require complex process steps such as chemical or radiation crosslinking, the production cost is high, and the recycling of raw materials cannot be realized

Method used

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  • Halogen-free flame retardant polyethylene-nylon heat shrinkable tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Halogen-free flame-retardant polyethylene-nylon heat-shrinkable tube.

[0027] Weigh 50 kg of low-density polyethylene, nylon ( ) 5 kg, styrene-butadiene-styrene block copolymer 0.5 kg, sodium phosphate 10 kg, nano-active calcium carbonate (particle size 25 nm) 0.5 kg and nano-silica (particle size 10 nm) 0.5 kg , and mix the above components evenly to obtain a premix;

[0028] (2) Granulate the premix obtained in step (1) at 200°C, and extrude it into a pipe on a single-screw extruder;

[0029] (3) Expand the tube obtained in step (2) by 2 times at 170°C, and then quench and form it to obtain a halogen-free flame-retardant polyethylene-nylon heat-shrinkable tube.

Embodiment 2

[0030] Example 2: Halogen-free flame-retardant polyethylene-nylon heat-shrinkable tube.

[0031] Weigh low-density polyethylene 80 kg, nylon ( ) 20 kg, styrene-butadiene-styrene block copolymer 5 kg, sodium phosphate 30 kg, nano-active calcium carbonate (particle size 100 nm) 5 kg and nano-silica (particle size 50 nm) 5 kg , and mix the above components evenly to obtain a premix;

[0032] (2) Granulate the premix obtained in step (1) at 200°C, and extrude it into a pipe on a single-screw extruder;

[0033] (3) Expand the tube obtained in step (2) by 2 times at 170°C, and then quench and form it to obtain a halogen-free flame-retardant polyethylene-nylon heat-shrinkable tube.

Embodiment 3

[0034] Embodiment 3: Halogen-free flame-retardant polyethylene-nylon heat-shrinkable tube.

[0035] Weigh 55 kg of low-density polyethylene, nylon ( ) 8 kg, styrene-butadiene-styrene block copolymer 1 kg, sodium phosphate 15 kg, nano-active calcium carbonate (30nm particle size) 1 kg and nano-silicon dioxide (20 nm particle size) 1 kg, And the above components are mixed uniformly to obtain a premix;

[0036] (2) Granulate the premix obtained in step (1) at 200°C, and extrude it into a pipe on a single-screw extruder;

[0037] (3) Expand the tube obtained in step (2) by 2 times at 150°C, and then quench and form it to obtain a halogen-free flame-retardant polyethylene-nylon heat-shrinkable tube.

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Abstract

The invention discloses a halogen-free flame retardant polyethylene-nylon heat shrinkable tube and a preparation method thereof. Specifically, the halogen-free flame retardant polyethylene-nylon heat shrinkable tube comprises the following components in parts by weight: 50-80 parts of polyethylene, 5-20 parts of nylon, 0.5-5 parts of segmented copolymer, 10-30 parts of phosphate retardant, 0.5-5 parts of active nano-calcium carbonate and 0.5-5 parts of nanosilicon dioxide. Compared with the prior art, the halogen-free flame retardant polyethylene-nylon heat shrinkable tube uses a physical crosslinking method, the polyethylene and the nylon do not form a covalent bond, the molecular structure is not broken, and the subsequent recovery is implemented; the materials do not contain hazardous substances like mercury, cadmium and hexavalent chromium, so that the requirements of the RoHS (Restriction of Hazardous Substances) directives of European Union are met, and the halogen-free flame retardant polyethylene-nylon heat shrinkable tube is harmless to the environment and human bodies; the halogen-free flame retardant polyethylene-nylon heat shrinkable tube is excellent in heat resistance, insulativity and fire resistance, and comparatively ideal in mechanical strength, and can be widely applied in various fields.

Description

technical field [0001] The invention belongs to the technical field of halogen-free flame-retardant heat-shrinkable tubes, and relates to a halogen-free flame-retardant polyethylene-nylon heat-shrinkable tube and a preparation method thereof. Background technique [0002] At present, the materials used to produce heat shrinkable tubes mainly include polyolefin materials (such as ethylene-vinyl acetate copolymer), rubber materials (such as silicone rubber), polyester materials (such as polyethylene terephthalate ester), etc., but most of the heat-shrinkable tubes made of the above materials require complex process steps such as chemical or radiation crosslinking, the production cost is high, and the recycling of raw materials cannot be realized. Therefore, it is of great significance to use a polymer material with a physically cross-linked structure to prepare a heat-shrinkable tube through a direct injection molding production process. Contents of the invention [0003]...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L77/10C08L53/02C08K3/32C08K3/26C08K3/36
CPCC08L23/06C08K2201/003C08K2201/011C08L2201/02C08L2201/08C08L2201/22C08L2203/18C08L2205/03C08L2207/062C08L2207/066C08L2312/00C08L77/10C08L53/02C08K2003/324C08K2003/265C08K3/36
Inventor 周宏敏周运
Owner 苏州泰斯拓伟机电设备有限公司
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