Heat shrinkable tube and preparation method thereof

A heat-shrinkable tube and flame retardant technology, which is applied in the field of heat-shrinkable tube and its preparation, can solve the problems of high equipment investment cost, complicated operation and maintenance, etc., and achieve low radiation crosslinking cost, good heat resistance, and process simple effect

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

At present, most cross-linked heat-shrinkable sleeves are irradiated by radiation cross-linking method, but the investment cost of related equipment is relatively high, and the operation and maintenance are also relatively complicated.

Method used

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  • Heat shrinkable tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Production of UV cross-linked heat-shrinkable tubing.

[0025] (1) Weigh 100 kg of low-density polyethylene, 50 kg of ethylene-methyl acrylate copolymer, 5 kg of 1-hydroxy-1-methylethyl phenyl ketone, 1 kg of sodium phosphate, 1 kg of melamine, and nano-active Calcium carbonate (particle size is 25 nm) 0.5 kg, magnesium stearate 0.5 kg and dibutyl hydroxytoluene 0.5 kg, and mixed uniformly to obtain a premix;

[0026] (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;

[0027] (3) The tubing obtained in step (2) was subjected to a strength of 500 mW / cm 2 And irradiate for 30 seconds under an ultraviolet light source with a wavelength of 200 nm to obtain a cross-linked pipe;

[0028] (4) Heat and expand the cross-linked tubing obtained in step (3), and quench and form it to obtain a UV cross-linked heat-shrinkable tube.

Embodiment 2

[0029] Embodiment 2: Production of UV cross-linked heat-shrinkable tube.

[0030] (1) Weigh 100 kg of low-density polyethylene, 80 kg of ethylene-methyl acrylate copolymer, 10 kg of 1-hydroxy-1-methylethyl phenyl ketone, 5 kg of sodium phosphate, 5 kg of melamine, and nano-active Calcium carbonate (particle size is 100 nm) 5 kg, magnesium stearate 5 kg and dibutyl hydroxytoluene 5 kg, and mixed uniformly to obtain a 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 tubing obtained in step (2) was subjected to a strength of 2000 mW / cm 2 And irradiate for 10 seconds under an ultraviolet light source with a wavelength of 200 nm to obtain a cross-linked pipe;

[0033] (4) Heat and expand the cross-linked tubing obtained in step (3), and quench and form it to obtain a UV cross-linked heat-shrinkable tube.

Embodiment 3

[0034] Embodiment 3: Production of UV cross-linked heat-shrinkable tube.

[0035] (1) Weigh 100 kg of polyethylene, 55 kg of ethylene-methyl acrylate copolymer, 6 kg of 1-hydroxy-1-methylethyl phenyl ketone, 2 kg of sodium phosphate, 2 kg of melamine, and nano-active calcium carbonate (particle size is 30 nm) 1 kg, magnesium stearate 1 kg and dibutyl hydroxytoluene 1 kg, and mix uniformly to obtain a premix;

[0036] (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;

[0037] (3) The tubing obtained in step (2) was subjected to a strength of 500 mW / cm 2 And irradiate for 30 seconds under an ultraviolet light source with a wavelength of 200 nm to obtain a cross-linked pipe;

[0038] (4) Heat and expand the cross-linked tubing obtained in step (3), and quench and form it to obtain a UV cross-linked heat-shrinkable tube.

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Abstract

The invention discloses a heat shrinkable tube and a preparation method thereof. Specifically, the heat shrinkable tube provided by the invention is prepared from the following components in parts by weight: 100 parts of polyethylene, 50 to 80 parts of an olefin-acrylate copolymer, 5 to 10 parts of a photoinitiator, 1 to 5 parts of a phosphate-based flame retardant, 1 to 5 parts of a melamine-based flame retardant, 0.5 to 5 parts of nano active calcium carbonate, 0.5 to 5 parts of a lubricant and 0.5 to 5 parts of an antioxidant. The heat shrinkable tube provided by the invention does not contain dangerous substances including mercury, cadmium, hexavalent chromium and the like, and meets instruction requirements of RoHS (Restriction of Hazardous Substances) of European Union; the heat shrinkable tube does not contain halogen and red phosphorus and does not generate toxic substances after being combusted, so that the heat shrinkable tube has no harm to the environment and human bodies; the heat shrinkable tube has very good heat resistance, insulativity and flame resistance and relatively ideal mechanical strength, and has properties which are the same as those of the heat shrinkable tube prepared through radiation cross linking.

Description

technical field [0001] The invention belongs to the technical field of heat-shrinkable tubes, and relates to a heat-shrinkable tube and a preparation method thereof. Background technique [0002] Cross-linked heat-shrinkable materials are widely used in wire and cable equipment to play the role of insulation, protection or marking of wires and cables. At present, most of the cross-linked heat-shrinkable sleeves are irradiated by radiation cross-linking method, but the investment cost of related equipment is relatively high, and the operation and maintenance are also relatively complicated. The use of ultraviolet light (UV) as the radiation source has the advantages of low equipment investment, simple process, convenient operation and maintenance, etc. The heat-shrinkable tube produced by UV cross-linking technology has the same characteristics as the heat-shrinkable tube produced by radiation cross-linking method. characteristics. Contents of the invention [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/02C08K3/32C08K5/3492C08K3/26C08K5/098C08J3/28C08J3/24
CPCC08L23/06C08J3/246C08J3/28C08J2323/06C08J2423/08C08K2201/003C08K2201/011C08L2201/02C08L2201/08C08L2203/18C08L2207/062C08L2207/066C08L2312/06C08L23/0869C08K13/02C08K2003/324C08K5/34922C08K2003/265C08K5/098
Inventor 周宏敏
Owner 苏州泰斯拓伟机电设备有限公司
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