Outdoor anti-aging dual-wall heat-shrinkable tube and preparation method thereof

A heat-shrinkable sleeve and anti-aging technology, which is applied in the field of materials, can solve the problems of discoloration, poor self-repairability, and brittleness, and achieve the effects of improving service life, avoiding safety accidents, and excellent flame retardancy

Inactive Publication Date: 2015-01-07
东莞三联热缩材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long-term use in the open air and exposure to the sun and rain with a large temperature difference between day and night, a series of problems are likely to occur, especially the ultraviolet rays in the sun have a negative effect on solar water heater pipe coatings such as conventional sleeves or stretch films. Degradation hazards, ultraviolet rays can accelerate the aging of the heat-shrinkable sleeve, which is manifested by the sheath material of the double-walled heat-shrinkable sleeve falling off, discolored, and brittle, and eventually loses the function of the double-walled heat-shrinkable sleeve
On the other hand, solar pipe wraps such as conventional sleeves or stretch films have poor self-healing properties under normal temperature and pressure conditions, and have no self-healing function

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First, take the heat-shrinkable layer raw materials in the following parts by weight:

[0034] Polyethylene 30 parts,

[0035] 10 parts of magnesium hydroxide,

[0036] 1 part red phosphorus,

[0037] Light stabilizer 0.1 part,

[0038] Antioxidant 1010 0.5 parts,

[0039] Zinc stearate 1 part,

[0040] 2 parts of masterbatch,

[0041] 0.4 parts of silicone rubber.

[0042] Add the above mixture into a closed internal mixer operating at high speed for mixing, and the temperature is controlled within the range of 100-140°C. Preferably, during the granulation process of the internal mixer, the number of turning over of the mixture is controlled within 3-8 times, the temperature is controlled within the range of 95-150°C, and the components of the material have good dispersion and high uniformity. The mixture obtained by kneading is extruded with a single-screw extruder at 100-150° C., pelletized, and air-cooled to form the outer heat-shrinkable layer of the double-...

Embodiment 2

[0052] First, take the heat-shrinkable layer raw materials in the following parts by weight:

[0053] 35 parts of ethylene-vinyl acetate copolymer,

[0054] 20 parts of aluminum hydroxide,

[0055] Microcapsule red phosphorus 10 parts,

[0056] 1 part light stabilizer,

[0057] Antioxidant 1010 1 part,

[0058] Zinc stearate 1.5 parts,

[0059] 1.5 parts of masterbatch,

[0060] 1 part silicone rubber;

[0061] in ， The melt index of the ethylene-vinyl acetate copolymer is 1-5g / 10min (190°C), and the weight content of vinyl acetate is 17%-20%.

[0062]Add the above mixture into a closed internal mixer operating at high speed for mixing, and the temperature is controlled within the range of 100-140°C. Preferably, during the granulation process of the internal mixer, the number of turning over of the mixture is controlled within 3-8 times, the temperature is controlled within the range of 95-150°C, and the components of the material have good dispersion and high uniformi...

Embodiment 3

[0072] First, take the heat-shrinkable layer raw materials in the following parts by weight:

[0073] 40 parts of ethylene-vinyl acetate copolymer,

[0074] 25 parts of magnesium hydroxide,

[0075] Microcapsule red phosphorus 10 parts,

[0076] 5 parts of light stabilizer,

[0077] Antioxidant 1010 1.5 parts,

[0078] Zinc stearate 0.5 parts,

[0079] 2 parts of masterbatch,

[0080] 1 part silicone rubber;

[0081] Wherein, the melt index of the ethylene-vinyl acetate copolymer is 1-5g / 10min (190°C), and the weight content of vinyl acetate is 17%-20%.

[0082] Add the above mixture into a closed internal mixer operating at high speed for mixing, and the temperature is controlled within the range of 100-140°C. Preferably, during the granulation process of the internal mixer, the number of turning over of the mixture is controlled within 3-8 times, the temperature is controlled within the range of 95-150°C, and the components of the material have good dispersion and hig...

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Abstract

The invention discloses an outdoor anti-aging dual-wall heat-shrinkable tube and a preparation method thereof. The dual-wall heat-shrinkable tube comprises a hot melt adhesive located on the inner layer and a heat shrinkage layer which is located on the outer layer and takes polyolefin as a main material. The dual-wall heat-shrinkable tube comprises components in parts by weight as follows: 10-50 parts of the hot melt adhesive, 30-60 parts of a polyethylene and / or ethylene-vinyl acetate copolymer, 10-40 parts of magnesium hydroxide and / or aluminum hydroxide and / or modified magnesium hydroxide and / or MCA (melamine cyanuric acid), 1-30 parts of a flame retardant, 0.1-5 parts of a light stabilizer and / or an ultraviolet absorber and 0-5 parts of additives, namely, an antioxidant, a lubricant, a colorant and a surface treating agent. The dual-wall heat-shrinkable tube has excellent properties such as the flame retardant property, the insulation property, the temperature resistance and the like; meanwhile, the heat shrinkage layer on the outer layer has anti-aging and ultraviolet-resistant functions; the hot melt adhesive on the inner layer has a self-repair function after special treatment; the preparation process is safe and environment-friendly.

Description

Technical field [0001] The invention involves the field of materials, especially for an outdoor anti -aging double -wall heat shrinkage tube and their preparation methods. Background technique [0002] The double -wall thermal retractable tube is a high -end product in the heat shrinking tube. The outer layer uses a high -quality cross -linking polyolefin material, and a high -intensity composite material made from the inner hot -melt glue composite processing.The outer layer has the advantages of insulation, anti -corrosion, wear resistance, and the inner layers have the advantages of low melting point, waterproof seal and mechanical strain buffer performance. [0003] When the thermal shrinking tube is applied to outdoor, the double wall thermal retractable tube has certain advantages.Taking the solar water heater pipeline as an example, the existing solar water heater pipeline is covered with plastic or stretch membrane, and the two -wall tube is used to cover the solar water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/08B32B27/32B32B27/30B32B27/06B32B27/08C08L23/06C08L23/08C08K13/02C08K3/02C08K3/22C08K5/098C08K5/3492B29C47/06B29C71/04F16L9/18
CPCB32B1/08B29C48/21B32B27/06B32B27/08B32B27/30B32B27/32B32B33/00B32B2307/206B32B2307/306B32B2307/3065B32B2307/71F16L9/18
Inventor 徐光周陈鹏
Owner 东莞三联热缩材料有限公司
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