Thermoplastic polyester elastomer heat-shrinkable casing tube for automobile wire harness as well as preparation method and application of heat-shrinkable casing tube

A thermoplastic polyester and automotive wiring harness technology, applied in the field of heat-shrinkable sleeves, can solve the problems of mechanical properties, poor oil resistance, acid and alkali corrosion resistance, high cost of fluoropolymer materials, poor mechanical strength of silicone rubber, etc., and achieve low cost. Environmental protection, excellent mechanical properties, strong high temperature diesel effect

Active Publication Date: 2014-04-16
广州凯恒科塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyolefin heat-shrinkable materials are low in cost and easy to process and shape, but have poor mechanical properties, oil resistance, acid and alkali corrosion resistance, and low temperature resistance. In addition, a large amount of flame retardants must be added to achieve a certain flame retardant level.
Fluoropolymer heat-shrinkable materials have excellent properties, but the high cost makes them only suitable for high-end applications, and the mechanical strength of silicone rubber is poor
For example, patent application CN103044744A discloses a method for preparing polyolefin oil-resistant heat-shrinkable tubes. The tubes obtained by this method have high hardness and poor flexibility
In the patent CN101956876A, the heat-shrinkable tube prepared with fluoroelastomer and fluororesin as the base material has high oil resistance and solvent resistance, but the cost of fluoropolymer material is too high
Patent application CN101993589A discloses a heat-shrinkable tube with silicone rubber and polyolefin as the resin substrate, and its mechanical properties are worse than those of pure polyolefin-based heat-shrinkable tubes

Method used

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  • Thermoplastic polyester elastomer heat-shrinkable casing tube for automobile wire harness as well as preparation method and application of heat-shrinkable casing tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Take 50 kg of thermoplastic polyester elastomer (TPEE, Shore hardness 46D, Japan Toyobo, brand name Pelprene X-146D, the same as the following examples), fluorine rubber (U.S. DuPont, brand name VITON A-HV, the following implementation The same as for example) 30kg, black masterbatch (Cabot of the United States, the brand is PLASBLAK UN2014, the same as the following examples) 5kg, antimony trioxide 5kg, magnesium hydroxide 50kg, flame retardant synergist (brand is FRP-33, Guangzhou Qi Original Chemical Co., Ltd., the following examples are the same) 3kg, hydrotalcite 0.5kg, zinc stearate 0.5kg, 0.1kg antioxidant 1010, 0.15kg antioxidant TH-24, 0.2kg antioxidant 445, 0.05kg antioxidant Oxygen agent 697 and polyester graft modified silicone additive (Shanghai Daile, brand name is TEGOMER H-Si6440P, the following examples are the same) 0.5kg were sequentially put into the mixing room of the single-screw internal mixing granulator at 180°C Banbury for 15 minutes, then ...

Embodiment 2

[0050] (1) Take 80kg of thermoplastic polyester elastomer X-146D, 60kg of fluororubber VITON A-HV, 15kg of black mother PLASBLAK UN2014, 30kg of antimony trioxide, 15kg of magnesium hydroxide, 15kg of aluminum hydroxide, and 10kg of melamine cyanurate , 15kg flame retardant synergist FRP-33, hydrotalcite 2kg, zinc stearate 1kg, calcium stearate 1kg, 1kg antioxidant 1010, 1.2kg antioxidant TH-24, 1.2kg antioxidant 445, 0.6 kg of antioxidant 697 and 2kg of silicone additive TEGOMER H-Si6440P were sequentially put into the mixing chamber of the single-screw banburying granulator, banburying at 180°C for 15min, and then adding 2.5kg of triallyl isocyanate at 180°C After banburying for 5 minutes, the above mixture is automatically fed to the granulation part of the single-screw banbury granulator, extruded, drawn, air-cooled and pelletized at 130-220°C;

[0051] (2) Extrude the above-mentioned granulated pellets into a tube with a screw extruder equipped with a die and a mandrel at...

Embodiment 3

[0054] (1) Take 60kg of thermoplastic polyester elastomer X-146D, 50kg of fluororubber VITON A-HV, 10kg of black mother PLASBLAK UN2014, 30kg of antimony trioxide, 10kg of flame retardant synergist FRP-33, 2kg of hydrotalcite, stearin Zinc acid 1kg, 0.4kg antioxidant 1010, 0.7kg antioxidant 618, 0.7kg antioxidant 445, 0.2kg antioxidant 697 and 1kg silicone additive TEGOMER H-Si6440P are put into the single-screw banburying granulator in sequence In the mixing room of the mixing chamber, banbury at 180°C for 15min, then add 1.5kg of pentaerythritol tetraacrylate and banbury at 180°C for 5min, and automatically feed the above mixture to the granulation part of the single-screw banburying granulator, at 130°C Extrusion, wire drawing, air cooling, pelletizing at ~220°C;

[0055] (2) Extrude the above-mentioned pelletized pellets into a tube with a screw extruder equipped with a die and a mandrel at 130-220°C, and then irradiate with an electron accelerator. After cross-linking, t...

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Abstract

The invention discloses a thermoplastic polyester elastomer heat-shrinkable casing tube for an automobile wire harness as well as a preparation method and an application of the heat-shrinkable casing tube. The heat-shrinkable casing tube comprises the following components in parts by weight: 50-80 parts of a thermoplastic polyester elastomer, 30-60 parts of halogen-containing resin, 5-15 parts of black masterbatch, 5-30 parts of diantimony trioxide, 0-100 parts of a flame retardant, 3-15 parts of a flame retardant synergist, 1-4 parts of a thermal stabilizer, 0.5-4 parts of an antioxidant, 0.5-2 parts of a silicone aid and 1-2.5 parts of a sensitizer. The preparation method comprises the following steps: mixing the thermoplastic polyester elastomer, the halogen-containing resin, the black masterbatch, diantimony trioxide, the flame retardant, the flame retardant synergist, the thermal stabilizer, the antioxidant and the silicone aid, adding the sensitizer, mixing, granulating, extruding to form a tube, performing irradiation crosslinking, stretching by expanding, shaping by cooling, flattening, and marking. The heat-shrinkable casing tube has the advantages of relatively low price, high-efficiency flame retardance, excellent mechanical property, low pollution, high-temperature oil resistance, acid-base corrosion resistance and capability of being applied in a severe working environment.

Description

technical field [0001] The invention relates to a heat-shrinkable sleeve, in particular to a thermoplastic polyester elastomer heat-shrinkable sleeve for automobile wire harnesses, a preparation method and application thereof. Background technique [0002] The resin base material of the heat shrinkable sleeve is mostly made of polyolefin resin, fluoropolymer, silicone rubber, and other rubber materials. The comprehensive requirements for heat shrinkable tubing for automotive wiring harnesses are highly efficient flame retardant, good mechanical properties, high temperature oil resistance, heat and humidity resistance, soft texture, and moderate cost. Polyolefin heat-shrinkable materials are low in cost and easy to process and shape, but their mechanical properties, oil resistance, acid and alkali corrosion resistance are poor, and their temperature resistance level is low. In addition, a large amount of flame retardants must be added to achieve a certain level of flame retar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L27/12C08K13/02C08K3/22C08K3/34C08K5/098C08K5/3492C08K5/103C08K3/38B29C47/92B29C48/92
CPCB29C48/90B29C48/04B29C48/91B29C48/911B29C48/92B29C2948/92704B29C2948/92895
Inventor 黄雷胡晖杨云飞冉祥海王飚郑凯航
Owner 广州凯恒科塑有限公司
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