135 DEG C irradiation-crosslinked polyolefin heat-shrinkable tube

A technology of cross-linked polyolefin and heat-shrinkable tubes, which is applied in the field of irradiated cross-linked polyolefin heat-shrinkable tubes at 135°C, which can solve the problems of poor oil resistance, high equipment cost requirements, and non-stacking shrinkage, etc., to achieve extrusion processing Improved performance, improved surface quality, and reduced melt pressure

Inactive Publication Date: 2015-02-25
长园科技集团股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the heat-shrinkable tubes used in the market are 125°C grade heat-shrinkable tubes. According to the standards of UL224 and the US military standard MIL-DTL-23053-5, the aging can only meet the detection of 168 hours at 158°C. At the same time, the heat-shrinkable tubes shrink During use, if they are stacked together to shrink at the same time, there will be adhesion to each other and it will not be easy to pull apart. To avoid this phenomenon, do not stack and shrink each other during the shrinking process, which will affect production efficiency.
[0003] With the continuous extension of the application field, the diversification of application conditions and occasions, new requirements are constantly put forward for the heat For materials with a temperature above 135°C, fluoroplastics and silicone rubbers are mostly used at present. Fluoroplastics are not only expensive in raw materials, but also require relatively high equipment costs. Silicone rubbers are poor in oil resistance, so it is expected to replace them with inexpensive polyolefin materials.

Method used

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  • 135 DEG C irradiation-crosslinked polyolefin heat-shrinkable tube
  • 135 DEG C irradiation-crosslinked polyolefin heat-shrinkable tube
  • 135 DEG C irradiation-crosslinked polyolefin heat-shrinkable tube

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preparation example Construction

[0046] The preparation method of the above-mentioned 135 ℃ radiation cross-linked polyolefin heat-shrinkable tube comprises the following steps:

[0047] Step 1: Take the following components in parts by weight, 100 parts of olefin polymer; 5 parts of grafting agent; 30-50 parts of filling flame retardant; 20-50 parts of main flame retardant; flame retardant synergist 10-25 parts; 2-5 parts of antioxidant; 2-5 parts of light stabilizer; 2-5 parts of lubricant; 2-5 parts of organic fluorine masterbatch; 1-5 parts of silicone oil; Mother 5 copies.

[0048] Step 2: Stir the components in step 1 with a high-speed mixer, and produce a masterbatch at 100-160°C through an internal mixer or twin-screw.

[0049] Step 3: Process the masterbatch prepared in step 2 through a single-screw extruder, and shape and extrude a pipe under the condition of 90-160°C.

[0050] Step 4: The tube extruded in step 3 is irradiated in an electron accelerator, and the irradiation dose is 5-15 Mrad.

[00...

preparation Embodiment 1

[0053] Take the following components:

[0054] 100 parts of olefin polymers (specifically, 30Kg of ethylene methyl acrylate (EMA Akema 18MA03) and 70Kg of ethylene vinyl acetate (EVA));

[0055] 5 parts of grafting agent (concretely get maleic anhydride modified terpolymer 5Kg);

[0056] Fill with 50 parts of flame retardant (specifically take magnesium hydroxide 20Kg, aluminum hydroxide 30Kg);

[0057] 20 parts of main flame retardant (concretely get 20Kg of decabromodiphenylethane flame retardant);

[0058] 10 parts of flame retardant synergist (specifically take 10Kg of antimony trioxide);

[0059] 5 parts of antioxidant (specifically take antioxidant 10763Kg, antioxidant DNP 2Kg);

[0060] 2 parts of light stabilizer (specifically take 2Kg of tris(1,2,2,6,6-pentamethylpiperidinyl) phosphite (brand: GW540))

[0061] 4 parts of lubricant (specifically take 2Kg of zinc stearate and 2Kg of silicone);

[0062] 2 parts of organic fluorine masterbatch (specifically take 2Kg ...

preparation Embodiment 2

[0071] Take the following components:

[0072] 100 parts of olefinic polymer (specifically take 80Kg of ethylene methyl acrylate (EMA Akema 18MA03) and 20Kg of ethylene octene copolymer resin (POE));

[0073] 5 parts of grafting agent (concretely get maleic anhydride modified copolymer 5Kg);

[0074] Fill with 30 parts of flame retardant (specifically take 30Kg of magnesium hydroxide);

[0075] 50 parts of main flame retardant (specifically take 40Kg of decabromodiphenylethane, 10Kg of decabromodiphenyl ether);

[0076] 25 parts of flame retardant synergist (specifically 5Kg of zinc borate and 20Kg of antimony trioxide);

[0077] 2 parts of antioxidant (specifically take antioxidant 10101.5Kg, antioxidant Ky4050.5Kg);

[0078] 2 parts of light stabilizer (specifically take 2Kg of tris(1,2,2,6,6-pentamethylpiperidinyl) phosphite (brand: GW540))

[0079] 2 parts of lubricant (specifically take 2Kg of lubricant zinc stearate);

[0080] 5 parts of organic fluorine masterbatch...

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Abstract

The invention relates to a 135 DEG C irradiation-crosslinked polyolefin heat-shrinkable tube which is composed of the following components in parts by weight: 100 parts of olefin polymer, 5 parts of grafting agent, 30-50 parts of filling flame retardant, 20-50 parts of main flame retardant, 10-25 parts of flame-retardant synergistic agent, 2-5 parts of antioxidant, 2-5 parts of light stabilizer, 2-5 parts of lubricant, 2-5 parts of organic fluorine master batch, 1-5 parts of silicon oil, 3 parts of crosslinking agent and 5 parts of color master batch. The heat-shrinkable tube produced according to the formula above completely satisfies the requirements in UL242 and Grade 135 DEG C in MIL-DTL-23053-5, does not have the adhesion phenomenon in the shrinkage process, and can be widely used in the fields of locomotives, ships, aerospace, nuclear power, war industry and the like.

Description

technical field [0001] The invention relates to a heat-shrinkable tube of polyolefin that satisfies the level of 135°C irradiation crosslinking. There is no mutual adhesion phenomenon during the heating and shrinking process, and can be widely used in the fields of locomotives, ships, aerospace, nuclear power, military industry and the like. Background technique [0002] At present, most of the heat-shrinkable tubes used in the market are 125°C grade heat-shrinkable tubes. According to the standards of UL224 and the US military standard MIL-DTL-23053-5, the aging can only meet the detection of 168 hours at 158°C. At the same time, the heat-shrinkable tubes shrink During use, if they are stacked together to shrink at the same time, there will be adhesion to each other and it will not be easy to pull apart. To avoid this phenomenon, do not stack and shrink each other during the shrinking process, which will affect production efficiency. [0003] With the continuous extension o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L27/20C08L83/04C08L83/06C08L51/06C08K13/02C08K3/22C08K5/03C08K5/06C08K5/13C08K3/38C08K3/28C08J3/24
CPCC08L23/0853C08J3/24C08J3/28C08J2323/08C08L23/0869C08L2201/02C08L2203/18C08L2205/02C08L2205/035C08L51/00C08L27/20C08L83/04C08K13/02C08K2003/2224C08K2003/2227C08K3/2279C08K5/03C08K5/1345C08K5/524C08K5/18C08K5/103C08L23/0815C08K5/06C08K3/38C08K5/13C08K2003/2255
Inventor 谢世平鲁雪莲李可涛祁峰鹿德福苏俊平骆伍欧美玲
Owner 长园科技集团股份有限公司
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