阅读说明：本技术 一种永久抗静电高温耐油热收缩套管及其制备方法 (Permanent antistatic high-temperature oil-resistant heat-shrinkable sleeve and preparation method thereof ) 是由 邓成 夏春亮 冯雪雁 康树峰 于 2019-08-15 设计创作，主要内容包括：本发明公开一种永久抗静电高温耐油热收缩套管及其制备方法,其制备材料按重量计,包括以下组份：聚乙烯40-60份,乙烯-辛烯共聚物弹性体5-30份,相容剂1-10份,永久抗静电剂10-40份,抗氧剂0.5-3份,分散剂润滑剂0.1-5份,色母1-5份,敏化剂0.5-3份。本发明永久抗静电高温耐油热收缩套管不仅能够承受135℃高温环境,而且能够承受住介质油的侵蚀,其永久抗静电性不受环境湿度(RH)的影响,具有较好的力学强度、低温柔性和耐老化性能。(The invention discloses a permanent antistatic high-temperature oil-resistant heat-shrinkable sleeve and a preparation method thereof, wherein the preparation material comprises the following components in parts by weight: 40-60 parts of polyethylene, 5-30 parts of ethylene-octene copolymer elastomer, 1-10 parts of compatilizer, 10-40 parts of permanent antistatic agent, 0.5-3 parts of antioxidant, 0.1-5 parts of dispersant lubricant, 1-5 parts of color master and 0.5-3 parts of sensitizer. The permanent antistatic high-temperature oil-resistant heat shrinkable sleeve can not only bear a high-temperature environment of 135 ℃, but also bear the corrosion of medium oil, has the permanent antistatic property which is not influenced by the environmental humidity (RH), and has better mechanical strength, low-temperature flexibility and aging resistance.)

1. The permanent antistatic high-temperature oil-resistant heat-shrinkable sleeve is characterized in that a preparation material of the heat-shrinkable sleeve comprises the following components in parts by weight: 40-60 parts of polyethylene, 5-30 parts of ethylene-octene copolymer elastomer, 1-10 parts of compatilizer, 10-40 parts of permanent antistatic agent, 0.5-3 parts of antioxidant, 0.1-5 parts of dispersant lubricant, 0-5 parts of color master batch and 0.5-3 parts of sensitizer.

2. The permanent antistatic high temperature oil resistant heat shrinkable sleeve as claimed in claim 1, wherein the polyethylene is 50-60 parts, the ethylene-octene copolymer elastomer is 5-20 parts, the compatilizer is 1-5 parts, the permanent antistatic agent is 15-35 parts, the antioxidant is 0.5-1.5 parts, the dispersing lubricant is 0.5-2.0 parts, the black masterbatch is 2-4 parts, and the sensitizer is 1-2 parts.

3. The permanent antistatic high temperature oil resistant heat shrinkable sleeve as claimed in claim 2, wherein the polyethylene is 54 parts, ethylene-octene copolymer elastomer 20 parts, compatibilizer 2 parts, permanent antistatic agent 20 parts, antioxidant 0.5 part, dispersing lubricant 0.5 part, black master 2.5 parts, and sensitizer 0.5 part.

4. The permanently antistatic high temperature oil resistant heat shrinkable sleeve according to claim 1, wherein a mixture of polyethylene and ethylene-octene copolymer elastomer is used as a matrix, and MI is in the range of 1-10 g/min.

5. The permanently antistatic high temperature oil resistant heat shrinkable sleeve according to claim 1, wherein the permanently antistatic agent is a thermoplastic elastomer derived inherently dissipative polymer, a polyolefin derived dissipative polymer or a polyolefin filled carbon fiber reinforcement.

6. The permanently antistatic high temperature oil resistant heat shrinkable sleeve as claimed in claim 1, wherein the compatibilizer is one of maleic acid grafted polyolefin, acrylic acid grafted polyolefin resin or silane coupling agent Si 69.

7. The permanent antistatic high temperature oil resistant heat shrinkable sleeve as claimed in claim 1, wherein the antioxidant is poly hindered phenols or aromatic amines, or is compounded by hindered phenols and phosphites.

8. The permanently antistatic high temperature oil resistant heat shrinkable sleeve according to claim 1, wherein said dispersing lubricant is polyethylene wax, oleamide or stearic acid.

9. The permanent antistatic high temperature oil resistant heat shrinkable sleeve of claim 1, wherein the black masterbatch is a black masterbatch using polyethylene or ethylene-vinyl acetate copolymer as a carrier.

10. The permanently antistatic high temperature oil resistant heat shrinkable sleeve according to claim 1, wherein the sensitizer is trimethylolpropane tri (methacrylate) TMPTMA or triallyl isocyanurate TAIC.

11. A method for preparing a permanent antistatic high temperature oil resistant heat shrinkable sleeve as claimed in any one of claims 1 to 10, comprising the steps of:

(1) a material making step: preparing the polyethylene, the ethylene-octene copolymer elastomer, the compatilizer, the permanent antistatic agent, the antioxidant, the dispersing lubricant, the black masterbatch and the sensitizer according to any one of claims 1-10 in a corresponding proportion, pouring the mixture into a high-speed mixer for uniform mixing, and extruding and granulating the uniformly mixed mixture at the temperature of 120-130 ℃ through a double-screw mixing extruder to obtain master batches;

(2) an extrusion molding step: extruding the master batch prepared in the material preparing step into a sleeve through a single-screw extruder;

(3) an irradiation step: irradiating the sleeve under the irradiation dose of 30KGy-100 KGy;

(4) expanding and forming: heating the irradiated sleeve in oil at 140-160 deg.c, vacuum expanding and sizing to obtain permanent antistatic high temperature oil resistant heat shrinkable sleeve.

Technical Field

The invention mainly relates to the technical field of high temperature, oil medium and permanent antistatic heat shrinkage, in particular to a permanent antistatic high temperature oil resistant heat shrinkage sleeve and a preparation method thereof.

Background

The heat shrinkable material, also called high molecular shape memory material, is a high molecular polymer which is irradiated by high energy ray and breaks the original random or linear arranged molecular chain to form active free radicals, then recombination polymerization is carried out between the active free radicals to form the high molecular polymer with a cross-linked stereo net structure, and the cross-linked polymer has a memory effect and can be restored to an initial state under a specific condition. The traditional heat shrinkable sleeve cannot bear a high-temperature environment, is easy to dissolve in medium oil, is easy to generate static electricity or cannot permanently improve static protection, and cannot provide permanent static protection in the fields of aerospace, automobile wire harnesses, high-precision electronic components and the like.

Therefore, a heat shrinkable sleeve with permanent antistatic property and good oil resistance and temperature resistance is developed, and the blank of the heat shrinkable sleeve on the permanent antistatic property is filled.

Disclosure of Invention

The invention aims to provide a preparation method of a high-temperature oil-resistant permanent antistatic heat-shrinkable tubing.

In order to achieve the purpose, the invention provides a permanent antistatic high-temperature oil-resistant heat-shrinkable sleeve, which is prepared from the following components in parts by weight: 40-60 parts of polyethylene, 5-30 parts of ethylene-octene copolymer elastomer, 1-10 parts of compatilizer, 10-40 parts of permanent antistatic agent, 0.5-3 parts of antioxidant, 0.1-5 parts of dispersant lubricant, 0-5 parts of color master batch and 0.5-3 parts of sensitizer.

Preferably, the polyethylene comprises 50-60 parts of polyethylene, 5-20 parts of ethylene-octene copolymer elastomer, 1-5 parts of compatilizer, 15-35 parts of permanent antistatic agent, 0.5-1.5 parts of antioxidant, 0.5-2.0 parts of dispersing lubricant, 2-4 parts of color master batch and 1-2 parts of sensitizer.

Preferably, the polyethylene comprises 54 parts, 20% of ethylene-octene copolymer elastomer, 2 parts of compatilizer, 20 parts of permanent antistatic agent, 0.5 part of antioxidant, 0.5 part of dispersing lubricant, 2.5 parts of black master batch and 0.5 part of sensitizer.

Preferably, a mixture of polyethylene and ethylene-octene copolymer elastomer is used as the matrix, with MI ranging from 1 to 10 g/min.

Preferably, the permanent antistatic agent is a thermoplastic elastomer-derived inherently dissipative polymer, a polyolefin-derived dissipative polymer, or a polyolefin-filled carbon fiber reinforcement.

Preferably, the compatibilizer is one of maleic acid grafted polyolefin, acrylic acid grafted polyolefin resin, or silane coupling agent Si 69.

Preferably, the antioxidant is multi-hindered phenol or aromatic amine, or is compounded by hindered phenol and phosphite ester.

Preferably, the dispersing lubricant is polyethylene wax, oleamide, or stearic acid.

Preferably, the black master batch is a black master batch taking polyethylene or ethylene-vinyl acetate copolymer as a carrier.

Preferably, the sensitizer is trimethylolpropane tris (methacrylate), TMPTMA or triallyl isocyanurate TAIC.

The invention also provides a preparation method of the permanent antistatic high-temperature oil-resistant heat-shrinkable sleeve, which comprises the following steps:

(1) a material making step: preparing the polyethylene, the ethylene-octene copolymer, the compatilizer, the permanent antistatic agent, the antioxidant, the dispersing lubricant, the color master batch and the sensitizer according to corresponding proportions, pouring the mixture into a high-speed mixer for uniform mixing, and extruding and granulating the uniformly mixed mixture at the temperature of 120-130 ℃ through a double-screw mixing extruder to obtain master batches;

(2) an extrusion molding step: extruding the master batch prepared in the material preparing step into a sleeve through a single-screw extruder;

(3) an irradiation step: irradiating the sleeve under the irradiation dose of 30KGy-100 KGy;

(4) expanding and forming: heating the irradiated sleeve in oil at 140-160 deg.c, vacuum expanding and sizing to obtain permanent antistatic high temperature oil resistant heat shrinkable sleeve.

As mentioned above, the permanent antistatic high-temperature oil-resistant heat shrinkable sleeve can not only bear the high-temperature environment of 135 ℃, but also bear the erosion of the medium oil, has the permanent antistatic property which is not influenced by the environmental humidity (RH), and has better mechanical strength, low-temperature flexibility and aging resistance. The permanent antistatic high-temperature oil-resistant heat-shrinkable sleeve can provide a safety protection effect under the harsh conditions of an electrostatic environment, high temperature or an oil medium.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given in conjunction with the embodiments.

The preparation material of the permanent antistatic high-temperature oil-resistant heat-shrinkable sleeve comprises the following components in parts by weight: 40-60 parts of polyethylene, 5-30 parts of ethylene-octene copolymer elastomer, 1-10 parts of compatilizer, 10-40 parts of permanent antistatic agent, 0.5-3 parts of antioxidant, 0.1-5 parts of dispersant lubricant, 1-5 parts of color master and 0.5-3 parts of sensitizer.

Preferably, the polyethylene comprises 50-60 parts of polyethylene, 5-20 parts of ethylene-octene copolymer elastomer, 1-5 parts of compatilizer, 15-35 parts of permanent antistatic agent, 0.5-1.5 parts of antioxidant, 0.5-2.0 parts of dispersing lubricant, 2-4 parts of black master batch and 1-2 parts of sensitizer.

Preferably, the polyethylene comprises 54 parts, 20 parts of ethylene-octene copolymer elastomer, 2 parts of compatilizer, 20 parts of permanent antistatic agent, 0.5 part of antioxidant, 0.5 part of dispersing lubricant, 2.5 parts of color master batch and 0.5 part of sensitizer.

Preferably, a mixture of polyethylene and ethylene-octene copolymer elastomer is used as the matrix, with MI ranging from 1 to 10 g/min.

Preferably, the permanent antistatic agent is a thermoplastic elastomer-derived inherently dissipative polymer, a polyolefin-derived dissipative polymer, or a polyolefin-filled carbon fiber reinforcement.

Preferably, the compatibilizer is one of maleic acid grafted polyolefin, acrylic acid grafted polyolefin resin, or silane coupling agent Si 69.

Preferably, the antioxidant is multi-hindered phenol or aromatic amine, or is compounded by hindered phenol and phosphite ester.

Preferably, the dispersing lubricant is polyethylene wax, oleamide, or stearic acid.

Preferably, the color master batch is a black color master batch taking polyethylene or ethylene-vinyl acetate copolymer as a carrier.

Preferably, the sensitizer is trimethylolpropane tris (methacrylate), TMPTMA or triallyl isocyanurate TAIC.

The invention relates to a preparation method of a permanent antistatic high-temperature oil-resistant heat shrinkable sleeve, which comprises the following steps:

a material preparation step S1: preparing the polyethylene, the ethylene-octene copolymer, the compatilizer, the permanent antistatic agent, the antioxidant, the dispersing lubricant, the black masterbatch and the sensitizer according to corresponding proportions, pouring the mixture into a high-speed mixer for uniform mixing, and extruding the uniformly mixed mixture through a double-screw mixing extruder at the temperature of 120-130 ℃ to prepare masterbatch;

extrusion molding step S2: extruding the master batch prepared in the step S1 into a sleeve through a single-screw extruder;

irradiation step S3: irradiating the sleeve extruded in the extrusion molding step S2 under the irradiation dose of 60 KGy;

expansion molding step S4: and (4) heating the sleeve irradiated in the irradiation step S3 in oil temperature of 140-160 ℃, and performing vacuum expansion and sizing to obtain the permanent antistatic high-temperature oil-resistant heat-shrinkable sleeve.

The following are exemplified: