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90-DEG C low-shrinkage ultraviolet-proof medium-density polyethylene sheath material and preparation method thereof

A density polyethylene, anti-ultraviolet technology, applied in the direction of plastic/resin/wax insulators, organic insulators, electrical components, etc., can solve problems such as safety accidents and quality accidents, high suspension voltage, grounding copper shell pull-off, etc. The effect of good appearance quality, excellent weather resistance and easy promotion

Active Publication Date: 2020-03-06
JIANGSU SHANGSHANG CABLE GRP NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shrinkage of the sheath will lead to the pull-off of the grounding copper shell or copper strip, resulting in a higher floating voltage, which will eventually cause safety accidents and quality accidents

Method used

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  • 90-DEG C low-shrinkage ultraviolet-proof medium-density polyethylene sheath material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Formula: 40 parts of metallocene polyethylene (Exxon, 1327MA, pellets), 40 parts of bimodal polyethylene (Sabic, B5403, pellets), 20 parts of linear low-density polyethylene (Zhenhai Petrochemical, 7042, pellets), lubricated Agent (a mixture of polyethylene wax (Changzhou Kesaicheng, polyethylene wax 2420, powder) and zinc stearate with a mass ratio of 2:1) 1.8 parts, color masterbatch (Shanghai Wujiang new material, 50-RD-3245 , pellets) 1 part, 0.6 part of antioxidant (the mixture of antioxidant 1010 and antioxidant 168 mass ratio is 3:2), ultraviolet light stabilizer (benzotriazole type and benzophenone type mass ratio 5:4 mixture) 0.3 parts.

[0024] The sheath material is prepared according to the following steps: 1) Separately weigh the pellets and powder in the raw materials, mix them evenly, and then put them all into a plastic high-speed mixer to mix to obtain a mixture; 2) put the obtained mixture into Put it into the barrel of a twin-screw extruder, extrude ...

Embodiment 2

[0026] Formula: 30 parts of metallocene polyethylene (Exxon, 4009, pellets), 30 parts of bimodal polyethylene (Sabic, B5822, pellets), 40 parts of linear low-density polyethylene (Zhenhai Petrochemical, 7042, pellets), lubricated Agent (a mixture of polyethylene wax (Changzhou Kesaicheng, polyethylene wax 2420, powder) and zinc stearate with a mass ratio of 1:1) 1.6 parts, color masterbatch (Shanghai Wujiang new material, 50-RD-3245 , pellets) 1 part, 0.6 part of antioxidant (the mixture of antioxidant 1010 and antioxidant 168 mass ratio is 3:4), ultraviolet light stabilizer (benzotriazole type and benzophenone type mass ratio 5:3 mixture) 0.4 parts.

[0027] The preparation of the sheath material refers to Example 1.

Embodiment 3

[0029] Formula: 30 parts of metallocene polyethylene (Exxon, 3505, pellets), 40 parts of bimodal polyethylene (Sabic, 5822, pellets), 30 parts of linear low-density polyethylene (Sabic, 320NT, pellets), lubricant (a mixture of polyethylene wax (Changzhou Kesaicheng, polyethylene wax 2420, powder) and zinc stearate with a mass ratio of 1:1) 1.6 parts, color masterbatch (Shanghai Wujiang New Material, 50-RD-3245, Granules) 1 part, 0.8 part of antioxidant (the mixture of antioxidant 1010 and antioxidant 168 mass ratio is 3:4), ultraviolet light stabilizer (benzotriazole type and benzophenone type mass ratio 5 :3 mixture) 0.4 parts.

[0030] The preparation of the sheath material refers to Example 1.

[0031] The sheath material prepared in the above-mentioned embodiments is extruded through a single-screw extruder to produce cables of corresponding specifications. The specific production equipment and processes are as follows:

[0032] 1) Single-screw extruder model EXT-150-50D...

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Abstract

The invention discloses a 90-DEG C low-shrinkage ultraviolet-proof medium-density polyethylene sheath material and a preparation method thereof. The 90-DEG C low-shrinkage ultraviolet-proof medium-density polyethylene sheath material comprises the raw material components in parts by mass: 25-40 parts of metallocene polyethylene, 30-50 parts of bimodal polyethylene, 10-40 parts of linear low density polyethylene, 1-2 parts of a lubricant, 1 part of a color master batch, 0.4-0.8 part of an antioxidant and 0.3-0.6 part of an ultraviolet stabilizer. The 90-DEG C low-shrinkage ultraviolet-proof medium-density polyethylene sheath material has excellent mechanical properties and electrical properties, excellent weather resistance and good environmental stress cracking resistance; a finished cabledoes not fade obviously after being exposed to the sun for a long time in an open air environment, the shrinkage is small in an environment with large temperature difference, and the apparent qualityof a sheath is good under high-speed extrusion in the production process; the preparation method is simple and easy to operate and popularize.

Description

technical field [0001] The invention relates to a 90°C low-shrinkage anti-ultraviolet medium-density polyethylene sheath material and a preparation method thereof, belonging to the field of low-shrinkage sheath materials. Background technique [0002] With the rapid development of the national economy, the requirements for energy transmission are getting higher and higher. As a supporting industry for power transmission, the power cable industry plays an important role and position in the process of energy transmission. Generally, power cables use polyvinyl chloride or polyethylene material as the outer sheath. Due to the advantages of environmental protection, light weight, good mechanical properties, excellent electrical properties and low temperature resistance, polyethylene materials are widely used in the power cable industry. . [0003] The outer sheath of the power cable is mainly used as a protective layer to protect the cable from the natural environment and extern...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K5/098C08K5/134C08K5/526H01B3/44
CPCC08L23/06C08L23/0815H01B3/441C08L2207/06C08L2205/025C08L2205/035C08L2201/08C08L2203/202C08K5/098C08K5/1345C08K5/526
Inventor 姚鑫刘雄军
Owner JIANGSU SHANGSHANG CABLE GRP NEW MATERIAL CO LTD
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