Chemical foaming polyethylene composition, preparation method and applications thereof

A chemical foaming, polyethylene technology, used in plastic/resin/wax insulators, organic insulators, electrical components, etc., can solve the problems of low melt tension and high decomposition heat, achieve good mechanical properties, avoid PE materials Too soft, the effect of improving decomposition efficiency

Inactive Publication Date: 2017-07-14
广州敬信高聚物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low melt tension of HDPE and the large dissociation and heat release of ADC itself, when chemically foaming HDPE materials are used to prepare communication cable insulation layers, stable static capacitance in water and high foaming degree (>55%) cannot be achieved at the same time.

Method used

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  • Chemical foaming polyethylene composition, preparation method and applications thereof
  • Chemical foaming polyethylene composition, preparation method and applications thereof
  • Chemical foaming polyethylene composition, preparation method and applications thereof

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preparation example Construction

[0045] The present invention also provides a kind of preparation method of chemical foaming polyethylene composition, comprises the following steps:

[0046] 1) Preparation of composite foaming agent masterbatch: get low-density polyethylene B, foaming agent A, foaming agent B, foaming aid, dispersant, lubricant and antioxidant of formula quantity, join the first mixer Stir in the medium for 3-5 minutes, then add the stirred raw materials into the first reciprocating screw extruder to extrude and granulate to obtain the composite foaming agent masterbatch; wherein, the aspect ratio of the first reciprocating screw extruder For (18-36): 1, the granulation temperature is 120-140°C, and the screw speed is 80-160r / min;

[0047] 2) Preparation of chemically foamed polyethylene composition: take the high-density polyethylene, low-density polyethylene A, coupling agent and the composite foaming agent masterbatch obtained through step 1), add in the second mixer, stir 5-15 minutes, t...

Embodiment 1-5

[0049] The formula of embodiment 1-5 is as shown in the following table, and component is by weight, and unit is part, and in embodiment 1-5, high-density polyethylene is selected as the model that Formosa Plastics produces is 9007 high-density polyethylene, LDPE A is 951-050 low-density polyethylene produced by Maoming Petrochemical Company. The coupling agent is 6040 silane coupling agent produced by Dow Corning. Low-density polyethylene B is produced by Beijing Yanshan Petrochemical Co., Ltd. It is low-density polyethylene of 1C7A, and the foaming agent A is selected from the model ADCA DN-4 foaming powder produced by Jiangsu Thorpe Fine Chemical Co., Ltd., and the foaming agent B is selected from OBSH produced by Hangzhou Haihong Fine Chemical Co., Ltd. The zinc stearate produced by Faji (Chemical) Zhangjiagang Co., Ltd. was selected as the agent, the precipitated silica of Evonik Degussa model Sipernat D10 was selected as the dispersant, and the polyethylene wax produced b...

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Abstract

The present invention discloses a chemical foaming polyethylene composition, a preparation method and applications thereof, wherein the chemical foaming polyethylene composition is prepared from the following components by weight: 70-86 parts of high-density polyethylene, 10-20 parts of low-density polyethylene A, 0.05-0.15 part of a coupling agent, and 4-10 parts of composite foaming agent master batch. According to the present invention, the chemical foaming polyethylene composition retains the high foaming degree of the low-density polyethylene foaming material and the good mechanical property of the high-density polyethylene chemical foaming material so as to obtain the foaming insulation layer having the good electrical property. Another purpose of the present invention is to provide the preparation method of the chemical foaming polyethylene composition, wherein the preparation method is simple and is easy to operate. The present invention further provides uses of the chemical foaming polyethylene composition in preparation of communication cables.

Description

technical field [0001] The invention relates to a polyethylene composition, in particular to a chemically foamed polyethylene composition and its preparation method and application. Background technique [0002] In the process of producing communication cables, solid insulating materials were usually used in the past. With the development of communication technology and the improvement of Internet technology, it is required to achieve large-capacity, high-quality data and image transmission, faster transmission speed and higher transmission frequency. High, while reducing the use of insulating materials. Since the 1990s, the existing high-speed transmission communication cables such as USB3.0, HDMI, VGA, and RGB have used chemically foamed polyethylene compositions instead of solid polyethylene compositions as insulation layers, and the foamed polyethylene insulation layers are relatively Compared with the solid polyethylene insulation layer, it not only has a lower dielect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08K5/5425C08K3/36C08K5/134C08J9/10C08J3/22H01B3/44
CPCC08L23/0815C08J3/226C08J9/101C08J9/103C08J9/105C08J2203/04C08J2203/18C08J2323/08C08J2423/06C08L2203/14C08L2203/202C08L2205/025C08L2205/03C08L2207/066H01B3/441C08L23/06C08K5/5425C08K3/36C08K5/1345
Inventor 洪喜军李立平李天林
Owner 广州敬信高聚物科技有限公司
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