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A kind of Teflon semiconductor thin film for electric wire and cable and preparation method thereof

A technology of wire and cable and Teflon, which is applied in the field of Teflon semiconductor film for wire and cable and its preparation, which can solve the problems of poor flame retardancy and achieve good effect, good flame retardancy and high quality

Active Publication Date: 2017-01-11
FOSHAN HUIFU POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a Teflon semiconductor film for wires and cables, which has good flame retardancy while having semiconductor characteristics, and overcomes the poor flame retardancy of PE and TPE wires and cables defects, and can reach ultra-thin thickness

Method used

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  • A kind of Teflon semiconductor thin film for electric wire and cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of Teflon semiconducting film for electric wire and cable is prepared according to the following method by polytetrafluoroethylene 98wt% and carbon black 2wt%:

[0037]Take polytetrafluoroethylene and carbon black, the average particle size of polytetrafluoroethylene is 20-35 μm, and the particle size of carbon black is required to be 800-1000 mesh. Using a high-speed mixer, it is mixed evenly through four processes of primary mixing, premixing, high-speed mixing, and sieving, and the mixing process control time is 0.5 to 3 minutes.

[0038] Weigh the well-mixed mixture powder accurately, and add the weighed raw materials evenly into the mold. Put the mold into the middle of the upper and lower platens of the press, calculate the pressure (the pressure calculation formula is: gauge pressure F = product cross-sectional area S / cylinder piston area s × P unit pressure, P = 250 ~ 300kgf), and set the pressure at the same time Program, the pressing speed is general...

Embodiment 2

[0042] The Teflon semiconductor film for wires and cables in this embodiment is made of 92 wt% polytetrafluoroethylene and 8 wt% carbon black, the thickness of the film is 0.03mm, and the preparation operation is the same as that of Example 1.

Embodiment 3

[0044] The Teflon semiconductor film for wires and cables in this embodiment is made of 95 wt% polytetrafluoroethylene and 5 wt% carbon black, the thickness of the film is 0.05 mm, and the preparation operation is the same as that of Example 1.

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Abstract

The present invention provides a wire and cable teflon semiconductor thin film which is prepared from 92-98 wt % of polytetrafluoroethylene and 2-8 wt % of carbon black by the following method: taking the polytetrafluoroethylene and the carbon black, mixing evenly; pressing for moulding; sintering at high temperature; mechanically processing for film-forming, rolling and orientating. By optimum composition ratio, choosing of appropriate particle size, and use of a certain way for mixing, the problem of ununiform mixing and dispersing of the carbon black in the polytetrafluoroethylene powder can be solved, the product is high in quality, and good in effect, has good semiconductor characteristics and good flame retardant, can be used for wire and cable for balancing electric field and playing the effect of flame retardance, solves the defects of the worse fire retardant performance of PE and TPE wires and cables, is more competitive in price than imported product, is ultra-thin in thickness, fills the domestic blank, and breaks the common situation that black-filled teflon films on market in the prior art are basically used in other fields in which functional requirements are not high.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene film, in particular to a Teflon semiconductor film for electric wires and cables and a preparation method thereof. Background technique [0002] Semiconductor materials mainly play the role of equalizing the electric field in wires and cables. The most common semiconductor materials are PE, TPE, etc., but PE and TPE wires and cables have poor flame retardancy. With the development of the market and people's awareness of environmental protection and safety With the improvement of performance requirements, the existing PE and TPE wires and cables cannot meet the requirements. [0003] Teflon (chemical name polytetrafluoroethylene, English abbreviation PFFE) has the characteristics of high and low temperature resistance, non-combustibility, etc. It is a good insulating and flame-retardant material. At present, many domestic enterprises have the ability to produce Teflon film. The preparation method and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08K3/04B29C43/58B29C67/04H01B3/44
CPCB29C43/58B29C67/04B29C2043/5808B29C2043/5816B29C2043/5825C08J5/18C08J2327/18C08K3/04C08K2201/001C08K2201/003C08L2201/02C08L2203/16C08L2203/202H01B3/445C08L27/18
Inventor 黄贵军
Owner FOSHAN HUIFU POLYMER MATERIALS CO LTD
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