Preparation method of polytetrafluoroethylene thread seal tape film for communication cable

A technology of polytetrafluoroethylene and communication cables, which is applied in the field of communication insulation materials, can solve the problems of large signal attenuation, large dielectric constant, and poor temperature resistance, and achieve reduced attenuation and loss, low dielectric constant, and good moisture resistance. Effect

Active Publication Date: 2010-02-10
四会市生料带厂有限公司
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Problems solved by technology

However, the above three forms still have the following disadvantages: 1. There are many dielectric materials used for solid insulation, and the dielectric constant is large. Especially, the loss of the signal in the medium is proportional to the frequency. When the frequency is high, the signal attenuation is very large. 2. The disadvantage of air insulation is that the withstand voltage is low, and because the outer conductor usually adopts a tubular structure, the flexibility is poor; 3. The foamed polyethylene used in s

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  • Preparation method of polytetrafluoroethylene thread seal tape film for communication cable
  • Preparation method of polytetrafluoroethylene thread seal tape film for communication cable
  • Preparation method of polytetrafluoroethylene thread seal tape film for communication cable

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Embodiment Construction

[0024] The method for manufacturing the polytetrafluoroethylene raw film for communication cables of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] Method for manufacturing polytetrafluoroethylene raw material film for communication cables, such as figure 1 As shown, the production steps it includes are as follows:

[0026] 1. Ingredients and pretreatment:

[0027] (1) In view of polytetrafluoroethylene dispersion resin having multiple grades, the polytetrafluoroethylene dispersion resin of different grades has different molecular weight distributions and other characteristics, the present invention selects and uses molecular weight at 300-500 ten thousand by screening, particle diameter is 480-520um, standard relative density is 2.15-2.18, water content ≤ 0.03%, tensile strength ≥ 34Mpa, elongation at break ≥ 400% polytetrafluoroethylene dispersion resin; the function of the polytetrafluoroethylen...

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Abstract

The invention discloses a preparation method of polytetrafluoroethylene thread seal tape film for communication cable, comprising the following steps: proportioning and pretreating, performing, bulldozing, rolling, drawing, orienting, second drawing and forming and cutting and winding. The polytetrafluoroethylene thread seal tape film prepared by the invention has good comprehensive performance and particularly has very low dielectric constant and dielectric loss angle tangent; the thread seal tape film can not be affect by the changes of frequency and temperature so as to effectively reduce the attenuation and loss of transmission and greatly improve the transmission rate; in addition, the prepared communication cable has good softness and humidity resistance and can be used for a long time at -65 DEG C to 260 DEG C.

Description

technical field [0001] The invention relates to a low-loss communication insulating material, in particular to a method for manufacturing a polytetrafluoroethylene raw material film for communication cables. Background technique [0002] The insulation layer of communication cables is an important part of the cable structure. Considering the requirements of attenuation, transmission power, and withstand voltage, the current insulation layer can be divided into three forms: solid insulation, air insulation and semi-air insulation in terms of structure. However, the above three forms still have the following disadvantages: 1. There are many dielectric materials used for solid insulation, and the dielectric constant is large. Especially, the loss of the signal in the medium is proportional to the frequency. When the frequency is high, the signal attenuation is very large. 2. The disadvantage of air insulation is that the withstand voltage is low, and because the outer conducto...

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Application Information

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IPC IPC(8): B29C69/02B29B13/04B29B13/10B29B7/00B29B13/00B29C47/20B29C47/92B29C43/24B29C43/58B29C55/02B29C71/02B29K27/18B29L7/00
Inventor 曾燕飞曾亮李水文
Owner 四会市生料带厂有限公司
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