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Preparation method of fluorine layer-containing polyimide composite material and equipment for method

A technology of composite materials and polyimide, which is applied in the field of preparation of polyimide composite materials with fluorine-containing layer, can solve the problems of high melting point, poor melting processing performance of fluorine materials, slow speed, etc., and achieve accurate thickness control and equipment High precision, overcome the effect of low speed

Active Publication Date: 2015-06-24
苏州凯姆勒绝缘材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fluorine materials generally have a high melting point and a short melting range; a high melting point makes it difficult to melt the fluorine material, and a short melting range leads to poor fluidity of the fluorine material. Once the melting point is passed, the viscosity of the fluorine material drops rapidly; In the prior art, the preparation of fluorine-containing layer polyimide composite materials adopts the dip coating method, that is, the suspension of various fluorine materials is coated on the surface of the polyimide film, and the surface is leveled by gravity, and then dried or sintered to obtain products; however, the thickness uniformity of the products prepared by this method is poor, and appearance defects such as bubbles, particles, flow glue marks, etc. cannot be avoided. At the same time, it is difficult to produce ultra-thin fluorine layer (less than 0.005mm) and ultra-thick layer (above 0.15mm) material
[0004] With the development of science and technology, the amount of polyimide composite materials with fluorine-containing layer is increasing day by day, and the use environment is becoming more and more harsh. However, when preparing polyimide composite materials with fluorine-containing layer by coating method, gravity leveling 1. A large amount of water needs to be dried, so the speed is very slow (generally 0.8-3m / min), and the production efficiency is low; at the same time, a large amount of emulsifiers, defoamers and other additives are added to the suspension of fluorine materials, which is difficult to process. Composite materials and later use will bring a lot of trouble, and a large number of additives will destroy the internal structure of the fluorine layer material and the fluorine layer material and polyimide, which will affect the fluorine-containing layer polyimide composite material to a certain extent. performance
[0005] At present, the fluorine-containing layer polyimide composite materials prepared by the coating method can no longer meet the performance requirements of this type of product in the industry. Imine Composite

Method used

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  • Preparation method of fluorine layer-containing polyimide composite material and equipment for method
  • Preparation method of fluorine layer-containing polyimide composite material and equipment for method
  • Preparation method of fluorine layer-containing polyimide composite material and equipment for method

Examples

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Embodiment 1

[0044] Example 1 Equipment for preparing fluorine-containing layer polyimide composite materials

[0045] Such as figure 1 As shown, the equipment of the present invention consists of an unwinding device 1 , a deviation correcting device 2 , a corona treatment device 3 , an extrusion casting system 4 , a molding system 5 , a static elimination device 6 , and a winding device 7 . The unwinding device includes a drive motor, a frequency converter, and a tension controller; the rewinding device includes a drive motor, a frequency converter, a tension controller, and a meter counter. Unwinding device and winding device can control the pulling speed of polyimide film. The extrusion casting system includes a stocker 41 , a screw extruder 42 , and an extrusion die 43 ; the molding system includes a cooling device 51 , a shaping device 52 and a sintering device 53 . Correspondingly set some transmission rollers at each position.

[0046] attached figure 2 It is a schematic struct...

Embodiment 2

[0050] Example 2 Preparation of polyimide composite material with fluorine-containing layer

[0051] Adopt the equipment of embodiment one

[0052] First, 60Kg polyimide film with a width of 550mm and a thickness of 0.025mm is drawn according to a specific route; 50Kg of dry polyperfluoroethylene propylene particles are added to the stocker for use; the width of the extrusion die is adjusted to 520 mm ; The temperature of the cooling system is 50°C, the temperature of the shaping system is 205°C, and the temperature of the sintering system is 350°C.

[0053] Then the polyimide film is unwinded at a speed of 40m / min through an unwinding device, a deviation correction device, and corona treatment, and the extrusion rate of the screw extruder is gradually adjusted to 0.65Kg / min, and the polyimide film is passed through When extruding the casting system, the polyperfluoroethylene propylene melt is extruded from the extrusion die and compounded onto the polyimide film;

[0054] F...

Embodiment 3

[0063] Example 3 Preparation of polyimide composite material with fluorine-containing layer

[0064] Adopt the equipment of embodiment one

[0065] First, 60Kg polyimide film with a width of 550mm and a thickness of 0.025mm is pulled according to a specific route; 40Kg of dry polytetrafluoroethylene particles are added to the stocker for use; the width of the extrusion die is adjusted to 520 mm; The cooling system temperature is 50°C, the setting system temperature is 260°C, and the sintering system temperature is 380°C.

[0066] Then the polyimide film is unwinded at a speed of 50m / min through an unwinding device, a deviation correction device, and corona treatment, and the extrusion rate of the screw extruder is gradually adjusted to 0.29Kg / min, and the polyimide film is passed through When extruding the casting system, the PTFE melt is extruded from the extrusion die and compounded onto the polyimide film.

[0067] Finally, the polyimide film compounded with polytetrafluo...

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Abstract

The invention discloses a preparation method of a fluorine layer-containing polyimide composite material and equipment for the method. The preparation method comprises the following steps: a polyimide thin film subjected to surface treatment passes through devices such as an unreeling system, a correcting device, and a corona treatment device, and passes through an extruding pouring system filled with a fluorine-containing material at a speed of 0.5-100m, and the fluorine-containing material is compounded to the polyimide thin film; and the polyimide thin film compounded by the fluorine-containing material enters a main molding system to further control the thickness of the fluorine-containing material and the fluorine-containing material is sintered on the surface of the polyimide thin film, so that the fluorine layer-containing polyimide thin film is prepared. According to the preparation method disclosed by the invention, multilayer compounding and single / double-sided compounding are realized, and composite materials with different thicknesses of fluorine layers can be prepared, the process is concise, and the precision and the efficiency are high.

Description

technical field [0001] The invention belongs to the field of polyimide materials, and in particular relates to a preparation method of a fluorine-containing layer polyimide composite material and equipment used in the method. Background technique [0002] The fluorine-containing layer polyimide composite material is formed by laminating one or more layers of fluorine-containing materials on one or both sides of a polyimide film, and is formed through main molding. This composite material combines the advantages of polyimide and fluorine-containing materials. It has high / low temperature resistance, radiation resistance, weather resistance, and can melt and self-adhesive at 200-370°C. Its excellent electrical properties make it widely used in wires, cables, petroleum industry, aerospace and other fields. [0003] Fluorine materials generally have a high melting point and a short melting range; a high melting point makes it difficult to melt the fluorine material, and a short ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/50B29C70/54
CPCB29C69/00
Inventor 陈亮陆建明赵广昊钟华春程爱民赵继辉许建军刘晓恒赵继英
Owner 苏州凯姆勒绝缘材料有限公司
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