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Polyimide film externally coated with metal conductive layer and preparation method thereof

A polyimide film, metal conductive layer technology, applied in metal layered products, cable/conductor manufacturing, conductive layers on insulating carriers, etc., can solve the problem that PI insulating layers cannot withstand decomposition, etc. Industrialized production, low production cost, improved electrical conductivity

Inactive Publication Date: 2010-01-20
陈贤斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure and manufacturing method of the polyimide film coated with a metal conductive layer basically follow the previous technology. Above 700°C, the PI insulating layer cannot withstand and decomposes

Method used

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  • Polyimide film externally coated with metal conductive layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Polyamic acid with a molecular weight of 250,000 to 350,000 (solid content 15wt%) synthesized from pyromellitic anhydride and diamine is coated on the On a 146mm stainless steel ball, after obtaining a uniform adhesive layer, put it into a heating furnace for imidization. The initial temperature is 60°C, and the temperature is gradually raised to 250°C. After cooling, a polyimide insulating layer is obtained, and the thickness is measured to be 80 microns. , no breakdown under DC voltage 10.8kv (insulation layer immersed in water test), with 15wt% solid content of polyamic acid 100 grams, add 4.5 grams of graphite, 4.5 grams of carbon black, 0.5 grams of silane coupling agent A1100, 3.5 grams Solid nickel silver agent JSW, 5 grams of conductivity enhancer 522, 3 grams of SA910 leveling agent, 6 grams of polyvinylpyrrolidone, 30 grams of solvent dimethylacetamide, mixed and ground evenly to form an intermediate adhesive layer coating, sprayed on the insulation The surfa...

Embodiment 2

[0066] Coat the same polyamic acid with the method of dipping with implementing 1 on On a 77mm stainless steel ball, put it into a heating furnace for imidization after a uniform adhesive layer is obtained. The initial temperature is 60°C, and the temperature is gradually raised to 250°C. After cooling, an insulating layer with a thickness of 80 microns is obtained. After a DC voltage of 10.5 The kv withstand voltage test does not break down. Then use the same two-way adhesive as in Example 1 to spray on the surface of the insulating layer, with a thickness of 5 microns. After natural drying, Ag and Ni ultrafine powder are evenly coated on the bonding layer in a closed powder sprayer, shaking Fall and blow lightly into adhered metal powder, move into a heating furnace at a heating rate of 5°C / min, and finally solidify and form at 340°C, take it out to cool, and polish it with a cloth wheel to obtain a smooth, bright metal conductive layer, thickness 15 microns, for measuring...

Embodiment 3

[0068] Coat the same polyamic acid with the method of dipping with implementing 1 on On a 146mm stainless steel ball, put it into a heating furnace for imidization after a uniform adhesive layer is obtained. The initial temperature is 60°C, and the temperature is gradually raised to 250°C. After cooling, an insulating layer with a thickness of 20 microns is obtained. After a DC voltage of 10.5 The kv withstand voltage test does not break down.

[0069] Use 85.3 grams of polyamic acid with a solid content of 15 wt%, add 4.5 grams of graphite, 4.5 grams of carbon black, 1.3 grams of silane coupling agent A1100, 3.6 grams of solid nickel silver agent JSW, 5.7 grams of conductivity enhancer 522, and 3.6 grams of SA910 fluid Leveling agent, 3.6 grams of polyvinylpyrrolidone, 26 grams of solvent dimethylacetamide, mixed and ground evenly to form an intermediate adhesive layer coating, sprayed on the surface of the insulating layer, with a thickness of 5 microns, and obtained an int...

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Abstract

The invention relates to a polyimide film externally coated with a metal conductive layer and a preparation method thereof. The polyimide film is provided with a polyimide insulating layer and a metal conductive layer and is characterized in that a middle bonding layer playing a role of bidirectional bonding is arranged between the polyimide insulating layer and the metal conductive layer. The middle bonding layer comprises the following components in percentage by weight: 35-50 percent of polyimide as a main component, 3-12.5 percent of graphite, 3-12.5 percent of conductive black carbon, 0.6-6 percent of silane coupling agent, 2-10 percent of nickel-silver curing agent, 4-16 percent of conductive paint conductivity promoting agent and 2-10 percent of leveling agent. The preparation method comprises the steps of coating, drying, curing for molding, polishing, and the like. The polyimide film externally coated with the metal conductive layer can be widely applied to the high-tech field of protective devices with special purposes, and the like of electronics, electrical appliances, electromagnetic shielding, electromagnetic radiation and power transmission and transformation projects.

Description

technical field [0001] The invention relates to technical fields such as lightning protection and electromagnetic shielding, and specifically relates to a polyimide film covered with a metal conductive layer and a manufacturing method thereof. The polyimide film covered with a metal conductive layer can be widely used It is used in high-tech fields, such as special-purpose electronic appliances, electromagnetic shielding, electromagnetic radiation and protection devices for power transmission and transformation projects. Background technique [0002] In recent years, people have studied various insulating materials and their outer covering ultra-low resistance metal conductive layers. From the various demanding requirements such as adhesion, high temperature resistance, radiation resistance, large weather resistance, and exposure resistance, polyamide Imine is one of the very few materials available, and polyimide is the best insulating material of this type in terms of cost...

Claims

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Application Information

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IPC IPC(8): H01B5/14H01B13/00C09J179/08H05K9/00B32B15/08B32B7/12
Inventor 蒋鸣
Owner 陈贤斌
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