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A method for preparing ptfe varnished cloth, ptfe varnished cloth and metal foil clad laminate prepared by the method

A PTFE and metal-clad technology, which is applied in the direction of metal layered products, chemical instruments and methods, coatings, etc., can solve the problems affecting production efficiency and limited thickness of resin layer, so as to reduce the number of gluing times, uniform thickness, and improve performance Effect

Active Publication Date: 2019-12-17
GUANGDONG SHENGYI SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current vertical gluing machine performs double-sided infiltration and gluing on the glass fiber cloth. Because it is vertical gluing, the varnished cloth is subjected to gravity, and the resin layer on the varnished cloth is prone to apparent sagging after gluing and before drying, making The thickness of each gluing resin layer is limited. When making PTFE copper-clad laminates, the predetermined thickness can only be achieved by stacking multiple sheets, which also greatly affects production efficiency.

Method used

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  • A method for preparing ptfe varnished cloth, ptfe varnished cloth and metal foil clad laminate prepared by the method
  • A method for preparing ptfe varnished cloth, ptfe varnished cloth and metal foil clad laminate prepared by the method
  • A method for preparing ptfe varnished cloth, ptfe varnished cloth and metal foil clad laminate prepared by the method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:

[0041](1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;

[0042] (2) Use such as figure 1 The horizontal coating machine shown in step (1) is coated with PTFE glue on one side of the primary dipped glass fiber cloth obtained in step (1), and the coating thickness is set to 0.100mm, dried and sintered to obtain a 0.154mm single-sided PTFE Linoleum (including glass fiber cloth);

[0043] (3) Use such as figure 1 The horizontal coating machine shown in the step (2) is coated with PTFE glue solution on the other side of the PTFE paint cloth obtained by step (2), and the coating thickness is set to 0.100mm, dried and sintered to obtain the PTFE paint cloth coated with glue on both sides, and its two sides are coated with The thickness (including glass fi...

Embodiment 2

[0045] In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:

[0046] (1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;

[0047] (2) Use such as figure 1 The horizontal coating machine shown in step (1) is coated with PTFE glue on one side of the primary dipped glass fiber cloth obtained in step (1), and the coating thickness is set to 0.2mm, dried and sintered to obtain a single-sided PTFE of 0.254mm Linoleum (including glass fiber cloth);

[0048] (3) Use such as figure 1 The horizontal coating machine shown in the step (2) is coated with PTFE glue solution on the other side of the PTFE paint cloth obtained by step (2), and the coating thickness is set to 0.2mm, dried and sintered to obtain the PTFE paint cloth coated with glue on both sides. The thickness (including glass fiber cloth) is 0.454mm in total.

Embodiment 3

[0050] In the present embodiment, the PTFE paint cloth is prepared by the following method, which specifically includes the following steps:

[0051] (1) 1080 glass fiber cloth is dipped in PTFE glue, and then sintered to obtain a dipped glass cloth, the thickness of which is 0.054mm;

[0052] (2) Use such as figure 1 The horizontal coating machine shown in the step (1) is coated with PTFE glue on one side of the primary dipped glass fiber cloth obtained in step (1), the coating thickness is set to 0.05mm, dried and sintered to obtain a 0.0.104mm single PTFE varnished cloth (including glass fiber cloth);

[0053] (3) Use such as figure 1 The horizontal coating machine shown in the step (2) is coated with PTFE glue solution on the other side of the PTFE paint cloth obtained by step (2), and the coating thickness is set to 0.05mm, dried and sintered to obtain the PTFE paint cloth coated with glue on both sides. The thickness (including glass fiber cloth) is 0.154mm in total. ...

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Abstract

The invention provides a method for preparing PTFE (Polytetrafluoroethylene) varnished cloth, the PTFE varnished cloth prepared by using the method, and a metal foil covered laminated board. The method comprises the following steps: performing primary gum dipping on glass fiber cloth, and sintering so as to obtain primary gum dipped glass fiber cloth; coating one side of the primary gum dipped glass fiber cloth with a PTFE glue by using a horizontal gluing machine, drying, and sintering so as to obtain PTFE varnished cloth of which one side is glued; and coating the other side of the PTFE varnished cloth with the PTFE glue by using the horizontal gluing machine, drying, and sintering, thereby obtaining PTFE varnished cloth of which two sides are glued. By adopting the method, the gluing times can be reduced, varnished cloth of an expected thickness can be made through once horizontal gluing on each side, the gluing thickness is increased, the thickness is uniform, non-uniform thicknesses caused by sagging are avoided, the properties of a copper-clad plate made of the cloth are improved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of copper clad laminate preparation, and relates to a method for preparing PTFE lacquer cloth, the PTFE varnish cloth prepared by the method and a metal foil-clad laminate. Background technique [0002] Since the commercial production of polytetrafluoroethylene (PTFE) by DuPont in 1945, due to the unique physical and chemical properties of this material, people have been continuously developing the application of this material in various fields, among which the excellent dielectric properties of PTFE material are used Performance (low dielectric constant and low dielectric loss) to manufacture copper clad laminates for high frequency applications has been around for many years. [0003] The traditional PTFE CCL is to use electronic grade glass fiber cloth to impregnate PTFE emulsion, and then go through the "vertical gluing machine" for gluing and sintering to obtain PTFE varnish, then cover both sides with copper foi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/00D06N3/04B32B15/20B32B15/14B32B17/06B32B17/02
CPCB32B5/02B32B15/14B32B15/20B32B17/061B32B2255/02B32B2255/26B32B2262/101D06N3/0022D06N3/0088D06N3/047D06N2213/02
Inventor 钟光维苏民社李杜业
Owner GUANGDONG SHENGYI SCI TECH
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