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Method for preparing PTFE (Polytetrafluoroethylene) varnished cloth, PTFE varnished cloth prepared by using same and metal foil covered laminated board

A technology of PTFE and metal foil, which is applied in the field of PTFE varnished cloth and metal foil-clad laminates to prepare PTFE varnished cloth, which can solve the problems affecting production efficiency and limited resin layer thickness, so as to reduce the number of gluing times, uniform thickness and improve production efficiency Effect

Active Publication Date: 2017-11-24
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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  • Method for preparing PTFE (Polytetrafluoroethylene) varnished cloth, PTFE varnished cloth prepared by using same and metal foil covered laminated board
  • Method for preparing PTFE (Polytetrafluoroethylene) varnished cloth, PTFE varnished cloth prepared by using same and metal foil covered laminated board
  • Method for preparing PTFE (Polytetrafluoroethylene) varnished cloth, PTFE varnished cloth prepared by using same and metal foil covered laminated board

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Embodiment 1

[0040] In the present embodiment, the PTFE varnished cloth is prepared by the following method, and specifically comprises the following steps:

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

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

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

Embodiment 2

[0045] In the present embodiment, the PTFE varnished cloth is prepared by the following method, and specifically comprises the following steps:

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

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

[0048] (3) Using such as figure 1 The horizontal coating machine shown is coated with PTFE glue on the other side of the PTFE varnished cloth obtained in step (2), and the coating thickness is set to 0.2 mm, dried and sintered to obtain a PTFE varnished cloth coated on both sides, which is coated on both sides. The thickness (including ...

Embodiment 3

[0050] In the present embodiment, the PTFE varnished cloth is prepared by the following method, and specifically comprises the following steps:

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

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

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

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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 varnished cloth, PTFE varnished cloth and metal-clad laminate prepared by the method. Background technique [0002] Since polytetrafluoroethylene (PTFE) was commercialized by DuPont in 1945, due to the unique physical and chemical properties of this material, people have been continuously exploring the application of this material in various fields, among which the excellent dielectric properties of PTFE materials 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 copper clad laminate is made of electronic grade fiberglass cloth impregnated with PTFE emulsion, and then sintered by "vertical gluing machine" to obtain PTFE varnished cloth, and then covered with copper foil on both sides, and ...

Claims

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Application Information

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Patent Type & Authority Applications(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