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High-performance polytetrafluoroethylene film, and manufacturing method of microwave substrate thereof

A technology of polytetrafluoroethylene and its manufacturing method, which is applied in the field of communication, can solve the problems of easy tearing of film, thick texture of PTFE varnished cloth, poor appearance, etc., and achieve the problems of poor adhesion, stable dielectric constant, and reduced water absorption Effect

Active Publication Date: 2020-02-04
珠海国能新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of PTFE varnished cloth has a thick texture (about 100um~210um in thickness) and poor appearance. Because the diaphragm contains glass fiber cloth, the isotropy is not uniform, and it cannot meet the high-end use requirements of high-performance ultra-thin high-frequency boards.
[0005] For the manufacture of PTFE film, there is currently another way to use "turning", that is, use PTFE resin to make a solid columnar compaction, and then use a tool to turn the PTFE film. The thickness of this film is generally 30um to 100um. However, this method It is impossible to add a large amount of inorganic fillers, and high-performance PTFE films cannot be produced, and the maximum width is only 0.3m, because after adding a large amount of inorganic fillers, the toughness of the film decreases and it is easy to tear, so it cannot be turned and manufactured
[0006] At present, no domestic manufacturer has been able to produce high-performance ultra-thin PTFE films and microwave substrates

Method used

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  • High-performance polytetrafluoroethylene film, and manufacturing method of microwave substrate thereof
  • High-performance polytetrafluoroethylene film, and manufacturing method of microwave substrate thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0033] Embodiment 1-5 Preparation of PTFE film and microwave substrate thereof

[0034] Embodiment 1-5 prepares the formula of PTFE film as follows:

[0035] components Example 1 Example 2 Example 3 Example 4 Example 5 Glass fiber / g 3 4 15 24 49 Cationic polyurethane / g 6 3 12 20 14 Nano silicon nitride / g 1 3 9 8 7 PTFE resin / g 30 45 50 60 90

[0036] Embodiment 1-5 prepares the method for PTFE film as follows:

[0037] S1. Put nano-silicon nitride, glass fiber, and cationic polyurethane filler into PTFE resin, disperse it by ball milling, and keep the obtained glue for more than 8 hours;

[0038] S2. Take the heat-resistant tempered glass equipped with measuring rollers that can continuously move left and right. The heat-resistant tempered glass has a thickness of 0.5 cm, a roughness of Ra 0.020 um, a width of 1000 mm, and a length of 1000 mm. Place the heat-resistant tempered glass horizontally, and determine t...

Embodiment 6-9

[0044] Embodiment 6-9 Preparation of PTFE film and microwave substrate thereof

[0045] The preparation method refers to Example 3, the difference is that the number of PTFE film sheets is different when preparing the PTFE film microwave substrate, and the number of sheets in Examples 6-9 is 2, 3, 5, and 7 respectively.

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Abstract

The invention belongs to the field of communication, and particularly relates to a high-performance polytetrafluoroethylene (PTFE) film, and a manufacturing method of a microwave substrate thereof. The high-performance PTFE film comprises 10-70 parts of a filler and 30-90 parts of polytetrafluoroethylene resin, and the filler comprises nanometer silicon nitride, a glass fiber and a cationic polyurethane, and a mass ratio of the glass fiber to the cationic polyurethane to the nanometer silicon nitride is (3-7):(2-6):(1-4). An ultrathin high-performance PTFE film is prepared by a self-made ultrathin PTFE film device, and is used for preparing the microwave substrate. The obtained PTFE film has a low water absorption rate and a good bonding performance, and the microwave substrate has excellent thermodynamic and electrical properties.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a high-performance polytetrafluoroethylene film and a manufacturing method of a microwave substrate thereof. 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. From the 1970s to the 1980s, the United States developed different types of PTFE high-frequency boards for military communication electronic circuit substrates, including glass fiber cloth reinforced PTFE high-frequency boards (DK2.2-3.0), ceramic filled PTFE high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L75/04C08K7/14C08K3/34C08J5/18B32B15/20B32B15/085B32B27/06B32B27/32B32B27/20B32B33/00
CPCB32B15/085B32B15/20B32B27/06B32B27/20B32B27/322B32B2307/204B32B2307/302B32B2307/306B32B2457/08C08J5/18C08J2327/18C08J2475/04C08K3/34C08K7/14C08K2201/011
Inventor 葛凯刘庆辉钟光维
Owner 珠海国能新材料股份有限公司
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