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High-efficient low-cost electromagnetic shielding film and manufacturing method thereof

A technology of electromagnetic shielding film and manufacturing method, applied in the fields of magnetic field/electric field shielding, chemical instruments and methods, electrical components, etc., can solve the problems of high cost of electromagnetic shielding film, insufficient product market competitiveness, affecting the price of electronic products, etc. , to meet the special use requirements, shorten the processing process, and achieve the effect of excellent conduction performance

Inactive Publication Date: 2015-09-02
SUZHOU CHENGBANG DALI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the manufacturing process of the electromagnetic shielding film material in the prior art is complicated, and a large amount of precious metal silver will be used, resulting in high cost of the electromagnetic shielding film, which eventually affects the price of electronic products and makes the market competitiveness of the product insufficient.

Method used

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  • High-efficient low-cost electromagnetic shielding film and manufacturing method thereof
  • High-efficient low-cost electromagnetic shielding film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The "four-layer electromagnetic shielding film" of this embodiment has the characteristics of low cost and high efficiency, and its structure is as follows figure 1 As shown, it includes: a carrier film layer 1, an ink layer 2 coated on the carrier film layer 1, and a conductive adhesive layer 3 coated on the ink layer 2, and the conductive adhesive layer 3 is also thermally pressed. A layer of release film 4 is combined.

[0040] The carrier film layer 1 is a high-temperature-resistant carrier, which is a high-molecular polymer film. It mainly acts as a lamination protection and a carrier for the ink layer 2. Specifically, it can be one or more modifications of PET, PEN, PI, PBT and PPS films. Thin film with a thickness of 25-200μm.

[0041] The ink layer 2 can be one or a mixture of epoxy resin, polyacrylic resin, rubber elastomer, phenolic resin, polyester resin and polyurethane resin, with a thickness of 5-50 μm. At the same time, the ink layer 2 also contains fun...

Embodiment 2

[0060] The electromagnetic shielding film of this embodiment has a three-layer structure. Compared with Embodiment 1, the difference is that the release film layer 4 is removed, which can further reduce product costs without affecting product performance. The manufacturing method includes the following step:

[0061] C-1. Use a micro-adhesive wheel to remove foreign particles on the inner surface of the carrier film roll;

[0062] C-2. Coating the prepared ink layer 2 on the inner surface of the carrier film roll;

[0063] C-3. The ink layer 2 is dried in a coating oven. The temperature of the coating oven is set at 80-180°C, and the line speed is set at 5-30m / min;

[0064] C-4. Then coat a layer of conductive adhesive layer 3 on the surface of the ink layer 2, and dry it in a coating oven. The temperature of the coating oven is set at 30-100°C, and the line speed is set at 5-30m / min;

[0065] C-5, harvest volume.

[0066] In summary, the electromagnetic shielding film of t...

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Abstract

The invention discloses a high-efficient low-cost electromagnetic shielding film and a manufacturing method thereof. The electromagnetic shielding film comprises: a support film layer, an ink layer coating the support film layer, and an electrical conductive adhesive layer coating the ink layer. The electromagnetic shielding film allows a simple and easy manufacture process, and can be directly produced through a conventional FPC manufacturing procedure, such as drilling and punching. The manufacturing procedure is greatly shortened; the production efficiency is improved; and the production cost is reduced. The electrical conductive adhesive layer permits the electromagnetic shielding film of excellent conductive performance, and the conductive resistance may reach 0.3 omega in an electrode of 1 cm and a bore with a diameter of 0.5 mm. The ink layer possesses excellent insulativity and frame resistance and can reach the UL94VTM-0 effect. Furthermore, rubber elastomer can be added in each layer and enables the whole electromagnetic shielding film to possess relatively high flexibility, and a special use requirement of a flexible circuit board material is satisfied.

Description

technical field [0001] The invention relates to a high-efficiency and low-cost electromagnetic shielding film and a manufacturing method of the electromagnetic shielding film, belonging to the technical field of electromagnetic shielding. Background technique [0002] In order to avoid the threat of electromagnetic radiation to human health and avoid signal interference caused by electromagnetic radiation, the requirements for electromagnetic shielding in electronic products are getting higher and higher. Therefore, electromagnetic shielding film materials are widely used on the lines of flexible circuit boards. However, the manufacturing process of the electromagnetic shielding film material in the prior art is complex, and a large amount of precious metal silver is used, resulting in high cost of the electromagnetic shielding film, which ultimately affects the price of electronic products and makes the products less competitive in the market. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00B32B27/08
Inventor 董青山须田健作
Owner SUZHOU CHENGBANG DALI MATERIAL TECH
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