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A kind of electromagnetic wave shielding film material and preparation method thereof

A shielding film and electromagnetic wave technology, applied in the fields of magnetic/electric field shielding, electrical components, conductive adhesives, etc., can solve problems such as difficulty in maintaining the shielding function and easy breakage of the film, and achieve excellent electromagnetic wave shielding performance and excellent bonding performance Effect

Active Publication Date: 2020-02-07
SHENZHEN LICHANGSHI ADHESIVE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the electromagnetic wave shielding film is designed not to have an interlayer metal layer, and the conductive adhesive is prepared from anisotropic (Anisotropic) to isotropic (Isotropic), so that it can give the conductive adhesive layer Shielding function, but when bent for a long time, the film formed by metal particles is easy to break, making it difficult to maintain the shielding function

Method used

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  • A kind of electromagnetic wave shielding film material and preparation method thereof

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Effect test

Embodiment 1

[0038] An electromagnetic wave shielding film material is characterized in that a layer of 5.5 micron matte black resin is coated on one side of the copper foil, and a layer of 15 micron anisotropic conductive adhesive layer is coated on the other side, and the outer layer of the matte black resin is coated with One layer of PET protective layer, plus a layer of PET release film on the outer layer of the anisotropic conductive adhesive layer; the frosted black resin is fully processed by adding 2.5 micron dummy paddles to the oily black resin with a solid content of 25%. Prepared by stirring until the viscosity is 25-26 seconds; the shown anisotropic conductive adhesive layer includes acrylic pressure-sensitive adhesive, isocyanate hardener, melamine hardener, and conductive copper powder, wherein the molecular weight of the acrylic pressure-sensitive adhesive is 750,000, solid The content is 40%, and the conductive copper powder is CoO with a particle size of 6.5 microns and m...

Embodiment 2

[0044] An electromagnetic wave shielding film material, characterized in that a layer of 5-micron matte black resin is coated on one side of the copper foil, and a layer of 12-micron anisotropic conductive adhesive layer is coated on the other side, and the outer layer of the matte black resin is coated with One layer of PET protective layer, plus a layer of PET release film on the outer layer of the anisotropic conductive adhesive layer; the frosted black resin is fully processed by adding 2.5 micron dummy paddles to the oily black resin with a solid content of 25%. Prepared by stirring until the viscosity is 25-26 seconds; the shown anisotropic conductive adhesive layer includes acrylic pressure-sensitive adhesive, isocyanate hardener, melamine hardener, conductive copper powder, wherein the molecular weight of the acrylic pressure-sensitive adhesive is 800,000, solid The content is 40%, and the conductive copper powder is CoO with a particle size of 5.5 microns and more than...

Embodiment 3

[0050] An electromagnetic wave shielding film material, which is characterized in that a layer of 6-micron matte black resin is coated on one side of the copper foil, and a layer of 10-micron anisotropic conductive adhesive layer is coated on the other side, and the outer layer of the matte black resin is coated with One layer of PET protective layer, plus a layer of PET release film on the outer layer of the anisotropic conductive adhesive layer; the frosted black resin is fully prepared by adding 3 micron dummy paddles to the oily black resin with a solid content of 25%. Prepared by stirring until the viscosity is 25-26 seconds; the shown anisotropic conductive adhesive layer includes acrylic pressure-sensitive adhesive, isocyanate hardener, melamine hardener, and conductive copper powder, wherein the molecular weight of the acrylic pressure-sensitive adhesive is 700,000, solid The content is 40%, and the conductive copper powder is CoO with a particle size of 7 microns or mo...

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Abstract

The invention provides an electromagnetic wave shielding film material, which is characterized in that a layer of frosted black resin of 5-6 microns is coated on one surface of copper foil, and an anisotropic conductive adhesive layer of 10-12 microns is coated on the other surface; a PET protective layer is added on the outer layer of the frosted black resin; and a layer of PET release film is added on the outer layer of the anisotropic conductive adhesive layer. The invention provides an electromagnetic wave shielding film material and a preparation method thereof; the light shielding property and the excellent electromagnetic wave shielding performance are achieved; and the ultra-thin structure of the material and the excellent bonding performance with various substrates are realized.

Description

technical field [0001] The invention relates to an electromagnetic wave shielding film material and a preparation method thereof. Background technique [0002] In recent years, electromagnetic wave interference (EMI) has been increasing along with the increase in the use of various electrical equipment or electronic equipment. In addition to being the cause of malfunction or interference of electronic and electrical equipment, EMI has also been blamed for causing damage to the health of operators of these equipment. Therefore, the intensity of electromagnetic waves emitted by electronic and electrical equipment is required to be controlled within the range specified by standards or regulations. [0003] In the work against EMI, it is necessary to shield electromagnetic waves. For this purpose, it is self-evident that the property that electromagnetic waves do not pass through metal can be utilized. For example, a method in which a frame is made of metal or a high-conducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00C09J7/28C09J7/40C09J7/38C09J9/02C09J133/04
CPCC09J7/28C09J7/38C09J7/40C09J9/02C09J133/04C09J2301/122C09J2301/302C09J2467/005H05K9/0088
Inventor 王益刚贺凌黄伟
Owner SHENZHEN LICHANGSHI ADHESIVE PROD
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