Electromagnetic wave shielding film and highly transparent strong electromagnetic wave shielding tape based on electromagnetic wave shielding film
A technology of electromagnetic wave and shielding film, which is applied in the direction of film/flaky adhesives, adhesives, conductive coatings, etc., which can solve the problem of insufficient transmittance and shielding effectiveness of electromagnetic wave shielding coatings, harsh construction environment of shielded components and conductive fabrics. Expensive and other problems, to achieve excellent fullness, easy to use, and strong shielding effect
Active Publication Date: 2017-05-24
合肥微晶材料科技有限公司
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Problems solved by technology
[0003] The commonly used methods of shielding electromagnetic waves are mainly divided into two categories: one is to use conductive cloth as the base material to make electromagnetic shielding structures, and the conductive cloth used is expensive, low in conductivity, and low in shielding efficiency; The surface of the conductive cover layer is printed to form a layer of conductive ink (such as silver paste ink), and the conductive ink layer fills the opening in the cover layer, thereby electrically connecting to the ground wire of the conductive pattern, and the conductive ink needs to be heated and dried , the operation is complicated, and there are strict requirements on the shielded elements and the construction environment
For example, patent CN101185385A discl
Method used
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Embodiment 1
[0046] Such as figure 1 As shown, the strong electromagnetic wave shielding adhesive tape of this embodiment forms an electromagnetic wave shielding film 1 by coating electromagnetic wave shielding slurry on one side of the transparent substrate 2, and forms an adhesive layer 3 by coating an adhesive on the other side. A release paper 4 is pasted on the surface of the adhesive layer.
[0047] The mass ratio of each raw material used in the electromagnetic wave shielding slurry in this embodiment is shown in Table 1, and the balance is water. The preparation steps are as follows:
[0048] (1) Silver nanowires, PEDOT:PSS, graphene, water-based acrylic resin S-812, water-based polyurethane resin Bayhydrol B130, small molecule dispersant sodium dodecylbenzene sulfonate, leveling agent Zonyl FSO, defoamer Mix Foamex810, curing agent SD 230 and water evenly in proportion to obtain electromagnetic shielding slurry;
[0049] (2) Coat the electromagnetic wave shielding slurry on one ...
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The invention discloses an electromagnetic wave shielding film and a highly transparent strong electromagnetic wave shielding tape based on the electromagnetic wave shielding film. The invention is characterized in that the electromagnetic wave shielding film is prepared by coating electromagnetic wave shielding slurry on a transparent substrate, while the strong electromagnetic wave shielding tape is prepared based on the electromagnetic wave shielding film, wherein the electromagnetic wave shielding slurry is prepared by mixing silver nanowires, PEDOT:PSS, graphene, water-based acrylic resins, waterborne polyurethane resins, a curing agent, a small molecule dispersant, a flatting agent, an antifoaming agent and water. The electromagnetic wave shielding tape disclosed by the invention can reach the visible light transmittance of 90% or higher and is high in shielding effectiveness and wide in frequency range.
Description
technical field [0001] The invention relates to electromagnetic wave shielding of electronic components used for display, in particular to an electromagnetic wave shielding film and an electromagnetic wave shielding adhesive tape based thereon. Background technique [0002] Electromagnetic wave shielding coatings have been developed since the 1930s, and alkyd resins, acrylic resins, polyvinyl chloride, and polystyrene resins are generally used as the main film-forming substances. In 1957, Japan began to produce silver-based and carbon-based electromagnetic shielding coatings. Among them, silver-based coatings are expensive to prepare because silver is used as the main shielding substance. In addition, some enterprises use carbon as the main shielding substance of electromagnetic shielding coatings, but due to the poor conductivity of carbon, the shielding effect is poor. At present, the electromagnetic wave shielding coating is mainly obtained by adding conductive particles...
Claims
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Patent Timeline
Login to view more IPC IPC(8): C09J7/02C08J7/04C09D133/00C09D175/04C09D5/24C08L67/02
CPCC08J7/0427C08J2367/02C08J2433/04C08J2475/04C08K2201/001C08K2201/011C08L2203/16C08L2205/035C09D5/24C09D133/00C09D175/04C09J7/255C08L75/04C08K13/04C08K7/06C08K3/04C08L33/00C08L65/00
Inventor 张梓晗吕鹏陶豹
Owner 合肥微晶材料科技有限公司
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