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Shading type electromagnetic shielding adhesive tape

An electromagnetic shielding and adhesive tape technology, applied in adhesives, adhesive types, conductive adhesives, etc., can solve the problems of easy warping of tapes, poor reworkability, etc., and achieve difficult to break, suitable temperature, and improved tensile strength Effect

Pending Publication Date: 2020-07-03
SUZHOU ENBRIGHTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems existing in the prior art, the object of the present invention is to provide a light-shielding electromagnetic shielding tape, which can be used for display module wrapping, and solve the problems of the existing tapes such as easy edge warping and poor reworkability

Method used

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  • Shading type electromagnetic shielding adhesive tape
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Examples

Experimental program
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Effect test

preparation example Construction

[0053] The preparation steps of the black conductive pressure-sensitive adhesive layer 3 are:

[0054] Black dye, conductive particles, and acrylate polymers are uniformly dissolved and dispersed in a solvent (ethyl acetate, toluene, or methyl ethyl ketone, etc.), and then coated on the lower surface of the metal foil 23. After the solvent is dried, the release film 4 is pasted and Obtained by ripening. It is also possible to dissolve and disperse black dyes, conductive particles and acrylate polymers in solvents (ethyl acetate, toluene or methyl ethyl ketone, etc.) and then coat them on the release film 4, then dry the solvents and stick them to the substrate The lower surface of the metal foil 23 of layer 2 is obtained by curing.

[0055] The release film 4 is a polyester release film with a thickness of 20um-125um, preferably 36um-75um.

[0056] The release force of the contact surface between the release film 4 and the black conductive pressure-sensitive adhesive layer 3...

Embodiment 1

[0062] Such as Figure 1-2 As shown, a light-shielding electromagnetic shielding adhesive tape includes a black light-shielding insulating layer 1, a base material layer 2, a black conductive pressure-sensitive adhesive layer 3 and a release film 4 arranged sequentially from top to bottom, and the base material layer 2 includes The film layer 21 , the adhesive layer 22 and the metal foil 23 are arranged sequentially from top to bottom. The film layer 21 is a polyester film with a thickness of 7um-15um.

[0063] In terms of mass percentage, the black light-shielding insulating layer 1 includes the following components:

[0064] Dye 5~8%

[0065] 0.5-2% filler with matting function.

[0066] The black light-shielding insulating layer is obtained by uniformly dissolving and dispersing the two components of the dye and the filler with matting function in ethyl acetate, and then coating on the film layer 21 and drying and curing.

[0067] The black conductive pressure-sensitive ...

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Abstract

The invention discloses a shading type electromagnetic shielding adhesive tape. The adhesive tape comprises a base material layer composed of a film layer and a metal foil; a black shading insulatinglayer; a black conductive pressure-sensitive adhesive layer, which is arranged on the side, deviating from the film layer, of the surface of the metal foil; a release film, which is arranged on the side, deviating from the metal foil layer, of the surface of the black conductive pressure-sensitive adhesive layer; and an adhesive layer, which contains a polyester component and an isocyanate component and is arranged between the film layer and the metal foil. The film layer is a polyester film, the breaking load of the base material layer measured according to a type III sample in the national standard GB / T 13022-1991 is not less than 20N; the tensile strength of the adhesive tape is improved, the adhesive tape is not easily to break down under a heavy load; an acrylate polymer molecular chain contains proper polar groups and has proper molecular weight distribution; the glass transition temperature of the acrylate polymer is -60 to 0 DEG C; the temperature is proper; the re-workabilityis improved; the edge warping is avoided; the whole structure is simple, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of adhesive tapes, and in particular relates to a light-shielding electromagnetic shielding adhesive tape. Background technique [0002] With the development of electronic consumer product manufacturing technology, more and more monitors, LCD TVs, touch panels, mobile phones and other products need to use conductive tape with light-shielding and electromagnetic shielding functions to wrap the display module . Moreover, in order to meet the market demand, the frame of the display module is becoming narrower and narrower, resulting in a smaller bonding area of ​​the tape on the display surface, and the tape is more likely to warp during the use of the display module, so the adhesive performance of the tape The requirements are also getting higher and higher. [0003] On the other hand, there is a certain probability of defective products in the manufacturing process of the display module, and it is necessary...

Claims

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Application Information

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IPC IPC(8): C09J7/29C09J7/38C09J133/04C09J9/02C09J11/06
CPCC09J7/29C09J7/385C09J133/04C09J9/02C09J11/06C09J2203/318C09J2433/00C09J2400/163C09J2475/00C08K3/36C08K13/06C08K5/18C08K3/04C08K3/08C08K9/10
Inventor 张杰王泽勇张斌吴运阁
Owner SUZHOU ENBRIGHTECH