Black light shielding adhesive tape and preparation method thereof

Abstract

The invention provides a black light shielding adhesive tape and a preparation method thereof. The black light shielding adhesive tape consists of a PET (Polyethylene Terephthalate) base layer, an inklayer, a first adhesive layer, a second adhesive layer and a protection layer. The black light shielding adhesive tape is simple in preparation process, easy to operate and applicable to industrial production; secondly, the ink layer is made of environmental-friendly aqueous black ink, a nano Al / Al2O3 core-shell material light absorbent is capable of effectively absorbing light fed into the ink layer, a screen display effect can be effectively improved, and the problem that the edge of a screen is bright while a backlight source is fed into the screen from a transparent adhesive layer can besolved. Therefore, the black light shielding adhesive tape provided by the invention has the characteristics of being long in service life, environmentally friendly, good in adhesion, good in light shielding property, easy to repair and good in high temperature resistance; in addition, the first adhesive layer optimally comprises nano silicon dioxide, so that the adhesive tape has a convex-concavesurface and has a small contact area with a display panel, the display panel is not damaged or a backlight module is disassembled when being dismounted, convenience in dismounting can be achieved, and high rework efficiency can be achieved.

Description

technical field [0001] The invention relates to the technical field of light-shielding tapes, in particular to a black-black light-shielding tape and a preparation method thereof. Background technique [0002] Shading tape, that is, the tape used to realize light barrier, is widely used in the fixing of backlight modules and various light shading of notebook computers, mobile phones, PDAs, LEDs, LCDs, luminous keyboards, ultra-thin advertising light boxes, backlight panels (sheets), etc. application. Minimize the impact of light in applications that require controlled brightness. With the development of society and the improvement of people's needs, people have put forward higher requirements for shading tape. [0003] The Chinese patent literature with the application number 201310285808.4 introduces a PCB board light-shielding tape, which is composed of a polyvinyl chloride base layer, a release layer, an adhesive layer and a primer layer. It has simple process steps, go...

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Problems solved by technology

[0003] The Chinese patent literature with the application number 201310285808.4 introduces a PCB board light-shielding tape, which is composed of a polyvinyl chloride base layer, a release layer, an adhesive layer and a primer layer. It has simple process steps, good adhesion and avoids Both ends are warped and glued, but PVC will drop some toxic additives during use, which may cause cancer and other diseases, and seriously endanger people's health

The Chinese patent document with application number 201710347434.2 introduces an ultra-narrow frame light-shielding tape, which is composed of a base material layer, a first adhesive layer, a second adhesive layer, a heavy release film and a light release film. A nanoparticle with the function of absorbing the light source is added to the adhesive, which can not only effectively fix the backlight module and the LCD screen, but also effectively absorb the light entering the adhesive layer, effectively improving the display effect of the screen, but its The adhesive layer is relatively thick. During the processing and molding of the light-shielding tape, glue overflow will occur during die-cutting, which will affect the quality of the light-emitting surface of the backlight module.

Black black shading tape is a black single / double-sided tape with light shading function. It uses black film as the base material and has excellent light shading performance, but it still has problems such as poor viscosity and difficult repair.

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