AB double-faced adhesive tape for laminating large-size screen, and preparation method thereof

A double-sided tape, large-size technology, applied in the directions of adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problems of large shrinkage, air bubbles, curing difficulties, etc., and achieve good filling performance and preparation technology. Simple, clarity-enhancing effects

Pending Publication Date: 2021-12-03
TAIHU JINZHANG TECH CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the display market tends to be subdivided and personalized, and large screens have become the standard configuration of LCD manufacturers. The full bonding process of large screens is complicated, the production yield is low, and rework is difficult. Due to the large screen size, the corresponding The size of the glass module and the liquid crystal display module is relatively large, and the parallelism between the modules will be deviated due to the material, size, etc. At the same time, there will be a 4-10 μm thickness of shading ink on the edge around the glass module. , in the process of module bonding, there will be poor bonding, bubbles after bonding, and foaming due to temperature and humidity after bonding. Therefore, the special adhesive production industry used by it also faces many problems. needs and challenges
The special adhesives widely used in the market for bonding include OCA, water glue and other products. Among them, OCA is cut according to the shape of the attached display screen and used for optical bonding, and water glue can be cured under the action of ultraviolet light. However, for large-size screens, the water glue is difficult to cure in the dark edge area, and the shrinkage rate before and after curing is large (2-3%), resulting in the problem of yellowing in the visible area; OCA lamination is difficult to repair during production and use , Poor temperature resistance, easy to wrinkle, discount, indentation, dust absorption and other problems in the production process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • AB double-faced adhesive tape for laminating large-size screen, and preparation method thereof
  • AB double-faced adhesive tape for laminating large-size screen, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of AB double-sided tape for laminating large-size screens, comprising the following steps:

[0028] S1. Coat the high-viscosity silica gel layer glue on one side of the PET substrate, dry and solidify to form a high-viscosity silica gel layer;

[0029] S2. Attach the release film B protective layer on the high-viscosity silica gel layer;

[0030] S3, coating the acrylic adhesive layer glue on the other side of the substrate, and curing by ultraviolet light to form an acrylic adhesive layer;

[0031] S4. Attach the release film A protective layer on the acrylic adhesive layer to obtain the product.

[0032] Wherein, the high-viscosity silicone layer glue includes the following components by mass: 75 parts of high-viscosity silicone resin, 12 parts of low-viscosity silicone resin, 3 parts of ultra-low-viscosity silicone resin, 0.2 parts of curing agent, and 0.1 part of inhibitor , 0.05 parts of adhesion promoter, 0.5 parts of catalyst, 10 parts of k...

Embodiment 2

[0036] A preparation method of AB double-sided tape for laminating large-size screens, comprising the following steps:

[0037] S1. Coat the high-viscosity silica gel layer glue on one side of the PET substrate, dry and solidify to form a high-viscosity silica gel layer;

[0038] S2. Attach the release film B protective layer on the high-viscosity silica gel layer;

[0039] S3, coating the acrylic adhesive layer glue on the other side of the substrate, and curing by ultraviolet light to form an acrylic adhesive layer;

[0040] S4. Attach the release film A protective layer on the acrylic adhesive layer to obtain the product.

[0041] Wherein, the high-viscosity silicone layer glue includes the following components by mass: 80 parts of high-viscosity silicone resin, 10 parts of low-viscosity silicone resin, 4 parts of ultra-low-viscosity silicone resin, 0.25 parts of curing agent, and 0.2 parts of inhibitor , 0.07 parts of adhesion promoter, 0.85 parts of catalyst, 13.5 parts...

Embodiment 3

[0045] A preparation method of AB double-sided tape for laminating large-size screens, comprising the following steps:

[0046] S1. Coat the high-viscosity silica gel layer glue on one side of the PET substrate, dry and solidify to form a high-viscosity silica gel layer;

[0047] S2. Attach the release film B protective layer on the high-viscosity silica gel layer;

[0048] S3, coating the acrylic adhesive layer glue on the other side of the substrate, and curing by ultraviolet light to form an acrylic adhesive layer;

[0049] S4. Attach the release film A protective layer on the acrylic adhesive layer to obtain the product.

[0050] Wherein, the high-viscosity silicone layer glue includes the following components by mass: 85 parts of high-viscosity silicone resin, 7 parts of low-viscosity silicone resin, 5 parts of ultra-low-viscosity silicone resin, 0.3 parts of curing agent, and 0.3 parts of inhibitor , 0.08 parts of adhesion promoter, 1 part of catalyst, 15 parts of keto...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tackinessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an AB double-faced adhesive tape for large-size screen lamination, and a preparation method thereof, and relates to the technical field of special adhesives for screen lamination. The AB double-faced adhesive tape sequentially comprises a release film A protective layer, an acrylic adhesive layer, a base material, a high-viscosity silica gel layer and a release film B protective layer from bottom to top; and the deformation rate of the acrylic adhesive layer at normal temperature is greater than or equal to 30%, and the viscosity is 1000-2000 g / in. According to the invention, the acrylic adhesive layer has a good deformation rate, and can completely fill the segment difference generated by the shading ink frame segment difference of the TP module and the parallelism difference between modules under a full-lamination process; the high-viscosity silica gel layer is high in viscosity, so that the high-viscosity silica gel layer has a certain capability of filling a section difference between planes; and the base material is arranged inside, so that the interference generated by the two adhesive systems can be isolated, the subsequent light refractive index is changed, and the display definition is improved. The AB double-sided adhesive tape prepared by the invention is good in light transmittance, low in haze and suitable for lamination of a large screen, and under a full-lamination process condition, reworking is more convenient, and the efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of special adhesives for bonding screens, in particular to an AB double-sided adhesive for bonding large-size screens and a preparation method thereof. Background technique [0002] The screen structure is generally divided into three parts: protective glass, touch screen, and display screen, which need to be bonded. According to the bonding method, it can be divided into frame bonding and full bonding process. Frame stickers use double-sided adhesive tape to fix the touch screen and the four sides of the display screen. There is an air layer between the display screen and the touch screen, which results in poor display effect and short life of the display screen. At present, most of them adopt the full lamination process, which uses water glue or optical glue to glue the display screen and touch screen together seamlessly. Full lamination can reduce the air gap between the display screen and the touch scr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): C09J7/25C09J7/30C09J4/02C09J4/06C09J183/04C09J11/08
CPCC09J7/255C09J7/30C09J4/06C09J183/04C09J11/08C09J2301/1242C09J2203/318C09J2467/006C09J2301/312C08L83/04
Inventor施克炜童元满
OwnerTAIHU JINZHANG TECH CO LTD