Bonding method of touch screen substrates, and binder for same

A technology of adhesives and screen substrates, applied in the direction of adhesive types, grafted polymer adhesives, adhesives, etc., can solve the problems of yellowing of the visible area of ​​the touch screen and unavoidable yellowing of adhesives, and achieve The effect of short curing time

Active Publication Date: 2012-04-25
塔威新材料科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method avoids heating, the main adhesive still contains peroxide, which still cannot avoid the defects that the adhesive turns yellow during storage and the visible area of ​​the touch screen turns yellow.

Method used

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  • Bonding method of touch screen substrates, and binder for same
  • Bonding method of touch screen substrates, and binder for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First prepare the substrate with shaded area and transparent area; then take 45.0g of isopropanol and 50.0g of ethyl acetate and mix them evenly in a blender, then add 5.0g of 2,2-azobisisobutyronitrile and stir until no visible particles , during the stirring process, the temperature is controlled not to be higher than 20 °C to prepare the primer adhesive, take a certain amount of the prepared primer adhesive and evenly apply it to the shadow area on one side of the substrate, and let it stand to be in the primer adhesive The organic solvent is completely volatilized; then take 10.0g (meth)hydroxypropyl acrylate, 50.0g polyether (meth)acrylate and 37.5g polyester polyol and add them to the stirrer and stir for 30 minutes, then add 2.5g N-formazol N-methyldiethanolamine benzophenone is stirred for 60-90 minutes to completely dissolve the N-methyldiethanolamine benzophenone to prepare the main body adhesive. Take a certain amount of main body adhesive and apply it evenly ...

Embodiment 2

[0036]First prepare the substrate with shaded area and transparent area; then take 29.0g of toluene, 25.0g of n-hexane and 45.0g of chloroform into the mixer and mix evenly, then add 1.0g of dilauroyl peroxide and stir until there are no visible particles. Control the temperature not higher than 20°C to prepare the primer adhesive. Take a certain amount of the prepared primer adhesive and apply it evenly on the shadow area on one side of the substrate, and let it stand until the organic solvent in the primer adhesive is completely Volatilize; take 70.0g (meth)isobornyl acrylate, 10.0g polyester (meth)acrylate and 19.5g polyether polyols and add them to the stirrer and stir for 30 minutes, then add 0.5g 2-hydroxyl-2-methyl Base-1-phenylpropan-1-one was stirred for 60-90 minutes to completely dissolve 2-hydroxy-2-methyl-1-phenylpropan-1-one to prepare the main body adhesive, take a certain amount of main body adhesive The binder is evenly coated on the transparent area on the sa...

Embodiment 3

[0039] First prepare the substrate with shaded area and transparent area; then take 30.0g of toluene, 30.0g of acetone and 30.0g of dichloromethane into the mixer and mix evenly, then add 10.0g of dibenzoyl peroxide and stir until no visible particles, During the stirring process, the temperature is controlled not to be higher than 20°C to prepare the primer binder, take a certain amount of the prepared primer binder and evenly coat the shadow area on one side of the substrate, and let it stand until the organic primer in the primer binder The solvent is completely evaporated; then take 15.0g ethoxy (meth)acrylate, 20.0g urethane (meth)acrylate and 60.0g liquid polybutadiene and add it to the stirrer and stir for 30 minutes, then add 5.0g 1-hydroxyl Cyclohexyl phenyl ketone was stirred for 60-90 minutes to completely dissolve 1-hydroxycyclohexyl phenyl ketone to obtain the main body adhesive. Take a certain amount of main body adhesive and evenly coat the transparent area on th...

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PUM

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Abstract

The invention discloses a bonding method of touch screen substrates, comprising the following steps of: (1) preparing a substrate to be bonded, wherein the substrate has a shadow region and a transparent region; (2) uniformly coating a prime coat binder on the shadow region at one surface of the substrate; (3) uniformly coating a main binder on the transparent region at the same surface of the substrate; (4) bonding the other substrate with the substrate coated with the prime coat binder and the main binder; (5) procuring the two substrates via a UV lamp; (6) curing the procured substrates through ultraviolet radiation by the UV lamp; (7) baking the two substrates in a baking oven. The invention further discloses a binder for bonding of the touch screen substrates, wherein the binder comprises the prime coat binder and the main binder, and can cure and curdle under a lower temperature, the curing time is short, the main binder is free of hyperoxide and can be stored at room temperature, so that the binder cannot turn yellow in the storage process, and a view area of the touch screen cannot turn yellow.

Description

technical field [0001] The invention relates to the technical field of touch screen manufacturing, in particular to a method for bonding touch screen substrates, and meanwhile, the invention also discloses an adhesive for bonding touch screen substrates. Background technique [0002] As soon as the touch screen mobile phone appeared, it became the new favorite in the mobile phone market and was welcomed by consumers. However, the adhesion between the substrates in the touch screen has always been a technical problem that plagues mobile phone manufacturers. The development of high-quality substrate adhesives has become a research hotspot in the industry. For example, 3M Innovative Properties Company of the United States submitted PCT international application WO 2010 / 111316A2 on March 24, 2010, which relates to an optical assembly with a display touch screen, wherein the substrates are bonded with an adhesive layer. The adhesive includes a reaction product of a multifunctio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041H01L21/56C09J151/08C09J151/00
Inventor 柳成良
Owner 塔威新材料科技(上海)有限公司
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