OCA (optical clear adhesive), full-lamination OCA touch screen and preparation method of full-lamination OCA touch screen

An optically transparent adhesive, touch screen technology, applied in the direction of adhesives, polyether adhesives, adhesive types, etc., can solve the problem of uneven force on both sides of fully laminated polarizers, blue light leakage from electronic screens, and many times of lamination and other problems, to achieve the effect of reducing the blue light transmittance, reducing the number of laminations, and improving the yield rate

Pending Publication Date: 2022-05-17
厦门祥福兴科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an OCA optical transparent glue and a full-bonded OCA touch screen and its preparation method to solve the problem of product defect rate caused by many times of lamination, large-area lamination, and full-lamination polarized light in the prior art. The problem of uneven force on both sides of the film and blue light leakage from the electronic screen

Method used

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  • OCA (optical clear adhesive), full-lamination OCA touch screen and preparation method of full-lamination OCA touch screen
  • OCA (optical clear adhesive), full-lamination OCA touch screen and preparation method of full-lamination OCA touch screen
  • OCA (optical clear adhesive), full-lamination OCA touch screen and preparation method of full-lamination OCA touch screen

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preparation example Construction

[0032] The invention provides a method for preparing a full-fit OCA touch screen, comprising the following steps:

[0033] Graphene oxide, prepolymer, tackifying resin, photoinitiator and reactive diluent are mixed and coated on the lower surface of the touch screen, and the OCA optically transparent adhesive layer is obtained after UV light curing;

[0034] A fully bonded OCA touch screen is obtained by attaching a release film to the lower surface of the OCA optically transparent layer.

[0035] In the present invention, the thickness of the OCA optically transparent adhesive layer is 50-250 μm, preferably 80-220 μm, more preferably 100-200 μm.

[0036] In the present invention, the UV light curing includes: using a light intensity of 50-200mW / cm 2 1. One or two kinds of mixed UV light curing with wavelengths of 254nm and 365nm for 20-180s; preferably, the light intensity is 100-150mW / cm 2 1. One or two kinds of mixed UV light curing with wavelengths of 254nm and 365nm for...

Embodiment 1

[0039] Preparation of OCA optically transparent glue:

[0040] In parts by mass, mix 85 parts of polyurethane acrylic resin, 6.5 parts of terpene resin, and 6.2 parts of hexanediol diacrylate, then add 2.3 parts of benzophenone and stir evenly, and finally mix with 0.005 parts of graphene oxide Uniform, after vacuum defoaming treatment, liquid OCA optical glue is obtained.

[0041] Preparation of full-fit OCA touch screen:

[0042]Evenly coat the liquid OCA optically transparent adhesive on the lower surface of the touch screen, and then cure it with a UV lamp with a wavelength of 365nm for 50s to obtain an OCA optically transparent adhesive layer attached to the lower surface of the touch screen. The thickness of the adhesive layer after UV curing is 120 μm. The size of the adhesive layer is the same as the size of the lower surface of the touch screen. A release film of the same size is attached to the lower surface of the OCA optically transparent adhesive layer to protec...

Embodiment 2

[0044] Preparation of OCA optically transparent glue:

[0045] In parts by mass, mix 90 parts of polyester acrylate, 5 parts of rosin, and 10 parts of neopentyl glycol diacrylate, then add 5 parts of benzoin dimethyl ether and stir evenly, and finally mix with 0.01 part of graphene oxide Uniform, after vacuum defoaming treatment, liquid OCA optical glue is obtained.

[0046] Preparation of full-fit OCA touch screen:

[0047] Evenly coat the liquid OCA optically transparent adhesive on the lower surface of the touch screen, and then cure it with UV lamps with wavelengths of 254nm and 365nm for 60s to obtain an OCA optically transparent adhesive layer attached to the lower surface of the touch screen. The thickness of the adhesive layer after UV curing is 150μm, the size of the adhesive layer is the same as the size of the lower surface of the touch screen. A release film of the same size is attached to the lower surface of the OCA optically transparent adhesive layer to prote...

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Abstract

The invention provides an OCA (optical clear adhesive), a full-lamination OCA touch screen and a preparation method of the full-lamination OCA touch screen, and belongs to the technical field of optical display devices. The OCA optical transparent adhesive is obtained by mixing the graphene oxide, the prepolymer, the tackifying resin, the photoinitiator and the reactive diluent. The OCA optical transparent adhesive is fully laminated on the touch screen, and then a layer of release film is attached to one side of the OCA optical transparent adhesive layer, so that the fully laminated OCA touch screen is obtained. A separation film on the lower surface of an OCA optical adhesive layer in the prior art is omitted, and due to the fact that a proper amount of graphene oxide is added, the OCA optical adhesive not only has excellent bonding performance and chemical resistance and high light transmittance, but also can effectively reduce the blue light transmittance of a display screen and improve the display quality. According to the full-lamination OCA touch screen, the phenomenon that stress on the upper face and the lower face of a full-lamination polaroid is not uniform due to the fact that the thickness difference of PSA glue and OCA glue layers on the upper face and the lower face of the polaroid is large in the prior art is avoided.

Description

technical field [0001] The invention relates to the technical field of optical display devices, in particular to an OCA optical transparent glue, a fully bonded OCA touch screen and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, liquid crystal displays are widely used in daily life, and the configuration of display devices is also constantly improving. A touch screen is assembled on the top of the liquid crystal display module to form a popular display device with touch function. Touch screen (touch panel, TP), also known as "touch screen" or "touch panel", is an inductive liquid crystal display device that can receive input signals such as contacts. The advanced tactile feedback system can drive various connected devices according to pre-programmed programs, which can be used to replace mechanical button panels, and create vivid audio-visual effects through the LCD screen. As an input device, the touch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J167/06C09J171/00C09J11/04G06F3/044
CPCC09J175/14C09J167/06C09J171/00C09J11/04G06F3/044C08K3/042
Inventor 蔡福水杨洋陈国华郑资远詹潮洪
Owner 厦门祥福兴科技股份有限公司
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