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OCA optical cement and OCA optical cement film

An optical glue and unsaturated technology, applied in the field of optical glue, can solve the problems of lower yield rate of OCA film, poor adhesion and peelability, poor wettability, etc., and achieve excellent wettability and excellent performance.

Active Publication Date: 2017-11-17
NALI OPTICAL MATERIAL DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing OCA optical adhesive generally has the problem of poor wettability, which leads to shrinkage easily when it is coated on the substrate to prepare the OCA film, which reduces the yield of the OCA film.
In addition, the OCA adhesive optical film formed by the existing OCA optical adhesive still has the problem of poor adhesion and peeling, which is difficult to meet the requirements of high-end electronic products.

Method used

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  • OCA optical cement and OCA optical cement film
  • OCA optical cement and OCA optical cement film
  • OCA optical cement and OCA optical cement film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0047] 1) Composition design

[0048] The composition of the OCA optical glue provided by the embodiment of the present invention is shown in the following table:

[0049] The composition of table 1 embodiment OCA optical glue

[0050]

[0051]

[0052] 2) film preparation

[0053] According to the proportions in Table 1, the components were mixed evenly to obtain the OCA optical adhesives provided in the four examples, which were named OCA optical adhesive 1, OCA optical adhesive 2, OCA optical adhesive 3, and OCA optical adhesive 4.

[0054] Use a slit coater to coat the OCA optical glue on the release film, first use a mercury lamp to cure with ultraviolet light, and the energy of ultraviolet light is 2000mJ / cm 2 , and then baked in an oven at 180°C for 5 minutes to obtain OCA optical adhesive films with a thickness of 200 μm, which were named OCA optical adhesive film 1, OCA optical adhesive film 2, OCA optical adhesive film 3, and OCA optical adhesive film 4.

Embodiment 5

[0056] With reference to the preparation method of Example 3, the only difference is that the energy of the ultraviolet light is adjusted to 2000mJ / cm 2 , the oven temperature was adjusted to 120°C, and the baking time was adjusted to 10 minutes to prepare an OCA optical adhesive film with a thickness of 200 μm, which was named OCA optical adhesive film 5.

Embodiment 6

[0058] With reference to the preparation method of Example 3, the only difference is that the energy of the ultraviolet light is adjusted to 3000mJ / cm 2 , the oven temperature was adjusted to 90°C, and the baking time was adjusted to 10 minutes to prepare an OCA optical adhesive film with a thickness of 200 μm, which was named OCA optical adhesive film 6.

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Abstract

The invention belongs to the field of optical cement, in particular to OCA optical cement and an OCA optical cement film. The OCA optical cement comprises, by weight, 10-40 parts of saturated polyacrylate with cross-linkable groups, 20-40 parts of oligomers with unsaturated bonds, 20-40 parts of diluent, 0.5-5 parts of photoinitiator and 0.1-2 parts of cross-linking agent. According to the OCA optical cement and the OCA optical cement film, components of the optical cement is subjected to optimization selection, and the OCA optical cement with excellent performance is obtained; the OCA optical cement is excellent in coating wettability, and shrinkage holes cannot exist on a base material in coating; the OCA optical cement film prepared from the optical cement has higher viscidity, residual gum does not easily exist when the optical cement film is attached to a display material, and the cement film has better stripping performance. The invention further provides the OCA optical cement film, the OCA optical cement film is formed after coating and solidifying of the OCA optical cement and has higher viscidity and better stripping performance.

Description

technical field [0001] The invention belongs to the field of optical glue, in particular to an OCA optical glue and an OCA optical glue film. Background technique [0002] OCA (Optical Clear Adhesive) optical adhesive film is a baseless double-sided laminating tape made of OCA optical adhesive. It has the characteristics of colorless and transparent, high light transmittance, and high adhesive strength. OCA optical adhesive film can be used in different fields according to different thicknesses. It is mainly used in the bonding of transparent optical components in electronic paper, projection screens, displays, lenses, and touch screens. [0003] With the rapid development of the electronic product industry in recent years, the market demand for OCA optical glue is increasing year by year, and it has broad development prospects. However, the existing OCA optical adhesive generally has the problem of poor wettability, which leads to shrinkage cavity easily when it is coated ...

Claims

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Application Information

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IPC IPC(8): C09J133/04C09J175/14C09J163/10C09J147/00C09J11/06C09J7/00
CPCC08L2205/03C09J7/00C09J11/06C09J133/04C09J2433/00C08L75/14C08L63/10C08L47/00
Inventor 朱文峰
Owner NALI OPTICAL MATERIAL DONGGUAN
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