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OCA optical glue film, and manufacturing method thereof

A manufacturing process, optical adhesive technology, applied in adhesives, flat products, other household appliances, etc., can solve the problems of incomplete curing, poor filling, single glue layer structure, etc., and achieve the effect of reducing curing difficulty and good filling.

Pending Publication Date: 2017-10-13
NALI OPTICAL MATERIAL DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing OCA optical adhesive film generally only has a thicker CA optical adhesive layer. Due to the single structure of the adhesive layer, the existing OCA optical adhesive film generally has the problem of poor filling performance.
In addition, due to the large thickness of the adhesive layer, there is often the problem of incomplete curing during production, resulting in overflow and residual adhesive during the die-cutting process, which seriously restricts the production yield and use yield of OCA optical adhesive.

Method used

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  • OCA optical glue film, and manufacturing method thereof
  • OCA optical glue film, and manufacturing method thereof
  • OCA optical glue film, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] 1) Coat the soft glue layer glue (solid content: 40wt%) on the 50μm medium release film, and enter the thermal curing section: solvent drying treatment is carried out at an average temperature of 130°C for 1.5min. The coating method adopts slit extrusion coating, the dry glue thickness of the soft rubber layer is 150μm, and the peeling force of the release film is 15gf / 25mm.

[0076] 2), UV pre-curing section: After thermal curing, it enters the pre-curing section. The curing lamp in this section is cured by a low-pressure mercury lamp (UVC band ultraviolet light, the main wavelength is 253.7nm), and the lamp tubes are required to be arranged in the glue coating On the upper side, its curing energy is 100mJ / cm 2 .

[0077] 3), UV main curing section: After passing through the pre-curing section, it enters the main curing section. The curing lamp in this section uses a high-pressure mercury lamp (UVA band ultraviolet light, the main wavelength is 365nm) and a metal hali...

Embodiment 2

[0083] 1) Coat the soft glue layer glue (solid content 40wt%) on the 50μm medium release film, and enter the thermal curing section: solvent drying treatment is carried out at an average temperature of 130°C for 1min. The coating method adopts slit extrusion coating, the dry glue thickness of the soft rubber layer is 100μm, and the peeling force of the release film is 20gf / 25mm.

[0084] 2), UV pre-curing section: After thermal curing, it enters the pre-curing section. The curing lamp in this section is cured by a low-pressure mercury lamp (UVC band ultraviolet light, the main wavelength is 253.7nm), and the lamp tubes are required to be arranged in the glue coating On the upper side, its curing energy is 100mJ / cm 2 .

[0085] 3), UV main curing section: After passing through the pre-curing section, it enters the main curing section. The curing lamp in this section uses a high-pressure mercury lamp (UVA band ultraviolet light, the main wavelength is 365nm) and a metal halide ...

Embodiment 3

[0091] 1) Coat the soft glue layer glue (solid content 40wt%) on the 50μm medium release film, and enter the thermal curing section: solvent drying treatment is carried out at an average temperature of 130°C for 1min. The coating method adopts slit extrusion coating, the dry glue thickness of the soft rubber layer is 150μm, and the peeling force of the release film is 20gf / 25mm.

[0092] 2), UV pre-curing section: After heat curing, it enters the pre-curing section. This section of curing lamp adopts low-pressure mercury lamp (UVC band ultraviolet light, main wavelength is 253.7nm) for curing, and the lamp tube is required to be arranged on the upper side of the glue coating surface, and its curing energy is 100mJ / cm 2 .

[0093] 3), UV main curing section: After passing through the pre-curing section, it enters the main curing section. This section of curing lamp adopts a mixed curing method of high-pressure mercury lamp (UVA band ultraviolet light, main wavelength is 365nm...

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Abstract

The invention belongs to the field of glue material, and especially relates to an OCA optical glue film, and a manufacturing method thereof. The OCA optical glue film comprises a first release film layer, a soft glue layer, a first hard glue layer, and a second release film layer which are contacted successively, or comprises a first release film layer, a second hard glue layer, a soft glue layer, a first hard glue layer, and a second release film layer which are contacted successively; the shore hardness of the soft glue layer ranges from 5 to 50A, and the thickness ranges from 50 to 200<mu>m; the shore hardness of the first hard glue layer and the second hard glue layer ranges from 15 to 50D, and the thickness ranges from 50 to 150<mu>m. according to the manufacturing method, the OCA optical glue film is provided with a multi-layer structure with different hardness, so that the OCA optical glue film is provided with appropriate hardness and elasticity, and excellent fillibility. The OCA optical glue film possesses the multi-layer structure, and all the glue layers are relatively thin, so that solidification difficulty of the glue layers in glue layer production is reduced.

Description

technical field [0001] The invention belongs to the field of adhesive materials, in particular to an OCA optical adhesive film and a manufacturing process thereof. Background technique [0002] OCA (Optical Clear Adhesive) optical adhesive film is a baseless double-sided lamination tape made of OCA optical adhesive after curing. 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 mobile phone screens to bond ITO films and ITO films and plastic nameplates. [0003] Existing OCA optical adhesive films generally have only one thick CA optical adhesive layer. Due to the single structure of the adhesive layer, the existing OCA optical adhesive films generally have the problem of poor filling properties. In addition, due to the large thickness of the adhesive layer, there is often the problem of incomplete cu...

Claims

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Application Information

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IPC IPC(8): C09J7/00B29C65/48B29L7/00
CPCC09J7/00B29C65/4845B29C66/45B29L2007/00C09J2203/318C09J2301/208C09J2301/312
Inventor 朱文峰
Owner NALI OPTICAL MATERIAL DONGGUAN
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