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A kind of release film for OCA optical glue and preparation method thereof

A technology of release film and optical adhesive, applied in the direction of film/sheet release liner, coating, etc., can solve the problems of large gap in quality requirements, low resin crosslinking degree, organic solvent volatilization, etc., and achieve low production cost , high production efficiency and stable quality

Inactive Publication Date: 2018-05-22
NALI OPTICAL MATERIAL DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Although there are many release film manufacturers in China at present, because the release film involves many industries and the quality requirements vary greatly, most manufacturers in China use ordinary coating machines to produce in general workshops, and there are a large amount of organic solvent volatilization, Low cross-linking degree of resin and many dirt problems, its products are used in packaging and waterproof fields with low requirements

Method used

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  • A kind of release film for OCA optical glue and preparation method thereof
  • A kind of release film for OCA optical glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A release film for OCA optical glue, comprising a substrate layer 1 and a release layer 2 attached to the upper surface of the substrate layer 1, the release layer 2 is made by coating a release agent, the release layer Formulation comprises the raw material of following weight portion:

[0031] Polymer 100 parts

[0032] 1 part of cross-linking agent

[0033] Catalyst 0.1 part

[0034] 500 parts of solvent.

[0035] The thickness of the substrate layer 1 is 20 μm; the thickness of the release layer 2 is 0.1 μm.

[0036] The substrate layer 1 is a PET film with a light transmittance greater than 90%.

[0037] The polymer is polysiloxane, acrylate-modified silicone resin or silicone.

[0038] The crosslinking agent is methylmethoxysiloxane, N-2-(aminoethyl)-3 aminopropylmethyldimethoxysilane or vinyltriethoxysilane.

[0039] The catalyst is a platinum catalyst.

[0040] The solvent is 120# gasoline, toluene, xylene, dimethyl hydrogen silicone oil, butanone, petrol...

Embodiment 2

[0046] The difference between this embodiment and the above-mentioned embodiment 1 is:

[0047] Described release agent comprises the raw material of following weight portion:

[0048] Polymer 100 parts

[0049] Cross-linking agent 2 parts

[0050] Catalyst 0.2 part

[0051] Solvent 1000 parts.

[0052] The thickness of the substrate layer 1 is 50 μm; the thickness of the release layer 2 is 0.3 μm.

[0053] The substrate layer 1 is a PEN film with a light transmittance greater than 90%.

[0054] The polymer is a mixture of any two of polysiloxane, acrylate-modified silicone resin and silicone.

[0055] The crosslinking agent is composed of any two of methylmethoxysiloxane, N-2-(aminoethyl)-3 aminopropylmethyldimethoxysilane and vinyltriethoxysilane mixture.

[0056] The catalyst is a silver-palladium catalyst.

[0057] The solvent is a mixture of any two of 120# gasoline, toluene, xylene, dimethylhydrogen silicone oil, butanone, petroleum ether, cyclohexane and tetrahydr...

Embodiment 3

[0062] The difference between this embodiment and the above-mentioned embodiment 1 is:

[0063] Described release agent comprises the raw material of following weight portion:

[0064] Polymer 100 parts

[0065] 3 parts of cross-linking agent

[0066] Catalyst 0.3 parts

[0067] Solvent 2000 parts.

[0068] The thickness of the substrate layer 1 is 100 μm; the thickness of the release layer 2 is 0.25 μm.

[0069] The substrate layer 1 is a PC film with a light transmittance greater than 90%.

[0070] The polymer is a mixture composed of polysiloxane, acrylate-modified silicone resin and silicone in a weight ratio of 0.8:1.4:1.

[0071] Described cross-linking agent is by methyl methoxy siloxane, N-2-(aminoethyl)-3 aminopropyl methyl dimethoxy silane and vinyl triethoxy silane with weight ratio 1: A mixture composed of 0.5:1.5.

[0072] The catalyst is a platinum-rhodium catalyst.

[0073] The solvent is a mixture composed of dimethylhydrogen silicone oil, cyclohexane a...

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Abstract

The invention relates to the technical field of release films, particularly to a release film for an Optically Clear Adhesive (OCA) and a preparation method of the release film. The release film comprises a substrate layer and a release layer adhered on the upper surface of the substrate layer, wherein the release layer is prepared by coating with a release agent, and comprises the following raw materials in parts by weight: 100 parts of polymer, 1-5 parts of a cross-linking agent, 0.1-0.5 part of a catalyst and 500-4,000 parts of a solvent. Through adoption of such raw materials and strict control of the weight ratio of the raw materials, the obtained release layer has the advantages that the thickness is 0.1-0.6 [mu]m, the residual adhesive power can reach 90% or above, the initial release power is stable, and the film surface tolerance is within a range of + / - 1%.

Description

technical field [0001] The invention relates to the technical field of release films, in particular to a release film used for OCA optical adhesives and a preparation method thereof. Background technique [0002] Although there are many release film manufacturers in China at present, because the release film involves many industries and the quality requirements vary greatly, most manufacturers in China use ordinary coating machines to produce in general workshops, and there are a large amount of organic solvent volatilization, Resin has low cross-linking degree and much dirt. Its products are used in packaging and waterproof fields with low requirements. [0003] High-end release films used in optical grade products need to be produced in 1,000-class or 10,000-class dust-free workshops, which require high precision coating equipment, strict environmental protection certification, and high entry barriers. The OCA optical glue used in the screen has stricter requirements on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D7/63C09J7/40
CPCC08K5/5419C08K5/5425C08K5/544C08L2205/025C08L2205/03C09D7/63C09D183/04C08L83/04
Inventor 朱文峰
Owner NALI OPTICAL MATERIAL DONGGUAN
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