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Heavy release film for OCA optical adhesive

A technology of re-release and release film, applied in the field of OCA optical adhesive, can solve the problems of unclear release force explanation, inability to obtain OCA optical adhesive re-release film, no detailed explanation, etc., to achieve excellent release performance, The effect of high adhesion and strong release force

Pending Publication Date: 2021-03-30
JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this prior art proposes the composition of the heavy release film and the light release film, it only proposes the release force ratio of the two, but it is not clear how to obtain such a release force. The release force is controlled by adding a control agent. As for what the control agent is, there is no detailed explanation
Therefore, through this prior art, those skilled in the art cannot obtain the heavy release film that can be used for OCA optical glue

Method used

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  • Heavy release film for OCA optical adhesive
  • Heavy release film for OCA optical adhesive
  • Heavy release film for OCA optical adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] With the polybutadiene polyurethane of 50 weight parts, the polyacrylate resin of 50 weight parts, the 1 of 20 weight parts, 3-dioxane, the tetramethyltetravinyl cyclotetrasiloxane of 20 weight parts, 25 Parts by weight of octadecyl methacrylate active monomer diluent, 20 parts by weight of tetrahydrofuran are uniformly mixed, adding 1 part by weight of initiator is 2-hydroxyl-2-methyl-1-phenyl-1-propanone , magnetically stirred for 120 seconds to obtain a release agent.

[0033] The release agent is evenly coated on the surface of the PET release film substrate 21 with a thickness of 80 μm, vacuum defoaming for 1 hour, N 2 The release agent layer 22 was formed after being irradiated with ultraviolet light for 180 seconds under certain conditions, and the thickness of the release agent layer 22 was measured to be 1.5 μm.

[0034] After testing, the release agent layer 22 of this embodiment has good stability below 120°C, without decomposition and detachment, and still ...

Embodiment 2

[0036] The polybutadiene polyurethane of 150 weight parts, the polyacrylate resin of 90 weight parts, the 1,3-dioxane of 40 weight parts, the tetramethyltetravinyl cyclotetrasiloxane of 50 weight parts, 55 Parts by weight of octadecyl methacrylate reactive monomer diluent, 40 parts by weight of tetrahydrofuran are uniformly mixed, adding 5 parts by weight of initiator is 2-hydroxyl-2-methyl-1-phenyl-1-propanone , magnetically stirred for 120 seconds to obtain a release agent.

[0037] The release agent is evenly coated on the surface of the PET release film substrate 21 with a thickness of 150 μm, vacuum defoaming for 1 hour, N 2 The release agent layer 22 was formed after being cured by ultraviolet light irradiation for 180 seconds under certain conditions. The thickness of the release agent layer 22 was measured to be 5.5 μm.

[0038] After testing, the release agent layer 22 of this embodiment has good stability below 120°C, without decomposition and detachment, and still ...

Embodiment 3

[0040] With the polybutadiene polyurethane of 100 weight parts, the polyacrylate resin of 65 weight parts, the 1,3-dioxane of 30 weight parts, the tetramethyltetravinyl cyclotetrasiloxane of 35 weight parts, 40 Parts by weight of octadecyl methacrylate active monomer diluent, 30 parts by weight of tetrahydrofuran are uniformly mixed, adding 3 parts by weight of initiator is 2-hydroxyl-2-methyl-1-phenyl-1-propanone , magnetically stirred for 120 seconds to obtain a release agent.

[0041] The release agent is evenly coated on the surface of the PET release film substrate 21 with a thickness of 100 μm, vacuum defoaming for 1 hour, N 2 The release agent layer 22 was formed after being cured by ultraviolet light irradiation for 180 seconds under certain conditions, and the thickness of the release agent layer 22 was measured to be 3.5 μm.

[0042] After testing, the release agent layer 22 of this embodiment has good stability below 120°C, without decomposition and detachment, and...

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Abstract

The invention discloses a heavy release film for an OCA optical adhesive, wherein the heavy release film is used for being attached to one side of an OCA optical adhesive layer and clamping the OCA heavy release film layer in the middle together with a light release film on the other side, and comprises a release film base material and a release agent layer coated on the surface of the release film base material, wherein the release agent layer is prepared from an ultraviolet light curing release agent prepared from the following raw materials in parts by weight: 50-150 parts of polybutadienepolyurethane, 50-90 parts of polyacrylate resin, 20-40 parts of 1,3-dioxolane, 20-50 parts of tetramethyl tetravinyl cyclotetrasiloxane, 25-55 parts of an octadecyl methacrylate active monomer diluent, 20-40 parts of tetrahydrofuran and 1-5 parts of an initiator, namely 2-hydroxy-2-methyl-1-phenyl-1-acetone. The ultraviolet curing release agent of the heavy release film does not need high-temperature baking and can bear high-temperature treatment during OCA optical adhesive curing.

Description

technical field [0001] The present application relates to OCA optical adhesive, in particular to a release film for OCA optical adhesive, in particular to a heavy release film for OCA optical adhesive. Background technique [0002] OCA (Optically Clear Adhesive) optical adhesive, also known as OCA optical transparent adhesive, is a kind of optical double-sided laminating tape composed of optical acrylic adhesive made of no substrate and a layer of release film on the upper and lower sides. OCA optical adhesives are usually used to bond transparent optical components, such as mobile phone touch panels, lenses and related components. [0003] figure 1 A schematic structural view of an OCA optical adhesive that can be used in the present invention is shown, which includes a middle OCA optical adhesive layer 10, the upper surface of the OCA optical adhesive layer 10 is covered with a heavy release film 20, and the lower surface of the OCA optical adhesive layer 10 Covered with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09J7/40C09D175/14C09D133/04C09D5/20C08L67/02B32B27/36B32B27/06B32B33/00
CPCC08J7/0427C08J7/042C09J7/401C09J7/403C09D175/14C09D133/04C09D5/20B32B27/36B32B27/08B32B33/00C08J2367/02C08J2475/14C08J2433/04C09J2467/005B32B2255/10B32B2255/26C08L33/04C08K5/1535C08L75/14
Inventor 吴培服吴迪王琪池卫
Owner JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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