A light release film for oca optical glue

A technology of light release and release film, which is applied in the field of OCA optical adhesive, can solve the problems of unavailable OCA optical adhesive light release film, unclear explanation of release force, and no detailed explanation, etc.

Active Publication Date: 2022-04-22
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
Thereby, through this prior art, those skilled in the art also cannot obtain the light release film that can be used for OCA optical glue

Method used

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  • A light release film for oca optical glue
  • A light release film for oca optical glue
  • A light release film for oca optical glue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 10 parts by weight of polyurethane resin and 10 parts by weight of ethylene-vinyl acetate copolymer into 100 parts by weight of ethyl acetate and stir for 20 to 30 minutes; then add 50 parts by weight of polydimethylsiloxane, 10 parts by weight Tetramethyltetravinylcyclotetrasiloxane and 20 parts by weight of tetrahydrofuran were stirred for 10 to 15 minutes; finally, 10 parts by weight of terpene resin tackifier was added and stirred for 10 minutes to obtain a release agent.

[0027] The release agent is evenly applied to the surface of the PET release film substrate 31 with a thickness of 15 μm, cured at 110° C. for 180 seconds, and the release agent layer 32 is formed after curing. The thickness of the release agent layer 32 is measured to be 2 μm.

[0028] After testing, the release agent layer 32 of this embodiment has good stability in the range of 120° C. to 250° C. without decomposition or detachment, and the release agent layer begins to decompose and detach...

Embodiment 2

[0030] Add 20 parts by weight of polyurethane resin and 20 parts by weight of ethylene-vinyl acetate copolymer into 200 parts by weight of ethyl acetate and stir for 20 to 30 minutes; then add 80 parts by weight of polydimethylsiloxane, 20 parts by weight Tetramethyltetravinylcyclotetrasiloxane and 40 parts by weight of tetrahydrofuran were stirred for 10 to 15 minutes; finally, 20 parts by weight of terpene resin tackifier was added and stirred for 10 minutes to obtain a release agent.

[0031] The release agent is evenly applied to the surface of the PET release film substrate 31 with a thickness of 30 μm, cured at 105° C. for 180 seconds, and the release agent layer 32 is formed after curing. The thickness of the release agent layer 32 is measured to be 6 μm.

[0032] After testing, the release agent layer 32 of this embodiment has good stability in the range of 120° C. to 250° C. without decomposition or detachment, and the release agent layer begins to decompose and detach w...

Embodiment 3

[0034] Add 15 parts by weight of polyurethane resin and 15 parts by weight of ethylene-vinyl acetate copolymer into 150 parts by weight of ethyl acetate and stir for 20 to 30 minutes; then add 65 parts by weight of polydimethylsiloxane, 15 parts by weight Tetramethyltetravinylcyclotetrasiloxane and 30 parts by weight of tetrahydrofuran were stirred for 10 to 15 minutes; finally, 15 parts by weight of terpene resin tackifier was added and stirred for 10 minutes to obtain a release agent.

[0035] The release agent is evenly applied to the surface of the PET release film substrate 31 with a thickness of 25 μm, cured at 110° C. for 180 seconds, and the release agent layer 32 is formed after curing. The thickness of the release agent layer 32 is measured to be 5 μm.

[0036] After testing, the release agent layer 32 of this embodiment has good stability in the range of 120° C. to 250° C. without decomposition or detachment, and the release agent layer begins to decompose and detach...

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Abstract

The invention discloses a light release film used for OCA optical glue, which is used to be attached to one side of the OCA optical glue layer, and together with the heavy release film on the other side to clamp the OCA optical glue layer in the middle, The light release film includes a release film substrate and a release agent layer coated on the surface of the release film substrate, wherein the release agent layer is a release agent prepared from the following raw materials in parts by weight Preparation: 50-80 parts by weight of polydimethylsiloxane, 100-200 parts by weight of ethyl acetate, 10-20 parts by weight of polyurethane resin, 10-20 parts by weight of ethylene-vinyl acetate copolymer, 10-20 parts by weight of tetramethyl tetravinyl cyclotetrasiloxane, 20-40 parts by weight of tetrahydrofuran, and 10-20 parts by weight of terpene resin tackifier. The release agent layer of the present invention can obtain continuous release properties by slowing down and controlling the oozing speed of the release components.

Description

technical field [0001] The present application relates to OCA optical glue, in particular to a release film for OCA optical glue, in particular to a light release film for OCA optical glue. 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 a light rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B27/06B32B33/00B32B37/00B32B38/00C09D183/04C09D175/04C09D123/08C09D5/20C09D11/08C09D11/06C09J7/40
CPCB32B27/36B32B27/08B32B33/00B32B37/00B32B38/00C09D183/04C09D5/20C09D11/08C09D11/06C09J7/401C09J7/403B32B2037/243B32B2255/10B32B2255/26B32B2038/0076C08L75/04C08L23/0853C08L45/00C08K5/549C08K5/1525
Inventor 吴培服吴迪王琪池卫
Owner JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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