Light release film for OCA

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

Active Publication Date: 2021-06-11
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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  • Light release film for OCA
  • Light release film for OCA
  • Light release film for OCA

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 for an OCA (optical clear adhesive). The light release film is used for being attached to one side of an OCA layer, the light release film and a heavy release film on the other side clamp the OCA layer in the middle, the light release film comprises a release film base material and a release agent layer which coats the surface of the release film base material, the release agent layer is prepared from a release agent, and the release agent is prepared from, by weight, 50 to 80 parts of polydimethylsiloxane, 100 to 200 parts of ethyl acetate, 10 to 20 parts of polyurethane resin, 10 to 20 parts of ethylene-vinyl acetate copolymer, 10 to 20 parts of tetramethyl tetravinyl cyclotetrasiloxane, 20 to 40 parts of tetrahydrofuran, and 10 to 20 parts by weight of a terpene resin tackifier. The release agent layer provided by the invention can obtain continuous release property by slowing down and controlling the seepage speed of the release component.

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 Applications(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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