Support film for OLED module and preparation method thereof

A technology of supporting film and module, applied in the field of supporting film of OLED module and its preparation, can solve problems such as cohesion of adhesive layer, insufficient stiffness, easy deformation, etc., achieve low tearing film static voltage, and improve folding performance , the effect of high cohesion

Active Publication Date: 2021-04-20
CYBRID TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flexible substrate The substrate is relatively soft and has insufficient stiffness. It is prone to deformation during production, transportation, and assembly, which reduces the service life of the display screen.
[0003] The prior art solution is to add an antistatic agent to the high-viscosity pressure-sensitive adhesive layer of the support film to reduce the static voltage of the tear film. The addition of the antistatic agent has a great influence on the viscosity of the adhesive layer over time, which may cause the support film to be separated from the film. Insufficient adhesion of flexible substrates reduces product stability
At the same time, some high-viscosity layers, in order to improve the viscosity, will sacrifice the cohesive performance, which will cause the cohesion of the adhesive layer to be affected by the heating of the equipment during the long-term use of OLED products, affecting the bonding effect

Method used

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  • Support film for OLED module and preparation method thereof
  • Support film for OLED module and preparation method thereof
  • Support film for OLED module and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment provides a support film for an OLED module, which consists of a 50 μm antistatic PET substrate layer, a 7 μm antistatic polyurethane pressure-sensitive adhesive layer, a 75 μm double-sided antistatic PET substrate layer, and a 25 μm antistatic PET substrate layer arranged sequentially from top to bottom. Polyacrylate pressure-sensitive adhesive layer and 50μm double-sided antistatic PET release film layer.

[0056] In parts by weight, the raw material composition of the antistatic polyurethane pressure-sensitive adhesive layer includes: 100 parts of low-viscosity polyurethane adhesive (U-1401, Lion King of Japan), 0.4 part of bistrifluoromethanesulfonylimide lithium salt solution ( CF1101C, Guotai Chaowei), 10 parts of modified polyisocyanic acid (hardener N, Japan Lion King) and 150 parts of ethyl acetate. The polyurethane adhesive composition is mechanically stirred, coated on the non-antistatic surface of 50 μm antistatic PET (ST, Yangzhou Wanrun), an...

Embodiment 2

[0060] This embodiment provides a support film for an OLED module, which consists of a 50 μm antistatic PET substrate layer, a 7 μm antistatic polyurethane pressure-sensitive adhesive layer, a 75 μm double-sided antistatic composite film layer, and a 25 μm poly Acrylic pressure-sensitive adhesive layer and 50μm double-sided antistatic PET release film layer.

[0061] In parts by weight, the raw material composition of the antistatic polyurethane pressure-sensitive adhesive layer includes: 90 parts of low-viscosity polyurethane adhesive (U-1401, Lion King of Japan), 0.4 part of bistrifluoromethanesulfonylimide lithium salt solution ( CF1101C, Guotai Chaowei), 8 parts of modified polyisocyanic acid (hardener N, Japan Lion King) and 150 parts of ethyl acetate. The polyurethane adhesive composition is mechanically stirred, coated on the non-antistatic surface of 50 μm antistatic PET (ST, Yangzhou Wanrun), and after being cured in an oven, it is pasted on a 50 μm PET release film (...

Embodiment 3

[0066] This embodiment provides a support film for an OLED module, which consists of a 50 μm antistatic PET substrate layer, a 7 μm antistatic polyurethane pressure-sensitive adhesive layer, a 75 μm double-sided antistatic PET substrate layer, and a 25 μm antistatic PET substrate layer arranged sequentially from top to bottom. Polyacrylate pressure-sensitive adhesive layer and 50μm double-sided antistatic PET release film layer.

[0067] In parts by weight, the raw material composition of the antistatic polyurethane pressure-sensitive adhesive layer includes: 85 parts of low-viscosity polyurethane adhesive (U-1401, Lion King of Japan), 2 parts of bistrifluoromethanesulfonylimide lithium salt solution ( CF1101C, Guotai Chaowei), 5 parts of modified polyisocyanic acid (hardener N, Japan Lion King) and 150 parts of ethyl acetate. The polyurethane adhesive composition is mechanically stirred, coated on the non-antistatic surface of 50 μm antistatic PET (ST, Yangzhou Wanrun), and a...

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Abstract

The invention discloses a support film for an OLED module, which comprises a first substrate layer, an antistatic low-viscosity pressure-sensitive adhesive layer, a second substrate layer, a high-viscosity pressure-sensitive adhesive layer and an antistatic release film layer, and is characterized in that the antistatic low-viscosity pressure-sensitive adhesive layer and the high-viscosity pressure-sensitive adhesive layer are respectively arranged on two side surfaces of the second substrate layer; the first substrate layeris located on the side, opposite to the second substrate layer, of the antistatic low-viscosity pressure-sensitive adhesive layer, the first substrate layer and the antistatic low-viscosity pressure-sensitive adhesive layer are combined to serve as a protective film, and the antistatic release film layer is arranged on the side, opposite to the second substrate layer, of the high-viscosity pressure-sensitive adhesive layer. And the high-viscosity pressure-sensitive adhesive layer and the second substrate layer are combined to serve as a supporting film entity. The prepared supporting film has the characteristics of high viscosity, high cohesion, low film tearing voltage, no offset printing, high temperature resistance, bending resistance, high light transmittance and the like.

Description

technical field [0001] The invention belongs to the technical field of adhesive tapes for OLEDs, and in particular relates to a support film for OLED modules and a preparation method thereof. Background technique [0002] OLED is the third-generation display technology. Compared with LCD technology, OLED has realized ultra-thin display, flexible and foldable design, and has the advantages of high luminous brightness, high contrast, bright color, fast response speed, and low energy consumption. It has gradually Login display field. Flexible OLED displays are prepared using flexible substrates. It is necessary to prepare flexible substrates (such as PI substrates) on rigid substrates (such as glass), and then prepare TFT and OLED devices on flexible substrates. Finally, the flexible substrates are removed from the rigid substrates. peel off. The flexible substrate substrate is relatively soft and has insufficient stiffness. It is prone to deformation during production, trans...

Claims

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Application Information

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IPC IPC(8): C09J7/29C09J7/25C09J7/38C09J9/02C09J175/04C09J133/04
Inventor 吴林邹学良朱玲玲陈洪野吴小平
Owner CYBRID TECHNOLOGIES INC
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