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A kind of PU protective film for oled thin film encapsulation process and preparation method thereof

A technology of film encapsulation and protective film, which is applied in the direction of film/sheet release liner, film/sheet adhesive, semiconductor/solid device manufacturing, etc., to achieve low tearing voltage, stable viscosity, and stable over time Effect

Active Publication Date: 2021-11-09
CYBRID TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current technology is difficult to take into account the balance of low tear film voltage, no glue residue, thick coating and low viscosity, etc. The present invention can achieve the balance of all performances

Method used

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  • A kind of PU protective film for oled thin film encapsulation process and preparation method thereof
  • A kind of PU protective film for oled thin film encapsulation process and preparation method thereof
  • A kind of PU protective film for oled thin film encapsulation process and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 As shown, this embodiment is a PU protective film, which consists of a substrate layer, an adhesive layer and a release layer from top to bottom. The substrate layer is single-sided antistatic PET with a thickness of 75 μm, the thickness of the adhesive layer is 75 μm, and the release layer is a silicone double-sided antistatic release film with a thickness of 25 μm.

[0046] The preparation method of PU protective film comprises the steps:

[0047] S1: Polyurethane resin preparation: polyether polyol (Dow, model 2000LM), polycarbonate polyol (Ube Chemical, model PH100D), polyester polyol (Asahikawa Chemical, model XCP 1000N) are polymerized, and the quality of the feed The ratio is 20:70:10, the polymerization method refers to the summary of the invention, and ethyl acetate is used to make a masterbatch with a solid content of 70%;

[0048] S2: Take 100g of the masterbatch prepared in step S1, add 40g of polyurethane monomer (polycarbonate polyol, Ube ...

Embodiment 2

[0051] like figure 1 As shown, this embodiment is a PU protective film, which consists of a substrate layer, an adhesive layer and a release layer from top to bottom. The substrate layer is single-sided antistatic PET with a thickness of 75 μm, the thickness of the adhesive layer is 75 μm, and the release layer is a silicone double-sided antistatic release film with a thickness of 25 μm.

[0052] The preparation method of PU protective film comprises the steps:

[0053] S1: Polyurethane resin preparation: polyether polyol (Dow, model 2000LM), polycarbonate polyol (Ube Chemical, model PH 100D), polyester polyol (Asahikawa Chemical, model XCP1000N) are polymerized, and the quality of the feed The ratio is 20:70:10, the polymerization method refers to the summary of the invention, and ethyl acetate is used to make a masterbatch with a solid content of 70%;

[0054] S2: Take 100g of the masterbatch prepared in step S1, add 40g of polyurethane monomer (polyether polyol, Dow, mode...

Embodiment 3

[0057] like figure 1 As shown, this embodiment is a PU protective film, which consists of a substrate layer, an adhesive layer and a release layer from top to bottom. The substrate layer is single-sided antistatic PET with a thickness of 75 μm, the thickness of the adhesive layer is 75 μm, and the release layer is a silicone double-sided antistatic release film with a thickness of 25 μm.

[0058] The preparation method of PU protective film comprises the steps:

[0059] S1: Polyurethane resin preparation: polyether polyol (Dow, model 2000LM), polycarbonate polyol (Ube Chemical, model PH100D), polyester polyol (Asahikawa Chemical, model XCP 1000N) are polymerized, and the quality of the feed The ratio is 30:60:10, the polymerization method refers to the summary of the invention, and ethyl acetate is used to make a masterbatch with a solid content of 70%;

[0060] S2: Take 100g of the masterbatch prepared in step S1, add 40g of polyurethane monomer (polycarbonate polyol, Shang...

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Abstract

The invention relates to a PU protective film for OLED thin film encapsulation process, which comprises a substrate layer, an adhesive layer arranged on the substrate layer, and the adhesive layer of the adhesive layer is calculated by weight percentage. The following raw material components are included: 40-60% of polyurethane resin; 5-35% of polyurethane monomer; 10-20% of curing agent; 5-15% of auxiliary agent. The adhesive layer of the protective film of the present invention has the advantages of thick coating and low viscosity, stable viscosity over time, low tearing voltage, no adhesive residue, no carbonization after laser cutting, etc., and can meet the requirements of OLED manufacturing process.

Description

technical field [0001] The invention relates to a PU protective film for an OLED thin film encapsulation process and a preparation method thereof. Background technique [0002] The OLED thin film packaging process involves evaporation or spraying of a water-repellent coating (organic-inorganic layer), and then cutting of the OLED screen. In order to protect the water-blocking coating from being damaged during the cutting process, the coating of the screen body (ie TFE) will be protected with a protective film before cutting, and the protective film will be torn off during subsequent production. Therefore, the protective film is required to have low viscosity, if the viscosity is greater than 2g / 25mm, it will cause damage to the TFE coating. All cut screens will not be used immediately and need to be stored for use when needed. Therefore, the viscosity of the protective film is required to be relatively stable, and the viscosity will not increase too much with the prolongat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/25C09J7/30C09J7/40C09J175/04H01L51/56
CPCC09J7/255C09J7/30C09J7/40C09J175/04C09J2467/006C09J2203/326C09J2301/122H10K71/00
Inventor 李阜阳周琪权朱玲玲陈洪野吴小平
Owner CYBRID TECHNOLOGIES INC
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