CN221094059U - Top film of electronic paper - Google Patents

Top film of electronic paper Download PDF

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Publication number
CN221094059U
CN221094059U CN202322360251.8U CN202322360251U CN221094059U CN 221094059 U CN221094059 U CN 221094059U CN 202322360251 U CN202322360251 U CN 202322360251U CN 221094059 U CN221094059 U CN 221094059U
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China
Prior art keywords
layer
electronic paper
film
thickness
paper top
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CN202322360251.8U
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Chinese (zh)
Inventor
袁明
于佩强
吕敬波
胡业新
刘展硕
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Jiangsu Rijiu Optoelectronics Joint Stock Co ltd
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Jiangsu Rijiu Optoelectronics Joint Stock Co ltd
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Abstract

The utility model discloses an electronic paper top layer film, which comprises a substrate layer, wherein the substrate layer comprises a first surface and a second surface which are oppositely arranged; the first surface is provided with a water vapor barrier coating layer, and the second surface is sequentially provided with an anti-dazzle layer and an ultraviolet barrier layer in a lamination manner; the light transmittance of the top layer film at the wavelength of 380nm is less than 2.3%, and the average light transmittance in the wave band of 280nm-370nm is less than 1%. According to the electronic paper top layer film, the film layer structure is optimized, the film layer thickness is reasonably set, and the preparation process is simplified while good anti-dazzle performance and ultraviolet blocking performance are ensured, so that the preparation cost is reduced.

Description

Top film of electronic paper
Technical Field
The utility model relates to the technical field of electronic paper, in particular to a top film of electronic paper.
Background
The electronic paper technology has been developed rapidly in recent years by means of the unique label of paper-like display, and is a beautiful landscape in a plurality of display technologies. The application terminal of the electronic paper is mainly commercial products such as electronic tags, advertisement signs and the like, and has certain application in consumer products, and the electronic paper flat plate is an important subdivision scene.
The existing electronic paper top layer film comprises an AG anti-dazzle layer, a PET layer, an Ultraviolet (UV) blocking OCA layer, a PET layer and a water vapor blocking layer from top to bottom, and the structure has good anti-dazzle, ultraviolet (UV) blocking and waterproof effects, but has complicated preparation process due to excessive layers and high cost.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of utility model
The utility model aims to provide the electronic paper top layer film, which not only has good anti-dazzle, UV blocking and water blocking performances, but also reduces the production cost of the electronic paper top layer film by optimizing the film layer structure.
In order to achieve the above object, the present utility model provides an electronic paper top film, comprising a substrate layer, wherein the substrate layer comprises a first surface and a second surface which are oppositely arranged;
The first surface is provided with a water vapor barrier coating layer, and the second surface is sequentially provided with an anti-dazzle layer and an ultraviolet barrier layer in a lamination manner;
the light transmittance of the top layer film at the wavelength of 380nm is less than 2.3%, and the average light transmittance in the wave band of 280nm-370nm is less than 1%.
In one or more embodiments, the substrate layer is a PET substrate layer or a TAC substrate layer.
In one or more embodiments, the substrate layer is a PET substrate layer having a thickness of 50 μm or 100 μm or 125 μm or 188 μm.
In one or more embodiments, the substrate layer is a TAC substrate layer having a thickness of 60 μm or 80 μm.
In one or more embodiments, the water vapor barrier coating layer is a silicon-based oxide or silicon-based nitride or metal oxide coating layer.
In one or more embodiments, the water vapor barrier coating is an alumina coating.
In one or more embodiments, the thickness of the water vapor barrier coating layer is 100-300nm.
In one or more embodiments, the antiglare layer has a thickness of 5 to 6 μm.
In one or more embodiments, the ultraviolet blocking layer has a thickness of 500-800nm.
In one or more embodiments, the top film has a moisture barrier ratio of 5 x 10 -3g/m2*day-9*10-3 g/m2 day.
Compared with the prior art, the electronic paper top layer film has the following advantages:
According to the utility model, the film layer structure is optimized, the film layer thickness is reasonably set, and the preparation process is simplified while the good anti-dazzle performance and the ultraviolet blocking performance are ensured, so that the preparation cost is reduced.
According to the utility model, the water vapor barrier layer is a coating layer, and the vapor barrier coating layer is prepared by adopting an atomic deposition coating process, so that the vapor barrier rate of the integral top layer film is improved from 10 -2 to 10 -3 compared with the traditional vapor barrier coating layer, and the vapor barrier performance is better.
Drawings
Fig. 1 is a schematic view of an electronic paper top film according to an embodiment of the present utility model.
The main reference numerals illustrate:
1. An ultraviolet blocking layer; 2. an antiglare layer; 3. a substrate layer; 4. and (3) a water vapor barrier coating.
Detailed Description
The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
The surface of the anti-dazzle film (AG anti-dazzle) is in an uneven state, namely, the surface is provided with an uneven matte non-reflection surface, and the surface anti-dazzle film is stuck to a display device to effectively reduce the glare phenomenon of the surface, effectively prevent reflection of light and reduce the reflection problem of the display device in sunlight or the like.
As shown in fig. 1, there is provided an electronic paper top film according to the present embodiment, which includes a base material layer 3, a water vapor barrier coating layer 4, an antiglare layer 2, and an ultraviolet barrier layer 1.
Wherein, substrate layer 3 includes the first surface and the second surface that set up in opposite directions, and steam separation coating film layer 4 is located on the first surface, and antiglare layer 2 is located on the second surface, and ultraviolet barrier layer 1 locates antiglare layer 2 and deviates from one side of second surface.
The substrate layer 3 in this example is selected from a PET (polyethylene terephthalate) substrate and a TAC (triacetate fiber film) substrate.
Preferably, the substrate layer 3 is a PET substrate, the thickness of which can be chosen from 50 μm or 100 μm or 125 μm or 188 μm.
Preferably, the substrate layer 3 is a TAC substrate, the thickness of which is optionally 60 μm or 80 μm.
In this embodiment, the antiglare layer 2 and the ultraviolet barrier layer 1 are coated by a wet coating process, and as is well known, the principle of antiglare layer 2 antiglare is that uneven surfaces are formed on the surfaces of the antiglare layers by antiglare particles, and then total reflection of light is converted into diffuse reflection/scattering, so that the antiglare effect is achieved, and therefore, how to ensure that the ultraviolet barrier layer is coated on the surfaces of the antiglare layer 2 without affecting the overall antiglare effect is particularly important for this scheme, and in order to ensure the above effects, the thickness of the antiglare layer 2 is set to be 5-6 μm, and the thickness of the ultraviolet barrier layer 1 is set to be 500-800nm.
And the antiglare layer 2 is coated with an antiglare liquid, and preferably, the antiglare liquid may comprise the following raw material components in parts by mass: 70-80 parts of polyurethane resin; 5-8 parts of silica and/or zirconia particles; 0.1 to 1 part of polyether modified polydimethylsiloxane and/or polyacrylate functional group modified polydimethylsiloxane; butanone and/or methyl isobutyl ketone and/or propylene glycol methyl ether in 20-30 weight portions.
In another embodiment, the antiglare liquid may be a commercially available antiglare liquid.
Further preferably, the ultraviolet blocking layer in this embodiment is made of ultraviolet blocking liquid of model Eversorb of taiwan Yongguang company.
The vapor barrier coating layer 4 is formed by coating a layer of inorganic material on the first surface of the substrate layer 3 by physical coating (such as atomic deposition), preferably, the vapor barrier coating layer 4 is a silicon oxide (such as SiO X), silicon nitride (such as SiN X), or metal oxide (such as Al 2O3); it is further preferable that the thickness of the moisture barrier coating layer 4 is 100 to 300nm.
The electronic paper top layer film provided by the embodiment can enable the overall water vapor blocking rate to reach 10 - 3g/m2 day through the structural design, the light transmittance at the wavelength of 380nm is less than 2.3%, and the average light transmittance in the wave band of 280nm-370nm is less than 1%.
The electronic paper top film of the present utility model will be described in detail with reference to specific examples.
Example 1:
In the embodiment, a PET substrate with the thickness of 100 mu m is selected, and an anti-dazzle layer with the thickness of 5 mu m and an ultraviolet barrier layer with the thickness of 500nm are sequentially coated on the second surface of the PET substrate by adopting a precise coating process; and then plating a silicon oxide water vapor barrier coating layer with the thickness of 100nm on the first surface of the PET substrate by adopting an atomic deposition coating process.
In this embodiment, the antiglare layer is prepared by using an antiglare coating liquid, and the antiglare coating liquid mainly comprises the following raw material components:
70 parts of polyurethane acrylic resin,
6 Parts of silicon oxide particles,
0.5 Part of polyether modified polydimethylsiloxane,
10 Parts of butanone, and the mixture is prepared from the following components,
10 Parts of propylene glycol methyl ether.
Example 2:
In the embodiment, a PET substrate with the thickness of 100 mu m is selected, and an anti-dazzle layer with the thickness of 6 mu m and an ultraviolet barrier layer with the thickness of 800nm are sequentially coated on the second surface of the PET substrate by adopting a precise coating process; and then plating a silicon oxide water vapor barrier coating layer with the thickness of 300nm on the first surface of the PET substrate by adopting an atomic deposition coating process.
In this embodiment, the antiglare layer is prepared by using an antiglare coating liquid, and the antiglare coating liquid mainly comprises the following raw material components:
70 parts of polyurethane acrylic resin,
6 Parts of silicon oxide particles,
0.2 Part of poly acrylic ester functional group modified polydimethylsiloxane,
10 Parts of butanone, and the mixture is prepared from the following components,
10 Parts of propylene glycol methyl ether.
Comparative example 1:
The AG film and the water-blocking film are bonded through the ultraviolet blocking adhesive, wherein the thickness of the ultraviolet blocking adhesive layer is 50um, the thickness of the AG film is 150um, and the thickness of the water-blocking film is 80um, and the water-blocking film is prepared by coating the water-blocking layer on the PET substrate through a wet coating process.
The following performance tests were performed by the above examples 1, 2 and comparative example 1:
(1) Test haze test a haze meter was used: test reference astm d 1003 test standard.
(2) Light transmittance test the transmittance of the product was tested using a spectrophotometer test, with reference to ASTM D1003 standard.
(3) Hardness testing was tested using a graphite pencil with reference to ASTM D3363 standard.
(4) Water blocking rate test the water blocking rate of the product was tested with reference to ASTM F1249 standard using a water vapor transmission tester.
The following table data were obtained:
from the above table, it can be seen that:
The electronic paper top layer film provided by the utility model has the ultraviolet light (light with the wavelength smaller than 380 nm) transmittance smaller than 2.3 at 380nm, and has more excellent ultraviolet blocking performance compared with the traditional structure; and the water vapor permeability of the whole film layer can reach the order of 10 -3, and is particularly 0.005-0.009g/m 2 day.
Meanwhile, the utility model also has higher hardness and wear resistance.
The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims (9)

1. The electronic paper top layer film is characterized by comprising a substrate layer, wherein the substrate layer comprises a first surface and a second surface which are oppositely arranged;
The first surface is provided with a water vapor barrier coating layer, and the second surface is sequentially provided with an anti-dazzle layer and an ultraviolet barrier layer in a lamination manner;
The light transmittance of the top layer film at the wavelength of 380nm is less than 2.3%, and the average light transmittance in the wave band of 280nm-370nm is less than 1%;
the water vapor barrier rate of the top layer film is 5 x 10 -3g/m2*day-9*10-3g/m2 x day.
2. The electronic paper top film of claim 1, wherein the substrate layer is a PET substrate layer or a TAC substrate layer.
3. The electronic paper top film according to claim 2, wherein the substrate layer is a PET substrate layer having a thickness of 50 μm or 100 μm or 125 μm or 188 μm.
4. The electronic paper top film according to claim 2, wherein the substrate layer is a TAC substrate layer having a thickness of 60 μm or 80 μm.
5. The electronic paper top film of claim 1, wherein the moisture barrier coating layer is a silicon-based oxide or silicon-based nitride or metal oxide coating layer.
6. The electronic paper top film of claim 5, wherein the moisture barrier coating layer is an alumina coating layer.
7. The electronic paper top film according to claim 5, wherein the thickness of the water vapor barrier coating layer is 100-300nm.
8. The electronic paper top film according to claim 1, wherein the antiglare layer has a thickness of 5 to 6 μm.
9. The electronic paper top film of claim 1, wherein the ultraviolet blocking layer has a thickness of 500-800nm.
CN202322360251.8U 2023-08-31 2023-08-31 Top film of electronic paper Active CN221094059U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322360251.8U CN221094059U (en) 2023-08-31 2023-08-31 Top film of electronic paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322360251.8U CN221094059U (en) 2023-08-31 2023-08-31 Top film of electronic paper

Publications (1)

Publication Number Publication Date
CN221094059U true CN221094059U (en) 2024-06-07

Family

ID=91302976

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322360251.8U Active CN221094059U (en) 2023-08-31 2023-08-31 Top film of electronic paper

Country Status (1)

Country Link
CN (1) CN221094059U (en)

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