CN109940948B - Flexible cover plate, display device and preparation method of flexible cover plate - Google Patents

Flexible cover plate, display device and preparation method of flexible cover plate Download PDF

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Publication number
CN109940948B
CN109940948B CN201910250671.6A CN201910250671A CN109940948B CN 109940948 B CN109940948 B CN 109940948B CN 201910250671 A CN201910250671 A CN 201910250671A CN 109940948 B CN109940948 B CN 109940948B
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flexible
inorganic material
layer
material layer
polymer film
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CN109940948A (en
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时永祥
蔡宝鸣
卜德军
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/067—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/841—Self-supporting sealing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/206—Organic displays, e.g. OLED
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Abstract

The embodiment of the invention provides a flexible cover plate and a preparation method of the flexible cover plate, wherein the flexible cover plate comprises the following components: a hardened layer, a polymer film and a flexible inorganic material layer; the polymer film is disposed between the hardened layer and the flexible inorganic material layer. The flexible inorganic material layer in the embodiment of the invention has good resilience hardness, and can improve the resilience and hardness of the flexible cover plate.

Description

Flexible cover plate, display device and preparation method of flexible cover plate
Technical Field
The invention relates to the technical field of display, in particular to a flexible cover plate, a display device and a preparation method of the flexible cover plate.
Background
The market share of the bendable display product is getting larger and larger, and the bendable display product depends on an Organic Light Emitting Diode (OLED) display device and can realize the crimpability and the foldability. The folding radius of the folded product is required to reach 1mm, and the folded product has higher bending resistance requirements on the light-emitting device and has higher bending resistance requirements on module materials of the display device, such as a polarizer, a cover plate and the like.
At present, a display cover plate is generally formed by adopting a structure of a flexible film and a hardened layer, and the display cover plate has the problems of low hardness, poor resilience and impact resistance of the cover plate and incapability of meeting the use requirement on the ball-and-pen-dropping performance.
Disclosure of Invention
The invention provides a flexible cover plate, which aims to solve the problem that the existing flexible cover plate is poor in resilience and impact resistance.
A first aspect of the present invention provides a flexible cover sheet comprising: a hardened layer, a polymer film, and a flexible inorganic material layer;
the polymer film is disposed between the hardened layer and the flexible inorganic material layer.
Optionally, a first orthographic projection of the flexible inorganic material layer on a horizontal plane where the polymer film is located in the polymer film, a buffer material is arranged around the periphery of the flexible inorganic material layer, and the buffer material is attached to the polymer film.
Optionally, a gap with a size range of 0.05mm-0.4mm is arranged between the buffer material and the flexible inorganic material layer.
Optionally, the flexible inorganic material layer is flexible glass, and the thickness of the flexible glass includes: 30-100 μm.
Optionally, the material of the polymer film includes: one or more of polyimide, poly terephthalic acid, polyethylene naphthalate, polymethyl methacrylate, polyurethane and aramid fiber.
Optionally, the thickness of the polymer film comprises: 30-100 μm.
Optionally, the material of the hardened layer includes: the thickness of the hardened layer ranges from 5 mu m to 20 mu m.
Optionally, the flexible inorganic layer is attached to the polymer film through an optical adhesive layer.
Optionally, the material of the optical adhesive layer includes: one or more of organic silicon rubber, acrylic resin, unsaturated polyester, polyurethane and epoxy resin.
A second aspect of the invention provides a display device comprising a flexible cover sheet as described in any of the above.
Optionally, the peripheral size of the flexible inorganic material layer is greater than the size of an effective display area of the display device, a second orthographic projection of the effective display area on a horizontal plane where the flexible inorganic material layer is located in the flexible inorganic material layer, and a distance between an outer edge of the second orthographic projection and an outer edge of the inorganic material layer is 0.2mm to 0.5 mm.
The third aspect of the present invention provides a method for manufacturing a flexible cover plate, including:
coating an optical adhesive layer on one side of the release film;
attaching a polymer film to one side of the optical adhesive layer, which is far away from the release film;
and removing the release film, and attaching a flexible inorganic material layer to one side of the optical adhesive layer, which is far away from the polymer film.
Optionally, removing the release film, and attaching a flexible inorganic material layer to a side of the optical adhesive layer away from the polymer film, includes:
and removing the middle area of the release film, and attaching a flexible inorganic material layer to the middle area.
Optionally, the method further includes:
and removing the edge area of the release film, and attaching a buffer material to the edge area, wherein the buffer material surrounds the flexible inorganic material layer, and a gap is formed between the buffer material and the flexible inorganic material layer.
Optionally, the method further includes:
and forming a hardened layer on one side of the polymer film, which is far away from the optical adhesive layer.
The embodiment of the invention provides a flexible cover plate, which comprises: a hardened layer, a polymer film, and a flexible inorganic material layer; the polymer film is disposed between the stiffening layer and the flexible inorganic material layer. In the embodiment of the invention, the flexible inorganic material layer has good resilience hardness, and the resilience and hardness of the flexible cover plate can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a flexible cover plate according to an embodiment of the present invention;
FIG. 2 is a schematic plan view of a flexible inorganic material layer and a buffer material according to an embodiment of the present invention;
fig. 3 is a schematic plan view of a flexible inorganic material layer and a display region according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a method for manufacturing a flexible cover plate according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a method for manufacturing a flexible cover plate according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, there is provided a flexible cover sheet including: a hardened layer 10, a polymer film 20, and a flexible inorganic material layer 30; the polymer thin film 20 is disposed between the hardened layer 10 and the flexible inorganic material layer 30.
In the embodiment of the present invention, a first orthographic projection of the flexible inorganic material layer 30 on a horizontal plane of the polymer film 20 is located in the polymer film 20, a buffer material 40 is disposed around a periphery of the flexible inorganic material layer 30, and the buffer material 40 is attached to the polymer film 20.
In the embodiment of the present invention, referring to fig. 2, the buffer material 40 surrounds the flexible inorganic material 30, and the buffer material 40 can protect the flexible inorganic material 30 when the flexible cover sheet is dropped.
In an embodiment of the invention, the width of the cushioning material is in the range of 0.5mm to 10mm, preferably 2 mm.
Referring to fig. 2, a gap a having a size ranging from 0.05mm to 0.4mm is provided between the buffer material and the flexible inorganic material layer. The gap a is preferably 0.2mm, and the gap a also serves to cushion the impact.
In an embodiment of the present invention, the flexible inorganic material layer is flexible glass, and the thickness of the flexible glass includes: 30-100 μm. Wherein, the flexible glass is transparent glass, has higher recovery performance and extensibility, and the thickness of the flexible glass is preferably 70 μm.
In an embodiment of the present invention, the material of the polymer film includes: one or more of polyimide, poly terephthalic acid, polyethylene naphthalate, polymethyl methacrylate, polyurethane and aramid fiber. Wherein, the buffer material can also be selected from one or more of polyimide, polyterephthalic acid, polyethylene naphthalate, polymethyl methacrylate, polyurethane and aramid fiber.
In an embodiment of the present invention, the thickness of the polymer film comprises: 30-100 μm; among them, the thickness of the polymer film is preferably 80 μm.
In an embodiment of the present invention, the material of the hardened layer includes: the thickness of the hardened layer ranges from 5 micrometers to 20 micrometers, wherein the thickness of the hardened layer is preferably 10 micrometers.
In the present embodiment, the flexible inorganic layer is attached to the polymer film by an optical adhesive layer 50.
In an embodiment of the present invention, the material of the optical adhesive layer includes: one or more of organic silicon rubber, acrylic resin, unsaturated polyester, polyurethane and epoxy resin.
The embodiment of the invention also provides a display device which comprises the flexible cover plate.
Referring to fig. 3, the peripheral dimension of the flexible inorganic material layer 30 is greater than the effective display area dimension B of the display device, and a second orthographic projection of the effective display area on the horizontal plane of the flexible inorganic material layer is located in the flexible inorganic material layer, and the distance between the outer edge of the second orthographic projection and the outer edge of the inorganic material layer is 0.2mm to 0.5 mm; wherein the distance is preferably 0.3 mm.
In the embodiment of the present invention, referring to table one, the test results of the flexible cover plate in the embodiment of the present invention are listed, and it can be seen that the flexible cover plate in the embodiment of the present invention has very good impact resistance.
Figure GDA0003287956540000051
Watch 1
The embodiment of the invention provides a flexible cover plate, which comprises: a hardened layer, a polymer film and a flexible inorganic material layer; the polymer film is disposed between the hardened layer and the flexible inorganic material layer. The flexible inorganic material layer in the embodiment of the invention has good recovery performance and hardness, and the recovery performance and hardness of the flexible cover plate can be improved.
Example two
Referring to fig. 4, an embodiment of the present invention provides a method for manufacturing a flexible cover plate, including:
in step 201, referring to fig. 5 (a), an optical adhesive layer 50 is coated on one side of a release film 60.
In the embodiment of the present invention, the material of the release film 60 includes: poly (terephthalic acid) or polyethylene.
In step 202, referring to fig. 5 (a), a polymer film 20 is attached to a side of the optical adhesive layer 50 away from the release film 60.
Step 203, removing the release film 60, and attaching a flexible inorganic material layer 30 to a side of the optical adhesive layer 50 away from the polymer film 20.
In the embodiment of the invention, a laser area release film can be adopted.
In this embodiment of the present invention, step 203 includes:
and removing the middle area of the release film, and attaching a flexible inorganic material layer to the middle area.
Referring to fig. 5 (b), the middle region of the release film 60 is removed along the direction of arrow X, so as to obtain the release film of the edge region in fig. 5 (c); referring to fig. 5 (d), a flexible inorganic material layer 30 is attached to the intermediate region.
Wherein, step 203, further comprises:
referring to fig. 5 (e) and 5 (f), removing an edge region of the release film, and attaching a buffer material to the edge region, wherein the buffer material is disposed around the flexible inorganic material layer with a gap therebetween.
In the embodiment of the present invention, after step 203, the method further includes:
referring to fig. 1, a hardened layer is formed on a side of the polymer film away from the optical adhesive layer.
In the embodiment of the present invention, materials and structures of the polymer film, the flexible inorganic material layer, the optical adhesive layer, the buffer layer and the hardened layer are referred to the first embodiment, and are not described herein again.
In summary, the flexible cover plate prepared by the preparation method of the embodiment of the invention includes: a hardened layer, a polymer film, and a flexible inorganic material layer; the polymer film is disposed between the hardened layer and the flexible inorganic material layer. The flexible inorganic material layer in the embodiment of the invention has good resilience hardness, and can improve the resilience and hardness of the flexible cover plate.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (12)

1. A flexible cover sheet, comprising: a hardened layer, a polymer film, and a flexible inorganic material layer;
the polymer film is disposed between the stiffening layer and the flexible inorganic material layer;
wherein the flexible inorganic material layer is flexible glass, and the thickness of the flexible glass comprises: 30-100 μm;
the material of the polymer film comprises: one or more of polyimide, poly terephthalic acid, polyethylene naphthalate, polymethyl methacrylate, polyurethane and aramid fiber;
the material of the hardened layer includes: a silicone polymer and/or an acrylic polymer.
2. The flexible cover sheet according to claim 1, wherein a first orthographic projection of the flexible inorganic material layer on a horizontal plane of the polymer film is located in the polymer film, and a buffer material is arranged around the periphery of the flexible inorganic material layer and attached to the polymer film.
3. The flexible cover sheet of claim 2, wherein the buffer material and the flexible inorganic material layer have a gap therebetween in the size range of 0.05mm to 0.4 mm.
4. The flexible cover sheet of claim 1, wherein the thickness of the polymer film comprises: 30-100 μm.
5. The flexible cover sheet of claim 1, wherein the hardened layer has a thickness in the range of 5 μm to 20 μm.
6. The flexible cover sheet of any one of claims 1 to 5, wherein the flexible inorganic layer is attached to the polymer film by an optical glue layer.
7. The flexible cover sheet of claim 6 wherein the material of the optical glue layer comprises: one or more of organic silicon rubber, acrylic resin, unsaturated polyester, polyurethane and epoxy resin.
8. A display device comprising the flexible cover sheet according to any one of claims 1 to 7.
9. The display device according to claim 8, wherein the flexible inorganic material layer has a peripheral dimension larger than an effective display area dimension of the display device, and a second orthographic projection of the effective display area on a horizontal plane where the flexible inorganic material layer is located within the flexible inorganic material layer, and an outer edge of the second orthographic projection is 0.2mm to 0.5mm from an outer edge of the inorganic material layer.
10. A method for preparing a flexible cover plate is characterized by comprising the following steps:
coating an optical adhesive layer on one side of the release film;
attaching a polymer film to one side of the optical adhesive layer, which is far away from the release film;
removing the release film, and attaching a flexible inorganic material layer to one side of the optical adhesive layer, which is far away from the polymer film;
forming a hardening layer on one side of the polymer film far away from the optical adhesive layer;
wherein the flexible inorganic material layer is flexible glass, and the thickness of the flexible glass comprises: 30-100 μm;
the material of the polymer film comprises: one or more of polyimide, poly terephthalic acid, polyethylene naphthalate, polymethyl methacrylate, polyurethane and aramid fiber;
the material of the hardened layer includes: a silicone polymer and/or an acrylic polymer.
11. The method of claim 10, wherein removing the release film and attaching a flexible inorganic material layer to a side of the optical adhesive layer away from the polymer film comprises:
and removing the middle area of the release film, and attaching a flexible inorganic material layer to the middle area.
12. The method of claim 11, further comprising:
and removing the edge area of the release film, and attaching a buffer material to the edge area, wherein the buffer material surrounds the flexible inorganic material layer, and a gap is formed between the buffer material and the flexible inorganic material layer.
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