CN117264547A - Flexible electrochromic film interlayer and preparation process thereof - Google Patents

Flexible electrochromic film interlayer and preparation process thereof Download PDF

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Publication number
CN117264547A
CN117264547A CN202311386883.XA CN202311386883A CN117264547A CN 117264547 A CN117264547 A CN 117264547A CN 202311386883 A CN202311386883 A CN 202311386883A CN 117264547 A CN117264547 A CN 117264547A
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film
flexible
electrochromic
electrochromic film
electronic device
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陈坤宇
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Shenzhen Guangyi Tech Co Ltd
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Shenzhen Guangyi Tech Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C09J123/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J129/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
    • C09J129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/10—Homopolymers or copolymers of methacrylic acid esters
    • C09J133/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/35—Heat-activated
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention provides a flexible electrochromic film interlayer and a preparation process thereof. The flexible electrochromic film interlayer includes: the device comprises an electrochromic film, adhesive films arranged on one side or two sides of the electrochromic film, and a release film optionally arranged on the outer side of the adhesive films; the electrochromic film and the adhesive film or the composite film of the electrochromic film and the adhesive film and the release film are rolled to obtain a flexible electrochromic film intermediate layer; wherein the adhesive film is a pressure-sensitive adhesive film and the rolling temperature is 18-90 ℃, or the adhesive film is a hot melt adhesive film and the rolling temperature is 18-160 ℃. The flexible electrochromic film interlayer provided by the invention can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, and improve the production efficiency of downstream products.

Description

Flexible electrochromic film interlayer and preparation process thereof
The patent application of the invention is a divisional application based on China patent application with the application number of 202010127248.X, the application date of which is 2020, 2 and 28, and the invention name of which is a flexible electronic device interlayer and a preparation process thereof.
Technical Field
The invention belongs to the technical field of flexible electronic devices, and particularly relates to a flexible electronic device interlayer and a preparation process thereof.
Background
With development of electronic information technology, flexible intelligent devices are becoming mainstream of current intelligent devices, such as flexible electronic devices including flexible solar cells, flexible thin film batteries, flexible thin film capacitors, flexible OLEDs, flexible electronic writing papers, flexible thin film sensors, flexible thermochromic thin films, flexible photochromic thin films, and flexible electrochromic thin films. Taking flexible electrochromic films as an example, the market demand for smart devices is growing. Electrochromic refers to a phenomenon in which optical properties (reflectivity, transmittance, absorptivity, etc.) of a material change steadily and reversibly under the action of an applied electric field, and is represented by reversible changes in color and/or transparency in appearance. Materials having electrochromic properties are referred to as electrochromic materials, and devices made from electrochromic materials are referred to as electrochromic devices. Currently, electrochromic devices which are already industrialized comprise electrochromic intelligent dimming glass, electrochromic displays, automatic anti-dazzle rearview mirrors of automobiles and the like, and have huge application markets in the fields of automobiles, airplanes, intelligent buildings and the like. Emerging flexible thin film electrochromic devices are becoming a hotspot for research. The flexible electrochromic film has the advantages of simple processing technology, controllable cost and the like, can be manufactured by using roll-to-roll, and is convenient for mass production.
However, in the existing packaging technology of the flexible electrochromic film, the flexible electrochromic film is generally based on a sheet type flexible electrochromic film, and a layer of glue, a layer of electrochromic film and a layer of glue are laminated and laminated on a carrier such as glass. The process is complicated, the mass production efficiency is low, the error in lamination is large, and a large amount of manpower and material resources are required. In addition, the common base material of the flexible electrochromic film is flexible material, and before the flexible electrochromic film is packaged, the flexible electrochromic film is easy to scratch and deform in the process of storage and transportation, and is also easy to be influenced by ultraviolet rays, water, oxygen and the like when being exposed in the air. The existing flexible electrochromic film is not easy to store, is cumbersome to package and is not suitable for being directly sold as a product. Also, the above-mentioned drawbacks exist in other flexible electronic devices.
Therefore, in order to remedy the above-mentioned drawbacks, a new product capable of protecting flexible electronic devices and improving packaging efficiency has been studied.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a flexible electronic device interlayer and a preparation process thereof. The intermediate layer of the flexible electronic device provided by the invention can protect the flexible electronic device, and avoid the flexible electronic device from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes. The preparation process provided by the invention can be used for efficiently producing the intermediate layer of the flexible electronic device, improves the production efficiency of downstream products, reduces the risk of the production process, increases the flexibility, does not change the existing packaging equipment, process and operation method, and is convenient for popularization and application.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a flexible electronic device interlayer comprising: the flexible electronic device comprises a flexible electronic device, adhesive films arranged on one side or two sides of the flexible electronic device, and release films optionally arranged on the outer sides of the adhesive films.
The flexible electronic device comprises flexible solar cells, flexible thin film batteries, flexible thin film capacitors, flexible OLED, flexible electronic writing paper, flexible thin film sensors, flexible thermochromic thin films, flexible photochromic thin films, flexible electrochromic thin films and other flexible electronic devices needing to be packaged. For convenience of explanation, the flexible electronic device takes a flexible electrochromic film as an example, and the structure and the preparation process of the intermediate layer of the flexible electronic device are described in detail; it is understood that the structure and the preparation process of the intermediate layer of other flexible electronic devices are similar to those of the intermediate layer, and the invention is not repeated herein, but all the intermediate layers are included in the protection scope of the invention. Specifically, the flexible electrochromic film refers to a flexible electrochromic device film, and includes a multi-layer structure such as a substrate, a conductive layer, an electrochromic layer, an electrolyte layer, an ion storage layer, and the like.
The "release film optionally disposed outside the adhesive film" means that the release film may be disposed outside the adhesive film, or may not be disposed. The outer side of the adhesive film refers to the side of the adhesive film far away from the flexible electrochromic film. In the art, a common intermediate layer (interlayer) generally refers to a glue film, and in the invention, when the flexible electronic device is a flexible electrochromic film, the provided product has an electrochromic function and can be used like the glue film, and can be called as a flexible electrochromic intermediate layer; when the flexible electronic device is other of the above listed devices, such as a flexible solar cell, it may be referred to as a flexible solar cell interlayer. Thus, for the various types of flexible electronic devices listed above in the present invention, the products provided by the present invention are collectively referred to as flexible electronic device interlayers.
In the invention, when the two sides of the flexible electronic device are provided with the adhesive films, the adhesive films at the two sides are mutually independent and can be the same or different; the outer sides of the adhesive films on the two sides can be independently provided or not provided with release films. Specifically, taking a flexible electronic device as a flexible electrochromic film as an example, the intermediate layer of the flexible electronic device provided by the invention comprises the following five structures:
In one embodiment of the invention, the flexible electronic device interlayer comprises: the flexible electrochromic film and the adhesive film arranged on one side of the flexible electrochromic film.
In one embodiment of the invention, the flexible electronic device interlayer comprises: the flexible electrochromic film comprises a flexible electrochromic film, a glue film arranged on one side of the flexible electrochromic film and a release film arranged on the outer side of the glue film.
In one embodiment of the invention, the flexible electronic device interlayer comprises: the flexible electrochromic device comprises a flexible electrochromic film, and a first adhesive film and a second adhesive film which are respectively arranged on two sides of the flexible electrochromic film.
In one embodiment of the invention, the flexible electronic device interlayer comprises: the flexible electrochromic device comprises a flexible electrochromic film, a first adhesive film, a second adhesive film and a first release film, wherein the first adhesive film and the second adhesive film are respectively arranged on two sides of the flexible electrochromic film, and the first release film is arranged on the outer side of the first adhesive film.
In one embodiment of the invention, the flexible electronic device interlayer comprises: the flexible electrochromic film, set up respectively in flexible electrochromic film's both sides first glued membrane and second glued membrane, and set up in the first from the type membrane in the first glued membrane outside and set up in the second from the type membrane in the second glued membrane outside. Typically, the flexible electronics intermediate layer adopts this structure.
When the flexible electronic device in the prior art, such as an electrochromic film, is applied to downstream products, double-sided laminating is required layer by layer, sheet by sheet, a large amount of manpower and material resources are required to be consumed, and the production efficiency is low; meanwhile, the electrochromic film is easy to scratch and deform in the process of storage and transportation, is easily influenced by ultraviolet rays, water, oxygen and the like, and is difficult to store, cumbersome to package and not suitable to be directly sold as a product.
The intermediate layer of the flexible electronic device provided by the invention is an intermediate product for preparing a packaged flexible electronic device product, can protect the electrochromic film, and can prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes. When the flexible electronic device interlayer is used, the release film is removed (if the release film exists), the conventional common interlayer can be directly replaced to be compounded with the glass and other shell materials, and the packaged electrochromic device product is prepared, so that the conventional packaging equipment, process and operation method are not changed, and the popularization and application are convenient; compared with the traditional independent sheet electrochromic film, in the process of directly preparing electrochromic laminated glass by using the flexible electronic device interlayer, the lamination is not required to be placed layer by layer, so that the production efficiency of downstream products is improved. Similarly, for other flexible electronic devices, such as flexible solar cells, flexible thin film batteries, flexible thin film capacitors, flexible OLED, flexible electronic writing paper, flexible thin film sensors, flexible thermochromic thin films, flexible photochromic thin films and other flexible electronic devices needing packaging, the intermediate layer of the flexible electronic device provided by the invention can also protect the flexible electronic devices packaged in the intermediate layer.
In one embodiment of the present invention, the thickness of the flexible electronic device is 10-10000 μm, for example, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 150 μm, 180 μm, 200 μm, 220 μm, 250 μm, 280 μm, 300 μm, 320 μm, 350 μm, 380 μm, 400 μm, 450 μm, 500 μm, 550 μm, 600 μm, 650 μm, 700 μm, 750 μm, 800 μm, 850 μm, 900 μm, 950 μm, 1000 μm, 2000 μm, 3000 μm, 5000 μm, 8000 μm or 10000 μm, etc.; further preferably 100 to 400. Mu.m.
In one embodiment of the present invention, the thickness of the adhesive film is 10 to 3000 μm, for example, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 150 μm, 180 μm, 200 μm, 220 μm, 250 μm, 280 μm, 300 μm, 320 μm, 350 μm, 380 μm, 400 μm, 450 μm, 500 μm, 550 μm, 600 μm, 650 μm, 700 μm, 750 μm, 760 μm, 800 μm, 850 μm, 900 μm, 950 μm, 1000 μm, 1200 μm, 1500 μm, 1800 μm, 2000 μm, 2200 μm, 2500 μm, 2800 μm or 3000 μm, etc.; further preferably 100 to 400. Mu.m.
In the invention, when the two sides of the flexible electronic device are provided with the adhesive films, the adhesive films at the two sides are mutually independent, and the thickness, the material and the like of the adhesive films can be the same or different.
In one embodiment of the present invention, the thickness of the release film is 1000 μm or less, for example, 1000 μm, 900 μm, 800 μm, 700 μm, 600 μm, 500 μm, 400 μm, 380 μm, 350 μm, 320 μm, 300 μm, 280 μm, 250 μm, 220 μm, 200 μm, 180 μm, 150 μm, 120 μm, 100 μm, 90 μm, 80 μm, 70 μm, 50 μm, or the like; more preferably 200 μm or less.
In an embodiment of the invention, a width of the adhesive film is greater than or equal to a width of the flexible electronic device.
By using a wider adhesive film, a sealing section can be arranged at the edge of the middle layer of the flexible electronic device after the layers are compounded. The compounding of the edge adhesive film can be performed at the same time of rolling compounding of the area of the flexible electronic device; the area of the middle flexible electronic device can be rolled and compounded first, and then the adhesive film at the edge can be rolled and compounded by another pair of rollers. Generally, softer rubber rolls are used (hardness of 70A or less, preferably 50A or less). The width of the edge seal depends on the thickness of the internal flexible electronic device and the thickness of the adhesive film. The intermediate layer of the flexible electronic device with the edge sealing section can be directly packaged for use later, and the edge sealing section can be cut off for reuse.
In one embodiment of the invention, the adhesive film is a transparent, translucent, opaque, filtered, colored, specularly reflective or hazy adhesive film.
In the invention, the adhesive film material can be modified according to the requirements (such as decoration and functionality) to obtain specific properties of the product. For example by doping with a specific substance (e.g. TiO 2 Powder, siO 2 Powder, al 2 O 3 Powder or nano particles, etc.), dye pigments, controlling local crystallinity and crosslinking degree, controlling color, haze, and increasing the productOr reduce the absorption and/or reflection of electromagnetic waves with specific wavelength, so that the product forms specific patterns, or realize the functions of blocking ultraviolet rays, blocking infrared rays, reflecting ultraviolet rays, reflecting infrared rays, transmitting 4g or 5g communication signals and the like.
In an embodiment of the present invention, the adhesive film is a pressure sensitive adhesive film or a hot melt adhesive film.
In one embodiment of the present invention, the main material of the pressure-sensitive adhesive film is rubber, polyacrylate, polyvinyl ether, ethylene and its copolymer, EVA (ethylene-vinyl acetate copolymer), EEA (ethylene-ethyl acrylate copolymer), EAA (ethylene-acrylic acid copolymer), EVAL (ethylene-vinyl acetate-vinyl alcohol terpolymer), polyurethane, polyester, polyvinyl chloride or silicone.
In one embodiment of the present invention, the main material of the hot melt adhesive film is ethylene and its copolymer, ethylene and vinyl acetate copolymer, polyamide, polyolefin hot melt adhesive (e.g. PE, PP), polystyrene (e.g. SBS, SIS), amorphous alpha-olefin copolymer, thermoplastic Polyurethane (TPU), polyvinyl butyral (PVB), polyester, ionic resin or silicone.
In one embodiment of the invention, the electrochromic film and the adhesive film are rolled by a local heating roller to form a local bonding structure between the electrochromic film and the adhesive film.
In a second aspect, the present invention provides a process for preparing the intermediate layer of the flexible electronic device according to the first aspect, the process comprising the steps of:
(1) Unreeling the flexible electronic device coil stock;
(2) Continuously attaching packaging films on one side or two sides of the flexible electronic device treated in the step (1) by a rolling method, wherein the packaging films are adhesive films or composite films of the adhesive films and release films; and obtaining the intermediate layer of the flexible electronic device.
Taking a flexible electronic device as a flexible electrochromic film as an example:
when the electrochromic film in the prior art is applied to downstream products, double-sided laminating is needed layer by layer, the process is complicated, the error is large during lamination, a large amount of manpower and material resources are needed to be consumed, and the mass production efficiency is low.
Moreover, there is no mature process for attaching hot melt adhesive to the surface of the electrochromic film in the prior art, because the outermost layer of the electrochromic film is usually plastic such as PET (polyethylene terephthalate), and the extrusion temperature of the hot melt adhesive (such as PVB) is 160-250 ℃ which is far higher than the temperature that can be born by the plastic such as common PET, and when the hot melt adhesive is extrusion-melt coated on the surface of the electrochromic film, the electrochromic film is damaged. If the pressure sensitive adhesive is attached to the surface of the electrochromic film in a coating mode, the production equipment cost is higher, and the production process is more complex.
The preparation process provided by the invention directly uses the mature adhesive film in the market, and prepares the intermediate layer of the flexible electronic device by compounding the adhesive film with the flexible electrochromic film in an innovative roll-to-roll rolling mode; the intermediate layer of the flexible electronic device can be conveniently compounded with the shell materials such as glass and the like to prepare the packaged electrochromic device product, so that the production efficiency is obviously improved, the risk of the production process is reduced, and the flexibility is increased. Likewise, for other flexible electronic devices, such as flexible solar cells, flexible thin film batteries, flexible thin film capacitors, flexible OLEDs, flexible electronic writing papers, flexible thin film sensors, flexible thermochromic thin films, flexible photochromic thin films and other flexible electronic devices requiring packaging, the preparation process of the flexible electronic device intermediate layer provided by the invention also obviously improves the production efficiency, reduces the risk of the production process, and increases the flexibility.
In the invention, for the middle layer of the flexible electronic device with the adhesive films on both sides, a pair of rollers can be used for simultaneously attaching the adhesive films on both sides of the flexible electronic device during rolling, and two pairs of rollers can be used for sequentially attaching the adhesive films on both sides of the flexible electronic device.
In one embodiment of the present invention, the unwinding speed in step (1) is 0.01-5m/min; for example, it may be 0.01m/min, 0.03m/min, 0.05m/min, 0.06m/min, 0.08m/min, 0.1m/min, 0.3m/min, 0.5m/min, 0.8m/min, 1m/min, 1.2m/min, 1.5m/min, 1.8m/min, 2m/min, 2.2m/min, 2.5m/min, 2.8m/min, 3m/min, 3.2m/min, 3.5m/min, 3.8m/min, 4.2m/min, 4.5m/min, 4.8m/min, 5m/min, etc.
In one embodiment of the present invention, step (1) further comprises surface treating the flexible electronic device to increase surface tension.
In one embodiment of the invention, the surface treatment is plasma treatment, ultraviolet ozone cleaning or corona treatment.
In one embodiment of the present invention, the preparation process further comprises: after the encapsulation film is attached in step (2), the attachment defect is detected and recorded by machine vision.
The present invention is not particularly limited in the kind of machine vision detection, and may be, for example, CCD vision detection. For defective (bubbles, wrinkles, impurities, etc.) parts, cutting may be performed later.
In one embodiment of the present invention, the adhesive film in the step (2) is a pressure-sensitive adhesive film, and the temperature of the rolling is 18-90 ℃; for example, 18℃20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, or 90℃may be used.
In an embodiment of the present invention, the adhesive film in the step (2) is a hot melt adhesive film, and the temperature of the rolling is 18-160 ℃, for example, 18 ℃, 20 ℃, 25 ℃, 30 ℃, 35 ℃, 40 ℃, 45 ℃, 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃, 85 ℃, 90 ℃, 95 ℃, 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃, 150 ℃, 160 ℃, or the like; further preferably 30 to 90 ℃.
The temperature of the roll in the present invention means the temperature of the roll used. Because the contact time of the roller and the adhesive film is shorter in the rolling process, the roller is not in direct contact with the flexible electronic device, and the actual temperature of the flexible electronic device is lower than the temperature of the roller, when the hot melt adhesive film is used, the rolling temperature can be slightly higher than the bearing temperature of the flexible electronic device.
For the intermediate layer of the flexible electronic device using the hot melt adhesive film, rolling pre-lamination is performed at low temperature, so that the adhesive film and the flexible electronic device can be bonded to a certain extent, and dislocation can be avoided. For hot melt adhesive films with certain normal temperature viscosity or pressure sensitivity, rolling can be directly carried out at normal temperature. When downstream products such as electrochromic glass of G+F+G structure are to be prepared, the initial press and the final press are performed again, so that the bonding stability of the products can be ensured.
In the present invention, the material of the roller pair used for rolling may be rubber, plastic, metal or a combination thereof, preferably silicone rubber, resin or steel. For the middle layer of the flexible electronic device using the hot melt adhesive film without the release film, a layer of anti-sticking coating such as silica gel or polytetrafluoroethylene (teflon) can be added on the surface of the roller in order to prevent the adhesive film from sticking to the roller. For the middle layer of the flexible electronic device without the release film, a diaphragm can be added between the layers during rolling; or rolling at low temperature and storing at low temperature.
In one embodiment of the present invention, at least one of the roller pairs used in the rolling in the step (2) is an integrally heated roller, and the integrally heated roller is a roller with an entirely heatable surface.
The hot melt adhesive film is usually provided with an embossed structure on the surface thereof for discharging air bubbles between layers during vacuum lamination or roll pressing. If the rolling in the step (2) adopts an integral heating roller, the embossing structure on the surface of the hot melt adhesive film is easy to flatten, which is unfavorable for the subsequent compounding of the intermediate layer of the flexible electronic device and the shell materials such as glass. Therefore, it is preferable that the adhesive film surface of the intermediate layer of the flexible electronic device is embossed again after the completion of the rolling in step (2).
In one embodiment of the present invention, at least one of the roller pairs used in the rolling in step (2) is a locally heated roller, and the locally heated roller is a roller with a locally heatable surface.
Preferably, the partially heated roll surface has a heated zone and a non-heated zone, the non-heated zone being continuous.
Preferably, the area of the localized heated roll surface non-heated zone is greater than the area of the heated zone.
The non-heating area of the surface of the local heating roller can be made of materials such as rubber, plastic and the like with low heat conduction; the heating zone can be made of high heat conduction metal, plastic and other materials. The intermediate layer of the flexible electronic device manufactured by rolling with the local heating roller can be directly subjected to subsequent lamination and encapsulation without an additional embossing process.
In one embodiment of the present invention, at least one of the roller pairs used in the rolling in the step (2) is a partial pressure roller, and the partial pressure roller surface has a pressure area and a non-pressure area, and the pressure area is raised compared with the non-pressure area and/or the hardness of the pressure area is greater than the hardness of the non-pressure area.
Preferably, the height of the protrusions is 100-2000 μm; for example, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, 500 μm, 600 μm, 700 μm, 800 μm, 900 μm, 1000 μm, 1100 μm, 1200 μm, 1300 μm, 1500 μm, 1800 μm or 2000 μm, etc. may be mentioned.
Preferably, the non-pressurized region of the localized pressurized roll surface is continuous.
Preferably, the area of the non-pressurized region of the surface of the localized pressure roller is greater than the area of the pressurized region.
When the local pressurizing roller is rolled, the pressure intensity of the pressurizing area is larger than that of the non-pressurizing area, and finally, the adhesive fixation between the additionally pressurized local hot melt adhesive film and the flexible electronic device is realized. By way of example, the localized pressure rollers may take the following configuration:
a) The hardness of the roll surface materials is consistent, and the pressurizing area is slightly raised;
b) The roller surface is free of bulges, the pressurizing area is made of materials with higher hardness (such as rubber covered steel rollers, teflon and other resins), and the non-pressurizing area is made of materials with lower hardness (such as soft silicone rubber);
or c) the compression zone is slightly convex and uses a harder material for the compression zone and a less harder material for the non-compression zone.
The flexible electronic device intermediate layer manufactured by partial pressure roller rolling can be directly subjected to subsequent lamination packaging without an additional embossing process.
In one embodiment of the present invention, at least one of the roller pairs used in the rolling in step (2) is a locally pressurized heated roller, and the surface of the locally pressurized heated roller has both a pressurized zone and a heated zone, and a non-pressurized heated zone.
The non-pressurized heating zone refers to a zone that is neither pressurized nor heated. The pressing zone and the heating zone of the localized pressure heated roll surface may be the same zone (i.e., the zone is both pressing and heating) or may be different zones (i.e., the pressing zone and the heating zone are separate from each other). For a locally pressurized heated roller, the manner in which the localized surface pressurization is achieved can be the same as for a locally pressurized roller.
After the intermediate layer of the flexible electronic device is obtained by adopting the preparation process provided by the invention, the intermediate layer can be rolled for standby, and can also directly enter the subsequent process for preparing downstream products. Taking a flexible electronic device as a flexible electrochromic film as an example, the subsequent process comprises the following steps:
cutting, half-cutting, electrode arrangement, aging, cleaning and testing the intermediate layer of the flexible electronic device, and then compounding with the shell material;
the cutting method can be as follows: laser, die cutting, engraving or water jet;
the half-cutting method can be as follows: laser and die cutting;
the method of electrode arrangement may be: printing;
the aging method can be as follows: illumination, ultraviolet illumination, infrared illumination, and heating;
the cleaning method can be as follows: mechanical cleaning, laser cleaning and plasma cleaning;
The items tested may be: CCD visual detection, film thickness detection, resistance and sheet resistance detection, specific wavelength or transmittance detection of wavelength combination and roughness detection;
the compounding method can be as follows: direct bonding, roll bonding, vacuum bonding, hot lamination, and hot rolling;
the housing material may be glass or other transparent material, reflective material, non-transparent material, or a combination thereof.
Compared with the prior art, the invention has the following beneficial effects:
the intermediate layer of the flexible electronic device provided by the invention is an intermediate product for preparing a packaged flexible electronic device product, can protect the flexible electronic device, and can prevent the flexible electronic device from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes.
The preparation process provided by the invention directly uses the mature adhesive film in the market, and is compounded with the flexible electronic device in an innovative roll-to-roll rolling way to prepare the intermediate layer of the flexible electronic device with high efficiency; the intermediate layer of the flexible electronic device can directly replace the existing common intermediate layer to be compounded with the outer shell materials such as glass and the like to prepare the packaged flexible electronic device product, so that the production efficiency is obviously improved, the risk of a production process is reduced, the flexibility is increased, the existing packaging equipment, process and operation method are not changed, and the popularization and application are facilitated.
Drawings
Fig. 1 is a schematic cross-sectional view of an intermediate layer of a flexible electronic device according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a process for preparing an intermediate layer of a flexible electronic device according to embodiment 1 of the present invention.
Fig. 3 is a schematic view of a process for preparing a downstream product of an intermediate layer of a flexible electronic device according to embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of a process for preparing an intermediate layer of a flexible electronic device according to embodiment 2 of the present invention.
Fig. 5 is a schematic view of a process for preparing a downstream product of the intermediate layer of the flexible electronic device according to embodiment 2 of the present invention.
Fig. 6 is a schematic diagram of a process for preparing an intermediate layer of a flexible electronic device according to embodiment 3 of the present invention.
Fig. 7 is a schematic view of the structure of a roll for attaching a film in embodiment 3 of the present invention.
Fig. 8 is a schematic view of the structure of a roll for attaching a film in embodiment 4 of the present invention.
Fig. 9 is a schematic view of the structure of a roll for attaching a film in embodiment 5 of the present invention.
Fig. 10 is a schematic cross-sectional view of an intermediate layer of a flexible electronic device according to embodiment 6 of the present invention.
Fig. 11 is a schematic view of a process for preparing an intermediate layer of a flexible electronic device according to embodiment 6 of the present invention.
Fig. 12 is a schematic view of the structure of a roll for attaching a film in embodiment 6 of the present invention.
Fig. 13 is a schematic view showing the structure of a roll for attaching a film in example 7 of the present invention.
Fig. 14 is a schematic view showing the structure of a roll for attaching a film in embodiment 8 of the present invention.
Fig. 15 is a schematic view showing the structure of a roll for attaching a film in example 9 of the present invention.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings. It should be apparent to those skilled in the art that the detailed description is merely provided to aid in understanding the invention and should not be taken as limiting the invention in any way.
Example 1
The embodiment provides an intermediate layer of a flexible electronic device, as shown in fig. 1, which comprises the flexible electronic device, a first adhesive film and a second adhesive film which are respectively arranged at two sides of the flexible electronic device, and a first release film arranged at the outer side of the first adhesive film and a second release film arranged at the outer side of the second adhesive film;
wherein the flexible electronic device is a flexible electrochromic film.
It should be noted that the structure of the flexible electronic device shown in fig. 1 only shows that it has a multi-layer structure when it is a flexible electrochromic film, and should not be construed as having only three layers.
The embodiment also provides a preparation process of the intermediate layer of the flexible electronic device, as shown in fig. 2, comprising the following steps:
(1) Unreeling a flexible electrochromic film roll (thickness 0.4 mm);
(2) Continuously attaching packaging films (three-layer composite films of a heavy release film, a pressure-sensitive adhesive film and a light release film are adopted as raw materials) on two sides of the flexible electrochromic film treated in the step (1) by using a pair of rubber rollers through a rolling method, rolling and tearing off the light release film before attaching, and attaching the packaging film on the surface of the flexible electrochromic film to the composite film of the heavy release film and the pressure-sensitive adhesive film, wherein the heavy release film is at the outermost side, the thickness of the pressure-sensitive adhesive film is 0.2mm, and the main component of the pressure-sensitive adhesive film is polymethyl methacrylate) so as to obtain the middle layer of the flexible electronic device;
(3) And (3) visually detecting the defect of the lamination by using a CCD, recording or marking, and rolling for standby or entering a next production line.
The intermediate layer of the flexible electronic device provided in this embodiment enters a production line for preparing a downstream product, as shown in fig. 3, and the preparation process of the downstream product includes:
(a) Cutting by laser;
(b) The printed electrode arrangement and the flexible connection terminal are led out;
(c) Removing the heavy release film on one side of the prepared sheet type flexible electronic device interlayer, and attaching the heavy release film on the planar glass;
(d) And removing the heavy release film on the other side, and oppositely sticking the heavy release film and the other piece of glass.
The embodiment adopts an innovative roll-to-roll rolling production process, and can rapidly prepare the intermediate layer of the flexible electronic device in large batch; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
Example 2
The present embodiment provides an intermediate layer of a flexible electronic device, which has the same structure as that of embodiment 1, and the preparation process is shown in fig. 4, and includes the following steps:
(1) Unreeling a roll of flexible electrochromic film (thickness 0.1 mm), corona treating the flexible electrochromic film to increase surface tension;
(2) Continuously attaching packaging films (three-layer composite films of a heavy release film, a pressure-sensitive adhesive film and a light release film are adopted as raw materials, the light release film is rolled and removed before attaching, the packaging film attached to the surface of the flexible electrochromic film is a composite film of the heavy release film and the pressure-sensitive adhesive film, wherein the heavy release film is at the outermost side, the thickness of the pressure-sensitive adhesive film is 0.1mm, and the main component of the pressure-sensitive adhesive film is polymethyl methacrylate) on two sides of the flexible electrochromic film treated in the step (1) by using two pairs of rubber rollers;
(3) And (5) visually detecting the defect of the lamination by using a CCD, recording or marking, and rolling for standby.
The intermediate layer of the flexible electronic device provided in this embodiment enters a production line for preparing a downstream product, as shown in fig. 5, and the preparation process of the downstream product includes:
(a) Cutting and half-cutting by laser;
(b) The printed electrode arrangement and the flexible connection terminal are led out;
(c) Removing the heavy release film on one side of the prepared sheet type flexible electronic device interlayer, and attaching the heavy release film to a first shell (plane glass) by using a rubber roller;
(d) And removing the heavy release film on the other side, and attaching the second shell (planar glass) by using a vacuum attaching machine.
The embodiment adopts an innovative roll-to-roll rolling production process, and can rapidly prepare the intermediate layer of the flexible electronic device in large batch; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
Example 3
The present embodiment provides an intermediate layer of a flexible electronic device, which has the same structure as that of embodiment 1, and the preparation process is shown in fig. 6, and includes the following steps:
(1) Unreeling a roll of flexible electrochromic film (thickness 0.3 mm), and subjecting the flexible electrochromic film to plasma treatment to increase surface tension;
(2) Continuously attaching packaging films (three-layer composite films of a heavy release film, an EVA hot melt adhesive film and a light release film are adopted as raw materials) on two sides of the flexible electrochromic film treated in the step (1) by using a pair of rollers through a rolling method, rolling and tearing off the light release film before attaching, and attaching the packaging film on the surface of the flexible electrochromic film to the composite film of the heavy release film and the EVA hot melt adhesive film, wherein the heavy release film is at the outermost side, and the thickness of the EVA hot melt adhesive film is 0.3 mm), so as to obtain the middle layer of the flexible electronic device;
(3) The CCD visually detects the defect of the lamination, records or marks the defect, and enters the next production line;
the structure of the roller used in the step (2) is shown in fig. 7, and the roller comprises two opposite local heating rollers, wherein the surface of each local heating roller is provided with a heating zone and a non-heating zone, the heating zone is made of high-heat-conductivity material, the non-heating zone is made of low-heat-conductivity material, the non-heating zone is continuous and has an area larger than that of the heating zone, and the heating zones of the two local heating rollers are mutually aligned; the heating zone was heated to 60 ℃ during rolling, and the non-heating zone was not heated.
The intermediate layer of the flexible electronic device provided by the embodiment enters a production line for preparing a downstream product, and the preparation process of the downstream product comprises the following steps:
(a) Cutting by laser;
(b) The printed electrode arrangement and the flexible connection terminal are led out;
(c) Removing heavy release films on two sides of the prepared middle layer of the sheet type flexible electronic device, and attaching plate glass on two sides in a dust-free workshop to complete lamination;
(d) Hot-pressing for 20 min at 90deg.C and 0.1MPa with a hot laminator;
(e) After the hot pressing is completed, the material is irradiated and solidified by an ultraviolet lamp, and the energy is 4000mJ/cm 2 。
The embodiment adopts the local heating roller, realizes the bonding and fixing between the hot melt adhesive film and the flexible electrochromic film at low temperature through local additional heating, and can rapidly prepare the intermediate layer of the flexible electronic device in large batch by adopting the innovative roll-to-roll rolling production process; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
Example 4
The present embodiment provides an intermediate layer of a flexible electronic device and a manufacturing process thereof, which is different from embodiment 3 in that the structure of the roller used in step (2) is as shown in fig. 8, and the roller comprises two opposite localized pressure rollers, the surface of the localized pressure rollers has a pressure area and a non-pressure area, the pressure area and the non-pressure area are the same, the pressure area is 200 μm raised compared with the non-pressure area, the non-pressure area is continuous and the area is larger than the area of the pressure area, and the pressure areas of the two localized pressure rollers are aligned with each other.
The embodiment adopts the local pressurizing roller, realizes the bonding and fixing between the hot melt adhesive film and the flexible electrochromic film at normal temperature through local additional pressurization, and can rapidly prepare the intermediate layer of the flexible electronic device in large batch by adopting the innovative roll-to-roll rolling production process; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
Example 5
The present embodiment provides an intermediate layer of a flexible electronic device, which has the same structure as that of embodiment 1, and the preparation process includes the following steps:
(1) Unreeling a flexible electrochromic film coil stock (with the thickness of 0.2 mm), and carrying out ultraviolet ozone cleaning treatment on the flexible electrochromic film to improve the surface tension;
(2) Continuously attaching packaging films (three layers of composite films of a heavy release film, a PVB hot melt adhesive film and a light release film are adopted as raw materials) on two sides of the flexible electrochromic film treated in the step (1) by using a pair of rollers through a rolling method, rolling and tearing off the light release film before attaching, and attaching the packaging film on the surface of the flexible electrochromic film to the composite film of the heavy release film and the PVB hot melt adhesive film, wherein the heavy release film is at the outermost side, and the thickness of the PVB hot melt adhesive film is 0.4 mm), so as to obtain the intermediate layer of the flexible electronic device;
(3) Embossing the surface of the adhesive film by using surface embossing equipment, then visually detecting the adhering defect by using a CCD, recording or marking, and entering a next production line;
wherein, the structure of the roller used in the step (2) is shown in fig. 9, and comprises two oppositely arranged integral heating rollers; the roller was heated to 140 ℃ during rolling.
The intermediate layer of the flexible electronic device provided by the embodiment enters a production line for preparing a downstream product, and the preparation process of the downstream product comprises the following steps:
(a) Cutting by laser;
(b) The printed electrode arrangement and the flexible connection terminal are led out;
(c) Removing heavy release films on two sides of the prepared middle layer of the sheet type flexible electronic device, and attaching plate glass on two sides in a dust-free workshop to complete lamination;
(d) Using a heat laminating machine, and hot-pressing for 30 minutes at 100 ℃ and 0.1MPa to finish initial pressing;
(e) After the initial pressure is completed, hot pressing is carried out for 60 minutes in an autoclave at 130 ℃ and 1.0MPa, and the final pressure is completed.
The embodiment adopts the integral heating roller to realize the bonding and fixing between the hot melt adhesive film and the flexible electrochromic film at low temperature, and adopts the innovative roll-to-roll rolling production process to rapidly prepare the intermediate layer of the flexible electronic device in large batch; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
Example 6
The embodiment provides an intermediate layer of a flexible electronic device, as shown in fig. 10, which comprises the flexible electronic device, a first adhesive film arranged on one side of the flexible electronic device, and a first release film arranged on the outer side of the first adhesive film;
Wherein the flexible electronic device is a flexible electrochromic film.
It should be noted that the structure of the flexible electronic device shown in fig. 10 only shows that it has a multi-layer structure when it is a flexible electrochromic film, and should not be construed as having only three layers.
The embodiment also provides a preparation process of the intermediate layer of the flexible electronic device, as shown in fig. 11, comprising the following steps:
(1) Unreeling a roll of flexible electrochromic film (thickness 0.4 mm), corona treating the flexible electrochromic film to increase surface tension;
(2) Continuously attaching a packaging film (a three-layer composite film of a heavy release film, an EVA hot melt adhesive film and a light release film which are used as raw materials) on one side of the flexible electrochromic film treated in the step (1) by using a pair of rollers through a rolling method, rolling and tearing off the light release film before attaching, and attaching the packaging film on the surface of the flexible electrochromic film to the composite film of the heavy release film and the EVA hot melt adhesive film, wherein the heavy release film is at the outermost side, and the thickness of the EVA hot melt adhesive film is 0.2 mm), so as to obtain the middle layer of the flexible electronic device;
(3) Then the CCD visually detects the defect of the lamination, and the defect is recorded or marked and rolled for standby;
wherein, the structure of the roller used in the step (2) is shown in fig. 12, and the roller comprises a local heating roller and a rubber roller which are oppositely arranged; the surface of the local heating roller is provided with a heating zone and a non-heating zone, the heating zone is made of high heat conduction material, the non-heating zone is made of low heat conduction material, and the area of the non-heating zone is continuous and is larger than that of the heating zone; the heating zone of the local heating roller is heated to 80 ℃ during rolling, and the non-heating zone and the rubber roller are not heated.
The intermediate layer of the flexible electronic device provided by the embodiment enters a production line for preparing a downstream product, and the preparation process of the downstream product comprises the following steps:
(a) Cutting by laser;
(b) The printed electrode arrangement and the flexible connection terminal are led out;
(c) Removing the heavy release film from the prepared intermediate layer of the sheet type flexible electronic device, and attaching the plate glass on the adhesive film on one side in a dust-free workshop to complete the lamination;
(d) Hot-pressing for 20 min at 90deg.C and 0.1MPa with a hot laminator;
(e) After the hot pressing is completed, the material is irradiated and solidified by an ultraviolet lamp, and the energy is 4000mJ/cm 2 。
According to the embodiment, the single local heating roller is matched with the common rubber roller, the bonding and fixing between the hot melt adhesive film and the flexible electrochromic film at low temperature are realized through local additional heating, and the flexible electronic device middle layer can be rapidly prepared in a large scale by adopting an innovative roll-to-roll rolling production process; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
Preparation example 7
This example provides an intermediate layer of a flexible electronic device and a process for producing the same, which is different from example 6 in that the structure of the roller used in step (2) is as shown in fig. 13, and includes a locally pressing roller and a steel roller which are disposed opposite to each other; the surface of the local pressurizing roller is provided with a pressurizing area and a non-pressurizing area, wherein the hardness of the pressurizing area is larger than that of the non-pressurizing area (the pressurizing area is made of Teflon resin, the non-pressurizing area is made of soft silicone rubber), and the area of the non-pressurizing area is continuous and larger than that of the pressurizing area.
According to the embodiment, a single local pressurizing roller is matched with a common steel roller, the bonding and fixing between the hot melt adhesive film and the flexible electrochromic film at normal temperature are realized through local additional pressurization, and an innovative roll-to-roll rolling production process is adopted, so that the middle layer of the flexible electronic device can be rapidly prepared in a large scale; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
Preparation example 8
The present embodiment provides an intermediate layer of a flexible electronic device, which has the same structure as that of embodiment 6, and the preparation process includes the following steps:
(1) Unreeling a flexible electrochromic film roll (thickness 0.1 mm);
(2) Continuously attaching a packaging film (a three-layer composite film of a heavy release film, a PVB hot melt adhesive film and a light release film which are used as raw materials) on one side of the flexible electrochromic film treated in the step (1) by using a pair of rollers through a rolling method, rolling and tearing off the light release film before attaching, and attaching the packaging film on the surface of the flexible electrochromic film to the composite film of the heavy release film and the PVB hot melt adhesive film, wherein the heavy release film is at the outermost side, and the thickness of the PVB hot melt adhesive film is 0.1 mm), so as to obtain the intermediate layer of the flexible electronic device;
(3) Embossing the surface of the adhesive film by using surface embossing equipment, then visually detecting the adhering defect by using a CCD, recording or marking, and rolling for standby;
the structure of the roller used in the step (2) is shown in fig. 14, and the roller comprises an integral heating roller and a rubber roller which are oppositely arranged; the whole heating roller is heated to 120 ℃ during rolling, and the rubber roller is not heated.
The intermediate layer of the flexible electronic device provided by the embodiment enters a production line for preparing a downstream product, and the preparation process of the downstream product comprises the following steps:
(a) Cutting by laser;
(b) The printed electrode arrangement and the flexible connection terminal are led out;
(c) Removing the heavy release film on one side of the prepared middle layer of the sheet type flexible electronic device, and attaching the flat glass on the adhesive film on one side in a dust-free workshop to complete the sheet combination;
(d) Using a heat laminating machine, and hot-pressing for 30 minutes at 100 ℃ and 0.1MPa to finish initial pressing;
(e) After the initial pressure is completed, hot pressing is carried out for 60 minutes in an autoclave at 130 ℃ and 1.0MPa, and the final pressure is completed.
According to the embodiment, the single integral heating roller is matched with the common rubber roller, so that the bonding and fixing between the hot melt adhesive film and the flexible electrochromic film at low temperature are realized, and the novel roll-to-roll rolling production process is adopted, so that the intermediate layer of the flexible electronic device can be rapidly prepared in a large scale; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
Example 9
The difference between the manufacturing process and the manufacturing process of the flexible electronic device interlayer provided in this embodiment is that the structure of the roller used in the step (2) is shown in fig. 15, and the roller comprises two opposite local pressurizing and heating rollers, wherein the surface of the local pressurizing and heating roller is provided with a pressurizing and heating area and a non-pressurizing and heating area, the hardness of the pressurizing and heating area is greater than that of the non-pressurizing and heating area (the pressurizing and heating area is made of encapsulated steel, the non-pressurizing and heating area is made of soft silicon rubber), the non-pressurizing and heating area is continuous and is greater than that of the pressurizing and heating area, and the pressurizing and heating areas of the two local pressurizing and heating rollers are aligned with each other; the pressure and temperature of the pressurized heating zone are higher than those of the non-pressurized heating zone during rolling.
According to the embodiment, the local pressurizing and heating roller is adopted, the bonding and fixing between the hot melt adhesive film and the flexible electrochromic film are realized through the local additional pressurizing and heating, and the flexible electronic device intermediate layer can be rapidly prepared in a large scale by adopting an innovative roll-to-roll rolling production process; the intermediate layer of the flexible electronic device can protect the electrochromic film, prevent the electrochromic film from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
The embodiment of the invention provides a specific embodiment when the flexible electronic device is a flexible electrochromic film, and it can be understood that the flexible electrochromic film in the above embodiment of the invention can be replaced by other types of flexible electronic devices, such as a flexible solar cell, a flexible thin film battery, a flexible thin film capacitor, a flexible OLED, a flexible electronic writing paper, a flexible thin film sensor, a flexible thermochromic film, a flexible photochromic film and the like, so as to realize the preparation of the intermediate layer of the flexible electronic device of the corresponding type and obtain the intermediate layer product of the flexible electronic device of the corresponding type. The embodiment of the invention adopts an innovative roll-to-roll rolling production process, and can rapidly prepare the intermediate layer of the flexible electronic device in large batch; the intermediate layer of the flexible electronic device can protect the flexible electronic device, avoid the flexible electronic device from being scratched or influenced by factors such as ultraviolet rays, water, oxygen and the like in the storage, transportation and packaging processes, can be more easily compounded with the outer shell materials such as glass and the like, improves the production efficiency of downstream products, does not change the existing packaging equipment, process and operation method, and is convenient to popularize and apply.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.

Claims (10)

1. A flexible electrochromic film interlayer, the flexible electrochromic film interlayer comprising: the device comprises an electrochromic film, adhesive films arranged on one side or two sides of the electrochromic film, and a release film optionally arranged on the outer side of the adhesive films; the electrochromic film and the adhesive film or the composite film of the electrochromic film and the adhesive film and the release film are rolled to obtain a flexible electrochromic film intermediate layer;
wherein the adhesive film is a pressure-sensitive adhesive film and the rolling temperature is 18-90 ℃, or the adhesive film is a hot melt adhesive film and the rolling temperature is 18-160 ℃.
2. The flexible electrochromic film interlayer of claim 1, wherein the hot melt adhesive film surface has an embossed structure.
3. The flexible electrochromic film interlayer of claim 1 wherein the electrochromic film and the adhesive film are rolled by a locally heated roller to form a localized bond between the electrochromic film and the adhesive film.
4. The electrochromic film interlayer of claim 1, wherein the width of the glue film is equal to or greater than the width of the flexible electrochromic film.
5. The electrochromic film interlayer according to claim 1, wherein the flexible electrochromic film has a thickness of 10 μιη to 10000 μιη.
6. The electrochromic film interlayer according to claim 1, wherein the thickness of the adhesive film is 10 μm to 3000 μm.
7. The preparation process of the electrochromic film interlayer is characterized by comprising the following steps of:
(1) Unreeling a flexible electrochromic film roll;
(2) Continuously attaching packaging films on one side or two sides of the flexible electrochromic film treated in the step (1) by a rolling method, wherein the packaging films are adhesive films or composite films of the adhesive films and release films; obtaining the flexible electrochromic film interlayer;
wherein the adhesive film in the step (2) is a pressure-sensitive adhesive film, the rolling temperature is 18-90 ℃, or the adhesive film in the step (2) is a hot melt adhesive film, and the rolling temperature is 18-160 ℃.
8. The process for preparing an intermediate layer of an electrochromic film according to claim 7, wherein at least one of the pairs of rolls used in the rolling in the step (2) is an integrally heated roll, and the integrally heated roll is a roll having an entirely heatable surface.
9. The process for preparing an intermediate layer of an electrochromic film according to claim 8, wherein after the rolling in step (2) is completed, the adhesive film surface of the flexible electrochromic film is embossed again.
10. The process for preparing an intermediate layer of an electrochromic film according to claim 7, wherein at least one of the pairs of rolls used in the rolling in step (2) is a locally heated roll, the locally heated roll being a roll having a surface which is locally heatable only.
CN202311386883.XA 2020-01-03 2020-02-28 Flexible electrochromic film interlayer and preparation process thereof Pending CN117264547A (en)

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CN202010006650 2020-01-03
CN2020100066502 2020-01-03
CN202010127248.XA CN111218223B (en) 2020-01-03 2020-02-28 Flexible electronic device interlayer and preparation process thereof

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