CN113650373A - Touch layer, preparation method thereof and touch device - Google Patents
Touch layer, preparation method thereof and touch device Download PDFInfo
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- CN113650373A CN113650373A CN202010397923.0A CN202010397923A CN113650373A CN 113650373 A CN113650373 A CN 113650373A CN 202010397923 A CN202010397923 A CN 202010397923A CN 113650373 A CN113650373 A CN 113650373A
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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
- 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
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/02—Layer formed of wires, e.g. mesh
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal 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
- B32B15/09—Layered products comprising a layer of metal comprising metal 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 comprising polyesters
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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
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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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
- B32B2255/00—Coating on the layer surface
- B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
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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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/103—Metal fibres
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/418—Refractive
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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
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/208—Touch screens
Abstract
The invention provides a touch layer, a preparation method thereof and a touch device, and relates to the technical field of touch. The touch layer comprises a first substrate layer, a nano metal wire film layer with a touch array pattern and a second substrate layer, wherein the nano metal wire film layer is located between the first substrate layer and the second substrate layer, and a high-refractive-index polymer is mixed in the nano metal wire film layer. In the embodiment of the invention, the high-refractive-index polymer can be mixed in the nano metal wire film layer positioned between the first substrate layer and the second substrate layer in the touch layer, so that the refractive index of the nano metal wire film layer can be adjusted, the diffuse reflection of the nano metal wire film layer is weakened, and the haze of the surface of the touch layer is reduced.
Description
Technical Field
The present invention relates to the field of touch technologies, and in particular, to a touch layer, a method for manufacturing the touch layer, and a touch device.
Background
With the development of mobile terminals, wearable devices and intelligent household appliances, the market has increasingly greater demands for large-size, low-price and flexibility of touch panels. The touch layer in the touch panel usually adopts an ITO thin film, and the essential problems of the conventional ITO thin film, such as the inability of bending application, low conductivity, low light transmittance, and the like, cannot be effectively improved. The advantages of nano-metal wires such as nano-silver wires in resistance, ductility and flexibility make them an important solution to replace ITO thin films.
Taking a nano silver wire as an example, the nano silver wire technology is to coat a nano silver wire ink material on a plastic or glass substrate, and then, by using a laser lithography technology, a transparent conductive film with a horizontally and vertically staggered touch array pattern is manufactured to be used as a touch layer. The diameter of the line width is very small, about 50nm, so the transmittance of the film can reach more than 90%.
However, the nano silver wire touch layer has the disadvantages that the nano silver wire is coated to be stained on the surface of the whole bottom substrate, so that the surface of the touch layer manufactured by the nano silver wire process has high haze and serious diffuse reflection problem, and the haze problem of the screen can cause that the screen reflects light strongly under the condition of strong light irradiation, and the user can not see the screen clearly in serious cases. Therefore, the nano metal wire touch layer has the problem of high haze.
Disclosure of Invention
The invention provides a touch layer, a preparation method thereof and a touch device, and aims to solve the problem that a screen is easily not clearly seen by a user due to the fact that the haze of an existing nano metal wire touch layer is large.
In order to solve the above problems, the present invention discloses a touch layer, which includes a first substrate layer, a nano metal wire film layer having a touch array pattern, and a second substrate layer, wherein the nano metal wire film layer is located between the first substrate layer and the second substrate layer, and a high refractive index polymer is mixed in the nano metal wire film layer.
Optionally, a plurality of first light-gathering structures are arranged on one side, close to the first substrate layer, of the metal nanowire film layer, a plurality of first microstructures are arranged on one side, close to the metal nanowire film layer, of the first substrate layer, and the first light-gathering structures are matched with the first microstructures in shape.
Optionally, one side of the nano metal wire film layer close to the second substrate layer is provided with a plurality of second light concentrating structures, one side of the second substrate layer close to the nano metal wire film layer is provided with a plurality of second microstructures, and the shapes of the second light concentrating structures are matched with those of the second microstructures.
Optionally, the first light-gathering structure is a hemispherical convex structure.
Optionally, the second light-concentrating structure is a hemispherical convex structure.
Optionally, at least one of metal oxide nanoparticles, high atomic number monomers, and high atomic number polymers is further mixed in the nano metal wire film layer.
Optionally, the high refractive index polymer comprises at least one of a polymer of an aromatic monomer and a polymer of a brominated aromatic monomer.
Optionally, the nano-metal wire film layer includes at least one of a nano-silver wire, a nano-copper wire, and a nano-tin wire.
In order to solve the above problems, the present invention also discloses a method for manufacturing a touch layer, the method comprising:
adding a high-refractive-index polymer into the nano metal wire ink to form a nano metal wire mixed solution;
coating the mixed liquid of the nano metal wires on a second substrate layer to form a nano metal wire coating;
curing the nano metal wire coating;
patterning the cured nano metal wire coating to form a nano metal wire film layer with a touch array pattern;
and forming a first base material layer on the nano metal wire film layer to obtain the touch layer.
Optionally, the curing treatment of the nano metal wire coating includes:
and pressing the nano metal wire coating by a first pressing plate to form a plurality of first light gathering structures, and curing the nano metal wire coating in the pressing process of the first pressing plate.
Optionally, the coating the nano metal wire mixed solution on a second substrate layer to form a nano metal wire coating includes:
pressing the second base material layer through a second pressing plate to form a plurality of second microstructures;
coating the nano metal wire mixed solution on the second substrate layer to form a nano metal wire coating layer comprising a plurality of second light condensation structures; the second light condensation structure is matched with the second microstructure in shape.
In order to solve the above problem, the present invention further discloses a touch device, including the above touch layer.
Compared with the prior art, the invention has the following advantages:
in the embodiment of the invention, the high-refractive-index polymer can be mixed in the nano metal wire film layer positioned between the first substrate layer and the second substrate layer in the touch layer, so that the refractive index of the nano metal wire film layer can be adjusted, the diffuse reflection of the nano metal wire film layer is weakened, and the haze of the surface of the touch layer is reduced.
Drawings
Fig. 1 shows a schematic cross-sectional view of a conventional nano silver wire touch layer;
fig. 2 is a schematic cross-sectional view illustrating a touch layer according to a first embodiment of the invention;
fig. 3 is a schematic cross-sectional view illustrating another touch layer according to a first embodiment of the invention;
FIG. 4 is a schematic diagram of an optical path according to a first embodiment of the present invention;
fig. 5 is a schematic cross-sectional view illustrating a touch layer according to a first embodiment of the invention;
fig. 6 is a flowchart illustrating a method for manufacturing a touch layer according to a second embodiment of the invention;
fig. 7 is a schematic cross-sectional view illustrating a touch layer after forming a nano metal wire coating according to a second embodiment of the invention;
fig. 8 shows a schematic cross-sectional view of a second substrate layer of example two of the present invention;
fig. 9 is a schematic cross-sectional view illustrating another touch layer after forming a nano-metal wire coating according to a second embodiment of the invention;
fig. 10 is a schematic diagram illustrating a second embodiment of the present invention, in which a plurality of first light-gathering structures are formed on the nano-metal wire coating layer by pressing;
fig. 11 is a schematic diagram illustrating another embodiment of the present invention in which a plurality of first light-gathering structures are formed on a nano-metal wire coating layer by pressing;
FIG. 12 is a schematic view of a first platen according to a second embodiment of the present invention;
fig. 13 is a schematic diagram illustrating the removal of the first pressing plate after pressing according to the second embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Before describing the embodiments of the present invention in detail, the conventional nano metal wire touch layer and the haze problem thereof will be described first.
The following description will take the example of a silver nanowire touch layer with a large volume production. Fig. 1 shows a schematic cross-sectional view of a conventional nano silver wire touch layer, and referring to fig. 1, 11 is a first substrate layer, 12 is a nano silver wire film layer having a touch array pattern with X, Y directions staggered horizontally and vertically, the nano silver wire film layer 12 includes nano silver wires 121, and 13 is a second substrate layer. Fig. 1 illustrates an example of parallel light incident on a nano silver wire touch layer, without considering factors such as secondary refraction and reflection. Since the diameter of the nano silver wire is about 20 to 100nm, the length is 20 to 70um, the aspect ratio is about 1000, and different lengths and different bending forms cause a great amount of diffuse reflection of light on the surface of the nano silver wire, taking the parallel light incident touch layer in fig. 1 as an example, since the surface of the nano silver wire generates a great amount of diffuse reflection, the direction of the emergent light is relatively disordered, which is the reason that the surface of the nano silver film layer shows high haze.
In practical applications, not only the silver nanowire touch layer, but also the touch layer including some other metal nanowires may have a similar high haze problem.
For the problem of high haze of the nano metal wire touch layer, some solutions may also be adopted, for example, a layer of high-reflection or low-reflection film is added on the basis of the nano metal wire touch layer, but this way will increase the thickness of the touch layer additionally, and affect the flexible bending and transmittance of the touch layer. There are also ways to roughen the surface of the nanowires, however, there is no way to effectively control the degree and amount of surface roughening of the nanowires, whether based on the current physical or chemical preparation methods of the nanowires.
In summary, the touch layer, the preparation method thereof and the touch device in the embodiments of the invention are provided for the existing nano metal wire touch layer, so as to solve the problem that the haze of the existing nano metal wire touch layer is large, which easily causes the user to see the screen unclearly.
Example one
Fig. 2 shows a cross-sectional schematic view of a touch layer according to a first embodiment of the present invention, referring to fig. 2, the touch layer includes a first substrate layer 21, a nano metal wire film layer 22 having a touch array pattern, and a second substrate layer 23, the nano metal wire film layer 22 is located between the first substrate layer 21 and the second substrate layer 23, and a high refractive index polymer 222 is mixed in the nano metal wire film layer 22.
Referring to fig. 2, the nano-metal line film layer 22 includes a nano-metal line 221 therein. The nano metal wire film layer 22 is formed on the second substrate layer 23, the nano metal wire film layer 22 is covered by the first substrate layer 21, and the high refractive index polymer 222 is mixed in the nano metal wire film layer 22 positioned between the first substrate layer 21 and the second substrate layer 23.
Alternatively, the high refractive index polymer 222 may include at least one of a polymer of an aromatic monomer and a polymer of a brominated aromatic monomer. For example, a high polymer such as poly (pentabromophenyl methacrylate), etc., and this is not particularly limited in the embodiments of the present invention.
In a specific application, the high refractive index polymer 222 may be a polymer of monomers with excellent light transparency (light transparency > 95%), good hardness and scratch resistance (hardness >2H), and the refractive index of the nano-metal wire film layer 22 can be adjusted by selecting functional monomers of the high refractive index polymer 222.
In the embodiment of the present invention, the high refractive index polymer 222 may be mixed in the nano metal wire film layer 22 of the touch layer, so as to adjust the refractive index of the nano metal wire film layer 22, reduce the diffuse reflection of the nano metal wire film layer 22, and reduce the haze of the surface of the touch layer.
Further, referring to fig. 3, in an optional implementation manner, a plurality of first light-gathering structures 223 are disposed on one side of the nanometal wire film layer 22 close to the first substrate layer 21, a plurality of first microstructures 211 are disposed on one side of the first substrate layer 21 close to the nanometal wire film layer 22, and the first light-gathering structures 223 are matched with the first microstructures 211 in shape.
Optionally, the first light-gathering structure 223 may be a hemispherical convex structure, and of course, may also be a structure with other shapes, such as an elliptical convex structure, which is not specifically limited in this embodiment of the present invention.
Referring to fig. 4, a schematic diagram of an optical path according to a first embodiment of the present invention is shown, taking the parallel light incident touch layer in fig. 4 as an example, because the existence of the high refractive index polymer 222 and the first light collecting structure 223 weakens the diffuse reflection generated by the nano metal wires 221, the emergent light rays can be substantially emitted in parallel, and thus the haze of the surface of the touch layer is reduced.
Referring to fig. 5, in another alternative implementation manner, a plurality of second light concentrating structures 224 are disposed on a side of the nanometal wire film layer 22 close to the second substrate layer 23, a plurality of second microstructures 231 are disposed on a side of the second substrate layer 23 close to the nanometal wire film layer 22, and the shapes of the second light concentrating structures 224 and the second microstructures 231 are matched.
Optionally, the second light concentrating structure 224 is a hemispherical convex structure, but may also be a structure with other shapes, such as an elliptical convex structure, and the like, which is not limited in this embodiment of the present invention.
In the embodiment of the present invention, the position of the light-gathering structure is not limited to the upper surface or the lower surface of the nano metal wire film layer 22, and may be only disposed on the upper surface of the nano metal wire film layer 22, that is, on the side of the nano metal wire film layer 22 close to the first substrate layer 21, or only disposed on the lower surface of the nano metal wire film layer 22, that is, on the side of the nano metal wire film layer 22 close to the second substrate layer 23, or both the upper surface and the lower surface of the nano metal wire film layer 22 are provided with the light-gathering structure, which is not specifically limited in the embodiment of the present invention. In addition, the shapes of the first light collecting structure 223 and the second light collecting structure 224 may be the same or different, and this is not particularly limited in the embodiment of the present invention.
Optionally, at least one of metal oxide nanoparticles, high atomic number monomers and high atomic number polymers may also be mixed in the nano metal wire film layer 22. Referring to fig. 3, 4 or 5, that is, the nano metal wire film layer 22 may be mixed with a substance 225 for increasing the conductivity of the nano metal wire, and the substance such as the metal oxide nanoparticles, the high atomic number monomer and the high atomic number polymer may increase the conductivity of the nano metal wire, so as to increase the touch sensing capability of the touch layer.
Optionally, the nano metal wire film layer 22 includes at least one of a nano silver wire, a nano copper wire and a nano tin wire, that is, in practical applications, the nano metal wire 221 may be at least one of a nano silver wire, a nano copper wire and a nano tin wire, which is not particularly limited in this embodiment of the present invention.
In a specific application, a user may specifically touch the first substrate layer 21 in the touch layer to implement a touch function through the touch array pattern of the touch layer.
In practical applications, the first substrate layer 21 and the second substrate layer 23 may be a PET (polyethylene terephthalate) material layer, an adhesive layer, and the like, which is not particularly limited in the embodiment of the present invention.
In the embodiment of the invention, the high-refractive-index polymer can be mixed in the nano metal wire film layer positioned between the first substrate layer and the second substrate layer in the touch layer, so that the refractive index of the nano metal wire film layer can be adjusted, the diffuse reflection of the nano metal wire film layer is weakened, and the haze of the surface of the touch layer is reduced.
Example two
Fig. 6 is a flowchart illustrating steps of a method for manufacturing a touch layer according to a second embodiment of the present invention, and referring to fig. 6, the method for manufacturing a touch layer according to the second embodiment of the present invention includes the following steps:
step 601: and adding a high-refractive-index polymer into the nano metal wire ink to form a nano metal wire mixed solution.
In this step, the nanowire ink is a nanowire suspension formed by adding the nanowire to a common solvent, wherein the common solvent may be deionized water, alcohols (e.g., methanol, ethanol, and isopropanol), and benzenes (e.g., toluene), and the embodiment of the present invention is not limited thereto.
A high refractive index polymer 222 such as poly (pentabromophenyl methacrylate) may be added to the nanowire ink to form a nanowire mixture.
Optionally, before or after this step, the method may further comprise the steps of: at least one of metal oxide nanoparticles, high atomic number monomers and high atomic number polymers is added to the nano metal wire ink. The metal oxide nanoparticles, the high atomic number monomer and the high atomic number polymer can improve the conductivity of the metal nanowires, so that the touch sensing capability of the touch layer can be improved.
Step 602: and coating the mixed liquid of the nano metal wires on a second substrate layer to form a nano metal wire coating.
In an optional implementation manner in the embodiment of the present invention, referring to fig. 7, the prepared mixed solution of the nano metal wires may be coated on the second substrate layer 23, so as to form the nano metal wire coating 01. The manner of coating the mixed liquid of the metal nanowires is not limited to roll coating, slit coating, spin coating, spray coating, and the like, and is not particularly limited in this embodiment of the present invention.
In a second optional implementation manner, referring to fig. 8, this step may specifically include the following steps: a plurality of second microstructures 231 are formed on the second substrate layer 23 through pressing of the second pressing plate; coating the nano metal wire mixed solution on the second substrate layer 23 to form a nano metal wire coating layer 01 including a plurality of second light condensation structures 224; the second light-concentrating structure 224 matches the shape of the second microstructure 231.
Wherein the second platen comprises a plurality of microstructures that match the shape of the second microstructures 231. Referring to fig. 8, for example, the second microstructure 231 may be a hemispherical concave structure, and accordingly, the microstructure on the second pressing plate may be a hemispherical convex structure matching the shape of the hemispherical concave structure. In a specific application, the second substrate layer 23 may be laminated by a second pressing plate, wherein one surface of the second pressing plate on which the first pressing plate structure is formed is in contact with the second substrate layer 23, so that a plurality of second microstructures 231 may be formed on the second substrate layer 23. Optionally, the second substrate layer 23 formed with a plurality of second microstructures 231 may be cured afterwards to accelerate the shaping of the second microstructures 231. Then, referring to fig. 9, the prepared nano metal wire mixture may be coated on the second substrate layer 23 on which the plurality of second microstructures 231 are formed, to form a nano metal wire coating layer 01 including the plurality of second light concentrating structures 224.
Further optionally, the surface of the first pressing plate structure may be subjected to mirror surface highlight treatment in advance, so that the surface of the second microstructure 231 may be smoother, and diffuse reflection of the touch layer may be reduced. In practical applications, the first platen structure on the second platen may be processed and manufactured by a process such as nano etching, and the embodiment of the present invention does not specifically limit the manufacturing process of the first platen structure.
That is, in one implementation, the second microstructure 231 is not formed on the second substrate layer 23, and accordingly, the second light concentrating structure 224 is not formed on the lower surface of the nano-metal wire coating layer 01. In the second implementation manner, the second microstructure 231 is formed on the second substrate layer 23, and accordingly, the second light-condensing structure 224 is also formed on the lower surface of the nano-metal wire coating layer 01.
The three-dimensional light-gathering microstructure is designed above or below the nano metal wire coating, so that the surface area and the volume of the nano metal wire coating can be increased, the number of the acting nano metal wires can be correspondingly increased, a touch layer electrode with higher conductive capability can be obtained, and the conductive capability of the touch layer is improved.
In addition, in the embodiment of the present invention, there is no high requirement for the thickness of the nano metal wire coating 01, and the required thickness may be made thin or thick according to the desired purpose.
Step 603: and curing the nano metal wire coating.
In this step, the nano metal wire coating 01 may be cured, wherein the curing process is not limited to UV (ultraviolet) curing, infrared curing, heating curing, and the like, and this is not particularly limited in the embodiment of the present invention.
Optionally, referring to fig. 10 or fig. 11, this step may also be implemented by: a plurality of first light gathering structures 223 are formed on the nano metal wire coating 01 by pressing the first pressing plate 02, and the nano metal wire coating 01 is cured during the pressing process of the first pressing plate 02.
Wherein fig. 12 shows a schematic view of a first platen 02, and referring to fig. 12, the first platen 02 comprises a plurality of second platen structures 021 matching the shape of the first light-concentrating structures 223. Referring to fig. 8, for example, the first light collecting structure 223 may be a hemispherical convex structure, and accordingly, the second platen structure 021 on the second platen 02 may be a hemispherical concave structure matching the shape of the hemispherical convex structure. In a specific application, the first pressing plate 02 may be used to perform a pressing process on the nano-metal wire coating 01, wherein one side of the second pressing plate 02 on which the second pressing plate structure 021 is formed is in contact with the nano-metal wire coating 01, so that a plurality of first light-gathering structures 223 may be formed on the nano-metal wire coating 01. While the pressing is performed by the first pressing plate 02, the nano-metal wire coating 01 may be cured, for example, UV-cured using an ultraviolet lamp 03 shown in fig. 10, and after the curing is completed, the first pressing plate 02 above is removed, as shown in fig. 13.
Further optionally, the surface of the second pressure plate structure 021 may be mirror-finished, so that the surface of the first light-gathering structure 223 may be smoother, and the diffuse reflection of the touch layer may be reduced. In practical application, the second pressing plate structure on the first pressing plate may also be processed and manufactured by processes such as nano etching, and the like, so as to obtain a three-dimensional structure layer with a light-gathering effect, that is, the first light-gathering structure.
In the embodiment of the present invention, fig. 10 illustrates a case where the light-gathering structure is formed only on the upper surface of the nano metal line coating, and fig. 11 illustrates a case where the light-gathering structure is formed on both the upper surface and the lower surface of the nano metal line coating, but as shown in fig. 2, the light-gathering structure may also be formed on neither the upper surface nor the lower surface of the nano metal line coating, which is not specifically limited in the embodiment of the present invention.
Step 604: and patterning the cured nano metal wire coating to form a nano metal wire film layer with a touch array pattern.
In this step, the cured nano metal wire coating may be patterned to form a touch array pattern on the cured nano metal wire coating, wherein the touch array pattern is staggered in the X direction and the Y direction, so as to obtain the nano metal wire film layer with the touch array pattern.
Optionally, a touch array pattern may be formed on the cured nano metal wire coating layer specifically by a laser lithography technique, and the forming process of the touch array pattern is not specifically limited in the embodiment of the present invention.
Step 605: and forming a first base material layer on the nano metal wire film layer to obtain the touch layer.
In this step, a first substrate layer 21 may be formed on the nano metal wire film layer, thereby obtaining a touch layer, as shown in fig. 3 or fig. 5.
In the case that the first light-gathering structure is formed on the upper surface of the metal nanowire film layer, the first substrate layer 21 may fill up the gap between the first light-gathering structures under the action of gravity, so that the first substrate layer 21 may form a plurality of first microstructures 211 on the side close to the metal nanowire film layer, that is, form a shape similar to the second pressing plate structure of the first pressing plate 02.
In the embodiment of the invention, the diffuse reflection light of the touch layer can be eliminated by adding the high-refractive-index polymer in the nano metal wire film layer and profiling and curing the nano metal wire coating by the microstructure pressing plate, so that the thickness of the touch layer is not required to be additionally increased, the better flexible bending and transmittance of the touch layer can be ensured, and in addition, the surface roughening degree and the number of the nano metal wires are not required to be controlled.
In the embodiment of the invention, a high-refractive-index polymer can be added into the nano metal wire ink to form a nano metal wire mixed solution, then the nano metal wire mixed solution is coated on the second substrate layer to form a nano metal wire coating, then the nano metal wire coating is cured, then the cured nano metal wire coating is patterned to form a nano metal wire film layer with a touch array pattern, and then the first substrate layer is formed on the nano metal wire film layer to obtain the touch layer. By adding the high-refractive-index polymer into the nano metal wire ink, the refractive index of the nano metal wire film layer can be adjusted, the diffuse reflection of the nano metal wire film layer is weakened, and the haze of the surface of the touch layer is reduced.
EXAMPLE III
The embodiment of the invention also discloses a touch device which comprises the touch layer.
In the embodiment of the invention, the high-refractive-index polymer can be mixed in the nano metal wire film layer positioned between the first substrate layer and the second substrate layer in the touch layer, so that the refractive index of the nano metal wire film layer can be adjusted, the diffuse reflection of the nano metal wire film layer is weakened, and the haze of the surface of the touch layer is reduced.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The touch layer, the preparation method thereof, and the touch device provided by the invention are described in detail above, and the principle and the implementation of the invention are explained in the present document by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. The touch layer is characterized by comprising a first substrate layer, a nano metal wire film layer with a touch array pattern and a second substrate layer, wherein the nano metal wire film layer is positioned between the first substrate layer and the second substrate layer, and a high-refractive-index polymer is mixed in the nano metal wire film layer.
2. The touch layer of claim 1, wherein a plurality of first light-gathering structures are disposed on a side of the nanometal wire film layer close to the first substrate layer, a plurality of first microstructures are disposed on a side of the first substrate layer close to the nanometal wire film layer, and the first light-gathering structures match with the first microstructures in shape.
3. The touch layer of claim 1 or 2, wherein a plurality of second light-concentrating structures are disposed on a side of the metal nanowire film layer close to the second substrate layer, a plurality of second microstructures are disposed on a side of the second substrate layer close to the metal nanowire film layer, and the shapes of the second light-concentrating structures and the second microstructures are matched.
4. The touch layer of claim 2, wherein the first light gathering structure is a hemispherical convex structure.
5. The touch layer of claim 3, wherein the second light concentrating structure is a hemispherical convex structure.
6. The touch layer of claim 1, wherein the nano metal wire film layer further comprises at least one of metal oxide nanoparticles, high atomic number monomers, and high atomic number polymers.
7. The touch layer of claim 1, wherein the high refractive index polymer comprises at least one of a polymer of an aromatic monomer and a polymer of a brominated aromatic monomer.
8. The touch layer of claim 1, wherein the nano-metal wire film layer comprises at least one of nano-silver wires, nano-copper wires, and nano-tin wires.
9. A preparation method of a touch layer is characterized by comprising the following steps:
adding a high-refractive-index polymer into the nano metal wire ink to form a nano metal wire mixed solution;
coating the mixed liquid of the nano metal wires on a second substrate layer to form a nano metal wire coating;
curing the nano metal wire coating;
patterning the cured nano metal wire coating to form a nano metal wire film layer with a touch array pattern;
and forming a first base material layer on the nano metal wire film layer to obtain the touch layer.
10. The method of claim 9, wherein the curing the nanometal wire coating comprises:
and pressing the nano metal wire coating by a first pressing plate to form a plurality of first light gathering structures, and curing the nano metal wire coating in the pressing process of the first pressing plate.
11. The method of claim 9 or 10, wherein the step of coating the nano-metal wire mixture on a second substrate layer to form a nano-metal wire coating comprises:
pressing the second base material layer through a second pressing plate to form a plurality of second microstructures;
coating the nano metal wire mixed solution on the second substrate layer to form a nano metal wire coating layer comprising a plurality of second light condensation structures; the second light condensation structure is matched with the second microstructure in shape.
12. A touch device comprising the touch layer according to any one of claims 1 to 8.
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