CN106553789B - intelligent screen film and preparation method thereof - Google Patents
intelligent screen film and preparation method thereof Download PDFInfo
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- CN106553789B CN106553789B CN201610881801.2A CN201610881801A CN106553789B CN 106553789 B CN106553789 B CN 106553789B CN 201610881801 A CN201610881801 A CN 201610881801A CN 106553789 B CN106553789 B CN 106553789B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B33/00—Packaging articles by applying removable, e.g. strippable, coatings
- B65B33/02—Packaging small articles, e.g. spare parts for machines or engines
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Abstract
The invention discloses an intelligent screen film, which comprises: the PET membrane, the PET membrane has functional coating as the one side on cell-phone intelligence pad pasting surface, and the another side is equipped with graphite alkene conductive film, graphite alkene conductive film and the laminating of AB glue film, and wherein, the AB glue film indicates to be equipped with different glue films respectively at the two sides of PET membrane, and the A face is the one side of PET and the laminating of graphite alkene layer, is equipped with the acrylic ester adhesive, and the B face is the one side with the screen laminating, is equipped with silica gel system light adhesive. Compared with the traditional ITO three-layer structure intelligent protective film, the intelligent adhesive film has better advantages in the aspects of thickness, bending resistance (the film can be repeatedly adhered on the intelligent mobile phone) and the like, obtains an ultrathin functional protective film, and solves the problems that the whole thickness of the protective film is too thick and a conductive area shields touch control icons or touch control points in a display screen window area.
Description
Technical Field
the invention relates to an intelligent screen pasting film and a preparation method thereof, and belongs to the research field of optical-grade protective films.
Background
in recent years, portable electronic product technology and market development are rapid, and particularly, development of smart phones is prominent. The smart phone is very popular among smart phone consumers by attaching a protective film on the surface of the smart phone. The smart phone protective film has multiple functions, such as screen burst prevention, fingerprint prevention, scratch prevention, dazzling prevention, blue light prevention and the like.
the iphone series mobile phone developed by apple in the united states is one of the most popular smart phones of consumers at present, and adopts an IOS operating system independently developed by apple. Another android system developed by Google, USA, which is driven by the IOS operating system, is also very popular in the field of smart phones.
Compared with the android system mobile phone, the iPhone series mobile phone adopting the IOS system does not have an entity key or a virtual key with a return/confirmation function arranged below the mobile phone, which causes inconvenience in operating the iPhone large-screen mobile phone, such as difficulty in realizing one-hand operation. The virtual key is a key without a key, and the key function is achieved through finger touch.
The functional protective film (plastic structure) of the existing iphone series mobile phone has the following defects:
1. the thickness of the protective film is thicker, so that good aesthetic feeling can not be achieved after the protective film is attached; at present, the functional protective film of a plastic structure mainly has a three-layer PET structure. Referring to fig. 1, the uppermost layer is a PET layer 3 having fingerprint/glare/scratch prevention functions; the middle part is a PET layer 1 attached with a patterned ITO film, so that the electrical functionality is realized; the lower layer is a PET layer 4 (also called AB glue layer) coated with silica gel and acrylic glue (AB glue) on both sides; the PET layer 1 attached with the patterned ITO film and the PET layer 3 with the fingerprint prevention/anti-dazzling/anti-scratching functions are bonded together through an OCA optical cement 2. The total thickness of the layer 1 is generally about 50 μm; the surface of the layer 3 is generally provided with a scratch-resistant hardened coating which has the special functions of fingerprint resistance, dazzling resistance, blue light resistance and the like; the OCA layer 2 is typically 25 μm or 50 μm; the middle of the layer 4 is PET 41, the A surface of the PET 41 is provided with an acrylate adhesive 42, and the B surface of the PET 41 is provided with a silica gel light adhesive 43, and the specific structure is shown in figure 2. It can be seen that the total thickness of the ITO intelligent film generally reaches more than 250 μm, and the ITO intelligent film is much higher than the surface of a mobile phone after being attached to the surface of the mobile phone, so that the ITO intelligent film has no special advantages in aesthetic feeling and hand feeling compared with a glass structure;
2. the transparent conductive film is made of Indium Tin Oxide (ITO) material, and is fragile during cutting/punching, so that edge lead (conductive area) wiring needs to be far away from the edge, a phenomenon of shielding a touch icon or a touch point on a display screen can occur, an insensitivity or failure phenomenon occurs in a local area during normal touch operation of a mobile phone, and actual operation experience is seriously influenced.
Disclosure of Invention
the invention aims to provide a screen intelligent adhesive film taking graphene as a conductive film, which is thinner and more sensitive, aiming at the defects of the prior art;
the invention also aims to provide a preparation method of the intelligent screen pasting film.
the purpose of the invention is realized by the following technical scheme:
a screen smart sticker comprising: one surface of the PET film, which is used as the surface of the mobile phone intelligent adhesive film, is provided with a functional coating, the other surface is provided with a graphene conductive film, the graphene conductive film is adhered to the AB adhesive layer,
Wherein, the AB glue film is that the two sides at the PET membrane are equipped with different glue films respectively, and A face is the one side of PET and graphite alkene layer laminating, is equipped with the acrylic ester adhesive, and B face is the one side of laminating with the screen, is equipped with the light adhesive of silica gel system.
Preferably, the thickness of the screen intelligent film is less than 200 μm, preferably 100 μm.
Preferably, the graphene layer electrical film is patterned single-layer graphene or multi-layer graphene, preferably single-layer graphene.
preferably, the screen is an iphone series mobile phone screen of an IOS system, and the pattern of the graphene layer of the screen smart sticker includes:
The touch area is arranged in a non-window area below the screen and used for receiving human body static electricity;
The trigger area is arranged in the screen window area and is contacted with the virtual return key at the upper left corner or the virtual function key at the upper right corner;
And the conduction area is arranged on the edge of the left side or the right side of the screen and is connected with the touch area and the trigger area.
the touch area has a sufficient width to make sufficient contact with a finger.
preferably, the width of the conductive area is 0.1-5mm, for example: 0.1mm, 0.2mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 2mm, 2.5mm, 2.8mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, and the like. Preferably 1mm, which ensures the conductivity of the leads and reduces the shielding problems by design. When a conducting area passes through a small icon in a display screen (screen window area), if the difference of the icon area relative to the shielding area of the conducting area is not large, poor touch phenomenon (no response or slow response when the icon is clicked) is easy to generate, so that the smaller the width of the conducting area is, the better the conducting area is on the basis of ensuring the conductivity. Current ITO intelligence pad pasting, because ITO takes place the chap problem easily when the cutting, as the conduction district of connecting trigger district and touch area, in order to avoid the damage of conduction district during the cutting, generally need design more than keeping away from marginal 5mm, edge (the ink district that shelters touch panel lead electrode) all is generally less than 5mm about current cell-phone, consequently, the conduction district of ITO intelligence pad pasting will go deep into display screen window district, can lead to the conduction district unavoidably to shield touch icon or touch-control point on some display screens like this, thereby can cause the local insensitivity when normal operation on the display screen, local malfunctioning touch phenomenon even. According to the invention, single-layer or double-layer graphene is adopted to replace a thick ITO/PET film, so that the flexibility is good, the problems of breakage and the like of a graphene conductive film are not easily caused during cutting, and the conductive area is ensured not to have any influence on a window area.
A preparation method of the intelligent screen film comprises the following steps:
transferring graphene: transferring one or more layers of graphene on the non-surface side of the PET film, preferably transferring one layer of graphene;
patterning: patterning the graphene film;
And (3) attaching an AB adhesive layer: the AB glue layer is formed by respectively arranging different glue layers on two sides of a PET film, wherein the surface A is the surface of the PET film, which is attached to a graphene layer, and is provided with an acrylate adhesive, and the surface B is the surface of the PET film, which is attached to a screen, and is provided with a silica gel light adhesive;
The sequence of the above steps is: transferring graphene → patterning → attaching an AB glue layer, or transferring graphene → attaching an AB glue layer → patterning.
in the graphene transferring process, the adopted PET film has a functional coating with fingerprint prevention, scratch prevention, blue light prevention and/or anti-dazzling effects as one surface of the intelligent film pasting surface. Preferably, the surface scratch-resistant effect of the PET film meets the condition that the surface hardness is more than or equal to 1H. And transferring the graphene film on the reverse side (inner side) of the PET scratch-resistant surface, namely the surface adhered with the AB glue layer.
The method for transferring the graphene adopts a thermal release tape transfer method, an electrostatic transfer method or an adhesive method, and preferably adopts an electrostatic transfer method.
Thermal release tape transfer, Nature nanotechnology 2010,5(8):574-578, uses a glue film to transfer CVD-grown graphene from a growth substrate to a target substrate.
The electrostatic transfer method is described in Chinese invention patent, application number: 201210269206.5, 201410238058. X.
Adhesives, see Applied Physics Letters,2013,102(2):023112.
According to the invention, the electrostatic transfer method is preferably used for transferring graphene, and the research of the inventor finds that the electrostatic transfer method is more suitable for the large-size/clean transfer of the invention, the method has no adhesive residue, meets the requirements of optical products, and is more beneficial to the subsequent patterning process.
the patterning adopts a direct-writing laser etching process, a yellow light process or a sacrificial layer method.
Direct-write laser etching: and adjusting laser parameters by adopting a direct-writing laser etching scheme to ensure that the graphene film is ablated/peeled off by laser, wherein the scheme is an optimal scheme.
The yellow light process comprises the following steps: the method comprises the steps of coating photoresist or pressing a photosensitive dry film on the surface of a graphene film by adopting a yellow light process scheme, forming a patterned photoresist/dry film by adopting a standard yellow light process in a micro-machining technology, removing graphene to be patterned by adopting an oxygen plasma etching technology, and finally removing the photoresist and cleaning to obtain a target pattern.
sacrificial layer method: printing a layer of peelable glue/hydrosol (sacrificial layer) on the surface of the PET of the graphene film to be transferred, or forming a layer of photoresist/dry film fine pattern (sacrificial layer) by adopting a yellow light scheme, then transferring the graphene film, and finally removing the material of the sacrificial layer and cleaning to obtain the graphene patterned structure.
preferably, the direct-write laser etching process is carried out, and further preferably, infrared laser with the power of 20-30W and the wavelength of 1064nm is adopted for carrying out direct-write laser scanning one or more times, preferably once.
Further preferably, a suspension block processing mode is adopted in the design of the etching pattern. Namely, on the basis that the whole blocky graphene from the touch area, the conduction area to the trigger area needs to be reserved, the graphene in other areas (called as etching areas in the invention) is not removed integrally, but is broken, and the phenomenon that the original touch function of the display screen is shielded and interfered when the areas are touched is ensured. Referring to fig. 5, the etched region is not completely etched, a blank space is required to be etched, some fragmented graphene remains, the residual fragmented graphene in fig. 5 forms an inclined parallel line shape, and other patterns may also be used, such as cross-shaped grids horizontal and vertical to the edge of the screen, or inclined grids not horizontal and vertical to the edge of the screen, or loose dots with a certain rule, and so on.
Further preferably, the etching area adopts a cross square grid, an oblique square grid pattern or a parallel line strip pattern; it is further preferred to use a pattern of parallel line stripes. Referring to fig. 5, a schematic diagram of a parallel line stripe pattern is shown.
preferably, the distance between adjacent parallel lines making up a checkerboard, cross-checkerboard or parallel line bar pattern is from 0.001 to 5mm, for example: 0.001mm, 0.005mm, 0.01mm, 0.02mm, 0.05mm, 0.08mm, 0.1mm, 0.3mm, 0.5mm, 0.7mm, 1mm, 2mm, 3mm, 4mm, 5mm, etc.; preferably 0.4 mm. The accurate line distance of the invention can not only ensure that the original touch control function of the display screen is not shielded and interfered when the areas are touched, but also reduce the Moire phenomenon between the periodic etched pattern and the pixel points of the display screen of the screen.
as the most preferable scheme of the preparation method of the invention, the method adopts the following steps: transferring graphene → attaching an AB glue layer → patterning: and patterning the graphene film by adopting a laser direct writing process. Namely, after the graphene film is bonded with the AB glue, laser etching treatment is carried out, and the graphene functional protective film provided by the invention can be obtained. By optimizing the process steps, the time of exposing the graphene film in the air can be reduced, and the dust falling amount on the surface of the graphene film is reduced. Because the graphene is difficult to remove surface dust by adopting the same operation method similar to that in ITO production, such as alcohol wiping, dust removal of a dust sticking film and the like, the yield can be improved by 20% by adopting the optimal scheme compared with the scheme of firstly patterning and then attaching the AB glue layer. The invention is a further important breakthrough on the basis that graphene is used as a conductive layer for intelligent film pasting.
The principle of the invention is as follows:
Aiming at the problems of large thickness, insufficient sensitivity and ITO (indium tin oxide) in the existing intelligent film, the graphene film is adopted to replace the ITO film as a functional layer conductive material, so that the two problems are solved:
1. On the basis of the existing protective film with a three-layer PET structure, the graphene film is directly arranged on the inner side of the uppermost PET layer, namely the back side of the functional layers such as fingerprint prevention, dazzling prevention, scratch prevention and the like, the middle layer is removed, and the graphene film is directly attached to the AB glue layer to form a two-layer PET structure, so that the overall thickness of the protective film can be controlled to be below 200 mu m, even to be 100 mu m, and the ultrathin mobile phone protective film can be obtained;
2. By adopting the graphene transparent conductive film, due to the extremely excellent flexibility, cracks and other phenomena cannot be generated during cutting and punching, so that the conductive area can be close to the edge, and the bad touch phenomenon caused by the fact that the conductive area shields the touch icon in the window area of the display screen is solved.
The invention has the beneficial effects that:
The invention aims to solve the problems of too thick thickness and poor functionality of a functional protective film (plastic structure) of a mobile phone of an IOS operating system, adopts a graphene transparent conductive film and a double-layer PET structure, directly forms the graphene transparent conductive film on a fingerprint-proof film, completes the assembly of a product by a simple laser pattern processing method and a bonding process, and forms a simpler double-layer structure intelligent protective film. Compared with the traditional ITO three-layer structure intelligent protective film, the intelligent adhesive film has better advantages in the aspects of thickness, bending resistance (the film can be repeatedly adhered on the intelligent mobile phone) and the like, obtains the ultrathin functional protective film, and solves the problems that the whole thickness of the protective film is too thick and a conduction area shields touch control icons in a display screen window area, namely the conduction area shields the touch control icons (also called virtual keys) in the display screen touch function area (window area) to cause poor touch. The specific beneficial effects are summarized as follows:
1. Compared with an ITO thin film protection paste, the ITO thin film protection paste has no edge shielding effect;
2. according to the intelligent film disclosed by the invention, graphene is adopted as a conductive material to be directly transferred onto the PET on the surface layer, so that the flexibility is better, functional problems can not occur during repeated lamination, namely, the problems of fracture and the like during repeated lamination like ITO can not occur, and the reliability of a product is improved;
3. The invention adopts a double-layer PET structure, solves the problem that the existing protective film is too thick, and ensures that consumers have very good use experience.
description of the drawings:
FIG. 1 is a schematic diagram of an ITO intelligent film structure pointed out in the background art;
FIG. 2 is a schematic view of the structure of the AB glue layer;
FIG. 3 is a flow chart of the process of the present invention (examples 1, 2);
FIG. 4 is a flow chart of the method of the present invention (examples 3, 4);
fig. 5 is a schematic view of a graphene patterned shape;
Wherein, 1-PET layer attached with patterned ITO film, 2-OCA optical cement, 3-PET film containing functional surface coating; 4-AB glue layer, 41-middle PET, 42-acrylate adhesive, 43-silica gel light adhesive, 5-graphene, 51-touch area, 52-trigger area and 53-conduction area.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1:
An intelligent protective film and a manufacturing method thereof, referring to fig. 3, comprises the following steps:
(1) transferring graphene 5 on the back of the anti-fingerprint coating of the anti-fingerprint PET film 3 by using an electrostatic transfer method, wherein the number of graphene layers is single-layer or double-layer;
(2) Performing laser etching treatment on the graphene 5 formed in the step (1) by adopting a laser direct writing etching process to directly form a pattern of the graphene transparent conductive film, wherein the patterned shape is as shown in fig. 5 and comprises a touch area 51 and a trigger area 52, the touch area 51 and the trigger area 52 are connected through a conduction area 53, and the left and right patterned graphene patterns can be arranged only on the left side or the right side or can be arranged simultaneously;
(3) Attaching the AB adhesive layer 4 to enable one surface of the AB adhesive acrylate adhesive 41 to be attached to the surface of the graphene 5;
(4) And carrying out laser cutting or punching on the product with the complete structure (large typesetting) to obtain the single intelligent protective film with the complete functional structure.
in the direct-writing laser etching process, infrared laser with the power of 25W and the wavelength of 1064nm is adopted for direct-writing laser scanning once, and a suspension block processing mode is adopted in the design of an etching pattern. Namely, on the basis that the whole blocky graphene from the touch area, the conduction area to the trigger area needs to be reserved, the graphene in other areas (called as etching areas in the invention) is not removed integrally, but is broken, and the phenomenon that the original touch function of the display screen is shielded and interfered when the areas are touched is ensured. Referring to fig. 5, the etching region is not completely etched, a complete blank is to be etched, some fragmented graphene remains, and the residual fragmented graphene in fig. 5 forms an inclined parallel line shape, and may be other patterns. The present embodiment employs an oblique checkered pattern.
the thickness of the obtained smart sticker was 100 μm, and the width of the conductive region 53 was 0.1 mm. Through testing, normal touch operation is carried out in a window area of the display screen, and no response slowness or failure phenomenon is caused when a touch icon or a touch point of the display screen is pressed; the thumb and the abdomen of the thumb are used for touching the touch area of the intelligent adhesive film, and the 100% touch reaction is realized in the trigger area.
Example 2:
An intelligent protective film and a manufacturing method thereof, referring to fig. 3, comprises the following steps:
(1) transferring graphene 5 on the back of the anti-fingerprint coating of the anti-fingerprint PET film 3 by using an adhesive method, wherein the number of graphene layers is a single layer;
(2) Etching the graphene 5 formed in the step (1) by adopting a yellow light etching process to directly form a pattern of the transparent conductive graphene film, wherein the patterned shape is as shown in fig. 5 and comprises a touch area 51 and a trigger area 52, the touch area 51 and the trigger area 52 are connected through a conductive area 53, and the left and right patterned graphene patterns can be arranged only on the left side or the right side or can be arranged simultaneously;
(3) attaching the AB adhesive layer 4 to enable one surface of the AB adhesive acrylate adhesive 41 to be attached to the graphene 5;
(4) And carrying out laser cutting or punching on the product with the complete structure (large typesetting) to obtain the single intelligent protective film with the complete functional structure.
in the etching process, a suspension block processing mode is adopted in the design of an etching pattern. Namely, on the basis that the whole blocky graphene from the touch area, the conduction area to the trigger area needs to be reserved, the graphene in other areas (called as etching areas in the invention) is not removed integrally, but is broken, and the phenomenon that the original touch function of the display screen is shielded and interfered when the areas are touched is ensured. Referring to fig. 5, the etching region is not completely etched, a complete blank is to be etched, some fragmented graphene remains, and the residual fragmented graphene in fig. 5 forms an inclined line shape, or may be another pattern. In this embodiment, an oblique grid pattern is adopted, and the distance between adjacent parallel lines forming the oblique grid pattern is 1 mm.
The resulting smart patch had a thickness of 150 μm and a width of the conductive region 53 of 5 mm. Through testing, normal touch operation is carried out in a window area of the display screen, and no response slowness or failure phenomenon is caused when a touch icon or a touch point of the display screen is pressed; the thumb and the abdomen of the thumb are used for touching the touch area of the intelligent adhesive film, and the 100% touch reaction is realized in the trigger area.
Example 3:
an optimized smart protective film and a manufacturing method thereof, referring to fig. 4, comprises the following steps:
(1) Transferring graphene 5 on the back of the anti-fingerprint coating of the anti-fingerprint PET film 3 by using an electrostatic transfer method, wherein the number of graphene layers is single-layer or double-layer;
(2) attaching the AB adhesive layer 4 to enable one surface (see figure 2) of the AB adhesive layer acrylate adhesive 41 to be attached to the graphene 5, and protecting the graphene film;
(3) performing laser etching treatment on the graphene film formed in the step (2) through the anti-fingerprint film by adopting a laser direct writing etching process on the anti-fingerprint film surface, and directly forming a pattern of the graphene transparent conductive film, wherein the patterning shape is as shown in fig. 5 and comprises a touch area 51 and a trigger area 52, the touch area 51 and the trigger area 52 are connected through a conduction area 53, and the left and right patterned graphene patterns can be only arranged on the left side or the right side or can be arranged simultaneously;
(4) and carrying out laser cutting or punching on the product with the complete structure (large typesetting) to obtain the single intelligent protective film with the complete functional structure.
The direct-writing laser etching process adopts infrared laser with power of 20-30W and wavelength of 1064nm to perform direct-writing laser scanning once. A suspension block processing mode is adopted in the design of the etching pattern. Namely, on the basis that the whole blocky graphene from the touch area, the conduction area to the trigger area needs to be reserved, the graphene in other areas (called as etching areas in the invention) is not removed integrally, but is broken, and the phenomenon that the original touch function of the display screen is shielded and interfered when the areas are touched is ensured. Referring to fig. 5, the etching region is not completely etched, a complete blank is to be etched, some fragmented graphene remains, and the residual fragmented graphene in fig. 5 forms an inclined parallel line shape, and may be other patterns. In the embodiment, inclined parallel lines are adopted, and the distance between the parallel lines is 0.4 mm.
the thickness of the obtained smart sticker was 90 μm, and the width of the conductive area 53 was 1 mm. Through testing, normal touch operation is carried out in a window area of the display screen, and no response slowness or failure phenomenon is caused when a touch icon or a touch point of the display screen is pressed; the thumb and the abdomen of the thumb are used for touching the touch area of the intelligent adhesive film, and the 100% touch reaction is realized in the trigger area.
example 4:
an optimized smart protective film and method of manufacture comprising the steps of (figure 4):
(1) transferring graphene 5 on the back of the anti-fingerprint coating of the anti-fingerprint PET film 3 by using an adhesive method, wherein the number of graphene layers is a single layer;
(2) attaching the AB glue layer 4, so that one surface (see fig. 2) of the AB glue layer acrylate adhesive 41 is attached to the graphene surface, and the graphene film is protected;
(3) performing laser etching treatment on the graphene film formed in the step (2) through the anti-fingerprint film by adopting a laser direct writing etching process on the anti-fingerprint film surface, and directly forming a pattern of the graphene transparent conductive film, wherein the patterning shape is as shown in fig. 5 and comprises a touch area 51 and a trigger area 52, the touch area 51 and the trigger area 52 are connected through a conduction area 53, and the left and right patterned graphene patterns can be only arranged on the left side or the right side or can be arranged simultaneously;
(4) And carrying out laser cutting or punching on the product with the complete structure (large typesetting) to obtain the single intelligent protective film with the complete functional structure.
The direct-writing laser etching process adopts infrared laser with power of 20W and wavelength of 1064nm to perform direct-writing laser scanning twice. A suspension block processing mode is adopted in the design of the etching pattern. Namely, on the basis that the whole blocky graphene from the touch area, the conduction area to the trigger area needs to be reserved, the graphene in other areas (called as etching areas in the invention) is not removed integrally, but is broken, and the phenomenon that the original touch function of the display screen is shielded and interfered when the areas are touched is ensured. Referring to fig. 5, the etching region is not completely etched, a complete blank is to be etched, some fragmented graphene remains, and the residual fragmented graphene in fig. 5 forms an inclined parallel line shape, and may be other patterns. In this embodiment, a grid pattern is adopted, and the distance between adjacent parallel lines forming the grid is 5 mm.
the thickness of the resulting smart patch was 120 μm and the width of the conductive region 53 was 0.5 mm. Through testing, normal touch operation is carried out in a window area of the display screen, and no response slowness or failure phenomenon is caused when a touch icon or a touch point of the display screen is pressed; the thumb and the abdomen of the thumb are used for touching the touch area of the intelligent adhesive film, and the 100% touch reaction is realized in the trigger area.
Example 5:
an optimized smart protective film and method of manufacture comprising the steps of (figure 4):
(1) transferring graphene 5 on the back of the anti-fingerprint coating of the anti-fingerprint PET film 3 by using an adhesive method, wherein the number of graphene layers is a single layer;
(2) Attaching the AB glue layer 4, so that one surface (see fig. 2) of the AB glue layer acrylate adhesive 41 is attached to the graphene surface, and the graphene film is protected;
(3) performing laser etching treatment on the graphene film formed in the step (2) through the anti-fingerprint film by adopting a laser direct writing etching process on the anti-fingerprint film surface, and directly forming a pattern of the graphene transparent conductive film, wherein the patterning shape is as shown in fig. 5 and comprises a touch area 51 and a trigger area 52, the touch area 51 and the trigger area 52 are connected through a conduction area 53, and the left and right patterned graphene patterns can be only arranged on the left side or the right side or can be arranged simultaneously;
(4) And carrying out laser cutting or punching on the product with the complete structure (large typesetting) to obtain the single intelligent protective film with the complete functional structure.
The direct-writing laser etching process adopts infrared laser with power of 25W and wavelength of 1064nm to perform direct-writing laser scanning twice. A suspension block processing mode is adopted in the design of the etching pattern. Namely, on the basis that the whole blocky graphene from the touch area, the conduction area to the trigger area needs to be reserved, the graphene in other areas (called as etching areas in the invention) is not removed integrally, but is broken, and the phenomenon that the original touch function of the display screen is shielded and interfered when the areas are touched is ensured. Referring to fig. 5, the etching region is not completely etched, a complete blank is to be etched, some fragmented graphene remains, and the residual fragmented graphene in fig. 5 forms an inclined parallel line shape, and may be other patterns. The embodiment adopts inclined parallel lines and strips, the lines are parallel to each other, and the distance between the adjacent lines is 0.001 mm.
the thickness of the resulting smart sticker was 100 μm, and the width of the conductive region 53 was 2 mm. Through testing, normal touch operation is carried out in a window area of the display screen, and no response slowness or failure phenomenon is caused when a touch icon or a touch point of the display screen is pressed; the thumb and the abdomen of the thumb are used for touching the touch area of the intelligent adhesive film, and the 100% touch reaction is realized in the trigger area.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (18)
1. the utility model provides a screen intelligence pad pasting which characterized in that: the method comprises the following steps: one surface of the PET film, which is used as the surface of the mobile phone intelligent adhesive film, is provided with a functional coating, the other surface is provided with a graphene conductive film, the graphene conductive film is adhered to the AB adhesive layer,
The AB glue layer is formed by respectively arranging different glue layers on two sides of a PET film, wherein the surface A is the surface of the PET film, which is attached to a graphene layer, and is provided with an acrylate adhesive, and the surface B is the surface of the PET film, which is attached to a screen, and is provided with a silica gel light adhesive;
The thickness of the intelligent screen pasting film is below 200 mu m;
the graphene conductive film is patterned single-layer graphene or multi-layer graphene;
The graphene conductive film is patterned graphene;
the pattern of the graphene layer of the screen smart sticker includes:
the touch area is arranged in a non-window area below the screen and used for receiving human body static electricity;
the trigger area is arranged in the screen window area and is contacted with the virtual return key at the upper left corner or the virtual function key at the upper right corner;
The conduction area is arranged at the edge of the left side or the right side of the screen and is connected with the touch area and the trigger area;
the etching area adopts a cross-shaped checkered pattern, an oblique checkered pattern or a parallel line strip pattern;
the distance between adjacent parallel lines forming the cross square grids, the oblique square grid patterns or the parallel line strips is 0.001-5 mm.
2. the screen intelligent sticker of claim 1, wherein: the thickness of the intelligent screen pasting film is 100 mu m.
3. The screen intelligent sticker of claim 1, wherein: the graphene electric film is patterned single-layer graphene.
4. the screen intelligent sticker of claim 1, wherein: the screen is an iphone series mobile phone screen of the IOS system.
5. The screen intelligent sticker of claim 1, wherein: the width of the conduction region is 0.1-5 mm.
6. the screen intelligent sticker of claim 5, characterized in that: the width of the conductive region is 1.0 mm.
7. the method for preparing the intelligent screen pasting film according to any one of claims 1 to 6, wherein: the method comprises the following steps:
Transferring graphene: transferring one or more layers of graphene on the non-surface side of the PET film;
Patterning: patterning the graphene film;
and (3) attaching an AB adhesive layer: the AB glue layer is formed by respectively arranging different glue layers on two sides of a PET film, wherein the surface A is the surface of the PET film, which is attached to a graphene layer, and is provided with an acrylate adhesive, and the surface B is the surface of the PET film, which is attached to a screen, and is provided with a silica gel light adhesive;
The sequence of the above steps is: transferring graphene → patterning → attaching an AB glue layer, or transferring graphene → attaching an AB glue layer → patterning.
8. The method for preparing the intelligent screen pasting film according to claim 7, characterized in that: in the graphene transferring process, the adopted PET film has a functional coating with fingerprint prevention, scratch prevention, blue light prevention and/or anti-dazzling effects as one surface of the intelligent film pasting surface.
9. The method for preparing the intelligent screen pasting film according to claim 7, characterized in that: the method for transferring graphene adopts a thermal release tape transfer method, an electrostatic transfer method or an adhesive method.
10. The method for preparing the intelligent screen pasting film according to claim 9, characterized in that: the method for transferring graphene adopts an electrostatic transfer method.
11. The method for preparing the intelligent screen pasting film according to claim 7, characterized in that: the patterning adopts a direct-writing laser etching process, a yellow light process or a sacrificial layer method.
12. The method for preparing the intelligent screen pasting film according to claim 11, wherein the method comprises the following steps: the patterning adopts a direct-writing laser etching process.
13. The method for preparing the intelligent screen pasting film according to claim 11, wherein the method comprises the following steps: the patterning adopts infrared laser with the power of 20-30w and the wavelength of 1064nm to carry out direct-writing laser scanning once or for many times.
14. The method for preparing the intelligent screen pasting film according to claim 13, wherein the method comprises the following steps: the infrared laser performs direct-write laser scanning once.
15. the method for preparing the intelligent screen pasting film according to claim 11, wherein the method comprises the following steps: a suspension fast processing mode is adopted in the design of the etching pattern.
16. the method for preparing the intelligent screen pasting film according to claim 15, wherein the method comprises the following steps: the etched areas are in a pattern of parallel lines.
17. the method for preparing the intelligent screen pasting film according to claim 7, characterized in that: the distance between adjacent parallel lines forming the cross square, the oblique square grid pattern or the parallel line strip is 0.4 mm.
18. the method for preparing the intelligent screen pasting film according to claim 7, characterized in that: transferring graphene → attaching an AB glue layer → patterning: and patterning the graphene film by adopting a laser direct writing process.
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| CN110387196A (en) * | 2019-07-30 | 2019-10-29 | 佐珍珍 | A kind of customized shortcut function film and production method |
| CN114730109A (en) * | 2019-12-17 | 2022-07-08 | 浙江精一新材料科技有限公司 | Suspended particle light valve with protective layer |
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Address after: 213100 floor 1, building 4, No. 6, Xiangyun Road, West Taihu science and Technology Industrial Park, Changzhou City, Jiangsu Province Patentee after: Changzhou sixth element Semiconductor Co.,Ltd. Address before: No. 518-5 Zhonghui Road, Standard Factory Building of Chang'an Industrial Park, Huishan Economic Development Zone, Wuxi City, Jiangsu Province, 214000 Patentee before: WUXI SIXTH ELEMENT ELECTRONIC FILM TECHNOLOGY Co.,Ltd. |