CN210401927U - PDLC (polymer dispersed liquid crystal) light adjusting film containing nano silver wire transparent conductive film - Google Patents
PDLC (polymer dispersed liquid crystal) light adjusting film containing nano silver wire transparent conductive film Download PDFInfo
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- CN210401927U CN210401927U CN201921494019.0U CN201921494019U CN210401927U CN 210401927 U CN210401927 U CN 210401927U CN 201921494019 U CN201921494019 U CN 201921494019U CN 210401927 U CN210401927 U CN 210401927U
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Abstract
The utility model relates to a PDLC (polymer dispersed liquid crystal) dimming film containing a nano silver wire transparent conductive film. The product included a PET1 layer, a first layer of nanosilver, a PDLC layer, a second layer of nanosilver, and a PET2 layer. Is characterized in that the first nano-silver layer or the second nano-silver layer is etched once by a laser etching machine, and completely same etching lines are formed at the same time; and the first silver nanowire layer and the second silver nanowire layer are simultaneously formed into a first silver nanowire layer independent subarea and a second silver nanowire layer independent subarea which have the same shape and size and are mutually overlapped and correspond. The function of displaying patterns and/or characters by the light modulation film is realized by controlling the electrodes arranged on the first nano silver wire layer independent subarea and the second nano silver wire layer independent subarea respectively. The technical proposal of the utility model overcomes the defects of long process, difficult operation and low yield in the prior art; the operability of the product is improved, the electrode control system is simplified, and the display capability of patterns and characters of the product is improved.
Description
Technical Field
The utility model relates to a laser etching field, concretely relates to PDLC liquid crystal membrane of adjusting luminance that contains nanometer silver-colored line transparent conductive film.
Background
The PDLC Liquid Crystal film (Polymer Dispersed Liquid Crystal) is an optical film manufactured by the Liquid Crystal Polymer technology (PDLC) of the utility model. The technology mainly applies the switching of the macroscopic states of light transmission and light scattering by controlling the arrangement state of the liquid crystal through an electric field after the nematic liquid crystal and the molecular polymer are mixed so as to change the refractive index of the liquid crystal.
In the prior art, the preparation of the PDLC liquid crystal light modulation film generally comprises the steps of preparing an ITO coating on a PET film, producing a flexible, transparent and conductive PET-ITO film, uniformly coating a layer of Polymer Dispersed Liquid Crystal (PDLC) between the two PET-ITO films, and performing light or heat curing to prepare the PDLC light modulation film.
When the PDLC light adjusting film is electrified (in an ON state), liquid crystal molecules are orderly arranged under the action of an electric field, the refractive indexes of the molecular polymer and the liquid crystal material tend to be consistent, light scattering is greatly inhibited, and the PDLC light adjusting film is in a colorless and transparent state; when the PDLC light adjusting film is powered OFF (OFF state), liquid crystal molecules are in disordered orientation, the refractive indexes of the molecular polymer and the liquid crystal material are mismatched, the PDLC light adjusting film generates strong light scattering, and the appearance is milky white, colorful or black and is opaque.
When the PDLC liquid crystal dimming film is delivered from a dimming film manufacturer, for example, the new material science and technology company Limited in the Zhuhai industry, the PDLC liquid crystal dimming film is generally delivered in rolls, wherein each roll is 50-100 meters in length, and the maximum length is 1000 meters; the width is 1.2 meters to 2.0 meters. When the dimming film client uses, the dimming film of the roll-shaped incoming material is cut into a certain size, an electrode is made, the film is attached to glass or laminated into two layers of glass, and the whole piece of transparent and opaque switching is realized by electrifying. However, this does not satisfy the customer's requirement for a piece of light adjusting film to be partially transparent or opaque and display patterns in practical use.
The nano silver wire (SNW) technology is that a nano silver wire ink material is coated on a PET base material or a glass substrate, and then a transparent conductive film with a nano silver wire conductive network pattern is carved and manufactured by utilizing a laser photoetching technology. Due to the special physical mechanism of the manufacture, the diameter of the line width of the nano silver line is very small, about 50nm and far less than 1um, so that the problem of Morie interference does not exist, and the nano silver line can be applied to display screens with various sizes. In addition, due to the small line width, the conductive film made by the silver line technology can achieve higher light transmittance than the film made by the metal grid technology, for example, the film product made by 3M company by adopting a micro-printing method can achieve 89% light transmittance. And thirdly, the nano silver wire film has smaller bending radius compared with a metal grid film, and the resistance change rate is smaller when the nano silver wire film is bent, so that the nano silver wire film has more advantages when being applied to equipment with curved surface display, such as an intelligent watch, a bracelet and the like.
At present, a great deal of research proves that the silver nanowires can be used for preparing transparent electrodes of touch screens, bent Organic Light Emitting Diodes (OLEDs), wearable electronic equipment, electronic skins, bent solar cells and the like, and the performance is still stable after the silver nanowires are bent for 1000 times. In addition, the nano silver wire has wide raw material sources, low price and excellent brittleness and toughness, and is suitable for large-scale industrial production. In conclusion, the nano silver wire is the only ITO substitute with practical application prospect and becomes the leading corner of the flexible screen.
In addition, according to media reports, the star product iWatch attracting attention of apple company adopts the nano silver wire thin film technology of TPK company, and proves that the nano silver wire product indeed has obvious technical advantages and industrial chain stability.
In the prior art, many patent documents are available about the preparation of nano silver wires, such as the patent with application number 201510507980.9 entitled "method for preparing nano silver wires"; the patent application No. 201510223402.2 entitled "a nano silver wire dispersion for preparing conductive film". However, the number of patents on the industrialization of the silver nanowire transparent conductive film is very small, and particularly, the method for the industrialization of the silver nanowire transparent conductive film can produce high-quality silver nanowire transparent conductive films with high yield. The patent with the application number of 201410229462.0 is named as a production method of a nano silver wire transparent conductive film. According to the technical scheme, the layer of the protective adhesive coating which can be hardened is arranged on the nano silver wire coating, and the produced nano silver wire transparent conductive film is very easy to scratch the surface of the transparent conductive film to cause appearance defects in the production process, the rolling process, the cutting process and the using process, and even breaks the nano silver wire in the layer to influence the use of a user; and the surface resistivity of the produced nano silver line transparent conductive film is more than 50ohm/sq, so that the application range of the transparent conductive film is narrowed.
Meanwhile, although the light modulation film manufactured by the method can realize partial transparency or non-transparency and pattern display control in one light modulation film, the manufacturing process is complex, the equipment investment is large, the cost is high, and the use and the product design of the product are restricted.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects and the improvement technology in the prior art, the utility model provides a PDLC (polymer dispersed liquid crystal) light adjusting film containing a nano silver wire transparent conductive film.
In order to realize the utility model, the utility model provides a following technical scheme:
the utility model discloses a technical scheme concretely relates to PDLC liquid crystal membrane of adjusting luminance that contains nanometer silver-colored line transparent conductive film. Take product horizontal level as an example, adopt from last mode description down, include: a PET1 layer, a first layer of nanosilver, a PDLC layer, a second layer of nanosilver, and a PET2 layer. In other words, the PET1 layer was the top layer, the first layer of nanosilver was adjacent to the PET1 layer; the PET2 layer is a bottom layer, and the second nano silver wire layer is adjacent to the PET2 layer; the middle layer is a PDLC layer, and the PDLC layer is respectively adjacent to the first nano silver wire layer and the second nano silver wire layer.
Meanwhile, etching lines are arranged on the first nano silver line layer and the second nano silver line layer. The PDLC liquid crystal dimming film is etched once by a laser etching machine, etching lines are respectively formed on the first nano silver line layer and the second nano silver line layer, the etching lines are formed simultaneously, and the PDLC liquid crystal dimming film is identical in shape, equal in length and in an up-down overlapping corresponding relation. The first nano silver line layer and the second nano silver line layer are etched by laser, and the first nano silver line layer and the second nano silver line layer are divided into mutually independent areas by simultaneously formed etching lines, wherein the areas are respectively called as a first nano silver line layer independent partition or a second nano silver line layer independent partition.
Wherein, the first nano silver wire layer independent subarea or the second nano silver wire layer independent subarea is characterized in that an etching line and the edge line of the first nano silver wire layer or the edge line of the second nano silver wire layer surround the first nano silver wire layer independent subarea or the second nano silver wire layer independent subarea to form an independent area; the first nano silver wire layer in the first nano silver wire layer independent subarea area or the second nano silver wire layer in the second nano silver wire layer independent subarea area are respectively connected into a whole body which can conduct electricity; and two adjacent first nano silver wire layer independent partitions or two adjacent second nano silver wire layer independent partitions are not conductive to each other or are insulated from each other because the etched wires are completely separated.
The first nano silver line layer or the second nano silver line layer is divided into mutually independent first nano silver line layer independent subareas or second nano silver line layer independent subareas by an etching line, wherein each first nano silver line layer independent subarea or second nano silver line layer independent subarea is respectively provided with an electrode, the electrodes are arranged at the edge close to the light modulation film, and the electrodes are connected with outgoing lines.
Wherein the etching line can be a straight line segment, a curved line segment, a broken line segment, a closed curve, a closed broken line or a combination thereof. The etching lines of the closed curve or the closed broken line are collectively called closed etching lines.
And the PDLC light adjusting film is etched once by a laser etching machine, and completely same etching lines are formed on the first nano silver line layer or the second nano silver line layer at the same time. That is, after one or two times of etching, the first nano silver wire layer independent subarea and the second nano silver wire layer independent subarea which have the same shape and the same size and are overlapped up and down correspondingly are formed on the first nano silver wire layer and the second nano silver wire layer simultaneously; meanwhile, the independent subareas of the first nano silver layer and the independent subareas of the second nano silver layer which have the same shape, the same size and the corresponding up-down overlapping are respectively provided with an electrode to form a pair of electrodes; and the first nano silver layer independent subarea and the second nano silver layer independent subarea which have the same shape and size and are overlapped up and down are controlled by controlling the voltage of the pair of electrodes, so that the purpose of controlling the optical characteristics of the PDLC liquid crystal dimming film is achieved.
Further, when the PDLC light-adjusting film is etched by a laser etching machine for one time and the formed etching line is a closed etching line, the closed etching line is in end-to-end connection, and the starting point and the end point coincide. The independent subareas of the first nano silver layer and the second nano silver layer formed by one-time etching have the same shape and size and are overlapped and corresponding up and down. In order to solve the problem, the first nano silver layer independent subarea and the second nano silver layer independent subarea formed by etching are not provided with electrodes, and patterns or characters of the patterns or characters are displayed by controlling the background area through a pair of electrodes arranged in the background area outside the patterns or characters.
Preferably, the electrode arranged on the first nano silver wire layer or the electrode arranged on the second nano silver wire layer is arranged on the same side of the PDLC light modulation film; the same side refers to the left side, the right side, the upper side or the lower side of the PDLC light adjusting film. The electrodes are arranged so as to facilitate the fabrication of the common electrode; that is, several adjacent electrodes are connected to make a common electrode.
In the technical scheme of the utility model, the preparation method of PDLC liquid crystal membrane of adjusting luminance that contains nanometer silver line transparent conductive film includes following step:
step one, preparing a base material: the selected base material is a PET (polyethylene terephthalate) sheet base, and the prepared PET sheet base is subjected to hardening treatment;
step two, coating the prepared coating liquid for coating the nano silver wire and the coating liquid for the protective adhesive: respectively coating the prepared nano silver wire coating liquid and the prepared protective adhesive coating liquid on a PET (polyethylene terephthalate) film base through coating equipment; drying the coated PET film base;
mounting two PET film bases coated with the nano silver wire coating liquid on a special coating machine for a PDLC (polymer dispersed liquid crystal) light adjusting film, and coating and curing by using a prepared PDLC composition to prepare the PDLC light adjusting film;
step four, carrying out laser etching on the PDLC light adjusting film prepared in the step three by using a laser etching machine, and etching lines on the PDLC light adjusting film, wherein the depth of the etching lines is based on cutting off the nano silver line layer;
and fifthly, preparing an electrode in each first nano silver layer independent partition or each second nano silver layer independent partition on the etched PDLC light modulation film.
In the preparation method of the PDLC light adjusting film of the nano silver wire transparent conductive film, in the first step, the hardening treatment is implemented by coating hardening liquid on one side or two sides of a PET sheet base by micro-concave coating and slit extrusion coating.
Wherein, the hardening liquid comprises the following components in percentage by weight: 2.5-7% of pure acrylic resin, 7.5-18% of ten-functional polyurethane polymer, 16-26% of difunctional polyurethane polymer, 5-10% of reactive diluent, 1-4% of photoinitiator and 45-55% of solvent.
The active diluent is a composition formed by one or more of lauric acid acrylate, tetrahydrofurfuryl acrylate, tripropylene glycol diacrylate, 1, 6-hexanediol diacrylate and 2-hydroxyethyl methacrylate phosphate.
The photoinitiator is a composition formed by one or more of methyl benzoylformate, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 1-hydroxy-cyclohexyl-phenyl ketone and 2-hydroxy-2-methyl-1-phenyl-1-acetone.
The solvent is one or more of butanone, ethylene glycol, acetone and methyl ether.
Further, in the preparation method of the PDLC liquid crystal dimming film of the nano silver wire transparent conductive film, in the first step, a hardening coating needs to be coated on the non-nano silver wire coating surface of the PET film base, so that the hardness is more than 1H, the light transmittance is increased by 0.5-3% relative to the non-hardened PET film base, the haze is reduced by 0.2-0.8% relative to the non-hardened PET film base, the light transmittance is 90-93%, the haze is less than or equal to 0.7%, the thickness of the PET film base is 25-200 μm, the PET film base is hot-pressed for 20-40 seconds at the temperature of 150-200 ℃ and the pressure of 5MPa, and the surface has no cracks.
Further, in the above method for preparing a PDLC liquid crystal dimming film of a silver nanowire transparent conductive film, in the second step, the method for preparing a silver nanowire coating liquid comprises: dissolving a nano silver wire with the diameter of 10-100 nm and the length of less than or equal to 200 mu m in sol with the solid content of 0.5-10 wt% and the average particle size of 10-100 nm, so that 1-10 g of silver is contained in every 1Kg of nano silver wire coating liquid; the solid content of the nano silver wire coating liquid is 0.5-11 wt%, the viscosity is 1-25 cps, and the coating weight of the nano silver wire coating is 10-50 mL/m2。
According to the preparation method of the PDLC (polymer dispersed liquid crystal) light-adjusting film of the nano silver wire transparent conductive film, in the second step, the protective glue coating liquid is metal oxide sol, the pH value of the metal oxide sol is 3-6, the solid content is 0.1-10 wt%, and the coating weight of the protective glue coating is 10-50 mL/m2。
According to the preparation method of the PDLC (polymer dispersed liquid crystal) light-adjusting film of the nano silver wire transparent conductive film, in the second step, the coating mode is slope flow extrusion coating, and the nano silver wire coating liquid and the protective glue coating liquid are coated on the PET (polyethylene terephthalate) film substrate at one time through a one-time double-layer extrusion coating technology.
According to the preparation method of the PDLC light adjusting film of the nano silver wire transparent conductive film, in the second step, the coating mode is micro gravure coating, roll coating, slit extrusion coating or knife coating, but only one layer can be coated at one time.
According to the preparation method of the PDLC light adjusting film containing the nano silver line transparent conductive film, in the second step, the drying temperature in the drying process is more than 20 ℃, and the drying time is more than 4 minutes.
According to the preparation method of the PDLC liquid crystal dimming film containing the nano silver wire transparent conductive film, in the second step, the prepared PET film base coated by the nano silver wire coating liquid and the protective glue coating liquid comprises the following steps: the light transmittance is 75-92%, the haze is less than or equal to 3%, the surface resistivity is 10-300 ohm/sq, the hardness is 3-5H, and the surface resistivity is not changed any more after a binding strip heating binding test at 150-200 ℃ for 20-30 seconds.
Further, setting the coating speed of the third step to be 10-50mm/s, and adjusting the UV curing power to be 0.5mW/cm 2-10 mW/cm 2; preferably, the coating speed is 25-45mm/s, and the UV curing power is 3mW/cm 2-8.5 mW/cm 2.
In the preparation method of the PDLC liquid crystal dimming film containing the nano silver line transparent conductive film, the electrodes are arranged in the area of each first nano silver line layer independent partition or each second nano silver line layer independent partition, are close to the edge of the PDLC liquid crystal dimming film, are close to the edge of the dimming film, are convenient for connecting the outgoing lines and wiring the outgoing lines, and are convenient for covering the electrodes and the outgoing lines by using the frame, so that the attractiveness and the safety of the product are improved.
Furthermore, the technical scheme of the utility model, also can directly use the PDLC liquid crystal membrane of the transparent conducting film of nanometer silver line that obtains from manufacture factory or market, through above-mentioned step four and step five, accomplish preparation method.
According to the requirement, in order to obtain the display effect of ideal patterns or characters, the etching line can be drawn into a CAD graph, and necessary rounding processing is carried out on the peak part of the graph, so that the adjacent etching line segments are in smooth transition. In addition, the arrangement position of the electrodes is planned at the same time. If the pattern or character formed by etching the line does not need to be electrified and controlled, the position of the electrode can be temporarily ignored.
The utility model discloses a laser etching equipment is direct to carry out laser etching to the PDLC liquid crystal membrane of the nanometer silver-colored line transparent conductive film that step one to three were prepared or directly obtained from the market, according to the pattern and/or the characters bandwagon effect of predesigned product, prepares out the PDLC liquid crystal membrane that has pattern and/or characters.
In the technical scheme of the utility model, through the setting and control of the laser etching machine, the first nano-silver layer and the second nano-silver layer can be opened at the same time through each time of laser etching operation, and completely same etching lines are formed on the first nano-silver layer and the second nano-silver layer simultaneously; therefore, after the etching line, such as a straight line segment, a curved line segment, a broken line segment, a closed curve and/or a closed broken line, is etched by the laser once, the portions of the first nano-silver line layer and the second nano-silver line layer, which need to be etched, are opened at the same time. In order to ensure that patterns and/or characters and the like prepared by laser etching can be connected with a driving power supply, electrodes are required to be arranged close to the edge of the dimming film in each independent first nano-silver layer independent partition or each independent second nano-silver layer independent partition on the first nano-silver layer or the second nano-silver layer; furthermore, each pair of the first nano silver wire layer independent subareas and the second nano silver wire layer independent subareas which are formed simultaneously by one-time laser etching, have the same shape and size, are overlapped up and down and correspond to each other, and electrodes arranged on the first nano silver wire layer independent subareas and the second nano silver wire layer independent subareas form a pair of electrodes; the voltage of the pair of electrodes is controlled by connecting a power supply control mechanism, and the optical characteristics of the independent subareas of the first nano silver layer and the second nano silver layer which have the same shape and the same size and are overlapped up and down correspondingly are controlled, so that the purposes of controlling the optical characteristics of the PDLC liquid crystal dimming film and controlling the display and hiding of patterns and characters on the PDLC liquid crystal dimming film are achieved.
In the utility model, the thickness of the PET1 layer or the PET2 layer of the PDLC light adjusting film is 20-300 μm; preferably the thickness of the PET1 layer or the PET2 layer is 40-275 μm; more preferably the layer of PET1 or PET2 has a thickness of 90-220 μm. The thickness of a first nano silver wire layer or a second nano silver wire layer of the PDLC light adjusting film is 50-150 nm; preferably, the thickness of the first layer of silver nanowires or the second layer of silver nanowires is 60 to 120 nm; most preferably, the first layer of silver nanowires or the second layer of silver nanowires has a thickness of 90-110 nm. The thickness of the PDLC layer of the PDLC light adjusting film is 5-200 μm; the thickness of the PDLC layer is preferably 8-120 μm; more preferably the thickness of the PDLC layer is 30-100 μm; most preferably, the thickness of the PDLC layer is 55-85 μm. The etching line width of the PDLC light adjusting film is 3-100 mu m; preferably, the width of the etching line is 5-80 μm; more preferably, the etched line width is 10-60 μm; most preferably, the etched line width is 40-50 μm.
Technical scheme in, between the pattern, between pattern and characters, between characters and characters, between pattern or characters and electrodes, be connected by narrow nanometer silver line layer, be called nanometer silver line layer joining region. For example, the first nano-silver wire layer or the second nano-silver wire layer is etched by a laser etcher for multiple times, and in some areas, for the purpose of electric conduction, a narrow nano-silver wire layer area is designed and formed between two etched lines, so that electric conduction is communicated between patterns, patterns and characters, characters and electrodes, and the narrow areas of the nano-silver wire layer are collectively called nano-silver wire layer connection areas. In the PDLC liquid crystal dimming film, the minimum width of the connecting area of the nano silver layer is more than or equal to 50 μm; preferably, the width of the etching line is 65-100 μm; more preferably, the etched line width is 80-90 μm. The width of the nano silver line connecting region varies according to the pattern area and the driving power voltage, and is generally designed to be as small as possible for the overall beauty.
In the technical scheme of the utility model, the laser etching machine is arranged on the marble substrate, and the PDLC liquid crystal dimming film is flatly fixed on the workbench distributed with vacuum pores by adopting a vacuum adsorption mode; the adopted solid/optical fiber laser can select one of 1064nm, 532nm or 355nm, and the line width is 20 microns +/-5 microns; the etching power is 5-30W adjustable; the laser head moves horizontally in XY direction relative to the etching object, the maximum horizontal moving speed is 600mm/S, and the maximum moving acceleration is 1G; the specific etching operation is set as follows: the laser spot is focused on the first nano-silver wire layer or the second nano-silver wire layer and is 50-220 μm away from the vertical distance of the equipment base point; the etching speed is 1000-4000mm/s, the frequency is 20-300KHZ, the pulse width is 5-50ns, and the spot etching time is 0.01-0.2 ms. The optimal maximum horizontal moving speed of the laser head is 550mm/S, and the maximum moving acceleration is 0.8G; the laser spot is focused on the first nano-silver wire layer or the second nano-silver wire layer, and is vertically away from the equipment base point by 80-200 mu m; the etching speed is 1500-. More preferably, the horizontal moving speed of the laser head is 500mm/S, and the maximum moving acceleration is 0.65G; the laser spot is focused on the first nano-silver wire layer or the second nano-silver wire layer, and is at a vertical distance of 100-; the etching speed is 1800-.
The etched product prepared by adopting the laser etching equipment has uniform line lines etched, and the linewidth difference in the same direction is less than or equal to 3 mu m; the lateral erosion of the lines is less than or equal to 3 mu m on a single side; no burr, no wave, no gap and no edge breakage; under the normal condition of the bonding force of the PDLC layer and the first nano-silver layer and the second nano-silver layer, even if a large corner or a peak curve is etched, the explosion point can not be generated, and the larger the bonding force is, the better the effect is.
In addition, the laser source may also be a picosecond pulse width laser with a frequency of 100kHz to 1000kHz, with ultrashort pulse widths sufficient to "cold" ablate material. Therefore, the femtosecond laser has better effect.
Preferably, for a piece of PDLC liquid crystal dimming film which is subjected to laser etching, the electrode arranged on the first nano silver wire layer is longitudinally arranged at the left edge of the dimming film, and the electrode arranged on the second nano silver wire layer is longitudinally arranged at the right edge of the dimming film; more preferably, a plurality of electrodes arranged on the same side and adjacent to each other are formed as a common electrode.
The utility model discloses among the technical scheme, with the independent subregion in every first nanometer silver line layer and the independent subregion in second nanometer silver line layer are connected the electrode, its manufacturing method, including following step:
s1: on a PDLC (polymer dispersed liquid crystal) dimming film which is etched by laser and contains a transparent conductive film of a nano-silver wire, the position of an electrode on an independent subarea of a first nano-silver wire layer is determined, then a PET2 layer with the width of 8mm and a second nano-silver wire layer are cut off at the position of the electrode, and the first nano-silver wire layer below is exposed;
s2: wiping off residues of the PDLC composition remained on the first nano silver wire layer by using a 99.99% ethanol solution, coating silver paste on the first nano silver wire layer by using a silk screen printing method, and drying the coated silver paste by using a hot air blower;
s3: pasting a copper foil with the width of 5mm on the surface of the dried silver paste;
s4, determining the electrode setting position on the independent partition of the second first nanometer silver wire layer, and repeating the steps; until the electrodes corresponding to all the independent partitions of the first nano silver wire layer are manufactured;
s5: welding a lead-out wire on the surface of the copper foil; or, for convenience of operation, the lead-out wires can be uniformly welded on the surfaces of all the copper foils after the electrodes of the following second nano silver wire layer are manufactured;
s6: determining the position of an electrode arranged in an independent partition manner on the second nano silver wire layer, and then cutting off a PET1 layer with the width of 8mm and the first nano silver wire layer at the position of the electrode to expose the second nano silver wire layer below;
s7: wiping off residues of the PDLC composition remained on the second nano silver wire layer by using a 99.99% ethanol solution, coating the silver paste on the second nano silver wire layer by using a silk screen printing method, and drying the coated silver paste by using a hot air blower;
s8: pasting a copper foil with the width of 5mm on the surface of the dried silver paste;
s9, determining the electrode setting position on the second independent subarea of the second nano silver layer, repeating the operation until the electrodes corresponding to all the second independent subareas of the second nano silver layer are manufactured;
s10: and welding the lead wire on the surface of the copper foil manufactured above.
Preferably, a laser etched PDLC (polymer dispersed liquid crystal) dimming film, all electrodes arranged on the first nano silver wire layer are arranged on the left side of the dimming film and close to the edge of the film, and part of adjacent electrodes or all electrodes are connected to form a common electrode; and the electrode arranged on the second nano silver wire layer film is arranged on the right side of the light adjusting film.
The technical proposal of the utility model also comprises the PDLC liquid crystal dimming film containing the nano silver wire transparent conductive film prepared by the method. The PDLC light adjusting film containing the nano silver line transparent conductive film comprises a PET1 layer, a first nano silver line layer, a PDLC layer, a second nano silver line layer and a PET2 layer.
And the PDLC (polymer dispersed liquid crystal) dimming film is etched by a laser etching machine for one time, and completely same etching lines are simultaneously formed on the first nano silver line layer or the second nano silver line layer. The first nano silver wire layer or the second nano silver wire layer is etched by laser and divided into mutually independent areas which are called as a first nano silver wire layer independent subarea and a second nano silver wire layer independent subarea.
Furthermore, in the first nano silver wire layer or the second nano silver wire layer, the independent subarea of the first nano silver wire layer or the independent subarea of the second nano silver wire layer is surrounded by an etching line positioned on the first nano silver wire layer and the edge of the first nano silver wire layer or an etching line positioned on the second nano silver wire layer and the edge of the second nano silver wire layer to form an independent area; in the independent subarea area of the first nano silver wire layer or the independent subarea area of the second nano silver wire layer, the first nano silver wire layer or the second nano silver wire layer is connected into a conductive whole; and two adjacent first nano silver wire layer independent partitions or two adjacent second nano silver wire layer independent partitions are not conductive to each other or are insulated from each other because the etched wires are completely separated. The first nano silver wire layer or the second nano silver wire layer is divided into mutually independent first nano silver wire layer independent subareas or second nano silver wire layer independent subareas by an etching line positioned on the first nano silver wire layer or the second nano silver wire layer, an electrode is respectively arranged on the first nano silver wire layer or the second nano silver wire layer independent subareas, the electrode is arranged at the edge close to the light adjusting film, and the electrode is connected with a leading-out wire.
Forming completely same etching lines on the first nano silver line layer and the second nano silver line layer through one-time etching; that is, after one or two times of etching, the first and second independent partitions with the same shape and size are formed on the first and second nano-silver layers at the same time.
Preferably, the electrode arranged on the first nano silver wire layer or the electrode arranged on the second nano silver wire layer is arranged on the same side of the PDLC liquid crystal dimming film; the same side refers to the left side, the right side, the upper side or the lower side of the PDLC light adjusting film.
More preferably, several electrodes arranged on the same side are connected to form a common electrode.
Compared with the prior art, the utility model have following advantage:
1. the technical proposal of the utility model overcomes the defects of long process, difficult operation and low yield in the prior art; particularly, the laser etching machine is used for etching once, so that the first nano silver wire layer and the second nano silver wire layer are etched simultaneously, the operability of the technical scheme is improved, and an electrode control system is simplified.
2. In the technical scheme of the invention, the ITO conductive film in the prior art is replaced by the nano silver wire transparent conductive film, so that the cost can be greatly reduced; meanwhile, the transmittance can be improved to more than 90%, and the surface resistance can be very low; compared with the laser etching method by using the ITO transparent conductive film as the light modulation film, the method has better etching effect and almost has no explosion point.
3. By the utility model discloses a product that technical scheme prepared has realized the optical control of each nanometer silver line layer independent subregion by etching line formation, and is small in quantity at needs electrode, under the simple condition of electrode control system, has improved the display ability of product pattern and characters.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a PDLC liquid crystal light modulation film according to the present invention;
fig. 2 is a schematic cross-sectional view of a PDLC liquid crystal light modulation film structure according to the present invention;
fig. 3 is a schematic diagram of another embodiment of the PDLC liquid crystal light modulation film according to the present invention;
fig. 4 is a schematic diagram of another embodiment of the PDLC liquid crystal light modulation film according to the present invention;
fig. 5 is a schematic view of another embodiment of the PDLC liquid crystal light modulation film according to the present invention;
fig. 6 is a schematic view of another embodiment of the PDLC liquid crystal light modulation film according to the present invention;
fig. 7 is a schematic view of another embodiment of the PDLC liquid crystal light modulation film according to the present invention;
fig. 8 is a schematic diagram of another embodiment of the PDLC liquid crystal light modulation film according to the present invention.
The reference numbers in the above figures are as follows:
1, etching a line A; 2, etching a line B; 3, an electrode A;
4, an electrode B; 5, closing an etching line; 6 PET1 layer;
7 a first layer of nanosilver; 8 PDLC layer; 9 a second layer of nanosilver;
the 10 PET2 layer 11 nanowire layer connected the 12 common electrode.
In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings and the implementation examples of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments that can be made by a person skilled in the art without creative efforts based on the described embodiments of the present invention belong to the protection scope of the present invention.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings by way of specific examples, which are intended to describe the technical solution in detail, but not to limit the technical solution.
Fig. 2 is a PDLC membrane cross section schematic diagram that adjusts luminance that contains nanometer silver line transparent conductive film, as shown in fig. 2, PDLC membrane that adjusts luminance that contains nanometer silver line transparent conductive film includes from last to down in proper order: PET1 layer 6, first layer of nanosilver 7, PDLC layer 8, second layer of nanosilver 9 and PET2 layer 10. Fig. 2 also shows electrode a3 disposed on first layer of nanosilver 7 and electrode B4 disposed on second layer of nanosilver 9.
Fig. 1 shows a specific embodiment of the technical solution of the present disclosure.
Example 1
As shown in fig. 1, in this example 1, three rows of patterns are etched on the PDLC liquid crystal dimming film containing the silver nanowire transparent conductive film, and each row of patterns is composed of two common leaf patterns and two maple leaf patterns, which are alternately arranged.
Taking the uppermost row of patterns as an example, the patterns are composed of an etching line A1 and an etching line B2, and an electrode A3 and an electrode B4 are respectively arranged on the left side and the right side of the PDLC light modulation film; meanwhile, in this embodiment 1, the electrodes a3 on the left side of the PDLC liquid crystal dimming film are provided in common on the first nano-silver layer 7, and the electrodes B4 on the right side of the PDLC liquid crystal dimming film are provided in common on the second nano-silver layer 9.
In the present embodiment, the thickness of the PDLC liquid crystal light modulation film containing the nano silver wire transparent conductive film, the PET1 layer 6 or the PET2 layer 10 is 150 μm; the thickness of the first layer 7 or the second layer 9 of silver nanowires is 60 nm; the thickness of the PDLC layer 8 is 30 μm; the width of the nano silver wire layer connecting area 11 is 80 μm; the etched line width was 30 μm. The patterned PDLC light-adjusting film is prepared by the following steps:
in the technical scheme of the utility model, the preparation method of PDLC liquid crystal membrane of adjusting luminance that contains nanometer silver line transparent conductive film includes following step:
step one, preparing a base material: the selected base material is a PET (polyethylene terephthalate) sheet base, and the prepared PET sheet base is subjected to hardening treatment;
step two, coating the prepared coating liquid for coating the nano silver wire and the coating liquid for the protective adhesive: respectively coating the prepared nano silver wire coating liquid and the prepared protective adhesive coating liquid on a PET (polyethylene terephthalate) film base through coating equipment; drying the coated PET film base;
mounting two PET film bases coated with the nano silver wire coating liquid on a special coating machine for a PDLC (polymer dispersed liquid crystal) light adjusting film, and coating and curing by using a prepared PDLC composition to prepare the PDLC light adjusting film; the coating speed was set at 30mm/s, and the UV curing power was adjusted to 2.5mW/cm 2.
Step four, carrying out laser etching on the PDLC light adjusting film prepared in the step three by using a laser etching machine, and etching lines on the PDLC light adjusting film, wherein the depth of the etching lines is based on cutting off the nano silver line layer; laser etching etches line a1 and line B2 in that order. Repeating the operation to finish the three-row pattern etching.
Wherein, the PDLC light adjusting film is flatly fixed on a workbench distributed with vacuum pores in a vacuum adsorption mode; the adopted solid/optical fiber laser is 532nm type, and the laser head horizontally moves in XY directions relative to an etching object; the specific etching operation is set as follows: the laser spot is focused on the first nano-silver wire layer or the second nano-silver wire layer and is 110 microns away from the equipment base point; the etching speed is 2200mm/s, the frequency is 180KHz, the pulse width is 38ns, and the spot etching time is 0.02 ms.
Step five: near the film edge of the PDLC liquid crystal light adjusting film after etching, three electrodes a3 on the left side and three electrodes B4 on the right side were prepared in this order.
In this example 1, in the first step, the hardening treatment was performed by applying the hardening liquid to one surface of the PET sheet base by the dimple coating. The hardening liquid comprises the following components in percentage by weight: 5.5 percent of pure acrylic resin, 12 percent of decafunctional polyurethane resin, 23 percent of difunctional polyurethane resin, 8 percent of reactive diluent, 3.5 percent of photoinitiator and 48 percent of solvent glycol.
The active diluent is lauric acid acrylate.
The photoinitiator is methyl benzoylformate.
Hot pressing at 180 deg.C and 5MPa for 30 s without surface crack.
In addition, in the second step, the method for preparing the nano silver wire coating liquid comprises the following steps: dissolving 30nm diameter and 150 μm length of silver nanowire in 8 wt% solid content sol with average particle size of 20nm to obtain 6g silver per 1Kg of silver nanowire coating liquid; the solid content of the nano silver wire coating liquid is 8 wt%, the viscosity is 22cps, and the coating weight of the nano silver wire coating is 30mL/m 2.
In the second step, the protective adhesive coating liquid is metal oxide sol, the pH of the metal oxide sol is 5.5, the solid content is 8 wt%, and the coating weight of the protective adhesive coating is 42mL/m 2. The coating mode of the coating is slide extrusion coating, and the nano silver wire coating liquid and the protective adhesive coating liquid are coated on the PET film base at one time through one-time double-layer extrusion coating.
The drying temperature in the drying process is above 43 ℃, and the drying time is 6 minutes. In addition, the coating speed of the second step is set to be 40mm/s, and the UV curing power is adjusted to be 8mW/cm 2;
in step two of this example 1, the prepared PET film substrate coated with the coating liquid of the nano silver wire and the coating liquid of the protective paste: the light transmittance is 90%, the haze is 2%, the surface resistivity is 80ohm/sq, the hardness is 5H, and the surface resistivity is not changed any more after a binding strip heating binding test at 180 ℃ for 25 seconds.
In example 1, the preparation of the electrode a3 and the electrode B4 includes:
s11: cutting off a PET2 layer 10 thin film with the width of 8mm and a second nano silver layer 9 at the position of an electrode A3 on the PDLC light modulation film subjected to laser etching in the fourth step, and exposing a first nano silver layer 7 below; as shown on the left side of fig. 2;
s12: wiping off residues of the PDLC composition remaining on the first silver nanowire layer 7 using a 99.99% ethanol solution, coating silver paste on the first silver nanowire layer 7 using a screen printing method, and then drying the coated silver paste using a hot air blower;
s13: pasting a copper foil with the width of 5mm on the surface of the dried silver paste;
s14, determining the electrode arrangement position on the second first nano silver layer independent subarea, repeating the steps, and finishing the manufacture of the electrodes corresponding to all the first nano silver layer independent subareas on the left side of the PDLC light modulation film;
s15: welding a leading-out wire on the surface of the manufactured copper foil to finish the electrode manufacturing of the first nano silver wire layer;
s16: determining the position of an independently partitioned disposed electrode B4 on the second silver nanowire layer 9, and then cutting off a PET1 layer 6 having a width of 8mm and the first silver nanowire layer 7 at the position of an electrode B4 to expose the underlying second silver nanowire layer 9; as shown on the right side of fig. 2;
s17: wiping off residues of the PDLC composition remaining on the second silver nanowire layer 9 using a 99.99% ethanol solution, coating silver paste on the second silver nanowire layer 9 using a screen printing method, and then drying the coated silver paste using a hot air blower;
s18: pasting a copper foil with the width of 5mm on the surface of the dried silver paste;
s19, determining the position of the electrode B4 on the second independent subarea of the second nano silver layer, and repeating the operation until the electrodes corresponding to all the second independent subareas of the second nano silver layer are manufactured;
s20: and welding the lead wire on the surface of the copper foil manufactured above.
As can be seen from fig. 1, each row of patterns is formed by two etching lines, and after two times of etching, the first nano silver line layer 7 and the second nano silver line layer 9 are formed with the same shape and the same size, and are overlapped up and down to correspond to the first nano silver line layer independent partition and the second nano silver line layer independent partition, so as to form a common leaf pattern and a maple leaf pattern. Then, each first nano silver wire layer independent partition or each second nano silver wire layer independent partition is respectively provided with an electrode which is respectively positioned at the left side and the right side of the product. The row of patterns is transparent and opaque, and is controlled by the two electrodes.
The second and third row patterns, their design principles and electrical manipulation modes, are exactly the same as the first row. In practical use of the product, three electrodes A3 on the left side of the first nano silver wire layer 7 and three electrodes B4 on the right side of the second nano silver wire layer 9 are controlled, so that the three rows of patterns respectively generate light transmission and light non-transmission effects, and the purpose of displaying the patterns is achieved.
Specifically, through different control schemes of the electrodes, various visual effects such as simultaneous transparency of three rows of patterns, sequential transparency of three rows of patterns, linkage of a first row of patterns and a third row of patterns and the like can be realized; according to the visual effect design scheme, the method is realized by controlling each electrode.
Example 2
Fig. 3 shows another embodiment 2 of the technical solution disclosed in the present invention; wherein the three electrodes on the left side are prepared as one common electrode 12. In this example 2, the same materials, procedures and parameters as those of example 1 were used except for the conditions and data described below.
In this example 2, in the first step, the PET sheet base was coated on both sides with the curing liquid by slit extrusion coating, and the curing treatment was performed. The hardening liquid comprises the following components in percentage by weight: 7% of pure acrylic resin, 18% of ten-functional polyurethane polymer, 26% of difunctional polyurethane polymer, 10% of reactive diluent, 4% of photoinitiator and 35% of solvent acetone.
The reactive diluent is tripropylene glycol diacrylate.
The photoinitiator is phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide.
Hot pressing at 200 deg.C and 5MPa for 20 s without surface crack.
In addition, in the second step, the method for preparing the nano silver wire coating liquid comprises the following steps: dissolving a nano silver wire with the diameter of 100nm and the length of 200 mu m in sol with the solid content of 1 wt% and the average particle size of 100nm to ensure that each 1Kg of nano silver wire coating liquid contains 10g of silver; the solid content of the nano silver wire coating liquid is 11 wt%, the viscosity is 25cps, and the coating weight of the nano silver wire coating is 50mL/m 2.
In the second step, the protective adhesive coating liquid is metal oxide sol, the pH of the metal oxide sol is 3, the solid content is 10 wt%, and the coating weight of the protective adhesive coating is 50mL/m 2. The coating mode of the coating is slide extrusion coating, and the nano silver wire coating liquid and the protective adhesive coating liquid are coated on the PET film base at one time through one-time double-layer extrusion coating.
The procedure of example 1 was repeated, wherein the step of S11: at the positions of the three electrodes a3 on the PDLC liquid crystal dimming film subjected to laser etching, the PET2 layer 10 thin film having a width of 8mm and the second silver nanowire layer 9 were cut off to expose the underlying first silver nanowire layer 7.
In example 2, a common electrode 12 was formed on the first silver nanowire layer 7 on the left side of the laser-etched PDLC liquid crystal dimming film to unify the electric control operation of the first silver nanowire layer 7. That is, by controlling the voltages of the three electrodes on the right second silver-nanowire layer 9 and the left common electrode 12, respectively, the optical characteristics of the three-line pattern can be controlled, respectively.
Example 3
Fig. 4 shows example 3 in the technical solution of the present invention, in this example, the thickness of the PDLC liquid crystal light modulation film, the PET1 layer 6 or the PET2 layer 10 is 300 μm; the thickness of the first layer 7 or the second layer 9 of silver nanowires is 80 nm; the thickness of the PDLC layer 8 is 120 μm; the width of the nano silver wire layer connecting area 11 is 80 μm; the etched line width was 60 μm.
As shown in fig. 4, three rows of patterns are etched on the PDLC liquid crystal dimming film, each row is composed of three letter patterns, which are respectively three letter patterns of english letters B, M and W. The difference from embodiment 1 is that each letter is composed of two separate etching lines, etching line a1 and etching line B2 are etched by two times of etching, a pair of letter patterns which are composed of a first silver nanowire layer independent partition and a second silver nanowire layer independent partition, have the same shape and size, and overlap with each other, and for the pair of letter patterns, an electrode A3 is arranged on the first silver nanowire layer 7 on the left side and an electrode B4 is arranged on the second silver nanowire layer 9 on the right side, respectively, and the letter patterns are controlled by the two electrodes.
The procedure of example 1 was repeated except that the coating speed in the second step was set to 50mm/s and the UV curing power was adjusted to 10mW/cm2(ii) a In the third step, nine letters in the scheme are etched in sequence from left to right and from top to bottom; solid state/fiber laserIn the model of 1064nm, a laser spot is focused on the first nano silver wire layer or the second nano silver wire layer and is at a vertical distance of 220 microns from a base point of the equipment; the etching speed is 4000mm/s, the frequency is 300KHZ, the pulse width is 45ns, and the spot etching time is 0.2 ms; in example 3, in the first step, the PET sheet base was coated on both sides with the curing liquid by the gravure coating, and the curing treatment was performed. The hardening liquid comprises the following main components in percentage by weight: 2.5 percent of pure acrylic resin, 10 percent of decafunctional group polyurethane resin, 16 percent of difunctional group polyurethane resin, 5 percent of reactive diluent, 1 percent of photoinitiator and 65.5 percent of butanone serving as solvent.
The active diluent is 1, 6-hexanediol diacrylate.
The photoinitiator is 1-hydroxy-cyclohexyl-phenyl ketone.
Hot pressing at 160 deg.C and 5MPa for 20 s without surface crack.
In addition, in the second step, the method for preparing the nano silver wire coating liquid comprises the following steps: dissolving a nano silver wire with the diameter of 10nm and the length of 100 mu m in sol with the solid content of 0.5 wt% and the average particle size of 10nm to ensure that 1g of silver is contained in each 1Kg of nano silver wire coating liquid; the solid content of the nano silver wire coating liquid is 0.5 wt%, the viscosity is 2.5cps, and the coating weight of the nano silver wire coating is 10mL/m 2.
In the second step, the protective adhesive coating liquid is metal oxide sol, the pH of the metal oxide sol is 6, the solid content is 0.1 wt%, and the coating weight of the protective adhesive coating is 10mL/m 2. The coating mode of the coating is slide extrusion coating, and the nano silver wire coating liquid and the protective adhesive coating liquid are coated on the PET film base at one time through one-time double-layer extrusion coating.
According to the characteristics described above and shown in fig. 4, it can be seen that the nine letter patterns of the product are respectively controlled by a pair of electrodes, so that the overall pattern can be designed in various changes by utilizing the two states of transparency and opacity of each pattern, and the generation and duration of each changed pattern can be realized by controlling the nine pairs of electrodes.
In example 3, a method for preparing a letter pattern is given, and similarly, other letter patterns can be realized by the same principle and in a similar manner.
Example 4
Fig. 5 shows another embodiment 4 of the disclosed solution; in this embodiment 4, three electrodes positioned on the left side of the middle row letter pattern are prepared as one common electrode 12. In this example 4, the same materials and technical parameters as those of example 3 were used except for the following descriptions.
In this example 4, in the first step, the hardening treatment was performed by applying the hardening liquid to both sides of the PET film base by the dimple coating. The hardening liquid comprises the following main components in percentage by weight: 5% of pure acrylic resin, 15% of decafunctional polyurethane resin, 22% of difunctional polyurethane resin, 10% of reactive diluent, 3.6% of photoinitiator and 44.4% of acetone and methyl ether mixed solution with the solvent volume ratio of 1: 1.
The active diluent is tetrahydrofurfuryl acrylate.
The photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-acetone.
In addition, in the second step, the method for preparing the nano silver wire coating liquid comprises the following steps: dissolving a nano silver wire with the diameter of 60nm and the length of 80 mu m in sol with the solid content of 2.5 wt% and the average particle size of 20nm to ensure that each 1Kg of nano silver wire coating liquid contains 3.5g of silver; the solid content of the nano silver wire coating liquid is 0.5 wt%, the viscosity is 6.5cps, and the coating weight of the nano silver wire coating is 30mL/m 2.
The procedure of example 3 was repeated to complete the fabrication of the scheme shown in FIG. 5.
Example 5
In this embodiment, the thickness of the PDLC liquid crystal light adjusting film, PET1 layer 6 or PET2 layer 10 is 20 μm; the thickness of the first layer 7 or the second layer 9 of silver nanowires is 50 nm; the thickness of the PDLC layer 8 is 5 μm; the width of the nano silver wire layer connecting area 11 is 50 μm; the etched line width was 3 μm.
Accordingly, the coating speed was set to 10mm/s, and the UV curing power was adjusted to 1.0mW/cm2. LaserThe horizontal moving speed of the optical head is 500mm/S, and the maximum moving acceleration is 0.65G; the laser spot is focused on the first nano-silver wire layer or the second nano-silver wire layer and is 150 microns away from the equipment base point in a vertical manner; the etching speed is 3500mm/s, the frequency is 100KHZ, the pulse width is 10ns, and the spot etching time is 0.05 ms.
The procedure of example 1 was repeated to complete the fabrication of the scheme shown in FIG. 6.
The difference is that, as shown in fig. 6, each pattern is formed by a closed curve or a closed broken line, that is, after one-time etching by using a laser etching machine, a first nano silver line layer independent partition and a second nano silver line layer independent partition are respectively formed by a closed etching line 5 on a first nano silver line layer and a second nano silver line layer; in addition, in example 5, in the background region on the left side of the PDLC liquid crystal dimming film, one electrode is respectively formed on the first nano silver layer and the second nano silver layer, and the electrodes are respectively named as electrode a3 and electrode B4; by controlling the pair of electrodes, electrode A3 and electrode B4, the optical state of the background area is manipulated to achieve the effect of showing or hiding the pattern formed by the closed etching lines 5.
Example 6
In this embodiment, the thickness of the PDLC liquid crystal light adjusting film, PET1 layer 6 or PET2 layer 10 is 300 μm; the thickness of the first layer 7 or the second layer 9 of silver nanowires is 150 nm; the thickness of the PDLC layer 8 is 200 μm; the width of the nano silver wire layer connecting area 11 is 100 mu m; the etched line width was 100 μm.
Accordingly, the 355nm type can be selected as the solid/fiber laser, the coating speed is set to 35mm/s, and the UV curing power is adjusted to 8.6mW/cm2. The maximum horizontal moving speed of the laser head is 500mm/S, and the maximum moving acceleration is 0.8G; the laser spot is focused on the first nano-silver wire layer or the second nano-silver wire layer and is 120 microns away from the equipment base point in the vertical direction; the etching speed is 1800mm/s, the frequency is 120KHZ, the pulse width is 5ns, and the spot etching time is 0.15 ms.
In this example 6, the main components of the hardening liquid are, in weight percent: 5% of pure acrylic resin, 16.5% of ten-functional polyurethane resin, 24% of difunctional polyurethane resin, 7.5% of reactive diluent, 3.6% of photoinitiator and 43.4% of mixed solution of acetone and ethylene glycol with the solvent volume ratio of 1: 1.
The active diluent is 1, 6-hexanediol diacrylate.
The photoinitiator is 1-hydroxy-cyclohexyl-phenyl ketone.
As shown in fig. 7, this scheme designs nine letter patterns each composed of one closed etched line 5, respectively. The procedure described in example 5 was repeated to complete the preparation of the solution shown in FIG. 7; the difference is that the positions of the electrode A3 and the electrode B4 are respectively arranged at the middle positions of the left side and the right side of the PDLC light adjusting film. Like embodiment 5, the product of this embodiment 6 also realizes the displaying or hiding effect of the letter pattern by manipulating the optical state of the background area.
Example 7
FIG. 8 shows a product design containing a landscape design, in this example, the PDLC film, PET1 layer 6 or PET2 layer 10 is 188 μm thick; the thickness of the first layer 7 or the second layer 9 of silver nanowires is 80 nm; the thickness of the PDLC layer 8 is 40 μm; the width of the etched line is 15 μm
The preparation operation is as follows:
the procedure of example 1 was repeated except that the procedure one to three were omitted, and in this example 6, the finished PDLC liquid crystal dimming film was used as it is.
An electrode a3 disposed on the first layer of silver nanowires, disposed on the left or bottom; the electrode B4, which was separately fabricated and disposed on the second layer of silver nanowires, was disposed on the right side or bottom. Wherein, the third step: the adopted solid/optical fiber laser is 532nm type, laser spots are focused on the first nano silver wire layer 7 or the second nano silver wire layer 9, and the vertical distance from the equipment base point is 50 micrometers; the etching speed is 1000mm/s, the frequency is 50KHZ, the pulse width is 5ns, and the spot etching time is 0.01 ms.
As shown in fig. 8, the upper half shows two shell patterns including a rainbow represented by a circular arc etching line, two shell patterns composed of a curved etching line and a broken line etching line, and a sea wave line represented by a curved etching line; the lower half is a LOGO pattern formed by a broken line etching line and a circular arc line etching line. As shown in fig. 8, the first and second independent partitions of the nano-silver layer on the upper and lower sides are respectively defined by the edge of the nano-silver layer of the PDLC liquid crystal dimming film and an etching line; and the plurality of first nano silver line layer independent subareas and the plurality of second nano silver line layer independent subareas are positioned in the middle and are respectively limited by two etching lines and the edges of the nano silver line layers of the PDLC light adjusting film. For each first nano silver wire layer independent partition or second nano silver wire layer independent partition, an electrode is respectively arranged on the first nano silver wire layer 7 or the second nano silver wire layer 9 to form a pair of electrodes.
In fig. 8, as an example, etching lines constituting two shell patterns are denoted as etching lines a 1; represents the etched line of the sea wave line, labeled etched line B2; a first layer 7 and a second layer 9 of nanosilver between etched line a1 and etched line B2, provided with electrode A3 on the left and electrode B4 on the right, respectively; by controlling the voltage between electrode A3 and electrode B4, the optical properties of the region between the shell pattern etch line a1 and the sea wave line etch line B2 were manipulated.
By controlling each pair of electrodes, the optical control of the pattern is realized, and the effect of showing the design of the overall pattern is achieved. It is also possible to exhibit an optical display effect of a specific region different from that of other portions by controlling the region.
It should be noted that, in the description of the present invention, the orientation or positional relationship indicated by the terms "center", "above", "below", "front", "rear", "upper left, lower left", "upper right", "lower right", "left side", "right side", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is the orientation or positional relationship shown based on the drawings, which is only for convenience of description of the present invention, and is not used to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features to be referred to. Thus, a feature defined by "first," "second," etc. may be explicitly or implicitly indicated as including one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description herein, the particular features, structures, materials, or characteristics disclosed may be combined in any suitable manner in any one or more embodiments or examples.
A specific embodiment of the present invention is further described above with reference to the accompanying drawings, and the specific embodiment is intended to describe the technical solution in detail, but not to limit the technical solution. The above-mentioned specific embodiments are only described for the preferred embodiments of the present invention, and are not intended to limit the technical concept and the protection scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical scheme should fall into the protection scope of the present invention without departing from the design concept of the present invention.
Claims (10)
1. A PDLC (polymer dispersed liquid crystal) light adjusting film containing a nano silver line transparent conductive film is characterized by sequentially comprising a PET1 layer (6), a first nano silver line layer (7), a PDLC layer (8), a second nano silver line layer (9) and a PET2 layer (10); etching lines are arranged on the first nano silver line layer (7) and the second nano silver line layer (9), and the first nano silver line layer (7) or the second nano silver line layer (9) is subjected to laser etching and is divided into mutually independent first nano silver line layer independent partitions or second nano silver line layer independent partitions;
the first nano silver wire layer (7) in the first nano silver wire layer independent partition area or the second nano silver wire layer (9) in the second nano silver wire layer independent partition area are connected into a whole; two adjacent first nano silver wire layers are independently partitioned or two adjacent second nano silver wire layers are independently partitioned, and the two adjacent first nano silver wire layers are completely isolated by the etched wires and are mutually insulated; and (3) forming two identical etching lines on the first nano silver line layer (7) and the second nano silver line layer (9) at the same time by one-time etching of a laser etching machine.
2. The PDLC (polymer dispersed liquid crystal) dimming film containing the nano-silver wire transparent conductive film as claimed in claim 1, which is characterized in that a first nano-silver wire layer independent partition and a second nano-silver wire layer independent partition which are identical in shape and size and are overlapped up and down are formed on a first nano-silver wire layer (7) and a second nano-silver wire layer (9) simultaneously through one-time or two-time etching of a laser etching machine; each first nano silver wire layer independent partition or each second nano silver wire layer independent partition which are independent mutually is respectively provided with an electrode, the electrodes are arranged at the edge close to the light modulation film, and the electrodes are connected with outgoing lines.
3. The PDLC (Polymer dispersed liquid Crystal) light adjusting film containing the transparent conductive film of nano-silver wire as claimed in claim 1, wherein the electrode A (3) disposed on the first nano-silver wire layer (7) or the electrode B (4) disposed on the second nano-silver wire layer (9) is disposed on the same side of the PDLC light adjusting film; the same side refers to the left side, the right side, the upper side or the lower side of the PDLC light adjusting film.
4. The PDLC liquid crystal light-adjusting film containing the nano-silver wire transparent conductive film according to any one of claims 1 to 3, characterized in that the thickness of the PET1 layer (6) or the PET2 layer (10) is 20-300 μm; the thickness of the first nano silver wire layer (7) or the second nano silver wire layer (9) is 50-150 nm; the thickness of the PDLC layer (8) is 5-200 mu m; the width of the etching line is 3-100 μm; the minimum width of the connecting area (11) of the nano silver wire layer is more than or equal to 50 mu m.
5. The PDLC liquid crystal light-adjusting film containing the nano silver wire transparent conductive film according to claim 4, characterized in that the thickness of the PET1 layer (6) or the PET2 layer (10) is 40-275 μm; the thickness of the first nano silver wire layer (7) or the second nano silver wire layer (9) is 60-120 nm; the thickness of the PDLC layer (8) is 8-120 mu m; the width of the etching line is 5-80 μm; the width of the connecting region of the nano silver wire layer is 65-100 mu m.
6. The PDLC liquid crystal light-adjusting film containing the nano silver wire transparent conductive film according to claim 4, characterized in that the thickness of the PET1 layer (6) or the PET2 layer (10) is 90-220 μm; the thickness of the first nano silver wire layer (7) or the second nano silver wire layer (9) is 90-110 nm; the thickness of the PDLC layer (8) is 55-85 μm; the width of the etching line is 40-50 μm; the width of the connecting region of the nano silver wire layer is 80-90 μm.
7. The PDLC light-adjusting film comprising a transparent conductive film of nano-silver wires as claimed in any one of claims 1 to 3, wherein several electrodes disposed on the same side are connected to make a common electrode (12).
8. The PDLC light adjusting film containing the nano-silver line transparent conductive film according to claim 1 or 2, wherein the etching line is a straight line segment, a curved line segment, a broken line segment, a closed curve, a closed broken line or a combination thereof.
9. The PDLC light-adjusting film containing the nano-silver wire transparent conductive film according to any one of claims 1 to 3, characterized in that for a piece of PDLC light-adjusting film which has been subjected to laser etching, the electrode A (3) arranged on the first nano-silver wire layer (7) is longitudinally arranged at the left edge of the light-adjusting film, and the electrode B (4) arranged on the second nano-silver wire layer (9) is longitudinally arranged at the right edge of the light-adjusting film.
10. The PDLC liquid crystal light adjusting film containing the nano-silver line transparent conductive film according to any one of claims 1 to 3, characterized in that the etching line is a closed curve or a closed folding line, which is collectively called a closed etching line (5).
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| JP7494877B2 (en) | 2020-11-17 | 2024-06-04 | Ｔｏｐｐａｎホールディングス株式会社 | Light-adjusting sheet and method for manufacturing the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7494877B2 (en) | 2020-11-17 | 2024-06-04 | Ｔｏｐｐａｎホールディングス株式会社 | Light-adjusting sheet and method for manufacturing the same |
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Address after: 519000 room 111, 1st floor, No.6 workshop, No.9 Jinzhu Road, Tangjiawan Town, Zhuhai City, Guangdong Province Patentee after: Zhuhai Shuifa Xingye New Materials Technology Co.,Ltd. Country or region after: China Address before: Room 111, 1st Floor, No. 6 Factory Building, No. 9, Jinzhu Road, Tangjiawan Town, Xiangzhou District, Zhuhai City, Guangdong Province, 519000 Patentee before: ZHUHAI SINGYES NEW MATERIALS TECHNOLOGY Co.,Ltd. Country or region before: China |