CN114714737B - Stepless color-changing glass preparation process and stepless color-changing glass - Google Patents
Stepless color-changing glass preparation process and stepless color-changing glass Download PDFInfo
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- CN114714737B CN114714737B CN202210364308.9A CN202210364308A CN114714737B CN 114714737 B CN114714737 B CN 114714737B CN 202210364308 A CN202210364308 A CN 202210364308A CN 114714737 B CN114714737 B CN 114714737B
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- 239000011521 glass Substances 0.000 title claims abstract description 105
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 125
- 239000002313 adhesive film Substances 0.000 claims abstract description 80
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 72
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 72
- 230000003287 optical effect Effects 0.000 claims abstract description 64
- 238000007731 hot pressing Methods 0.000 claims abstract description 57
- 230000001681 protective effect Effects 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 22
- 239000010408 film Substances 0.000 claims description 71
- 238000010030 laminating Methods 0.000 claims description 62
- 230000008859 change Effects 0.000 claims description 13
- 239000012788 optical film Substances 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000005816 glass manufacturing process Methods 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 9
- 239000012943 hotmelt Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 239000004831 Hot glue Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 2
- 230000003760 hair shine Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000009824 pressure lamination Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention discloses a stepless color-changing glass preparation process and stepless color-changing glass. According to the invention, the stepless color-changing film and the protective glass are bonded by adopting the low-temperature thermoplastic optical adhesive film, the required temperature for converting the low-temperature thermoplastic optical adhesive film into a hot-melt state is low, high-temperature treatment is not needed in the hot-pressing process, the upper pressing plate and the lower pressing plate are simultaneously used for pressing the bonded body at two sides in the hot-pressing process, and the two layers of low-temperature thermoplastic optical adhesive films in the bonded body are simultaneously heated, so that the hot-pressing time of the bonded body is shortened, the influence of the temperature and the pressure on liquid crystal in the stepless color-changing film is reduced, and the preparation yield of the stepless color-changing glass is improved.
Description
Technical Field
The invention relates to the technical field of stepless color-changing glass preparation, in particular to a stepless color-changing glass preparation process and stepless color-changing glass.
Background
The traditional dimming glass can only fix two pictures, namely transparent and frosted pictures, the pictures are single, the stepless color-changing glass can realize gradual change of the glass, the glass presents stepless change of color depth, the stepless color-changing glass is prepared by clamping a stepless color-changing film through two layers of glass, stepless color-changing liquid crystal in the stepless color-changing film is fragile and is greatly influenced by temperature and pressure, the liquid crystal can be damaged by adopting the traditional mode of preparing the dimming glass through high-temperature high-pressure lamination, and the preparation yield of the stepless color-changing glass is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a preparation process of the stepless color-changing glass, which can reduce the damage to liquid crystal and improve the preparation yield of the stepless color-changing glass.
The invention also provides the stepless color-changing glass prepared by the stepless color-changing glass preparation process.
According to a first aspect of the invention, a stepless color-changing glass preparation process comprises the following steps:
laminating, namely preparing two low-temperature thermoplastic optical adhesive films, two protective glasses and a stepless color-changing film to obtain a laminating body of the protective glass, the low-temperature thermoplastic optical adhesive films, the stepless color-changing film, the low-temperature thermoplastic optical adhesive films and the protective glass which are laminated in sequence;
Hot pressing, namely setting an upper pressing plate and a lower pressing plate, wherein the upper pressing plate and the lower pressing plate respectively press the two sides of the laminating body at the same time at a preset temperature, and converting the low-temperature thermoplastic optical adhesive film into a molten state;
And curing the low-temperature thermoplastic optical adhesive film to enable the low-temperature thermoplastic optical adhesive film to be completely adhered to the protective glass and the stepless color-changing film.
The preparation process of the stepless color-changing glass has at least the following beneficial effects:
In the embodiment of the invention, the continuously variable color film and the protective glass are bonded by adopting the low-temperature thermoplastic optical adhesive film, the required temperature for converting the low-temperature thermoplastic optical adhesive film into a hot melting state is low, high-temperature treatment is not needed in the hot pressing process, the upper pressing plate and the lower pressing plate are simultaneously used for pressing the bonded body at two sides in the hot pressing process, and the two layers of low-temperature thermoplastic optical adhesive films in the bonded body are simultaneously heated, so that the hot pressing time of the bonded body is shortened, the influence of the temperature and the pressure on liquid crystal in the continuously variable color film is reduced, and the preparation yield of the continuously variable color glass is improved.
According to some embodiments of the invention, the hot pressing step comprises:
Placing the attaching body on the surface of the lower pressing plate;
measuring the actual distance between the upper pressing plate and the attaching body;
the descending distance of the upper pressing plate is the sum of the actual distance and the pressing distance.
According to some embodiments of the invention, the upper platen is slowly lifted immediately after the lowering is completed.
According to some embodiments of the invention, the hot pressing step includes providing cushioning on a surface of the lower platen, or on a surface of the lower platen and the upper platen.
According to some embodiments of the invention, the hot pressing step comprises:
Closing the hot-pressing cavity;
Vacuumizing the hot-pressing cavity;
the upper pressing plate descends and presses the laminating body;
breaking the vacuum state in the hot-pressing cavity;
the upper pressing plate is lifted away from the attaching body.
According to some embodiments of the invention, in the hot pressing step, the low temperature thermoplastic optical film flows out to the outer edge of the attaching body and seals the outer edge of the attaching body, and after the hot pressing step, air pressure is applied to the attaching body to discharge air bubbles in the attaching body.
According to some embodiments of the invention, the step of applying air pressure is to blow air towards the conformable body in a direction towards the conformable body on at least one side of the conformable body.
According to some embodiments of the invention, the fitting step comprises:
Attaching for the first time, adsorbing and fixing the low-temperature thermoplastic optical adhesive film, tearing off a release film on one side of the low-temperature thermoplastic optical adhesive film, exposing the adhesive film on one side, and attaching to the surface of the protective glass;
The second attaching, namely tearing off the release film on the other side of the low-temperature thermoplastic optical adhesive film, exposing the adhesive film on the other side, and attaching the release film on one side of the stepless color-changing film;
wherein the first attaching and the second attaching are both performed twice, and the first attaching is performed before attaching with the stepless color change film.
According to some embodiments of the invention, the curing step includes providing at least two UV sources and separately illuminating opposite sides of the conformable body.
The stepless color-changing glass according to the embodiment of the second aspect of the invention is manufactured by the preparation process of the stepless color-changing glass according to the embodiment of the first aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of one embodiment of a process for producing a continuously variable color glass of the present invention;
fig. 2 is a schematic structural view of one embodiment of the continuously variable color glass of the present invention.
Reference numerals:
the glass comprises a stepless color-changing glass 100, a protective glass 110, a stepless color-changing film 120 and an adhesive layer 130.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1, the embodiment of the invention provides a preparation process of stepless color-changing glass, which comprises the following steps of attaching, hot pressing and fixing, and specifically:
The laminating step comprises the steps of firstly preparing two low-temperature thermoplastic optical adhesive films matched with the specification of the protective glass, two protective glass and a stepless color-changing film, and then attaching to obtain a laminating body of the protective glass, the low-temperature thermoplastic optical adhesive films, the stepless color-changing film, the low-temperature thermoplastic optical adhesive films and the protective glass which are laminated in sequence; the low-temperature thermoplastic optical film has the characteristic of melting at low temperature and is used for bonding the stepless color-changing film and the protective glass.
The hot pressing step includes setting an upper pressing plate and a lower pressing plate, wherein the upper pressing plate and the lower pressing plate are mutually matched to carry out hot pressing on a laminating body, the upper pressing plate and the lower pressing plate are respectively provided with preset temperatures to respectively press and cover two sides of the laminating body, the two sides of the laminating body are simultaneously subjected to pressure of the pressing plate, heat transferred by the pressing plate is received, two layers of low-temperature thermoplastic optical adhesive films in the laminating body are heated and converted into a molten state, and flow between the stepless color changing film and the protective glass so as to fully fill gaps between the stepless color changing film and the protective glass, and the attaching flatness between the protective glass and the stepless color changing film is high.
When the low-temperature thermoplastic optical adhesive film is solidified, a crosslinking reaction occurs, the protective glass and the stepless color-changing film attached to the protective glass are stably adhered, the stepless color-changing film is clamped between the two protective glasses, the protective glass plays a role in protecting the stepless color-changing film, and the stepless color-changing glass is combined to form the stepless color-changing glass with stable structure.
Therefore, in the embodiment of the invention, the low-temperature thermoplastic optical adhesive film is adopted to bond the stepless color-changing film and the protective glass, the required temperature for converting the low-temperature thermoplastic optical adhesive film into a hot-melting state is low, high-temperature treatment is not needed in the hot-pressing process, the upper pressing plate and the lower pressing plate are simultaneously used for pressing the laminating body on two sides in the hot-pressing process, the two layers of low-temperature thermoplastic optical adhesive films in the laminating body are simultaneously heated, the hot-pressing time of the laminating body can be shortened, the influence of the temperature and the pressure on liquid crystal in the stepless color-changing film is reduced, and the preparation yield of the stepless color-changing glass is improved.
The low-temperature thermoplastic Optical adhesive film can be selected from a UV (ultraviolet) curing type Optical transparent hot melt adhesive film (Thermal-melt Optical CLEAR ADHESIVE, TOCA) with Optical performance, the adhesive film has higher light transmittance, does not influence the color gradual change of the stepless color-changing film, has better ductility, has good flow property after heating, can prevent the rebound of the adhesive film and the situation of material buckling deformation, has strong self-adhesive force and high adhesive strength, and can firmly adhere the stepless color-changing film and the protective glass.
The upper pressing plate and the lower pressing plate should have smooth surfaces, on the one hand, a placing plane with higher flatness is provided for the laminating body, on the other hand, the laminating body can be uniformly pressed, so that stress on different areas of the laminating body is uniform, the situation that the melting degree of the different areas of the low-temperature thermoplastic optical adhesive film is different is avoided, and the flatness of the laminating body after hot pressing is ensured.
In one embodiment, the hot pressing step includes first placing the conformable body on the surface of the lower platen, measuring an actual distance between the upper platen and the conformable body by the distance measuring element, and then controlling the upper platen to descend, and the descending distance of the upper platen is a sum of the actual distance and the nip distance. After the upper pressing plate descends by the actual distance, the surface of the upper pressing plate is contacted with the attaching body, but the attaching body is not pressed, at the moment, the attaching body is heated, the low-temperature thermoplastic optical adhesive film is gradually converted into a molten state, when the upper pressing plate continues to descend by the closing distance, the pressing plate presses the attaching body, the pressure is gradually increased, under the action of the pressure, the adhesive film converted into the molten state flows between the stepless color changing film and the protective glass, and air between the stepless color changing film and the protective glass is discharged, so that the sealing degree between the stepless color changing film and the protective glass is increased.
The distance measurement is carried out before hot pressing, so that the descending distance of the upper pressing plate can be accurately controlled, and the situation that the liquid crystal of the stepless color change film is damaged due to the fact that the pressure of the upper pressing plate on a laminating body is too large due to the fact that the upper pressing plate excessively descends is prevented; in addition, the same pressing distance can be set for the preparation of the stepless color-changing glass in the same batch, and the consistency of the prepared stepless color-changing glass can be improved.
Because the low-temperature thermoplastic optical adhesive film is converted from a solid state to a liquid state during hot pressing, the laminating body has a certain deformation allowance in the pressing direction, and the laminating body cannot be damaged even if the upper pressing plate descends for a pressing distance when the pressing plate presses the laminating body. The lamination distance should be determined according to parameters such as the thickness of the low temperature thermoplastic optical film and the bearing strength of the protective glass, in one embodiment, the lamination distance is not more than 1mm, so that the laminated body is stably laminated by the pressing plate on the premise of not being damaged, and the melting and flowing of the low temperature thermoplastic optical film are realized.
The upper pressing plate can adopt a mode of combined driving of the screw rod and the air cylinder to control the descending distance and the pressing pressure of the upper pressing plate so as to avoid high pressure damage to liquid crystal. In one embodiment, the movement of the actual distance of the upper pressing plate is driven by an air cylinder, the air cylinder drives the upper pressing plate to quickly descend, the descending time of the upper pressing plate can be shortened, the hot pressing efficiency is improved, the movement of the pressing distance of the upper pressing plate is driven by a screw rod, the upper pressing plate is driven by the screw rod to slowly descend so as to reduce the impact of the pressing plate on a laminating body and prevent damage to the stepless color changing film, the low-temperature thermoplastic optical adhesive film is stably pressed, can stably flow between the stepless color changing film and the protective glass, and can uniformly fill gaps between the stepless color changing film and the protective glass and prevent excessive overflow of the low-temperature thermoplastic optical adhesive film.
In addition, after the upper pressing plate is lowered, the upper pressing plate is immediately and slowly lifted, and the upper pressing plate can be driven by the screw rod during the movement of the pressing distance, so that the force application process of the pressing plate to the laminating body only exists during the movement of the upper pressing plate for the pressing distance, the time for pressing the laminating body is shorter, the influence of the pressure on the liquid crystal with the stepless color change film can be reduced, and the upper pressing plate is contacted with the laminating body during the lowering and lifting of the pressing distance and applies pressure to the laminating body, so that the pressing plate presses the laminating body within enough time, and the flowing of the low-temperature thermoplastic optical adhesive film is more sufficient; in addition, as the upper pressing plate is driven by the screw rod, the lifting process of the upper pressing plate is stable enough, so that the low-temperature thermoplastic optical adhesive film keeps a stable flowing state, and the phenomenon that the low-temperature thermoplastic optical adhesive film bounces or air enters between the stepless color-changing film and the protective glass to form bubbles due to the fact that the pressure of the pressing plate is removed quickly is avoided.
In order to avoid damaging the bonded body due to hard contact between the pressing plate and the bonded body in the hot pressing process, in one embodiment of the invention, in the hot pressing step and before pressing, a soft cushion is arranged on the surface of the lower pressing plate or the surface of the lower pressing plate and the surface of the upper pressing plate, the soft cushion has certain deformability, and when the pressing plate presses the bonded body, the soft cushion can buffer the pressing force of the pressing plate on the bonded body, so that the pressing of the upper pressing plate on the bonded body is more stable when the pressing distance is reduced and lifted, and the damage to the protective glass due to the hard contact of the pressing plate and the protective glass can be avoided.
In order to prevent the external environment from influencing the hot pressing effect, a relatively airtight vacuum hot pressing environment is provided for hot pressing, specifically, an upper box body is arranged, after a laminating body is placed on a lower pressing plate, the lower pressing plate moves to the lower part of the upper box body, then the upper box body descends and is buckled above the lower pressing plate, so that an airtight hot pressing cavity is formed between the upper box body and the lower pressing plate, the hot pressing cavity is closed through buckling of the upper box body to the lower pressing plate, the laminating body is isolated from the external environment, and then the hot pressing cavity is vacuumized, so that the laminating body is in a vacuum environment, and air is prevented from entering between a stepless color changing film and protective glass and forming bubbles in the hot pressing process.
After the hot-pressing cavity forms a vacuum environment, the upper pressing plate descends and presses the attaching body, and the upper pressing plate and the lower pressing plate are combined to apply pressure to the attaching body and transfer heat to the attaching body, so that the low-temperature thermoplastic optical adhesive film is quickly melted and flows; when the laminating body is in the laminating state of the upper pressing plate and the lower pressing plate, the vacuum state in the hot pressing cavity is broken, so that the laminating body is adapted to the atmosphere in advance, and external air cannot enter the laminating body due to the fact that the laminating body is laminated; along with the gradual rising of the upper pressing plate, the upper pressing plate is lifted away from the attaching body, at the moment, the pressure of the pressing plate on the attaching body is removed, the attaching body is in an atmospheric pressure environment, and the low-temperature thermoplastic optical adhesive film is still in a free flowing state, so that the rebound of the low-temperature thermoplastic optical adhesive film caused by overlarge pressure change amplitude can be avoided; after the upper pressing plate is restored to an initial state, the upper box body is lifted away from the lower pressing plate, the hot pressing cavity is opened, and the attaching body can move out of the hot pressing station along with the lower pressing plate, so that the next attaching body can be subjected to hot pressing.
It should be noted that when the upper pressing plate and the lower pressing plate cover the laminating body, the preset temperatures of the upper pressing plate and the lower pressing plate are the same, so that the two layers of low-temperature thermoplastic optical adhesive films in the laminating body are subjected to the same pressing action, the upper pressing plate and the lower pressing plate can be heated to the preset temperatures at the same time during hot pressing, or the upper pressing plate and the lower pressing plate are heated to the preset temperatures before hot pressing, so that the hot pressing efficiency is improved; in addition, as the laminating body is placed on the surface of the lower pressing plate before hot pressing, the lower pressing plate can set a certain temperature and transfer heat to the laminating body, and the laminating body is softened after being heated, the hot pressing time of simultaneously laminating the upper pressing plate and the lower pressing plate on the laminating body can be shortened, and the influence of the temperature on the stepless color changing film is reduced; further, as the lower pressing plate transfers heat to the laminating body before hot pressing, the preset temperature of the lower pressing plate can be slightly less than the preset temperature of the upper pressing plate, so that the low-temperature thermoplastic optical adhesive films at two sides in the laminating body are heated more uniformly.
In one embodiment, the method further comprises a defoaming step, wherein the defoaming step is arranged after the hot-pressing step and is used for further discharging bubbles of the bonding body and optimizing bonding quality. In the defoaming step, in a mode of applying air pressure to the laminating body, air bubbles in the laminating body are pressed to flow to the edge of the laminating body and are discharged, so that air cannot enter the laminating body in the defoaming process.
It should be noted that, because the low temperature thermoplastic optical film is heated and melted and has flowing characteristics, when in hot pressing, the low temperature thermoplastic optical film is easy to flow to the edge of the attached body after being converted into liquid state, the edge sealing effect of the attached body is achieved through the overflow of the film, and the gap filling between the protective glass and the stepless color changing film is more sufficient by the low temperature thermoplastic optical film.
In one embodiment, the step of applying the air pressure is to blow air to the attaching body along the direction towards the attaching body on at least one side of the attaching body, and apply pressure to the attaching body in an air blowing mode, wherein the pressure applied to the attaching body is softer, and the stepless color-changing film is less influenced by the pressure. In other embodiments, the pressure application region gradually diffuses from the central region of the conformable body to the edge region of the conformable body, facilitating the flow of air bubbles within the conformable body to the edge of the conformable body and facilitating the evacuation of air bubbles.
In addition, the attaching step comprises a twice attaching process, wherein the first attaching is the mutual attaching between the low-temperature thermoplastic optical adhesive film and the protective glass, the second attaching is the attaching between the low-temperature thermoplastic optical adhesive film and the stepless color-changing film, the first attaching and the second attaching both comprise two times, one side of the protective glass is attached to one side of the low-temperature thermoplastic optical adhesive film and is carried out twice, the second attaching is carried out twice, and in the first attaching, one side of the non-attached part of the low-temperature thermoplastic optical adhesive film and the other side of the stepless color-changing film are attached and are carried out twice.
Specifically, the first attaching comprises the steps of adsorbing and fixing the low-temperature thermoplastic optical adhesive film, tearing off a release film on one side of the low-temperature thermoplastic optical adhesive film, exposing the adhesive film on one side, and attaching the exposed side of the adhesive film to the surface of the protective glass; the adhesive film attaching process can be realized by virtue of rollers, scrapers and the like, so that the flatness of the adhesive film attached to the protective glass is improved, the adhesive film is positioned above the protective glass by overturning during attaching, the adhesive film can be gradually attached to the surface of the protective glass under the action of gravity, bubbles between the adhesive film and the protective glass can be reduced, the adhesive film is fixed in a vacuum adsorption low-temperature thermoplastic optical adhesive film mode, the integral form of the adhesive film is not influenced, and the release film is convenient to tear. The second attaching comprises tearing off the release film on the other side of one of the first attaching middle-low temperature thermoplastic optical films, exposing the adhesive film on the other side, attaching the release film on the other side of the other first attaching middle-low temperature thermoplastic optical film with one side of the stepless color-changing film, tearing off the release film on the other side of the other first attaching middle-low temperature thermoplastic optical film, exposing the adhesive film on the other side, and attaching the adhesive film on the side with the other side of the stepless color-changing film to form a attaching body.
In the attaching process, the air can be in a vacuum environment, so that the influence of air and attaching is reduced, and the generation of bubbles is reduced; in addition, in the bonding process, bonding positions among the low-temperature thermoplastic optical adhesive film, the stepless color-changing film and the protective glass can be determined in a visual positioning mode so as to improve bonding precision; in the laminating process, the low temperature thermoplastic optical adhesive film, the stepless color-changing film, the protective glass and the combination of the three can be carried and turned by means of the manipulator, and when the manipulator executes the operation, the combination can be pre-pressed, so that the combination of different parts is more stable.
In addition, the two first attachments are performed before the attachment of the stepless color changing film, for example, the two first attachments are performed before the second attachment, or the first attachment of one of the two first attachments is performed before the second attachment, and the first attachment of the other first attachment is performed in the process of attaching one side of the stepless color changing film and the low-temperature thermoplastic optical adhesive film. The different steps are crossed, so that the preparation beat of the stepless color-changing glass can be shortened, and the preparation efficiency is improved.
After defoaming and cooling the attached body, detecting the attached body, wherein the external appearance detection comprises an external appearance detection machine and an electric performance detection, wherein the external appearance detection mainly is used for observing whether the attached body has obvious non-attached positions, cracks, glue overflow and other phenomena, and the electric performance detection mainly is used for detecting whether the attached body can present a stepless color change effect after being electrified. If the poor fitting position or the poor electrical property detection phenomenon exists, the hot melt adhesive film is not cured and does not have adhesive force, so that the hot melt adhesive film can be torn off, the attaching process is repeated, the waste of parts is avoided, and the rejection rate can be reduced.
In one embodiment of the invention, the low-temperature thermoplastic optical adhesive film is cured in a UV irradiation mode, and the stepless color-changing film is not transparent in an electrified state, so that irradiation is required from two sides of the attaching body, and the low-temperature thermoplastic optical adhesive film on two sides of the stepless color-changing film can be cured. Specifically, set up not less than two UV sources, the UV source distributes in the both sides of laminating body to shines the both sides of laminating body simultaneously, and the internal two-layer low temperature thermoplastic optical adhesive film of laminating receives the UV to shine simultaneously and takes place the crosslinking reaction and solidify, realizes the firm bonding to protection glass and stepless allochroic film, and the UV source of both sides shines simultaneously, can avoid laminating body turn-over, and solidification efficiency is higher.
The invention also provides the stepless color-changing glass 100, which is prepared by the preparation process of the stepless color-changing glass, as shown in fig. 2, the stepless color-changing glass 100 comprises two layers of protective glass 110 and a stepless color-changing film 120 clamped between the two layers of protective glass 110, an adhesive layer 130 is arranged between the stepless color-changing film 120 and the protective glass 110, and the adhesive layer 130 is formed by hot melting and curing a low-temperature thermoplastic optical adhesive film, so that the stepless color-changing glass 100 forms a stable structure. The stepless color change glass 100 can be applied to the fields of automobile windows, building glass and the like.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Claims (9)
1. The stepless color-changing glass preparation process is characterized by comprising the following steps:
laminating, namely preparing two low-temperature thermoplastic optical adhesive films, two protective glasses and a stepless color-changing film to obtain a laminating body of the protective glass, the low-temperature thermoplastic optical adhesive films, the stepless color-changing film, the low-temperature thermoplastic optical adhesive films and the protective glass which are laminated in sequence;
The method comprises the steps of hot pressing, namely setting an upper pressing plate and a lower pressing plate, wherein the upper pressing plate and the lower pressing plate respectively press the two sides of the laminating body at the preset temperature, after the upper pressing plate descends by an actual distance, the surface of the upper pressing plate is in contact with the laminating body, but the laminating body is not pressed, at the moment, the laminating body is heated, the low-temperature thermoplastic optical adhesive film is gradually converted into a molten state, when the upper pressing plate continuously descends by the closing distance, the pressing plate presses the laminating body, the low-temperature thermoplastic optical adhesive film converted into the molten state flows between the stepless color-changing film and the protective glass, and air between the stepless color-changing film and the protective glass is discharged, and after the upper pressing plate descends, the laminating body is slowly lifted immediately;
And curing the low-temperature thermoplastic optical adhesive film to enable the low-temperature thermoplastic optical adhesive film to be completely adhered to the protective glass and the stepless color-changing film.
2. The stepless color change glass preparation process according to claim 1, wherein the hot pressing step comprises:
Placing the attaching body on the surface of the lower pressing plate;
measuring the actual distance between the upper pressing plate and the attaching body;
the descending distance of the upper pressing plate is the sum of the actual distance and the pressing distance.
3. The continuously variable color glass manufacturing process according to claim 2, wherein the hot pressing step includes providing a cushion on the surface of the lower platen or the surfaces of the lower platen and the upper platen.
4. The stepless color change glass preparation process according to claim 1, wherein the hot pressing step comprises:
Closing the hot-pressing cavity;
Vacuumizing the hot-pressing cavity;
the upper pressing plate descends and presses the laminating body;
breaking the vacuum state in the hot-pressing cavity;
the upper pressing plate is lifted away from the attaching body.
5. The process according to claim 1, wherein in the hot pressing step, the low temperature thermoplastic optical film flows out to the outer edge of the bonded body and seals the outer edge of the bonded body, and after the hot pressing step, air pressure is applied to the bonded body to discharge air bubbles in the bonded body.
6. The process for producing continuously variable transmission glass according to claim 5, wherein said step of applying air pressure is to blow air toward said adherend on at least one side of said adherend in a direction toward said adherend.
7. The stepless color change glass preparation process according to claim 1, wherein the fitting step comprises:
Attaching for the first time, adsorbing and fixing the low-temperature thermoplastic optical adhesive film, tearing off a release film on one side of the low-temperature thermoplastic optical adhesive film, exposing the adhesive film on one side, and attaching to the surface of the protective glass;
The second attaching, namely tearing off the release film on the other side of the low-temperature thermoplastic optical adhesive film, exposing the adhesive film on the other side, and attaching the release film on one side of the stepless color-changing film;
wherein the first attaching and the second attaching are both performed twice, and the first attaching is performed before attaching with the stepless color change film.
8. The process for producing continuously variable transmission glass according to claim 1, wherein said curing step comprises providing at least two UV sources and irradiating opposite sides of said adherend, respectively.
9. Continuously variable glass, characterized in that it is produced by a continuously variable glass production process according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210364308.9A CN114714737B (en) | 2022-04-08 | Stepless color-changing glass preparation process and stepless color-changing glass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210364308.9A CN114714737B (en) | 2022-04-08 | Stepless color-changing glass preparation process and stepless color-changing glass |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113002085A (en) * | 2021-02-24 | 2021-06-22 | 浙江精一新材料科技有限公司 | Optical active device and preparation method thereof |
| CN113409690A (en) * | 2021-06-08 | 2021-09-17 | 深圳全息界科技有限公司 | Large-size display screen laminating process |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113002085A (en) * | 2021-02-24 | 2021-06-22 | 浙江精一新材料科技有限公司 | Optical active device and preparation method thereof |
| CN113409690A (en) * | 2021-06-08 | 2021-09-17 | 深圳全息界科技有限公司 | Large-size display screen laminating process |
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