CN114714737A - 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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- CN114714737A CN114714737A CN202210364308.9A CN202210364308A CN114714737A CN 114714737 A CN114714737 A CN 114714737A CN 202210364308 A CN202210364308 A CN 202210364308A CN 114714737 A CN114714737 A CN 114714737A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
Abstract
The invention discloses a stepless color-changing glass preparation process and the 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-melting state is lower, high-temperature treatment is not required in the hot-pressing process, the upper pressing plate and the lower pressing plate simultaneously press and cover the attaching body on two sides, and two layers of low-temperature thermoplastic optical adhesive films in the attaching body are simultaneously heated, so that the low-temperature thermoplastic optical adhesive films can be melted in a short time, the hot-pressing time of the attaching body is shortened, the influence of the temperature and the pressure on liquid crystals 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 transparent and frosted pictures, the pictures are single, the stepless color-changing glass can realize gradual change of the glass, the glass is enabled to show stepless change of the color depth, the stepless color-changing glass is prepared by clamping the stepless color-changing film by two layers of glass, stepless color-changing liquid crystals in the stepless color-changing film are fragile and greatly influenced by temperature and pressure, the traditional mode of preparing the dimming glass through high-temperature and high-pressure lamination is adopted to prepare the stepless color-changing glass, the liquid crystals can be damaged, and the preparation yield of the stepless color-changing glass is reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of 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 preparation process of the stepless color-changing glass.
According to the first aspect of the invention, the stepless color-changing glass preparation process comprises the following steps:
laminating, namely preparing two low-temperature thermoplastic optical adhesive films, two pieces of protective glass and a stepless color changing film to obtain a laminated body formed by sequentially laminating 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;
hot pressing, namely arranging an upper pressing plate and a lower pressing plate, wherein the upper pressing plate and the lower pressing plate simultaneously press and cover two sides of the attaching body at preset temperatures respectively, and the low-temperature thermoplastic optical adhesive film is converted into a molten state;
and curing the low-temperature thermoplastic optical adhesive film to enable the low-temperature thermoplastic optical adhesive film to completely bond the protective glass and the stepless color-changing film.
The preparation process of the stepless color-changing glass provided by the embodiment of the invention at least has the following beneficial effects:
in the embodiment of 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-melting state is lower, high-temperature treatment is not required in the hot-pressing process, the upper pressing plate and the lower pressing plate simultaneously press and cover the attaching body on two sides, and two layers of low-temperature thermoplastic optical adhesive films in the attaching body are simultaneously heated, so that the low-temperature thermoplastic optical adhesive films can be melted in a short time, the hot-pressing time of the attaching body is shortened, the influence of the temperature and the pressure on liquid crystals in the stepless color-changing film is reduced, and the preparation yield of the stepless color-changing 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 pressure plate and the attaching body;
and the descending distance of the upper pressure plate is the sum of the actual distance and the pressing distance.
According to some embodiments of the invention, the upper platen is slowly raised immediately after the lowering is completed.
According to some embodiments of the invention, the hot pressing step comprises providing a cushion on a surface of the lower platen, or a surface of the lower platen and a surface of 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 attaching body;
breaking the vacuum state in the hot-pressing cavity;
the upper pressure 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 adhesive film flows out to the outer edge of the attached body and seals the outer edge of the attached body, and after the hot pressing step, air pressure is applied to the attached body to exhaust air bubbles in the attached body.
According to some embodiments of the invention, the step of applying air pressure is blowing 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 attaching step comprises:
attaching for the first time, adsorbing and fixing the low-temperature thermoplastic optical adhesive film, tearing off the release film on one side of the low-temperature thermoplastic optical adhesive film, exposing the adhesive film on one side, and attaching the adhesive film to the surface of the protective glass;
second attaching, namely tearing off the release film on the other side of the low-temperature thermoplastic optical adhesive film to expose the adhesive film on the other side, and attaching the release film to 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 the attaching of the stepless color-changing film.
According to some embodiments of the invention, the curing step comprises providing at least two UV sources and irradiating respectively two opposite sides of the conformable body.
The stepless color-changing glass provided by the embodiment of the second aspect of the invention is prepared by the stepless color-changing glass preparation process provided by 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 following figures and examples, in which:
FIG. 1 is a flow chart of one embodiment of a process for preparing a stepless color-changing glass according to the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the stepless color-changing glass of the invention.
Reference numerals:
the glass comprises stepless color-changing glass 100, protective glass 110, a stepless color-changing film 120 and an adhesive layer 130.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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 otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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, an embodiment of the present invention provides a process for preparing a stepless color-changing glass, including steps of attaching, hot-pressing, and fixing, specifically:
the laminating step comprises the steps of firstly preparing two low-temperature thermoplastic optical adhesive films matched with the specifications of the protective glass, two protective glasses and the stepless color-changing film, and then obtaining a laminating body formed by sequentially laminating 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 through adhesion; the low-temperature thermoplastic optical adhesive 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, set up top board and holding down plate, the top board is mutually supported with the holding down plate and is carried out the hot pressing to the laminating body, the both sides that the laminating body was pressed respectively to the temperature is predetermine respectively to top board and holding down plate, the both sides of laminating body receive the pressure of clamp plate simultaneously, and receive the heat that the clamp plate transmitted, two-layer low temperature thermoplastic optics glued membrane in the laminating body is heated and is turned into molten condition, and flow between stepless color-changing membrane and protection glass, in order to fully fill the space between stepless color-changing membrane and the protection glass, the attached roughness between protection glass and the stepless color-changing membrane is high, under the effect of pressure of clamp plate, stepless color-changing membrane and protection glass in close contact with.
When the low-temperature thermoplastic optical adhesive film is cured, a cross-linking reaction occurs, the protective glass and the stepless color-changing film which are attached to the protective glass are stably bonded, the stepless color-changing film is clamped between the two pieces of protective glass, the protective glass plays a role in protecting the stepless color-changing film, and the stepless color-changing glass with a stable structure is formed by combination.
Therefore, in the embodiment of 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 lower, high-temperature treatment is not required in the hot-pressing process, the upper pressing plate and the lower pressing plate simultaneously press the attaching body on two sides, and the two layers of low-temperature thermoplastic optical adhesive films in the attaching body are simultaneously heated, so that the low-temperature thermoplastic optical adhesive films can be melted in a short time, the hot-pressing time of the attaching body is shortened, the influence of temperature and 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 a UV-curable Optical Clear Adhesive film (TOCA) with Optical performance, has high light transmittance, does not influence the color gradient of the stepless color-changing film, has good ductility, good fluidity after heating, can prevent the rebound of the Adhesive film and the warping deformation of the material, has strong self-adhesion and high bonding strength, and can firmly bond the stepless color-changing film and the protective glass.
The upper press plate and the lower press plate should have smooth surfaces, provide the higher plane of placing of roughness for the laminating body on the one hand, on the other hand can evenly exert pressure to the laminating body, makes the different region atress of laminating body even, avoids appearing the condition that the different region melting degree of low temperature thermoplastic optical coating has the difference, guarantees the roughness after the laminating body hot pressing.
In one embodiment, the hot pressing step includes firstly placing the fitting body on the surface of the lower pressing plate, measuring an actual distance between the upper pressing plate and the fitting body through the distance measuring element, and then controlling the upper pressing plate to descend, wherein the descending distance of the upper pressing plate is the sum of the actual distance and the pressing distance. After the upper press plate descends the actual distance, the surface of upper press plate contacts with the laminating body, but does not exert pressure, and the laminating body is heated this moment, and the low temperature thermoplasticity optics glued membrane converts the molten state into gradually, and when the upper press plate continued to descend the pressfitting distance, the clamp plate exerted pressure to the laminating body, and pressure increases gradually, and under the pressure effect, the glued membrane that converts the molten state into flows between stepless color-changing membrane and protective glass, and the air between the two discharges to increase the driving fit degree between stepless color-changing membrane and the protective glass.
The distance measurement is carried out before the hot pressing, so that the descending distance of the upper pressing plate can be accurately controlled, and the phenomenon that the upper pressing plate excessively descends to cause overlarge pressure of the upper pressing plate on the attaching body and damage to liquid crystals of the stepless color-changing film is avoided; in addition, the same pressing distance can be set for the preparation of the stepless color-changing glass of the same batch, and the consistency of the stepless color-changing glass after preparation can be improved.
Because the low-temperature thermoplastic optical adhesive film is converted from a solid state into a liquid state during hot pressing, the attaching body has a certain deformation allowance in the pressing direction, and when the pressing plate presses the attaching body, the attaching body cannot be damaged even if the pressing distance of the upper pressing plate is reduced. The pressing distance is determined according to parameters such as the thickness of the low-temperature thermoplastic optical adhesive film, the pressure-bearing strength of the protective glass and the like, and in one embodiment, the pressing distance is not more than 1mm, so that the attaching body is stably pressed and covered by the pressing plate on the premise of not being damaged, and the melting and flowing of the low-temperature thermoplastic optical adhesive film are realized.
The upper pressure plate can adopt a screw rod and cylinder combined driving mode to realize the control of the descending distance and the pressing pressure of the upper pressure plate so as to avoid high pressure from damaging liquid crystals. 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 rapidly 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 screw rod drives the upper pressing plate to slowly descend, so that the impact of the pressing plate on the laminating body is reduced, the stepless color-changing film is prevented from being damaged, the low-temperature thermoplastic optical adhesive film is stably pressed, the low-temperature thermoplastic optical adhesive film can stably flow between the stepless color-changing film and the protective glass, the gap between the stepless color-changing film and the protective glass is uniformly filled, and the low-temperature thermoplastic optical adhesive film can be prevented from excessively overflowing.
In addition, the upper pressure plate is lifted up slowly immediately after the upper pressure plate is lowered, the upper pressure plate can be driven by the lead screw during the moving and pressing distance, so that the force application process of the pressure plate on the attached body only exists during the moving and pressing distance of the upper pressure plate, the pressing time of the attached body is short, the influence of the pressure on the liquid crystal of the stepless color-changing film can be reduced, and the upper pressure plate is contacted with the attached body and applies pressure to the attached body in the lowering and lifting processes of the pressing distance, so that the pressure plate covers the attached body in enough time, and the flow of the low-temperature thermoplastic optical adhesive film is more sufficient; in addition, 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 is kept in a stable flowing state, and the phenomenon that the low-temperature thermoplastic optical adhesive film rebounds 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 damage to the attaching body in the hot pressing process due to rigid contact between the pressing plate and the attaching body, in the hot pressing step and before pressing, a soft cushion is arranged on the surface of the lower pressing plate or the surfaces of the lower pressing plate and the upper pressing plate, the soft cushion has certain deformation capacity, and when the pressing plate presses the attaching body, the soft cushion can buffer the pressing force of the pressing plate on the attaching body, so that the pressing force of the pressing plate on the attaching body is more stable when the upper pressing plate descends and lifts up the pressing distance, and damage to the protective glass due to rigid contact between the pressing plate and the protective glass can be avoided.
In order to prevent the external environment from affecting the hot pressing effect, in one embodiment of the invention, a relatively closed vacuum hot pressing environment is provided for hot pressing, specifically, an upper box body is provided, after the attachment 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 on the upper part of the lower pressing plate, so that a closed 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 attachment body is isolated from the external environment, then the hot pressing cavity is vacuumized, so that the attachment body is in the vacuum environment, and air is prevented from entering between the stepless color changing film and the protective glass and forming bubbles in the hot pressing process.
After the vacuum environment is formed in the hot-pressing cavity, the upper pressing plate descends and presses and covers the attaching body, and the combination of the upper pressing plate and the lower pressing plate applies pressure to the attaching body and transfers heat to the attaching body, so that the low-temperature thermoplastic optical adhesive film is quickly melted and flows; when the attaching body is in a pressing state of the upper pressing plate and the lower pressing plate, the vacuum state in the hot pressing cavity is broken, so that the attaching body adapts to the atmospheric environment in advance, and external air cannot enter the interior of the attaching body due to the pressing of the attaching body; the upper pressure plate is lifted away from the attaching body along with the gradual rise of the upper pressure plate, at the moment, the pressure of the pressure plate on the attaching body is removed, the attaching body is in an atmospheric pressure environment, the low-temperature thermoplastic optical adhesive film is still in a free flowing state, and the rebound of the low-temperature thermoplastic optical adhesive film caused by overlarge pressure change amplitude can be avoided; after the upper pressing plate recovers the initial state, the upper box body is lifted away from the lower pressing plate, the hot pressing cavity is opened, the attaching body can move out of the hot pressing station along with the lower pressing plate, and the next attaching body is convenient to carry out hot pressing.
It should be noted that, when the upper pressing plate and the lower pressing plate are pressed on the bonded 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 films in the bonded body are subjected to the same pressing action, and the upper pressing plate and the lower pressing plate can be heated to the preset temperature at the same time during hot pressing, or the upper pressing plate and the lower pressing plate are heated to the preset temperature before hot pressing, so as to improve the hot pressing efficiency; in addition, the attaching body is placed on the surface of the lower pressing plate before hot pressing, the lower pressing plate can be set at a certain temperature and transfers heat to the attaching body, and the attaching body is softened after being heated, so that the hot pressing time of the upper pressing plate and the lower pressing plate for simultaneously pressing the attaching body can be shortened, and the influence of the temperature on the stepless color-changing film is reduced; furthermore, because the lower pressing plate transfers heat to the attaching body before hot pressing, the preset temperature of the lower pressing plate can be slightly lower than that of the upper pressing plate, so that the low-temperature thermoplastic optical adhesive films on two sides in the attaching 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 fitting body and optimizing the fitting quality. In the defoaming step, bubbles in the attaching body are pressurized to flow to the edge of the attaching body and discharged in a mode of applying air pressure to the attaching body, and in order to prevent the gas from entering the attaching body in the defoaming process, in the embodiment of the invention, when the hot-pressing step is executed, the low-temperature thermoplastic optical adhesive film flows to the outer edge of the attaching body and seals the outer edge of the attaching body, so that the edge sealing effect of the attaching body is realized, and therefore, even if the air pressure is applied to the attaching body in the defoaming process, the gas cannot enter the attaching body due to the fact that the edge of the attaching body is in a sealed state, and the attaching quality is improved.
It should be noted that, because the low-temperature thermoplastic optical adhesive film is heated and melted and has a flowing characteristic, when hot-pressed, the low-temperature thermoplastic optical adhesive film is converted into a liquid state and then easily flows to the edge of the attachment body, and the edge sealing effect on the attachment body is achieved by the overflow of the adhesive film, so that the gap between the protective glass and the stepless color-changing film is more fully filled by the low-temperature thermoplastic optical adhesive film.
In one embodiment, the step of applying air pressure is to blow air to the attachment body along a direction toward the attachment body on at least one side of the attachment body, and apply pressure to the attachment body in an air blowing manner, so that the attachment body is subjected to softer pressure, and the influence of the pressure on the stepless color-changing film is smaller. In other embodiments, the pressure applying region gradually spreads from the central region of the fitting body to the edge region of the fitting body, which is beneficial to flowing the bubbles in the fitting body to the edge of the fitting body, so as to facilitate discharging the bubbles.
In addition, the attaching step comprises two attaching processes, wherein the first attaching process is the mutual attaching process between the low-temperature thermoplastic optical adhesive film and the protective glass, the second attaching process is the attaching process between the low-temperature thermoplastic optical adhesive film and the stepless color changing film, the first attaching process and the second attaching process both comprise two times, the first attaching process of the two times is carried out, 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 process of the two times is carried out, one side of the low-temperature thermoplastic optical adhesive film, which is not attached with a part, is attached to the other side of the stepless color changing film and is carried out twice.
Specifically, the first attaching comprises adsorbing and fixing the low-temperature thermoplastic optical adhesive film, tearing off the 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 attached process of glued membrane can be with the help of gyro wheel, scraper blade etc. to improve the glued membrane to the attached roughness of cover glass, for improving attached convenience, during attached, accessible upset makes the glued membrane be located cover glass's top, and the glued membrane can be under the action of gravity, attached on the cover glass surface gradually, and can reduce the bubble between the two, fix it with the mode of vacuum adsorption low temperature thermoplasticity optics glued membrane, do not influence the whole form of glued membrane, be convenient for tear and remove from the type membrane. The second attaching comprises tearing off a release film on the other side of one of the first attaching medium-low temperature thermoplastic optical adhesive films to expose an adhesive film on the other side, attaching the release film on one side of the stepless color-changing film, tearing off the release film on the other side of the other first attaching medium-low temperature thermoplastic optical adhesive film to expose an adhesive film on the other side, and attaching the adhesive film on the one side and the other side of the stepless color-changing film to form an attaching body.
The attaching process can be carried out in a vacuum environment so as to reduce the influence of air and attaching and reduce the generation of bubbles; in addition, in the laminating process, the laminating position can be determined between the low-temperature thermoplastic optical adhesive film, the stepless color-changing film and the protective glass in a visual positioning mode so as to improve the laminating precision; in the laminating process, the mechanical hand can be used for carrying and overturning the low-temperature thermoplastic optical adhesive film, the stepless color-changing film, the protective glass and the three assembly, and when the mechanical hand executes the operation, the mechanical hand can pre-press the assembly, so that the combination of different parts is more stable.
In addition, the two first times of attachment are both performed before the attachment of the stepless color-changing film, for example, the two first times of attachment are both performed before the second time of attachment, or the first time of attachment is performed before the second time of attachment, and the first time of attachment is performed in the process of attaching one side of the stepless color-changing film and the low-temperature thermoplastic optical adhesive film. Different steps are alternately carried out, so that the preparation beat of the stepless color-changing glass can be shortened, and the preparation efficiency is improved.
After defoaming and the cooling of the attaching body, the attaching body is detected, wherein the detection comprises an appearance detection machine and electrical property detection, the appearance detection mainly comprises the observation of whether the attaching body has the phenomena of obviously non-attaching positions, cracks, glue overflow and the like, and the electrical property detection mainly comprises the detection of whether the attaching body can present a stepless color change effect after being electrified. If the phenomenon of poor laminating position or poor electrical property detection exists, the hot melt adhesive film is not solidified 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 an embodiment of the invention, the low-temperature thermoplastic optical adhesive film is cured by UV irradiation, and since the stepless color-changing film is not transparent in the non-energized state, irradiation needs to be performed from both sides of the attachment body to ensure that the low-temperature thermoplastic optical adhesive film on both sides of the stepless color-changing film can be cured. Two UV sources are no less than in the setting, and the UV source distributes in the both sides of rigging body to shine the both sides of rigging body simultaneously, two-layer low temperature thermoplastic optical glued membrane in the rigging body receives UV simultaneously and shines and take place cross-linking reaction and solidification, realizes the firm bonding to protection glass and stepless color-changing membrane, and the UV source of both sides shines simultaneously, can avoid the rigging body turn-over, and solidification efficiency is higher.
The invention also provides a 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-changing 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 those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. The preparation process of the stepless color-changing glass is characterized by comprising the following steps:
laminating, namely preparing two low-temperature thermoplastic optical adhesive films, two pieces of protective glass and a stepless color changing film to obtain a laminated body formed by sequentially laminating 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;
hot pressing, namely arranging an upper pressing plate and a lower pressing plate, wherein the upper pressing plate and the lower pressing plate simultaneously press and cover two sides of the attaching body at preset temperatures respectively, and the low-temperature thermoplastic optical adhesive film is converted into a molten state;
and curing the low-temperature thermoplastic optical adhesive film to enable the low-temperature thermoplastic optical adhesive film to completely bond the protective glass and the stepless color-changing film.
2. The process for preparing a stepless color-changing glass 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 pressure plate and the attaching body;
and the descending distance of the upper pressure plate is the sum of the actual distance and the pressing distance.
3. The process for preparing infinitely variable color glass according to claim 2, wherein the upper platen is slowly raised immediately after the lowering is completed.
4. The process for preparing stepless color-changing glass according to claim 2 or 3, wherein the hot-pressing step comprises arranging soft pads on the surface of the lower pressing plate, or the surfaces of the lower pressing plate and the upper pressing plate.
5. The process for preparing a stepless color-changing glass 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 attaching body;
breaking the vacuum state in the hot-pressing cavity;
the upper pressure plate is lifted away from the attaching body.
6. The process for preparing infinitely variable color glass according to claim 1, wherein in the hot-pressing step, the low-temperature thermoplastic optical adhesive film flows out to the outer edge of the attached body and seals the outer edge of the attached body, and after the hot-pressing step, air pressure is applied to the attached body to exhaust air bubbles in the attached body.
7. The process of claim 6, wherein the step of applying air pressure blows air into the conformable body in a direction toward the conformable body on at least one side of the conformable body.
8. The process for preparing infinitely variable color glass according to claim 1, wherein the step of attaching comprises:
attaching for the first time, adsorbing and fixing the low-temperature thermoplastic optical adhesive film, tearing off the release film on one side of the low-temperature thermoplastic optical adhesive film, exposing the adhesive film on one side, and attaching the adhesive film to the surface of the protective glass;
second attaching, namely tearing off the release film on the other side of the low-temperature thermoplastic optical adhesive film to expose the adhesive film on the other side, and attaching the release film to 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 the attaching of the stepless color-changing film.
9. The process of claim 1, wherein the curing step comprises providing at least two UV sources and irradiating opposite sides of the laminate, respectively.
10. Stepless color-changing glass, characterized in that it is made by the stepless color-changing glass manufacturing process of any one of claims 1 to 9.
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| CN109593481A (en) * | 2018-11-30 | 2019-04-09 | 深圳全息界科技有限公司 | A kind of low temperature thermoplasticity optical adhesive film dual cure attaching process and display |
| CN112820817A (en) * | 2020-12-31 | 2021-05-18 | 深圳全息界科技有限公司 | Small-spacing LED module packaging process |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109593481A (en) * | 2018-11-30 | 2019-04-09 | 深圳全息界科技有限公司 | A kind of low temperature thermoplasticity optical adhesive film dual cure attaching process and display |
| CN112820817A (en) * | 2020-12-31 | 2021-05-18 | 深圳全息界科技有限公司 | Small-spacing LED module packaging process |
| 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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