31 results about "Polyvinyl butyral" patented technology

The invention relates to the technical field of automobiles, and provides a PVB composite film and a preparation method thereof, laminated glass and an automobile, the PVB composite film comprises a PVB base film and cesium-tungsten bronze composite particles distributed in the PVB base film, each cesium-tungsten bronze composite particle comprises an inner core and a shell layer coating the surface of the inner core, the inner core is made of cesium-tungsten bronze and titanium dioxide, and the shell layer is made of titanium dioxide. And the material of the shell layer comprises polyvinyl butyral. According to the PVB composite film provided by the invention, the material of the cesium-tungsten bronze composite particle shell layer is consistent with that of the PVB base film, so that the compatibility of the cesium-tungsten bronze composite particles and the PVB base film is remarkably improved, the distribution uniformity of the cesium-tungsten bronze composite particles in the PVB base film is favorably improved, and the heat insulation performance of the PVB composite film is greatly improved.

The invention discloses an infrared barrier PVB (polyvinyl butyral) intermediate film and a preparation method, and relates to the technical field of environmental functional glass materials, the intermediate film comprises 60-75 parts of polyvinyl butyral resin, 25-35 parts of a plasticizer, 0.5-3 parts of nano tin antimony oxide, 0.1-0.5 part of an ultraviolet absorbent, 0.05-0.2 part of an antioxidant and 0.1-0.5 part of a dispersant, the preparation method comprises the steps of nano infrared blocking agent pre-dispersion, mixing, twin-screw extrusion molding, tape casting cooling, surface treatment and the like, the surface-modified nano tin antimony oxide is introduced as the infrared blocking agent, infrared radiation at the wave band of 780-1300 nm is effectively blocked, the infrared blocking rate reaches 85% or above, the visible light transmittance is larger than 80%, the technology is mature and stable, the cost is low, and the preparation method is suitable for industrial production. The prepared intermediate film can be applied to building and automobile laminated glass, and the heat insulation and energy saving effects are achieved.

The invention provides transport vehicle laminated glass and an intelligent control system with the transport vehicle laminated glass, and belongs to the technical field of vehicles. The front windshield comprises an outer front windshield body, an inner front windshield body and a thermoplastic middle layer clamped between the outer front windshield body and the inner front windshield body, the outer front windshield body is provided with a first surface and a second surface, the inner front windshield body is provided with a third surface and a fourth surface, and the second surface and the fourth surface are oppositely arranged. An infrared high-transmittance PVB (Polyvinyl Butyral) membrane is locally spliced on the thermoplastic middle layer to form an infrared high-transmittance area of which the infrared transmittance is greater than or equal to 90%; a laser radar is arranged on the third surface of the inner front windshield, and the field angle of the laser radar is aligned with the infrared high-transmittance area so that the transmittance of infrared rays emitted by the laser radar to the front windshield can be larger than or equal to 90%. The middle cementing layer diaphragm adopts a locally-spliced infrared high-transmittance PVB diaphragm structure, so that the problem of infrared signal shielding caused by a metal coating layer is completely avoided.

The invention discloses an optical performance optimization method for PVB (Polyvinyl Butyral) with vanadium dioxide particles. The method comprises the following steps: setting initial values of characteristic parameters of a PVB film and emission parameters of optical signals; calculating optical parameters of the optical signal after each collision with the vanadium dioxide particles in the PVB film to obtain the collision frequency and the displacement value of the optical signal; calculating the collision times and the displacement value after the optical signal collides with the vanadium dioxide particles for multiple times in the PVB film, and determining one or more of the transmissivity, the reflectivity and the absorptivity of the PVB film to the optical signal so as to obtain the optical signal transmission performance of the PVB film; and changing one or more values in the characteristic parameters of the PVB film so as to enable the optical signal transmission performance of the PVB film to meet the specified requirements. By means of the method, the optimal manufacturing parameters of the PVB film can be rapidly obtained based on the set standard, and therefore efficient heat regulation and control windshields can be manufactured conveniently.

The utility model discloses raw material mixing equipment for processing a PVB (Polyvinyl Butyral) composite film. The outer wall of the discharging device is fixedly connected with the outer wall of the stirring device; the utility model relates to the technical field of raw material mixing, the device drives the rotating shaft to rotate through the stirring device and the discharging device, and the stirring bevel gear on the rotating shaft is meshed with the bevel gears on the first rotating rod and the second rotating rod, so that the first stirring blade and the second stirring blade rotate in opposite directions, and raw materials in the stirring barrel can be fully stirred; the rotating plate is rotated, then the baffle is pulled to drive the discharging plate to slide in the sliding groove, the opening and closing degree of the discharging base can be flexibly adjusted, the arc-shaped plate makes contact with the inner wall of the discharging base to play a limiting role, the discharging plate is prevented from being disengaged, the rotating plate and the limiting plate are matched to clamp the baffle, and material leakage caused by vibration in the stirring process can be effectively prevented.

The utility model relates to the technical field of toughened glass, in particular to hot bending toughened glass, which comprises glass layers, PVB (polyvinyl butyral) films, photosensitive shadowless glue and steel wires, the glass layers are respectively arranged on two sides of the PVB films and are attached to the PVB films, gaps exist between the adjacent PVB films, the photosensitive shadowless glue is filled in the gaps, the steel wires are positioned in the gaps, and the steel wires are arranged on the glass layers. The independent PVB film with good bending flexibility and the photosensitive shadowless glue with good bonding strength are matched to bond the glass layer, stress concentration caused by the radian of tempered glass and separation of cullet from the tempered glass can be avoided, and practical significance and popularization value are achieved.

The utility model relates to the technical field of kitchen appliance glass, and discloses an explosion-proof glass structure for kitchen appliances, which comprises a dining car front frame, a glass frame, a matching groove and a connecting plate, and the glass frame is movably connected to the bottom of the dining car front frame. According to the dining car, the glass assembly, the tempered glass, the polyvinyl butyral film and the polycarbonate transparent shell are used in cooperation, when food in the dining car emits heat, the polycarbonate transparent shell has high temperature resistance, and therefore the tempered glass can not be burst by hot steam, and if the tempered glass is burst, the glass can not be damaged. The polyvinyl butyral film can prevent the disintegrating slag from jumping and falling to the ground, and the problem that glass blocks are directly formed by connecting tempered glass with a metal frame, when the glass is grilled and subjected to external force at high temperature, the glass possibly bursts, and the generated disintegrating slag falls into food is solved.

The present invention relates to a film laminate, a smart window comprising the same, and a method for manufacturing the same, the film laminate being characterized by comprising a light-dimming laminate and a surface protective layer laminated on at least one of the upper surface and the lower surface of the light-dimming laminate, the surface protective layer is a low-temperature curable polyvinyl butyral (PVB) film that is cured at a temperature of 90 DEG C or less, has a thickness of 0.01-0.35 mm, and has a larger overall area than the area of the light-dimming laminate in contact with the surface protective layer. According to the present invention, it is possible to manufacture a film laminate which minimizes the pressure applied to a liquid crystal layer during glass bonding and does not cause liquid crystal displacement, thereby preventing the occurrence of liquid crystal speckles and having an excellent appearance.

The invention discloses a PVB film wire distributing device and method, and relates to the technical field of PVB film machining, the PVB film wire distributing device comprises a main body arranged on a workbench and a wire feeding mechanism arranged on the main body and used for conveying tungsten wires, the main body is further provided with a pressing wheel and a heating mechanism, and the pressing wheel is rotationally connected to the main body and used for forcing the tungsten wires to be embedded into a PVB film; the heating mechanism is used for heating the pressing wheel, and in the process that the pressing wheel forces the tungsten filament to be embedded into the PVB film, the pressing wheel heats the PVB film. According to the PVB film wire distribution device and method, when the main body is close to the PVB film, a tungsten wire can be forced to be embedded into the PVB film through the pressing wheel, in the moving process of the main body, the pressing wheel can move on the PVB film and distribute the tungsten wire, in the tungsten wire distribution process, the pressing wheel can heat the PVB film so as to reduce the hardness of the PVB film, and the PVB film is prevented from being damaged. Therefore, the difficulty that the tungsten filament is embedded into the PVB film is reduced, the pressing wheel can keep small pressure so that the tungsten filament can be tightly embedded into the PVB film, and the filament distribution efficiency is further improved.

The invention relates to the technical field of polymer films, in particular to a preparation method of a PVB wedge-shaped film, laminated glass and application of the laminated glass. The preparation method of the PVB wedge-shaped film provided by the invention comprises the following steps: preparing the following components in parts by weight: 60 to 80 parts of polyvinyl butyral, 20 to 40 parts of polyol ester compounds and 0.1 to 0.3 part of benzotriazole phenol compounds; the preparation method comprises the following steps: premixing a polyol ester compound and a benzotriazole phenolic compound to prepare a premix; wherein the pre-mixing temperature is 50 DEG C to 70 DEG C; polyvinyl butyral is heated to 70-80 DEG C, and the polyvinyl butyral and the premix are mixed in batches to prepare a mixture; and extruding the mixture to prepare the PVB wedge-shaped film. According to the preparation method, the consistency and stability of the product thickness can be guaranteed, then the PVB wedge-shaped film with good optical uniformity is prepared, the preparation method is stable and efficient, and the production efficiency can be improved.

The invention relates to the technical field of preparation of glass with special performance, in particular to a radiation refrigeration and electric heating integrated glass structure and a preparation method. The technical problem to be solved is that the glass with the radiation refrigeration function actively emits heat in a low-temperature environment so as to eliminate the technical problem that the surface is frosted at an extremely low temperature. The radiation refrigeration and electric heating integrated glass structurally comprises glass, PDMS (Polydimethylsiloxane), glass, an ITO (Indium Tin Oxide) film, PVB (Polyvinyl Butyral) and glass which are sequentially arranged from top to bottom, and a lead is arranged between the ITO film and the PVB. Through coordinated work of ITO and PDMS and synchronous coupling of electric control Joule heat and passive radiation, a building or an automobile is cooled in summer, and the PDMS layer efficiently radiates heat through an 8-13 [mu] m atmosphere window, so that the surface temperature is lower than the environment temperature by 5-8 DEG C. In winter, after the ITO film layer in the electric heating shielding glass is electrified, electric energy is converted into Joule heat, and rapid temperature rise can be achieved through extremely small square resistance of the ITO film layer.

The utility model discloses a PVB packaging photovoltaic assembly based on double-layer glass. The PVB packaging photovoltaic assembly comprises a frame and a double-glass photovoltaic assembly body installed in the frame. The double-glass photovoltaic module body comprises an upper glass plate and a lower glass plate which are arranged up and down, and a photovoltaic cell panel arranged between the upper glass plate and the lower glass plate; a plurality of battery pieces are uniformly arranged on the upper surface of the photovoltaic cell panel, and the upper surface of the photovoltaic cell panel is also provided with a heat conduction positioning plate which is used for sleeving the plurality of battery pieces one by one and is made of a heat conduction material; a heat conduction pad made of a heat conduction material is arranged between the frame and the double-glass photovoltaic module body, and the outer surface of the frame is also provided with a concave grain groove for increasing the heat dissipation area. According to the utility model, the heat conduction positioning plate can position the battery pieces, so that the battery pieces are prevented from shifting and overlapping in the lamination process, and the heat dissipation of the photovoltaic cell panel is facilitated; and the heat dissipation effect of the photovoltaic cell panel can be further improved through the arranged heat conduction pad and the concave grain groove formed in the outer surface of the frame.

The utility model belongs to the technical field of antennas, specifically provides a glass antenna, and aims to solve the problem that glass of a conventional glass antenna is easy to damage. Therefore, the glass antenna comprises a first glass layer, a first PVB (polyvinyl butyral) dielectric layer, a main radiation structure, a second PVB dielectric layer, a second glass layer, a coupling feed structure and a PCB (printed circuit board) dielectric layer which are sequentially overlapped, and the coupling feed structure is at least opposite to part of the main radiation structure. The main radiation structure and the coupling feed structure can transmit energy signals in a coupling feed mode. The glass antenna transmits energy signals in a coupled feeding mode, avoids direct contact between a feeding connector for direct feeding and glass in the prior art, avoids touch damage of the connector to the glass, greatly protects the glass, facilitates antenna processing, and reduces antenna manufacturing cost.

The utility model relates to the technical field of laminated glass, in particular to low-light-transmittance laminated glass for an automobile, which comprises a shading automobile window mechanism, an outer glass layer and a light-transmitting glass layer. The middle layer is attached to one side of the outer-layer glass; the first inner layer glass is attached to one side of the middle layer; the second inner-layer glass is attached to one side of the first inner-layer glass; and the sunshade unit is arranged at the second inner layer glass and is fixed with the frame. According to the sound insulation and heat insulation film, the middle layer adopts the macromolecule sound insulation and heat insulation film formed by compounding the PVB and the nanometer aerogel, the butyl rubber microspheres are evenly distributed in the film, the nanometer aerogel and the PVB have certain heat insulation performance, heat transfer can be effectively blocked, the temperature in a vehicle can be effectively reduced, the butyl rubber microspheres can absorb and attenuate sound wave energy, and the sound insulation and heat insulation film is good in sound insulation and heat insulation performance. When external noise is transmitted to the glass, the microspheres elastically deform, sound energy is converted into heat energy to be consumed, the sound insulation performance of the glass is remarkably improved, and a quiet in-vehicle environment is created for drivers and passengers.

The present invention provides a film laminate, a smart window including the same, and a method for manufacturing the same, the film laminate comprising a light-dimming laminate and a gap layer comprising a polyvinyl butyral (PVB) film at an end portion of the light-dimming laminate, the thickness of the gap layer being thicker than the thickness of the light-dimming laminate, and the thickness of the gap layer being smaller than the thickness of the light-dimming laminate. A structure for minimizing the pressure applied to a liquid crystal layer when glass is bonded is provided by including a gap layer as a pillar thicker than the light-dimming laminate at an end portion of the light-dimming laminate, thereby preventing liquid crystal speckles without causing displacement due to liquid crystal fluidity.

To provide a film laminate excellent in quality and appearance by minimizing the pressure applied to a liquid crystal layer inside a dimming laminate at the time of joining glass which may occur in a display and suppressing the occurrence of liquid crystal unevenness even after joining the glass.SOLUTION: Provided is a film laminate including a dimming laminate and a surface-protecting layer laminated on at least one of an upper surface and a lower surface of the dimming laminate, wherein the surface-protecting layer is a low-temperature curable polyvinyl butyral (PVB) film cured at a temperature of 90 °C or less, has a thickness of 0. 01mm to 0. 35mm, and has a total area larger than an area of the dimming laminate in contact with the surface-protecting layer.SELECTED DRAWING: Figure 2

A method (200) for marking a vehicle identification number (VIN) (110) in a vehicle (101) is provided. The method (200) involves applying an ultraviolet (UV) reactive lacquer to a laminated glass (100). The laminated glass (100) comprises a lower glass pane (104) with an inner surface (104B) and an upper glass pane (102) which is bonded to the inner surface (104B) of the lower glass pane (104) via an intermediate layer (115) of polyvinyl butyral (PVB). The method (200) further involves forming the VIN (110) on the inner surface (104B) of the lower glass pane (104) using the UV-reactive lacquer. The UV-reactive varnish includes a photoluminescent material that emits visible light when exposed to a UV light source (300), with the intermediate layer encapsulating the UV-reactive varnish in the laminated glass (100).Furthermore, the procedure (200) includes the placement of the VIN (110) in a black printed area of ​​the laminated glass (100).

The invention discloses a preparation method of LED photoelectric glass, and belongs to the technical field of preparation of LED photoelectric glass. A two-section type laminating machine is adopted for production. Two layers of toughened glass and two layers of PVB (Polyvinyl Butyral) film layers are used for protecting the LED chip. The electronic display function of the curtain wall is shown while the requirements of the curtain wall are met. Compared with an existing LED curtain wall manufacturing method, the manufacturing method has the advantages of being short in machining time, low in machining cost, high in yield and the like.

The utility model discloses a film discharge forming die based on a PVB (Polyvinyl Butyral) film process. The film discharge forming die comprises a rack, a first roller, a second roller and a die head which is arranged above the first roller and the second roller and works with the first roller and the second roller are arranged on the rack; wherein the first roller and the rack are fixed, the second roller moves relative to the rack, and a gap formed by the second roller moving relative to the first roller is used for allowing a PVB film in a molten state to pass through; and the transmission adjusting assembly is arranged on the rack. According to the transmission adjusting assembly, the gap between the first roller and the second roller which are in a butt-clamping mode is finely adjusted, so that the thickness of a PVB film which passes through the gap and is in a molten state is adjusted, the cooling and embossing processes are completed at the same time, the working efficiency is high, and meanwhile the transmission adjusting assembly has the structural characteristics, so that the production efficiency is improved. And fine adjustment of the thickness of the PVB film is further ensured.

The invention provides polyvinyl butyral and a preparation method and application thereof, preparation raw materials of the polyvinyl butyral comprise polyvinyl alcohol with the alcoholysis degree of 70%-85% and an aldehyde compound, and the aldehyde compound comprises any one or a combination of at least two of heptanal, nonanal and capraldehyde. The polyvinyl butyral film has the advantages of high light transmittance, low haze, high elasticity and excellent sound insulation effect, and is suitable for application scenes of automobile windshields, building sound insulation glass and the like. The whole technological process is simple, controllable and suitable for large-scale industrial production.

The invention relates to the technical field of automobiles, in particular to an intelligent automobile side window for the temperature of a whole automobile and a method thereof. The side window is used for displaying the temperature in the automobile at the position of the automobile front door side window; the side window is composed of a first connecting layer, a color changing layer, a diaphragm layer and a second connecting layer, the color changing layer and the diaphragm layer are both located between the first connecting layer and the second connecting layer, the color changing layer is located on the side, close to the first connecting layer, of the diaphragm layer, and the first connecting layer and the second connecting layer are both transparent glass; the color-changing layer is thermosensitive thermochromic ink; and the membrane layer is polyvinyl butyral. According to the intelligent automobile side window for the whole automobile temperature and the method thereof, the side window can remind a driver and passengers of the temperature before getting on the automobile and remind whether the driver and the passengers enter the reasonable temperature in the automobile or not in the state of getting close to the automobile, and therefore the driver and the passengers can get on the automobile at the temperature after air conditioner refrigeration; and after the temperature in the automobile reaches a comfortable temperature, the automobile enters the automobile.

The utility model relates to the technical field of starry sky films, and discloses a PVB starry sky film which comprises a printing covering layer, a PVB film layer is arranged at the bottom of the printing covering layer, a pattern is arranged at the bottom of the PVB film layer, an anti-splashing layer is arranged at the bottom of the pattern, and a hardened anti-scratching layer is arranged at the bottom of the anti-splashing layer. According to the starry sky film, the PVB film layer is attached to the skylight glass of the automobile, so that the starry sky film is fixed, the safety performance can be greatly improved through the anti-splashing layer in the starry sky film, fragments are effectively prevented from splashing into the automobile when the glass is broken, the risk of injury to people in the automobile is reduced, and the possibility of secondary injury is reduced; the quality and functions of the automotive trim can be protected, the trim is prevented from being scratched and damaged, a user can drive and ride the automobile more comfortably and more relaxed, powerful guarantee is provided for safety, stability, trim protection and user experience of the automobile in an all-around mode, and the excellent practical value is manifested.

The utility model discloses a PVB (Polyvinyl Butyral) intermediate film light transmittance detection device convenient to use. The PVB intermediate film light transmittance detection device comprises a detection box and a dust removal assembly, according to the PVB intermediate film light transmittance detection device convenient to use, the dust collection heads located at the upper end and the lower end of the pressing frame and the supporting frame in the detection box can conduct dust collection treatment on the upper end face and the lower end face of a PVB intermediate film clamped between the pressing frame and the supporting frame, so that the situation that dust remains at the upper end and the lower end of the PVB intermediate film, and consequently the detection precision of the PVB intermediate film is affected is avoided; a protective pad at the outer end of the dust collection head can block the opening of the detection head and the opening of the light source which are not used in the detection box during dust collection, so that the problem that dust is accumulated in the detection head and the light source to affect the detection precision is solved; and the PVB intermediate film clamped between the supporting frame and the pressing frame can be in different sizes, so that the application range of the detection box is widened.

Disclosed is a film laminate including: an optical laminate; and a gap layer formed at ends of the optical laminate and including a polyvinyl butyral (PVB) film, wherein the thickness of the gap layer is larger than the thickness of the optical laminate. By providing a structure in which the gap layer thicker than the optical laminate is formed in a pillar shape at ends of the optical laminate so as to minimize the pressure applied to a liquid crystal layer during glass bonding, the uneven distribution of liquid crystals due to the fluidity thereof does not occur, and thus the occurrence of liquid crystal mura may be prevented.

Adhesive composition for glass article comprising expansion means and laminated glazing for automobile comprising such a composition The invention relates to an adhesive composition for a glass article comprising poly(vinyl butyral) (PVB) and at least one expansion means. The invention also relates to a laminated glazing for automobile comprising at least two sheets of glass, and as a lamination interlayer, a layer of such an adhesive composition. The invention finally relates to methods for obtaining such a laminated glazing and for disassembling it comprising a step of heating the laminated glazing for automobile to a temperature of from 110°C to 260°C, in particular from 120°C to 250°C and preferably from 180°C to 220°C for a duration of from 0.5 to 10 minutes, in particular from 1 to 5 minutes and preferably from 1.5 to 3 minutes. Figure for abstract: None

The utility model relates to the technical field of architectural decoration, in particular to an architectural decoration energy-saving curtain wall which comprises a main body mechanism and a fixing mechanism, and inner glass, a heat preservation layer, a heat insulation layer, an inner PVB (polyvinyl butyral) film clamping piece, a solar cell panel, an outer PVB film clamping piece and outer glass are sequentially arranged from inside to outside through a mounting frame, a clamping groove, a sealing strip and a cover plate which are arranged on the main body mechanism. And finally, the sealing strip is mounted in a gap between the outer glass and the cover plate, and then the cover plate is clamped on one side of the mounting frame, so that the curtain wall glass is assembled. And the sealing strips are arranged, so that substances such as dust, water and the like are prevented from seeping into the cavity of the frame, and the effects of absorbing wind load and adjusting gaps can be achieved. Through the arrangement of the inner PVB clamping film, the solar cell panel and the outer PVB clamping film, in the using process of the curtain wall, the function of collecting solar energy can be achieved, and therefore the energy saving and emission reduction benefits of the curtain wall are achieved.

The utility model discloses a photoelectric glass module supporting double-sided display and a handrail, the photoelectric glass module comprises a shell, a glass-based circuit board, a PCB (Printed Circuit Board), a first glass-based circuit board, a second glass-based circuit board and a flexible PVB (Polyvinyl Butyral) film, and the first glass-based circuit board and the second glass-based circuit board are integrated through a flexible PVB glue clip gluing sheet. A first LED lamp set is arranged on the first glass-based circuit board, a second LED lamp set is arranged on the second glass-based circuit board, the first LED lamp set and the second LED lamp set are arranged in a staggered mode and are independently controlled through a first driving circuit and a second driving circuit respectively, and the requirement that the double-face display screen displays different contents and does not interfere with each other can be met.

Disclosed are a film laminate, a smart window including the same, and a method for manufacturing the same. The film laminate includes: an optical laminate; and a surface protective layer laminated on at least one of the upper and lower surfaces of the optical laminate, wherein the surface protective layer is a low-temperature curable polyvinyl butyral (PVB) film that is cured at a temperature of 90° C. or lower, has a thickness of 0.01 mm to 0.35 mm, and has a total area larger than the area of the optical laminate that is in contact with the surface protective layer.

The invention discloses a wedge-shaped PVB (Polyvinyl Butyral) film cohesive force testing device, and relates to the technical field of PVB films. The tension component has a first state and a second state; the first fixing assembly and the second fixing assembly are used for limiting displacement of the test piece in the vertical direction in the first state; when the tension assembly is in the first state, the tension assembly applies tension in the direction parallel to the bonding surface of the test piece to the second fixing assembly, the tension assembly rotates by 90 degrees to be switched to the second state, and the tension assembly applies tension in the direction perpendicular to the bonding surface of the test piece to the second fixing assembly; according to the technical scheme, the bonding force detection in the parallel direction and the vertical direction of the bonding surface of the test piece can be completed through one-time clamping, a clamp does not need to be replaced, the situation that long-time recovery needs to be consumed after simulation environment parameters are damaged is avoided, and the detection efficiency is greatly improved.

This utility model relates to the field of laminated glass and discloses a colored laminated glass, comprising two glass bodies, two fixing plates, and two limiting plates. Limiting grooves are formed on the upper and lower sides near the middle of the two fixing plates, and placement grooves are formed at the upper and lower edges of the two fixing plates. A placement block is fixedly disposed at the middle position of one of the opposite sides of the two limiting plates, and limiting blocks are fixedly disposed at both ends of one of the opposite sides of the two limiting plates. A PVB film is disposed between the two glass bodies. Each glass body includes a hydrophobic film layer, with a glass layer disposed within the inner end of the hydrophobic film layer, and an explosion-proof film layer disposed within the inner end of the glass layer. The hydrophobic film layer is made of siloxane coating, and the explosion-proof film layer is made of polyvinyl butyral. In this utility model, the hydrophobic film layer on the surface of the glass body can effectively prevent moisture adhesion, and the explosion-proof film layer can enhance the impact resistance and explosion resistance of the glass.