CN110668711B - Preparation process of ultra-thick interlayer Low-E glass and Low-E glass - Google Patents

Abstract

The invention discloses a preparation process of ultra-thick interlayer Low-E glass and Low-E glass, which comprise the following steps: firstly, cutting and edging a glass sheet to obtain a first glass substrate, a second glass substrate and a third glass substrate Then heat treatment separately; coating a surface of the second glass substrate with a composite film layer; cleaning and drying the first glass substrate and the second glass substrate; covering the first glass substrate and the second glass substrate with an SGP film Bonding sheet; using constant temperature convection process, pre-pressing the first glass substrate and the second glass substrate after the sheets; keeping the pre-pressed first glass substrate and the second glass substrate thermal insulation; the first glass substrate and the second glass substrate The glass substrate and the third glass substrate are arranged at intervals to form a hollow layer. The preparation process designed by the invention adopts the constant temperature convection rolling process, so that the SGP film and the glass substrate are heated evenly, the production quality is improved, the production cost is reduced, and the production efficiency is improved.

Description

Preparation process of ultra-thick interlayer Low-E glass and Low-E glass

technical field

The invention relates to the field of laminated glass production, in particular to a preparation process of ultra-thick laminated Low-E glass and the Low-E glass.

Background technique

Coated glass has good thermal insulation performance, especially low-emissivity coated glass can effectively inhibit the transmission of infrared light, reduce the heat exchange on both sides of the glass, and has excellent energy-saving performance and optical performance. Laminated glass is a tough and transparent flexible material because the middle layer, especially the SGP film itself. When the laminated glass is impacted and broken, the fragments are still firmly adhered to the interlayer, and the residual strength of SGP can still bear a certain amount of load. Therefore, SGP laminated glass It has excellent anti-collision performance, anti-theft and anti-riot performance and anti-disaster performance. SGP itself is colorless and translucent, and it is not easy to yellow. The combination of coating and SGP interlayer can achieve top-level crystal clear optical effect. Therefore, the composite processing of SGP interlayer and coating makes the glass show more excellent performance: it has excellent safety, and at the same time, it has comfort and coating color beauty, which is favored by architectural designers.

Due to the bending and warping of the glass itself, especially after tempering, it will be more pronounced. At the same time, due to the limitation of the height of the coating chamber, it is impossible to produce 10/8 (10 is the thickness of the first glass, 8 is the same as the first glass. The thickness of the second piece of glass to be laminated by lamination is greater than the thickness of the second piece of glass, so the conventional process of laminating first and then coating can not meet the design requirements for thicker, larger and safer glass.

Another processing method used in the prior art is to coat first, then temper, and then interlayer to obtain Low-E laminated glass. However, this process requires the film to have the characteristics of high temperature resistance, and there are fewer varieties. Radiation characteristics lead to uneven heating of glass during tempering, resulting in large waveforms and edge warping, resulting in poor flatness. In addition, due to the low radiation characteristics of Low-E film during interlayer, the SGP film is not uniformly heated, resulting in the production of interlayers. The glass has a large area of bubble defects. The existing technology also adopts the process of first tempering, then coating, and then vacuuming, but vacuuming requires a lot of manpower and material costs, and the production efficiency is extremely low, which cannot meet mass production, and it is difficult to meet customer demand for goods.

SUMMARY OF THE INVENTION

In order to solve the problems existing in the prior art, the present invention provides a preparation process of the ultra-thick interlayer Low-E glass and the Low-E glass, so as to produce the laminated glass with good flatness and uniformity, and improve the production quality, The technical solution is as follows:

The invention provides a preparation process of ultra-thick interlayer Low-E glass, which comprises the following steps:

S1: First, the selected glass sheets are subjected to cutting processing and edging processing to obtain a first glass substrate, a second glass substrate and a third glass substrate;

S2: respectively heat-treating the first glass substrate, the second glass substrate and the third glass substrate in step S1 by a physical toughening method;

S3: Place the second glass substrate heat-treated in step S2 in a vacuum magnetron sputtering device, and coat a surface of the second glass substrate with a composite film layer, wherein the composite film layer is single silver Low-E, double silver Low-E or Triple Silver Low-E;

S4, cleaning and drying the first glass substrate after heat treatment in step S2 and the second glass substrate after coating in step S3;

S5, covering the SGP film between the first glass substrate and the second glass substrate after drying in the step S4, so as to bond the first glass substrate and the second glass substrate;

S6, adopting a constant temperature convection process to pre-press the first glass substrate and the second glass substrate after lamination in step S5;

S7, thermally insulating the first glass substrate and the second glass substrate after pre-pressing in step S6;

S8, the first glass substrate, the second glass substrate and the third glass substrate after the heat preservation in the step S7 are arranged at intervals to form a hollow layer to obtain an insulating glass.

Further, after step S3, a protective layer is firstly coated on the surface of the second glass substrate coated with the composite film layer, and the thickness of the protective layer is in the range of 0.03-0.05mm, and then the first glass substrate and the second glass substrate are coated with a protective layer. wash and dry, or

After step S6, a protective layer is attached to the surface of the second glass substrate after pre-pressing and plated with a composite film layer, and the thickness of the protective layer is in the range of 0.03-0.05 mm, and then heat preservation is performed.

Further, the protective layer is a PVC film.

Further, in step S8, the PVC film on the second glass substrate after the heat preservation in step S7 is removed, and a third glass substrate is arranged on the side of the second glass substrate away from the first glass substrate. The substrate and the third glass substrate are arranged at intervals to form a hollow layer, and an aluminum frame and a sealant are arranged in the hollow layer.

Further, in step S2, the heat treatment process is as follows: the furnace temperature is controlled at 685-710° C., the first glass substrate, the second glass substrate and the third glass substrate are uniformly heated and controlled at 610-630° C. Rapid and uniform cooling within the set time threshold.

Further, in step S3, each film layer in the composite film layer is sequentially plated on a surface of the second glass substrate; in step S4, the first glass substrate and the second layer of the composite film layer in step 3 are plated The glass substrate is cleaned with deionized pure water; in step S5, the thickness range of the SGP film is set to 0.76-2.28 mm.

Further, in step S6, the constant temperature convection process is as follows: put the first glass substrate and the second glass substrate after lamination in step S5 into a convection rolling furnace for convection heating, and the convection rolling furnace includes multiple A heating zone and a rolling zone are arranged in sequence, the temperature range of the plurality of heating zones is set to 130-160°C, and the glass substrate travel speed is set to 0.8-1.6m/min. The glass substrate is heated by convection and then rolled by pressing rollers. The rolling pressure is set to 6-7bar. The distance between the two pressing rollers is 3-5mm smaller than the total thickness of the first glass substrate and the second glass substrate. The rolling temperature is set at 130-160°C, and the roll is removed within the preset time threshold range, and the temperature of the oven is controlled at 50-60°C.

Further, in step S7, the first glass substrate and the second glass substrate pre-pressed in step S6 are put into the autoclave for heat preservation, the temperature range of heat preservation is set to 130-140°C, and the range of holding pressure is set to 12-13 bar , the heat preservation time is set to 90-120min, and after the heat preservation is completed, it is cooled to less than 45 ℃ and then exhausted.

The present invention also provides an ultra-thick interlayer Low-E glass, which includes one or more coated glass components, and the coated glass components include a second glass substrate and a first glass substrate that are oppositely disposed up and down, and the second glass substrate An SGP film is arranged between the first glass substrate and the second glass substrate, and a surface of the second glass substrate away from the first glass substrate is coated with a composite film layer, and the composite film layer is single silver Low-E, double silver Low-E or Three silver Low-E; every two adjacent coated glass components are arranged at intervals to form a hollow layer.

The present invention further provides an ultra-thick interlayer Low-E glass, which includes one or more coated glass components, wherein the coated glass components include a second glass substrate and a first glass substrate disposed up and down opposite to each other, the second glass substrate An SGP film is arranged between the first glass substrate and the second glass substrate, and a surface of the second glass substrate away from the first glass substrate is coated with a composite film layer, and the composite film layer is single silver Low-E, double silver Low-E or triple silver Low-E; a third glass substrate is arranged above the side of the second glass substrate away from the first glass substrate, and the second glass substrate and the third glass substrate are arranged at intervals to form a hollow layer.

The beneficial effects brought by the technical scheme provided by the invention are as follows:

a. The preparation process of the ultra-thick interlayer Low-E glass designed by the present invention adopts the production process of first tempering, then coating, and then interlayering. The composite film layer does not need to undergo high-temperature heating of tempering. When designing the film structure and selecting coating materials, only It is necessary to consider meeting the requirements of the project's appearance color and photothermal performance. The manufactured Low-E film has various colors, good uniformity, excellent optical performance and good glass flatness;

b. In the preparation process of the ultra-thick interlayer Low-E glass designed by the present invention, the thickness of the glass substrate is not limited by the height of the coating cavity of the vacuum magnetron sputtering device, so that the thickness of the produced interlayer coated glass is higher than that of the conventional interlayer first and then the coating The thickness of the glass produced is more than doubled, which greatly improves the rigidity, wind pressure resistance, shock resistance and other properties of the glass;

c. The preparation process of the ultra-thick interlayer Low-E glass designed by the present invention adopts the rolling process of constant temperature convection, so that the SGP film and the glass substrate are fully heated and evenly heated, and the production quality is improved; Reduce production costs and improve production efficiency.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the first flow chart of the preparation process of the ultra-thick interlayer Low-E glass provided by the embodiment of the present invention;

2 is a second flow chart of the preparation process of the ultra-thick interlayer Low-E glass provided by the embodiment of the present invention;

3 is a side view of an ultra-thick interlayer Low-E glass prepared by a preparation process of ultra-thick interlayer Low-E glass according to an embodiment of the present invention;

4 is a side view of another ultra-thick interlayer Low-E glass prepared by the preparation process of the ultra-thick interlayer Low-E glass provided by the embodiment of the present invention.

Wherein, the reference signs include: 1-first glass substrate, 2-second glass substrate, 3-third glass substrate, 4-SGP film, 5-composite film layer, 6-sealant, 7-aluminum frame.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, apparatus, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

In one embodiment of the present invention, a preparation process of ultra-thick laminated Low-E glass is provided, mainly producing 10/10 and above coated laminated glass. The specific structure is shown in FIG. 1, which includes the following steps:

S1: Provide a glass original sheet, and perform cutting and edging processing on the glass original sheet: cut into a first glass substrate, a second glass substrate and a third glass substrate according to the required type, thickness and size, and then Edge grinding, manual chamfering, machine rough grinding or fine grinding of the edges of the two glass substrates as required; the thickness range of the first glass substrate, the second glass substrate and the third glass substrate are all set to 10-22mm (mainly There are 10, 12, 15, 19 and 22mm); the first glass substrate, the second glass substrate and the third glass substrate are ordinary ultra-white or white glass products;

S2: The first glass substrate, the second glass substrate and the third glass substrate in the step S1 are respectively heat treated by the physical tempering method. In the step S2, the heat treatment process is as follows: the furnace temperature is controlled at 685-710°C, preferably 710°C ℃, the first glass substrate, the second glass substrate and the third glass substrate are uniformly heated and controlled at 610-630℃, preferably 625℃, and then rapidly and uniformly cooled by different wind pressures within the preset time threshold range, Make the first glass substrate and the second glass substrate have a certain strength, which can be semi-tempered or fully tempered;

S3: Place the second glass substrate heat-treated in step S2 in a vacuum magnetron sputtering device, and coat a surface of the second glass substrate with a composite film layer, wherein the composite film layer is single silver Low-E, double silver Low-E or triple-silver Low-E can meet the design requirements of different parameters and colors. Single-silver Low-E, double-silver Low-E or triple-silver Low-E include multiple layers. Specifically, the second One surface of the glass substrate is sequentially coated with each film layer of single silver Low-E, double silver Low-E or triple silver Low-E;

S4, cleaning the first glass substrate after heat treatment in step S2 and the second glass substrate after coating in step S3, and drying, using deionized pure water for cleaning, and using a special cleaning machine, the cleaning time is short and the cleaning effect is good;

S5, covering the first glass substrate and the second glass substrate after drying in step S4 with SGP film (the full name of SGP is ionic intermediate film (Sentry GlasPlus), which is a high-performance interlayer material), so as to protect the first glass substrate The substrate and the second glass substrate are bonded together (the surface of the second glass substrate with the coating is far away from the first glass substrate, and the side of the second glass substrate and the first glass substrate is a tin surface), the thickness of the SGP film The range is set to 0.76-2.28mm. SGP film is a common interlayer film for laminated glass. It is colorless and translucent, and not easy to yellow. ;

S6, adopt the process of constant temperature convection to pre-press the first glass substrate and the second glass substrate after the lamination in step S5, specifically: put the first glass substrate and the second glass substrate after lamination in step S5 into the convection Convective heating is performed in a rolling furnace, the convection rolling furnace includes a plurality of heating zones and rolling zones arranged in sequence, and the number of heating zones may preferably be three, and each heating zone includes multiple sets of convection bellows, preferably 8 sets. Two sets of convection bellows are respectively arranged on the upper left and right sides of the first glass substrate and the second glass substrate, and two sets of convection bellows are arranged on the left and right sides of the lower part. Each convection air box corresponds to a 1.1KW fan, and the speed is controlled at 1000-1400r/min. There are several heating wires in front of the fan. The fan is used to transmit the heat generated by the heating wire to the glass. Each heating wire is 3000W, It is used to generate heat source; the rotational speed of the fans in multiple heating zones is set the same; the hot air is blown onto the glass surface by the convection fan, so that gas convection is formed in the upper and lower spaces of the glass substrate, and the glass and SGP film (Low-E film) are quickly and evenly heated. Due to the low radiation characteristics of the layer, the use of radiation heating will cause the radiation heat to be blocked by the Low-E film layer, and it is difficult for the SGP film to be fully heated and fully bonded to the glass, and the bonding effect is poor). After setting the temperature of the three heating zones and the moving speed of the glass substrate (travel speed is set to 0.8-1.6m/min), the controller automatically adjusts the fan speed and heating temperature according to the temperature, and the speed is controlled at 1000-1400r /min, the heat generated by the heating wire is evenly distributed to the heated first glass substrate and the second glass substrate through the tuyere of the convection bellows.

The temperature of the three heating zones of the convection rolling furnace is set to be constant and the same, that is, the temperature of the upper part and the lower part of the whole of the first glass substrate and the second glass substrate are set to be the same, and the temperature range is set to 130-160 ° C to To avoid signal interference caused by the temperature deviation of the three heating zones, the heat generated between the convection bellows is inconsistent, resulting in uneven heating of the product. The first glass substrate and the second glass substrate are heated by convection and then rolled by a pressure roller in the rolling area. The pressure roller is an air pressure rubber roller. There are pressure rollers on the upper and lower sides of the glass substrate, and the rolling pressure is set to 6-7 bar. , the rolling temperature is set to 130-160 ℃, the glass substrate travel speed is set to 0.8-1.6m/min, the distance between the two pressing rollers is based on the total thickness of the overall laminated glass after convection heating (the total thickness refers to the first glass substrate , the sum of the thickness of the SGP film between the second glass substrate and the second glass substrate), that is, the distance between the two pressing rollers is 3-5mm smaller than the total thickness of the overall laminated glass, such as the production of 10mm and 10mm coated SGP interlayer When the product is produced, the pressure is set to 6.5bar, the distance between the two rollers is adjusted to 17-18mm, and the glass substrate travel speed (transmission speed) is set to 0.8-1.6m/min. In the heating zone and the rolling zone, the glass substrate travel speed ( Conveying speed) is the same, if the glass substrate travel speed in the heating zone is 1m/min, then the glass substrate travel speed in the rolling zone is also 1m/min. Then, it is removed within the preset time threshold range, and the temperature of the oven is controlled to be 50-60°C.

The constant temperature convection rolling process is adopted to avoid heating instability caused by the temperature difference of the convection rolling furnace, and the SGP film and the glass substrate can be fully heated evenly without large-area bubbles; The glass substrate of the film) can not be heated evenly by the glass and SGP due to the isolation of radiant heat, which improves the production quality.

S7. Insulate the first glass substrate and the second glass substrate after prepressing in step S6. The specific implementation of the thermal preservation is as follows: put the first glass substrate and the second glass substrate after prepressing in step S6 into an autoclave Insulation, the temperature range of the insulation is set to 130-140°C, preferably 135-138°C; the pressure range of the holding pressure is set to 12-13bar, preferably 12.5-13bar; the insulation time is set to 90-120min, the insulation (in the preset time threshold range) After cooling to below 45°C, exhaust the gas;

S8 , the first glass substrate, the second glass substrate and the third glass substrate after the heat preservation in the step S7 are spaced apart to form a hollow layer to obtain an insulating glass.

Further, in order to protect the composite film layer on the second glass substrate, after step S3 and before step S4, a protective layer is first plated on the surface of the second glass substrate with the composite film layer, as shown in FIG. 1, the protective layer It is preferably a PVC film, and the thickness of the PVC film is in the range of 0.03-0.05 mm, and then the first glass substrate and the second glass substrate are cleaned and dried. Use 0.03-0.05mm thick PVC film to protect the composite film layer (Low-E surface) to prevent the Low-E film from being oxidized or scratched. Or, after step S6, the second glass substrate after pre-pressing is provided with a surface-adhering protective layer coated with a composite film layer, as shown in FIG. 2 , the protective layer is preferably a PVC film, and the thickness of the PVC film is The range is 0.03-0.05mm.

In the embodiment of the present invention, in step S8, specifically, the PVC film on the second glass substrate after the heat preservation in step S7 is removed, and a third glass substrate is arranged above the side of the second glass substrate away from the first glass substrate. A glass substrate, the second glass substrate and the third glass substrate are arranged at intervals to form a hollow layer, and an aluminum frame and a sealant are arranged in the hollow layer.

In the traditional preparation process, the film is first coated and then tempered. Due to the high tempering temperature, the film to be coated (the film has a thermal insulation effect) has high requirements. The film must have high temperature resistance and oxidation resistance. The film will be damaged to some extent and affect its thermal insulation performance. However, using the preparation process provided by the present application is to first toughen and then coat the film, which has low requirements on the film to be plated, and the film will not be subjected to high temperature, and the thermal insulation performance of the film will not be affected. Therefore, the film structure is designed and the coating material is selected. It is only necessary to consider meeting the requirements of the project's appearance color and light and heat performance.

In addition, in the traditional preparation process, the method of interlayer first and then coating is also adopted, and the two laminated glasses are put into the coating chamber, and the coating chamber is limited by the height and cannot put more layers of glass. However, using the preparation process provided by this application is to first temper and then coat, and only put a piece of glass that needs to be coated into the coating chamber for coating (for example, the current thicker glass is 22mm and 19mm, and the thicker glass can be placed in step S3 respectively. The vacuum magnetron sputtering device in the middle is coated with a composite film layer), and then the coated glass is interlayered with other glasses. Therefore, the thickness of the laminated coated glass produced by the preparation process provided by the present application is more conventional than the conventional first interlayer and then coated production. The thickness of the glass produced is more than doubled.

Example 1

The substrate glass of 19mm is selected to produce 19mm and 19mm coated SGP interlayer product glass. The specific production method is as follows:

S1: First, the selected 19mm glass sheet is cut and edged to obtain a first glass substrate, a second glass substrate and a third glass substrate;

S2: Heat treatment of the first glass substrate, the second glass substrate and the third glass substrate in step S1 by the physical tempering method, the upper furnace temperature is set to 685°C, the lower furnace temperature is set to 710°C, and the glass is uniformly heated to 625°C After ℃, it is cooled to 460 ℃ by the wind pressure of 80Pa at a cooling rate of 8 ℃/s, and then continues to cool to room temperature by the wind pressure of 600Pa;

S3: Place the second glass substrate heat-treated in step S2 in a vacuum magnetron sputtering device, and coat a surface of the second glass substrate with a composite film layer, wherein the composite film layer is single silver Low-E, double silver Low-E or Triple Silver Low-E;

S4, cleaning and drying the first glass substrate after heat treatment in step S2 and the second glass substrate after coating in step S3;

S5, covering the first glass substrate and the second glass substrate after drying in the step S4 with an SGP film with a thickness of 2.28 mm, so as to bond the first glass substrate and the second glass substrate;

S6. Put the first glass substrate and the second glass substrate after the lamination in step S5 into a convection rolling furnace for convection heating. There are three heating zones in the convection rolling furnace, and the temperature ranges of the three heating zones are all set to At 130°C, the glass substrate travel speed is set to 0.9m/min. After the first glass substrate and the second glass substrate are convectively heated, they are rolled by pressing rollers. The rolling pressure is set to 6.5bar, between the two pressing rollers. The spacing of the glass is 35mm, the glass rolling temperature is 130°C, and the glass is removed within the preset time threshold range, and the release temperature is controlled at 50-55°C. The surface is fitted with a protective layer of 0.03mm;

S7, put the first glass substrate and the second glass substrate after the pre-pressing in step S6 into the autoclave for heat preservation, the temperature range of the heat preservation is set to 140°C, the range of the holding pressure is set to 13bar, the heat preservation time is set to 120min, and the heat preservation is completed. After cooling to below 45℃, exhaust;

S8, remove the PVC film on the second glass substrate after the heat preservation in step S7, and set a third glass substrate on the side of the second glass substrate away from the first glass substrate, the second glass substrate and the third glass substrate They are arranged at intervals to form a hollow layer, and the hollow layer is provided with an aluminum frame and a sealant, and finally an insulating glass is obtained.

Example 2

The substrate glass of 15mm is selected to prepare and produce the coated SGP interlayer product glass of 15mm and 15mm. The specific production method is as follows:

S1: First, the selected 15mm glass sheet is cut and edged to obtain a first glass substrate, a second glass substrate and a third glass substrate;

S2: heat-treating the first glass substrate, the second glass substrate and the third glass substrate in step S1 respectively by the physical tempering method, specifically: the upper furnace temperature is set to 685°C, the lower furnace temperature is set to 710°C, and the glass is uniform After heating to 620°C, it is cooled to 450°C by a wind pressure of 150Pa at a cooling rate of 10°C/s, and then cooled to room temperature by a wind pressure of 600Pa;

S3: Place the second glass substrate heat-treated in step S2 in a vacuum magnetron sputtering device, and coat a surface of the second glass substrate with a composite film layer, wherein the composite film layer is single silver Low-E, double silver Low-E or Triple Silver Low-E;

S4, first attaching a protective layer to the surface of the second glass substrate coated with the composite film layer, and then cleaning and drying the first glass substrate and the second glass substrate;

S5, covering the first glass substrate and the second glass substrate after drying in the step S4 with an SGP film with a thickness of 2.28 mm, so as to bond the first glass substrate and the second glass substrate;

S6. Put the first glass substrate and the second glass substrate after the lamination in step S5 into a convection rolling furnace for convection heating. There are three heating zones in the convection rolling furnace, and the temperature ranges of the three heating zones are all set to At 138°C, the glass substrate travel speed is set to 1.0m/min. After the first glass substrate and the second glass substrate are convectively heated, they are rolled by pressing rollers. The rolling pressure is set to 6.5 bar, between the two pressing rollers. The spacing of the glass is 27mm, the glass rolling temperature is 138°C, and the glass is removed within the preset time threshold range, and the temperature of the furnace is controlled at 50-58°C;

S7, put the first glass substrate and the second glass substrate after the pre-pressing in step S6 into the autoclave for heat preservation, the heat preservation temperature range is set to 138°C, the pressure holding pressure range is set to 12.5bar, the heat preservation time is set to 120min, and the heat preservation time is set to 120min. After cooling to below 45℃, exhaust;

S8, remove the PVC film on the second glass substrate after the heat preservation in step S7, and set a third glass substrate on the side of the second glass substrate away from the first glass substrate, the second glass substrate and the third glass substrate They are arranged at intervals to form a hollow layer, and the hollow layer is provided with an aluminum frame and a sealant, and finally an insulating glass is obtained.

In another embodiment of the present invention, an ultra-thick interlayer Low-E glass is also provided, which is obtained according to the above-mentioned preparation process. As shown in FIG. 4 , the ultra-thick interlayer Low-E glass includes one or more A coated glass assembly, the coated glass assembly includes a second glass substrate 2 and a first glass substrate 1 that are arranged opposite to each other, an SGP film 4 is arranged between the second glass substrate 2 and the first glass substrate 1, and the first glass substrate 2 A surface of the two glass substrates 2 away from the first glass substrate 1 is coated with a composite film layer 5, and the composite film layer 5 is single silver Low-E, double silver Low-E or triple silver Low-E; The coated glass components are arranged at intervals to form a hollow layer; an aluminum frame 7 and a sealant 6 are arranged between every two adjacent coated glass components to form a hollow structure. In FIG. 4 , the Low-E surfaces of the two second glass substrates 2 both face the hollow layer.

In yet another embodiment of the present invention, an ultra-thick interlayer Low-E glass is provided, as shown in FIG. 3 , which is obtained according to the above-mentioned preparation process, and the ultra-thick interlayer Low-E glass includes one or more A coated glass assembly, the coated glass assembly includes a second glass substrate 2 and a first glass substrate 1 that are arranged opposite each other up and down, an SGP film 4 is arranged between the second glass substrate 2 and the first glass substrate 1, and the second glass substrate 2 and the first glass substrate 1 A surface of the substrate 2 away from the first glass substrate 1 is coated with a composite film layer 5, the composite film layer 5 is single silver Low-E, double silver Low-E or triple silver Low-E; on the second glass substrate 2 away from A third glass substrate 3 is arranged above one side of the first glass substrate 1 , the composite film layer 5 is close to the third glass substrate 3 , and an aluminum frame 7 and a sealant are arranged between the second glass substrate 2 and the third glass substrate 3 6, to form a hollow structure.

The performance test and comparison of the laminated glass prepared by the preparation process provided by the present invention and the laminated glass prepared by the traditional preparation process are carried out.

Table 1 Comparison table of performance test data of laminated glass with different thicknesses prepared by two preparation processes

It can be seen from the above Table 1 that the thickness of the laminated glass prepared by the preparation process provided by the present invention is increased by more than 1 times, and the rigidity is significantly improved. In addition, the wind pressure resistance, shock resistance and other properties of the glass are also improved; in addition, the ability to process ultra-thick laminated glass The performance of the laminated glass prepared according to the preparation process provided by the present invention reaches the standard in all aspects.

Table 2 Comparison table of performance test data of laminated glass with the same thickness prepared by two preparation processes

As can be seen from Table 2, when the coated laminated glass of the same thickness is prepared, compared with the non-coated laminated glass prepared by the traditional preparation process, the coated laminated glass prepared by the preparation process provided by the present invention can increase the running speed in the rolling furnace. , The speed block can improve the production efficiency. The traditional preparation process cannot produce 10/10 coated laminated glass, only the thickest 10/8 coated laminated glass can be produced. At the same time, no vacuuming is required, which solves the problem that the traditional preparation process (vacuuming) is expensive to produce coated SGP laminated glass and cannot be mass-produced, thereby saving costs.

The preparation process of the ultra-thick interlayer Low-E glass provided by the present invention adopts the production process of first tempering, then coating, and then interlayering, and the composite film layer (Low-E film) does not need to undergo high-temperature heating of tempering. When coating materials, it is only necessary to consider the appearance color and photothermal performance requirements of the project. The manufactured Low-E films have various colors, good uniformity, excellent optical performance and good glass flatness. Such products can be used in high-end glass curtain wall projects; In addition, the thickness of the glass substrate is not limited by the height of the coating cavity of the vacuum magnetron sputtering device, so that the thickness of the produced laminated glass is more than double that of the conventional glass produced by interlayering and then coating, which greatly improves the rigidity and rigidity of the glass. Wind pressure resistance, shock resistance and other properties; at the same time, the constant temperature convection rolling process is adopted to avoid the situation that the heating heat of the conventional radiant furnace is isolated by the Low-E film layer and cannot make the SGP film evenly heated. Convective heating makes the SGP film and the glass substrate fully heated and evenly Improve production quality and production efficiency; can meet mass production without vacuuming, greatly reduce production costs and improve production efficiency.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection of the present invention. within the range.

Claims (9)

1. the preparation process of ultra-thick interlayer Low-E glass, is characterized in that, comprises the steps: S1: First, the selected glass sheets are subjected to cutting processing and edging processing to obtain a first glass substrate, a second glass substrate and a third glass substrate; S2: respectively heat-treating the first glass substrate, the second glass substrate and the third glass substrate in step S1 by a physical tempering method; S3: Place the second glass substrate heat-treated in step S2 in a vacuum magnetron sputtering device, and coat a surface of the second glass substrate with a composite film layer, wherein the composite film layer is single silver Low-E, double silver Low-E or Triple Silver Low-E; S4, cleaning and drying the first glass substrate after heat treatment in step S2 and the second glass substrate after coating in step S3; S5, covering the SGP film between the first glass substrate and the second glass substrate after drying in the step S4, so as to bond the first glass substrate and the second glass substrate; S6, adopting a constant temperature convection process to pre-press the first glass substrate and the second glass substrate after the lamination in step S5; S7, thermally insulating the first glass substrate and the second glass substrate after pre-pressing in step S6; S8, the first glass substrate, the second glass substrate and the third glass substrate after the heat preservation in the step S7 are spaced to form a hollow layer to obtain an insulating glass In step S6, the constant temperature convection process is as follows: the first glass substrate and the second glass substrate after the lamination in step S5 are put into a convection rolling furnace for convection heating, and the convection rolling furnace includes a plurality of sequentially arranged The heating zone and the rolling zone, the temperature ranges of the plurality of heating zones are all set to 130-160°C, and the glass substrate traveling speed is all set to 0.8-1.6m/min. After convection heating, it is rolled by pressing rollers. The rolling pressure is set to 6-7 bar. The distance between the two pressing rollers is 3-5 mm smaller than the total thickness of the first glass substrate and the second glass substrate. The pressing temperature was set at 130-160°C, and the temperature was removed within the preset time threshold range, and the temperature of the oven was controlled at 50-60°C. 2. The preparation process of ultra-thick interlayer Low-E glass according to claim 1, wherein after step S3, a protective layer is first plated on the surface of the second glass substrate with a composite film layer, and the protective layer is The thickness of the layer is in the range of 0.03-0.05mm, and then the first glass substrate and the second glass substrate are cleaned and dried, or After step S6, a protective layer is attached to the surface of the second glass substrate after pre-pressing and plated with the composite film layer, and the thickness of the protective layer is in the range of 0.03-0.05 mm. 3 . The preparation process of ultra-thick interlayer Low-E glass according to claim 2 , wherein the protective layer is a PVC film. 4 . 4. The preparation process of ultra-thick interlayer Low-E glass according to claim 2, characterized in that, in step S8, the PVC film on the second glass substrate after the heat preservation in step S7 is removed, and the second glass A third glass substrate is arranged above the side of the substrate away from the first glass substrate, the second glass substrate and the third glass substrate are arranged at intervals to form a hollow layer, and an aluminum frame and a sealant are arranged in the hollow layer. 5. The preparation process of ultra-thick interlayer Low-E glass according to claim 1, characterized in that, in step S2, the process of heat treatment is as follows: the furnace temperature is controlled at 685-710 ° C, and the first glass The second glass substrate and the third glass substrate are uniformly heated and controlled at 610-630° C., and then rapidly and uniformly cooled within a preset time threshold range. 6. The preparation process of ultra-thick interlayer Low-E glass according to claim 1, wherein in step S3, each film layer in the composite film layer is sequentially plated on a surface of the second glass substrate; In step S4, the first glass substrate and the second glass substrate coated with the composite film layer in step 3 are cleaned with deionized pure water; in step S5, the thickness range of the SGP film is set to 0.76-2.28mm. 7. The preparation process of ultra-thick interlayer Low-E glass according to claim 1, wherein in step S7, the first glass substrate and the second glass substrate pre-pressed in step S6 are put into an autoclave For heat preservation, set the temperature range of heat preservation to 130-140°C, the range of holding pressure to 12-13bar, and the time of heat preservation to be set to 90-120min. 8. An ultra-thick interlayer Low-E glass, characterized in that, obtained according to the preparation process of any one of claims 1-7, the ultra-thick interlayer Low-E glass comprises one or more coated glass components , the coated glass assembly comprises a second glass substrate (2) and a first glass substrate (1) that are oppositely arranged up and down, and an SGP film is arranged between the second glass substrate (2) and the first glass substrate (1) (4), a surface of the second glass substrate (2) away from the first glass substrate (1) is coated with a composite film layer (5), the composite film layer (5) is single silver Low-E, double silver Low-E or triple silver Low-E; every two adjacent coated glass components are arranged at intervals to form a hollow layer. 9. An ultra-thick interlayer Low-E glass, characterized in that, obtained according to the preparation process of any one of claims 1-7, the ultra-thick interlayer Low-E glass comprises one or more coated glass components , the coated glass assembly comprises a second glass substrate (2) and a first glass substrate (1) that are oppositely arranged up and down, and an SGP film is arranged between the second glass substrate (2) and the first glass substrate (1) (4), a surface of the second glass substrate (2) away from the first glass substrate (1) is coated with a composite film layer (5), the composite film layer (5) is single silver Low-E, double silver Low- E or triple silver Low-E; a third glass substrate (3) is provided above the side of the second glass substrate (2) away from the first glass substrate (1), the second glass substrate (2) and the third glass substrate (2) The substrates (3) are arranged at intervals to form hollow layers.

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