CN114734711A - Preparation method of laminated glass - Google Patents
Preparation method of laminated glass Download PDFInfo
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- CN114734711A CN114734711A CN202210176171.4A CN202210176171A CN114734711A CN 114734711 A CN114734711 A CN 114734711A CN 202210176171 A CN202210176171 A CN 202210176171A CN 114734711 A CN114734711 A CN 114734711A
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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
- 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
- B32B17/10005—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 laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10816—Making laminated safety glass or glazing; Apparatus therefor by pressing
- B32B17/10871—Making laminated safety glass or glazing; Apparatus therefor by pressing in combination with particular heat treatment
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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
- 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
- B32B17/10005—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 laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
- B32B17/10935—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin as a preformed layer, e.g. formed by extrusion
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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
- 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
- B32B17/10005—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 laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10963—Making laminated safety glass or glazing; Apparatus therefor specially adapted for repairing the layered products
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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
- 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
- B32B17/10005—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 laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10981—Pre-treatment of the layers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/22—Glazing, e.g. vaccum glazing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
The invention relates to a preparation method of laminated glass, which comprises the following steps: s1, cutting to obtain a first glass substrate and a second glass substrate; s2, performing heat treatment on the first glass substrate and the second glass substrate respectively; s3, arranging a glue layer re-laminating sheet between the first glass substrate and the second glass substrate, wherein the heat shrinkage rate of the glue layer is less than or equal to 1.5%; s4, glue repairing treatment is carried out on the first glass substrate and the second glass substrate after the sheet combination: removing the adhesive layers which exceed the four sides of the glass substrate, and trimming the adhesive layers at the four sides of the glass substrate and the edge of the glass substrate; s5, prepressing; and S6, moving the pre-pressed first glass substrate and second glass substrate into an autoclave for final pressing to obtain the laminated glass. The preparation method provided by the invention only relates to one-time glue repair, simplifies the process flow, reduces the production time and improves the production efficiency; the prepared laminated glass has no corner breakage and peeling, avoids discharging and adhesive tape waste during film coating, and improves the glass quality.
Description
Technical Field
The invention belongs to the technical field of laminated glass, and particularly relates to a preparation method of laminated glass.
Background
The laminated glass is formed by clamping a flexible middle layer between two or more pieces of glass and processing the flexible middle layer at high temperature and high pressure, and the middle layer has good toughness, strong cohesiveness and good penetration resistance, so that the laminated glass has good impact resistance. Even if the laminated glass is broken by impact, the fragments are still firmly adhered to the interlayer and do not splash, so the laminated glass has the safety protection effect on human bodies and properties, and simultaneously, the interlayer (particularly PVB film) is a tough and transparent flexible material and can absorb ultraviolet rays and sound waves, so the laminated glass has the ultraviolet resistance and the sound insulation performance, and is widely applied to the fields of automobiles and buildings. Due to the excellent performance of the laminated glass, the application proportion of the laminated glass in the architectural glass market is gradually increased along with the coming of the policy of local government on the building curtain wall related to the use of safety glass.
The most widely used method for producing laminated glass at present is an autoclave method, which is widely used in industrial production due to mature technology and large capacity. However, in the prior art, in order to prevent the problem of glue shrinkage, the amount of the left edge exceeding about 3mm around the glass is usually reserved before the laminated glass enters a rolling furnace after lamination (which is the first glue repair, which is a necessary process because the purchased glue layer is usually wider than the glass in size and is usually coiled, and the glass substrate is square), prepressing is carried out after the first glue repair (the glass substrate speed range can only be 1.3-1.4m/min, and the prepressing heating temperature must be less than or equal to 240 ℃), and finally pressing, after the glass is discharged from a high-pressure kettle, the residual glue around the laminated glass is repaired by a lower shelf worker (the second glue repair makes the glass edge part flush with the glue layer), and the worker operates to improve the glue repair efficiency because of the stress concentration of the corner part of the glass in the process of the lower shelf post-repair, the speed is high, the force is difficult to control stably, and the corner breakage and the peeling of the glass are easily caused to influence the appearance quality; meanwhile, because the preparation method of the laminated glass is vertically placed in the burning kettle, the residual glue (indicated by an arrow in figure 3) at the contact part of the bottom edge of the glass and a trolley of the high-pressure kettle is extruded and is difficult to clean, so that coating discharge is easy to cause, meanwhile, the glue is repaired for the second time when the glass is put on a shelf, so that the problem of adhesive tape (indicated by an arrow in figure 2) is caused, specifically, the part of the glue layer between the two glass substrates overflows to the surface of one glass substrate after prepressing and final pressing, the adhesion is extremely firm because the glue layer and the glass substrates are combined by molecular bonds, and the glue layer overflowing to the surface of one glass substrate has viscosity and is difficult to clean, so that the part cannot be coated during coating, the whole coating is uneven, and the coated glass is scrapped. The whole production process needs glue repair twice, and has the disadvantages of multiple processes, high rejection rate and high loss.
Disclosure of Invention
The invention aims to provide a preparation method of laminated glass, which aims to solve the problems that the conventional laminated glass needs to be subjected to glue repair twice, the process is multiple, the rejection rate is high and the loss is large.
In order to achieve the purpose, the invention adopts a technical scheme that:
a preparation method of laminated glass comprises the following steps:
s1, cutting to obtain a first glass substrate and a second glass substrate, and preprocessing the first glass substrate and the second glass substrate;
s2, respectively carrying out heat treatment on the pretreated first glass substrate and the second glass substrate by a physical tempering method;
s3, arranging a glue layer laminating sheet between the first glass substrate and the second glass substrate, wherein the heat shrinkage rate of the glue layer is less than or equal to 1.5%;
s4, glue repairing treatment is carried out on the first glass substrate and the second glass substrate after the sheet combination, and the glue repairing treatment method comprises the following steps: removing the adhesive layers which exceed the four sides of the first glass substrate and the second glass substrate, and respectively aligning the adhesive layers on the four sides of the first glass substrate and the second glass substrate with the corresponding side parts of the first glass substrate and the second glass substrate;
s5, pre-pressing the first glass substrate and the second glass substrate after glue trimming;
and S6, moving the pre-pressed first glass substrate and second glass substrate into an autoclave for final pressing to obtain the laminated glass.
Preferably, in step S5, the glass substrate running speed during pre-pressing is not less than 1.5m/min and not more than 3 m/min.
Preferably, in step S5, the heating temperature during pre-pressing is 260-300 ℃.
Preferably, in step S3, the adhesive layer located between the first glass substrate and the second glass substrate is PVB, and the thickness of the adhesive layer is in the range of 1-2 mm.
Preferably, in step S3, the adhesive layer located between the first glass substrate and the second glass substrate is SGP, and the thickness of the adhesive layer is in the range of 1.5-2.5 mm.
Preferably, in step S6, the autoclave is cooled to a temperature lower than 45 ℃ for exhausting, wherein the temperature range of the autoclave is 130-135 ℃, the pressure range of the pressure maintaining is 12-12.2bar, and the time range of the temperature maintaining is 40-60 min.
Preferably, in step S6, the autoclave is cooled to a temperature lower than 45 ℃ for exhausting, wherein the temperature is 135-.
Preferably, in step S5, after pre-pressing the first glass substrate and the second glass substrate after trimming, the tapping temperature is controlled to be 55-75 ℃.
Preferably, in step S2, the heat treatment process is as follows: the furnace temperature is controlled at 680-720 ℃, the first glass substrate and the second glass substrate are uniformly heated and controlled at 610-630 ℃, and then the glass substrates are rapidly and uniformly cooled to the room temperature within the preset time threshold range.
Preferably, in step S6, if the adhesive layer between the first glass substrate and the second glass substrate is PVB, the temperature range of the autoclave is 130-135 ℃, the pressure range is 12-12.2bar, the time range is 40-60min, and the autoclave is cooled to below 45 ℃ for exhausting;
in step S6, when the glue layer between the first glass substrate and the second glass substrate is SGP, the autoclave is cooled to a temperature lower than 45 ℃ and exhausted at a temperature ranging from 135 ℃ to 138 ℃, a pressure maintaining pressure ranging from 12.2 to 12.5bar, and a temperature maintaining time ranging from 90 to 120 min.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the preparation method provided by the invention only relates to one-time glue repair, simplifies the process flow, reduces the production time and improves the production efficiency; the prepared laminated glass has no corner breakage and peeling, avoids discharging and adhesive tape waste during film coating, and greatly improves the quality of the laminated glass; because glue does not need to be repaired after final pressing, the laminated glass after final pressing can be directly transferred into a coating cavity, and the mechanization and automation of the laminated glass processing are realized.
Drawings
FIG. 1 is a schematic structural view of a laminated glass of the present invention;
FIG. 2 is a photograph showing that adhesive tapes are provided on the outer surface of a laminated glass obtained by a conventional production method;
FIG. 3 is a photograph of a laminated glass obtained by a conventional production method.
In the above drawings:
1-a first glass substrate, 2-an adhesive layer, and 3-a second glass substrate.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.
A preparation method of laminated glass comprises the following steps:
s1, cutting to obtain a first glass substrate 1 and a second glass substrate 3, and preprocessing the first glass substrate 1 and the second glass substrate 3, wherein the preprocessing comprises chamfering, coarse grinding or fine grinding;
and cutting the first glass substrate 1 and the second glass substrate 3 according to the type, the thickness and the size of the required substrates, and performing edge processing including chamfering, coarse grinding or fine grinding on the first glass substrate 1 and the second glass substrate 3 according to requirements.
S2, respectively carrying out heat treatment on the first glass substrate 1 and the second glass substrate 3 by a physical tempering method;
in step S2, the heat treatment process is as follows: the furnace temperature is controlled at 680-720 ℃, the first glass substrate 1 and the second glass substrate 3 are uniformly heated and controlled at 610-630 ℃, and then the glass substrates are rapidly and uniformly cooled to the room temperature within the preset time threshold range.
If first glass substrate 1, 3 thicknesses of second glass substrate are 6mm, when carrying out full tempering: the furnace temperature is controlled at 680-720 ℃, the glass is uniformly heated to 610-630 ℃, then the glass is uniformly cooled to 350-450 ℃ at 10-12 ℃/s through the wind pressure of 2500-3000Pa, and then the glass is uniformly cooled to the room temperature at 10-12 ℃/s through the wind pressure of 700-1200Pa, specifically, the furnace temperature is controlled at about 700 ℃, and the glass is uniformly heated to about 620 ℃.
If first glass substrate 1, 3 thicknesses of second glass substrate are 6mm, when carrying out half tempering: the furnace temperature is controlled at 680-720 ℃, the glass is uniformly heated to 610-630 ℃, then uniformly cooled to 350-450 ℃ at 1.5-2.5 ℃/s through the wind pressure of 100-120Pa, and then uniformly cooled to the room temperature at 10-12 ℃/s through the wind pressure of 700-1200Pa, specifically, the furnace temperature is controlled at about 700 ℃, and the glass is uniformly heated to about 620 ℃.
S3, cleaning and drying the first glass substrate 1 and the second glass substrate 3 by deionized pure water, arranging a glue layer laminating sheet between the first glass substrate 1 and the second glass substrate 3, wherein the first glass substrate 1 and the second glass substrate 3 are oppositely arranged, the length and the width of the first glass substrate 1 are equal to those of the second glass substrate 3, and the thermal shrinkage rate of the glue layer 2 is less than or equal to 1.5%, and is optimally 0.5-1.5%.
The thermal shrinkage of the glue layer 2 was measured by the following method: the 100mm x 100mm sample was placed in a vacuum oven at 80 ℃ and after 15 minutes heating, the change in length of the sample before and after heating was measured.
The thermal shrinkage of the adhesive layer 2 is mainly affected by the casting speed and tension in the production process thereof, and the thermal shrinkage can be reduced by reducing the casting speed and tension.
S4, glue repairing treatment is carried out on the first glass substrate and the second glass substrate after the laminating, and the method comprises the following steps: the glue layers 2 exceeding the four sides of the first glass substrate and the second glass substrate are removed, so that the glue layers 2 of the four sides of the first glass substrate and the second glass substrate are trimmed with the corresponding sides of the first glass substrate and the second glass substrate, glue trimming is only performed once in the whole preparation process, the process flow is greatly simplified, and the production efficiency is greatly improved. The lamination is carried out in a thermostatic chamber with the temperature range of 22-28 ℃ and the humidity of 18-28%.
In step S3, the adhesive layer 2 located between the first glass substrate 1 and the second glass substrate 3 is PVB, the thickness of the PVB adhesive layer 2 is in a range of 1-2mm, and may be 1.14, 1.52, or 1.9mm, where the PVB adhesive layer 2 is located between the air surface of the first glass substrate 1 and the tin surface of the second glass substrate 3.
In step S3, the adhesive layer 2 located between the first glass substrate 1 and the second glass substrate 3 is SGP, the SGP adhesive layer 2 has a thickness ranging from 1.5 mm to 2.5mm, and the thickness may be 1.52mm or 2.28mm, wherein the SGP adhesive layer 2 is located between the tin surface of the first glass substrate 1 and the tin surface of the second glass substrate 3.
And S5, pre-pressing the first glass substrate and the second glass substrate after glue trimming, wherein the running speed of the glass substrates is more than or equal to 1.5m/min and less than or equal to 3m/min during pre-pressing, the pre-pressing heating temperature is 260-300 ℃, the rolling pressure is 6-8bar, and the pre-pressing is carried out at a higher speed and a higher temperature, so that the glue layer 2 between the first glass substrate 1 and the second glass substrate 3 can be prevented from shrinking inwards, and the glue layers 2 at the four sides of the first glass substrate 1 and the second glass substrate 3 can be always kept flush with the corresponding side parts of the first glass substrate 1 and the second glass substrate 3.
In step S5, the first glass substrate and the second glass substrate after glue trimming are pre-pressed, and then the tapping temperature is controlled to 55-75 ℃.
With the technology of constant temperature convection current, carry out the pre-compaction to repairing glued first glass substrate 1 and second glass substrate 3, specifically: the first glass substrate 1 and the second glass substrate 3 after glue repairing are placed into a convection rolling furnace for convection heating, the convection rolling furnace comprises a heating area and a rolling area which are sequentially arranged, the heating area comprises a plurality of groups of convection air boxes, the left side and the right side of the upper portion of the first glass substrate 1 and the left side and the right side of the lower portion of the second glass substrate 3 are respectively provided with two groups of convection air boxes, and the left side and the right side of the lower portion of the first glass substrate are respectively provided with two groups of convection air boxes. Each convection air box corresponds to a 1.1KW fan, the rotating speed is controlled at 1000-1400r/min, a plurality of heating wires are distributed in front of the fan, the fan is used for transmitting heat generated by the heating wires to glass, and each heating wire is 3000W and is used for generating a heat source; the hot air is blown to the surface of the glass by the convection fan, so that the upper space and the lower space of the glass substrate form gas convection, and the glass and the adhesive layer are rapidly and uniformly heated. The first glass substrate 1 and the second glass substrate 3 are heated by convection and then rolled by a press roll in a roll nip, the press roll is an air pressure rubber roll, and the running speed of the glass substrates is set to be 1.5-3 m/min.
The constant-temperature convection rolling process is adopted, so that heating instability caused by temperature difference change of the convection rolling furnace is avoided, the glue layer 2 and the glass substrate are heated fully and uniformly, large-area bubbles are avoided, and the production quality is improved.
Or the prepressing adopts an infrared radiation heating furnace, and the heating temperature is 260-300 ℃.
And S6, moving the pre-pressed first glass substrate and second glass substrate into an autoclave for final pressing to obtain the laminated glass. The autoclave is a cavity, the pressure of the laminated glass on each part in the autoclave is balanced, the shrinkage of the adhesive layer 2 is very small and basically invisible in the final pressing process, and the adhesive layer 2 on four sides of the first glass substrate 1 and the second glass substrate 3 is equivalent to the fact that the corresponding edges of the first glass substrate 1 and the second glass substrate 3 are flush.
In step S6, if the adhesive layer 2 between the first glass substrate 1 and the second glass substrate 3 is PVB, the autoclave is cooled to a temperature lower than 45 ℃ for exhausting, wherein the temperature range is 130-135 ℃, the pressure range is 12-12.2bar, and the time range is 40-60 min.
In step S6, when the glue layer 2 between the first glass substrate 1 and the second glass substrate 3 is SGP, the autoclave is cooled to below 45 ℃ for exhausting, with the temperature range of 135-.
A laminated glass, which is prepared by the above laminated glass preparation method, referring to fig. 1, and includes a first glass substrate 1, a second glass substrate 3, and a glue layer 2 bonded between the first glass substrate 1 and the second glass substrate 3, where the glue layer 2 is PVB or SGP, and if the glue layer 2 is PVB, the thickness of the glue layer is in a range of 1-2 mm; if the glue layer 2 is SGP, the thickness of the glue layer ranges from 1.5 mm to 2.5 mm.
The device comprises a laminating chamber, a prepressing chamber, a high-pressure kettle, a coating cavity and a transfer mechanism, wherein the transfer mechanism is used for conveying a first glass substrate 1 and a second glass substrate 3 into the laminating chamber, conveying the glass substrates subjected to glue trimming into the prepressing chamber, conveying the glass substrates subjected to prepressing into the high-pressure kettle and conveying the laminated glass subjected to final pressing into the coating cavity. The transfer mechanism may be a robot.
Examples
The specific steps for preparing the laminated glass are as follows:
s1, cutting the first glass substrate 1 and the second glass substrate 3 according to the type, the thickness and the size of a required substrate, and performing edge processing including chamfering, rough grinding or fine grinding on the first glass substrate 1 and the second glass substrate 3 according to requirements, wherein the thicknesses of the first glass substrate 1 and the second glass substrate 3 are both 6 mm;
s2, respectively carrying out heat treatment on the first glass substrate 1 and the second glass substrate 3 by a physical tempering method, and when carrying out full tempering: controlling the furnace temperature at 700 ℃, uniformly heating the glass to 620 ℃, uniformly cooling to 400 ℃ at 11 ℃/s through the wind pressure of 2800Pa, and uniformly cooling to room temperature at 11 ℃/s through the wind pressure of 1000 Pa;
s3, arranging a glue layer re-laminating sheet between the first glass substrate 1 and the second glass substrate 3, wherein the glue layer 2 is PVB, the thermal shrinkage rate of the glue layer 2 is 1.3%, and the thickness of the glue layer 2 is 1.52 mm;
s4, glue trimming treatment is carried out on the first glass substrate and the second glass substrate after the sheet combination, the glue layers 2 which exceed the four sides of the first glass substrate and the second glass substrate are removed, the glue layers 2 on the four sides of the first glass substrate and the second glass substrate are aligned with the corresponding edges of the first glass substrate and the second glass substrate, the sheet combination is carried out in a thermostatic chamber, the temperature range is 25 ℃, and the humidity is 23%.
S5, pre-pressing the first glass substrate and the second glass substrate after glue trimming, wherein the running speed of the glass substrates is 2m/min, the pre-pressing heating temperature is 280 ℃, the rolling pressure is 6.5bar, and the tapping temperature is controlled at 60 ℃ after pre-pressing.
And S6, moving the pre-pressed first glass substrate and second glass substrate into an autoclave for final pressure to obtain the laminated glass, wherein the temperature range of the autoclave is 132 ℃, the pressure range is 12.1bar, the temperature range is 50min, and cooling is carried out to 25 ℃ for exhausting.
Comparative example
The present example differs from the embodiment in that: relates to two-time glue repair.
The specific steps for preparing the laminated glass are as follows:
s1, cutting the first glass substrate 1 and the second glass substrate 3 according to the type, the thickness and the size of a required substrate, and performing edge processing including chamfering, rough grinding or fine grinding on the first glass substrate 1 and the second glass substrate 3 according to requirements, wherein the thicknesses of the first glass substrate 1 and the second glass substrate 3 are both 6 mm;
s2, respectively carrying out heat treatment on the first glass substrate 1 and the second glass substrate 3 by a physical tempering method, and when carrying out full tempering: the furnace temperature is controlled at 700 ℃, the glass is uniformly heated to 620 ℃, then is uniformly cooled to 400 ℃ at the speed of 11 ℃/s through the wind pressure of 2800Pa, and is uniformly cooled to the room temperature at the speed of 11 ℃/s through the wind pressure of 1000 Pa;
s3, arranging a glue layer and laminating between the first glass substrate 1 and the second glass substrate 3, wherein the glue layer 2 is PVB, the thermal shrinkage rate of the glue layer 2 is 8%, and the thickness of the glue layer is 1.52mm, and the amount of the edge glue layer exceeding the periphery of the glass substrate by about 3mm is reserved;
s4, performing glue repairing treatment on the first glass substrate and the second glass substrate after laminating, reserving an edge glue layer which exceeds the peripheries of the first glass substrate and the second glass substrate by 3mm, and performing laminating in a thermostatic chamber at the temperature range of 25 ℃ and the humidity of 23%;
s5, pre-pressing the first glass substrate and the second glass substrate after glue trimming, wherein the running speed of the glass substrates is 1.3m/min, the pre-pressing heating temperature is 240 ℃, the rolling pressure is 6.5bar, and the tapping temperature is controlled at 60 ℃ after pre-pressing;
s6, moving the pre-pressed first glass substrate and second glass substrate into an autoclave for final pressure, wherein the temperature range of the autoclave is 132 ℃, the pressure range of the pressure maintaining is 12.1bar, the temperature range is 50min, cooling to 25 ℃ and exhausting;
and S7, performing secondary glue repairing on the finally pressed laminated glass, and removing the glue layers which exceed the four edges of the glass, so that the glue layers on the four edges of the glass are trimmed with the edges of the glass.
The performance test data for the laminated glasses prepared by the two preparation processes are shown in table 1:
table 1 comparative table of performance test data of laminated glass prepared by two preparation processes
As can be seen from table 1, the edge portions of the laminated glass prepared by the method have no broken corner peeling, and the broken corner peeling proportion of the edge portions is reduced from 90% to 0%; 6 people can be reduced, and the labor cost is saved by 53 ten thousand yuan each year; the discharge of the coating film of the interlayer and the waste of the adhesive tape are avoided, 1.5 ten thousand square meters per year can be saved, and the cost is saved by 225 ten thousand.
The laminated glass prepared by the preparation method of the laminated glass has the advantages that: 1) the method only relates to one-time glue repair, simplifies the process flow, reduces the production time and improves the production efficiency; 2) after glass is pre-pressed and finally pressed, the glue layer between the first glass substrate and the second glass substrate cannot overflow to the outer surface of the substrate, and the finally prepared laminated glass has no corner collapse and skin falling, so that discharging and adhesive tape waste during film coating are avoided, and the quality of the laminated glass is greatly improved; 3) because glue does not need to be repaired after final pressing, the laminated glass after final pressing can be directly transferred into a coating cavity, the mechanical and automatic processing of the laminated glass is realized, because the glue is repaired twice in the existing laminated glass preparation, the laminated glass after final pressing needs to be conveyed into a glue repairing chamber for glue repairing when the glue is repaired for the second time, the laminated glass after final pressing cannot be directly conveyed into the coating cavity, the method relates to the glue repairing for the first time, and the laminated glass after final pressing can be directly conveyed into the coating cavity through a transfer mechanism for coating.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.
Claims (10)
1. A method for preparing laminated glass is characterized in that: the method comprises the following steps:
s1, cutting to obtain a first glass substrate and a second glass substrate, and preprocessing the first glass substrate and the second glass substrate;
s2, respectively carrying out heat treatment on the pretreated first glass substrate and the second glass substrate by a physical tempering method;
s3, arranging a glue layer laminating sheet between the first glass substrate and the second glass substrate, wherein the heat shrinkage rate of the glue layer is less than or equal to 1.5%;
s4, glue repairing treatment is carried out on the first glass substrate and the second glass substrate after the sheet combination, and the glue repairing treatment method comprises the following steps: removing the adhesive layers which exceed the four sides of the first glass substrate and the second glass substrate, and respectively aligning the adhesive layers on the four sides of the first glass substrate and the second glass substrate with the corresponding side parts of the first glass substrate and the second glass substrate;
s5, pre-pressing the first glass substrate and the second glass substrate after glue trimming;
and S6, moving the pre-pressed first glass substrate and second glass substrate into an autoclave for final pressing to obtain the laminated glass.
2. The process for producing a laminated glass according to claim 1, characterized in that: in step S5, the glass substrate is moved at a speed of 1.5m/min to 3 m/min.
3. The process for producing a laminated glass according to claim 1, characterized in that: in step S5, the heating temperature during pre-pressing is 260-300 ℃.
4. The method for producing a laminated glass according to claim 1, characterized in that: in step S3, the adhesive layer between the first glass substrate and the second glass substrate is PVB, and the thickness of the adhesive layer is 1-2 mm.
5. The process for producing a laminated glass according to claim 1, characterized in that: in step S3, the glue layer located between the first glass substrate and the second glass substrate is SGP, and the thickness of the glue layer ranges from 1.5 mm to 2.5 mm.
6. The process for producing a laminated glass according to claim 4, characterized in that: in step S6, the temperature range of the high-pressure kettle is 130-135 ℃, the pressure range of the pressure is 12-12.2bar, the temperature range is 40-60min, and the high-pressure kettle is cooled to be lower than 45 ℃ for exhausting.
7. The process for producing a laminated glass according to claim 5, characterized in that: in step S6, the temperature range of the autoclave is 135-138 ℃, the pressure range of the pressure is 12.2-12.5bar, the temperature range is 90-120min, and the autoclave is cooled to be lower than 45 ℃ for exhausting.
8. The process for producing a laminated glass according to claim 1, characterized in that: in step S5, the first glass substrate and the second glass substrate after glue trimming are pre-pressed, and the tapping temperature is controlled to be 55-75 ℃.
9. The process for producing a laminated glass according to claim 1, characterized in that: in step S2, the heat treatment process is as follows: the furnace temperature is controlled at 680-720 ℃, the first glass substrate and the second glass substrate are uniformly heated and controlled at 610-630 ℃, and then the glass substrates are rapidly and uniformly cooled to the room temperature within the preset time threshold range.
10. The process for producing a laminated glass according to claim 9, characterized in that: in step S6, if the adhesive layer between the first glass substrate and the second glass substrate is PVB, the temperature range of the autoclave is 130-135 ℃, the pressure range is 12-12.2bar, the time range is 40-60min, and the autoclave is cooled to be lower than 45 ℃ for exhausting;
in step S6, when the glue layer between the first glass substrate and the second glass substrate is SGP, the autoclave is cooled to a temperature lower than 45 ℃ and exhausted at a temperature ranging from 135 ℃ to 138 ℃, a pressure maintaining pressure ranging from 12.2 to 12.5bar, and a temperature maintaining time ranging from 90 to 120 min.
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| CN107984863A (en) * | 2017-11-28 | 2018-05-04 | 咸宁南玻节能玻璃有限公司 | A kind of sheet interlayer glass and its production technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107984863A (en) * | 2017-11-28 | 2018-05-04 | 咸宁南玻节能玻璃有限公司 | A kind of sheet interlayer glass and its production technology |
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