CN106830703A - A kind of processing technology of antifog safety glass - Google Patents

Abstract

The invention relates to a processing technology of anti-fog tempered glass. The flat glass is heated up to 190-210°C at 8-10°C/10s, then raised to 280-320°C at 8°C/min, and then heated at 15°C/min. to 400-440°C, and finally raise the temperature to 620-660°C at 40°C/min, keep warm for 5-10 minutes; then make the glass temperature drop to 360°C within 8-10 seconds, when the glass temperature drops to 360°C, stop blowing Cool naturally to room temperature, and finally go through dipping, spray coating, baking and cleaning to obtain anti-fog tempered glass. The invention controls the heating and cooling process of the glass so that the original glass sheet can be heated evenly to ensure the flatness and strength of the glass, and the coating film on the glass can be firmly attached to the glass surface, which not only has a good anti-fog function, And can maintain long-term anti-fog.

Description

A processing technology of anti-fog tempered glass

technical field

The invention relates to the technical field of tempered glass preparation, in particular to a processing technology of anti-fog tempered glass.

Background technique

Tempered glass is widely used in automobile, construction and other industries due to its advantages such as high mechanical strength, excellent temperature resistance and good safety. For the existing automobile glass, when the automobile glass is in humid air or cold environment, because the temperature inside the car is higher than the temperature outside the car, the water vapor in the air condenses on the surface of the glass to form fog droplets, affecting the line of sight. There is a fan on the car, which can blow air to the windshield, and accelerate the air flow to facilitate the evaporation of water mist, but its effect is not good, and it cannot completely demist. At present, it is generally used to coat the glass with an anti-fog agent composed of a surfactant to solve this problem, but its operation is cumbersome, so it is very necessary to develop a tempered glass that itself has an anti-fog function. Anti-fog glass refers to the special physical or chemical treatment of ordinary glass to produce unique physical and chemical properties on the surface to prevent the surface of the glass from fogging, so as to achieve the effect of not affecting the visibility of the mirror image or the light transmittance of the glass. The preparation methods of anti-fog glass are mainly divided into two categories: preparation of hydrophobic anti-fog coating or hydrophilic anti-fog coating on the glass surface. At present, tempered glass with good anti-fog effect is rare.

Contents of the invention

The technical problem to be solved by the present invention is to provide a processing technology for anti-fog tempered glass in order to overcome the above-mentioned deficiencies in the prior art. Angle ≤ 6°, with better anti-fog effect.

In order to solve the deficiencies of the above-mentioned technical problems, the technical solution adopted by the present invention is: a processing technology of anti-fog tempered glass includes the following steps: placing the flat glass to be processed in a glass tempering furnace, Raise the temperature of the glass to 190-210°C at a heating rate of 8°C/min, then raise the temperature of the glass to 280-320°C at a heating rate of 8°C/min, and then raise the temperature of the glass at a heating rate of 15°C/min to 400-440°C, and finally raise the temperature of the glass to 620-660°C at a heating rate of 40°C/min. It will drop to 360°C within 8 to 10 seconds. When the temperature of the glass drops to 360°C, stop the blowing, take the glass out of the air grid, and cool it down to room temperature naturally; soak in the sodium sulfite solution between them for 30-50 minutes, then transfer the glass to a clear water tank for cleaning, and spray and coat the tempered glass after cleaning. , Fluorocarbon leveling agent 1-2%, ethanol 3-5%, methyl cinnamate 1-2%, and the rest of deionized water, put the tempered glass after coating into the oven for baking, Put the baked tempered glass into a cleaning machine to clean, and obtain the anti-fog tempered glass.

As a further optimization of the processing technology of an anti-fog tempered glass in the present invention: the working parameters of the spray coating operation are: air pressure is 0.52 MPa, and the spraying distance is 22 cm.

As a further optimization of the processing technology of an anti-fog tempered glass in the present invention: the working parameters of the baking operation are: the baking temperature is 200° C., and the baking time is 15 minutes.

Beneficial effect

1. In the anti-fog tempered glass processing technology of the present invention, a stepwise temperature rise is adopted in the glass heating stage, and the heating stage is divided into four stages: 190-210°C, 280-320°C, 400-440°C and 620-660°C , and the heating rate at each stage is different. Through the control of the above heating process, the tempered glass is prevented from warping due to the large temperature difference in an instant, and while ensuring the production efficiency, the original glass sheet can be heated evenly, and then The overall deformation of the glass is not distorted, ensuring the flatness of tempered glass products;

2. In the anti-fog tempered glass processing technology of the present invention, the tempered glass obtained after coating the glass surface has a good anti-fog effect, and the film layer has hydrophilicity, which can reduce the contact angle of the glass surface to water, making The obtained toughened glass has a contact angle of less than 6° to water. The anti-fog layer sprayed by the present invention is mainly composed of erucic acid and polyether silicone oil, and is equipped with methyl cinnamate and fluorocarbon leveling agent. Invented tempered glass has a relatively high flatness, so that the coating can be firmly attached to the glass surface, not only has a good anti-fog function, but also can maintain long-term anti-fog;

3. In the anti-fog tempered glass processing technology of the present invention, the heated glass is cooled rapidly, so that the glass temperature drops to 340-360°C within 8-10 seconds. Under the cooling rate limited by the present invention, the glass surface There will be a large gap between the cooling rate and the cooling rate inside the glass. Due to the slow cooling rate inside the glass, the adjustment time of the internal atomic position is long, and the volume tends to shrink. Therefore, a huge tensile stress will be generated on the surface glass and the strength of the tempered glass will be improved;

4. In the anti-fog tempered glass processing technology of the present invention, the tempered glass is dipped and washed, and the glass is immersed in a sodium sulfite solution with a pH value between 0.5 and 1.0. During the soaking process, the residual sulfide on the glass surface Nickel impurities will be gradually dissolved in the sodium sulfite solution, further reducing the chance of glass self-explosion.

detailed description

Example 1

A process for processing anti-fog tempered glass, comprising the following steps: placing the flat glass to be processed in a glass tempering furnace, raising the temperature of the glass to 190-210°C at a heating rate of 8°C/10s, and then heating the glass at a temperature of 8°C/10s The temperature of the glass is raised to 320°C at a heating rate of ℃/min, then the temperature of the glass is raised to 400°C at a heating rate of 15°C/min, and finally the temperature of the glass is raised to 620°C at a heating rate of 40°C/min , after heating up, keep warm for 5 minutes; then quickly place the glass on the air grid for rapid cooling, so that the glass temperature drops to 360°C within 8 seconds, when the glass temperature drops to 360°C, stop blowing, and remove the glass from the air grid Take it out and let it cool down to room temperature naturally; then immerse the naturally cooled glass in a sodium sulfite solution with a pH value between 0.5 and 1.0 for 30 minutes, then transfer the glass to a clean water pool for cleaning, and spray and coat the tempered glass after cleaning , the composition of spraying raw materials is 3% erucic acid, 4% polyether silicone oil, 1% fluorocarbon leveling agent, 5% ethanol, 1% methyl cinnamate and the rest of deionized water. Putting it into a baking oven for baking, putting the baked toughened glass into a washing machine to wash, and then the anti-fog toughened glass is obtained.

Example 2

A processing technology for anti-fog tempered glass, comprising the following steps: placing the flat glass to be processed in a glass tempering furnace, raising the temperature of the glass to 210°C at a heating rate of 10°C/10s, and then raising the temperature of the glass to 210°C at a heating rate of 8°C/10s The temperature of the glass is raised to 320°C at a heating rate of 15°C/min, then to 440°C at a heating rate of 15°C/min, and finally to 660°C at a heating rate of 40°C/min. After the end, keep warm for 10 minutes; then quickly place the glass on the air grid for rapid cooling, so that the glass temperature will drop to 360°C within 10 seconds. When the glass temperature drops to 360°C, stop blowing and take the glass out of the air grid. Naturally cool to room temperature; then immerse the naturally cooled glass in a sodium sulfite solution with a pH value between 0.5 and 1.0 for 50 minutes, then transfer the glass to a clear water pool for cleaning, and spray and coat the tempered glass after cleaning. The composition of raw materials is 8% erucic acid, 3% polyether silicone oil, 2% fluorocarbon leveling agent, 3% ethanol, 2% methyl cinnamate and the rest of deionized water. Put the tempered glass after coating into Baking in a baking oven, putting the baked tempered glass into a washing machine for cleaning, and then obtaining the anti-fog tempered glass.

Example 3

A processing technology for anti-fog tempered glass, comprising the following steps: placing the flat glass to be processed in a glass tempering furnace, raising the temperature of the glass to 200°C at a heating rate of 9°C/10s, and then raising the temperature of the glass to 200°C at a heating rate of 8°C/10s The temperature of the glass is raised to 300°C at a heating rate of 15°C/min, then to 420°C at a heating rate of 15°C/min, and finally to 640°C at a heating rate of 40°C/min. After the end, keep warm for 8 minutes; then quickly place the glass on the air grid for rapid cooling, so that the glass temperature will drop to 360°C within 9 seconds. When the glass temperature drops to 360°C, stop blowing and take the glass out of the air grid. Naturally cool to room temperature; then immerse the naturally cooled glass in a sodium sulfite solution with a pH value between 0.5 and 1.0 for 40 minutes, then transfer the glass to a clear water pool for cleaning, and spray and coat the tempered glass after cleaning. The composition of raw materials is 5% erucic acid, 4% polyether silicone oil, 1% fluorocarbon leveling agent, 4% ethanol, 2% methyl cinnamate and the rest of deionized water. Put the tempered glass after coating into Baking in a baking oven, putting the baked tempered glass into a washing machine for cleaning, and then obtaining the anti-fog tempered glass.

Tempered glass test data

The ordinary tempered glass is compared with the tempered glass of Example 1-3, and the results are as follows:

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As can be seen from the above, the tempered glass obtained by the method of the present invention, compared with the tempered glass of the traditional production method, 1, from the hardness point of view, the anti-fog tempered glass of the present invention is higher than the existing ordinary tempered glass; 2, from the stress According to the test, the anti-fog tempered glass of the present invention meets the requirements of safety glass; 3. From the perspective of water contact, the anti-fog tempered glass of the present invention has obvious hydrophilic effect, and the water contact angle is less than 6°, which has good anti-fog effect. Fog requirements; 4. From the adhesion performance test, the adhesion of the anti-fog tempered glass of the present invention is higher than that of the existing tempered glass.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (3)

1. a kind of processing technology of antifog safety glass, it is characterised in that：Obtained antifog safety glass to the contact angle of water≤ 6 °, comprise the following steps：Plate glass to be processed is placed in glass tempering furnace, is made with the heating rate of 8~10 DEG C/10s The temperature of glass is warming up to 190-210 DEG C, and the temperature for then making glass with the heating rate of 8 DEG C/min again is warming up to 280~320 DEG C, then the temperature of glass is warming up to 400~440 DEG C with the heating rate of 15 DEG C/min, finally with the intensification of 40 DEG C/min Speed makes the temperature of glass be warming up to 620-660 DEG C, after intensification terminates, and is incubated 5~10min；Then glass is immediately placed in wind Grid are quickly cooled down, and make glass temperature that 360 DEG C were down in 8~10 seconds, when glass temperature is down to 360 DEG C, stop blowing, Glass is taken out from air grid, room temperature is naturally cooled to；Then pH value will be immersed 0.5~1.0 by the glass of natural cooling Between sodium sulfite solution in, soak 30~50min, then glass is transferred in clear water reserviors and is cleaned, after cleaning Safety glass carries out spraying coating operation, and the composition of spraying raw material is erucic acid 3~8%, polyether silicone oil 3~4%, fluorine carbon levelling agent 1 ~2%, the deionized water of ethanol 3~5%, methyl cinnamate 1~2% and surplus, oven is put into by the safety glass after film In toasted, the safety glass after baking is put into cleaning machine and is cleaned, obtain final product the antifog safety glass.

2. as claimed in claim 1 a kind of processing technology of antifog safety glass, it is characterised in that：The spraying coating operation Running parameter is：Air pressure is 0.52MPa, and spray distance is 22cm.

3. as claimed in claim 1 a kind of processing technology of antifog safety glass, it is characterised in that：The work of the baking operation Parameter is：Baking temperature is 200 DEG C, and baking time is 15min.