KR20110114755A - Manufacturing process of tempered glass and tempered glass thereby - Google Patents

Abstract

Tempered glass manufacturing method according to the present invention is a method for producing tempered glass consisting of heat-treating the thin glass to be dried, washed, put a plurality of glass in an inert gas filled in the rapid heating space, rapid heating to 300 ~ 500 After the first heating for 8 to 12 seconds at ℃, to 100 ~ 150 ℃ in a non-heating state in the inert gas, and rapid heating to include a second heating for 4 to 6 seconds at 300 ~ 500 ℃ It is done by
In addition, a plurality of secondary-heated glass as described above is dropped to 100 ~ 150 ℃ in a non-heated state in the inert gas, rapid heating to heat for 8 to 12 seconds at 300 ~ 500 ℃, in the inert gas In the non-heated state to drop to 100 ~ 150 ℃, rapid heating to repeat the second heating for 4 to 6 seconds at 300 ~ 500 ℃, and then take out from the inert gas to cool.
Therefore, in the present invention, since the rapid heat treatment at 300 to 500 ° C. under an inert gas environment such as arcon and nitrogen, and then dropping to 100 to 150 ° C. and repeating the rapid heat treatment again, the change in sheet form or bent form The thin tempered glass can be easily heat-treated without heat, and can be heat-treated at low temperature and for a short time, thereby improving productivity and easily reducing energy waste.

Description

Manufacturing method of tempered glass and tempered glass manufactured therefrom {MANUFACTURING PROCESS OF TEMPERED GLASS AND TEMPERED GLASS THEREBY}

The present invention relates to a method for producing a thin tempered glass and to a tempered glass produced therefrom, and more particularly, to strengthen the heat treatment to easily heat the thin glass by repeating the rapid heat treatment in an inert gas environment It relates to a method for producing glass and to tempered glass produced therefrom.

In general, to strengthen the glass is divided into a chemical surface treatment method for strengthening the glass by ion exchange of the glass surface and a physical treatment method for treating the glass by heat to tightly bond the glass tissue.

Here, the chemical surface treatment method is to place the glass under a potassium nitrate environment at 450 ° C. so that the potassium ions of potassium nitrate are replaced with the sodium ions of the glass to strengthen the surface of the glass. As a result, the degree of strengthening of the glass is lowered.

Therefore, conventionally, there is a physical treatment method for maintaining the degree of tempered glass for a long time by tempering the glass with heat.

For example, in order to reinforce the laminated glass, it is transported through a horizontal tunnel furnace by a supporting mechanism supporting a plurality of laminated glass, and the heat softening temperature of the glass using hot air, gas, or a combination of these means. The heat treatment is carried out until, in order to shape or bend the thin glass into a form other than the flat form, the glass is formed after heating to a heat softening temperature.

However, the above method can improve productivity in that the glass is continuously strengthened by using a tunnel furnace, but since it heats the glass for a long time at the thermal softening temperature, it consumes a lot of energy to maintain high temperature heat. Factors that increase the production cost of the glass is generated, there is a disadvantage that the shape of the product can be changed if the thin glass product in the environment of the thermal softening temperature for a long time.

Therefore, it is very insufficient to heat-treat a glass product in which a thin glass body is commercialized, and thus, glass must be molded in a state in which thin glass is heated to a thermal softening temperature.

In particular, conventionally, due to the molding process of changing the shape of the glass after raising the glass to a heat treatment temperature, there is a disadvantage in that the glass is heated to a large number of times to be smoothly reinforced.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention by repeating the rapid heat treatment in the environment of an inert gas such as arcon, nitrogen, etc. to easily form a thin glass without changing the shape It is to provide a method for producing tempered glass that can be heat-treated and tempered glass produced therefrom.

In order to achieve the above object, the present invention is a method for producing tempered glass consisting of heat-treating the glass of the thin form washed and dried, a plurality of glass in the inert gas filled in the rapid heating space, by rapid heating After the first heating for 8 to 12 seconds at 300 ~ 500 ℃, in a non-heated state in the inert gas to 100 ~ 150 ℃, and rapidly heated again to 300 ~ 500 ℃ for 4 to 6 seconds secondary heating It is to provide a method for producing tempered glass comprising a, and to provide a tempered glass produced by such a method.

Furthermore, as described above, a plurality of secondary-heated glasses are dropped to 100 to 150 ° C. in a non-heated state in the inert gas, rapidly heated, and heated at 300 to 500 ° C. for 8 to 12 seconds, and in the inert gas. In a non-heated state at 100 to 150 ℃, rapid heating to repeat the second heating for 4 to 6 seconds at 300 to 500 ℃, and then take out of the inert gas to cool the glass To provide a manufacturing method, to provide a tempered glass produced by this method.

The method for producing tempered glass according to the present invention and the tempered glass prepared therefrom are rapidly heat treated at 300 to 500 ° C. under an inert gas environment such as arcon and nitrogen, and then dropped to 100 to 150 ° C. in that state. Because the rapid heat treatment is repeated, the thin glass can be easily heat-treated without changing the lamination or molded shape, and can be heat-treated at low temperature and for a short time to improve productivity and easily reduce energy waste. There is an advantage.

BRIEF DESCRIPTION OF THE DRAWINGS It is a drawing substitute photograph which shows the surface state of the thin glass before heat processing.
It is a drawing substitute photograph which shows the surface state of the thin glass after heat processing.
3 is a bar graph showing the rapid heat treatment temperature and the degree of bonding.

Hereinafter, preferred embodiments of the present invention will be described in detail with the accompanying drawings.

1 is a photograph showing the surface state of a thin glass before heat treatment, and it can be seen that the surface state is uneven when the surface state of the glass is viewed.

In order to reinforce the thin glass before the heat treatment, the glass is first heat treated after washing, dried, slow cooled after the first heat treatment, and secondary heat treated after the slow cooling to obtain a state as shown in FIG. 2. It relates to a manufacturing method including a step to.

That is, in the present invention, a plurality of glasses are placed in an inert gas filled in the rapid heating space, and rapidly cooled in an inert gas environment and then left in an unheated state to be gradually cooled.

For example, the rapid heating method uses a rapid thermal annealing (RTA) device having a temperature rising rate of 100 to 250 ° C / sec using a plurality of tungsten-halogen lamps installed along concentric circles, and the rapid heating space in the rapid heating device. After placing an inert gas such as nitrogen or arcon, and arranging a plurality of glasses, the glass is rapidly heated in an inert gas environment and slowly cooled in an unheated state.

Of course, in the non-heating state in which the rapid thermal annealing (RTA) device is not operated, the temperature drop rate of the rapid heating space in the rapid thermal annealing (RTA) device is 20 to 40 ° C / min.

In any case, the present invention is to put a plurality of glass in the inert gas filled in the rapid heating space, rapid heating to primary heating for 8 to 12 seconds at 300 ~ 500 ℃, 100 ~ 150 in a non-heating state in the inert gas And dropping to 2 ° C. and rapidly heating again to 300 ° C. to 500 ° C. for 2-6 seconds.

As an example, a plurality of glasses were placed in an argon gas filled in a rapid heating space of a rapid thermal annealing (RTA) device and rapidly heated at each temperature for 10 seconds, and then the tissue binding rate of the glass was compared.

As a result, as shown in Figure 3, it can be seen that the optimum temperature is excellent tissue binding force is 300 ~ 500 ℃, lower than 300 ℃ can be seen that the relatively low tissue binding force, higher than 500 ℃ tissue binding force You can see this falls.

In particular, the rapid heating temperature of 600 ℃ higher than 500 ℃ does not have a significant difference in the tissue binding force, but the consumption of electrical energy of the rapid thermal annealing (RTA) device due to the rise of the temperature is large, so that the electrical energy and tissue binding force The optimization temperature of the invention is from 300 to 500 ° C.

Moreover, also in heat processing time, the time of a primary heat processing is 8 to 12 second, and it is preferable that a secondary heat processing time is 4 to 6 second.

The primary heat treatment densifies the bonding of the glass tissues. The optimal time considering the binding density of the glass tissues and the productivity by minimizing the heat treatment time is 8 to 12 seconds. To reduce the defect (Defect), the optimum time considering the defect of the glass structure, the productivity by minimizing the heat treatment time is 4 to 6 seconds.

On the other hand, repeating the first rapid heat treatment and slow cooling, the second rapid heat treatment and slow cooling as described above increases the compactness of the glass tissue and reduces the defects of the holding tissue. Etc. can be improved by more than 15%.

Thus, in the present invention, a plurality of secondary heated glasses are dropped to 100 to 150 ° C. in a non-heated state in the inert gas, rapidly heated to be heated at 300 to 500 ° C. for 8 to 12 seconds, and in the inert gas. In the non-heated state to drop to 100 ~ 150 ℃, rapid heating to repeat the heat treatment for 4 to 6 seconds at 300 ~ 500 ℃, and then take out from the inert gas to include cooling.

Dropping to 100-150 degreeC in a non-heated state after rapid heat processing here is for stabilizing a glass structure.

In general, when the RTA (Rapid Thermal Annealing) device is operated, the glass in the rapid heating space rapidly reaches 300 to 500 ° C, and when the RTA (Rapid Thermal Annealing) device is stopped, the glass in the rapid heating space is rained. When it is in a thermal state and left in this state for about 10 minutes, the metal heating space and glass fall to 100 to 150 ° C and slowly cool down in an inert gas to realize stabilization of the structure.

The glass produced by the manufacturing method according to the present invention made as described above is to be strengthened as it is a product having a thin thickness of the thin plate shape, bending molded form.

In other words, the rapid heat-treatment of 300 to 500 ° C. in an inert gas environment such as arcon and nitrogen is so short that the work of reinforcing glass products is very smooth. Dropping to 150 ° C. and rapid heat treatment are repeated to prevent deformation of the glass.

none

Claims (3)

In the manufacturing method of the tempered glass consisting of heat-treating the thin glass of washing and dried,
The glass is placed in an inert gas filled in the rapid heating space, rapidly heated to primary heating at 300 to 500 ° C. for 8 to 12 seconds, and then dropped to 100 to 150 ° C. in a non-heated state in the inert gas. , Rapid heating again to produce a tempered glass comprising a second heating for 4 to 6 seconds at 300 ~ 500 ℃. The method of claim 1,
A plurality of secondary heated glasses are dropped to 100 to 150 ° C. in a non-heated state in the inert gas, rapidly heated to heat for 8 to 12 seconds at 300 to 500 ° C., and in a non-heated state in the inert gas. The method for producing tempered glass comprising the step of dropping down to 100 to 150 ° C., rapid heating to secondary heating at 300 to 500 ° C. for 4 to 6 seconds, and then taking out from the inert gas and cooling. Tempered glass made of any one of the preceding claims.

Images