KR101157793B1

KR101157793B1 - Tempered Glass Manufacture Method

Info

Publication number: KR101157793B1
Application number: KR1020100017942A
Authority: KR
Inventors: 손종우
Original assignee: (주) 태양기전
Priority date: 2010-02-26
Filing date: 2010-02-26
Publication date: 2012-06-19
Also published as: KR20110098362A

Abstract

The present invention relates to a method for processing tempered glass, and more particularly, after cutting the original glass into cell glass, the uniform cell coating can be ensured by laminating and bonding the cut cell glass with a binder. In addition, the present invention relates to a tempered glass processing method capable of shortening a bonding time.
The present invention can be applied not only to glass substrates used as display panels, but also to glass processing for all displays, including display window processing used in portable electronic devices such as mobile phones, PDPs, PMPs, and electronic dictionaries.

Description

Tempered Glass Manufacturing Method {Tempered Glass Manufacture Method}

The present invention relates to a method for processing tempered glass, and more particularly, after cutting the original glass into cell unit glass, it is possible to secure uniformity of application of the binder by laminating the cut cell unit tempered glass using a binder. In addition, the present invention relates to a tempered glass processing method capable of shortening a bonding time.

The present invention can be applied not only to glass substrates used as display panels, but also to glass processing for all displays, including display window processing used in portable electronic devices such as mobile phones, PDPs, PMPs, and electronic dictionaries.

As portable electronic devices become lighter and thinner, the display panel becomes thinner and thinner, and synthetic resin materials such as acrylic or PMMA, which are generally used as display panels, are vulnerable to heat and scratches, and have a lower transmittance than glass, resulting in low luminance. Thus, a glass display panel is used.

However, in general glass, since the strength is weak, there is a limit in slimming the thickness, so display panels and windows using tempered glass are widely used.

In the conventional tempered glass processing process, a glass sheet is cut into a cell unit glass suitable for a display panel or window size, and then a sheet machining process is completed through chemical strengthening after surface machining. In this case, every cut cell unit glass is used. Since it is necessary to carry out the surface machining, it takes a lot of manpower and time, not only the productivity is very low, but also the process cost increases.

In order to solve the above problems, a lamination processing process is performed in which a glass disc is laminated using a bonding material, and the laminated glass disc is cut into a block shape in which cell unit glass is laminated to perform surface machining.

However, in the conventional bonding processing process, since the glass discs must be bonded, the bonding area is wide, so that it is difficult to uniformly apply the bonding material to be applied between the glass discs.

As described above, when the bonding uniformity decreases, curvature occurs in the laminated glass discs, thereby lowering the accuracy of the cutting to the cell unit glass.

In addition, in the case of the original glass, because the scratches or stains may occur on the glass surface during bonding to reduce the quality of the glass, there was also a problem of lowering the productivity and yield.

In order to solve the above problems, an object of the present invention is to minimize the bonding area to which the bonding agent is applied by laminating the cell unit glass in the form of a block using a bonding agent in a state in which the original glass is cut into the cell unit glass. It is to provide a tempered glass processing method that can ensure the uniformity of the bonding agent to improve the productivity and yield.

In addition, by providing a protective coating on both sides of the original glass glass before the cell unit glass cutting to provide a tempered glass processing method that can prevent the occurrence of scratches and stains of the original glass when the cell unit glass laminated bonding.

In order to achieve the above object, the tempered glass processing method according to the present invention comprises the steps of cutting the original glass to the cell unit glass and laminating the cut cell unit glass using a bonding agent to form a cell unit glass block And roughing the cell unit glass block.

The method may further include forming a protective coating layer on both sides of the disc glass before the cutting step and removing the protective coating layer after the surface machining step.

The step of roughing may include roughing the cell unit glass block and finishing machining by separating the rough cell unit glass block.

In addition, the protective coating layer is formed by printing and drying on both sides of the glass master plate using a silk printing machine carrying a protective ink.

And the protective ink is characterized in that the compound containing epoxy resin or epoxy resin.

In addition, the step of removing the protective coating layer is a solution of sodium hydroxide (NaOH) or potassium hydroxide (KOH) 3 to 10% by diluting in water or pure water to soak by ultrasonic at a temperature of 70 ~ 90 degrees to remove the protective coating layer. It features.

And further comprising a cleaning step after the surface finishing step; The washing step may include hot air drying or high temperature pure drying (HOT DI Water).

As described above, the tempered glass processing method according to the present invention minimizes the bonding area to which the bonding agent is applied by laminating the cell unit glass in the form of a block using a bonding agent in a state in which the original glass is cut into the cell unit glass. Excellent effect is obtained to ensure uniformity of the agent to improve productivity and yield.

In addition, by protective coating the both sides of the original glass before the cell unit glass cutting to prevent scratches and stains of the original glass when the cell unit glass laminated bonding to produce an excellent effect to minimize the defective rate of the product to improve the yield.

1 is a process diagram schematically showing a tempered glass processing method according to a preferred embodiment of the present invention.
2 is a flowchart of FIG. 1.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

1 is a process diagram schematically showing a tempered glass processing method according to a preferred embodiment of the present invention, Figure 2 is a flow chart of FIG.

1 and 2, in the tempered glass processing method according to the present invention, first, the original glass 10 is cut into cell unit glass.

More specifically, the original glass needs to cut the cell unit glass according to the size of the display panel or the window. For this purpose, the original glass is cut into the cell unit glass using CNC cutting, laser cutting or scribing cutting using a glass cutter.

Herein, the cell unit glass refers to a unit glass cut to a size according to a display window specification of a display panel or a portable electronic device.

Subsequently, the cut cell unit glass is laminated and bonded using the bonding agent 30 to form a cell unit glass block 40. (S120)

The binder 30 may be any material having adhesiveness and adhesion to temporarily bond the cell unit glass, and more specifically, natural bonding such as rosin, starch, starch, protein, polysaccharide, and latex. Or synthetic binders such as epoxy, melamine, urea, phenol, silicone and the like.

The bonding agent 30 does not permanently bond the cell unit glass, but because it temporarily bonds, the adhesive force does not need to be too high, and only the adhesive force that can be separated by a small force does not fall off the cell unit glass. Since it is necessary, it is preferable to use natural binders, such as rosin, rather than a synthetic binder.

The binder 30 may be coated between the cell unit glasses in a liquid state, and then hardened or cooled to form the binder in a solid state and the cell unit glass may be bonded. As a result, the cell unit glass block 40 is formed by vertically laminating and bonding the cell unit glass.

When the cell unit glass block 40 is formed as described above, the surface side of the block is processed.

More specifically, first, the cell unit glass block 40 is roughed first. (S130)

Since the side of the cut cell unit glass block 40 has a high roughness by cutting from the disc glass, it is necessary to process the side smoothly. For this purpose, the four sides of the cell unit glass block are smoothly polished through a grinder. Rough machining is performed.

Through the roughing process for the cell unit glass block 40 as described above, it is possible to increase the processing speed and productivity compared to roughing the conventional cell unit glass by sheet.

When roughing is finished, the cell unit glass block is separated into sheets to perform secondary finishing. (S140)

Here, the sheet separation of the cell unit glass block 40 may be performed by manual or mechanical operation, and the bonding agent 30 between the cell unit glass has a bonding force enough to be separated by an artificial force. Therefore, it can be easily separated and removed. However, when the cell unit glass block 40 is separated by the artificial force, the binder component may remain in the separated glass, and thus a process of removing the remaining binder component may be added.

To this end, the binder component may be removed by ultrasonic cleaning with a detergent of acetone or alcohol, an alkali component (HP 7 or more).

In addition, since the binder 30 is bonded to the cell unit glass in a solid state by curing, the binder 30 may be melted in a liquid state by heat to remove the binder from the glass surface through cleaning. In this case, when the binder is melted in a liquid state by heat, the binder may affect the glass itself. Therefore, the binder should be prepared to melt at a temperature lower than the melting temperature of the glass.

Since the first roughing is performed on the entire side of the cell unit glass block 40, the side roughness may remain, and thus the second roughing is performed on the individual sheet. Here, the secondary finishing may be omitted if the side surface is as smooth as the required specification of the glass as a result of the first rough machining.

When the surface finishing is completed as described above to perform the heat treatment strengthening or chemical strengthening of the cell unit glass to produce a strengthened cell unit glass, and finally to process the cell unit tempered glass through cleaning and inspection.

More specifically, the heat treatment strengthening is a method of heating the original glass 500 ~ 600 degrees close to the softening temperature, and quenched by compressed cooling air to compress and deform the glass surface portion and to tensilely deform the glass inside.

In addition, chemical strengthening is performed by putting glass in a cell unit into a reinforcing solution (potassium nitrate, pigment, etc.) and immersing it at a temperature of 400 to 500 degrees to strengthen the glass.Sodium ions and potassium ions in the reinforcing solution undergo ion exchange. Sodium ions, which are generated and distributed on the glass surface, are released and potassium enters the place, thereby increasing the density of the glass surface and causing compressive deformation on the glass surface.

When the tempered process for the glass is finished as described above, the final cell unit tempered glass is processed through washing and inspection.

In this case, the cleaning process may be a hot air drying method, but in the case of hot air drying, since the surface is dried in a state where water remains through a reinforcing process, many stains may occur on the surface. It is preferable to use the water method (high temperature pure drying method).

The HOT DI-Water method may be dried by removing the water remaining on the surface due to the difference in the surface tension between the water remaining on the surface and the high-temperature pure water to prevent staining on the surface.

After the drying of the HOT DI-Water as described above, the cleaning process may be finished by IR drying.

On the other hand, the present invention may further comprise the step (S100) to form a protective coating layer on the disc glass in order to prevent the scratch or stain generation before the cell unit glass cutting (S110).

In general, the glass is easily scratched through the cutting of the original glass and the lamination of the cut cell unit glass, and the surface of the glass is stained by the bonding agent between the cell unit glass. have.

Therefore, the protective coating layer may be formed on both sides of the original glass to remove scratches or staining defects resulting from subsequent processes.

More specifically, the protective coating layer formed on both sides of the disc glass is hot-air drying after printing both sides of the disc glass using an automatic or semi-automatic silk printing machine carrying a protective ink (for example, 20 to 20 at a drying temperature of 100 to 150 degrees). 40 minutes drying) or by using an IR dryer.

Here, the protective ink may be composed of an epoxy resin or a compound containing an epoxy resin, and a curing agent, a pigment, an additive, and a solvent may be mixed with the epoxy resin. For example, a protective ink may be prepared by blending an epoxy resin and a curing agent in an amount of 8: 1 to 15: 1.

In addition, conventional coating materials may be used in which a protective layer is formed on the surface of the original glass to protect the original glass.

And the protective ink is printed on both sides of the disc glass through the silk printing machine (for example, printing plate NBC mesh 100Mash, 45 or 22.5 degrees angle) is preferably printed in a thickness of 8 ~ 12um range, the hot air drying is The range of 140-160 degree is preferable.

When the protective coating layer is formed on both sides of the original glass as described above, the protective coating layer is removed after the finishing (S140). (S141)

Here, the protective coating layer is removed by diluting a 3-10% aqueous solution of sodium hydroxide (NaOH) or potassium hydroxide (KOH) in water or pure water and soaking for 5-15 minutes with ultrasonic waves at a temperature of 70-90 degrees (preferably 80 degrees). It can then be removed by washing with water or pure water.

When the protective coating layer is removed as described above, the adhesive remaining on the protective coating layer can be removed at the same time. Therefore, no separate treatment is required for removing the adhesive remaining on the glass after separation by artificial force when separating the sheet from the cell unit glass block. It is possible to prevent the occurrence of scratches or stains generated from the process.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

10 disc glass 20 protective coating layer
30 bonding agent 40 cell unit glass block

Claims

In the tempered glass processing method,
Cutting the disc glass into a cell unit glass;
Stacking the cut cell unit glass using a bonding agent to form a cell unit glass block;
And roughing the cell unit glass block, and separating and roughing the rough cell unit glass block.

The method of claim 1,
Before the above step of cutting
Forming a protective coating layer on both sides of the disc glass;
Tempering glass processing method further comprising the step of removing the protective coating layer after the step of machining.

delete

The method of claim 2,
The protective coating layer
Tempered glass processing method characterized in that it is formed by printing and drying on both sides of the glass disc using a silk printing machine carrying a protective ink.

The method of claim 4, wherein
The protective ink is
Tempered glass processing method characterized in that the epoxy resin or a compound containing epoxy resin.

The method of claim 2,
Removing the protective coating layer
Tempering glass processing method characterized in that for removing the protective coating layer by ultrasonic cleaning.

The method according to claim 6,
The ultrasonic cleaning is
Diluted solution of sodium hydroxide (NaOH) or potassium hydroxide (KOH) 3 to 10% in water or pure water to be immersed in ultrasonic at 70 ~ 90 degrees temperature to remove the protective coating layer.

The method of claim 1,
Further comprising a cleaning step after the surface finishing step;
The cleaning step is tempered glass processing method comprising hot air drying or hot high temperature drying (HOT DI Water) step.