KR20040087386A - Methode for manufacturing semitransparent glass - Google Patents

Abstract

PURPOSE: A method for preparing a semitransparent glass is provided, to allow the shape of the unevenness to be controlled for controlling the reflectivity, surface touch and strength of a plated glass. CONSTITUTION: The method comprises the steps of spraying water to a plated glass to allow the total surface of the plated glass to be wet for preventing the chemical marks from remaining in etching; vertically dipping the wet plated glass into a precipitation bath containing a corrosion solution composition to grow the unevenness on the surface of the plated glass (first etching); washing the plated glass with water to remove the sludge on the surface of the plated glass; dipping the wet plated glass into a precipitation bath containing a corrosion solution composition to re-grow the unevenness on the surface of the plated glass with allowing the grown uneven particles to be even (second etching); and washing the plated glass with water to remove the sludge on the surface of the plated glass. Preferably the corrosion solution composition comprises 10-60 wt% of NH4HF2, 0-25 wt% of H3PO4, 0-25 wt% of H2BO3, 30-60 wt% of a surfactant (glycerin and water) and 0-15 wt% of an enhancer; or 20-40 wt% of HF, 15-30 wt% of NH3, 2-10 wt% of H3PO4, 2-10 wt% of methanol and 30-60 wt% of distilled water.

Description

Method for manufacturing semitransparent glass

The present invention relates to a method of forming a low irregularities on the surface of the plate glass to a low reflection semi-transparent treatment, more specifically, to a low reflection of the glass surface by performing a combination of the etching (sanding) processing method To translucent processing.

Semi-transparent glass has the advantage of high scratch resistance and no scratches, and various changes are produced depending on the direction of light transmission and light, and the texture is very improved. .

Currently, the semi-transparent treatment method of the glass surface mainly used is mainly a sanding method and an etching method, and there are other physical methods using other engraving or pore polishing machines.

The sanding method is a physical method that produces fine irregularities on the surface of the glass by blasting sand on the surface of the plate glass at a high pressure. This method determines the depth of the irregularities according to the granularity of the sand used. Can produce products.

The etching method is a chemical method in which plate glass is immersed in a corrosion solution such as hydrogen fluoride (HF) to form unevenness by etching. This method can produce a large quantity of small products because of low production cost, but special equipment is needed when immersing or taking out the product. Especially, it is difficult to apply to flat glass products because stains are caused by solution flow and uneven corrosion is easily generated.

In addition, in the case of the etching method, since the plate glass is immersed and removed one by one horizontally by the corrosion solution, it is inconvenient to form a protective film on the back side of the plate glass which is difficult to produce a large amount and is not subjected to corrosion treatment.

Meanwhile, after forming rough and uniform irregularities on the surface of the plate glass by the sanding method in the related art, the sharp part of the irregularities formed on the surface of the plate glass is etched smoothly and grown to a smooth curved surface to produce fine and uniform irregularities. It also formed opacity. However, even in the case of such a complex treatment method, the staining flow of the etching solution remains, and the roughness of the roughness still remains, and there is no way to control the depth, size, and roughness of the roughness as desired. There was a problem that could not provide a pane.

The present invention devised to solve the above-mentioned problems is to carry out two or more steps of the etching process after the sanding process to control the depth and size of the irregularities on the glass surface to form a variety of, two plate glass By immersing the corrosive liquid in a vertical direction, it is possible to improve productivity without forming an etching protection film on the back side of the plate glass, and to uniformly distribute the concentration of the corrosion liquid by ultrasonic vibration to prevent stains and uneven corrosion. It is an object of the present invention to provide a method of translucent treatment of glass surfaces.

1 is a process flow chart showing a method of manufacturing a translucent glass of the present invention,

2 is a perspective view schematically showing a holder configuration for vertically stacking two sheets of glass according to the present invention;

3 is a cross-sectional view showing the irregularities of the plate glass according to the first embodiment according to the process conditions in the two-step etching process of the present invention,

4 is a cross-sectional view showing the irregularities of the plate glass according to the second embodiment according to the process conditions in the two-step etching process of the present invention,

5 is an electron micrograph of a semitransparent glass completed by the present invention,

6 is an electron micrograph of a semitransparent glass produced by a conventional etching method.

According to the present invention for achieving the above object,

In the method of manufacturing a translucent plate glass by etching the plate glass after the surface sanding process by sandblasting method,

A pre-treatment step for preventing chemical traces from remaining during the etching process, comprising: a water spraying step of spraying water so that the surface of the plate glass is soaked with water as a whole;

A first etching process of vertically immersing the plate glass after the spray cleaning process in a sedimentation tank containing a corrosion solution composition to grow irregularities on the surface of the plate glass;

A sludge removing step of washing with water to remove sludge from the surface of the plate glass after the first etching process;

A second etching step of immersing the finished glass in the sludge cleaning process in a precipitation tank containing a corrosion solution composition to regrow the unevenness while evenly treating the uneven particles grown in the first etching process;

Provided is a method of manufacturing a semi-transparent glass, characterized in that the sludge removal process of water cleaning to remove the sludge on the surface of the plate glass after the second etching process.

In the present invention described above, the precipitation tank of the first etching process and the second etching process is provided with an ultrasonic vibrator on the bottom surface to uniformly distribute the flow and concentration distribution of the corrosion solution composition in the precipitation tank.

In the present invention described above, the corrosion liquid composition used in the first etching process and the second etching process is 10-60% by weight of ammonium fluoride (NH4HF2), 0-25% by weight of phosphoric acid (H3PO4), boric acid (H2BO3) 0- 25 wt%, surfactant (H2O + glycerine) 30-60 wt%, enhancer 0-15 wt%.

In the present invention described above, the plate glass is placed vertically on the glass support in the state of overlapping the two sheets overlapping the packing between the two glass plates vertically added to each process while moving the glass support in a conveyor method. Characterized in that made.

With reference to the accompanying drawings of the present invention described above will be described in more detail.

1 is a process flow chart showing a method of manufacturing a translucent glass of the present invention,

2 is a perspective view schematically showing a glass support structure for vertically injecting two sheets of glass according to the present invention;

3 is a cross-sectional view showing the irregularities of the plate glass according to the first embodiment according to the process conditions in the two-step etching process of the present invention,

4 is a cross-sectional view showing the irregularities of the plate glass according to the second embodiment according to the process conditions in the two-step etching process of the present invention,

5 is an electron micrograph of a semitransparent glass completed by the present invention,

6 is an electron micrograph of a semitransparent glass produced by a conventional etching method.

Method for producing a semi-transparent glass of the present invention is a method for producing a semi-transparent plate glass by etching the plate glass after the surface sanding process by the sandblasting method, using the corrosion solution composition of Korean Patent Application No. 2002-70445 filed by the inventor of the present application It is a complex process used as an etching chemical. According to the previous application, the corrosive composition is 10-60% by weight of ammonium fluoride (NH4HF2), 0-25% by weight of phosphoric acid (H3PO4), 0-25% by weight of boric acid (H2BO3), and 30-60% by weight of surfactant (H2O + glycerine) , 0-15% by weight of the enhancer, the effect is the same as described in the prior application, so the description thereof is omitted.

Among the components of the corrosive composition, a corrosive composition having a lower cost and higher etching efficiency may be used by replacing hydrofluoric acid and ammonia instead of high toxic ammonium fluoride. This corrosive composition is 20-40% by weight of hydrofluoric acid (HF), 15-30% by weight of ammonia (NH3), 2-10% by weight of phosphoric acid (H3PO4), 2-10% by weight of methyl alcohol (CH3OH), distilled water (H2O) 30 -60% by weight, the effect is that by using the strong toxicity of hydrofluoric acid and ammonia, the raw material of ammonium fluoride can lower the cost of the corrosive composition and increase the etching rate due to strong toxicity.

Hereinafter, the plate glass manufacturing method of this invention is demonstrated in order.

First, by using a sandblasting method using a high-pressure nozzle injector using a sandblasting method is sprayed on one surface of the plate glass is supplied with a plate glass having a roughness of about 60-150 neck (mesh) as shown in Figure 1 The same process of the present invention. At this time, as shown in Figure 2 by laminating a rubber sheet 22 on the back of the two sheets of the glass plate 12 sandwiched around the lamination using a paper joint 24 to surround the glass support 26 The whole process is automatically performed by moving the conveyor 28 in a state where it is placed vertically.

As a first step step, as a pretreatment step for preventing chemical traces from remaining in the etching process, water is sprayed so that the surface of the plate glass is soaked with water as a whole.

In the second step, the wet glass plate 12 is vertically immersed in the settling tank 42 containing the corrosive composition 62 to perform the first etching step (S2) to grow the unevenness of the glass surface. At this time, the temperature of the corrosion liquid composition 62 is suitable 40-50 ℃ and 30-60 ℃ is possible.

Next, 1st sludge removal process S3 which removes the sludge of the surface of the plate glass 12 by water washing is performed. The process takes about 2-3 minutes.

The water application step (S1) and the first sludge removal step (S3) is a step of spraying water on the surface of the plate glass 12 by the spray method by the nozzle (51, 53) spray, may use steam, sludge And reservoirs 41,43 with water treatment facilities.

In the first etching step (S2), the melted particle component of the plate glass 12 is absorbed into the corrosion solution composition 62 by the corrosion solution composition 62, and in the first sludge removal step (S3), the first etching process ( The low viscosity sludge melted in S2) will fall off by water spray, and the high viscosity sludge will stick to the surface of the pane. This is the shape of the sludge remaining in the plate glass solidified in the first etching step (S2) is determined according to the etching conditions, such as the etching time and temperature and the concentration of the corrosive composition.

Subsequently, the plate glass 12 having completed the first sludge removing step S3 is immersed in the settling tank 44 containing the corrosive composition 64 while uniformly surface-treating the uneven particles grown in the first etching step S2. A second etching step (S4) for regrowth of unevenness is performed.

The 2nd sludge removal process S5 which removes the sludge of the surface of the plate glass 12 which finished the said 2nd etching process S4 by water washing is performed.

In the second sludge removal step S5 at this time, steam may also be used as a step of spraying water onto the surface of the plate glass 55 by spraying the nozzle 55 as in the first sludge removal step.

Ultrasonic vibrators 52 and 54 are provided on the bottom surface of the settling tank 42.44 of the first etching process and the second etching process, respectively. Ultrasonic waves by the ultrasonic vibrators 52 and 54 make the flow of the corrosive composition in the settling tank constant, so that the concentration distribution of the corrosive composition is even.

The depth and shape of the unevenness grown on the surface of the semi-transparent plate glass manufactured according to the process conditions of the first etching process (S2) and the second etching process (S4) of the present invention can be controlled differently.

First embodiment

In the first embodiment shown in FIG. 3, the plate glass cross section immediately after the sanding process is (a), the plate glass cross section after the first etching and sludge removing process (b), and the plate glass cross section after the second etching and sludge removing process ( C) is shown.

Referring to these drawings, the first and second etching processes (S2, S4) are carried out at a temperature of 40 ~ 50 ℃, the first etching process (S2) for 1 minute, the second etching process (S4) for about 3 minutes The sludge is uneven because the shape of the plate glass in the cross-section of the first etching process in the first etching process is high in viscosity, and the sludge of the plate glass particles has a high viscosity and finishes the first etching process in the course of flowing slowly into the acid of the unevenness. The depth of the unevenness 12b that has solidified while sticking to the acid of the finished first etching process is deeper than the depth of the unevenness 12a after sanding, and the sludge flows down the unevenness 12b which is deepened by the second etching process. As the time becomes longer, the mountains and grooves grow deeper into the unevenness 12c.

Second embodiment

In the second embodiment shown in FIG. 4, the plate glass cross section immediately after the sanding process is (a), the plate glass cross section after the first etching and sludge removing process (b), and the plate glass cross section after the second etching and sludge removing process ( C) is shown.

Referring to these drawings, the first and second etching processes (S2, S4) are performed at a temperature of 40 to 50 ° C., but the first etching process (S2) is performed for 3 minutes and the second etching process (S4) is performed for about 1 minute. During the process, the plate glass shape cross-sections the sludge of the plate glass particles corroded for a long time in the first etching process to flow with a lower viscosity than the first embodiment to fill the acid and grooves of the unevenness 12a. In this state, since the first etching process is completed, the depth of the unevenness 12b is solidified, and the acid of the unevenness 12a formed at the time of sanding is grown to a non-flat surface unevenness 12b having a low level, followed by a second etching process. Even in the first etching process, when the acid low surface of the unevenness 12b is etched, the sludge flows down while filling the low groove of the unevenness, so that the acid of the unevenness 12c grows in a very low state.

As described in the method of the two embodiments, by controlling the time of the two etching process in various ways, it is possible to control the growth pattern of the unevenness in various ways.

If necessary, a third etching step and a third sludge removing step may be added.

As shown in FIG. 5, the semi-transparent plate glass manufactured by the method of the present invention has a concave-convex shape of the semi-transparent surface of the plate glass on the electron micrograph to uniformly disperse the reflected light of light at various angles. It is also possible to prevent cracks on the glass surface.

On the other hand, as a comparative example of the present invention as shown in Figure 6, the plate glass prepared by the conventional etching method has an angular shape of the semi-transparent surface of the plate glass on the electron micrograph has an angular shape to reflect the reflected light of light at various angles It cannot be dispersed, and the groove portion of the unevenness becomes a crack-like shape, and the physical strength is weak compared with the translucent plate glass produced by the present invention shown in FIG.

As described above, according to the present invention, the growth pattern of the unevenness can be varied by time control while performing a complex process leading to a moisture coating step, a first etching step, a first sludge removal step, a second etching step, and a second sludge removal step. The shape can be controlled to adjust the reflectance of the light, the surface feel, the intensity, etc. Also, the process can be carried out while vertically injecting two sheets of glass into one holder, which is suitable for mass production of large quantities of glass.

Claims (7)

In the method of manufacturing a translucent plate glass by etching the plate glass after the surface sanding process by sandblasting method, A pre-treatment step for preventing chemical traces from remaining during the etching process, comprising: a water spraying step of spraying water so that the surface of the plate glass is soaked with water as a whole; A first etching step of vertically immersing the plate glass moistened by the moisture coating process in a precipitation tank containing a corrosion solution composition to grow irregularities on the surface of the plate glass; A first sludge removing step of removing sludge from the surface of the plate glass after the first etching step by water washing; A second etching step of immersing the finished glass in the sludge cleaning process in a precipitation tank containing a corrosion solution composition to regrow the unevenness while evenly treating the uneven particles grown in the first etching process; And a second sludge removing step of removing the sludge on the surface of the plate glass after the second etching step by washing with water. The method of claim 1, wherein an ultrasonic vibrator is provided at a bottom surface of the precipitation tank of the first etching process and the second etching process to uniform the flow and concentration distribution of the corrosion solution composition in the precipitation tank. According to claim 1, Corrosion liquid composition used in the first etching process and the second etching process is 10-60% by weight of ammonium fluoride (NH4HF2), 0-25% by weight of phosphoric acid (H3PO4), boric acid (H2BO3) 0-25 Method for producing a semi-transparent glass, characterized in that the weight percent, 30-60% by weight surfactant (H 2 O + glycerin), 0-15% by weight enhancer. According to claim 1, Corrosion liquid composition used in the first etching step and the second etching step is 20-40% by weight of hydrofluoric acid (HF), 15-30% by weight of ammonia (NH3), 2-10% by weight phosphoric acid (H3PO4) %, Methyl alcohol (CH3OH) 2-10% by weight, distilled water (H2O) 30-60% by weight of the manufacturing method of the semi-transparent glass. The method of claim 1, wherein the plate glass is made by vertically inserting two sheets of glass overlapped with each of the etching process and the sludge removal process while moving the holder in a conveyor manner by using a holder that overlaps two sheets with a packing therebetween. Method for producing a translucent glass, characterized in that. The semi-transparent glass according to any one of claims 3 to 4, wherein the first etching process is performed at 30-60 ° C for 120-240 seconds, and the second etching process is performed at 30-60 ° C for 40-80 seconds. A method for producing a semi-transparent glass, characterized by growing the depth of concavities and convexities. The unevenness of the translucent glass according to any one of claims 3 and 4, wherein the first etching process is performed at 30-60 ° C for 40-80 seconds, and the second etching process is performed at 30-60 ° C for 120-240 seconds. A method for producing a semi-transparent glass, characterized in that to grow deep and high depth.