TW201908261A - Coating method for functional coating layer of energy-saving glass capable of manufacturing multiple pieces of glasses at one time with requiring high apparatus cost - Google Patents

Abstract

Disclosed is a coating method for functional coating layer of energy-saving glass, which includes: a step A of washing and drying, in which the glass under processing is cleaned and dried; a step B of coating, in which a functional layer is coated onto the surface of the glass by using an ultrasonic spraying method, wherein the vibration frequency of the ultrasonic sprayer used is between 20kHz and 130kHz; a step C of coating, in which the coated functional layer is cured and shaped onto the surface of the glass; a step D of quality inspection, in which the thickness of the functional layer and the uniformity of the coating are inspected so as to determine the finished products which satisfy the inspection values.

Description

 Coating method for energy-saving glass functional coating  

The invention relates to a processing process of a glass surface coating, in particular to a coating method of an energy-saving glass functional coating.

With the coating or attaching of different materials on the surface of the glass, the glass can have various functions and characteristics, such as anti-UV coating, anti-infrared coating, antibacterial coating or scratch-resistant coating, etc., especially energy-saving glass. In the application, that is, the surface of the glass is coated with anti-ultraviolet and anti-infrared rays, because it can protect the sunscreen and avoid the penetration of heat, and the energy-saving effect is achieved. Therefore, the functional glass is also widely known as energy-saving glass. use.

The thermal insulation data of glass is based on Shading Coefficient (SC) and U-Value (U). SC measures radiant heat, and U value measures conduction heat. The lower the two values, the better.

The surface functional layer (such as anti-UV coating and anti-infrared coating) of the commercially available functional glass can be divided into hard plating and soft plating (especially, light-shielding insulating glass), hard plating. The main method is to set the functional layer to the surface of the glass by means of thermal dissolution, the U value is about 1.84 W/m ² K, and the SC value is about 0.78. The advantage of this method is low cost and easy processing, which can be directly carried out on the production line of the original glass sheet, but can only be manufactured in a single piece and can only be single-sided. The soft plating method is to place the functional layer on the surface of the glass by vacuum sputtering, and the U value is about 1.4 W/m ² K, and the SC value is about 0-52. The advantage of this method is that it can be manufactured in multiple pieces at one time and can be double-sided, but the disadvantage is that the equipment cost is too high because vacuum equipment is required. Generally, a production line requires about 200 million yuan of cost, and it cannot be used in the original glass sheet. Directly on the production line.

The object of the present invention is to provide a coating method for an energy-saving glass functional coating, which can be suitable for manufacturing a plurality of sheets at one time without requiring too high equipment cost.

In order to achieve the above object, the present invention provides a coating method for an energy-saving glass functional coating, comprising: step A, cleaning and drying, and cleaning and drying the glass to be processed. In step B, the functional layer is coated on the glass surface by ultrasonic coating, and the ultrasonic nozzle used has a vibration frequency of 20 kHz to 130 kHz. Step C, styling, allows the coated functional layer to be cured and shaped on the surface of the glass. Step D, property detection, thickness of the functional layer and detection of coating uniformity, if the value is detected, it is the finished product, and if it is not the detection value, the scraping function layer is recoated.

Figure 1 is a flow chart of the present invention.

Fig. 2 is a flow chart showing the manufacture of the laminated glass of the present invention.

The coating method of the energy-saving glass functional coating of the invention is as follows:

In step A, washing and drying, the glass to be processed is cleaned to remove oil stains and impurities on the surface of the glass, and then dried to remove moisture during washing.

In step B, the functional layer is coated on the glass surface by ultrasonic coating, and the ultrasonic nozzle used has a vibration frequency of 20 kHz to 130 kHz, and the spray atomization angle of the nozzle is 20 to 80 degrees, and the droplet size is 10 ~80μm. Because the material properties of the coated functional layer are different, the corresponding ultrasonic nozzle vibration frequency used, the spray atomization angle of the nozzle, and the droplet size formed will also differ. In this embodiment, the anti-ultraviolet and anti-infrared coating is applied as an example, but not limited thereto, the ultrasonic nozzle used in the embodiment has a vibration frequency of 60 kHz, and the spray atomization angle of the nozzle is 70 degrees. The droplet size formed was 33 μm. The same coating method can also be used to apply functional layers with different functions such as anti-ultraviolet layer, antibacterial coating or scratch-resistant coating, but the functional properties of different functional functional layers will be different, so the ultrasonic nozzle The frequency of the vibration, the angle of atomization of the nozzle, and the size of the droplet formed will also vary.

Step C, shaping, so that the applied functional layer can be solidified and shaped on the surface of the glass, and different styling methods are used depending on the type of the functional layer to be applied, if the functional layer is coated with a UV dosage form Then, it is shaped by ultraviolet irradiation, and if the functional layer is coated with a thermosetting type, it is shaped by heating and baking. The anti-ultraviolet and anti-infrared coatings in this embodiment are shaped by heat baking.

Step D, property detection, thickness of the functional layer and detection of coating uniformity, if the value is detected, it is the finished product, and if it is not the detection value, the scraping function layer is recoated. In this embodiment, the thickness of the functional layer and the uniformity of the coating are detected in a manner of detecting the transmittance, but not limited thereto, the different material properties used in the functional layer must be combined with different detection methods.

The functional glass formed by the above coating method can achieve the effects listed in the following table by coating an ultraviolet-resistant and infrared-resistant layer. (Detecting glass thickness is 6mm)

The single-layer glass in the above table refers to a coating on one side of a single layer of glass coated with an anti-ultraviolet and infrared coating, and the laminated glass is a space between two sheets of glass, which may have air or an inert gas. Or vacuum, one side of each of the two glasses is coated with an anti-UV and infrared coating. As can be seen from the comparative values listed in the above table, the functional glass produced by the method of the present invention has a U value of about 1.4 to 2.65 W/m ² K and an SC value of about 0.45. It has better UV and infrared protection.

In the method of the present invention, in addition to being made into a single piece of glass, a laminated glass can also be produced by adding a step E after the step D of the foregoing embodiment. The combination is also coated with anti-UV and anti-infrared. For example, in the case of a single-layer glass, two sheets of the single-piece glass prepared in the previous embodiment are taken, and the two glasses are respectively disposed on both sides of a frame, so that the frame is sandwiched between the two glasses. The two glasses may be filled with an inert gas or evacuated or simply filled with normal air and are generally at a gas pressure (atmospheric pressure). The laminated glass produced by this method has good ultraviolet and heat insulating effects.

Claims (10)

 The invention relates to a coating method for an energy-saving glass functional coating, which comprises: step A, cleaning and drying, cleaning the glass to be processed to remove oil stains and impurities on the surface of the glass, and then drying; step B, super The sonic coating method is applied to the surface of the glass, and the ultrasonic nozzle used has a vibration frequency of 20 kHz to 130 kHz; in step C, the shaped functional layer can be solidified and shaped on the surface of the glass; D, the nature of the test, the thickness of the functional layer and the detection of the uniformity of the coating, the value of the test is the finished product, if it is not the value of the test, the scraping function layer is recoated.    According to the coating method of the energy-saving glass functional coating according to Item 1 of the patent application scope, the spray nozzle used in the step B ultrasonic coating has a spray atomization angle of 20 to 80 degrees.    The coating method of the energy-saving glass functional coating according to Item 1 of the patent application, wherein the droplet size formed by the step B ultrasonic coating is 10 to 80 μm.    According to the coating method of the energy-saving glass functional coating according to Item 2 of the patent application scope, the droplet size formed by the step B ultrasonic coating is 10 to 80 μm.    The coating method of the energy-saving glass functional coating according to Item 1 of the patent application, wherein the curing method used in the step C is a heat baking curing setting.    The coating method of the energy-saving glass functional coating according to the fourth aspect of the patent application, wherein the curing method used in the step C is a heat baking curing setting.    The coating method of the energy-saving glass functional coating according to claim 1, wherein the curing method used in the step C is UV irradiation.    The coating method of the energy-saving glass functional coating according to Item 4 of the patent application scope, wherein the curing method used in the step C is UV irradiation setting.    According to the coating method of the energy-saving glass functional coating according to the first aspect of the patent application, there is further included a step E, taking two pieces of the single-piece glass prepared in the foregoing embodiment, and setting the two glasses to one The sides of the frame are such that the frame is sandwiched by the two glasses.    The coating method of the energy-saving glass functional coating according to claim 9 , wherein the two glasses are filled with an inert gas.