KR101139616B1 - Manufacturing method of high strength safety glass - Google Patents

Abstract

The present invention relates to a method for manufacturing high strength safety glass, which improves the breakage strength of glass by coating a liquid resin on a surface of a glass product having various shapes and then curing it, and provides a high strength safety glass having less glass scattering even if the glass is broken. can do.

To this end, the liquid resin of the present invention includes a material having high strength and surface hardness, chemical resistance, heat resistance, and light resistance, and having good adhesion to glass after curing, and high light transmittance and whiteness.

According to the present invention, by using the coating method, it is possible to produce a glass product having a curved shape or a complex shape, and to improve safety by preventing scattering of debris during breakage while exhibiting high strength.

Safety glass, liquid resin, coating

Description

Manufacturing method of high strength safety glass

The present invention relates to a method of manufacturing high strength safety glass that can be used safely by improving the strength of curved or complex shaped glass products, preventing breakage, and preventing scattering of glass during breakage.

Glass is transparent, chemically stable, and excellent in surface hardness and strength compared to general plastic products, and is widely used in various fields such as window glass and container glass of buildings or automobiles.

In addition, various colors and patterns are added to the glass surface by printing and coating methods to improve aesthetics of the product or to spread the application to interior materials.

Recently, many home appliances such as washing machines, refrigerators, and air conditioners have been developed using glass materials to decorate the exterior of the product to enhance the design and value of the product as well as to improve the function.

However, the glass is brittle and can be easily broken by an external impact. As the fragments are sharply broken and some of the fragments are scattered, this causes a safety problem.

In order to secure this, some laminated glass products have been developed to improve the strength by processing the glass by a method such as air cooling or chemical strengthening, and to reinforce the strength by inserting a film or the like between the glasses.

However, in the case of laminated glass products, it is difficult to apply the reinforcement technology to glass products having a curved surface or a complicated shape that is not flat, and also difficult to attach a film to prevent scattering.

In addition, when tempered glass is used to reinforce strength, the glass fragments are scattered away due to the stress release inside the glass in case of breakage, which creates another safety problem.

Accordingly, there is a need for a method of manufacturing a safe glass that can ensure the strength of the curved surface or glass of complex shape and at the same time prevent the scattering of debris in case of breakage.

The present invention is to provide a high-strength safety glass manufacturing method to improve the breakage strength by reducing the surface of the glass formed in various shapes by coating with a liquid resin to solve the problems of the prior art, and less glass scattering when broken. There is this.

The object of the present invention is not limited to the above-mentioned object, other objects and advantages of the present invention that are not mentioned can be understood by the following description, will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In the high strength safety glass manufacturing method of the present invention in order to achieve the above object, wetting (wetting) is easily made on the glass surface, has high strength and surface hardness, good adhesion with the glass after curing, high light transmittance A liquid resin exhibiting a whiteness is coated on the surface of the glass and cured with ultraviolet rays or heat to produce a high strength safety glass which is a composite material in which the glass and the liquid resin are integrated.

According to the present invention, in a method of safely manufacturing glass of various shapes, the curved surface or glass of various shapes may be coated with a liquid resin and cured to produce safe glass having low fragmentation when glass is broken at high strength.

In the present invention, the liquid resin comprises any one selected from epoxy, acrylic, polyester, and melanin, and the curing agent of any one selected from polyamine, polyamide, and polysulfide It may include.

In the present invention, the liquid resin may be formed, including 30% or more and 60% or less of the curing agent based on 100% of the resin.

In the present invention, the method of coating the glass with a liquid resin may use any one method selected from a immersion method or a spray method.

The method for curing the coated glass in the present invention may use a thermal curing or ultraviolet curing method.

According to the present invention, the glass is coated with a liquid resin having good adhesion to glass after curing, and having high strength, high surface hardness, chemical resistance, heat resistance, and light resistance, thereby improving the breakage strength of the glass and simultaneously It prevents the scattering of debris at the time of breakage, thereby improving the safety of glass products.

In addition, the present invention has the effect of producing a glass product of a curved surface or a complex shape, such as the glass door of the drum washing machine or the front cover of the air conditioner by coating the liquid resin on the glass.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flow chart illustrating a method of manufacturing a high strength safety glass according to an embodiment of the present invention.

Referring to Figure 1, the high strength safety glass may be formed through the step S100 to S180.

S100 is a step of preparing a raw material of the glass in order to manufacture the safety glass, as is generally known, glass is made of natural minerals as a raw material.

More specifically, the raw material of glass is silica or silica sand as a base, and raw materials such as soda ash, limestone, dolomite, feldspar, manganese, borax or boric acid, magnesite, fluorite, iron oxide, and graphite / carbon black are used as base materials. Can be used additionally.

In step S110, when the raw material of the glass used in the safety glass to be manufactured by the step S100 is determined, the chemical composition ratio of each raw material is calculated and melted at a high temperature according to the use of the glass to be used.

At this time, the melting temperature is 1500 ℃ or more, after melting, each raw material is mixed to form a homogeneous glass.

Step S120 forms the molten glass to suit the purpose. Molding is made of various shapes and methods according to the type and use of the product, the molding temperature is from 900 ℃ to 1200 ℃.

In particular, the present invention can be manufactured in a variety of shapes, such as circular, elliptical, square, rectangular, curved surface complex shape to produce a safety glass suitable for the use of the product.

Step S130 is to produce a glass product by cooling the molded glass, the cooling method may be selected from the slow cooling method and quenching method.

Slow cooling is a process for producing a glass product that is not easily broken during the cooling process by gradually cooling the molded glass to distribute the uniform stress inside the glass, it can be cooled to a temperature of preferably 300 ℃ ~ 700 ℃.

In the quenching method, the glass formed by the air-cooled tempered glass manufacturing process may be instantaneously cooled (quenched) to form a compressive stress on the glass surface to reinforce the strength.

Step S100 to S130 is a process for manufacturing a common glass, the process of applying the liquid resin after the step S140 for the high strength safety glass of the present invention is important.

Step S140 and S150 is a step of forming a liquid resin, the liquid resin may be formed of a resin and a curing agent to cure it, the mixing ratio of the resin and the curing agent may be formed in the resin 100 in the curing agent 30 to 60 ratio.

In more detail, the resin may be formed of epoxy, acrylic, polyester, melanin, or the like, and the curing agent may be polyamine or polyamide. System, polysulfide system, or the like. This is not limited to the present invention, any material that satisfies the liquid resin conditions described later can be used.

Step S160 is a process of coating the liquid resin formed by the steps S140 and S150 to the glass formed in step S140, immersing the glass in a liquid resin solution (Dipping method), or using a spray gun to the liquid resin surface (Spraying) can be sprayed on.

In this case, the surface of the glass may be cleaned to remove foreign substances on the surface of the glass and then coated with a liquid resin, and the viscosity of the liquid resin may be controlled by adjusting the mixing ratio of the resin and the curing agent and the amount of additives such as a thickener.

In addition, the present invention is not limited to the present invention, but when the immersion method is used, the glass may be immersed in the liquid resin solution for 10 to 60 seconds, which may coat a resin film film having a predetermined thickness on the glass surface.

At this time, the thickness of the resin film film can be adjusted according to the required strength and other properties, but not limited to the present invention, the thickness of the resin film film is preferably formed to 0.01 ~ 1mm.

Step S170 is to cure the glass coated with the liquid resin to dry at a temperature of 20 ℃ ~ 100 ℃, or to cure the liquid resin using an ultraviolet irradiation device to complete a glass product showing the user desired form depending on the application There is (S180).

Hereinafter, look at the conditions and experimental examples that the liquid resin used in the present invention must be satisfied.

There are four conditions that must be satisfied with the liquid resin. First, wetting should be easy on the glass surface, and the adhesion after curing should be good.

More specifically, when coating resin on glass surface by immersion method or spray method, it should have proper viscosity and dispersibility so that film can be formed uniformly on glass surface, and high adhesion so that it is not easily separated from glass after curing. It should have the property that the glass fragments do not fall off from the resin film even when the glass is broken.

Second, it must have high strength and surface hardness.

More specifically, since the purpose of the present invention is to strengthen the strength and prevent the shattering of glass fragments to prevent breakage, the cured resin must have sufficient tensile strength to exhibit the reinforcing effect. Particularly, in case of a product such as a washing machine, there must be sufficient strength to withstand continuous vibrations and impacts during the operation of the product, and a resin that does not easily scratch due to high surface hardness of the cured resin should be used.

Third, it should have high light transmittance and whiteness after curing.

This is because the purpose is to serve as a window for observing the inside of the product or to highlight the decoration on the back of the glass. Therefore, when the transparency of the glass is reduced or the whiteness is low after the application of the liquid resin, the original function is lost. It should show high whiteness while maintaining maximum transmittance of glass.

Fourth, it must have chemical resistance, heat resistance, and light resistance.

In the case of the washing machine glass, the use of alkaline detergent and the increase of temperature during drying function require chemical resistance and heat resistance, and the resin should not be discolored or modified even when exposed to light for a long time.

In addition, it has a light index of refraction similar to that of glass, so that the decrease in transparency and the deformation of the transmission phase due to the difference in refractive index should be minimized.

Experimental Example 1

When the safety glass produced through the above steps S100 ~ S180 may be referred to FIG. 2 as a photograph of an experiment of scattering of glass fragments.

Experimental Example 2

The coating conditions of the resin were changed as shown in Table 1 below to test the strength by the liquid resin coating, the change in transmittance before and after the liquid resin coating, and the transmittance by wavelength before and after the liquid resin coating.

The experimental results show that the strength due to the liquid resin coating increases the fracture bending strength by 16 to 44% compared to the uncoated glass (No. 1) as shown in FIG. 3A (about 40% when coating a thickness of 0.06 to 0.07 mm). Able to know.

In addition, the transmittance change before and after the liquid resin coating can be confirmed that the transmittance change of the coating product within 3% compared to the uncoated glass (No. 1), as shown in Figure 3b, the transmittance by wavelength before and after the liquid resin coating is As shown in 3c, the change in visible light transmittance of the coated product compared to the uncoated glass (No. 1) is almost no difference for each wavelength.

Experimental Example 3

After mixing the polyamine-based curing agent 400g to 1000g of the liquid epoxy resin and stirred at about 20 ~ 50 ℃ to prepare a mixed solution, the glass is coated in a mixed solution at a rate of 10 ~ 100cm / min and dried.

Viscosity of the coating solution was 70 ~ 150 poise according to the stirring temperature, the higher the stirring temperature showed a lower viscosity value.

The coating thickness of the resin was changed to 0.04 ~ 0.12mm depending on the coating speed, the drying after coating was carried out at a temperature of 20 ~ 100 ℃ in a dryer for drying at room temperature, or if necessary to shorten the curing time.

After the drying, the fracture strength of the fully cured glass product was measured by the universal testing machine. The average strength value of the uncoated glass was 6.21 kgf, but the average strength value of the coated product was 7.2 ~ 9.0 kgf. The thicker the higher the value. The strength value of the specimen having a coating thickness of about 0.06 to 0.07 mm showed a strength increase of about 40% or more compared to that of the uncoated glass alone.

In addition, as a result of measuring the visible light transmittance of the coated glass using a UV-Spectrometer, a slight decrease in transmittance (within 3%) occurred due to the resin coating, compared to 90.8% of the uncoated glass alone, but it was higher than 88%. Since the transmittance value was maintained, it was judged that there was no particular problem in application.

The present invention can be used for curved or complex shaped glass articles.

1 is a flow chart showing a method of manufacturing a high-strength safety glass according to an embodiment of the present invention.

Figure 2 is a photograph showing the glass fragments scattered upon breakage of the high strength safety glass according to an embodiment of the present invention.

3A to 3C are graphs showing strengths of liquid resin coatings, changes in transmittance before and after coating liquid resins, and transmittances before and after coating liquid resins according to coating conditions of resins according to an embodiment of the present invention; .

Claims (8)

In the method of safely manufacturing glass of various shapes, Curing glass or curved glass with liquid resin The liquid resin includes a melanin-based resin and a curing agent for curing the melanin-based resin, the coating thickness of the liquid resin is 0.06mm ~ 0.12mm manufacturing method of high strength safety glass. The method of claim 1, wherein the curing agent is any one selected from polyamines, polyamides, and polysulfides. The method of claim 2, wherein the liquid resin, The high strength safety glass manufacturing method characterized in that it comprises a 30% or more to 60% or less of the curing agent based on 100% of the resin. The method of claim 1, wherein the glass is coated with a liquid resin. A high strength safety glass manufacturing method characterized by using any one selected from the immersion method or spray method. The method of claim 1, wherein the glass coated with the liquid resin is cured using heat or ultraviolet rays. delete The glass of claim 1, wherein the glass coated with the liquid resin High-strength safety glass manufacturing method characterized in that the visible light transmittance is 80% or more. The high-strength safety glass manufactured by the manufacturing method of any one of Claims 1-5 and 7 which prevents the scattering of glass fragments at the time of glass breakage.

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