Hongshun Kitchenware

2022.09.26

The difference between tempered glass and tempered glass lies in the difference in strength and performance. Tempered glass refers to tempered glass, which has good mechanical properties and thermal shock resistance; while tempered glass refers to flat glass that has been tempered by flame and has high compression resistance. The strength of tempered glass is not very good, it is easy to break, and the fragments are easy to hurt people. The strength of tempered glass is very good. It is a kind of glass that has been strengthened and is not easy to break. Even if it is accidentally broken, the fragments are all connected together. Generally speaking, tempered glass is better than semi-tempered glass, and tempered glass is basically used in daily households.

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2022.09.26

Chemically tempered glass is mainly made of glass with a thickness of less than 3mm. It is heated to about 420 degrees Celsius with a high-purity potassium nitrate solution and a matching catalyst. The potassium ions and sodium ions on the surface of the glass structure undergo ion exchange to form a strengthening layer. Due to the slow exchange rate of potassium and sodium ions, in order to make the glass have a large stress value and a thickness of the stress layer that meets the requirements of use, the exchange time varies from 4 hours to 10 hours. The depth of the compressive stress layer of chemically tempered glass generally ranges from 5um to 25um, but Corning's Gorilla Glass and AGC's Dragon Trace Glass can increase the stress layer to 50um. The bending strength can reach 600-800mpa. White sheet finished product—QC inspection—cleaning treatment—chemical strengthening—insulation and cooling—cleaning and drying—packaging. Main test methods for the strength of chemically strengthened glass a, flexural strength of glass (CL) b, impact strength of glass (CT) c, depth of compressive stress layer of glass (DOL) Method 1. Impact strength test of glass with steel ball - falling ball crushability test Method 2, static pressure test method. Use the thimble to increase the pressure at the center of the glass until the pressure value at the moment when the glass is broken. Method 3. Compressive stress layer depth test method---quantitatively measure the glass surface with a compressive stress tester, and calculate the pressure layer depth on the glass surface.

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2022.09.26

Tempered glass is obtained by first cutting ordinary annealed glass to the required size, then heating it to about 700 degrees close to the softening point, and then rapidly and uniformly cooling it (usually 5-6MM glass is heated at a high temperature of 700 degrees for about 240 seconds, Cool down for about 150 seconds. 8-10MM glass is heated at a high temperature of 700 degrees for about 500 seconds, and cooled for about 300 seconds. In short, according to the thickness of the glass, the time for heating and cooling is also different). After tempering, uniform compressive stress is formed on the surface of the glass, while tensile stress is formed inside, which improves the bending and impact strength of the glass, and its strength is about four times that of ordinary annealed glass. The tempered glass that has been tempered cannot be cut, ground, etc. or damaged, otherwise it will be "shattered" due to the destruction of the uniform compressive stress balance.

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2022.09.26

By shape 1. Tempered glass is divided into flat tempered glass and curved tempered glass according to shape.

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2022.09.26

Ordinary glass tableware is not completely reliable. In a specific environment that is immersed in water for a long time, it will produce a "mold" phenomenon. This is because the glass is eroded by water for a long time, and the sodium silicate in the glass reacts with carbon dioxide in the air to form white carbonic acid crystals, which are harmful to human health. The way to get rid of these carbonic acid crystals is to wash them with alkaline detergents. Although ordinary glass may also contain trace amounts of lead, it is not harmful to health under normal use. If you are worried, soak ordinary glass tableware in vinegar water before use to make the lead precipitate out. For acidic beverages or food, use ordinary glassware and try to avoid lead-containing glassware.

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2022.09.26

There are various production processes for color flat glass. For body-colored flat glass, float method and flat drawing process and casting calendering process are mainly used at present. Float and levelling Float and flat glass are the main production processes of flat glass, and they are also the main production methods of color flat glass. We mix the colorant and glass raw materials evenly, and then send them to the glass tank kiln through a feeder for melting, clarification, molding, etc. The process obtains colored flat glass. Since colored glass is different from ordinary flat glass, the melting system and annealing process should be different from ordinary flat glass. In addition, some transition glass will be produced during the production and conversion of colored glass. Color change in glass production In the flat glass production line, the conversion production of colored glass mainly adopts the "production process refueling method". The method is: according to the color uniformity and quality requirements of good products, without affecting production, put the newly composed batch into the original glass liquid, so as to gradually replace and change the color of the glass in the shortest possible time. Convert to another color. Generally, it takes 6-14 days for all the molten glass in the whole kiln to be converted into the newly composed molten glass. The time is related to the time that the molten glass stays in the kiln, that is, the ratio of the total capacity of the molten glass in the kiln to the production certificate; it is also related to the amount of colorant added. Practice has proved that the speed of glass coloring conversion is not only related to the unique glass flow of each kiln, but also depends on the coefficient of blending excess colorant, which is generally 2-3 times the amount of standard colorant. Since changing the addition amount of the colorant has little effect on the composition of the base glass, the blending excess coefficient of the colorant can be adjusted within a wide range. The greater the amount of colorant added, the faster the colorant content in the finished glass rises, and the faster the glass is colored. The colorant content Cx in the glass is expressed by the following formula. Cx=T×Co/R(B)/Tr In the formula, T is the coloring time, hours; C. is the design content of colorant in the finished glass; R(B) is the coefficient related to the blending excess coefficient B; Tr is the ratio of the production capacity of the kiln to the off-duty output. According to production experience, the relationship between B and R(B) is as follows. If B is too large, it will cause difficulty in melting at the front end of the glass melting furnace, so B is usually not greater than 5: B=l,R(B)=2; B=2,R(B)=0.1; B=3,R(B)=0.4; B=4, R(B)=0.3. Among them, T, is a ratio, which is equivalent to the average time that the molten glass stays in the kiln. For a 400t/d float glass production line, if the total volume of molten glass in the kiln is 2400t, Tr=2400/400=6 days. In addition, if starting coloring with the blending excess coefficient B, the entire glass kiln already contains the same glass colorant components uniformly, and the colorant-related components in the finished glass have reached Cy, then Cx=T×Co/R( The formula B)/Tr+Cy is the estimation formula for the coloring rate of float glass.

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