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About glass

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Float glass
May 12, 2017

Product advantages

It is in the tin tank, the glass floating on the surface of tin liquid out. Therefore, this glass is first flat and good, no water ripples.

For the mirror, car glass. Do not face, do not take shape, which is a major advantage.

Followed by the float glass selection of ore quartz sand, good raw materials. Produced by the glass pure, transparent and good. Bright, colorless. No glass boil, bubbles and the like.

The third is the structure of close, heavy, feel smooth, the same thickness per square meter than the plate than the big, good cutting, easy to break.

The country more than 200 production lines are in strict accordance with national standards of production, this glass is the best glass of civil construction. Its price, compared to the same thickness, only 4 yuan per square meter than the flat glass.


Production Process

The process of forming the float glass is done in the tin bath into the protective gas (N2 and H2). The molten glass flows continuously from the kiln and floats on the surface of the tin liquid with relatively large density. Under the action of gravity and surface tension, the molten glass is spread on the tin liquid surface and flattened to form the upper and lower surfaces, harden and cool After being cited as a transition roll table. Roller table roller rotation, the glass out of the tin into the annealing furnace into the furnace, the annealing, cutting, to get the float glass products. Float and other molding methods, the advantages are: suitable for high-quality manufacturing of high quality flat glass, such as no wave tendons, uniform thickness, the upper and lower surface smooth, parallel to each other; the scale of the production line is not limited by the forming method, Low cost; high utilization of finished products; easy scientific management and full mechanization, automation, high labor productivity; continuous operation cycle can be up to several years, is conducive to stable production; for the production of some new varieties to provide suitable conditions, such as Electric float glass, annealing glass coating, cold end surface treatment.

Single-chip float glass sound insulation performance is poor, the merits of its performance according to GB / T8485-2002 "building outside the window air insulation performance classification and testing methods" and GBJ75-1984 "building noise measurement specifications", and with reference to the international Standard ISO140 and ISO717 on the sound insulation performance of the identification, the use of weighted sound insulation Rw to measure sound insulation performance indicators, the unit is dB; another sound insulation performance indicators STC can be used as a reference index.

Features

For the float glass, the thickness of the uniformity is better, the transparency of its products is relatively strong, so after the tin surface treatment, relatively smooth, in the smooth role of the flame and polishing under the action of the formation of a surface Neat, flatness is relatively good, relatively strong optical performance of the glass, this float glass is particularly good decorative characteristics, but also has a good transparency, clarity, purity, and indoor light and other characteristics of light, wide field of vision Performance, but also with the construction of doors and windows, natural lighting materials, the best choice for materials, it is one of the most widely used building materials, it can be said that in the architectural glass of various types of view, this float glass application of the largest , Is one of the most important original films for deep processing of glass. Ultra-white float glass to clarity of transparency as the main characteristics of the best.

Differences in editing

What is the difference between ordinary flat glass and float glass?

A: ordinary flat glass and float glass are flat glass. Just the production process, the quality is different.

Ordinary flat glass is made of quartz sandstone powder, silica sand, potassium fossil, soda ash, Glauber's salt and other raw materials, according to a certain proportion of preparation, melting through the melting furnace, through vertical drawing method or flat pull method, calendering produced by the transparent colorless plate glass. Ordinary flat glass by the appearance of quality is divided into special products, first-class goods, second-class three categories. According to the nominal thickness of 2,3,4,5,6,8,10,12,15,19,22,25 mm total of 12 kinds of specifications. (See "flat glass" GB11614-2009)

B: Float glass is made of sea sand, quartz sandstone powder, soda ash, dolomite and other raw materials, according to a certain proportion of preparation, melting through the melting furnace, glass from the kiln continuous flow and floating on the metal surface, Uniform thickness of the flat, the fire polished glass belt, after cooling hardening from the metal liquid, and then cut by cutting the transparent colorless glass plate. The glass surface is particularly smooth and smooth, the thickness is very uniform, the optical distortion is very small. Float glass according to the appearance of quality is divided into excellent products, a product, qualified three categories. According to the thickness of 3,4,5,6,8,10,12,15,19 mm nine kinds.

C: ordinary flat glass appearance quality level is based on wave tendons, bubbles, scratches, sand, pimple, line and other defects and determine the number of defects. Float glass appearance quality level is based on optical deformation, bubbles, inclusions, scratches, lines, fog and other defects to judge.

D: ordinary glass, emerald green, fragile, transparency is not high, rain and rain easily aging deformation.

Float glass, transparent float glass is the glass paste through the control gate into the tin tank, due to gravity and its surface tension floating on the surface of the molten tin, and then into the Xu cold groove, so that both sides of the glass smooth and smooth, ripple disappeared production. Dark green, smooth surface without ripples, good perspective, with a certain toughness.

E: Float glass and ordinary glass production process is different from the advantages of the surface is hard, smooth, smooth, float glass side to see the color and the general glass is different, white, reflective objects without distortion, and the general watermark The deformation


Mildew

Glass mold has been an industry problem, glass moldy (ie, anti-alkali) chemical reaction, change the glass surface properties, in the sunlight under the surface of the rainbow, mold point, watermark, mimeograph, paper and other phenomena.

Glass molds appear in the production and storage process, the mold after the glass products will lose their luster, loss of transparency, showing rainbow, white or patch phenomenon (not easy to separate), etc., seriously affected the quality of float glass products, resulting in Glass enterprises in the downstream customers in the image greatly reduced, but also affected the finished product price. Especially in the current glass sales market downturn in the case, so that enterprises continue to maintain a strong competition in the important initiative is to further improve the quality of glass, the maximum glass to reduce the mold caused by the rate of scrap and reduce production costs [1].

Therefore, the choice of a good anti-mildew products is particularly important. At present, the glass moldy protection mainly mildew mold mildew, paper mold mildew, mildew mold mildew three categories. These three kinds of products in the best mold powder, is a nano-polymer materials, with environmental protection, efficient, easy to clean and so on. Which imports of mildew powder with its high quality materials and strict production requirements have been concerned about the glass business, but its high prices so that glass enterprises daunting, a serious increase in costs, has been unable to meet the current business needs to promote cost savings. In recent years, the rise of domestic anti-mildew powder is to make up for this deficiency, the price of imports accounted for only 1/3, the quality of some of the company's products have reached or even higher than the international level, in full compliance with domestic glass production needs, With the increasing value of glass products, the use of anti-mildew products are also more and more attention. Response to the development of high-end glass market, the glass, but also a new generation of "coconut shell" class of mildew products, greatly improving the effectiveness of glass mold isolation and cleaning and so on. At present, such coconut shell mold has been the only domestic anti-mildew powder with independent intellectual property rights of the company's successful research and development, and gradually successfully pushed to high-end glass production enterprises. And for the paper mold, although the operation is simple, good anti-mildew effect, recyclable, but because of its high cost, easy to produce a long time to send paper and other shortcomings, powder products gradually replaced. And anti-mildew liquid products are still not mature enough, the market utilization rate is not high, too long lead to cleaning is not clean and so on.

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