Some Questions for Glass Industry

1.Why the glass is transparent?

As the chemical bond for ordinary phosphate, borate, silicate can be quite large, and the absorption excited by the electron is in the UV region while in the visible and near infrared generally no light absorption, therefore, the glass is with no color.

At the same time, the glass molecules are macroscopically homogeneous, there is no particles that can cause light scattering, and the glass surface is smooth and does not cause light scattering, so the glass is transparent.

2.What are the advantages of float glass compared to ordinary glass?

◎Float glass has high flatness and good transparency.

◎Float glass is automatic production, with higher production efficiency.

◎Float glass is with good quality and high glass utilization.

3.Why the glass should be annealing, what the impact on glass if the annealing is not good?

◎The purpose of annealing is to maximize eliminate the residual stress in the glass products; Eliminate the uniform optical and stable internal structure.

◎The glass will increase the brittleness and east to break if the annealing is not good.

4.How to produce colored glass?

◎Mixed the ingredients with metal pigment

◎Change the temperature in the furnace to affecting the elements in the raw materials, eg. Fe2+ into Fe3+

5.What is the function of broken glass in the production of raw materials?

How about the requirements for adding broken glass?

The broken glass play the role in catalytic, can reduce the production temperature as need to reduce energy consumption and improve production efficiency. The addition of broken glass can only be unprocessed bright plate glass, cannot be palette glass, tempered glass, coated glass and other deep processing glass.

6.How to judge the advantages and disadvantages of float glass?

◎ Flatness

◎ Transparency

◎ whether have color difference or not

◎ With or without impurities, bubbles and so on

7.The use of semi-tempered glass?

Building does not involve personal safety, but need to install tempered glass to improve the wind pressure and explosion resistance, and can not endanger personal safety.

8.Will it speed up the bleaching of glass if filling of the SO2 in the steel furnace?

No, it will not. Even if the filling of SO2 produce NiS impurities will only appear in the glass surface, and glass blew is mainly due to NiS impurities in the center of the tempered glass layer tensile stress area, so the filling furnace SO2 will not speed up the glass blew.

9.Where is the mainly chemical steel used?

◎Mainly used in electronic components and aircraft window glass.

10.What is white mist? How to solve it?

◎White mist phenomenon: For the defects of glass heating method and the tempering furnace temperature is not set, and the glass inside and outside heating temperature is inconsistent, uneven heating, making the glass heat in the long time warping side of movement. So it will produce white mist and it is scratched.

◎Solution: The polishing wheel of wool felt with polishing power can throw away the white mist, decrease the lower furnace temperature, reduce the lower power and convection, adjust the film mode.

11. The method to reduce the glass blew?

Using the high quality original float film, hot-dip treatment, grinding treatment, control the appropriate stress intensity, avoid the edge collision when installing.

12.Does the homogeneous treatment longer is better?

No, it does not. Because the longer homogenization process will reduce the stress on the glass surface, at the same time, it will produce new nickel sulfide phase and the long process will increase the cost.

13. What kind of glass should be used on the museum?

With laminated glass, for PVB film in the laminated glass can absorb 99% UV, can be beneficial protect the museum in the cultural relics from UV damage.

Guangzhou Topo Glass Co., Ltd. (https://www.topoglass.com) have Nano Anti-reflective Glass, also called AR Glass which is widely used for Museum Glass.

14.The reason and treatment of glass mold?

◎Mildew conditions: The surface of glass is not smooth and long term dark conditions.

◎Moldy reasons:

◎Moldy reasons: the initial water or moisture absorption on the glass surface, by water or moisture spread to the glass, the soluble silicate on the surface layer is hydrolyzed and destroyed. Firstly,

◎Treatment: Sprinkle with anti-mildew power in the glass surface.

15. Can bending steel be coated?

The bending steel cannot be coated, but after coated can do bending steel.

16.How to increase the energy efficiency of hollow glass?

◎Filled the hollow glass with argon

◎Use low-e glass to produce hollow glass

◎Appropriately increase the thickness of the air layer of hollow glass to 12mm

◎Adopt the warm side system

◎Can replaced white glass to colored glass during summer season

17. Will not the air inside the insulating glass allow the film to oxidize?

No, it will not. For there have molecular sieves in the insulating glass and it will always keeps the air dry, so the membrane layer will not be oxidized.

18.Which impact for glass will have in the altitude difference more than 1000 meters? How to deal with it?

It will have impact on the glass for the pressure difference resulting in different internal and external pressure of insulating glass, resulting in insulation of insulating glass. Plug the capillaries on the insulating glass.

19.What are the advantages for imitation marble glass compared the marble?

More simple, cheap, more environmentally friendly, variety, good weather resistance, construction convenience, reduce transport cost

20.What is the demand for the insulating glass of the two substrate thickness?

The difference of thickness for two substrates should not exceed 3mm

21.How about the standard of country’s self-blasting rate?

There is no national standard, but the industry standard is 3‰

22.How many UV rays can the low-e glass be reduced?

◎Compared to heat reflective glass can reduce 14% UV

◎Compared to white glass can reduce 25% UV

23.Why the glass next the air conditioning is easily broken?

◎Due to thermal stress and damage, the glass absorbs heat, so the glass body expansion. And the glass in the aluminum frame cannot be exposed to radiation, resulting in glass body heat uneven, the formation of internal thermal stress, the thermal expansion of the glass In area produce tensile stress in border area, it will broken if above the tensile strength.

24. Are the particles the smaller the better when tempered glass broken?

No, the tempered glass is much easier to blew if the particles smaller.

25. Why some installed laminated glass will crack? How to prevent?

For the laminated glass film PVB can absorb the sun in the ultraviolet light and part of other infrared harmful rays make the inside temperature rise, resulting in thermal stress, making the glass crack.

There are several ways to crack:

1)Thermal blowout design and calculate the reasonable selection of glass structures and varieties.

2)For edging to eliminate the edge of the micro-cracks.

3)Reduce and eliminate the collapse phenomenon during production, handling and installation.

26. Whether the laminated glass can avoid fire and sound insulation?

The laminated glass is not the fireproof glass, but there is a certain degree to fir resistance and also be soundproof. Laminated glass in the whole sound wave frequency range and it is very good in the control of noise.

27. How much the energy loss for single-layer glass compare to laminated glass?

After test calculation, monolithic windows per square meter to be 584w of cooling power and double insulated glass only 372w, about 30% of the energy savings.

28. What is the “boil experiment”?  What’s the effect?

Place the laminated glass sample vertically in a 66±3℃. After three minutes, removed the sample from the water tank and immediately put it in another boiling water tank for 2 hours.

Effect: Evaluate the stability of laminated glass under high temperature and high humidity conditions.

29. What is Newton ring?

Newton ring is the interference pattern between the two pieces of glass when contact occurs and more easily be seen than brewer ring. The glass is actually separated by a thin layer of air; the small changes of air layer may lead straight line, ring or like the contours of the map as some irregular interference pattern.

30.Could the tempered glass and semi-tempered glass be made of laminated glass?

No, it does not. As GB requirements: the stress difference between glass cannot do laminated glass, for the pressure is different between two pieces of glass in the use of process.

31.Why need to maintain constant temperature and humidity for laminated glass room?

For the PVB film will easily be yellow for exposed in the air for a long time, at the same time, it will absorb moisture to influence the quality of the film.

Very welcome to search our website at http://www.topoglass.com for more glass. Topo Glass will provide you the top quality glass with competitive price to satisfy your market.