How is the divided grade of glass in China?

Glass is divided into two types：Float Flast Glass and Safety glass

First, the Float flat glass

Float Flat glass refers to the flat glass without any other processing products, also known as white glass or net glass. According to different production methods, can be divided into ordinary flat glass and float glass. Flat glass is the largest and most widely used architectural glass, mainly used in doors and windows, lighting (visible light transmittance 85% 90%), enclosure, insulation, sound insulation and other functions, but also further processed into other technical glass The original film.

Flat glass according to their use can be divided into window glass and decorative glass. According to the national standard "ordinary flat glass" (GB4871-1995) and "float glass" (GB11614-89), the thickness of the glass can be divided into the following specifications:

Lead to pull the production of ordinary flat glass: 2mm, 3mm, 4mm, 5mm four categories.

Float glass: 3mm, 4mm, 5mm, 6mm, 8mm10mm, 12mm seven categories.

The length-width ratio of the glass produced by the pull-down method shall not be more than 2.5, of which the size of 2,3 mm thick glass shall not be less than 400 mm × 300 mm, and the thickness of 4,5,6 mm thick glass shall not be less than 600 mm × 400 mm. Float glass size is generally not less than 1000mm × 1200mm, 5,6mm up to 3000mm × 4000mm.

In accordance with national standards, flat glass grades grading according to their appearance quality, ordinary flat glass is divided into excellent products, first-class products and second-class products in three grades. Float glass is divided into excellent products, a product and qualified products in three grades. At the same time, the glass curvature of not more than 0.3%.

Second, the safety glass

Safety glass is compared with ordinary glass, with high mechanical strength, impact resistance of glass. The main varieties of tempered glass, glass wire folder, laminated glass and titanium glass. When the safety glass is crushed, its debris will not hurt, and both anti-theft, fire protection. According to the glass used in the production of the original film, safety glass has a certain decorative effect.

(A) tempered glass

Tempered glass, also known as tempered glass. It is a physical or chemical method, the glass surface to form a compressive stress layer, the glass itself has a high compressive strength, will not cause damage. When the glass is subjected to external force, the pressure layer can be part of the tensile stress off, to avoid the glass fragmentation, although the internal tempered glass is in a state of large tensile stress, but no defects inside the glass, will not create damage , So as to achieve the purpose of improving the glass strength.

Toughened glass is the second processing of flat glass products, toughened glass processing can be divided into physical toughening and chemical toughening.

(B), wire folder glass

Clamped glass, also known as shatter-resistant glass or wire glass. It is produced by the rolling method, that is, in the molten glass state will be preheated wire or steel wire pressed into the middle of the glass, the annealing and cutting. Clamped glass surfaces can be embossed or polished, and the color can be made clear, colorless or colored.

(C) laminated glass

Laminated glass is a flat or curved composite glass product made of two or more pieces of original glass with PVB (polyvinyl butyral) resin film heated and pressure bonded. The original sheet for laminated glass can be ordinary flat glass, float glass, tempered glass, stained glass, heat-absorbing glass or heat-reflecting glass.

Laminated glass layers 2,3,5,7 layers, up to 9 layers, the two layers of laminated glass, the original film thickness (mm): 2 +3,3 +3,3 +5 and so on. The structure of the laminated glass, as shown in Figure 8-1.

The transparency of laminated glass is good, impact resistance is several times higher than the average flat glass, laminated with ordinary glass or toughened glass can be made of bullet-proof glass. Due to the adhesion of PVB film, even if the glass is broken, the fragments will not fly. Through the use of different original glass, laminated glass can also have durable, heat-resistant, moisture-resistant properties.

(D) Titanized glass

Titanized glass, also known as never broken iron foil glass. Is the titanium foil film clings to any kind of glass substrate, so that it is integrated into a new type of glass. Titanized glass with high crushing capacity, high heat and UV functions. Different substrate glass and different titanium foil film, can be combined into different color, different properties, different specifications of titanium glass. Titanized glass common colors are: colorless and transparent, brown, brown reflective, reflective copper and so on.

Third, energy-saving glass

The traditional glass application is mainly on the building lighting, with the increase of the size of the building doors and windows, people on the insulation requirements of windows and doors also increased accordingly, energy-saving decorative glass is able to meet this requirement, energy-saving And decorative in one of the glass. Energy-saving decorative glass usually has a pleasing appearance color, but also has special light and heat absorption, transmission and reflection ability, with the building's exterior window glass curtain wall, you can play a significant energy saving effect, is now Is widely used in various high-rise buildings above. Architectural commonly used energy-saving decorative glass with heat-absorbing glass, heat-reflective glass and insulating glass.

(A) heat-absorbing glass

Heat-absorbing glass is a flat glass that absorbs a large amount of infrared radiation and maintains a high transmittance of visible light. There are two ways to produce endothermic glass: one is to add a certain amount of colorant with endothermic properties to the raw materials of ordinary soda lime silicate glass; the other is to spray one or more layers Metal or metal oxide film and made.

Heat-absorbing glass gray, brown, blue, green, bronze, bronze, pink and golden yellow and so on. At present, our country mainly produces the first three colors of heat-absorbing glass. The thickness of 2,3,5,6 mm four. Heat absorbing glass can be further processed into polished, tempered, laminated or insulating glass.

(B) heat reflective glass

The heat-reflective glass is a flat glass that has high heat-reflecting ability and good light-transmitting property. The glass is coated with gold, silver and copper by pyrolysis method, vacuum evaporation method and cathode sputtering method , Aluminum, chromium, nickel and iron metal or metal oxide film, or the use of electric floatation plasma exchange method, with metal ions to replace the original surface of the glass ions to form a thermal reflective film. Heat-reflective glass, also known as the mirror glass, gold, brown, gray, purple, brown, bronze and light blue and other colors.

The heat-reflective glass has a high thermal reflectance such as 16% of the total heat of reflection of a 6mm-thick float glass. Under the same conditions, the total heat of reflection of the heat-absorbing glass is 40%, while the heat-reflecting glass is as high as 61% It is made of hollow glass or laminated glass to increase its thermal insulation properties. Metal-coated heat-reflective glass also has the role of one-way transparent image, that is, during the day to see the outdoor scenery indoors, and the indoor can not see the scene.

The company is located in:

Following the decoration of the common one by one description:

First, the ordinary flat glass.

1, 3 - 4 cm glass, mm is also known as daily in the PCT. We say 3 PCT glass, refers to the thickness of 3mm glass. This specification of glass is mainly used for picture frame surface.

2, 5 - 6 cm glass, mainly used for exterior windows, doors and other small areas of transparent shape and so on

3, 7 - 9 PCT glass, mainly used for indoor screens and other large areas but also the framework of the protection of the shape.

4, 9 - 10% glass, can be used for indoor large area partition, pole and other decoration projects.

5, 11 - 12 cm glass, can be used to spring the glass door and some activities flow larger partition.

6, 15% of the glass, the general market less sales, often need to order, mainly for a large area of the spring glass door wall glass block wall.

Second, other glass

Other glass, said only the author in terms of classification compared with the flat glass, not the industry's official classification. There are: 

1, tempered glass. It is an ordinary flat glass after reprocessing into a prestressed glass. Compared with ordinary flat glass, tempered glass has two major characteristics:

1) The former is several times the strength, tensile strength is more than 3 times the latter, the impact is the latter 5

Times more.

2) Tempered glass is not easily broken, even if the broken will be broken with no acute angle particle form, to people

Body injuries greatly reduced.

2, frosted glass. It is also in the ordinary flat glass and then frosted processing. The general thickness of more than 9% to 5,6 cm thickness with more.

3, sandblasting glass. Basically similar to the performance of frosted glass, the different change to sand blasting. As both are visually similar, many owners, even fitting professionals, confuse them.

4, embossed glass. Is a flat glass manufactured by rolling method. Its biggest feature is transparent opaque, and more used in the bathroom and other decoration area.

5, wire glass. Is the use of rolling method, the wire or metal mesh embedded in glass made of a plate with impact resistance, by the impact of the formation of radial cracks will not fall into injury. It is mostly used in high-rise buildings and shock strong plant.

6, insulating glass. Use more glue method to keep two glass at a certain interval, the interval is dry air, sealed with sealing material from the periphery, mainly used for the decoration of sound insulation requirements.

7, laminated glass. Laminated glass is generally composed of two sheets of plain glass (also tempered glass or other special glass) and an organic glue layer between the glass. When damaged, the debris still adheres to the glue layer, avoiding the splatter caused by debris on the human body. More for the security requirements of the renovation project.

8, bullet-proof glass. Is actually a kind of laminated glass, but the composition of the glass to use more high strength tempered glass, and the number of mezzanines is relatively large. More used in banks or luxury and other safety requirements are very high among the renovation.

9, Rewan glass. Glass heated by plate glass softens in the mold and then annealed. In some high-rise decoration appear more frequently, need to book, there is no stock.

10, glass brick. The basic production process of glass tiles and flat glass, the difference is the molding method.

The middle is dry air. Used for decorative items or insulation requirements of the transparent shape

In

11, cellophane. Also known as glass film, with a variety of colors and colors. According to the different properties of paper, with

Have different performance. The vast majority of insulation, anti-infrared, anti-UV, explosion-proof and so on.

Third, glass construction and use of the matters needing attention

1, in the transport process, we must pay attention to fixed and add soft pad. It is generally recommended to use the erected method of transport. Vehicles should also pay attention to maintain a stable and slow speed.

2, the other side of the glass installation is closed, pay attention to clean the surface before installation. It is best to use a dedicated glass cleaner, and to be dry until no stains confirmed before installation, the best use of clean construction gloves.

3, the installation of glass, silicone sealant to be used for the fixed installation in the windows, but also with the rubber seal with the use of such.