tempered Insulated Glass

tempered Insulated Glass structure example

5mmToughened Glass + 12A (hollow layer) + 5mmToughened Glass

6mm Low-EToughened Glass + 16A (Argon-filled) + 6mmToughened Glass

Our factory tempered Insulated Glass processing and production specifications

               1. Glass thickness specifications

• Single layer Toughened Glass thickness:

• Common thickness: 5mm, 6mm, 8mm, 10mm, 12mm (most commonly used 5mm, 6mm).

• Minimum thickness: 4mm (need to comply with the Toughened Glass national standard 'GB 15763.2-2005').

• Maximum thickness: generally not more than 19mm (ultra-thick glass requires special equipment processing).

• Asymmetric combination: Different thickness combinations can be customized (such as 5mm+6mm), but stress balance needs to be considered.

               2. Specifications of hollow layer (air layer)

               Thickness (A value): General options: 6A, 9A, 12A, 16A, 20A (A=Air, unit mm). Recommended range: 12A~16A (the best thermal insulation, excessive intensity will be reduced). Gas filling: dry air (default) or inert gas (argon, krypton), the argon filling purity must be ≥90%.

               3. Maximum processing size: limited by tempering furnace, generally ≤3300mm×7000mm (extra-large size needs to be made in segments). Minimum processing size: usually ≥300mm×300mm (too small affects the sealing of the hollow layer).

               4. Tempering standard: Comply with safety glass standards (such as GB 15763.2), surface stress ≥90MPa. Fragment status: The number of particles after rupture is ≥40 (50mm×50mm area).

               5. Tolerance range

• Thickness tolerance: ±0.2mm (after tempering). Dimensional tolerance: ±1.5mm (when side length ≤2000mm), ±2mm (when side length >2000mm).

• Hollow layer thickness tolerance: ±0.5mm. Diagonal deviation: ≤2mm (side length ≤2000mm), ≤3mm (side length >2000mm).

               6. Support customers to order customization

Our factory's tempered Insulated Glass processing process

               1. Selection of glass original sheet: Floating glass is usually 5-19mm thick, without scratches, bubbles, stones and other defects. If energy-saving performance is required, Low-E glass can be selected (coated faces the hollow layer).

               2. Cutting: The CNC cutting machine is cut according to the size specified by the customer, and the tolerance is controlled within ±0.5mm.

               3. Grinding: Fine grind the edges (cavator or C-shaped grinding) to eliminate microcracks and avoid edge explosions during tempering.

               4. Drilling/grooving (if required): Completed before tempering, the edges of the holes need to be smooth.

               5. Tempering treatment

               ① Clean, use deionized water and a roller brush cleaning equipment to thoroughly clean the glass surface to avoid impurities affecting the tempering quality.

               ② Heat, feed the glass into a tempering furnace, heat it to 620-700℃ (adjust according to the thickness of the glass) to soften the glass.

               ③ Crack (air quench): Use high-pressure cold air (air grille) to uniformly and rapidly cool the surface of the glass to form surface compressive stress and internal tension stress, and increase the strength (about 4-5 times that of ordinary glass).

               ④ Quality inspection:

• Particle size test: The number of particles after crushing must comply with GB 15763.2-2005 standard (40-60 particles/50mm²).

• Flatness detection: Use optical instruments to check bow shape and wave deformation (≤0.3%).

• Stress test: Polarizer detects surface stress values ​​(≥90MPa).

               6. Insulated Glasses Synthesis

               ① Preparation of aluminum spacer strips: Use aluminum spacer strips with molecular sieve desiccant, bend them into frames according to their size, and connect the four corners with insertion angles or bent angles.

               ② Butyl glue coating (first seal): Apply butyl glue evenly on both sides of the aluminum frame to ensure continuous and no breakpoints and prevent gas leakage.

               ③ Combination of sheets: Combine two pieces of Toughened Glass (or one piece of Toughened Glass and a piece of ordinary glass) with an aluminum frame to form a hollow layer (the thickness is usually 6-24mm). If Low-E glass is used, make sure that the coating surface faces to the hollow layer.

               ④ Second sealing: Use silicone glue or polysulfide glue to seal along the edge of the glass to enhance structural strength and durability. The width of the glue layer must be ≥5mm and the thickness must be ≥3mm (refer to GB/T 11944-2012).

               ⑤ Inert gas (optional): Fill in argon (Ar) or krypton gas (Kr) to improve insulation performance, and detect airtightness after inflation (leakage rate ≤1%/year).

               7. Post-processing and detection

               Curing: The second sealant needs to be cured at a constant temperature (20-25℃) and humidity <50% for more than 24 hours.

               Performance detection: Dew point test ≤-40℃ (test whether water vapor remains in the hollow layer).

               Sealing test: Pressure method or ultrasonic wave detection of edge seal mass.

               Appearance inspection: no glue marks, bubbles, scratches, and no offset of the spacer.

Our factory tempered Insulated Glass key process control points

• Tempering link:

               The heating temperature and time must be accurately controlled according to the thickness of the glass to avoid overburning or uneven cooling.

               Secondary cutting or drilling of tempered glass is strictly prohibited.

• Hollow link:

               Butyl glue needs to be sealed throughout the process to avoid failure of molecular sieve.

               The composite film environment needs to be clean (dust-free workshop is recommended), and the humidity is ≤30%.

               Packaging and transportation in our factory tempered Insulated Glass

               It adopts vertical packaging, with soft gaskets isolated between the glass, with protective tapes attached to the edges, marked 'Toughened Glass' and rainproof marks.

Quality standards of our factory tempered Insulated Glass

• GB 15763.2-2005 'Safety Glass for Buildings Part 2: Toughened Glass' stipulates the requirements for the mechanical properties, impact resistance, debris status of Toughened Glass.

• GB/T 11944-2012 'Insulated Glasses' specifies the sealing performance, dew point, ultraviolet resistance and other properties of Insulated Glasses.

• JGJ 113-2015 'Technical Regulations on the Application of Building Glass' involves design, installation and acceptance requirements.

• Passed the CCC certification for national security glass mandatory certification

Our factory tempered Insulated Glass features

               1. High safety and strong impact resistance: The strength of Toughened Glass is 3 to 5 times that of ordinary glass, and can withstand large external impacts.

               2. Crushing safety: When broken by impact, fine blunt angle particles will be formed (compliant with GB 15763.2 standard), which will not easily hurt people.

               3. Temperature difference resistance: It can withstand temperature difference changes above 200℃ (ordinary glass is only about 50℃), suitable for extreme climate areas.

               tempered Insulated Glass vs. Normal Insulated Glasses

tempered Insulated GlassApplication

• tempered Insulated Glass is widely used in residential buildings, hotels, hotels, office buildings, schools, hospitals, shops, etc. where indoor air conditioning is required;

• It can also be used on buildings that require heating, air conditioning, prevent noise or condensation, and require no direct sunlight and special light;

• It can also be used in doors and windows of trains, cars, ships, freezers, etc.

Application scenarios and specification suggestions