Ultra Clear Medium Alumino Silicate Glass Sheet for Touch Screen Cover
Ultra Clear Medium Alumino-Silicate Glass(CHIYAN-M2) is an eco-friendly ultra-thin alumino-silicate glass with certain strength.
Features:
Application: Widely used in fields such as Consumer Electronic Display Cover Glass, Automobile Glass, Photovoltaic, Industrial Touch, Smart Home and so on
Regular Thickness:
2.0mm 1.80mm 1.50mm 1.30mm
1.10mm 0.70mm 0.55mm
0.40mm 0.33mm 0.25mm
CHIYAN-M2’s 0.25~2.0mm thickness medium alumino-silicate glass has already been used in the market to meet a wide range of customers needs.
Standard Size:1300*1100mm (5th Generation)
Note: The size can be customized according to customer's needs.
Product Composition
Ultra Clear Medium Alumino-Silicate Glass achieves better stress and strain depth than ordinary soda-lime glass by increasing the Al₂O₃ content in the glass and increasing the ion exchange capacity.
Composition items | SiO₂ | Al₂O₃ | Fe₂O₃ | CaO | MgO | K₂O | Na₂O |
Range of set value | 69.0-72.0 | 4.5-8.0 | ＜0.01 | 6.0-8.0 | 3.5-5.0 | 0.1-1.0 | 13.0-14.5 |
Physical Property Parameter
S/N | Items | Unit | Test Standard | CY-M2 |
1 | Density | g/cm3 | GB/T5432-2008 | 2.48±0.01 |
2 | Refractive Index | / | GB/T 2680-2021 | 1.51±0.01 |
3 | Young's Modulus | Gpa | GB/T 37780-2019 | 73.0±0.5 |
4 | Transmittance | % | GB/T 2680-2021 | ≥91.5 |
5 | Volume Resistivity | lg(Ω .cm) | GB/T 31838.2-2019 | ≥10.0 |
6 | Dielectric Constant | / | SJ/T 11043-1996 | ≥7.0 |
7 | Softening Point | ℃ | GB/T 28195-2011 | 750±10 |
8 | Strain Point | ℃ | GB/T 28196-2011 | 516±5 |
9 | Annealing Point | ℃ | GB/T 28196-2011 | 562±5 |
10 | Thermal Conductivity | W/( m.K) | JC/T 675-1997 | 0.682±0.10 |
11 | Thermal Expansivity | * 10-7/℃ | SJ/T 11036-1996 | 85±5 |
12 | Photoelastic Coefficient | nm/cm/MPa | BS 7604-1-1992 | 27.0±0.2 |
13 | Poisson's Coefficient | / | GB/T 28195-2011 | 0.23±0.02 |
14 | Vickers-hardness | HV | GB/T 16534-2009 | 610±10 |
Chemical Tempering Process Parameter Setting Reference
Technological Parameter | 400°C | 410°C | 420°C | 430°C |
CS(MPa) | DOL(um) | CS(MPa) | DOL(um) | CS(MPa) | DOL(um) | CS(MPa) | DOL(um) |
3H | ≥650 | ≥7.0 | ≥650 | ≥8.0 | ≥650 | ≥9.0 | ≥650 | ≥10.5 |
4H | ≥600 | ≥8.0 | ≥600 | ≥9.0 | ≥600 | ≥11.0 | ≥600 | ≥12.5 |
5H | ≥600 | ≥9.0 | ≥600 | ≥10.0 | ≥600 | ≥11.5 | ≥600 | ≥13.0 |
Note: Tempering solution Na+<0.5%. The above test results are affected by processing conditions, the data is for reference only, not as a basis for production.
Dimensions
NO. | Item | Specification | Detection Method |
1 | Dimensional Tolerance | 1300*1100*(±2mm) | Tape Measure |
2 | Thickness | 0.50~1.1 ±0.05m 1.3~2.0 ±0.05m | Micrometer |
3 | Thickness Difference | ≤0.04mm | Micrometer |
4 | The Diagonal Difference
(Perpendicularity) | ≤0.3% | Tape Measure 
|
5 | Stripe | ≤Level2 | Point Sources of Light |
6 | Flatness (Before Tempering) | 0.50~0.55 ≤0.15%(=h/L) 0.70~2.0 ≤0.10%(=h/L) | 
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Appearance Specifications
NO. | Item | Specification | Detection Method |
1 | Effective Mass Area | All areas outside 10mm of the edge are effective mass areas. | 
|
2 | Appearance Defects | Scratches | w≤0.03mm, Allowed 0.03mm＜w≤0.05mm,L≤25mm (Controlled by point defects) w＞0.05mm, Not allowed | 
Fluorescent Lamp 2000-2500Lux 
|
Bubbles | d≤0.05mm, Not counted 0.05mm＜d≤0.2mm, Numbers≤5 /m² d＞0.2mm,Not allowed |
Inclusions such as stones and sticky tin | d≤0.05mm, Not counted 0.05mm＜d≤0.2mm, Numbers≤5 /m² d＞0.2mm,Not allowed |
3 | Edge Defects | Chipping | Single chipping L≤2.0mm,W≤1.0mm,D≤1/2 of the thickness (as the right picture showed). The cumulative length of chipping is less than 10% of the edge length of the glass plate. | 
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4 | Cracks and missing corners | Not allowed |
5 | Surface stains (glass shavings, attachments, point contamination) | No stains that cannot be removed by ordinary detergents are allowed. |
d≤0.05mm, Not counted 0.05mm＜d≤0.3mm, Numbers≤5 /m² d＞0.3mm,Not allowed | The same method as appearance detection. |
Packing Quantity
S/N | L*W*T(mm) | Packing Quantity (Pieces/Box) |
1 | 1300x1100x0.25 | 900 |
2 | 1300x1100x0.33 | 1020 |
3 | 1300x1100x0.40 | 900 |
4 | 1300x1100x0.50 | 750 |
5 | 1300x1100x0.55 | 680 |
6 | 1300x1100x0.70 | 550 |
7 | 1300x1100x0.82 | 490 |
8 | 1300x1100x0.95 | 420 |
9 | 1300x1100x1.0 | 410 |
10 | 1300x1100x1.1 | 370 |
11 | 1300x1100x1.3 | 310 |
12 | 1300x1100x1.5 | 280 |
13 | 1300x1100x1.6 | 250 |
14 | 1300x1100x1.8 | 230 |
15 | 1300x1100x2.0 | 200 |
Packaging Diagram
Storage Conditions: Temperature ≤30℃, humidity ≤65% (no condensation), shelf life is 6 months from the date of delivery.
Ultra White Medium Alumino-Silicate Glass(CHIYAN-M2) is adopted Float Glass Process.
Float glass is made by heating raw materials—silica sand, limestone, soda ash, and magnesium in a furnace. When melted, it’s then spread out over a sizable bed of molten tin. As it moves along rollers in the annealing oven during a controlled cooling process, this mixture slowly solidifies over the molten tin. From this point, a single, continuous smooth ribbon of glass emerges as below picture showed:
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