Atlas Optical Co.,Ltd

Optical

FSM

Properties of Float Glass

We are the agency of American "OCLI"
More information on the products manufactured by American OCLI Company

Mechanical and physical properties
Property	Value
Density	2.5
Hardness	8.5(Moh’s)
Young’s modulus	7 X 1010Pa
Lateral deformation coefficient	0.2
Specific heat	0.22Wh/kgK
Linear expansion coefficient	8.5 X 10-8mm/mK
Thermal coefficient	1W/m2K
Refractive index of visible light	1.52

Transparent float glass
	Electrical float glass	Reflection glass (silver mirror)
Thickness (mm)	6	6
Transmission rate of visible light
Transmissivity	0.51	0.33
Reflectivity		0.51
Sunlight radiant heat
Reflection ratio	0.10	0.28
Absorption ratio	0.36	0.29
Direct transmission rate	0.54	0.43
Total transmission rate	0.66	0.53
Masking coefficient
Short wave	0.62	0.49
Long wave	0.14	0.12
Total	0.76	0.61
Heat transmission rate
U value (W/m2k)	5.4	5.4
Sound insulation
Average (dB)	29	29
Weight (kg/m2)	15	15
Maximum dimension	2640 X 6000	2640 X 6000
■Anti-wind strength is the same as transparent float glass.

Transparent float glass
Thickness (mm)	Light transmission rate (%)	Sunlight transmission rate (%)	Anti-wind strength Permissible load (kg)
2	89	85	80
3	88	83	180
4	87	80	260
5	86	77	360
6	85	75	440
8	83	70	800
10	81	65	1000
12	79	61	1200
15	76	55	1700
19	72	48	2600
■Permissible load = permissible wind pressure (kg/m2) x area of glass (m2)

ATLAS OPTICAL CO.,LID.(Head Quarter)
Tel:886-2-2891-5008
Fax:886-2-2897-6990
Email:contact us

Suzhou Guangda Photoelectric Technology Co.,Ltd.
Tel:86-512-6258-9225
Fax:86-512-6258-9226
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Atlas Optical(Dong Guan)Co.,Ltd.
Tel:86-769-8611-0371
Fax:86-769-8611-0375
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