| PROPERTY |
TEST METHOD |
FOSTA-TEK
ADC
(CR-39) |
COATED POLYCARB |
COATED ACRYLIC |
CAST POLYESTER |
CROWN GLASS |
OPTICAL
Transmission %
Refractive Index
Haze %
Yellowness Index |
ASTM D1003
ASTM D542
ASTM D1003
ASTM D1925 |
92
1.50
.3-.9
.6-1.4 |
89
1.58
.5-1.0
.8-1.0 |
89
1.46
2.0
1.5-2.0 |
88
1.55
2-4
2.0-3.0 |
92
1.52
.3
.6 |
PHYSICAL/MECHANICAL
Specific Gravity
Flexural Strength
Hardness Rockwell M
Impact Strength
Abrasion Resistance |
ASTM D792
ASTM D790 x 1000PSI
ASTM D1044 & D785
ASTM D256
Taber x Acrylic |
1.31
7.5-13.0
95-100
.2-.4
15-20 |
1.20
13.5
70
16
.2 |
1.19
14.6
93
.4
1 |
1.38
8.6
91-95
.25
4 |
2.50
1.8
N/A
N/A
N/A |
THERMAL
Thermal Expansion
Thermal Conductivity
Heat Distortion (C)
Operating Temp
UL Flammability Class. |
ASTM D696
ASTM C177
ASTM D648 @ 264PSI
Continuous (C)
UL Labs. |
8.1-14.3
4.8-5.0
130
100/148*
UL94HB |
3.75
1.35
132
97
UL94V-2 |
2.7-4.3
0.9
82
65
UL94HB |
7.15
4.0
104
110
UL94HB |
4.0-6.0
0.4-0.6
N/A
N/A
N/A |
ELECTRICAL
Dielectric Strength
Dielectric Constant |
ASTM D149
ASMT D150 |
380
4.2 |
1700
2.99 |
500
3.7 |
382
3.5 |
760
2.9-3.5 |
