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The chart below presents additional data illustrating ADC/CR-39® strong resistance to long-term chemical exposure.

MAJOR PROPERTY SPECIFICATIONS

 

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
 
 
CHEMICAL % WEIGHT GAIN*
Distilled Water 0.7
Acetone 0.5
Gasoline 0.1
95% Ethyl Alcohol 0.1
30% H2SO4 0.5
10% HNO3 0.7
10% HCL 0.4
10% NH4OH 0.8
10% NaOH 0.5
Ethyl Acetate 0.3
Toulene 0.6
Benzene 0.7
* After 7 days immersion at 25ºC
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