Properties
- Light Transmission - NXT cast sheet has a light transmission of 91%.
- Impact Resistance - NXT is exceptionally resistant to impact.
- Light Weight - With a density of 1.14 g/cm3, NXT is one of the lightest optical plastic materials available.
- Thermal Stability - NXT is thermally stable at temperatures beyond what other typical plastic materials can withstand.
- Stress Birefringence - NXT cast sheet is non-birefringent, free of residual stresses and internal strain.
- Haze - NXT cast optical sheet has a very low haze value of < 0.2%.
- Chemical Resistance - NXT cast sheet is virtually unaffected by most organic and inorganic chemicals as well as most substances encountered in harsh environments.
Property Values
| Optical Property |
Standard NXT Sheet |
ASTM Test Method |
JIS Test Method |
ISO Test Method |
| Diffuse Transmittance |
0.2% |
|
| |
| Parrallel Ray Transmittance |
90.6% |
|
| |
| Light Transmittance |
91% |
D1003 |
K 7105 |
|
| Haze |
0.11% |
D1003 |
K 7105 |
|
| Refractive Index |
1.538 |
D542 |
K 7105 |
489 |
| Thermal Property |
Standard NXT Sheet |
ASTM Test Method |
JIS Test Method |
ISO Test Method |
|
Specific Heat (J/gºC)
50º C
100°C
150°C
200º C |
2.06
2.31
2.6
3.04
|
|
K 7123 |
|
| Flammability (UL94) |
V-2 |
|
|
|
|
Coefficient of Thermal Expansion |
1.28x10-4 / k |
|
|
1139-2/01 |
|
Temperature of Deflection
under Load
1.80 MPa
0.45 MPa
|
69.6º C
155º C |
|
|
75/97 |
| Vicat Softening Temperature |
149º |
|
|
306/98 |
|
Mechanical Property |
Standard NXT Sheet |
ASTM Test Method |
JIS Test Method |
ISO Test Method |
| Density |
1.320 |
D792 |
|
|
| Tensile Modulus (1mm / min) |
1411 MPa |
|
|
527/97 |
| Yield Stress (50mm / min) |
51.7 MPa |
|
|
527/97 |
| Yield Strain (50mm / min) |
12.2% |
|
|
527/97 |
| Stress at Break (5mm / min) |
56.6 MPa |
|
|
527/97 |
| Strain at Break (5mm / min) |
138% |
|
|
527/97 |
|
Charpy Impact Strength
23º C
-30º C |
No failure
No failure |
|
179/02
|
|
| Impact Strength IZOD (23±2ºC) |
21.3 kJ/m2 |
D256 |
K 7110 |
180 |
| Hardness, Rockwell |
71 HRM |
D785 |
K 7202 |
2039-2 |
| Pencil Hardness |
2B |
|
K 6500-5-4 |
|
| Shore D |
84 |
|
|
|
| Taber Abrader (500 xs) |
6mq |
|
K 7204 |
|
| Electrical Property |
Standard NXT Sheet |
ASTM Test Method |
JIS Test Method |
ISO Test Method |
| Surface Resistivity |
<5.2x108MΩ |
|
K 6911 |
|
| Volume Resistivity |
5.8x109MΩ*CM |
D149 |
K 6911 |
1183 |
| Physical Property |
Standard NXTSheet |
ASTM Test Method |
JIS Test Method |
ISO Test Method |
| Specific Gravity |
1.14 |
|
|
1183 |
Availability
Standard Cast Sheet Sizes
| Size |
Thickness |
| 370 mm x 370 mm |
0.8 mm and 1.0 mm |
| 410 mm x 370 mm |
1.3 mm and 1.8 mm |
550 mm x 500 mm
|
2.0 mm, 3.0 mm and 5.0 mm |
Custom size and thickness available upon request
Standard Colors
| Clear (Colorless) |
Brown |
Grey |
| Orange |
Red |
Blue |
| Yellow |
Green |
Aqua (Blue-Green) |
| Laser Red, 670nm |
Laser Red, 650 nm |
IR Transmitting Only |
Custom Colors
Available per customer specification.
Luminous Transmission
Variable range from 92% to less than 1%.
UV Radiation Absorption
Absorber “A” blocks UV up to 100% at 400 nm
Absorber “B” blocks UV up to 98% at 380 nm