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OGC OKP4 Polyester Optical Plastic
Categories:
Polymer
;
Thermoplastic
;
Polyester, TP
Material Notes:
OKP is a special polyester for optical use arising from coal chemistry. High performance injection-molded objects and melt-extruded films are easily fabricated due to its high fluidity. Used in lenses, films, and other optical components.
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Thermal Properties
Metric
English
Comments
CTE, linear
72.0
µm/m-°C
40.0
µin/in-°F
Deflection Temperature at 1.8 MPa (264 psi)
106
°C
223
°F
Glass Transition Temp, Tg
121
°C
250
°F
Optical Properties
Metric
English
Comments
Refractive Index
1.607
@Wavelength 589.3 nm
1.607
@Wavelength 589.3 nm
D line; Coefficient of temperature dependence is -0.00013/°C
Abbe Number
27
27
v
D
Descriptive Properties
Birefringence
< 0.0005
OGC Method
Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's
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POSAKA90 / 191483
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