Precision Rexolite Machining

Rexolite® polystyrene plastic exhibits good dimensional stability, excellent sound transmission characteristics, and optical clarity roughly equal to acrylic materials. The most notable feature of Rexolite®, however, is that it maintains incredibly stable electrical properties into gigahertz frequencies. This extremely lightweight plastic is easy to machine, and Upland Fab has the expertise to deliver high precision Rexolite® parts and components that match your designs exactly.

Properties of & Applications for Rexolite® Polystyrene

Manufactured by C-Lec Plastics, Inc., Rexolite® is a unique, cross-linked polystyrene, microwave plastic. It maintains a dielectric constant of 2.53 through 500 GHz, with an extremely low dissipation factor; it experiences very little change in dielectric loss and minimal mechanical deterioration in radiation exposure up to 1000M rads.

Rexolite® provides excellent rigidity and dimensional stability, and good chemical resistance. It is also a water-resistant plastic, and can withstand operating temperatures from -455° to 349°F (-270° to 176°C).

These and other characteristics make Rexolite® an ideal material for microwave components, high-frequency circuit substrates, antennae, sound transducers, nondestructive material testing devices, radar windows, and other demanding applications.

Properties of Rexolite® Polystyrene

ASTM or UL test        Property

Rexolite® 1422 unfilled

Rexolite® 2300 glass-filled      
D792 Density (lb/in³)
D570 Water Absorption, 24 hrs (%) 0.0008 0.10
D638 Tensile Strength (psi) 9,000 9,500
D638 Flexural Strength (psi) 11,500 10,500
D256 IZOD Notched Impact (ft-lb/in) 0.3 0.75
D696 Coefficient of Linear Thermal Expansion(x 10-5 in./in./°F) 3.8 3.2

Recommended Operating Temperature Range (°F) (°C)

-76 to +212
-60 to +100
-103 to +212
-75 to +100
C177 Thermal Conductivity
(x 10-4 cal/cm-sec-°C)
D149 Dielectric Strength (V/mil) short time, 1/8" thick 500 500
D150 Dielectric Constant (1 MHz to 500 GHz) 2.53 2.62
D150 Dissipation Factor
at 1 MHz
at 10 MHz
at 10 GHz
D257 Surface Resistivity (ohm-cm)at 50% RH >1014 5 x 1012
D257 Volume Resistivity (ohm-cm)at 50% RH >1016 5 x 1013
                                                     OPTICAL AND ACOUSTIC   
- Acoustic Impedance 2.5 -
- Velocity of Sound (in/sec) 93,000 -
- Optical Transmittance, Visible Light 87% -
- Refractive Index
@ 589 nM
@ 486 nM
@ 656 nM


- Velocity of Sound (in/sec) 93,000 -

Proven Experts in Rexolite® Machining

When working with Rexolite®, Upland Fab uses state-of-the-art multi-axis machining technology to ensure superior precision, accuracy, and repeatability. With our CNC Rexolite® machining capabilities, handling and fixturing time is minimized or eliminated, and in many cases, highly intricate parts can be completed in a single operation for fast turnarounds.

Employing DPD/MBD processes (Digital Product Definition, or Model-Based Definition) enables us to work directly from your CAD models or other digital design files when machining your Rexolite® parts. This helps eliminate machining errors and improves accuracy and efficiency for higher quality, lower cost parts.

Stay In the Loop with Upland Fab’s Top-Flight Communication

We know how important reliable communication is to the success of a project. With Upland Fab, you’ll have a single point of contact through from the first stage to the last, and you’ll receive timely updates that will keep you informed on the progress of your project. We keep you up to date every step of the way.



Other Materials We Work With

Are you looking for another material? We have the ability to machine many different materials take a look below at some of the other plastics we work with. 




Contact Upland Fab to Learn More About Rexolite® Machining

We have provided top-flight plastic and composite machining in Southern California since 1970. Contact us to discuss your Rexolite® machining needs or request a quote to get the ball rolling.

Contact Us
Precision Plastic and Composite CNC Machining

Precision Plastic and Composite
CNC Machining since 1970.

Precision Plastic and Composite CNC Machining
©2024 Upland Fab - 1445 W Brooks Street, Unit L, Ontario, California 91762 - Phone: (909) 986-6565
Request Quote