TECHNICAL DESCRIPTION Durostone ® is a heavy-duty glass fibre reinforced (FRP) plastic which offers extreme strength and excellent electrical, thermal and chemical properties. Durostone ® is manufactured by using Polyester, Vinylester, Epoxid- and modified Epoxy resins combined with glass fibers.
GENERAL PROPERTIES Durostone ® materials have excellent mechanical properties at elevated temperatures and are dimensionally stable and retain their flatness through repeated cycling in the PCB assembly process. The low thermal conductivity of Durostone ® ensures optimal thermal distribution across the work area. The base resin used to produce Durostone ® provides resistance to the chemicals used in fluxes and also prevents solder pick-up.
Durostone ® is available in sheet form only in standard thicknesses of 0.118", 0.157", 0.197", 0.236", 0.315", 0.394" and 0.472" by 48" by 96". Stated tolerance on thicknesses is +/- .004".
TYPICAL APPLICATIONS Durostone ® materials are designed and typically recommended for use in manufacturing solder pallets for wave-solder applications of printed circuit boards (PCB's). These materials can also be used for carriers in solder paste printing, SMT placement, IR-reflow, and conformal coating operations.
DUROSTONE ® GRADES Durostone ® CHP760 - General Purpose
The standard grade, Durostone ® CHP-760, works well for most general use applications and is BLUE in color.
NOTE: This grade has been discontinued by the manufacturer (Feb2012).
Durostone ® CAS761 - Antistatic
The antistatic grade, Durostone ® CAS-761, is recommended for applications where static-sensitive components are processed and is BLACK in color.
Durostone ® CAG762 - Optical & Antistatic
Durostone ® CAG-762 is an antistatic grade with light reflection properties suitable for infra red and optical sensors. It is GRAY in color.
Durostone ® CCR766 - Antistatic & Chemically Resistant
Durostone grades, CHP, CAS and CAG were developed to cover the majority of applications within the PCB assembly industry. However, degradation of these materials can occur in the presence of agressive fluxes containing halides and/or a high percentage of isopropyl alcohol. Durostone ® CCR-766 is extremely resistant to halides and alcohol and laboratory tests have shown that it can withstand many cycles in harsh environments. Durostone ® CCR-766 is BLACK in color. NOTE: Do not use Durostone ® CCR-766 in the SMT process. It has been specifically developed for a wave soldering environment with only short exposures to extreme temperatures.
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TYPICAL PROPERTIES of DUROSTONE® FRP
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| Property |
Durostone® CHP760 (discontinued)  |
Durostone® CAS761  |
Durostone® CAG762  |
Durostone® CCR766 |
| PHYSICAL | ||||
| Grade | Standard | Anti-Static | Anti-Static Optical |
Anti-Static Chem.Res |
| Color | Blue | Black | Grey | Black |
| Density (lb/in³) (g/cm³) |
0.067 1.85 |
0.067 1.85 |
0.067 1.85 |
0.066 1.83 |
| Water Absorption (%) | < 0.20 | < 0.20 | < 0.20 | < 0.20 |
| MECHANICAL | ||||
| Tensile Modulus (psi) | 2,600,000 | 2,600,000 | 2,600,000 | 2,600,000 |
| Flexural Strength (psi) | 52,200 | 52,200 | 52,200 | 43,500 |
| Barcol Hardness | 80 | 80 | 80 | 80 |
| THERMAL | ||||
| Coefficient of Linear Thermal Expansion between 80°F and 390°F (x 10-5 in./in./°F) |
0.7 | 0.6 | 0.6 | 0.6 |
| Short Term Max Operating Temp 10 to 20 sec (°F / °C) |
660 / 350 | 660 / 350 | 660 / 350 | 660 / 350 |
| Max Continuous Operating Temp (°F / °C) | 500 / 260 | 500 / 260 | 500 / 260 | 500 / 260 |
| Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10-4 cal/cm-sec-°C) |
1.80 6.20 |
3.70 12.8 |
3.70 12.8 |
3.70 12.8 |
| Specific Heat Capacity (BTU/lbm-°F) (x J/kg-°K) |
0.23 960 |
0.23 960 |
0.23 960 |
0.23 960 |
| ELECTRICAL | ||||
| Surface Resistivity (ohms per square) | > 1010 | 105 - 108 | 105 - 108 | 105 - 108 |
NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.DUROSTONE is a registered trademark of Röchling Haren KG
All values at 73°F (23°C) unless otherwise noted.
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Copyright Boedeker Plastics, Inc.