Durostone ^® Fiberglass Reinforced Plastic Solder Pallet Materials Specifications

TECHNICAL DESCRIPTION

Durostone ^® is a heavy-duty glass fibre reinforced 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.

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.

TYPICAL PROPERTIES of DUROSTONE ® FRP
Property	Durostone ® CHP760	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)	> 10 10	10 5 - 10 8	10 5 - 10 8	10 5 - 10 8