AGI Information Page - Durapol LR-A
Solder Pallet Composite.
DURAPOL
LR-A Electrostatic Dissipative
Durapol LR-A was developed to meet the ever-increasing requirements
of the PCB industry. Durapol LR-A was designed as a low cost electrostatic
dissipative solder pallet alternative material to more expensive metal
or epoxy composites without sacrificing technical characteristics in
the solder pallet application.
Durapol LR-A is an electrostatic dissipative proprietary polyester glass
mat, which stays flat at high temperatures during the assembly process.
The static control feature of Durapol LR-A allows for the draining of
electrostatic discharge during processing.
Durapol LR-A is a high strength, high temperature composite material
specifically designed with a technically advanced proprietary polyester
resin to withstand the harsh environment of the wave solder process.
Subjected to high heat, Durapol LR-A will maintain dimensional stability,
flatness and will not warp.
Durapol LR-A has superior machinability to alternative metal and epoxy
resin materials. This allows for easier fabrication of the solder pallet
to exact specifications with tight tolerances.
Typical properties of the composite include:
Density..............................................
1.8 - 1.9 g/cm3
Water absorption.....................................
< .18%
Average Coefficient of Linear Expansion
a) Perpendicular to the layers.......................
60 - 70 x 106 m/mK
b) Parallel to the layers............................
~ 15 x 106 m/mK
Surface Resistivity..................................
105 - 109 Ohms
Thermal Conductivity.................................
.3 W/mK
Thermal Decomposition Temperature....................
> 370° C
Short Term Temperature Capacity......................
300° C
Long Term Temperature Capacity.......................
200° C
Flexural Strength MPa................................
350 N/mm2
Compression Strength MPa.............................
500 N/mm2
Chemical Resistance..................................
Excellent
Color................................................
Black
Thickness............................................ 3-10 mm
Tolerances* ± .10 mm ± .05 mm Above 10 mm
Parallelism ± .15 mm ± .08 mm
* ground on both sides
All of the information, suggestions, and recommendations pertaining to the properties and
uses of the product described herein are based upon tests and data delivered to be accurate;
however, the final determination regarding the suitability of any material described herein
for the use contemplated and the manner of such use, is the sole responsibility of the user.
THERE IS NO WARRANTY, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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