insulator coated with a filled polyester

designed for most standard applications.

Polyester-based, thermally conductive

insulators from Bergquist provide a

complete family of materials for

silicone-sensitive applications.

Poly-Pads are ideally suited for

applications requiring conformal

coatings or applications where silicone

contamination is a concern (telecomm

and certain aerospace applications).

Poly-Pads are constructed with

ceramic-filled polyester resins coating

either side of a fiberglass carrier or a

a complete range of performance

characteristics to match individual

applications.

Note: To build a part number, visit our

website at www.bergquistcompany.com.

TYPICAL APPLICATIONS INCLUDE

• Power supplies

• Automotive electronics

• Motor controls

• Power semiconductors

CONFIGURATIONS AVAILABLE

• Sheet form, die-cut parts and roll form

• With or without pressure sensitive adhesive

• We produce thousands of specials. Tooling charges vary depending on

tolerances and the complexity of the part.

PDS_PP_400_January 2015

FEATURES AND BENEFITS

(@50 psi)

• Polyester based

• For applications requiring

conformal coatings

• Designed for silicone-sensitive

standard applications

PRODUCT DESCRIPTION

Polyester-Based, Thermally

Conductive Insulation Material

January 2015

PROPERTY

IMPERIAL VALUE

METRIC VALUE

TEST METHOD

Color

Tan

Tan

Visual

Reinforcement Carrier

Fiberglass

Fiberglass

—

Thickness (inch) / (mm)

0.009

0.229

ASTM D374

Hardness (Shore A)

90

90

ASTM D2240

Breaking Strength (lbs/inch)/(kN/m)

100

18

ASTM D1458

Elongation(% at 45° to Warp andFill)

10

10

ASTM D412

Tensile Strength (psi) / (MPa)

7000

48

ASTM D412

Continuous Use Temp (°F) / (°C)

-4 to 302

-20 to 150

—

ELECTRICAL

Dielectric Breakdown Voltage (Vac)

2500

2500

ASTM D149

Dielectric Constant (1000 Hz)

5.5

5.5

ASTM D150

Volume Resistivity (Ohm-meter)

ASTM D257

THERMAL

Thermal Conductivity (W/m-K)

0.9

0.9

ASTM D5470

Flame Rating

V-O

V-O

U.L. 94

THERMAL PERFORMANCE vs PRESSURE

Pressure (psi)

10

25

50

100

200

TO-220 Thermal Performance (°C/W)

5.85

5.61

5.13

4.59

4.12

1.62

1.35

1.13

0.86

0.61

1) The ASTM D5470 test fixture was used. The recorded value includes interfacial thermal resistance. These values are provided for

reference only. Actual application performance is directly related to the surface roughness, flatness and pressure applied.

TYPICAL PROPERTIES OF POLY-PAD 400