On this blog before, we have discussed the benefits of having a silicone-free thermal pad, and why some applications require there to be no silicone in their application. Of course, silicone-based products can be insidious to applications without immediate obvious side effects. In that blog, we discussed thermal gap pads which are conventionally thicker options that were alternatives to silicone-based gap pads. In this blog, we will discuss some of the thinner options that are polyester-based.


polypad thermal interface material die-cut

Sil-Pads are normally used in applications that can offer lots of compression via screws, or clips but also require thermal conductivity. In these applications, normally there are small gaps that need to be filled. In these small gaps, there are many thin options to place in there. There are two types of categories that thin thermal pads are really split up into. Non-Electrically Isolating, and Electrically Isolating. The problem is, most electrically isolating pads are silicone-based. However, Poly-Pad is not silicone-based.

What is Poly-Pad?

Henkels’ Bergquist offers a polyester-based thermal pad that is electrically isolating called Poly-Pad. These pads offer a good alternative to silicone-based pads. The reinforcement of these pads vary, both fiberglass or polyimide reinforcements are available. Fiberglass reinforcement offers significantly tougher physical properties. These pads similar to other Sil-Pad offerings have the rating of UL 94 V0. Henkels’ Bergquist offers a number of different selections to fit into applications:

Different Types of Polyester-Based Thermal Pads


-Poly-Pad 400-fiberglass(0.9 W/m-K) aka SIL PAD TSP PP900

-Poly-Pad 1000-fiberglass(1.2 W/m-K) aka SIL PAD TSP PP1200

-Poly-Pad K10-polyimide(1.3 W/m-K) aka SIL PAD TSP PPK1300

-Poly-Pad K4-polyimide (0.9 W/m-K) aka SIL PAD TSP PPK900

NEDC offers Henkels’ Bergquist Poly-Pads in sheet form or also in custom die cut shapes. Similar to their Sil-Pad counterparts, Poly-Pads offer adhesive-backing for ease in assembly. For more information on polyester-based thermal pads, or you believe you have an application that could utilize a thermal pad, please contact sales@nedc.com.

Poly-Pad 400 Datasheet Download

Poly-Pad 1000 Datasheet Download

Poly-Pad K10 Datasheet Download

Poly-Pad K4 Datasheet Download

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