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.
What we did not discuss was thinner options that may be an alternative to the Sil-Pad materials. Sil-Pads are used in applications that can offer lots of compression via screws, or clips but also require thermal conductivity. In addition, these applications given their abundance of compression usually have thinner gaps to fill if any at all. There are two types of categories that thin thermal pads are really split up into. Non-Electrically Isolating Pads, and Electrically Isolating Pads. Non-Electrically Isolating Pads usually include graphite-based pads. The other grouping is usually silicone-based pads. However, 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 such as Sil-Pad. The reinforcement of these pads vary, both fiberglass or polyimide reinforcements are available. Fiberglass reinforcement offers a 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:
-Poly-Pad 400-fiberglass(0.9 W/m-K)
-Poly-Pad 1000-fiberglass(1.2 W/m-K)
-Poly-Pad K10-polyimide(1.3 W/m-K)
-Poly-Pad K4-polyimide (0.9 W/m-K)
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 thermal pads, or you believe you have an application that could utilize a thermal pad, please contact firstname.lastname@example.org.