Soft Urethane and Firm Urethane Shock Foam

Soft & Firm Urethane Shock Foam

Soft Compressible Foam.

Reacts Like Stiff Foam on Impact.

Enviromentally Friendly.

UL94 HF1.

Special Electronics Grade Foam.

Shock protection for fragile components like disk drives, LCDs, and PCBs in handheld, truck, bus and avionic mounted devices. Ideal for knock and drop protection and vibration isolation.

Most resilient foams when further compressed become harder and push back at whatever is compressing them. At a certain point all the cells collapse and the foam becomes solid. These properties can be useful but cannot meet the requirements of applications where high compressions are necessary to fit into small gaps. Nor can they meet space filling needs when tolerance stack ups i.e variable topography produces and inconsistent gap.

For these applications a soft foam with stress relaxation properaties is much more desirable. The foams are designed to compress and conform under sustained pressure and slowly rebound when the weight is released. But when the foams receive a direct impact they behave like semi rigid foams, resist collapse and absorb the weight internally. Available in four stiffnesses, recognized UL94 HF-1 by Underwriter’s Laboratory at 2-mm, the special PCB version meets at a thickness of 1mm. Also see our soft gel sheet for narrow space protection.

Material Properties:

These foams are formulated without metallic or halogenated flame retardants. The formulations also have no silicone off-gassing. Ideal for shock and padding protection in electronics applications. There is also a special foam version for PCBs, used as a self moulding shock pad between the board and hard drive. The foam has a density of 4pcf rather than the standard density of 6 pcf plus very low compression force delfection values. The foam exerts little return pressure that could bend the boards and intefere with performance. It also has low surface tack which makes stacked die cut parts easy to separate and install.

04/2011 Elite EMC Ltd E & OE

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