EMI shielding is high-volume and high-temperature applications

SOFT-SHIELD 4840 is an electrically conductive foam used for grounding in environmentally controlled applications. The optimal dispersion of conductive silver-plated nylon fibres embedded within a low-density urethane foam matrix means this material is electrically stable over many closure cycles, experiencing a low compression set.

Offering a more cost-effective alternative for customers, SOFT-SHIELD 4840 is said to be ideal for high-volume applications such as consumer devices and industrial electronics. It requires lower compression force but provides slightly lower conductivity (higher through resistance). The product has an operating temperature range of -40C to +70C.

SOFT-SHIELD 4860 is a true multi-planar electrically conductive foam for indoor applications. Based on the unique integration of electrically conductive silver-plated nylon fibres this time dispersed in a low-density silicon foam SOFT-SHIELD 4860 is the high-temperature, halogen-free version of SOFT-SHIELD 4850 and offers an operating temperature up to 125C. This performance-driven EMI shielding solution is also electrically stable over many closure cycles, undergoing a low compression set of less than 10%.

Both new products offer Z-axis electrical conductivity, low closure force, non-nickel bearing material, and compliance with RoHS, REACH and UL 94-V-0. While SOFT-SHIELD 4840 offers good through-resistance of less than 150 m, SOFT-SHIELD 4860 provides excellent through-resistance of less than 40 m (both at 30% gasket deflection). Similarly, the typical shielding effectiveness of SOFT-SHIELD 4840 is 60 dB, while SOFT-SHIELD 4860 provides 95 dB (both from 20 MHz to 10 GHz).

Both SOFT-SHIELD 4840 and SOFT-SHIELD 4860 are available with or without a conductive pressure-sensitive adhesive (PSA) in bulk rolls, cut sheets or custom die-cut shapes.