PPSchaum

PPSchaum refers to a class of polymer foams based on polyphenylene sulfide (PPS), and in some cases blends with polypropylene (PP) resins. The term denotes a high-temperature, chemically resistant foam material used when conventional foams such as polyurethane do not meet performance requirements. PPS foams are produced by foaming a PPS melt or blend using chemical blowing agents or physical gas expansion, and they can be fabricated by extrusion, injection molding, or film blowing. The cell structure is typically closed, offering low density, good thermal insulation, and moisture resistance; blends may yield more open-cell characteristics for energy absorption.

Key properties include high thermal stability, excellent chemical resistance, inherent flame retardancy, and dimensional stability at elevated temperatures. They also provide good mechanical strength for a given density, though cost and processing complexity are higher than for standard foams. Densities vary with formulation, and processing requires specialized equipment and control of cell size.

Applications span aerospace and automotive components, electrical and electronic insulation, piping or device insulation, protective packaging for high-value parts, and seals or gaskets designed for high-temperature environments. Environmental considerations depend on formulation and end-of-life options; recyclability may be limited for some PPS foams, though mechanical recycling and energy recovery are pursued where feasible.