PU Sponge

A cellular polyurethane elastomer, ether- or ester-based, with a density of about 20–120 kg/m³, pores of about 100–1,000 µm and a softness of about 10–70 Shore 00. Open-cell grades absorb water freely and squeeze out easily.

In our range: sponge bottle and cup brushes, small container bottle brushes, long-handle baby bottle brushes with sponge tips, sponge window brushes, toilet ceramic body brushes, ceramic substrate rollers, etching line brushes, card reader slot cleaners, and the sponge side of surgical hand scrub brushes.

Ether-based foams resist water and hydrolysis and microbial attack better, so they suit wet cleaning. Ester-based foams resist oils and some solvents better but break down in hot water over time. Tell us whether the sponge sits in water or meets oils and solvents.

It is formulation-specific; data quote about -20 to 90°C. The foam grade, the adhesive that holds it and the finished brush set the real limit, so check them for hot water or dishwasher use.

It wears faster than filament, tears on sharp edges and rough surfaces, and solvents, strong cleaners and heat shorten its life. For abrasive scrubbing, use filament or melamine foam.

The surface, the cleaner and temperature, the sponge softness and pore size if known, and the head shape and size. For bottle brushes, the neck and body sizes of the bottle as well.