MaterialNatural and Soft Fibers
PU Foam
Polyurethane porous material
PU foam is polyurethane in open- or closed-cell form, used where a brush needs compliant wiping, absorbing or cushioning contact. Its density, hardness and compression recovery vary widely by grade, so they are specified rather than assumed.
What is PU foam?
A cellular polyurethane with a density of about 20–200 kg/m³, a softness of about 10–80 Shore 00 and a compression set of about 5–25% depending on grade. Open-cell foam absorbs; closed-cell foam cushions and seals.
Where is PU foam used?
In our range: the 300 mm PU foam absorbent disc brush, card reader slot cleaners with a thin foam head that follows the card path, and sponge bottle and cup brushes.
PU foam or PU sponge?
The terms overlap. In our range, sponge usually means the soft, open, absorbent grades on cleaning heads; foam covers the full range, including firmer and closed-cell grades for pads, discs and cushioning.
How hot can it run?
About -20 to 80°C as a general guide; some grades are quoted up to about 100°C. Check the grade and the adhesive for heat.
Where does PU foam fall short?
It is not for strong solvents or abrasive finishing without grade data, and it compresses over time, especially under load and heat.
What should you tell us?
The job, open or closed cell, the density or softness, the thickness and shape, the liquids, and the temperature. For discs, the machine and its drive fitting too.
Questions buyers ask about PU Foam
Open-cell or closed-cell foam?
Open-cell absorbs and wipes; closed-cell cushions and seals without soaking up liquid.
What is a PU foam disc brush used for?
Absorbing and wiping liquid across a surface under a machine, rather than scrubbing it.
How hot can PU foam get?
About -20 to 80°C in general, with some grades rated higher. Check the adhesive too.
Guides that go deeper on this
We have not written a guide specific to this one yet. The material that covers selection, filament, dimensions, maintenance and sourcing is collected in the technical resources library.
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Recommended Reading & Related Brush Resources
300mm PU Foam Absorbent Disc Brush
300mm PU foam absorbent disc brush for industrial machines. Removes water, coolant and oil films without scratching.
See the specification
Card Reader Slot Cleaning Brush
A thin polyurethane sponge head follows the card insertion path, clearing dust and oxide film from magnetic heads and EMV contacts without shedding.
See the specification
Sponge Bottle & Cup Cleaning Brush
Non-scratch PU or PVA sponge cleaning brush for cups, mugs, water bottles and travel tumblers. 20–70 mm heads on 200–450 mm handles.
See the specification
Custom Disc Brushes
A disc brush works with its flat, circular face: it spins on an axis at right angles to the surface and scrubs, polishes or deburrs everything under that face.
See how this type is builtCustom Manufacturing RFQ
Discuss This Material
Share what the brush works on, the temperature and chemicals it meets, the form you need — strip, disc, roller or hand brush — the quantity and a drawing or photo.
We reply to every request within 24 hours, with a quotation or with the questions we need answered first. If the brush can be made on our existing tooling, we make the sample directly. If it needs new tooling, we quote a sample fee and a tooling fee, and the sample fee is credited against the bulk order. Need an NDA first? We sign yours before you send drawings, and the files you send are never shown to other customers.
- MOQ500 pcs for small hand-held brushes, 100 pcs for medium and large ones
- SampleTypically 3–7 days
- ProductionFrom 7 days after sample approval, by size and quantity
- Payment30% deposit and 70% before shipment above US$10,000; smaller orders on agreed terms
“We need a brush to remove wet residue from a stainless steel conveyor, about 800mm wide. The current brush wears quickly. We can send photos.”
“We sell drinkware and need a cleaning brush to include with the product. Quantity around 5,000 pieces.”