Material
PVA Sponge
PVA Sponge is selected from its stiffness, recovery, wear, wet-service, chemical, and temperature behavior. Material name alone is not enough to set stiffness; we also need filament diameter, free trim, density, grade, and working conditions.
Material Overview
Industrial PVA sponge rollers are hydrophilic porous polymer bodies used for moisture removal, wiping, scrubbing and liquid transfer.
In a finished brush, PVA Sponge does not create a fixed stiffness by itself. Filament diameter, trim length, density, tuft layout, and installed contact determine working force, while grade and environment affect durability and recovery.
Material Properties
| Apparent density | 60–180 kg/m³ |
|---|---|
| Pore size | 60–500 µm |
| Water uptake | 5–12 times dry weight |
| Use temperature | 5–80°C |
| Compression set | low when kept conditioned |
Brush Applications
For PVA Sponge, directly related brush structures include Handheld Detail Brushes, Roller and Conveyor Brushes, and Tube & Pipe Bore Brushes. Applications related to PVA Sponge include PCB Cleaning, Connector & Slot Cleaning, Printer & Scanner Cleaning, and Semiconductor Wafer & Chip Cleaning.
Specification and Customization
Material form
Porous Sponge / Roller
Common forms
Sponge roller; sponge head.
Grade
Hydrophilic open-cell sponge grade
Reference standard
ISO 527-1:2019; ASTM D638; ISO 62:2008; ASTM D570-22; ISO 868:2003; ASTM D2240-15(2021); ISO 4892-3:2024; ASTM G154-23; UL 94
Limitations and Alternatives
Not for abrasive scrubbing or dry high-friction brushing.
Frequently Asked Questions
What are the key properties of PVA Sponge brush material?
Industrial PVA sponge rollers are hydrophilic porous polymer bodies used for moisture removal, wiping, scrubbing and liquid transfer. Direct data: Apparent density: 60–180 kg/m³; Pore size: 60–500 µm; Water uptake: 5–12 times dry weight; Use temperature: 5–80°C; Compression set: low when kept conditioned.
Where is PVA Sponge used in cleaning brushes?
Glass, PCB and precision wet cleaning or drying rollers that need high water uptake and uniform contact.
How does filament geometry change PVA Sponge brush stiffness?
PVA Sponge changes brush stiffness through filament diameter, free trim, density, crimp, and contact. Use finer filament and longer trim for conformable contact; use coarser filament, shorter trim, or higher density for stronger displacement or cutting.
When should PVA Sponge be replaced by another material?
Compare PVA Sponge with PU sponge, PP sponge, microfiber. Change material when wet stiffness, temperature, chemical resistance, conductivity, particle shedding, or surface marking becomes the limiting factor.
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