Our filter foam block/bun is a high-performance open-cell polyurethane medium, available in 10–60 PPI grades. With a stable porous structure, it traps particles while maintaining smooth flow. Durable, customizable, and safe, this foam block/bun is widely used in aquariums, water treatment, air purification, and industrial filtration.
Uniform Structure of the Foam Block/Bun
Our filter foam block/bun features a precisely controlled open-cell structure, ensuring consistent porosity and reliable filtration efficiency across the entire medium.
Resilient Durability of the Foam Block/Bun
Made of premium polyether/polyester materials, the foam block/bun resists compression, deformation, and degradation, maintaining its shape even after repeated cleaning.
Customizable Foam Block/Bun Specifications
We offer full customization of the foam block/bun, including size, thickness, PPI rating, and shape, to fit diverse filtration system requirements.
Safe & Eco-Friendly Foam Block/Bun
The foam block/bun is low-VOC, non-toxic, and odorless, complying with international safety standards for use in sensitive environments.
Cost-Effective & Versatile Foam Block/Bun
Reusable and easy to maintain, the foam block/bun is produced at scale for competitive pricing, ideal for both household and industrial applications.
Description | Polyurethane filter foam block |
Size | Standard bun size 1000*2000*725mm or Custom-made |
Aperture | 10PPI-60PPI |
Density | 22KG/M3±1 25KG/M3±1 30KG/M3±1 |
Tolerance on length and width | ±2MM is eligible |
Tolerance on thickness | ±1MM is eligible |
Primary materials | Polyether polyol,Stronge Polyether polyol,MDI,TDI,Silicon,cpd.,coloring matter and so on. |
Tolerance on aperture | ±3PPI |
Temperature used | －50℃＋50℃ |
Good resistance in acid and alkali | The range of PH :5.0-8.0 |
Aquarium Filtration
The filter foam block/bun is used in aquarium filters to trap debris and support beneficial bacteria growth.
Water Treatment Systems
The foam block/bun serves as a medium in sewage treatment, biofilters, and water purification processes.
Air Purification & HVAC
The foam block/bun filters dust and particles in air purifiers, ventilation systems, and air conditioning units.
Industrial Filtration
The foam block/bun is applied in industrial equipment and pumps to prevent clogging and protect machinery.
Q:What is the standard size of your filter foam blocks/buns? Can we customize them?
A: We offer standard foam blocks/buns in common sizes(2M*1M*725mm), and fully support custom dimensions, thickness, and PPI (10–60) to fit your equipment and projects.
Q: Can the filter foam block/bun be compressed for transportation to save space?
A: Yes. Our filter foam blocks/buns are flexible and resilient. They can be safely compressed and vacuum-packed for shipping, and will fully recover their original shape and performance once unpacked.
Q: What is the density of the filter foam block/bun?
A: Our filter foam blocks/buns are available in densities tailored to your needs, typically ranging from 18kg/m³ to 35kg/m³. The density can be adjusted based on your application.
