China Suppliers Paint Mist Collector Filter with Cardboard Frame | Efficient Environmental Friendly Kraft Paper Filter Factory
It is widely used in dry painting spray booths, dry painting systems for automobile, furniture, mechanical parts, and complex assemblies — paint mist filtration or dust collection filtration systems in workshops.
The filter media is the core component for capturing paint over spray, typically made of fluffy, porous materials with high dust-holding capacity. The main types are as follows:
📌 Characteristics: The most commonly used, classic paint filtration material.
✅ Advantages: High fire resistance rating (usually Class A non-combustible), moisture-resistant, chemically corrosion-resistant, high dust-holding capacity, stable efficiency.
🔷 Form: Usually a fluffy, white, cotton-like structure that effectively intercepts and absorbs wet paint particles.
📌 Characteristics: Such as polyester fiber (PET), etc.
✅ Advantages: Good toughness, potentially higher filtration efficiency, more environmentally friendly (some products are recyclable).
⚠️ Disadvantages: Generally inferior fire resistance compared to glass fiber (usually flame-retardant grade, not non-combustible).
📌 Characteristics: A blend of fibers of different thicknesses and materials to balance filtration efficiency, resistance, and dust-holding capacity.
| Component | Main Material | Key Characteristics |
|---|---|---|
| Frame | Special Kraft Paper / Cardboard | High strength, moisture-resistant, flame-retardant (treated), lightweight, low cost |
| Filter Media | Glass Fiber | Most common, fire-resistant (Class A non-combustible), moisture-resistant, high dust-holding capacity |
| Filter Media | Synthetic Fiber (e.g., PET) | High toughness, high efficiency, more environmentally friendly (note fire rating) |
When selecting, you need to focus on the following points:
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Fire Resistance Rating In environments like spray booths where sparks are a risk, Class A non-combustible glass fiber filter media is the preferred choice for the highest safety.
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Filtration Efficiency Choose filter media with different densities and structures based on the type of paint you are spraying (water-based / oil-based) and the required paint over spray capture efficiency.
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Dust-Holding Capacity A higher dust-holding capacity means a longer service life for the filter and lower replacement frequency, making it more economical in the long run.
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Moisture Resistance Especially in areas with high humidity or when using water-based paints, moisture resistance is crucial to prevent premature filter failure.
As dust accumulates on the filter media, the resistance increases. When the resistance reaches an unreasonable level, the filter must be discarded.
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Risk of Re-entrainment Sometimes, excessive resistance can cause previously captured dust to become dislodged and re-enter the airflow. When this risk arises, the filter should also be replaced.
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Airflow Rate & Resistance The resistance of a filter increases with higher airflow rates. By increasing the surface area of the filter media, the relative velocity of air passing through the filter can be reduced, thereby decreasing the resistance.
