A gel you did not filter shows up as a defect on the customer's surface.
Agglomerates, gel bodies and dust that pass the filter end up in the can, the spray gun or the printed film, where the complaint lands on the manufacturer. Solvents and elevated temperatures soften media built for water. Gopani matches the bag or cartridge to the solvent, the temperature and the pigment size, and to your cost per batch.
Where does a coatings plant filter?
Before filling and packaging
Pigment agglomerates, gel bodies and oversize particles taken out before paint and ink go into the container.
Resins, varnishes and lacquers
Polymer dispersions, polymerisation batches, monomer purification and paint coagulates.
Solvent and carrier clarification
Solvents and carriers cleaned before they meet pigment, and water-based paint process water.
E-coat and CED paint shops
Electrocoat bath filtration in the paint shop, at the temperatures those baths run.
Mixers and pumps
Dust and organic matter removed so they do not reach mixers, pumps and the finished film.
Recirculation and straining
Pre-fill and recirculation straining where reusable mesh can replace a disposable element.
Which media for which duty?
| Duty | Gopani range | Why it fits |
|---|---|---|
| Inks, paints, resins and hot solvent streams | ClaryFil PE polyester felt bags | Handles solvent content and higher temperatures than PP; up to 130 C with a stainless steel ring |
| Acidic or aqueous coating chemicals | ClaryFil PP polypropylene felt bags | Resists acids, alkalis and most aqueous solutions; to 80 C |
| Coarse agglomerates, straining, recirculation | ClaryFil NMO nylon mesh bags | Washable and reusable; lower cost per cycle on coarse duty |
| Gels and agglomerates on finer duty | Clarypleat TMP thick media pleated, RO Protect DPP depth pleated | Surface and depth filtration in one element |
| Pigment particles before filling | Clarywound string wound cartridges | Depth media that protects mixers, pumps and the final film |
| Oil and grease in process liquids | ClaryFil oil-adsorbing bags | Removes oil contamination from liquids including paints |
| Stitch-free construction | Fully welded PP and PE felt bags | No needle holes for bypass or fibre migration |
Micron rating is matched to your pigment particle size in engineering review.
Products for paint, ink and coating plants
Paint and coating filtration: direct answers
PP or polyester bags for paint?
Polyester (ClaryFil PE) where the stream carries solvent or runs hot, including inks, paints, resins and hot oils where polypropylene would soften; with a stainless steel ring it is rated up to 130 C. Polypropylene (ClaryFil PP) where the chemistry is acidic, alkaline or aqueous and the temperature stays within 80 C.
Can mesh bags really be reused on paint duty?
Yes, on coarse duty. A nylon mesh bag can be back-flushed, rinsed with water or solvent, or cleaned ultrasonically and put back into service, which makes each cycle cheaper than a disposable felt bag where the contaminant is large, such as paint agglomerates.
Why does welded construction matter in coating filtration?
Stitched seams leave needle holes that liquid can bypass and that can release fibres. ClaryFil PP and PE felt bags are fully welded at the bottom, seam and collar, which is why they are specified for precision-coating duty.
Send us the defect and the formulation class.
Solvent or water-borne, temperature, pigment size, batch size and the defect you are seeing. We will recommend media, micron rating and format, and the cost per batch against what you use today.