Engineered mesh for polymer melt filtration
Maintain steady melt flow and clean particle retention under high extrusion pressures. We manufacture precision stainless steel wire weaves, sintered laminates, and framed screen packs designed for blow molding, film casting, fiber spinning, and resin compounding.
Polymer melt filtration process guide
Select the right alloy, weave specification, and micron rating for continuous extrusion stability, minimal pressure drop, and clean resin output.
Polymer extruders exert sustained heat and hydrostatic pressures exceeding 200 bar. Choosing the exact grade preserves structural weave aperture without wire elongation.
Melt viscosity demands robust woven structures. Dutch weaves and sintered composite packs resist high shear stresses without aperture deformation or wire migration.
Polymer purity depends on capturing both rigid solids and deformable gel particles before the melt stream reaches spinning nozzles or extrusion dies.
Polymer-specific mesh recommendation matrix
Verified operational parameters across continuous screen changers and melt blown systems.
| Polymer Base | Thermal Window | Recommended Mesh / Weave | Micron Rating | Targeted Contaminants | Standard Alloy |
|---|---|---|---|---|---|
Polyethylene Terephthalate PET | 260°C – 300°C | 200 to 400 Mesh Twill Dutch | 20 – 40 µm | Degraded gels, crosslinked carbon, catalyst traces | AISI 316L / 310S |
Polypropylene & Polyethylene PP / PE / HDPE | 180°C – 240°C | 80 to 250 Mesh Plain Dutch / Square | 40 – 150 µm | Unmelted masterbatch, degraded fines, dust | AISI 304 / 316L |
Polyamide (Nylon 6 / 66) PA6 / PA66 | 240°C – 290°C | 250 to 500 Mesh Multi-layer Sintered | 10 – 25 µm | Thermal degradation particulates, carbon flecks | AISI 316L / Alloy 20 |
Polycarbonate / PMMA PC / PMMA | 250°C – 310°C | 150 to 325 Mesh Dutch Weave | 15 – 50 µm | Black specks, charred particles, oligomers | AISI 316L |
Fluoropolymers & High Performance PTFE / PEEK / PVDF | 320°C – 400°C+ | Sintered Porous Laminate / 5-Layer | 5 – 20 µm | High-heat degraded gels, corrosive byproducts | AISI 310S / Hastelloy C-276 / Inconel 600 |
Typical 5-layer screen pack cross-section
Symmetrical and graduated mesh layering prevents hydraulic collapse under viscous polymer shear loads.
Extrusion troubleshooting and process FAQ
Critical factors affecting mesh service life, clean Delta P margins, and resin yield.
Need custom mesh packs or delta P calculations for your polymer line?
Our engineering team validates wire diameter, open area percentage, and alloy suitability for your specific melt temperature and viscosity curve.