Metal Filters for Polymer Melt Filtration and Plastic Extrusion
Filtalloy manufactures metal filter elements, extruder screen packs, reverse Dutch weave belts and leaf disc filters for polymer melt filtration. We supply drawing-defined components for plastic extrusion, pelletizing, recycling and melt-spinning equipment.
Selection starts with the polymer, melt temperature, viscosity, throughput, contamination and equipment interfaces. The filter must balance retention, pressure drop, available area and cleaning or replacement requirements.
Plastic Melt Filtration: Applications and Component Selection
- Film, sheet, profile and tube extrusion: screen packs or specified filter elements for particulate retention before downstream forming.
- Plastic recycling: select the screen structure against contaminant loading, variable feedstock and the screen-changer arrangement.
- Pelletizing and masterbatch: provide polymer grade, additives, throughput and the particles that must be retained without removing required formulation components.
- Melt spinning: spin-pack screens and polymer filter components made to the equipment envelope, retention and pressure requirements.
- Hot melt adhesives: review viscosity, temperature, contamination and cleaning compatibility for the actual formulation.
Mesh Opening Is Not the Complete Filtration Specification
Specify mesh counts, wire diameters, weave, layer order and support structure together. A nominal micron rating must include its definition and acceptance method; it is not automatically equivalent across woven mesh, sintered mesh and sintered metal fiber felt.
Polymer Filter Components
Solid contamination and deformable gels require different evaluation. Gel passage depends on its properties, melt conditions and filter structure. A finer mesh alone does not guarantee removal of every gel or prevent defects caused by polymer degradation.
Polymer Filter Elements
Polymer filter elements using the specified woven mesh, sintered mesh or sintered metal fiber felt construction. Area, supports, joints and interfaces follow the drawing and melt duty.
Extruder Screen Packs
Round or custom-shaped extruder screens with agreed weave, layers and edge construction. Match the screen pack to the breaker plate and screen-changer dimensions.
Polymer Leaf Disc Filter
Leaf disc components for suitable polymer filtration equipment. Define media, disc geometry, supports, central interfaces and sealing requirements for the assembly.
Reverse Dutch Weave Mesh Belts
Continuous woven mesh belts for compatible screen-changer systems. Specify belt width, length, weave, filtration requirements and equipment feeding conditions.
Spin-Pack Screens
Drawing-defined screen packs for melt-spinning equipment. Supply dimensions, layer construction, edge details, retention and maximum differential-pressure conditions.
Discuss Your Polymer Melt Filter Requirements
Information Needed for a Melt Filter
- Polymer grade, recycled content, additives and contaminant type.
- Normal and peak melt temperature, viscosity information and throughput.
- Required particle retention or product-quality target and acceptance method.
- Operating pressure separately from maximum filter differential pressure.
- Available filter area, dimensions, supports, seals and screen-changer interfaces.
- Cleaning method, replacement cycle and permitted reverse-flow conditions.
- Material, drawing tolerances and required inspection documents.
Cleaning and Replacement
Cleaning methods must suit the polymer residue, alloy, media and assembly. Solvent, ultrasonic, chemical or thermal procedures require review for the selected construction and equipment. Avoid assuming that every screen pack can be reused after cleaning.
Frequently Asked Questions
Can a fine screen remove every gel?
No. Gel deformation, melt conditions and media structure affect retention. Define the defect and evaluate the proposed construction under representative conditions.
How do I select an extruder screen pack?
Provide the polymer, contaminants, required retention, throughput and screen-changer drawing. Agree layer sequence, weave and supports together.
Does higher pressure drop mean better filtration?
Pressure drop reflects resistance and can increase as contamination accumulates. It must remain within equipment and element limits; it is not a standalone measure of filtration quality.
Can you reproduce a replacement belt or screen?
Yes. A drawing or sample supports review. Include weave, wire diameters, layer structure and operating requirements rather than dimensions alone.
Three Ways to Start Your Project
- Requirements-based customization: share the operating conditions and component function for a new project.
- Drawing-based customization: send the approved drawing, revision and acceptance requirements.
- Sample-based customization: arrange a sample for measurement and construction review, together with the original duty where available.
Use the form below to discuss your component requirements.
Applications
Product Inquiry
Send the polymer duty, filter drawing or replacement sample for manufacturing review.