Multilayer screen packs
Multilayer screen packs combine a filtering mesh with selected support and drainage layers in one installable assembly.
Product detailsDrawing-based manufacturing
Screen packs
Multilayer extruder screens with loose, spot-welded or rimmed edges. Round, annular and kidney-shaped packs combine a fine separation layer with support layers that fit the breaker plate or screen changer.
- Construction
- Loose layers · spot welded · rimmed
- Stack
- Layer order follows the flow direction
- Fit
- Cavity outline and total pack thickness
Metal filtration componentsScreen pack configurations
Choose by installed outline
Screen pack configurations
Start with the cavity shape and changer interface, then define layer sequence, support and joining method.
Screen packs
Find a product
3 products
Kidney-shaped screen packs
Non-circular multi-layer pack for kidney-shaped breaker-plate seats.
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Clear filters
Specify the complete screen-pack stack
More layers do not automatically mean finer filtration.
Layer schedule
List each layer from upstream to downstream: weave, mesh count, wire diameter and material.
Changer cavity
Provide outside profile, centre hole, seating land and maximum finished stack height.
Melt conditions
Include polymer, recycled content, throughput in kg/h, melt temperature and contaminant type.
Pressure trend
Record differential pressure at clean start and at changeover at comparable throughput and temperature.
Construction
Filtration layers and breaker-plate support
- Fine layerThe finest selected layer provides the main geometric barrier. It must be supported against the load generated as contamination accumulates.
- Support layerA coarse backing screen bridges breaker-plate openings. Too little support can let fine cloth deform into plate holes.
- Pack handlingSpot welds retain order; rims contain the perimeter. Neither format justifies a different micron rating unless the media construction changes.
01Fine layer
02Support layer
03Pack handling
Compare screen packs
Multilayer extruder screens with loose, spot-welded or rimmed edges. Round, annular and kidney-shaped packs combine a fine separation layer with support layers that fit the breaker plate or screen changer.
| Construction | Application and fit | Confirm first | Find a product |
|---|---|---|---|
| Round screen packs | The installation uses a round cavity and defined outside diameter. | OD, layer sequence, orientation, support and thickness. | Filter matching products |
| Kidney and oval packs | The screen changer uses a kidney, oval or similar cavity. | Controlled outline, orientation, layer sequence and locating features. | Filter matching products |
Screen packs
Applications
Screen-pack design follows the polymer line and changer.
Film extrusion
Retain contamination that causes film defects while controlling melt pressure.
Recycling and compounding
Use pressure trends to distinguish loading from a change in melt viscosity.
Pelletizing
Match the changer cavity and stack support to stable melt delivery.
Check the pack as a stack
Layer identity and order are as important as the outer profile.
01Layer scheduleVerify count, sequence, weave and wire diameter.
02RegistrationCheck alignment of centre holes, kidney profiles and the rim.
03Installed heightMeasure assembled thickness including welds or edge rings.
Screen packs
Technical resources
Technical guide
Screen packs for polymer melt filtration
A polymer melt screen pack removes unwanted solids or gels from the melt and supports stable operation through the breaker plate or screen changer. The pack must fit the equipment, survive the pressure and temperature conditions, and provide the required balance between retention, throughput and change interval.
Read guide→Technical guide
Woven mesh aperture and open area
Select wire diameter and clear opening together; mesh count alone does not define either aperture or flow area.
Read guide→Screen packs
Questions before ordering
Which layer faces the incoming melt?
Use the approved upstream-to-downstream layer schedule. A coarse upstream protective layer and a downstream support layer have different jobs; copying a stack without flow direction can reverse those jobs.
What causes a rapid pressure rise?
Contamination loading, a colder or more viscous melt, reduced open area, an incorrect stack or restricted breaker-plate flow can all contribute. Compare temperature and throughput before changing the mesh.
Are three or five layers always required?
No. Each layer should have a purpose: separation, protection, drainage or support. The changer and melt duty determine the stack.
How should the layer sequence be supplied?
List each layer from upstream to downstream with mesh grade and diameter, or send an approved physical stack. Include breaker-plate dimensions and the retention method.
Related products and guidance
Technical enquiry
Define the dimensions, media, joints and inspection records before confirming the order.