Construction and filtering function
A screen pack combines a retaining layer with protective, drainage and support layers. The drawing assigns a function and upstream-to-downstream position to every layer.
Screen packs
Multilayer screen packs
Multilayer screen packs combine a filtering mesh with selected support and drainage layers in one installable assembly. The layer sequence is designed around the process, pressure direction, equipment interface and handling method rather than a fixed number of screens.
Metal wire mesh- Upstream protective layer
- Faces the incoming melt or process stream
- Control layer
- Weave, mesh specification and wire diameters
- Downstream support layer
- Supports control mesh over breaker-plate openings
- Layer retention
- Loose, spot-welded or perimeter-joined assembly
Share a drawing, reference sample or application requirements to discuss the configuration.
Product images
Multilayer screen packs — Product view
Product details
Installation and fit
Provide screen-changer or breaker-plate dimensions, pack outline, holes, total thickness and flow direction. Identify the current sequence when requesting a replacement.
Operating conditions and maintenance
For polymer service, include resin, recycled content, additives, melt temperature, throughput and the pressure trend. Compare replacement intervals under the same process conditions.
Assembly inspection
The inspection record identifies the material, finished dimensions, joining surfaces and sealing interfaces. Measurements follow the installed geometry and the stated test conditions.
Integration with the filter assembly
A screen-pack drawing lists every layer from the feed side to the breaker plate. Coarse protective layers intercept large debris, the control mesh performs the specified screening, and downstream coarse layers support that mesh over the plate openings. Spot welds retain layer order during handling; a loose stack retains the same specified order within its holder. Woven square mesh and Dutch-weave cloth are identified by their own weave and wire specification. A continuous reverse-Dutch belt belongs to a moving screen changer, while a discrete pack fits a defined pocket and replacement sequence.
Screen packs inside polymer spin packs
In melt spinning, a spin pack is the assembled unit that distributes and filters polymer before the spinneret; a screen pack is the layered wire-mesh filtering or support insert inside that unit. Order the insert by its finished outline, centre openings, inlet-to-outlet layer sequence, each layer’s mesh count and wire diameter, assembled thickness and edge retention. The spin-pack drawing supplies the seating recess and contact faces, including the position of any adjacent granular medium or sintered insert. These dimensions identify the replacement screen pack within the complete spinning assembly.
Assembly interface map
Assembly interface map
| Component / interface | Defined function and inspection |
|---|---|
| Upstream protective layer | Faces the incoming melt or process stream |
| Control layer | Weave, mesh specification and wire diameters |
| Downstream support layer | Supports control mesh over breaker-plate openings |
| Layer retention | Loose, spot-welded or perimeter-joined assembly |
| Changer interface | Pack outline, thickness, seating and flow orientation |
Multilayer screen packs — Inlet-to-outlet mesh sequence
Multilayer screen packs — Inlet-to-outlet mesh sequence
| Inlet-to-outlet mesh sequence | Controlling mesh / inch | Wire diameter (mm) | Clear aperture (mm) |
|---|---|---|---|
| 20 / 40 / 20 | 40 | 0.254 | 0.38 |
| 40 / 80 / 200 / 80 / 40 | 200 | 0.0533 | 0.0737 |
Mesh sequences run from inlet to outlet. The table specifies the controlling square-weave layer; every protective and backing layer retains its own wire diameter. The rim and changer pocket determine finished pack dimensions.
Ordering and production
Ordering and production
| Supply item | Order basis |
|---|---|
| Production lead time | 2–3 weeks after order and drawing confirmation. |
| Trial orders | Small trial quantities for fit and process evaluation. |
| Regular production orders | 50 pieces or US$3,000 per order. |
| Quotation basis | Material, finished dimensions, filter construction, connections and quantity. |
Specifications
| Parameter | Specification | Notes |
|---|---|---|
| Upstream protective layer | Faces the incoming melt or process stream | — |
| Control layer | Weave, mesh specification and wire diameters | — |
| Downstream support layer | Supports control mesh over breaker-plate openings | — |
| Layer retention | Loose, spot-welded or perimeter-joined assembly | — |
| Changer interface | Pack outline, thickness, seating and flow orientation | — |
| Component materials | 304 / 316L stainless steel; each filtering, support and end component has its own material designation. | — |
| Displayed configuration | 3 | 20 / 40 / 20 |
| Three-layer build | 20 / 40 / 20 mesh | — |
| Five-layer build | 40 / 80 / 200 / 80 / 40 mesh | — |
| Illustrated pack diameter | 3.661 in | Geometry of the illustrated construction; finished dimensions follow the equipment interface drawing. The 3.661 in format belongs to the 20/40/20 three-layer configuration. Each mesh has its own wire diameter and weave. |
Selection guide
Include these details when discussing your requirements.
View specifications- Filter media
- Specified retention mesh with protective or support layers
- Layer arrangement
- Upstream-to-downstream sequence defined on the drawing
- Edge finish
- Loose stack, joined perimeter or rimmed construction
- Dimensions
- Provide screen-changer or breaker-plate dimensions, pack outline, holes, total thickness and flow direction. Identify the current sequence when requesting a replacement.
- Service conditions
- For polymer service, include resin, recycled content, additives, melt temperature, throughput and the pressure trend. Compare replacement intervals under the same process conditions.
Production details and documented projects
Mesh blank cutting
Provide screen-changer or breaker-plate dimensions, pack outline, holes, total thickness and flow direction. Identify the current sequence when requesting a replacement.
Applications
Plastic extrusion
Layered screens matched to the melt path, screen changer and breaker plate.
Recycling lines
Review contaminant load and pressure rise alongside the selected retention layer.
Process filtration
Compact layered elements where the equipment provides a defined seat and support.
Frequently asked questions
How are the assembly components identified?
Upstream protective layer: Faces the incoming melt or process stream; Control layer: Weave, mesh specification and wire diameters; Downstream support layer: Supports control mesh over breaker-plate openings; Layer retention: Loose, spot-welded or perimeter-joined assembly; Changer interface: Pack outline, thickness, seating and flow orientation
Which installation details define this product?
A screen-pack drawing lists every layer from the feed side to the breaker plate. Coarse protective layers intercept large debris, the control mesh performs the specified screening, and downstream coarse layers support that mesh over the plate openings. Spot welds retain layer order during handling; a loose stack retains the same specified order within its holder. Woven square mesh and Dutch-weave cloth are identified by their own weave and wire specification. A continuous reverse-Dutch belt belongs to a moving screen changer, while a discrete pack fits a defined pocket and replacement sequence.
What does the finished-part inspection cover?
The inspection record identifies the material, finished dimensions, joining surfaces and sealing interfaces. Measurements follow the installed geometry and the stated test conditions.
Explore related products and technical guidance.
Related products and guidance
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Kaifil supplies stainless steel reverse Dutch weave belts for continuous polymer filtration.
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Rimmed extruder screen packs
Rimmed woven screen packs for melt filtration.
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Kidney-shaped screen packs
Non-round woven packs for screen-changer pockets.
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Wire mesh filter discs
Kaifil cuts woven wire cloth into round, annular and drawing-defined filter inserts.
View detailsTechnical enquiry
Define the dimensions, media, joints and inspection records before confirming the order.