Plastic Recycling Extruder Screen Packs
Plastic-recycling extruder screen packs combine defined woven wire mesh layers to retain label fragments, paper fibres, char, dirt and other unmelted solids from recycled polymer melt. Specify the recycled resin or blend, contamination, every mesh layer, flow direction, screen-changer fit, pressure conditions and planned change interval.
What a Recycling Extruder Screen Pack Must Control
Recycling contamination
Define the label, paper, char, dirt, metal or other unmelted contamination that the screen pack must retain.
Layer stability
Coarse layers or perforated supports can stabilize fine mesh under melt-flow loading.
Equipment fit
Diameter, profile, thickness and edge must match the breaker plate or screen changer.
Pressure and change interval
Balance finer retention against screen area, pressure rise, contamination loading and the planned pack-change method.
Plastic Recycling Screen Pack Specification Checklist
A request such as “80 mesh for recycled plastic” is incomplete. State resin or blend, contamination, pressure context and changer fit, then pair every mesh count with wire diameter or aperture and list the full upstream-to-downstream stack.
| RFQ field | Information to provide | Why it matters |
|---|---|---|
| Pack geometry | OD, ID if any, shape, thickness and tolerances | Controls fit and sealing in the changer |
| Each mesh layer | Mesh count plus wire diameter or aperture, weave and material | Defines opening, open area and strength |
| Layer sequence | Upstream-to-downstream order and flow direction | Prevents ambiguity in multilayer assembly |
| Edge construction | Plain cut, spot welded, bonded or rimmed | Affects handling, pack integrity and usable area |
| Recycling process | Recycled polymer/blend, contamination, temperature, pressure trend, changer and objective | Supports an appropriate construction review |
Recycling Screen Changer Interface and Layer Schedule
Write the screen pack as an ordered schedule rather than an unordered list of mesh counts. The same three layers assembled in reverse order can behave differently under the installed melt-flow direction. The screen changer drawing must control the pack profile, seat, usable area and allowable thickness.
| Schedule field | Example notation | Required clarification |
|---|---|---|
| Flow direction | Melt entry → exit | Mark the physical upstream side on the drawing |
| Layer 1 | Coarse protective mesh | Mesh count, wire diameter, weave and material |
| Layer 2 | Fine filtration mesh | Opening or rating basis plus full mesh construction |
| Layer 3 | Downstream support | Support type, orientation and attachment |
| Pack edge | Plain, spot welded, bonded or rimmed | Finished thickness, usable area and permitted projections |
| Changer fit | OD/profile, seat and clearance | Datums, tolerance, orientation feature and sealing/contact face |
Defined media and support layers
Finished rimmed screen packs
Single-Layer and Multilayer Recycling Packs
A single woven disc may suit relatively clean regrind and a compatible changer. A multilayer recycling pack can combine coarse protection, one or more filtration layers and downstream support where variable contamination and pressure loading require a defined stack.
The exact sequence is application-specific. Show flow direction and identify every layer on the drawing or purchase specification.
Mesh, Aperture and Weave Selection
Do not select by mesh count alone
For square woven mesh, clear aperture depends on both mesh count and wire diameter. The mesh-to-micron chart and calculator is a useful starting reference when these values are known.
Stainless steel wire mesh offers square-opening constructions, while Dutch weave wire mesh uses a different pore structure and should not be assigned a rating by a simple square-mesh formula.
Real Maidong Recycling Screen Pack Configurations
These real Maidong screen-pack products show mesh discs, rimmed packs and support combinations. They are construction examples, not claims that one layer schedule fits every recycled polymer, contamination level or screen changer.
Round rimmed screen pack production
Custom diameters and mesh grades
Drawing-Based Configuration Options
- Round, oval, rectangular or profile-cut shapes
- Single-layer or defined multilayer stacks
- Plain-cut, spot-welded, bonded or rimmed edges
- Coarse woven or perforated support layers
- Central holes, locating features or orientation marks
- Custom dimensions and tolerances from drawings
Recycling Screen Pack vs Other Polymer Filters
Extruder screen pack
Defined for contaminated recycled-polymer melt, with a controlled layer stack and screen-changer interface.
General wire mesh filter disc
A cut or edged mesh element used across many liquid, gas and equipment filtration duties.
Sintered filter disc
A diffusion-bonded porous structure selected when a rigid integrated laminate is required.
For the general product range, see custom extruder screen packs. Compare the broader stainless steel filter disc range and the rigid sintered wire mesh filter disc. For plastics processing context, see plastics and chemical fiber filtration applications.
How to Specify a Plastic Recycling Screen Pack
1. Define the process
State recycled resin or blend, source, known contamination, changer and operating conditions.
2. Fix the geometry
Provide diameter or profile, thickness, tolerances and interface drawing.
3. List every layer
Specify mesh count with wire diameter or aperture, weave and material.
4. Confirm the sequence
Mark flow direction, support layers and upstream-to-downstream order.
5. Complete the RFQ
Add edge construction, quantity, packaging and required documentation.
Use our screen pack drawing and RFQ checklist to prepare dimensions, the complete layer schedule and order quantities.
Plastic Recycling Extruder Screen Pack FAQ
It can mechanically retain defined label fragments, paper fibres, char, dirt, metal fragments and other unmelted solids larger than the effective pore path. It cannot correct polymer degradation, incompatible blends or dissolved contamination.
Start with the contamination and product-quality objective, then review polymer type, viscosity, throughput, screen-changer area, pressure trend and change interval. Mesh count alone is incomplete without wire diameter, weave and layer sequence.
A finer layer may provide the main retention function while coarser layers protect and support it. The required order depends on melt-flow direction, contamination, pressure loading and screen changer.
No. Finer media may raise pressure and shorten the change interval when contamination is high. Screen selection must balance retention, flow resistance, usable area and operating stability.
Yes. Round, oval, rectangular, kidney-shaped and drawing-specific profiles can be reviewed. Provide the changer cavity, seat, orientation features, thickness and tolerances.
Provide recycled polymer or blend, known contamination, target retention, process temperature, throughput or flow context, pressure trend or limits, changer drawing, each mesh layer, sequence, edge, dimensions, quantity and packaging.
Request a Plastic Recycling Screen Pack Quotation
Send the recycled polymer or blend, contamination, pack dimensions, complete mesh-layer sequence, flow direction, screen-changer details, pressure context, edge construction and quantity.