“Nylon filter mesh” is a product family description, not a complete polymer specification. PA6 and PA66 are distinct polyamide types. If a replacement or OEM component requires a particular type, put that requirement on the RFQ and ask the supplier to identify the offered finished fabric.
Begin with the nylon filter mesh commercial page. This guide concerns polymer identity and qualification. It does not claim that INCE stocks every PA6 or PA66 construction, uses a named resin brand or can substitute the two without approval.
Identify the polymer before comparing mesh geometry
PA6 is commonly called nylon 6; PA66 is also written PA6.6 or nylon 6,6. These labels identify the polymer family, while a supplier’s finished-fabric reference identifies a particular woven construction. Neither should be omitted when material identity matters to the application.
BASF, for example, distinguishes its Ultramid B PA6 and Ultramid A PA66 resin families and lists grades used in monofilament applications. Sefar identifies polyamide 6.6 in a particular finished-mesh product range. Those examples demonstrate the value of explicit identification; they do not establish the resin source or approvals of INCE mesh.
Do not use melting point as a mesh operating rating
The distinction matters when reviewing temperature figures. BASF lists a melting point of 220°C for its B27 E PA6 resin and 260°C for its A27 E PA66 resin. Both are identified resin examples, not continuous wet-service ratings for finished filter mesh.
| Published information | What it describes | What the purchaser still needs |
|---|---|---|
| Resin melting point | A property of the identified resin grade | Permitted conditions for the finished mesh and assembly |
| Polymer family: PA6 or PA66 | Material identity at family level | Exact fabric construction and any material-specific requirements |
| Fabric opening and thickness | Geometry of the offered mesh | Measurement basis, tolerance and application suitability |
| Finished-part data | A particular component construction | Evidence that it fits and performs under the intended duty |
Ask for the mesh supplier’s recommended operating envelope with temperature, exposure duration, liquid composition and mechanical conditions identified. Do not derive a safe use temperature by subtracting an arbitrary margin from a resin melting point. A higher resin melting point alone does not approve a cleaning cycle or a finished component.
Keep geometry constant during a material comparison
Two samples labeled 75 micron can differ in thread diameter, open area, thickness or weave. A measured change in flow or handling therefore may not be caused by the polymer type alone. Record the complete fabric specification when comparing PA6 and PA66 candidates.
The same applies to a 250 micron request: agree whether the number is a nominal opening or a controlled measured characteristic and identify the applicable tolerance. Use the open-area guide for geometry, and do not substitute mesh count alone for the required opening.
Qualify the conditions the mesh will actually experience
Send the process liquid and cleaning exposure as separate inputs, including composition, concentration, temperature and duration. Ask the supplier what evidence supports the proposed finished mesh under those conditions. If dimensions or mechanical properties are reported, identify the measurement and conditioning state rather than assuming dry and in-service results are equivalent.
For a cut component, evaluate the accepted fabric after fabrication and installation in its holder. Confirm fit, active filtration area, edge condition and the agreed downstream result. The cut-part edge guide covers fabrication details; changing the polymer does not remove the need to qualify the finished part.
Make substitutions visible in the quotation
- State PA6, PA66 or “polymer type to be confirmed” explicitly.
- Identify the current fabric or approved sample and required geometry.
- Separate mandatory material requirements from preferences.
- Require any proposed alternative to be listed as a deviation.
- Agree documentation, sample approval and change-notification requirements before production.
If you are uncertain which nylon is in an existing screen, do not identify it by color or feel. Ask for the original specification or an agreed material-identification assessment. For custom fabricated mesh and mesh discs, keep the accepted polymer and fabric reference linked to the component drawing.
Request a polymer-specific nylon mesh quote
Send the required PA type if known, opening, thread or fabric reference, finished dimensions, liquid and cleaning conditions, quantity and current sample information. Ask INCE to confirm the offered polymer, available construction and qualification limits in writing.
Frequently asked questions
Are PA6 and PA66 simply two names for the same nylon?
No. PA6 and PA66 are distinct polyamide types. PA66 may also be written PA6.6, so confirm the exact designation used in the specification.
Can a resin melting point be used as the mesh service temperature?
No. Obtain the recommended conditions and supporting evidence for the actual finished mesh and assembly.
Does a 75 or 250 micron opening identify the nylon type?
No. Opening size and polymer identity are separate specification fields. Record both together with the construction and tolerance.
Material references
BASF Ultramid B PA6; BASF Ultramid A PA66; Sefar’s identified PA6.6 mesh example. The references do not establish INCE resin sourcing, medical suitability or regulatory certification.
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