Before Printing Unfilled Nylon: Check the Product and the Setup

Start a nylon print with the product name, not a generic temperature chart. A profile for one polyamide does not establish that another spool will work with the same hotend, nozzle, build sheet or drying cycle.

This is a first-print decision guide for nylon products without fiber reinforcement. It uses PolyMide CoPA and Prusament PA11 Natural as named examples, not interchangeable recipes or recommendations to buy them. Carbon-fiber and glass-fiber variants need their own documentation. An unfilled product can still contain additives; do not read “unfilled” as a guarantee of a pure polymer, low nozzle wear or compatibility with every printer.

1. Identify what is on the spool

Record the maker, exact product, diameter, color or variant, and batch or SKU if available. Save the current technical data sheet, the safety data sheet supplied for your product and region, and the product instructions with their version dates. Keep these with the intended printer profile.

For example, Polymaker's CoPA TDS describes a nylon 6/6,6 copolymer. Prusa's PA11 Natural introduction explicitly distinguishes its material from PA11 with carbon fiber. Neither description makes another nylon product equivalent.

If the label is unclear, identify the material with its supplier before treating it as a known formulation. A familiar family name is not enough to select a supported process.

2. Check the entire machine, not just its maximum temperature

Compare the product requirements with the printer and hotend manufacturer's permitted operating conditions. Check the hotend construction, nozzle compatibility, supported profile, build-surface limits and any chamber requirements. A displayed temperature limit alone does not establish suitability for a sustained print.

Do not assume that an unfilled nylon always belongs on brass. The CoPA TDS specifically recommends a wear-resistant nozzle. In contrast, the current Prusament PA11 Natural product page lists a standard brass nozzle for that product. Follow the exact formulation and hardware documentation rather than extending either example to all nylon.

That PA11 page lists supported Prusa profiles for CORE One+, CORE One L and Prusa Pro HT90. This list is not evidence of an equivalent profile for an unenclosed printer or another model. If a required capability or profile is missing, resolve it before printing; do not improvise a hotter chamber or disable a protection to make the setup fit.

3. Resolve conflicting instructions before choosing a drying cycle

CoPA currently illustrates why saving the exact source matters. Its TDS V5.5, in the January 6, 2026 file, gives a drying condition of 100°C for 8 hours. The US shop's Print Settings section gives 80°C for 10 hours; the same page's specification summary says 80°C for 8 hours, while its tips repeat 100°C for 8 hours.

These are conflicting published instructions, not drying options endorsed by this article. Do not average them, choose the hottest value as a precaution, or assume a dryer and spool tolerate it. Ask Polymaker which document and cycle apply to the exact product and batch, and verify that the dryer and spool are rated for the confirmed process. Save the answer with the setup record.

The global CoPA product page adds another published instruction: 80°C for 6 hours, conditional on absorbed moisture. Its documentation link opens TDS V5.5. The US shop instead links TDS V5.4; that document's table also lists drying at 100°C for 8 hours, separately from annealing. The download version and the product-page instructions therefore both need recording.

A newer document number alone does not establish which instruction applies to your spool. These differences remain unresolved here; no manufacturer clarification or drying recipe is supplied.

4. Separate drying, storage and treatment of the printed part

These are different operations:

Drying prepares filament for printing under its maker's instructions and the equipment's limits.
Dry storage limits subsequent moisture uptake. Prusa describes a dry box as slowing moisture absorption after drying; that does not make storage a substitute for a required drying process.
Annealing treats an already printed part. The CoPA TDS lists annealing separately from filament drying. Do not transfer a printed-part treatment to a spool.
Moisture conditioning concerns the state of the printed nylon. If a property is reported for a conditioned or annealed specimen, do not assume the same result for your newly printed part.

This guide supplies no annealing or conditioning procedure. Check the actual product instructions and dimensional consequences before adding either operation. Manufacturer test values also depend on their specimen and test conditions; they are not a verified working-load or service-temperature rating for your design.

5. Match the surface and separate thermal control from ventilation

Use the sheet maker's instructions for the exact filament and coating. The PA11 Natural page points to Prusa's PA Nylon sheet and warns against IPA on that surface. Do not copy the cleaning routine from a PLA print on smooth PEI. Confirm both adhesion and permitted removal before starting; stronger bonding is not automatically a better result.

Enclosure language needs the same care. The CoPA TDS calls for an enclosure at ambient temperature, while the US shop includes both no-enclosure wording and an enclosure recommendation. This guide does not select one as authoritative. Confirm the intended setup with the manufacturer, including the printer's permitted chamber conditions.

Thermal control and emission control are separate checks. A closed box that retains heat is not, by itself, evidence of adequate ventilation. CoPA's SDS, section 7 calls for workplace ventilation/exhaustion. Prusa's PA11 introduction addresses active filtration or a well-ventilated room. Use the applicable safety guidance; this article does not validate a particular enclosure, filter or room arrangement.

6. Make a small, recorded first print

After the document conflicts and equipment checks are resolved, choose a small sample that represents a feature you need: a hole, mating tab or supported overhang, for example. Keep the profile version and preparation record. Observe loading, the first layer, lifting, extrusion consistency and the permitted release process. Measure the relevant feature after the intended post-processing or conditioning, if any.

Change one documented setting at a time and record the result. A successful sample is a useful checkpoint, not proof that a larger part, different orientation or loaded application is qualified. If it fails, return to the recorded observations instead of diagnosing every rough surface or strand as moisture.

Use the drying workflow for general drying decisions and the nozzle reference for hardware compatibility questions. The nylon material directory provides family context; it does not replace the product-specific checks above.

Sources

Sources and download-version links checked October 22, 2026; CoPA TDS tables visually verified. FilamentMap did not print, dry, anneal or mechanically test these products for this article. The CoPA discrepancies above remain unresolved by the manufacturer in the evidence available to this draft.

Material Records

Browse material-family identities, related records, and dated evidence where available.

Browse Filaments →