3D Printing Info

Filament comparison

PA blend vs POM

Compare printing settings, strength, heat resistance, dated prices and sources.

PA6/66 copolymer blends guidePOM (acetal) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PA blend comparisonsMore POM comparisons
PA blend vs POM — documented properties and sources
PropertyPA6/66 copolymer blendsPAPOM (acetal)ENGINEERING
Market snapshot
Listing priceUSD/kg; dated snapshots$65.62/kg median; $62.00–$113.33/kg across 4 dated product listingsNot documented
Identity & Market
Base polymer / chemistryPA6/66 copolymer — a nylon alloy that lowers the melting point and improves printability against straight PA6[1][2]Polyoxymethylene, normally the copolymer POM-C. Apium's filament grade is POM-C with antistatic additives; no unfilled POM filament was found on sale[3][4]
Densityg/cm³1.12 (ISO 1183, Polymaker CoPA)[1]1.41 (extruded POM-C stock)[3]
Typical priceUSD/kg1 kg-equivalent spools cluster near 65[5][6][7]Not documented
Price range across brandsUSD/kg62–113 across brands; add:north Adura 62, PrimaCreator NylonPower PA6/66 65 at 500 g, Polymaker CoPA 67, 3DXTech AmideX Nylon 6-66 113[5][8][6][7]Not documented
Market availability1–5Available from several mainstream brands[5][8]Special order, 1-2 makers worldwide — Apium sells a POM-C ESD filament through its own shop and states its printers are the only ones able to process POM-C; no POM filament appears in the 3DJAKE or igo3d product sitemaps, at MatterHackers or at Printed Solid[4][9][10][11]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[5][8][6][7]Not documented
Typical applicationsGeneral-purpose nylon parts and, unusually, CoPA can support itself if the support is removed before it absorbs moisture[1]Gears, bushings, bearings, conveyor and food-machinery parts; Apium markets its POM-C ESD grade for semiconductor insulators, aerospace fasteners and sliding parts[3][4]
Printing Parameters
Nozzle temperature°C250–270 (Polymaker CoPA)[1]Not documented
Bed temperature°C25–50 (Polymaker CoPA)[1]Not documented
Enclosure / chamber requirement1–5Enclosure required (passive) — Polymaker specifies a chamber at ambient temperature[1]Not documented
Maximum volumetric flow (mm³/s; see test conditions)mm³/s16 at Polymaker's 200 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[1][12]Not documented
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning; must be kept below 20 % RH throughout[1][13]Not documented
Extruder requirementNot documentedApium states that the adaptive heating system on its industrial machines is what makes POM-C printable, and that no other 3D printer can process it[4]
Hardware Wear & Reliability
Nozzle hardness required1–4Brass fine indefinitely for unfilled grades[14]Not documented
Abrasiveness1–5Non-abrasive when unfilled[14]Not documented
Nozzle clog risk1–5Very high — frequent jams without careful setup[15][13]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Very high (>2 %) — Polymaker's own wet-state specimens reached 6.16 % moisture content after 48 h immersion at 60 °C[1][13]Low (0.1-0.3 %) — extruded POM-C stock takes up 0.18 % in 24 h and 0.80 % at saturation (ASTM D570)[3]
Drying temperature & time100 °C for 8 h (Polymaker CoPA)[1]Not documented
Symptoms when wetPopping and cracking during extrusion, then hard-to-diagnose defects[15]Not documented
Effect of moisture on strengthMeasured dry against wet on printed specimens at 6.16 % moisture (Polymaker CoPA): tensile 78.0 → 34.3 MPa, Young's modulus 2703 → 724 MPa, flexural strength 109.8 → 22.6 MPa, while notched Charpy rises 6.9 → 27.7 kJ/m² and elongation 12.7 → 13.2 %[1][15]Not documented
Storage requirementPolymaker states CoPA must always be stored and used below 20 % relative humidity[1]Not documented
Hydrolysis at melt temperaturePolymaker requires a 100 °C dry for 8 h and storage below 20 % RH; no molecular-weight loss figure is published, and the published wet data is conditioning rather than melt hydrolysis[1][16]Not documented
Mechanical Properties
Tensile strength (XY)MPa78.0 ± 0.7 printed XY dry and 34.3 ± 2.5 wet, ISO 527 (Polymaker CoPA)[1]66.9 at break and 64.1 at yield (extruded POM-C stock, ASTM D638; converted from 9700 and 9300 psi)[3]
Young's modulusMPa2703 ± 259 printed XY dry and 724 ± 61 wet, ISO 527 (Polymaker CoPA)[1]2275 (extruded POM-C stock, ASTM D638; converted from 330,000 psi)[3]
Elongation at break%12.7 ± 2.1 printed XY dry and 13.2 ± 2.3 wet, ISO 527 (Polymaker CoPA)[1]40 at break and 9 at yield (extruded POM-C stock, ASTM D638)[3]
Flexural strengthMPa109.8 ± 1.3 printed XY dry and 22.6 ± 0.5 wet, ISO 178 (Polymaker CoPA)[1]89.6 (extruded POM-C stock, ASTM D790; converted from 13,000 psi)[3]
Flexural modulusMPa2510 ± 25 printed XY dry and 636 ± 11 wet, ISO 178 (Polymaker CoPA)[1]2758 (extruded POM-C stock, ASTM D790; converted from 400,000 psi)[3]
Charpy impact, notchedkJ/m²6.9 ± 1.4 printed XY dry and 27.7 ± 1.2 wet, ISO 179 notched (Polymaker CoPA) — impact quadruples when conditioned[1]Not documented
Other impact dataNot documentedIzod 53 J/m on extruded POM-C stock, converted from 1.0 ft-lb/in[3]
Layer adhesion / Z tensileMPa45.8 ± 1.5 printed Z dry, falling to 13.7 ± 1.2 wet, ISO 527 (Polymaker CoPA)[1]Not documented
Brittleness1–5Tough — absorbs impact, yields before breaking[1]Tough — absorbs impact, yields before breaking; extruded stock elongates 40 % before failing. No printed figure is published[3]
Hardness (scale-specific)Shore A / Shore D / RockwellShore D 86 and Rockwell 85 (108) — the source does not name the scales on extruded unfilled PA66 stock (ASTM D2240, D785)[17]Rockwell 86 (and R120) — the source names only the R scale on extruded POM-C stock (ASTM D785)[3]
Fatigue / repeated-flex resistance1–5Excellent — living hinges viable[14]Not documented
Elasticity / flexibility1–5Semi-flexible[15]Not documented
Z strength as % of XY%59 dry (45.8 Z against 78.0 XY) and 40 wet, printed[1]Not documented
Wear resistance & frictionNot documentedWear factor 65e-10 in3*min/(ft*lb*h) and a dynamic coefficient of friction of 0.21 at 40 psi and 50 fpm (ASTM D3702, extruded stock) — the properties that make acetal the default gear and bushing plastic; Apium lists good sliding properties as the reason for its grade[3][4]
Thermal Properties
HDT at 0.45 MPa°C111 (ISO 75, 0.45 MPa, Polymaker CoPA)[1]158 (extruded POM-C stock, ASTM D648 at 66 psi; converted from 316 °F)[3]
HDT at 1.8 MPa°C70 (ISO 75, 1.8 MPa, Polymaker CoPA)[1]110 (extruded POM-C stock, ASTM D648 at 264 psi; converted from 230 °F)[3]
Glass transition (Tg)°C66 (DSC, Polymaker CoPA)[1]Not documented
Melting point / Vicat°C189 melting (DSC); Vicat 180, crystallisation 148, decomposition 370 (Polymaker CoPA)[1]165 melting (extruded POM-C stock; converted from 329 °F)[3]
Continuous service temperature°CNot documented91 long term and 141 intermittent (extruded POM-C stock; converted from 195 °F and 285 °F)[3]
Annealing response80 °C for 6 h (Polymaker CoPA)[1]Not documented
Thermal expansion (CTE)µm/m·K81.0 on extruded unfilled PA66 stock (ASTM D696; source states 4.5e-5 in/in/°F) — the same chemistry as a PA6/66 copolymer[17]84.6 (extruded POM-C stock, ASTM D696; source states 4.7e-5 in/in/°F)[3]
Flammability / UL 94Not documentedUL 94 HB on extruded POM-C stock[3]
Environment & Chemical
Chemical resistanceNot documentedGood chemical resistance, particularly to bases; Apium lists resistance to bases as a headline property[3][4]
Water / humidity resistance in service1–5Absorbs water, properties shift — 6.16 % uptake cost 56 % of tensile strength and 73 % of modulus[1]Good — minor absorption; 0.80 % water at saturation (ASTM D570, extruded stock)[3]
Electrical & ESD propertiesNot documentedVolume resistance 1e14 ohm-cm, dielectric strength 500 V/mil and dielectric constant 3.7 at 60 Hz on extruded stock (ASTM D257, D149, D150); Apium's filament grade adds antistatic agents[3][4]
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[18]Not documented
VOC emission rateµg/minUp to 180 caprolactam, the dominant VOC from nylon; total VOC reached nearly 200 µg/min, the highest of the nine filaments tested[18]Not documented
Ultrafine-particle emission rateparticles/min≈2 × 10⁸ median — low for ultrafine particles despite the highest VOC mass of any filament tested[18]Not documented
Hazardous species emittedCaprolactam, at up to 180 µg/min from nylon filament — the largest single-VOC emission rate measured in the study[18]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[18]Not documented
Post-Processing
Sanding & machiningNot documentedEasy to machine — Ensinger lists machinability as a headline property of POM-C stock[3]
Support material pairingCoPA can support itself, but Polymaker warns the support bonds permanently if it absorbs moisture before removal[1]Not documented
Solvents & Solubility
Soluble inDissolved at 23 °C by formic acid above ~50 %, phenol, m-cresol, 96 % sulphuric acid or hexafluoroisopropanol — laboratory reagents.[19]Hexafluoroisopropanol dissolves it at room temperature; NMP and DMF only when hot. Laboratory reagents.[20]
Softened or crazed byZinc chloride solutions stress-crack it — 10 % marginal, 37 % not resistant; alcoholic calcium chloride dissolves it.[19]Acids, oxidants, halogens and hot concentrated zinc chloride attack it; alcohols, ketones and esters do not.[20][21]
Solvent welding & smoothing agentNone — nylon's only solvents are formic acid, phenol and HFIP, all of which degrade the part they wet.[19]None — no solvent softens POM below its melting point, which is why it is bolted or heat-welded rather than glued.[20]

Material entries describe families or representative grades, not an interchangeable specification for every spool. Test methods, orientations and conditions may differ. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.

Sources for this comparison

  1. PolyMide CoPA Technical Data Sheet V5.4 (dry and wet status blocks) Polymaker · 2024-11 · tds
  2. AmideX Nylon 6-66 — product page 3DXTech · 2026-08 · vendor
  3. TECAFORM AH natural (POM-C) — stock shape properties Ensinger · 2026-08 · tds
  4. POM-C ESD 3D printing — material page Apium 3D Technologies · 2026-08 · doc
  5. Polymaker product catalogue Polymaker · 2026-08 · vendor
  6. add:north Adura product page add:north · 2026-08 · vendor
  7. PrimaCreator SELECT NylonPower PA6/66 product page PrimaCreator · 2026-08 · vendor
  8. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  9. 3DJAKE product catalogue 3DJAKE · 2026-08 · vendor
  10. igo3d product sitemap (17452 product URLs) igo3d · 2026-08 · vendor
  11. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  12. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  13. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  14. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  15. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  16. PolyMide CoPA — Technical Data Sheet page Polymaker Wiki · 2026-08 · tds
  17. TECAMID 66 natural (PA66) — stock shape properties Ensinger · 2026-08 · tds
  18. Emissions of Ultrafine Particles and Volatile Organic Compounds from Commercially Available Desktop Three-Dimensional Printers with Multiple Filaments (Azimi et al.) Environmental Science & Technology 50(3) 1260-1268 · 2016-01 · paper
  19. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds
  20. Resistance of Ultramid, Ultraform and Ultradur to chemicals (TI-KTU/AS-28 e) BASF · 2000-10 · tds
  21. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds