PA6/66
Polyamide 6/66 Copolymer (Nylon 6/66)
7 products from 6 makers. Bambu Lab does not list this material for the H2C; its published process temperatures are within the printer's limits.
- Tensile modulus (XY)
- 2.34GPa
- 2 products · 1.98–2.7
- Tensile strength (XY)
- 61MPa
- 3 products · 55–78
- Tensile strength (Z)
- 45.8MPa
- one product
- Notched Charpy impact
- 6.9kJ/m²
- one product
- HDT at 0.45 MPa
- 119°C
- 3 products · 111–140
- Price
- 40CAD/kg
- 3 products · 39–91
PA6/66 is a polyamide 6/66 copolymer, a nylon. Makers sell it for gears and for engineering and industrial parts. It is semicrystalline, so it carries light load well above its glass transition: its HDT at 0.45 MPa is 119 °C. On the H2C it prints at 250–270 °C, and every product calls for drying.
Partly documented Tensile strength (Z) and notched Charpy impact rest on 1 product each, tensile modulus (XY) on 2 products and tensile strength (XY), HDT at 0.45 MPa and price on 3 products each. Each figure is the median of the products that publish it comparably, and beside it the middle half of them; a value on a test bar no document describes as printed, or with no stated test load, is set apart, except a heat deflection of a plastic that cannot crystallise, which its glass transition sets, unless its document points to a moulded or resin bar.
On the H2C
Printing in full- Nozzle
- 250–270 °C
- most products that give one
- Bed
- 40–50 °C
- 3 of 7 that give one
- Heated chamber
- 40–60 °C
- one product
- Drying
- 70–110 °C, 4–12 h
- all 7 products call for it
- Nozzle type
- hardened for most
- one of 7 products' sheets asks for one; 1 says a standard nozzle is enough; the rest are silent
No product's setting is beyond the H2C's limits: nozzle 350 °C, bed 120 °C, heated chamber 65 °C.
Among the materials
Against ASA, PA6/66 is 58 % stronger flat and 12 % stiffer, and its HDT at 0.45 MPa is 24 °C higher. Against PC, PA6/66 is 22 % less expensive and 9 % stiffer, and its HDT at 0.45 MPa is 4 °C lower. Among the materials, PA6/66 has a high tensile strength (Z) and a low density and price: each is in the top or bottom quarter of the materials that publish it. The rest of its key properties sit in the middle half.
Against its alternatives, PA6/66 has the lowest notched Charpy impact
How does it compare with what an engineer would buy instead?
- PA6/66: its products' median and middle half
- an alternative
- lowest to highest
- each material's median (top row)
- beyond the scale
Each row is a material, each column a property: the bar is the middle half of a material's products, the tick their median, the hairline their lowest to highest; the ticks above the rows are every material's median.
The figure as a table
| Material | Modulus (XY) (GPa) | Strength (XY) (MPa) | Strength (Z) (MPa) | Notched Charpy (kJ/m²) | HDT 0.45 MPa (°C) | Price (CAD/kg) |
|---|---|---|---|---|---|---|
| PA6/66 (this material) | 2.34 · 2 | 61 · 3 | 45.8 · 1 | 6.9 · 1 | 119 · 3 | 40 · 3 |
| ASA | 2.1 (2–2.32) · 13 | 38.6 (35.9–41.5) · 15 | 25.8 (21.5–28.9) · 7 | 12 (10.5–12.9) · 5 | 96 (92–100) · 12 | 39 (39–57) · 5 |
| PC | 2.15 (2.02–2.41) · 12 | 60 (54.2–65.3) · 15 | 46 (35.9–52.3) · 6 | 9.75 (6.65–14.3) · 4 | 123 (113–139) · 15 | 51 (45–67) · 5 |
| PVDF | 2.45 · 1 | 51 · 1 | — | — | 158 · 1 | 356 · 1 |
| PC-ABS | 1.84 (1.58–1.94) · 4 | 41.8 (39.9–43.5) · 6 | 26.4 · 2 | 40 · 3 | 112 (111–120) · 7 | 64 · 3 |
| PC FR | 2.15 · 2 | 63.5 · 2 | 33.5 · 2 | 10.1 · 2 | 112 · 2 | 70 · 1 |
Each cell is the median of the products ranked, its middle half in brackets, and how many.
Where PA6/66 sits among the 128 rigid materials on file
Where is it in the landscape: stiffness against strength, heat resistance against price?
- PA6/66: median, middle half as a cross
- a PA6/66 product
- an alternative
- another material
- beyond the scale
Tensile strength (XY) against tensile modulus (XY)
MPa, log scale
Tensile modulus (XY), GPa, log scale
HDT at 0.45 MPa against price
°C
Price, CAD/kg, log scale
Grey points are every other rigid material's medians; the alternatives are named.
The figure as a table
| Material | Tensile modulus (XY) | Tensile strength (XY) | Price | HDT at 0.45 MPa |
|---|---|---|---|---|
| PA6/66 (this material) | 2.34 GPa · 2 | 61 MPa · 3 | 40 CAD/kg · 3 | 119 °C · 3 |
| ASA | 2.1 GPa · 13 | 38.6 MPa · 15 | 39 CAD/kg · 5 | 96 °C · 12 |
| PC | 2.15 GPa · 12 | 60 MPa · 15 | 51 CAD/kg · 5 | 123 °C · 15 |
| PVDF | 2.45 GPa · 1 | 51 MPa · 1 | 356 CAD/kg · 1 | 158 °C · 1 |
| PC-ABS | 1.84 GPa · 4 | 41.8 MPa · 6 | 64 CAD/kg · 3 | 112 °C · 7 |
| PC FR | 2.15 GPa · 2 | 63.5 MPa · 2 | 70 CAD/kg · 1 | 112 °C · 2 |
Mechanical properties
Printed flat (XY), PA6/66 typically reaches a tensile strength of 61 MPa at a modulus of 2.34 GPa, and breaks at 15 % elongation. In bending, its flexural strength is typically 91 MPa at a flexural modulus of 2.31 GPa.
| Product | Tensile strength (XY) | Tensile modulus (XY) | Tensile strength (Z) | Elongation at break (XY) | Notched Charpy impact | Notched Izod impact |
|---|---|---|---|---|---|---|
| 3DXTECH AMIDEX PA6 | 55 MPa | 1.98 GPa | not published | 100 % | not published | not published |
| Polymaker PolyMide CoPA | 78 MPa | 2.7 GPa | 45.8 MPa | 13 % | 6.9 kJ/m² | not published |
| BigRep PA6/66 | 66 MPanot described as printed | 2.2 GPanot described as printed | not published | not published | 31 kJ/m²not described as printed | not published |
| SUNLU Easy PA | 61 MPa | 1.79 GPanot described as printed | not published | 15 % | not published | 11 kJ/m² |
| MatterHackers PRO Series | 36.3 MPanot described as printed | not published | not published | 34 %not described as printed | not published | not published |
Across the layers (Z), PA6/66 keeps 59 % of its flat strength and 82 % of its flat stiffness
What does a printed part lose across the layers (Z) against flat (XY), and is that usual?
- a product
- equal share: 100, 75, 50 and 25 %
- PA6/66's median share
- an alternative
Tensile strength
Z keeps 59 % of XY, median of 1 product
flat (XY), MPa
Share kept: PC 75 % · PA6/66 59 % · ASA 59 % · PC-ABS 57 % · PC FR 52 %
Tensile modulus
Z keeps 82 % of XY, median of 1 product
flat (XY), GPa
Share kept: PC FR 95 % · PC-ABS 91 % · PC 88 % · ASA 88 % · PA6/66 82 %
Elongation at break
Z keeps 10 % of XY, median of 1 product
flat (XY), %
Share kept: PC FR 63 % · PC 59 % · ASA 50 % · PC-ABS 36 % · PA6/66 10 %
Each point is a product that publishes both from one sheet: below the 100 % ray it keeps less across the layers than flat. Under each plot, the median share its alternatives' products keep.
The figure as a table
| Product | Property | Flat (XY) | Across (Z) | Z as a share of XY |
|---|---|---|---|---|
| Polymaker PolyMide CoPA | Tensile strength | 78 MPa | 45.8 MPa | 59 % |
| Polymaker PolyMide CoPA | Tensile modulus | 2.7 GPa | 2.21 GPa | 82 % |
| Polymaker PolyMide CoPA | Elongation at break | 13 % | 1.3 % | 10 % |
| ASA (alternative) | Tensile strength | 59 % · 5 | ||
| PC (alternative) | Tensile strength | 75 % · 5 | ||
| PC-ABS (alternative) | Tensile strength | 57 % · 1 | ||
| PC FR (alternative) | Tensile strength | 52 % · 2 | ||
| ASA (alternative) | Tensile modulus | 88 % · 5 | ||
| PC (alternative) | Tensile modulus | 88 % · 3 | ||
| PC-ABS (alternative) | Tensile modulus | 91 % · 1 | ||
| PC FR (alternative) | Tensile modulus | 95 % · 2 | ||
| ASA (alternative) | Elongation at break | 50 % · 5 | ||
| PC (alternative) | Elongation at break | 59 % · 4 | ||
| PC-ABS (alternative) | Elongation at break | 36 % · 1 | ||
| PC FR (alternative) | Elongation at break | 63 % · 2 |
Flat and across the layers, property by property
Flat and across the layers
| Property | Printed flat (XY) | Across the layers (Z) | Z as a share of XY | ||
|---|---|---|---|---|---|
| Median | Products | Median | Products | ||
| Tensile strength MPa | 61 | 3 | 45.8 | 1 | 59 %1 product |
| Tensile modulus GPa | 2.34 | 2 | 2.21 | 1 | 82 %1 product |
| Elongation at break % | 15 | 3 | 1.3 | 1 | 10 %1 product |
| Flexural strength MPa | 91 | 3 | — | — | |
| Flexural modulus GPa | 2.31 | 3 | — | — | |
The middle half of the products under each median. The share is each product's Z value as a part of its XY value, from one sheet and one state, and the median of those shares. How XY and Z differ.
Thermal properties
Its products put HDT at 111–140 °C under 0.45 MPa and 70 °C under 1.8 MPa, with its glass transition typically at 67 °C. Semicrystalline, it carries light load well above its glass transition. As published, Vicat softening is typically 158 °C and melting typically 190 °C.
Where PA6/66's products soften under load
Where do its products soften under load?
- a product
- middle half and median
One mark per product on each property's scale (zoomed where its products sit close together, as its label says); the band is the middle half of the products the median counts, and the line the median.
Hover or select a product to find it in every figure; its name opens its card on the Products page.
The figure as a table
| Property | In the median | Median | Middle half | Lowest in the median | Highest in the median | As published | Added filler or additive |
|---|---|---|---|---|---|---|---|
| Glass transition (Tg) (°C) | 4 | 67 | 66–69 | SUNLU Easy PA, 65 | 3DXTECH AMIDEX PA6 Copolymer v1 0, 76 | 0 | 0 |
Every PA6/66 product that publishes these values is drawn; each value, with its document and conditions, is on the Products page.
| Product | HDT at 0.45 MPa | HDT at 1.8 MPa |
|---|---|---|
| 3DXTECH AMIDEX PA6 | 140 °C | not published |
| Polymaker PolyMide CoPA | 111 °Cafter annealing | 70 °Cafter annealing |
| BigRep PA6/66 | 110 °Cnot described as printed | 69 °Cnot described as printed |
| SUNLU Easy PA | 119 °C | not published |
| MatterHackers PRO Series | 102 °Cnot described as printed | not published |
Printing on the H2C
PA6/66 prints within the H2C's limits and softens near 119 °C, above its 65 °C chamber
What does printing it on the H2C take, and how hot can a part get?
- share of the products that accept each temperature
- what most products accept
- the H2C's limit, and beyond it
- a product
- PA6/66: its products' median and middle half
- as published, under each sheet's own test
Printing it on the H2C
In service
°C
One temperature axis for the settings a print needs and the temperatures a part meets. A setting's shade is how many of the products whose sheets give a window accept each degree; the H2C's limit closes its row.
The figure as a table
| Setting or property | Most products, or the median | Products | H2C limit |
|---|---|---|---|
| Nozzle | 250–270 °C | 7 | 350 °C |
| Bed | 25–50 °C; 30–50 °C; 40–60 °C; 60–70 °C; 65 °C; 70–90 °C; 70–90 °C | 7 | 120 °C |
| Heated chamber | 40–60 °C | 1 | 65 °C |
| Drying | 70–110 °C, 4–12 h | 7 | — |
| Glass transition (Tg) | 67 °C (66–69 °C) | 4 | — |
| HDT at 1.8 MPa | 70 °C | 1 | — |
| HDT at 0.45 MPa | 119 °C | 3 | — |
| Vicat softening temperature | 135–180 °C | 2 | — |
| Melting temperature | 190–198 °C | 3 | — |
Windows read from the Bambu Lab Filament Guide are not shaded: the guide speaks for every product that reads it.
| Setting | Most PA6/66 products |
|---|---|
| Nozzle | 250–270 °C most products that give one |
| Bed | 40–50 °C 3 of 7 that give one |
| Heated chamber | 40–60 °C one product |
| Drying | 70–110 °C, 4–12 h all 7 products call for it |
| Nozzle type | hardened for most one of 7 products' sheets asks for one; 1 says a standard nozzle is enough; the rest are silent |
Where a product's own sheet is silent, its setting comes from a sheet it shares or from the Bambu Lab Filament Guide; each product's card says which.
Hardened nozzle. One product needs one: Polymaker PolyMide CoPA.
After printing
One product publishes values measured after annealing, at 80 °C for 30 min.
PolyMide™ CoPA can be annealed right after the printing process at 70˚C for 2 hours to enhance its thermal and mechanical properties.
Polymaker PolyMide CoPA, data sheet, p. 5After the printing process, it is recommended to anneal the model in the oven at 80°C for 6 hours.
Polymaker PolyMide CoPA, data sheet, p. 5
What makers say about printing it
Moisture sensitivity
Drying (70℃/> 12 h) before printing to achieve the best printing effect, it is recommended to use with eBOX when printing.
eSUN PA Nylon Filament (1kg) Natural, data sheet, p. 2
Printing advice
To ensure a good heat resistance of your printed part it is recommended to anneal your PolyMide™ CoPA 3d printed model.
Polymaker PolyMide CoPA, data sheet, p. 2
More from makers: nozzle wear, warping and shrinkage, supports and removal and odour and emissions
Nozzle wear
When used extensively, PolyMide™ CoPA can be abrasive to brass nozzles.
Polymaker PolyMide CoPA, data sheet, p. 4
Warping and shrinkage
Low shrinkage, not easy to warp and crack when printing.
eSUN PA Nylon Filament (1kg) Natural, data sheet, p. 1
Supports and removal
Otherwise the support structure can be permanently bonded to the model.
Polymaker PolyMide CoPA, data sheet, p. 5
Odour and emissions
It is recommended to place the printer in a well ventilated area.
Polymaker PolyMide CoPA, data sheet, p. 4
Products
7 products from 6 makers; the most from eSUN (2).
- Most documented: Polymaker PolyMide CoPA, with values for more properties than any other.
- Highest tensile strength (XY): Polymaker PolyMide CoPA, 78 MPa.
- Highest HDT at 0.45 MPa: 3DXTECH AMIDEX PA6 Copolymer v1 0, 140 °C.
- Lowest price: eSUN ePA, 39 CAD/kg.
These are published values, not recommendations: the selector judges each product against your requirements.
Uses, limitations and chemicals
What it is sold for
Self-lubricating wear resistance makes it suitable for printing gears
eSUN PA Nylon Filament (1kg) Natural, data sheet, p. 1Structural parts, decorative items, toys, accessories, and figurines
SUNLU Easy PA, data sheet, p. 1Ideal for Engineering and Industrial Parts Choose PolyMide™ CoPA when your project demands high strength, toughness, and heat resistance - perfect for automotive, mechanical, and industrial applications.
Polymaker PolyMide CoPA, maker's product page or guide, p. 1
What makers warn about
Moisture conditioning refers to allowing the print to absorb moisture. This is inevitble since nylons are hygroscopic, but you can expedite the process by keeping the print in a high humidity climate, or submerging them in water, for 48 hours. All of our test specimens were annealed at 100˚C for 16 hours, and then immerged in water at 60˚C for 48 hours. The average moisture content of specimens is 2.57%.
Polymaker PolyMide CoPA, maker's product page or guide, p. 1
Chemicals and environment
| Exposure | What makers say |
|---|---|
| Acid resistance | Not resistant, in all 4 statements |
| Alkali resistance | Mixed, 4 statements disagree |
| Organic solvent resistance | Not resistant, in its one statement |
| Oil and grease resistance | Resistant, in both statements |
Makers rarely give the concentration, temperature or duration: treat them as indications, not design data. Each product's statements are on its card.
Density and price
PA6/66's density is typically 1,120 kg/m³, the middle half 1,120 kg/m³, across 7 products. PA6/66 typically costs 40 CAD/kg, across the 3 products with a regular price in the sample; the lowest is eSUN ePA at 39 CAD/kg.
| Product | Price |
|---|---|
| Polymaker PolyMide CoPA | 91 CAD/kg |
| eSUN PA Nylon | 40 CAD/kg |
| eSUN ePA | 39 CAD/kg |
Regular prices, never sale prices, from 9 Canadian shops and 10 foreign shops, sampled 10 Sep–20 Oct 2026, not live; shipping and tax are not included.
Other properties, as published
7 more properties are published, each under its own sheet's test conditions, so they are listed, not ranked.
The 7 properties, lowest to highest
| Property | Products | Lowest–highest |
|---|---|---|
| Melt mass-flow rate | 2 | 12–19 g/10 min |
| Crystallization temperature | 1 | 128 °C |
| Decomposition temperature | 1 | 300 °C |
| Impact strength, test unclear | 1 | 9.6–17.2 kJ/m² |
| Mould shrinkage | 1 | 1.3–1.6 % |
| Relative permittivity | 1 | 3.4 |
| Water absorption | 1 | 2.82 % |
Sources
15 documents from 7 publishers (11 data sheets, 3 makers' product pages and guides and 1 printer document), read 10 Sep–3 Oct 2026. Each value on PA6/66's Products page names its document and page, and links to the original.
Bambu Lab, H2C Filamant Printing Guide (the H2C's printer guide): print settings for 7 products.
Every document (15), by publisher
| Publisher | Documents | Values | Products |
|---|---|---|---|
| Polymaker | 5 | 73 | 1 |
| SUNLU | 2 | 29 | 1 |
| eSUN | 2 | 11 | 2 |
| 3DXTECH | 2 | 8 | 1 |
| MatterHackers | 2 | 4 | 1 |
| BigRep | 1 | 10 | 1 |
- 3DXTECH, AmideX Nylon 6-66
- 3DXTECH, Technical Data Sheet: AmideX™ PA6 Copolymer 3D Printing Filament
- Bambu Lab, H2C Filamant Printing Guide | Bambu Lab Wiki
- BigRep, FILAMENT PA6/66
- eSUN, ePA Technical Data Sheet
- eSUN, PA Technical Data Sheet
- MatterHackers, Black PRO Series Nylon Filament - 1.75mm (0.75kg) | MatterHackers
- MatterHackers, TECHNICAL DATA SHEET - PRO Series Nylon
- Polymaker, Nov. 2018 Technical Data Sheet Version 4.0 PolyMide™ CoPA
- Polymaker, Polymaker PolyMide CoPA official maker product page
- Polymaker, PolyMide CoPA
- Polymaker, PolyMide™ CoPA
- Polymaker, PolyMide™ CoPA Technical Data Sheet
- SUNLU, Product Information Easy PA
- SUNLU, TECHNICAL DATA SHEET ISO Easy PA