Materials we manufacture / PA
LCPA HX
Filament guide.
WJ LCPA HX is a low-crystallinity copolyamide filament. The irregular polymer chain gives low printing shrinkage and strong layer bonding while retaining the chemical resistance, fatigue resistance and toughness expected of a nylon. Elongation at break is far higher than that of conventional PA6 or PA66 grades.
WJ-TDS-LCPA-HX-001 · Rev V1.0 · Issued 2026-08-01
- Nozzle temperature
- 270 – 290 °C
- Printing speed
- 120 – 150 mm/s
Technical data sheet
Overview & applications.
WJ LCPA HX is a low-crystallinity copolyamide filament. The irregular polymer chain gives low printing shrinkage and strong layer bonding while retaining the chemical resistance, fatigue resistance and toughness expected of a nylon. Elongation at break is far higher than that of conventional PA6 or PA66 grades.
Typical applications
Clips, snap fits and living hinges – gears, sliders and drive parts – oil- and chemical-resistant jigs and fixtures – pipe fittings and connectors – parts subjected to repeated or cyclic loading.
Product specifications
| Parameter | Unit | Value |
|---|---|---|
| Filament diameter | mm | 1.75 (2.85 on request) |
| Diameter tolerance | mm | ± 0.02 |
| Roundness tolerance | mm | ± 0.02 |
| Net filament weight | kg | 1.00 (0.25 / 0.50 / 3.00 on request) |
| Spool and hub | mm | Ø 200 × 65, hub Ø 55, 4 locating holes |
| Spool material | · | PC + ABS spool, Ø 200 × 65 mm, hub Ø 55 mm, heat resistant to 90 °C |
| Sealing | · | Vacuum barrier bag with desiccant; resealable |
| Colour range | · | Natural / black as standard; RAL, Pantone or physical-sample matching and custom colour development on request |
Technical data sheet
Recommended printing parameters.
Use the grade-specific ranges as a starting point and tune settings for your printer and part geometry.
| Parameter | Unit | Value |
|---|---|---|
| Nozzle temperature | °C | 270 – 290 |
| Cooling fan | · | OFF |
| Build surface material | · | PEI film, PI film |
| Printing speed | mm/s | 120 – 150 |
| Build plate temperature | °C | 80 – 90 |
| Environmental temperature | °C | 40 – 60 |
| Annealing (after printing) | °C / h | 100 °C for 6 h |
This technical data sheet provides typical reference values for material comparison and selection only. It is not an independent third-party test report and does not constitute a product specification, warranty or guarantee of performance. Test methods and specimen conditions are stated in the corresponding sections. The user must verify suitability for the intended application.
These values have not been independently re-tested by WJ on this batch.
Technical data sheet
Material properties.
Typical values from the original TDS. Preserve the test method and specimen orientation when comparing materials.
Physical & thermal properties
| Property | Test method | Unit | Typical value |
|---|---|---|---|
| Density | ISO 1183 | g/cm³ | 1.06 |
| Light transmission | N/A | · | N/A |
| Flame retardancy | N/A | · | N/A |
| Melting temperature | ISO 11357 | · | N/A |
| Heat deflection temperature | ISO 75-2 | · | N/A |
| Vicat softening temperature | ISO 75-2 | · | N/A |
Mechanical properties
| Property | Test method | Unit | Typical value |
|---|---|---|---|
| Tensile strength (X-Y) | ISO 527 | MPa | 38 |
| Tensile strength (Z) | ISO 527 | MPa | 27 |
| Elongation at break (X-Y) | ISO 527 | % | 165 |
| Elongation at break (Z) | ISO 527 | % | 1 |
| Bending strength (X-Y) | ISO 178 | MPa | 61 |
| Bending strength (Z) | ISO 178 | MPa | 59 |
| Bending modulus (X-Y) | ISO 178 | MPa | 1453 |
| Bending modulus (Z) | ISO 178 | MPa | 1382 |
| Charpy impact strength (X-Y) | ISO 179 | KJ/m² | 76 |
| Charpy impact strength (Z) | ISO 179 | KJ/m² | 13 |
Chemical & physical characteristics
| Parameter | Value |
|---|---|
| Composition | Polyamide (PA / PPA), fibre reinforced where applicable |
| Odour when printing | Faint, characteristic odour |
| Skin hazard | No hazard in solid filament form; cut fibre ends irritate skin |
| Chemical stability | Stable under normal storage and handling |
| Moisture uptake | Noticeable – keep sealed and dry before printing |
| Solubility | Insoluble in water; dissolved by formic acid, phenols and strong acids |
| UV and weathering | Poor to fair – protect from prolonged direct sunlight |
| Acid resistance | Poor against strong mineral acids |
| Alkali resistance | Good |
| Organic solvent resistance | Good against hydrocarbons and oils; poor against phenols |
| Flammability | Flammable solid |
| Combustion products | Carbon oxides, nitrogen oxides |
N/A values remain as reported. Material-family compatibility statements require application-specific validation.
Technical data sheet
Data source & test conditions.
| Topic | Data source & test conditions |
|---|---|
| Data status | Typical reference values; not independently re-tested by WJ on this batch. |
| Test standards | ISO 1183 (density) – ISO 11357 (melting temperature) – ISO 75-2 (heat deflection and Vicat) – ISO 527 (tensile) – ISO 178 (flexural) – ISO 179 (Charpy impact). |
| Specimen orientation | X·Y: printed flat on the build plate. Z: printed standing upright so that the load acts across the layer stack. |
| Conditioning | Specimens conditioned to ISO 291, 23 °C / 50 % RH, before testing. |
| Printing conditions | Specimens printed with the parameters in Section 3: 100 % infill, three or more perimeters, 0.4 mm nozzle or larger. |
| Status of this sheet | Indicative. WJ is building its own test programme; values will be replaced with WJ in-house data as it becomes available. Contact us for the current status before design release. |
| Topic | Guidance |
|---|---|
| Typical, not minimum | Typical reference values for standard specimens under the stated conditions; not finished-part performance. |
| Orientation matters | Values marked X·Y apply to specimens printed flat on the build plate. Z values are measured on parts printed standing up and are typically lower than X·Y. Design for the direction that carries the load. |
| Reinforced grades are anisotropic | Fibre-reinforced grades show a larger X·Y to Z difference than unfilled grades. Where the Z value is much lower, orient the part so that the load runs along the layers. |
| Not a certificate | This sheet is not an inspection certificate, a Declaration of Conformity or a certificate of analysis. Batch-specific CoA, RoHS / REACH declarations and safety data sheets are issued separately on request. |
Technical data sheet
Storage, handling & safety.
| Topic | Guidance |
|---|---|
| Storage before use | Sealed bag with desiccant, 15 – 25 °C, below 50 % RH, away from direct sunlight and UV. Shelf life 24 months in the sealed bag. |
| Storage after opening | Engineering grades absorb moisture noticeably. Reseal with desiccant immediately after use and re-dry before critical prints: 70 – 80 °C for 4 – 6 h, or follow the grade-specific schedule in Section 3 where one is give |
| Symptoms of moisture | Popping and hissing at the nozzle, steam bubbles, rough extrusion, weak layer bonding and loss of impact strength. Dry the spool before changing any printing settings. |
| Nozzle wear | Carbon- and glass-fibre reinforced grades are abrasive. Use a hardened steel, carbide or ruby nozzle: a brass nozzle can wear out within a few hundred grams of reinforced filament. |
| Annealing | Where a grade is annealed (Section 3), move the print straight into a cold oven, ramp slowly, hold, then cool inside the oven. Never anneal filament on the spool – most spools deform above 90 °C. |
| Handling | Keep the spool on its holder and avoid sharp bends at the extruder inlet. Cut reinforced filament leaves sharp fibre ends – wear gloves when handling. |
| Ventilation | Printing releases a noticeable odour and measurable VOC, particularly with PA, PPA, ABS and PPS grades. Print under extraction or in a filtered enclosure. Not for use in enclosed occupied spaces. |
| Fire and disposal | Combustible solid. Keep away from open flame and hot surfaces. Spool, bag and carton are recyclable; offcuts are not biodegradable and should go to plastics recycling. |
| Personal protection | No special protection required for normal use. Wear gloves when handling hot parts or cut filament and safety glasses when cutting. Use an organic-vapour respirator for prolonged printing in a confined space. |
Technical data sheet
OEM & ordering.
| Topic | Ordering information |
|---|---|
| Standard spool | 1.00 kg net, Ø 200 mm, hub Ø 55 mm, 4 locating holes. 0.25 / 0.50 / 3.00 kg spools on request. |
| Spool material | PC + ABS spool, Ø 200 × 65 mm, hub Ø 55 mm, heat resistant to 90 °C. Grades intended for annealing are supplied on request on a metal or high-temperature carrier. |
| Standard diameter | 1.75 mm (2.85 mm on request). Tolerance per Section 2. |
| Export carton | 10 rolls per carton, 5-ply corrugated. Carton net 10.0 kg, gross approx. 13.1 kg. Neutral print as standard. |
| Colour range | Natural / black as standard; RAL, Pantone or physical-sample matching and custom colour development on request. |
| OEM services | Spool label, shrink film print, spool material and colour, carton artwork and user manual. Artwork setup and MOQ are quoted per project. |
| Order confirmation | Every order is confirmed by a proforma invoice stating grade, colour, diameter, quantity, unit price, Incoterms and lead time. |
| Shipping and quality documents | Commercial invoice, packing list, bill of lading, certificate of origin and batch certificate of analysis as standard. RoHS / REACH declaration and safety data sheet on request. |
Confirm current commercial terms with WJ for your project.
Data disclosure
Disclaimer & data status.
The data in this document are typical values obtained from tests on standard specimens as described in Section 5. They are provided for material comparison and selection only and do not constitute a specification, warranty or guarantee of performance. Properties of an actual printed part depend on printer hardware, slicing parameters, part geometry, build orientation, ambient conditions and post-processing. Fibre-reinforced grades are strongly anisotropic and must be qualified by the user for the intended load case. WJ reserves the right to amend this document without notice. The buyer is responsible for verifying that the material is suitable for the intended application, including any regulatory, electrical or food-contact requirement.
Typical reference values / no third-party report
This technical data sheet provides typical reference values for material comparison and selection only. It is not an independent third-party test report and does not constitute a product specification, warranty or guarantee of performance. Test methods and specimen conditions are stated in the corresponding sections. The user must verify suitability for the intended application.
These values have not been independently re-tested by WJ on this batch. They must not be interpreted as results of WJ internal testing.
PDF disclosure addendum A1 · 2026-08-01. Numerical properties and processing ranges are unchanged.
Technical data sheet
Original TDS & revision.
| Rev | Date | Description | Approved |
|---|---|---|---|
| V1.0 | 2026-08-01 | First issue of LCPA HX technical data sheet. | QC / WJ |
Document WJ-TDS-LCPA-HX-001. This TDS is not a batch certificate of analysis or conformity.
Manufactured for your brand
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