Material

HP 3D High Reusability PA 12

Technical Documents

🖹 HP MJF PA 12 Data sheet

🖹 Nylon 12 – MJF – Safety Data Sheet (SDS)

🖹 Nylon 12 – MJF – PAHs Certificate

🖹 Nylon 12 – MJF – Biocompatibility Certificate

🖹 Nylon 12 – MJF – UL 94 and UL 746A Certification Technical Note

🖹 Nylon 12 – MJF – Summary of Regulatory Compliance and Environmental Attributes

🖹 Nylon 12 – MJF – Statement of Composition for Toy Applications Certificate

Material Properties

Tensile modulus (ASTM D638)

1800 MPa (XY), 1800 MPa (Z)

Tensile strength (ASTM D638)

48 MPa

Elongation at break (ASTM D638)

20 % (XY), 15 % (Z)

Flexural modulus (23°C)(ASTM D790)

1730 MPa

Description

Material Highlights

high strength & durability, good impact resistance, professional finish, thin features & interlocking parts

Flammability degree (UL 94)

HB rating (<75mm/min for thickness of 0.75mm)

Electrical conductivity (UL 746A)

Dielectric strength value 2.8kV/mm, Volume Resistivity value 10^14 ohm-cm

Design Guidelines

Recommendations to keep in mind when designing in order to have successful products in Multi Jet Fusion (MJF) Plastic PA12

Material Info

Multi Jet Fusion (MJF) Plastic PA12 is HP’s nylon plastic with excellent mechanical properties and a slightly grainy finish. MJF Plastic PA12 is an ideal choice for a wide range of applications from industrial parts to durable end-use goods.

Its strength, durability and stiffness make it great for functional parts, such RC car parts and mounts. It is also popular for home decor, eyewear and games. MJF Plastic PA12 is printed using HP’s Multi Jet Fusion technology and supports very complex geometries and thin features.

Bounding Box (size)

The bounding box represents the size we are able to print and post-process at once.

Min X + Y + Z ≥ 9mm

In order to be able to print your model, each of its pieces must be greater to those dimensions.

If the bounding box of your model is not bigger than our minimum, try scaling it up or making it thicker or enlarging some of its parts/features or any combination of the above.

Max 284x380x380

In order to be able to print your model, each of its pieces must fit within those dimensions.

If the bounding box of your model is bigger than our maximum, try scaling it down or removing unnecessary features/parts or cutting it to smaller parts or any combination of the above.

Wall thickness (minimum)

It represents the minimum wall thickness required in order to be able to produce your model, ship it and reach you unharmed. A wall could also be defined as the distance between two parts which form a closed and solid mesh.

 

Tip: The thicker the model, the more solid and rigid it gets. We recommend thin wall in case you want your model to be flexible. The geometry of the model plays a crucial role on the solidity. Walls thicker to 2mm start losing their flexibility and become rigid.

Supported (min 0.4mm at print size)

A wall is considered supported if it is connected to two or more walls on at least two of each sides.

If any supported walls are not thicker than the minimum required, try making them thicker, or adding supports or both.

Unsupported (min 0.5mm at print size)

A wall is considered unsupported if it is connected to other walls on one side only.

If any unsupported walls are not thicker than the minimum required, try making them thicker or adding supports or both.

Tip: Be aware that bigger parts with thin wall might droop due to gravity.

 

Wires

Wires are long and thin features of a model. As wire is considered a part whose length is two times greater than its width.

Tip: In general, wires follow the same rules as walls; nevertheless, due to their delicate nature you should be extra cautious when designing them.

Supported (min 0.8mm thick at print size)

A wire is considered supported if it is connected to two or more walls on at least two of each sides.

If any supported wires are not thicker than the minimum required, try making them thicker, or adding supports or both.

Unsupported (min 0.9mm thick at print size)

A wire is considered unsupported if it is connected to other walls on one side only.

If any unsupported wires are not thicker than the minimum required, try making them thicker, or adding supports or both.

Details

As details are considered all those features whose length is less than two times their width. Details could be either embossed or engraved on a surface. 

Engraved

Non-readable

Minimum line thickness ≥ 0.2mm

Minimum depth ≥ 0.2mm

Readable

Minimum line thickness ≥ 0.4mm

Minimum depth ≥ 0.4mm

Embossed

Non-readable

Minimum line thickness ≥ 0.2mm

Minimum depth ≥ 0.2mm

Readable

Minimum line thickness ≥ 0.4mm

Minimum depth ≥ 0.4mm

Make sure your detail’s length and width is greater than the minimum required, or else they won’t be clear and visible (the larger the detail, the more visible and clear it gets).

If any details on your model are not greater than the minimum required try making them bigger or removing them.

Tip: Don’t forget, geometry plays a crucial role on the visibility of your details.

Escape holes

Escape holes are the exit route of the excess powder trapped in a hollow model.

Minimum diameter for models with one escape hole: 4.0mm (at print size)

Minimum diameter for models with at least two escape holes: 2.0mm (at print size)

If the model has complex geometry with many separate hollow cavities, make sure there is an escape route for every cavity. In general multiple escape holes are recommended in order to create airflow for the powder to exit and access to all cavities. If your model does not have sufficient escape holes, we will not be able to clean properly.

If your escape holes are not sufficient and over the minimum requirements, try enlarging them or adding more or filling the hollow space or any combination of the above.

Clearance (0.6mm at print size)

Clearance is the distance between any two parts. If the clearance is not adequate, it is possible that the parts might stick to one another creating problems such as preventing mechanical parts from moving.

If your clearance is not over the minimum required, try making it greater or fuse the parts together if their independence is unnecessary.

Sprues

 
2 mm thick, attached in at least 2 places per part
 

Sprues are wires that keep two or more parts together. Parts should be connected with a minimum of two sprues each. Please consider the size of your sprues and increase them as needed as minimum guidelines will not always be adequate for large models. If the sprues are within the guidelines and are broken, but there is no damage to your model, we will still ship them as is.

Interlocking and enclosed parts

Yes. Polyamide (PA12) can produce interlocking and enclosed parts as long as the clearance is over the minimum.

Multiple parts per model file

Yes. Multiple parts per model file can be processed and produce in Polyamide (Nylon).