Seamless order fulfillment with E-Commerce Integrations
Seamless order fulfillment with E-Commerce Integrations

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Material Information
Design Guidelines

TPU

Also known as Thermoplastic Polyurethane

Colors

White Strong & Flexible

About TPU

Thermoplastic Polyurethane, or TPU, is an industry-standard flexible, rubber-like material that is great for elastic end-use products. Printed using Selective Laser Sintering (SLS), a robust process that solidifies material layer-by-layer, TPU parts are durable and can include interlocking features.

Common Applications

Automotive, Medical, Robotics, Hoses, Seals, Footwear, Helmet interiors, Toy tires

Handling and Care

Heatproof to 95C/203F
Skin-Friendly
Rubber-like Flexibility
Good Impact Resistance
Durable

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Frequently Asked Questions

What colors are available for this material?

TPU is available in Natural (off-white).

How long will it take to receive a model in this material?

Production time depends on the model size, but usually products ship within 13 business days.

How is this material made?

This material is made using Selective Laser Sintering (SLS) technology. A bed of Nylon powder is sintered with a laser layer-by-layer, solidifying the powder into TPU.

How can I finish (smooth and dye) the material myself?

It is possible to finish your product yourself for a more customized look. You can smooth, dye and even coat your products at home. Sandpaper with different grit sizes is recommended to smooth your surface. To create an even smoother surface, try combining sandpaper with a primer. To dye your product yourself, see the following tutorial.

More Materials

Professional Smooth Finish

High Strength & Durability

Watertight

Applications
Cases & Mounts
Mechanical Parts
Eyewear
Technology
Multi-Jet Fusion
Good Strength
Many Colors Available
High Density
Applications
Tools & Accessories
Home Decor
Art
Technology
Binder Jetting
  • Bounding Box
  • Wall Thickness
  • Wires
  • Surface Details
  • Escape Holes
  • Clearance
  • Sprues
  • Interlocking Parts
  • Multiple Parts
  • Accuracy
  • Design Tips
  • Pricing

BOUNDING BOX

Maximum
200 × 200 × 200 mm
Minimum
15 x 15 x 15 mm
X + Y + Z ≥ 15.0 mm

Your model should be the minimum and maximum bounding box sizes. The maximum bounding box represents the largest model that that we can manufacture. The minimum bounding box size is the smallest dimension in which we can manufacture in this material.

WALL THICKNESS

Minimum Supported Wall Thickness
0.7 mm
Minimum Unsupported Wall Thickness
0.7 mm

A supported wall is connected on two or more sides. An unsupported wall is one connected to other walls on less than two sides. Walls in your model should be thicker than or equal to the minimum measurements suggested to ensure your model makes it through printing and cleaning. Walls that are too thin are prone to warping in the printing processing, or may break when we remove it from the printer and clean it. Walls and wires close to or slightly above the guidelines may still be rejected based on the geometry. For example, extra long wires or walls protruding from an object may be damaged during cleaning. Our production team will communicate with you if the design is too weak with tips on how to strengthen it.

WIRES

Minimum Supported Wires
1.0 mm
Minimum Unsupported Wires
2.0 mm

A geometry considered a wire when its thinner in both unconnected directions than its length. Wires that are under our suggested minimums are prone to breaking in the cleaning process, or warping.

SURFACE DETAILS

Min embossed detail
1.0 mm high & wide
Min engraved detail
1.5 mm high & wide

We recommend these minimum measurements for details like embossing or engraving, based off of printer resolution.

ESCAPE HOLES

Single Escape Hole Diameter
4.0 mm
Multiple Escape Hole Diameter
3.0 mm

Pressurized air is used to blast excess powder from models that are hollow, or contain hollow cavities. In order for us to safely do this, escape holes need to be larger than 4.0 mm in diameter. For models larger than 50.00 mm³ we require two or more escape holes at least 3.00 mm in diameter.

A single escape hole at the end of a cavity will not allow material in the corners near the escape hole to fully escape. So we recommend multiple escape holes at both ends of the cavity.

CLEARANCE

1.0 mm

Clearance is the space between two parts, e.g. space between gears or a ball and socket joint.

SPRUES

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

Sprues are wires that keep two models together. Sprues are more likely to break compared to other wires because they typically connect parts with high mass on either side. For this reason, they need to be thicker than our minimum wire thickness.

INTERLOCKING AND ENCLOSED PARTS ?

Yes.

TPU is printed with an SLS process that uses a laser to fuse together nylon powder. This enables interlocking parts, as long as the distance between them is greater than the indicated minimum.

MULTIPLE PARTS ?

Up to 250.

ACCURACY

± 0.3- 0.7 mm for every 100 mm

DESIGN TIPS

Print lines or "Stepping"

A "staircase" effect, or print lines, can occur on the surface of your print. These can become more pronounced on curved and angled surfaces.

Preventing Warping

Making your design more stiff (increasing torsional rigidity) will reduce the risk of warping. Longer walls need to be thicker than short ones.

Avoid "Spikes"

If your model has spike-like geometry where the spike is longer than it is wide, it’s possible for it to break in the cleaning process.

Orientation

Our production team does their best to evaluate your product and orient it to optimize either dimensionally accuracy or aesthetics depending on the application. Generally, the top surface will have more visible stepping than the bottom surface. The mating surface and other important features like holes are the most accurate when placed in the horizontal plane.

Holes & Small Holes

We cannot clean holes that are too small compared to their depth. Additionally, tubes with corners can be difficult to reach and we may not be able to fully clean your model.

We recommend creating multiple access points to holes and small tubes so that we can properly clean your model.

Laser Lines

Our printers operate with two lasers at the same time. If a product in the printer is located in the overlap plane where the two lasers meet, miniscule calibration differences between the lasers may create a visible line on the surface of the product. We aim to arrange products in the printer away from the overlap plane. However, products larger than 33cm long in any direction may be too large to fit in one laser's area, so you may see a visible line along the overlap plane on your product.

PRICING

How will the price of my model be calculated?

  • Material Volume - the amount of material needed to 3D print your product
  • Machine Volume - the amount of space your product takes inside our 3D printers
  • Number of parts - a part is a piece of a model that can be separated from other pieces of the model
  • Production - associated production costs including labor; quality control; machine maintenance; general utilities; and other supporting services required to 3D print your product

What is the minimum price per part?

    $15.00

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