3D printing in TPU RESIN

Flexible TPU resin (thermoplastic polyurethane) is a popular material in 3D printing using SLA, known for its elasticity and versatility. This resin is ideal for creating parts that require flexibility and durability, thanks to its ability to withstand deformation without breaking and its excellent wear resistance. In addition, TPU allows for the creation of precise details and smooth finishes, making it perfect for applications that demand a high level of aesthetic quality.

Its combination of flexibility and strength makes it ideal for functional prototypes and customizable accessories that require both performance and comfort.

Advantages of TPU Resin

When is the perfect material choice?

Allows for the creation of precise details and smooth finishes

Ideal for prototyping parts that would normally be produced in rubber or TPU

Can stretch up to 120% of its original shape

Good tensile strength for objects under load

Disadvantages of TPU Resin

When to look for other material options

Not compatible with skin contact applications

Supports are hard to remove and can leave behind scarring and nubs

Not great for printing small cavities or holes

No custom color options available

Available Colors

Dark gray

Technology used

SLA, or stereolithography, is an additive manufacturing process that uses an ultraviolet light laser in a tank to build objects from resin. It is used for the production of both final parts and the creation of models, prototypes, or patterns.

In this case, a 3D model must also be available, which is built by slicing the file into thin layers using specialized software. A support structure is created, where necessary, to manage overhangs and cavities.

Once the layer to be printed has been created, the equipment's lifting platform descends a distance equivalent to the thickness of a solidified resin layer (usually between 0.05 and 0.15 mm). A blade sweeps across the piece, leaving a new layer of liquid resin on the surface of the tank, ready for the next laser printing. In this way, a three-dimensional piece is created layer by layer. Once the piece is complete, it is submerged in a chemical bath that removes the excess resin and then cured in a ultraviolet light oven.

Technical specifications

Property	Value	Test Method
Tensile Strength	8,5 MPa	ASTM D412-06
Tensile Failure	75-85%	ASTM D412-06
Tear Resistance	13,3 – 14,1 kN/m	ASTM D624-00
Dureza Shore	80 – 85 A	ASTM 2240

Data Sheet

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