How strong or how applicable is a material for your purpose?
This is gradually becoming the next step in the evolution of 3D-printing. Now that the 3D-printers are more advanced, data about the properties of the materials is becoming more and more important to the professional end-user.
Innofil3D manufacturer of FDM filaments has set the bar by tensile bar testing it’s standard materials ABS, PLA and PET according the ISO 527-1 test method.
This method is common in the injection moulding industry to assess how strong and applicable a material is. Our aim is to supply the professional user with data to really compare 3D-printing against traditional production methods.
All newly developed materials will also have this data available.
In order to acquire the data presented for all our materials – tensile strength tests were conducted according to the ISO 527-1 standard.
Strength of Innofil3D filament tested
First a 3D model – a tensile bar – which matches the measurements stated in this ISO standard was 3D printed and tested.
However we encountered a few shortcomings with the ISO 527-1 method regarding the comparability with 3D printing. This is because this method is designed for testing tensile bars obtained by injection moulding.
To compensate these differences we made some additions to the tests;
For example; the ISO 527-1 method does not account for the direction wherein the part is created.
This makes totally sense because it does not matter for injection moulding.
For 3D printing however, the direction of printing the object is of great significance for the tensile strength perceived.
To quantify the strength the Innofil3D standard materials, two directions for printing were chosen; flat and vertical (shown in picture below).
As you can imagine – the direction of the layers is of great influence to the strength!
Both directions, flat and vertical, were printed with an infill of 50 and 100%. The 50% was chosen to mimic the conditions which is generally used within the 3D Printing Community.
The 100% infill shows the potential strength an object can get in relation to injection moulding.
With introducing this method we want to create safeguards for the quality of our professional Innofil3D filament.