PETG MDT (Magnetically detectable)

Smart Materials

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PETG MDT is detected by all types of metal detectors, without being composed of any contaminating element.

Within the world of 3D FDM printing the manufacturer Smart Materials 3D is known for its special filaments, such as ABS Fireproof and ABS Medical, developed with great care, thus being the pointers in its fields of application. In this case, this Spanish manufacturer presents the PETG MDT (Magnetically detectable thermoplastic).

PETG is a material that is born by improving PET, a non-toxic thermoplastic polymer used in the manufacture of clothing and products such as containers. PETG offers the possibility of manufacturing resistant and lightweight parts, at the level of materials commonly used in the industry, such as ABS. In certain sectors of the industry these properties are needed, but with a peculiarity to older, that are magnetically detectable. This property is increasingly demanded by the food sector and others that must control the contamination of their products in an exhaustive manner.Food mold

Image 1: Food mold. Source: Smart Materials 3D

The PETG MDT fulfills the aforementioned properties as it is a filament for 3D printing designed to be detected by a magnetic detector, even in cases where the amount of material is very small. One of the reasons why PETG MDT stands out, which is not usual in this type of filament, is to be detected by all types of metal detectors available on the market, both those that use a permanent magnet and the most current, that work with balanced coils.

To achieve the function of being magnetically detected, PETG MDT does not need to include toxic elements such as steel fibers or metal powders in its composition, nor elements that, apart from being harmful, wear the HotEnd as carbon, graphite or carbon black fibers. For this reason, PETG MDT does not release dust, particles or fumes into the work atmosphere during printing or contaminates the processes that are carried out with parts made of this material.

Piece for food processing

Image 2: Piece for food processing. Source: Smart Materials 3D

All the aforementioned together with being able to contact food, moisture resistance (fungi, mold, etc.) and its high dimensional stability make PETG MDT an ideal filament for the food industry, a sector that is increasingly using technology 3D printing to make final parts (tools, tools, containers, etc.) and where the absence of contaminants of any kind is key to pass all food quality controls. There are also other very interesting applications, such as the manufacture of sensors, intelligent packaging or any other type of element that needs to be magnetically detectable.

Impact strength (KJ/m2) 2.9
Elongation at break (%) 3.6
Tensile strength (MPa) 35
Tensile modulus (MPa) 2450
Flexural strength (MPa) 35
Flexural modulus (MPa) 2450
Softening temperature (ºC) 72
Detectable Detectable
Lightweight Lightweight
Alimentary use Alimentary use
Hide color variations (Hide color variations)

Although the ideal printing temperature of the PETG MDT can vary with each 3D printer, the average is 230ºC. If it is printed at a temperature that is too high, bubbles may appear in the print and if it is printed at a low temperature it may have a completely opaque finish. (The printing range ranges from 220ºC to 240ºC).

The printing speed is recommended to print at the same as the ABS (40-60 mm/s) although it must be adjusted according to the geometry of each piece.

The ideal base temperature ranges from 70 to 90°C. It is necessary to use a nozzle of 0.6 mm in diameter and a layer height equal to or greater than 0.2 mm for the manufacture of any type of parts, thereby avoiding that the load incorporated into the material can block the extruder. In addition, the use of SMART CLEAN is recommended once each print is finished to prevent the PETG MDT from mixing with the subsequent print material.

General information
Manufacturer Smart Materials (Spain)
Material PETG MDT (Magnetically Detectable)
Format Pack of 50 g
Spool of 0.75 kg
Density 1.57 g/cm3
Diameter of filament 1.75 or 2.85 mm
Diameter tolerance ±0,05 mm (Ø 1.75 mm)
±0,03 mm (Ø 2.85 mm)
Filament length ±199 m (Ø 1.75 mm-0.75 kg)
±75 m (Ø 2.85 mm-0.75 kg)
Color 1.75 mm - Blue
2.85 mm - Grey
RAL/Pantone -
Print settings
Printing temperature 220-240ºC
Print bed temperature 70-90ºC
Chamber temperature Not necessary
Cooling fan Recommended
Recommended printing speed 40-60 mm/s
Mechanical properties
Izod impact strength -
Charpy impact strength (ISO 179/1eU) 2.9 kJ/m2
Elongation at break (ISO 527) 3.6%
Tensile strength (ISO 527) 35 MPa 
Tensile Modulus (ISO 527) 2450 MPa
Flexural strength -
Flexural modulus -
Surface hardness -
Thermal properties
Softening temperature (ISO 75) 64ºC 
Melting temperature -
Specific properties
Transparency  -
Additional Information
HS Code 3916.9
Diameter coil (outer) 200 mm 
Diameter coil (inner hole) 55 mm
Coil Width 70 mm 

* The typical values detailed in this table should be considered as a reference. Actual values may vary depending on the 3D printer model used, part design and printing conditions. We recommend confirming the results and final properties with own tests. For more information you should consult the technical data sheet of the product.

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