

FLXR Engineering is a cutting-edge company specialized in the production of high-quality filaments for 3D printing. Their focus is on providing advanced materials that meet the most demanding requirements of sectors such as chemical, biomedical, cosmetic, and medical industries. With a continuous commitment to innovation and safety, FLXR Engineering has positioned itself as a leader in creating filaments that offer exceptional performance and comply with strict regulatory standards, such as the USP 88 Class VI certifications.
The PEN filament (Polyethylene Naphthalate) is specifically designed for high-demand 3D printing applications. This material stands out for its biocompatibility and chemical resistance, making it ideal for sectors that require durable and safe products. With the recent certification of USP 88 Class VI, the PEN filament has proven to maintain its biological integrity throughout the printing process, opening new opportunities in medical and food markets.
The USP 88 Class VI certification stands as the most demanding standard in in vivo testing, allowing materials to be in contact with blood or implanted in the human body. While final medical devices require specific ISO certifications, meeting this standard is an essential requirement for materials in medical applications.
The PEN filament from FLXR Engineering is ideal for critical sectors such as chemical, biotechnology, cosmetic, medical, and wastewater treatment. Some of its applications include:
This filament is the perfect choice for professionals seeking high-performance materials and regulatory compliance. With its USP 88 Class VI and USP 87 certifications, it ensures biocompatibility and safety during the 3D printing process. It is ideal for demanding applications requiring chemical resistance, advanced barrier properties, and durability under harsh conditions.
The PEN filament from FLXR Engineering stands out for its ability to maintain biological integrity and exceptional functionality during the 3D printing process. Thanks to its biocompatibility, chemical resistance, and advanced barrier properties, this material positions itself as a reliable, safe, and high-performance solution for developing demanding 3D printing projects in critical environments.
This filament is also a very interesting option for medical or biotechnological applications.
Biocompatible parts manufactured typically by SLA, DLP, or MJF technology are generally based on PMMA, which cannot be sterilized by autoclave. Therefore, other sterilization methods are used, such as Ethylene oxide (EtO, a low-temperature option but with health risks and strict safety protocols), Gamma radiation (effective when carefully controlled), or other low-temperature methods like Hydrogen peroxide (H₂O₂) or high-level disinfection with ortho-phthalaldehyde (OPA), which offer gentler alternatives but at a much higher cost.
With PEN filament, we can have a biocompatible and sterilizable material using a highly reliable, accessible, and economical method like autoclave.
High temperature/pressure | Chemical | Radiation | |||
---|---|---|---|---|---|
Autoclave | EtO Gas | OPA | H₂O₂ | Gamma | |
Temperature (°C) | 121 - 135 | 50 - 60 | 45 - 50 | 20 | 30 - 40 |
Time cycle | 10 - 50 min | 16 - 18 hours | 15 - 20 min | 55 - 70 min | 12 - 20 hours |
Sterilizing agent | Steam | EtO gas | o-phthalaldehyde | Hydrogen peroxide | Radiation |
Sterilization | ✓ | ✓ | ✓ | ✓ | |
Disinfection | ✓ | ||||
User safety | ✓ | ✓ | ❌ | ✓ | ✓ |
Advantages | Widely available. Proven effectiveness. Economical. | Low temperature. Proven effectiveness. | Fast. Mainly with surgical chambers. | Proven effectiveness. Wide range of available materials. No ventilation required. | Economically competitive. Proven effectiveness. Simple use. |
Disadvantages | High temperature and humidity can damage materials. Possible corrosion. | Very long time cycles. Generates toxic byproducts. High cost. Health risks. | High cost. Disinfectant, not sterilizing. | Very high cost. | Not compatible with all materials |
Compatible with 3D printed parts | PC, PEEK, PEI, PEN, PPSU | All | PC, PEEK, PEI, PEN, PPSU, PMMA | PC, PEEK, PEI, PEN, PPSU | ABS, PC, PEEK, PEI, PEN, PPSU, PMMA (with caution) |
General information |
|
Material | PEN |
Format | Spool |
Density | - g/cm³ |
Filament diameter | 1.75 / 2.85 mm |
Printing properties |
|
Printing temperature | 270 - 285 ºC |
Printing temperature | 270 - 280 ºC |
Print bed temperature | 70 - 90 ºC |
Mechanical properties |
|
Izod impact strength | (ISO 180:2019) 3.1 KJ/m² |
Elongation at break | (ISO 527-2) XY: 10.1%, YZ: 2.4%, ZX: 0.5 % |
Tensile strength | (ISO 527-2) XY: 75.2 MPa, YZ: 51.9 MPa, ZX: 22.2 MPa |
Tensile modulus | (ISO 527-2) XY: 2717 MPa, YZ: 2435 MPa, ZX: 2534 MPa |
Flexural strength | (ISO 178:2019) XY: 100.3 MPa, ZX: 43.1 MPa |
Flexural modulus | (ISO 178:2019) XY: 2263 MPa, ZX: 1.9 MPa |
Surface hardness | - |
Thermal properties |
|
Softening temperature | (ISO 306/A120, Vicat) 122.1 ± 0.7 ºC |
Specific properties |
|
Chemical resistance | ✓ |
FDA certification | ✓ |
Other |
|
HS Code | 3916.9 |