Maya Ellison
There are concerns about the potential health risks of inhaling fumes from PLA plastic, which is commonly used in 3D printing. While the solid form of PLA is generally considered non-toxic, the heating and melting of PLA during the printing process can release fumes containing small particles and chemicals, including volatile organic compounds (VOCs) and ultrafine particles (UFPs). These fumes can cause respiratory irritation, especially for individuals with pre-existing respiratory issues, and the long-term effects of exposure are still unknown. To minimise the potential risks associated with PLA fumes, it is recommended to use 3D printers in well-ventilated areas or enclosed spaces with air purification systems.
| Characteristics | Values |
|---|---|
| Toxicity | PLA fumes are considered less toxic than other 3D printing materials like ABS due to the absence of known carcinogens. However, they contain ultrafine particles (UFPs) and volatile organic compounds (VOCs) that can cause respiratory irritation and other health issues. |
| Health Risks | Potential short-term respiratory irritation from prolonged exposure. Long-term effects are unknown and require further investigation. UFPs can penetrate deep into the lungs and potentially enter the bloodstream. Individuals with pre-existing respiratory issues may be especially vulnerable. |
| Precautions | Use in well-ventilated areas or with an air purifier system. Some recommend using a filtered enclosure and venting it out. Avoid using in living spaces or sleeping quarters. |
| Comparisons | Studies have shown that PLA fumes have lower VOC levels than those produced during cooking. PLA releases fumes at levels comparable to everyday activities like burning a candle. |
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What You'll Learn
PLA fumes are less toxic than other plastics
While there are concerns about the potential health risks of inhaling PLA fumes, these are generally considered less severe compared to other plastics like ABS or PETG. This is mainly due to the absence of known carcinogens like styrene in PLA fumes.
PLA (polylactic acid) is a commonly used material in 3D printing due to its ease of use, low warping, good adhesion, and creative freedom in design. When heated, PLA releases volatile organic compounds (VOCs) and ultrafine particles (UFPs) that can cause respiratory irritation, particularly in individuals with pre-existing respiratory issues. However, the levels of harmful fumes produced by PLA are typically lower than those of other plastics.
Studies have shown that PLA emits UFPs, which are minuscule particles that can penetrate deep into the lungs and potentially enter the bloodstream. These particles have the potential to cause short-term respiratory irritation, with symptoms such as coughing, sneezing, or throat discomfort. However, the long-term effects of PLA fumes are still unknown and require further investigation.
It is important to note that the presence of additives, dyes, or other plastic compounds in PLA can affect its toxicity. Some PLA brands have been found to release only twice fewer chemicals than ABS, a significant decrease from the original 17 times fewer chemicals than ABS. Nonetheless, PLA is still considered a safer option for 3D printing when compared to other materials.
To minimize the potential health risks associated with PLA fumes, it is recommended to use 3D printers in well-ventilated areas or enclosed spaces with air purification systems. Additionally, safety measures such as wearing safety glasses and respirators can help protect against airborne particles and fumes.
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Ultrafine particles (UFPs) in PLA fumes
The popularity of three-dimensional (3D) printers has raised concerns about the health effects of inhaling PLA fumes. Ultrafine particles (UFPs) are among the emissions from 3D printers that use PLA filament. UFPs are tiny particles that can be easily inhaled. They are of concern because of their minuscule size, which allows them to penetrate deep into the lungs and potentially enter the bloodstream.
Studies have detected the emission of UFPs during the 3D printing process with PLA. The heating and melting of PLA cause it to release these particles, along with chemicals called volatile organic compounds (VOCs). The emission rates of UFPs from a 3D printer using PLA filament are estimated to be large, ranging from approximately 2.0 × 10^10 # min^-1 to 1.9 × 10^11 # min^-1.
The health risks associated with inhaling UFPs from PLA fumes are a concern, particularly for people with existing respiratory conditions. Inhalation of PLA fumes can cause short-term respiratory irritation, with symptoms such as coughing, sneezing, throat discomfort, and irritation in the nose, throat, and lungs. Some individuals may also experience headaches or nausea after breathing in PLA fumes, especially in poorly ventilated areas.
While the long-term health effects of exposure to UFPs in PLA fumes are unknown, there are concerns about potential serious health problems with prolonged exposure. The minuscule size of UFPs, regardless of their chemical composition, presents potential health risks. It is recommended that additional measurements be conducted to more accurately assess personal exposure to UFPs and the potential health risks associated with their inhalation.
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Volatile organic compounds (VOCs) in PLA fumes
Volatile organic compounds (VOCs) are released during the 3D printing process when using PLA filament. VOC emission levels are influenced by the temperature, type of PLA filament, nozzle temperature, filament brand, printer brand, and filament colour. PLA emits VOCs in the form of lactide, which is generally considered non-toxic in low concentrations. However, prolonged exposure or exposure to high levels of VOCs can lead to respiratory irritation or other health issues, especially for individuals with respiratory sensitivities or pre-existing conditions.
The emission of VOCs from PLA has been studied using solid-phase microextraction-gas chromatography-time-of-flight mass spectrometry and proton transfer reaction time-of-flight mass spectrometry. These techniques help identify and monitor the release of VOCs during the thermal degradation of PLA filaments and 3D printing.
While PLA emits fewer VOCs than other filaments like ABS, it is important to acknowledge the potential for fume generation and take precautions. Ventilation is crucial when working with PLA, as it helps disperse fumes effectively. Using a housing for the printer can also contain the fumes within a designated space, reducing exposure.
Additionally, it is recommended to opt for low-emission PLA filaments designed to minimize fume generation. While studies on the long-term health effects of PLA fumes are limited, it is important to stay informed about evolving safety practices to ensure well-being while embracing the benefits of 3D printing.
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Respiratory irritation from PLA fumes
While PLA fumes are considered less harmful than other materials used in 3D printing, there are still concerns about the potential health risks of inhaling them. The primary concern regarding respiratory irritation from PLA fumes centres around the emission of Ultrafine Particles (UFPs) and Volatile Organic Compounds (VOCs) during the 3D printing process.
UFPs are minuscule particles that can penetrate deep into the respiratory system and potentially enter the bloodstream. While studies suggest that the UFPs released by PLA may not pose significant chemical risks, they share characteristics with other UFPs, and their small size presents potential health concerns. Some individuals, especially those with pre-existing respiratory issues, may experience irritation of the throat, nose, and eyes due to these particles. Symptoms of respiratory irritation can include coughing, sneezing, and throat discomfort.
VOCs, such as lactide, are released when PLA is heated. While generally considered non-toxic in low concentrations, prolonged or high-level exposure to VOCs may lead to adverse health effects, particularly for individuals with respiratory sensitivities. It is important to note that the long-term health effects of inhaling PLA fumes are still unknown and require further investigation.
To minimise the potential for respiratory irritation, it is recommended to use PLA filaments in well-ventilated areas, with open windows or doors to promote air circulation and disperse fumes. Alternatively, using a housing or enclosure for the printer can help contain the fumes within a designated space, reducing exposure. Additionally, opting for low-emission PLA filaments designed to minimise fume generation can further decrease the potential for respiratory irritation.
While PLA printing is considered safer than other materials, it is crucial to take precautions to ensure the well-being of those exposed to the fumes. By implementing these measures, users can enjoy the benefits of 3D printing with PLA while minimising potential health risks.
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Safety precautions for PLA printing
While Polylactic Acid (PLA) is one of the most commonly used materials in 3D printing, there are some safety precautions to be aware of when printing with it. Here are some detailed instructions to ensure safety when working with PLA:
Ventilation
It is crucial to ensure proper ventilation when printing with PLA. Open windows or use an air purifier system near the printer to maintain a constant flow of fresh air. If possible, use the printer in a well-ventilated room or area, and avoid printing in bedrooms or sleeping areas. Consider investing in a 3D printer enclosure to contain the fumes and prevent them from spreading.
Personal Protective Equipment (PPE)
Always wear safety glasses or goggles to protect your eyes from potential airborne particles and irritation caused by fumes or small particles. If you are particularly sensitive to fumes, consider using a respirator or mask to reduce the risk of inhaling harmful particles.
Printer Maintenance
Keep your printer clean and well-maintained to minimise excess emissions. Regular cleaning can help reduce the build-up of particles and improve air quality. Ensure that your printer is in good working condition and that all components are functioning properly.
Limit Exposure
Try to limit your time spent directly near the printer while it is running. The longer the exposure to PLA fumes, the higher the risk of potential health issues. If possible, operate the printer remotely or set up a system where you can start printing and then leave the room.
Filament Choices
When using PLA, opt for low-emission filaments to reduce the overall number of harmful particles released into the air. Some PLA filaments may contain additives or dyes to achieve different colours or properties, which can contribute to increased fumes. Choose PLA filaments that are known to produce fewer emissions.
Fire Safety
While not directly related to fumes, it is important to consider fire safety when working with any type of 3D printer. Ensure that your printer is properly set up and maintained to reduce the risk of fire hazards. Keep flammable materials away from the printer and be cautious when leaving the printer unattended or running overnight.
While PLA is generally considered safer than other materials, it is important to stay informed about evolving safety practices and continue researching the potential long-term effects of PLA fumes. By following these precautions, you can minimise potential health risks and enjoy 3D printing with peace of mind.
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Frequently asked questions
PLA fumes are not known to be fatal, but they do contain Volatile Organic Compounds (VOCs) and Ultrafine Particles (UFPs) that can cause respiratory irritation. It is recommended to use PLA in a well-ventilated area or with an air purifier to minimise potential health risks.
Some studies suggest that prolonged exposure to PLA fumes may cause short-term respiratory irritation. The ultrafine particles (UFPs) released during the 3D printing process can penetrate deep into the lungs and potentially enter the bloodstream, posing health risks. People with existing respiratory issues may be especially vulnerable to these emissions.
To minimise potential health risks, it is recommended to use PLA in a well-ventilated area or outdoors. Opening windows, using an air purifier, or printing in a 3D printer enclosure can help extract fumes from the printing process. Additionally, wearing a respirator or safety glasses can provide further protection from airborne particles.
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