As a seasoned supplier in the FDM Printing industry, I understand the crucial role that proper filament storage plays in maintaining the quality and performance of 3D prints. Filaments are like the lifeblood of FDM printing, and how you store them can significantly impact your printing results. In this blog, I’ll share some in – depth insights on how to store FDM filaments properly. FDM Printing
Why Proper Filament Storage Matters
Before delving into the storage methods, let’s first understand why it’s so important to store FDM filaments correctly. FDM filaments, such as PLA, ABS, PETG, and nylon, are hygroscopic materials. This means they have a tendency to absorb moisture from the surrounding environment. When filaments absorb moisture, several issues can arise.
Moisture – laden filaments can cause bubbles, gaps, and rough surfaces in 3D prints. The steam generated from the evaporated moisture can lead to inconsistent extrusion, resulting in weak and brittle parts. Additionally, the mechanical properties of the printed objects may be compromised. For example, parts printed with wet filaments may have lower tensile strength and poor layer adhesion.
Assessing Your Storage Environment
The first step in proper filament storage is to assess the environment where you plan to keep the filaments. Temperature and humidity are the two most critical factors.
Ideally, the storage temperature for most FDM filaments should be between 18°C – 25°C (64°F – 77°F). Avoid extreme temperatures, as high temperatures can cause the filaments to become soft and deform, while low temperatures can make them brittle.
Humidity is an even more significant concern. A relative humidity (RH) level below 40% is recommended. High humidity levels provide ample moisture for the filaments to absorb. You can use a hygrometer to measure the humidity in the storage area regularly. If the humidity is too high, you may need to take additional steps to control it, such as using a dehumidifier.
Storage Containers
Choosing the right storage containers is vital for protecting your filaments from moisture and other environmental factors.
- Sealable Plastic Containers: These are a popular and cost – effective option. Look for containers with tight – fitting lids. You can place desiccant packs inside the container to absorb any moisture that may enter. Make sure to label the containers clearly to indicate the type of filament and its color.
- Vacuum Storage Bags: Vacuum storage bags can create an airtight environment around the filaments. By removing the air, you reduce the amount of moisture that can come into contact with the filaments. However, be careful not to damage the filaments when using a vacuum sealer.
- Filament Storage Cabinets: Designed specifically for filament storage, these cabinets often come with built – in humidity control systems. Some models have adjustable shelves to accommodate different filament spool sizes. They may also have transparent doors, allowing you to easily see which filaments you have.
Using Desiccants
Desiccants are substances that absorb moisture from the air. They are an essential part of filament storage.
- Silica Gel: Silica gel is one of the most commonly used desiccants. It comes in small packets and can be easily placed inside the storage containers. Silica gel can be recharged by heating it in an oven at a low temperature (around 150°C – 200°C or 302°F – 392°F) for a few hours.
- Calcium Chloride: Calcium chloride is a more powerful desiccant than silica gel. It can absorb a large amount of moisture quickly. However, it is more corrosive, so it should be used with caution. You can use it in a separate container within the filament storage area.
Storing Filament During Printing
Even when you are in the middle of a printing job, proper storage is crucial.
- Filament Dry Boxes: These boxes can be used to keep the filament dry while it is being fed into the printer. They often come with a small heater or desiccant to maintain a low – humidity environment. Some filament dry boxes can also be connected directly to the printer, ensuring a continuous supply of dry filament.
- Sealed Filament Tubes: If you don’t have a filament dry box, you can use sealed tubes to store the unused portion of the filament during printing. Make sure to close the tube tightly after each use.
Monitoring and Maintenance
Regular monitoring and maintenance are necessary to ensure that your filaments remain in good condition.
- Check the Desiccants: Periodically check the desiccants to see if they need to be replaced or recharged. If the silica gel has turned from blue to pink, it means it is saturated with moisture and needs to be recharged.
- Inspect the Filaments: Look for any signs of damage, such as cracks or kinks, on the filaments. If you notice any issues, it’s best to remove the damaged section before using the filament for printing.
- Clean the Storage Area: Keep the storage area clean and free from dust and debris. Dust can contaminate the filaments and affect the printing quality.
Considerations for Different Filament Types
Different types of FDM filaments have different storage requirements.
- PLA: PLA is relatively less hygroscopic compared to other filaments. However, it can still absorb moisture over time. Store PLA in a cool, dry place, and it should be fine for most printing applications.
- ABS: ABS is more hygroscopic than PLA. It requires a more controlled storage environment. Use desiccants and airtight containers to keep ABS filaments dry.
- PETG: PETG is known for its good layer adhesion and strength. It also has a moderate hygroscopic property. Similar to ABS, proper storage with moisture control is essential for PETG filaments.
- Nylon: Nylon is highly hygroscopic. It can absorb a significant amount of moisture in a short period. Store nylon filaments in a sealed container with a powerful desiccant, and if possible, use a filament dry box during printing.
Long – Term Storage
If you plan to store filaments for an extended period, you need to take extra precautions.
- Vacuum Sealing and Freezing: For long – term storage, you can vacuum – seal the filaments and store them in the freezer. Freezing the filaments can prevent moisture absorption and keep them in a stable state. However, when you take the filaments out of the freezer, make sure to let them reach room temperature before opening the vacuum – sealed bag to avoid condensation.
- Regular Inspection: Even in long – term storage, it’s important to periodically inspect the filaments. Check for any signs of freezer burn or other damage.
In conclusion, proper filament storage is a comprehensive process that requires careful consideration of various factors, including the storage environment, containers, desiccants, and the specific requirements of different filament types. By following these guidelines, you can ensure that your filaments remain in optimal condition, leading to high – quality 3D prints.
SLA Printing As a reliable FDM Printing supplier, I am committed to providing you with the best filaments and the knowledge to use them effectively. If you have any questions about filament storage or are interested in purchasing our high – quality FDM filaments, don’t hesitate to reach out for a purchase discussion. I look forward to assisting you in achieving your 3D printing goals.
References
- "3D Printing Handbook" by John D. W. Madden
- "Fundamentals of 3D Printing: Materials, Processes, and Applications" by Ian Gibson, David W. Rosen, Brent Stucker
Dongguan Xinchuan Precision Manufacturing Co., Ltd.
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