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How should 3D printer filament be stored?

Published in Filament Storage 4 mins read

To store 3D printer filament effectively, the primary method is to use airtight containers. This practice is crucial for maintaining filament quality and ensuring successful prints.

Why Airtight Storage is Essential

3D printer filaments, especially materials like PLA, PETG, and Nylon, are hygroscopic, meaning they absorb moisture from the air. Moisture absorption can lead to significant problems during printing, including:

  • Poor Layer Adhesion: Prints become brittle and layers may not stick together properly.
  • Bubbling or Steaming: Water in the filament turns to steam in the hot nozzle, causing pops and inconsistencies.
  • Increased Brittleness: The filament itself can become brittle and break easily before reaching the extruder.
  • Reduced Print Quality: Stringing, blobs, and inconsistent extrusion can occur.

According to the provided information, using Airtight Containers for your 3D printer filaments will keep the air out from the container and protect the filaments from moisture damage. It emphasizes the importance of using high-quality storage containers to store your filaments safely so that they can last for a long time.

Practical Airtight Storage Solutions

Implementing airtight storage doesn't have to be complicated or expensive. Here are common methods:

  1. Airtight Plastic Bins: These are readily available and come in various sizes. Ensure the lid has a good seal, often with a rubber or silicone gasket.
  2. Vacuum Seal Bags: These bags, often used for food storage, can be sealed with a vacuum pump to remove air effectively.
  3. Dedicated Filament Dry Boxes: Some manufacturers offer specialized boxes designed specifically for filament storage, often including built-in desiccant compartments or even heating elements for drying.

Whichever method you choose, it is important that you use high-quality storage containers to store your filaments safely so that they can last for a long time, as highlighted by the reference.

Adding Desiccants

While airtight containers prevent new moisture from entering, they don't remove moisture already present in the filament or the trapped air. To maximize protection, include a desiccant inside the airtight container.

  • Silica Gel Packets: These are commonly found in packaging for electronics, shoes, and other items. Rechargeable silica gel is available and can be dried out (usually in an oven) and reused.
  • Molecular Sieves: Another type of desiccant offering potentially better performance, especially for very low humidity levels.

Place several desiccant packets in the container alongside the filament spool.

Key Storage Practices

Beyond just using airtight containers, consider these tips:

  • Store in a Cool, Dry Place: Even inside an airtight container, avoiding extreme temperature fluctuations is beneficial.
  • Store Vertically or Horizontally: Ensure the spool is stable to prevent damage or tangling.
  • Label Your Spools: Note the filament type, color, and date of purchase/storage.
  • Dry Filament if Needed: If filament has absorbed moisture, drying it in a filament dryer or oven at a low temperature before storing or printing is recommended.

Storage Method Summary

Here's a quick overview of the recommended filament storage approach:

Aspect Method Benefit
Container Airtight Containers Keeps moisture-laden air out
Moisture Control Add Desiccants (e.g., Silica Gel) Absorbs moisture inside the container
Environment Cool, Dry Location Further protects against humidity & heat
Quality High-quality Containers & Seals Ensures long-term effectiveness of storage

By following these guidelines, you can significantly extend the shelf life of your 3D printer filament and ensure consistent, high-quality prints.

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