What is the primary purpose of a desiccant in material storage?

The primary purpose of a desiccant in material storage is to absorb moisture from the air and maintain a low-humidity environment. Many materials used in 3D printing, particularly polymers like Nylon, PLA, and PETG, are hygroscopic, meaning they readily absorb moisture from the atmosphere. Excessive moisture absorption can negatively affect the material's properties and printing performance, leading to issues such as reduced strength, poor layer adhesion, and nozzle clogging. A desiccant is a substance that attracts and holds moisture, typically through adsorption or absorption. By placing a desiccant within a sealed container with the 3D printing material, the humidity inside the container is kept low, preventing the material from absorbing excessive moisture and preserving its original properties. Common desiccants include silica gel, calcium sulfate, and molecular sieves.