Desiccants are substances that effectively remove moisture from damp materials and are widely used for moisture protection in various products such as food, pharmaceuticals, electronic products, and clothing. Their core function is to reduce environmental humidity, preventing items from becoming damp, moldy, rusted, or malfunctioning.
Basic Characteristics
Strong Hygroscopicity: Desiccants must possess highly efficient moisture absorption capabilities, rapidly absorbing water vapor from the air in a sealed environment to maintain a low humidity level.
High Safety: Desiccants used, especially in food and daily necessities packaging, must be non-toxic, odorless, non-corrosive, and environmentally friendly, causing no harm to humans or goods. For example, silica gel and montmorillonite desiccants are widely considered safe and environmentally friendly.
Good Chemical Stability: Most physical desiccants (such as silica gel) are chemically stable, do not react with the protected material, and are resistant to acids and alkalis (except strong alkalis and hydrofluoric acid), making them suitable for use in various environments.