Desiccants in the Food Industry

In the food industry, desiccants are mainly used to absorb moisture inside packaging, reduce humidity, and prevent foods from becoming damp, moldy, oxidized, or degraded in quality. They help extend shelf life, preserve texture and appearance, and improve storage and transportation stability.

1. A bakery company selling individually wrapped cookies faced complaints in humid regions because the products lost crispness and became soft. By adding 1g–2g food-grade silica gel desiccants into each package and using high-barrier laminated film, the internal package humidity was reduced, product crispness was maintained, and customer complaints about moisture-related quality issues decreased significantly.

2. Seaweed is extremely sensitive to moisture. During humid seasons and long-distance transportation, products often become soft and lose their crisp texture. By placing 0.5g–1g silica gel desiccants in each bag, and in some premium cases combining desiccants with oxygen absorbers, manufacturers can effectively
preserve crispness, maintain flavor quality, and improve shelf-life stability.

3. Nuts such as cashews, almonds, peanuts, and pistachios face dual risks: moisture absorption can soften texture, while fats may oxidize and produce rancid flavors. A combined solution of 1g–3g silica gel desiccants, oxygen absorbers, nitrogen flushing, and high-barrier packaging helps reduce moisture-related softening and slows oxidation, preserving crunch and aroma throughout shelf life.

4. Powdered food products can easily absorb moisture and form lumps, reducing flowability and affecting dissolution performance. For canister packaging, placing 2g–10g food-grade desiccants at the top of the container, along with strong sealing and foil induction liners, helps minimize caking and maintain powder
looseness and usability.

5. For instant noodle seasoning packs, hotpot soup bases, dipping powders, and compound spice blends, moisture can cause clumping and flavor loss. Adding small silica gel desiccants (0.5g–1g) into the outer package or overall kit helps maintain powder flowability, improve product appearance, and preserve user
convenience.

6. Products such as dehydrated mushrooms, dried fruit and vegetable chips, wolfberries, and sliced jujube are prone to moisture regain, softening, discoloration, and mold risk. Adding 2g–5g silica gel or mineral desiccants to inner packaging, plus larger moisture-control packs in cartons or shipping boxes, helps reduce spoilage risk and improve long-distance transport stability.

7. Desiccant selection should be based on food type, packaging volume, barrier performance of packaging materials, target shelf life, and storage/transport conditions. Crispy foods prioritize moisture protection, oily foods may require both moisture and oxygen control, powdered foods focus on anti-caking, and export or
high-humidity environments may require higher desiccant capacity or combined solutions.

8. Always use food-grade desiccants with compliant packaging materials, ensure the sachet is strong and leak-resistant, and clearly label it as 'Do Not Eat'. The desiccant size should match the package volume and moisture load. Desiccants control moisture, while oxygen absorbers remove oxygen; in some products such
as nuts, seaweed, and meat floss, both can be used together for better reservation.

Desiccants are widely used in biscuits, seaweed snacks, nuts, milk powders, seasoning powders, dehydrated vegetables, and dried food products. Their core value is to control package humidity, reduce moisture-related quality problems, extend shelf life, and improve consumer experience. In practice, the best results come from selecting the right desiccant type and dosage based on product characteristics, packaging materials, and distribution environment.