Technical Design
Protective systems designed for maritime transport utilize moisture-absorbing salts within sealed layers to prevent humidity damage to finished apparel. Use of calcium chloride barrier packaging involves a combination of high-capacity desiccants and breathable yet waterproof films. Materials used in this setup allow water vapour to enter the packet but prevent the resulting liquid from leaking out.
A single packet is more effective than traditional silica gel for long ocean voyages.
Moisture Mechanism
Chemical attraction between the salt and water vapour pulls humidity out of the air. Within calcium chloride barrier packaging, the salt crystals dissolve into a brine as they absorb moisture. The membrane layer ensures that this corrosive liquid remains contained and does not touch the garments.
Shipping Efficacy
Performance of the system is measured by the total weight of water captured during the trip. Because calcium chloride barrier packaging can absorb several times its own weight in moisture, it provides a high level of protection for moisture-sensitive fabrics like wool or silk. Fewer packets are required per container compared to mineral-based alternatives.
Storage Safety
Integrity of the seal is the most important factor in preventing leaks. When calcium chloride barrier packaging is used correctly, it keeps the relative humidity inside the carton below the point where mould can grow. Routine inspections of the packets at the destination confirm the success of the moisture control strategy.
