View Count：80
Date：2026-08-24How to prevent mold on exported bags and luggage? Leather bags, suitcases and backpacks molding during sea freight are a frequent cargo loss for bag traders. One 40ft container of moldy bags means hundreds of thousands of RMB in value lost. This article provides a four-stage prevention plan with concrete measures.
1. Why Do Bags Mold During Export?
- Material absorption: leather regain 14%-16%, PU 12%, webbing 8% – they absorb moisture above 65% warehouse humidity;
- Sealed packaging: each bag in a dust bag inside a carton – three layers trap humidity;
- Container rain: 30°C+ swings cause condensation on cartons (moisture can reach 15%+), then mold transfers to bags – 60%+ of sea freight mold incidents.
2. Four-Stage Prevention Plan
| Stage | Measure | Parameters |
|---|---|---|
| Production | Treat leather/PU/webbing before warehousing | Material moisture ≤10% |
| Packaging | Sachets + desiccants in each dust bag | 1 sachet + 1 20g desiccant per bag |
| Container | Desiccants/rods in container | 4-6kg + 8-12 rods per 40ft |
| Arrival | Pick up within 7 days, inspect | Check desiccants and bag surfaces |
3. Why Use Sachets AND Desiccants Together?
They complement each other:
- Sachet: vapor-phase antimicrobial actively kills mold in packaging – solves existing spores;
- Desiccant: absorbs moisture, lowers humidity – solves growth conditions;
- Desiccant only: humidity drops but spores survive and regrow when humidity rebounds; sachet only: spores killed but moisture stays, and after sachet expiry (6-12 months) mold recurs. Combined is the real insurance.
4. Container Moisture Control
Calculate by container volume: desiccant 0.08-0.1kg/m³ – 20ft (~28m³) 2-3kg, 40ft (~56m³) 4-6kg, HC (68m³) 5-8kg. Rods: 1 per 4-5m³, so 8-12 rods for a 40ft, hung at the ceiling where condensation forms. See How Much Desiccant Goes in a Container?
5. FAQ
Q1: Do sachets damage leather?
A: Power Pak is vapor-phase with no direct contact – no impact on leather.
Q2: What does prevention cost?
A: About 0.5-1 RMB per bag for sachet + desiccant – versus hundreds of thousands in container losses.
Conclusion
Bag export mold prevention: do not skip material, packaging, container or arrival control. For a bag prevention plan or products, contact us or explore our solution cases.
