Determining Moisture Regain Standards in Raw Textile Imports
Determine commercial moisture regain standards through representative bale core sampling and forced-draft oven drying to convert net shipping mass into billable commercial weight.
Desiccant Load
Moisture Control
The mass of moisture-absorbing material required to protect a cargo of packed garments from humidity during transit represents a critical shipment variable. Calculating the appropriate desiccant load ensures that the air within a sealed shipping container remains below the threshold where mold can develop. This value depends on the transit duration and the initial moisture content of the cardboard packaging.
Calculation Factor
Determining the correct quantity of silica gel or calcium chloride requires evaluating both the internal volume of the container and the hygroscopic nature of the cargo. A standard shipment of finished cotton apparel contains substantial moisture that can release into the air when temperatures drop. This release creates condensation on the container walls, which can lead to staining and product deterioration if the desiccant load is insufficient during long ocean transits.
Placement Standard
Positioning the absorbing units strategically throughout the container maintains uniform humidity levels. Hanger-style bags suspended from the internal lashing points prevent local moisture accumulation near the roof. This distribution method keeps the protective material close to the source of rising warm air where moisture is most active.
Performance Evaluation
Weighing the returned packets at the destination port provides empirical data on the actual humidity encountered. If the units have reached maximum capacity, the shipment was exposed to higher humidity levels than anticipated. This feedback loop allows logistics managers to adjust future shipments to avoid product damage.