Moisture Regain Standards in Commercial Yarn Weight Verification
Commercial yarn weight verification relies on oven-dry mass determination modified by standard moisture regain percentages to determine billable weight.
Package Condensation
Moisture Accumulation
Liquid water forms on the interior surface of plastic wrapping or shipping containers when the dew point of the internal air is reached during temperature fluctuations. Most instances of package condensation occur during the cooling phase of a shipment as it moves from a warm factory into a cold transport vehicle. This transition forces the air to release its moisture, which then settles on the textile surface.
Physical Damage
Localized wetting of the fabric can lead to water spotting and dye migration. When package condensation is left unaddressed, the moisture creates an environment where fungal spores can germinate and feed on the sizing agents. These stains are often permanent and cannot be removed without damaging the structural integrity of the garment.
Prevention Strategy
Desiccant packs and perforated films are used to manage the relative humidity inside the sealed unit. The inclusion of these tools helps to mitigate package condensation by absorbing excess water vapor.
Inspection Procedure
Quality control teams check for fogging or visible droplets inside the transparent wrapping during the final audit. If package condensation is detected, the entire lot must be opened, dried, and re-packed to prevent long-term degradation. This rework adds measurable cost and time to the production schedule but is necessary to maintain the grade of the finished goods.