Quantitation of Residual Solvents in Industrial Polyurethane Coated Fabrics
Gas chromatography mass spectrometry quantitation of residual solvents in polyurethane fabrics demands liquid extraction to prevent border detentions.
Polyurethane Coated Fabric
Composite Textile
Synthetic composite material combines a base fabric layer with a thin polymer film to create a water-resistant surface. Choosing polyurethane coated fabric allows manufacturers to produce apparel that resists wind and rain while remaining lightweight. The base layer usually consists of woven polyester or nylon.
Coating Process
The coating is applied either by direct spreading of liquid polyurethane onto the textile or by laminating a pre-formed film using adhesives. Spreading requires a knife-over-roll system where a blade controls the thickness of the polymer paste as it passes over the moving fabric. The fabric then enters a curing oven where heat evaporates the solvent and solidifies the polyurethane layer.
This heating step ensures that the polymer adheres to the textile fibres. The resulting barrier resists liquid water but can be engineered to allow water vapor to escape.
Fabric Performance
This composite material is commonly used in rainwear, activewear and technical upholstery due to its durability. Testing the hydrostatic head and breathability of the fabric confirms its outdoor performance before garments are manufactured.
Quality Standard
Periodic inspection for delamination and cracking ensures that the synthetic layer remains intact during laundering. This check is essential for garment longevity.