Tenax Migration Testing Parameters for Recycled Packaging Hydrocarbon Verification
Modified solid simulant Tenax TA testing under EN 14338 verifies gas-phase MOSH and MOAH migration from recycled paperboard without false-positive wax interference.
UCM
Uniform Coating Mass
Measured grams per square meter denote the quantity of aqueous or solvent application distributed across a substrate surface to provide barrier or aesthetic functionality. The ucm identifies the amount of chemical or polymer loading sustained by a base sheet during the conversion process. Production controls manage this weight to ensure barrier efficiency against grease or moisture while avoiding blocking issues on the winder.
Deviations from the target volume lead to inconsistent film thickness or failed bond strength in lamination.
Application Tolerance
Precision in dry weight verification dictates how closely the coating head maintains set points under varying line speeds. Operators adjust doctor blade pressure or rod diameter to compensate for viscosity shifts in the fluid supply. Consistent density keeps the roll profile flat to prevent uneven tension during secondary operations.
Excess load increases base sheet curl while insufficient volume permits substrate strike through in sensitive applications.
Performance Constraint
High loading levels restrict the permeability of the treated paper for specialized food packaging or labels. Limits arise from the necessity to maintain base sheet flexibility during folding or scoring. Excessive application degrades mechanical strength properties because the chemical weight adds mass without providing tensile support.
The threshold for success involves balancing the protective film thickness against the brittle nature of the dried residue.