Tenax Adsorption Bench Protocols for Differentiating Saturated and Aromatic Mineral Oils
Tenax TA vapor capture combined with LC-GC-FID and chemical epoxidation provides defensible separation of volatile MOSH and MOAH fractions in paperboard.
Breakthrough Volume
Calibration Threshold
Liquid displacement within a porous substrate identifies the breakthrough volume as the point where a barrier coating allows fluid penetration. Paper manufacturers use this measurement to assess the effectiveness of sizing agents applied to cellulose fibres. Coating porosity determines when a solvent or aqueous solution initiates a detectable transition through the sheet.
Resistance to liquid travel remains the primary functional requirement for grades intended for food packaging or high-speed inkjet print.
Penetration Metric
Laboratory testing involves placing a fixed quantity of test fluid on the wire side of the sample while monitoring the underside for moisture transmission. Technicians record the exact amount of liquid needed to overcome the internal sizing barrier or the specific layer of polymer resin. Sheets displaying higher resistance demonstrate superior barrier integrity during wet lamination or high-viscosity coating processes.
Variability in fibre orientation occasionally influences the speed of migration across the web.
Manufacturing Consequence
Conversion efficiency during offset printing or flexible packaging lamination depends upon the stability of this threshold across the entire production run. Mills control the application rate of sizing chemicals or the thickness of extruded barrier films to maintain consistency against specified mill standards. Deviation from established limits creates risks of ink strike-through or adhesive delamination during secondary processing.
Uniform distribution of barrier chemistry ensures that the material meets the requirements for subsequent finishing operations without failure.