Testing Standard
European laboratory testing protocols evaluate the repulpability and fiber yield of paperboard packaging materials during standard recycling operations. The PTS RH 021 97 recyclability standard assesses whether functional coatings and adhesives interfere with pulp disintegration and screening processes. This testing method governs recyclability certification for paperboard products marketed across European consumer goods sectors.
It stops applying to non-paper packaging substrates made entirely from synthetic polymers or glass.
Pulping Yield
Recyclable paperboard packaging must defiber efficiently in standard hydrapulpers without generating tacky agglomerates or un-dispersed film fragments. Compliance with PTS RH 021 97 recyclability testing requires measuring usable fiber recovery percentages after standardized disintegration and screening stages. Large un-pulped film fragments or insoluble adhesive particles clog mill screening equipment and contaminate finished recycled paper webs.
Passing the standard confirms that packaging materials yield high proportions of clean fiber without requiring specialized chemical pulping treatments. Package designers utilize this laboratory protocol to test new barrier formulations before commercial launch.
Barrier Coating
Heavy plastic coatings and insoluble synthetic barriers prevent water penetration during repulping, reducing fiber recovery rates. Failing PTS RH 021 97 recyclability criteria occurs when barrier layers remain intact as large sheets, trapping valuable paperboard fibers inside. Water-dispersible or repulpable barrier polymers allow complete fiber liberation during standard recycling cycles.
