Recyclability Verification
Standardized laboratory testing protocols evaluate the physical capability of coated, treated or laminated paperboard to disintegrate into individual usable wood fibres within conventional paper mill hydropulpers. Packaging converters obtain repulpability certification to substantiate that packaging structures release high quality cellulose pulp without clogging screening machinery or contaminating recycling streams. Standardized test methods simulate commercial pulping conditions by agitating sample packaging in water under controlled temperature, chemical and shear parameters.
The percentage of recovered fibre passing through standard screening plates determines whether the material passes compliance criteria. The protocol evaluates mechanical fibre liberation and stops short of assessing chemical compostability or anaerobic biodegradability.
Pulping Protocol
Testing laboratories disintegrate coated paper samples inside standardized British disintegrators or laboratory scale hydropulpers under defined mechanical shear. Achieving repulpability certification requires agitating the substrate in water at specified temperatures for an exact cycle count to liberate cellulose fibres from synthetic films and water resistant coatings. The resulting slurry passes through mechanical screens with fine slot openings to separate clean pulp from non repulpable rejects, plastics and agglomerated stickies.
Yield calculations weigh the dry rejected fraction against the initial substrate weight to establish total fibre recovery percentage. Coatings that break down into microscopic non tacky fragments pass cleanly through screening systems.
Market Adoption
Retail brands and packaging manufacturers demand third party test verification to eliminate landfill disposal and meet circular packaging targets. Obtaining repulpability certification confirms that barrier treated cups, frozen food cartons and paper pouches integrate safely into standard paper recycling mills. Substrates failing these pulping trials generate high screening waste and adhesive stickies that deposit on paper machine felts.
Passing substrates enter circular recovered fibre streams without disrupting conventional mill operations. Certification documentation provides vital compliance proof for commercial packaging designs.
