Polymer Barrier Coatings and Pulpability Test Standards
Polymer barrier paperboard compliance requires passing 0.15mm laboratory slot screening with under 15 percent reject mass to prevent EPR fee penalties.
EN 13430 Recycling
Material Evaluation
Packaging validation requires standardized methodologies to determine whether discarded fibre containers undergo successful material recovery. European standard EN 13430 Recycling establishes specific criteria for evaluating whether a used paper or board package is capable of being recycled into secondary raw material. This assessment procedure measures the proportion of packaging mass that transforms into usable pulp during repulping trials under controlled laboratory conditions.
The evaluation protocol simulates industrial paper mill pulping operations by subjecting flat board samples to mechanical agitation within aqueous solutions.
Repulping Yield
Laboratory testing measures the mass balance of material retained on standard screens after disintegration and the fraction passing through fine slots. High screening reject levels indicate poor fiber liberation or problematic barrier coatings that resist water penetration during the breakdown phase. Standard procedures require accurate recording of pulper yield percentages because low recovery rates disqualify the substrate from claiming recyclability under European regulations.
Board converters adjust wet strength resin additions and surface sizing applications to ensure sheets disintegrate within specified timeframes during repulping runs.
Process Limit
Industrial paper mills handle diverse waste streams containing mixed paper grades alongside printed folding boxboard and corrugated boxes. Adhesive residues and synthetic laminates present significant challenges during continuous pulping because sticky contaminants agglomerate and damage paper machine clothing. Packaging designers prevent processing failures by selecting water soluble adhesives and eliminating incompatible plastic windows that compromise secondary fibre quality.
Final acceptance depends entirely on whether the recovered pulp meets brightness and tensile strength benchmarks required for manufacturing new paper products.