PPWR & Composite Can Converters: Spiral-Wound Paper, Metal Ends & Multi-Material Grading

PPWR & Composite Can Converters: Spiral-Wound Paper, Metal Ends, Foil Liners and the Multi-Material Grading Problem

Composite cans — the spiral-wound paperboard cylinders sealed with a metal or fibre end and topped by a plastic overcap — sit on the shelves of every European supermarket as Pringles canisters, infant formula tins, ground-coffee tubs, oat boxes, juice-powder canisters, breadcrumb tubes, motor-oil bottles and biscuit barrels. Their economics are excellent (low tare weight, sturdy stacking, premium shelf appeal) but their PPWR position is uncomfortable. A composite can is a hybrid by construction — roughly 70 % paperboard, 10–15 % steel or aluminium, 5–10 % plastic overcap and a polymer or aluminium liner inside the body — and Regulation (EU) 2025/40 demands a single Annex II recyclability grade for that whole packaging unit. Composite can converters (Sonoco, Smurfit Kappa Composites, Massilly, Glud & Marstrand, Sealed Air, Crown Speciality Packaging, M&Q Plastic Products and dozens of regional players) face the same question every carton plant and every can maker faces — but with a stack that none of those single-stream protocols cleanly cover.

This guide is the converter-side playbook: how Article 6 grading actually lands on the composite-can stack, which components are the grade-killers, how the March 2026 European Commission guidance shifts the playing field, and what an operator must change between now and August 12, 2026.

What PPWR Actually Says About Composite Packaging

Under Article 6 of Regulation (EU) 2025/40 every packaging unit must receive a recyclability performance grade — A (highly recyclable, ≥ 95 %), B (recyclable, ≥ 80 %) or C (recyclable, ≥ 70 %) — derived from Annex II Table 3. Below-Grade-C packaging is banned from the EU market on January 1, 2030; Grade C becomes the floor on January 1, 2038 (only A and B survive). Article 6(2) is explicit that grading is performed per packaging unit, including all its components, on the basis of the predominant material weight when more than one material is involved — provided the minor materials remain compatible with the dominant recycling stream or can be reliably separated at the sorting plant. That last clause is the entire compliance question for a composite can: are the metal end, the foil liner, the inner overcap and the printed label compatible with the paper recycling stream, or do they need to be separated?

Article 7 then layers a recycled-content trajectory on the plastic components (5 % for contact-sensitive non-PET from January 1, 2030 with the mass-balance pathway permitted under Article 7(7)). Article 10 demands minimisation. Article 12 requires a Digital Product Passport from August 28, 2027. Article 39 plus Annex VIII demand a Declaration of Conformity per SKU. The economic operator who places the can on the market is the brand owner, but every line of the DoC traces back to data the composite-can converter must collect and publish.

The Composite Can Stack — Component by Component

Why a Composite Can Defaults to Grade C or Lower

Run a standard composite can through the CEPI Recyclability Laboratory Test Method or the 4evergreen Recyclability Evaluation Protocol and the result is rarely better than grade C. The repulper produces a clean fibre yield from the wound body — that part is straightforward — but the aluminium-foil liner shreds into millimetre-scale flakes that report as reject, the PE inner ply melts onto felts, and the steel bottom either floats or sinks depending on the mill's separation kit. Yields drop below the 80 % fibre-recovery threshold and the construction loses its grade-B claim. Worst case, a foil-lined coffee canister with a PE overcap and a snap-on aluminium bottom finishes the protocol below grade C and faces removal from the EU market on January 1, 2030.

The good news is that almost every grade-killer has a credible replacement on the market today. The bad news is that converting a high-speed composite can line away from foil-liner stock and toward a SiOx-coated mono-fibre body requires a 12–18 month qualification cycle on the brand-owner side — and the August 12, 2026 deadline for Declarations of Conformity is less than three months away.

The Five Grade-Killers on a Composite Can

The March 2026 EC Guidance and What It Did Not Settle

On March 27, 2026 the European Commission published its first omnibus guidance document on PPWR application alongside an FAQ. The package is welcome — it clarifies the methodology for Article 11 labelling, the relationship between Article 6 grading and existing Member State EPR eco-modulation, and the treatment of intentionally-added PFAS under Article 5 — but composite multi-material packaging was not addressed in depth. The Commission has confirmed that delegated acts on Article 6 design-for-recycling criteria are due by January 1, 2028, with an interim implementing act on material identification methodology due by August 12, 2026. Until those acts land, composite-can converters must use the best industry protocols available: 4evergreen Recyclability Evaluation Protocol v2.0 for the fibre body, EN 13430 for the metal end, and RecyClass design-for-recycling guidelines for the plastic overcap, then assemble a defensible weighted average. Article 39 Declarations of Conformity dated after August 12, 2026 will be inspected by Member State authorities even before the delegated act is in force — and an undocumented grade claim is a deficient DoC.

The Article 7 Recycled-Content Problem on Composite Cans

Article 7 sets recycled-content targets only on the plastic share of a packaging unit; the paperboard body is governed by the broader Article 6 and Member State fibre-recovery loops, not by 7's percentages. For a typical Pringles-style canister, the plastic share is the overcap (3–6 g of PE or PP) and any plastic-coated easy-peel membrane. From January 1, 2030, contact-sensitive packaging made of plastics other than PET must contain at least 5 % recycled content; from January 1, 2040 the target rises to 25 %. The simplest route on a PE or PP overcap is an ISCC PLUS mass-balance certificate from the polymer supplier (SABIC TRUCIRCLE, LyondellBasell CirculenRevive, Borealis Bornewables, TotalEnergies RE:clic). Because the overcap is small (3–6 g), the absolute recycled tonnage is modest, but the cost premium can be meaningful and the document trail must survive an audit. Converters should lock supply contracts now and ensure the per-batch ISCC PLUS attestations reach the brand owner with each delivery.

Easy-Open Membranes, Foil Pull-Tabs and the "Detachable" Argument

Many composite cans are sealed by an aluminium-laminated peel-off membrane under the overcap. This membrane is intended to be removed by the consumer at first opening and discarded — typically into the household plastic / mixed-light-packaging bin. The PPWR question is whether the membrane counts toward the can's recyclability grade. The honest answer under the 4evergreen REP v2.0 protocol is: yes, the membrane is part of the packaging unit until the consumer separates it; the assessment must therefore be made on the as-placed-on-market unit. Some converters argue the membrane is functionally a closure (Article 6(4)) and not subject to body grading. The Commission has not confirmed this reading. The safer operator position is to assume the membrane is in scope, validate a high-barrier paper or SiOx-coated alternative, and reserve aluminium-laminate membranes for high-shelf-life products where no fibre-only alternative meets the oxygen-transmission specification.

The Article 24 E-Commerce Empty-Space Trap

Many composite cans ship through e-commerce in oversized corrugated outers. Article 24 caps empty space in e-commerce parcels at 50 % (with the recent March 2026 guidance signalling Commission favour for a tighter 40 % interpretation in many cases). Composite cans are awkward shapes — cylinders nest poorly in cubic corrugated cases — and the void typically runs above 30 % even in well-designed transit packaging. Converters who sell composite cans to brand owners with strong e-commerce channels (snack, infant formula, supplement, ground-coffee) should be prepared to provide nesting diagrams, recommended secondary case sizes and right-sizing guidance as part of the commercial offer. The data sheet matters as much as the press capability.

The Data Handoff: What Brand Owners Will Demand

As of August 12, 2026, every brand-owner Declaration of Conformity under Annex VIII must be traceable to its supplier's data. For composite-can converters, that means a structured, machine-readable specification sheet per SKU containing at least:

• Body construction: ply count, grammage per ply (g/m²), recycled vs virgin fibre share, fibre origin (FSC / PEFC)
• Inner liner chemistry (aluminium foil, PE, EVOH, SiOx, AlOx), thickness or coat weight, oxygen and water-vapour transmission rate
• Spiral-winding adhesive chemistry, dosage per metre, INGEDE Method 12 stickies classification
• Bottom end material (tinplate, aluminium, paper, fibre composite), thickness, mass, attachment method (rim seam, glue-bonded)
• Overcap material (HDPE, PP, aluminium), mass, NIR pigment status, ISCC PLUS mass-balance rPE / rPP percentage
• Easy-open membrane chemistry (if present), mass, recyclability route
• Label or direct-print specification: coverage percentage, ink chemistry, varnish coat weight, INGEDE Method 11 deinkability rating
• 4evergreen REP v2.0 test report with predicted grade; per-component Annex II weighted average
• Article 5 evidence: zero intentionally-added PFAS, heavy-metal sum below 100 mg/kg per Annex V
• Article 12 data block: sorting pictogram, material code, DPP-ready structured data

Converters who publish this back to procurement as a structured data export — not a scanned PDF — will keep their job book. Sonoco, Smurfit Kappa Composites and Massilly have all begun signalling PPWR data-portal programmes on the supplier side. The commercial direction is unmistakable: data maturity is becoming as important as the spiral-winding mandrel itself.

Action Plan for Composite Can Converters

• Map every active SKU against the Annex II grading risk — segment by liner type (aluminium foil vs SiOx vs EVOH vs PE extrusion), bottom end (metal vs fibre disc), overcap material and label coverage. Tag the borderline references for migration.
• Pilot a SiOx- or AlOx-coated mono-fibre liner — qualify Stora Enso, Metsä Board or Mondi barrier-paper stock on at least one snack and one dry-goods reference; archive the oxygen- and water-vapour transmission rates with the brand-owner specification.
• Migrate the spiral-winding adhesive — drop solvent-based and PVdC-containing adhesives in favour of alkali-dispersible PVA or starch hot-melts; book INGEDE Method 12 stickies tests per reference.
• Eliminate PFAS at the molecule level— audit any greaseproof barrier (snack canisters especially) for fluorotelomer treatments; collect supplier declarations to the molecule and archive total-fluorine test results (50 ppm threshold).
• Lock ISCC PLUS rPE / rPP supply for overcaps — the volumes are small but the documentation chain must be airtight; build a per-batch attestation flow from polymer supplier to brand-owner DoC.
• Offer paper- or fibre-disc bottoms as a default— the Pringles 2023 EU paper-bottom launch is now Sonoco's reference platform; new commercial pitches should lead with the fibre-bottom variant and reserve metal ends for genuinely barrier-critical references.
• Stand up a structured DoC / DPP data pipeline — every SKU needs a machine-readable spec sheet per Article 39 / Annex VIII; PDFs will not scale past a few hundred references and will not survive an Article 12 DPP query in August 2027.

How PPWR Connect Helps Composite Can Converters

Composite cans are the textbook case of the multi-material grading problem at the heart of PPWR Article 6: a single packaging unit composed of fibre, metal, plastic and adhesive, each routed to a different recycling loop, all assessed against one weighted grade. PPWR Connect gives spiral-wound composite-can converters and their brand-owner customers a single platform to inventory every active construction, run automated Annex II grading on the full body + liner + end + overcap + label stack, intake 4evergreen REP v2.0 / CEPI / EN 13430 test reports, track ISCC PLUS mass-balance recycled-content evidence on the plastic overcap, model Article 24 e-commerce void-volume scenarios for nested cylindrical formats, and produce audit-ready Declarations of Conformity per market. Converters use the same platform to publish machine-readable component specifications back to their brand-owner customers — turning PPWR compliance from a reporting burden into a tender-winning differentiator. With August 12, 2026 less than three months away, composite-can converters who start structured data collection and barrier-paper qualification today are the ones who will keep their snack, infant formula and ground-coffee accounts into 2030.