PCR resin: definition, sourcing and compliance

PCR vs PIR: why the distinction is not pedantic

Post-industrial resin is offcuts, purge and rejects from a manufacturing plant. It is clean, single-polymer and consistent, which makes it attractive technically — but it was always going to be reprocessed, so using it diverts nothing from waste and creates no new environmental benefit. Regulators know this, which is why PIR is excluded or discounted in most recycled-content definitions.

Post-consumer resin comes from products that were used and thrown away. It is harder to collect, more variable and more expensive to process — and it is the only category that demonstrably diverts material from landfill or incineration. If a supplier quotes 'recycled content' without specifying which, assume PIR until proven otherwise and ask directly.

What PCR grades are actually available

Availability and price vary sharply by polymer. rPET is mature, food-grade capable and tight on supply because of bottle-to-bottle demand. rHDPE is well established from rigid packaging. rPP has grown quickly but quality varies with the source. rLDPE is constrained by film collection, so quality depends heavily on whether the stream is industrial or kerbside.

Mixed polyolefins fill the volume end of the market. Streams recovered from a single, standardised product design — such as the polyethylene-aluminium fraction from post-consumer packaging — behave more consistently than mixed kerbside plastics, because the composition is set by the packaging design rather than by consumer sorting behaviour.

The regulatory picture in Europe

The Packaging and Packaging Waste Regulation sets binding recycled-content targets for plastic packaging placed on the EU market, escalating through the next decade. Single-Use Plastics Directive obligations already apply to PET beverage bottles. Alongside these, CSRD and ESRS E1 require in-scope companies to report Scope 3 emissions, of which purchased materials is typically the largest category.

The practical consequence is that PCR content is becoming an audited figure in a financial-grade report rather than a claim on packaging. That raises the documentary bar for suppliers considerably, and it is why traceability paperwork has become as important as the material specification itself.

How PCR lands in your Scope 3 numbers

Purchased materials sit in Scope 3 category 1. Substituting virgin polyolefin with PCR polyolefin cuts the emission factor applied to that tonnage — for polyolefins, from roughly 1.8–2.0 t CO₂e per tonne down to around 0.3, a saving near 1.5 t per tonne.

Critically, that reduction propagates. Your Scope 3 saving becomes your customer's Scope 3 saving on the components they buy from you, and their customer's after that. For anyone selling into consumer brands with public decarbonisation targets, documented PCR content is a commercial argument, not just a compliance cost.

Specifying PCR without getting caught out

Write the PCR percentage into the purchase specification, not the marketing brief, and require it stated on the certificate of analysis per batch. Specify whether mass-balance allocation is acceptable or whether you require physically segregated material — the two are treated very differently by some certification schemes and by some customers.

Then validate the processing side properly: run a trial on the real tool, confirm MFI and shrinkage, and agree a tolerance band that the supplier is contractually held to. A PCR grade that meets your sustainability target but scraps 8% of production is not cheaper.

• State PCR % in the purchase spec and on every certificate of analysis.
• Decide explicitly: mass balance or physically segregated.
• Require origin traceability documentation, not a self-declared claim.
• Agree an MFI and ash tolerance band, contractually.
• Request a product carbon footprint to a recognised method for reporting.