For food-contact rPET packaging, PPWR recycled-content compliance and food-contact safety are separate conclusions supported by different evidence. Article 7 defines a recycled-content calculation by packaging type and format, averaged per manufacturing plant and year; its detailed EU calculation and verification method remains pending as of 17 September 2026. Safety depends on whether an identified mechanical PET recycling process reduces incidental contamination sufficiently and whether the finished article satisfies the applicable compositional, migration and use-condition requirements. The same recycled-content percentage can therefore describe packages with different safety evidence. This analysis is limited to post-consumer mechanically recycled PET in EU food-contact packaging and does not extend automatically to recycled PE, PP or other recycling technologies.

Two Compliance Questions Apply to the Same rPET Package

The PPWR and EU food-contact legislation evaluate different attributes of an rPET package.

Under Article 7 of Regulation (EU) 2025/40, the first-stage minimum for contact-sensitive packaging whose major component is PET is 30%, excluding single-use plastic beverage bottles, which have a separate 30% category. The requirement applies from 1 January 2030 or three years after the Article 7(8) implementing act enters into force, whichever is later.

This percentage is not necessarily the recycled content of every individual package. It is calculated for each plastic part, per packaging type and format, as an annual average for a manufacturing plant. It therefore answers a circularity and material-accounting question:

How much eligible post-consumer recycled plastic is incorporated within the PPWR calculation boundary?

Food-contact legislation asks another question:

Can the identified recycled material and finished package be used under the specified food-contact conditions without transferring constituents at unacceptable levels?

Regulation (EC) No 1935/2004 requires food-contact materials, under normal or foreseeable use, to avoid transferring constituents in quantities that could endanger health, unacceptably alter food composition or impair organoleptic characteristics.

The distinction is central to interpreting PPWR. A documented recycled-content percentage does not establish decontamination effectiveness, migration compliance or suitability for a particular food-contact condition.

ChemicalCell’s PPWR packaging-material framework is the parent page for the wider material system, including packaging functions, PFAS, recyclability and qualification. The present page addresses only the interface between Article 7 recycled-content accounting and food-contact safety for mechanically recycled PET.

Which PPWR Rules Are Fixed and Which Remain Pending?

Article 7 already fixes several important elements:

• the counted material must be recovered from post-consumer plastic waste;
• the calculation applies to each plastic part;
• the applicable packaging category is determined by type and format;
• the result is averaged per manufacturing plant and year;
• different minimum percentages apply to different packaging categories.

Detailed calculation and verification rules remain under development. The legal deadline, current procedural status and indicative planning date should be kept separate:

The European Commission’s official call for evidence covers recycled-content calculation and verification, recycling-technology sustainability criteria and third-country equivalence. The document describes Q4 2026 as indicative and states that its timing and content remain subject to change.

The Article 7(8) act is expected to define the detailed methodology and technical-documentation format. Issues under consideration include data flows, chain of custody, aggregation level, retained evidence and possible third-party verification.

This creates an important evidence boundary:

The post-consumer source and plant-year packaging calculation object are enacted requirements. A current company or certification method cannot yet be presented as equivalent to the final Article 7(8) calculation and verification method.

This status statement requires review when the Article 7(8) acts are adopted. The final legal text, rather than the present call for evidence, will determine the detailed calculation, allocation, verification and documentation rules.

ChemicalCell’s analysis of PPWR recycled-content claims and traceability addresses that accounting question in detail. The safety assessment described below remains a separate technical and regulatory task.

Why Mechanical rPET Requires a Material-Specific Assessment

Post-consumer PET is not treated as virgin PET merely because both materials have the same base polymer. Recycled feedstock may contain substances introduced during the package’s first use, consumer misuse, collection, sorting or waste handling.

Regulation (EU) 2022/1616 on recycled plastic food-contact materials defines “incidental contamination” as contamination originating from food, previous food-contact use, misuse for non-food purposes or the unintended presence of other substances and materials during waste management.

Its concept of a decontamination process is correspondingly specific: a defined sequence of operations intended to remove contamination from the plastic input and make it suitable for food contact.

For post-consumer mechanical PET recycling, the regulation establishes several boundaries that a recycled-content figure does not reveal:

• The input may contain no more than 5% of materials and articles previously used in contact with non-food materials or substances.
• The relevant mechanical PET recycling processes require individual authorization.
• Additional specifications may be attached to an individual process.
• The resulting recycled PET and final articles are not authorized for use in microwave or conventional ovens under this technology category.

These are process and use restrictions. They are not generic properties of “30% rPET” or “100% rPET.”

PET also has characteristics that shape its assessment framework. EFSA describes PET as having a relatively limited additive range and low diffusion of potential migrants into and from the polymer matrix. This supports a PET-specific challenge-test and migration-modelling approach. It does not justify transferring the same assumptions to recycled polyethylene or polypropylene, whose contaminant sorption, additive systems and diffusion behaviour differ.

From Feedstock Contamination to a Valid Safety Conclusion

The safety argument for post-consumer mechanical rPET follows a defined causal chain:

Post-consumer PET input → incidental contamination → decontamination process → residual contaminant concentration → potential migration → dietary exposure

Each link requires its own evidence.

1. Input Composition Defines the Contamination Problem

Sorting and washing remove foreign materials and surface residues. These steps do not independently demonstrate removal of substances absorbed into PET or present in less accessible contamination sites.

Input controls therefore define the waste stream that the assessed process is expected to handle. A compliant input specification supports the conclusion that feedstock falls within the process’s authorized scope. It does not prove that a particular batch contains no unknown contaminants.

2. A Challenge Test Measures Process Capability

EFSA’s 2024 guidance for post-consumer mechanical PET recycling processes evaluates decontamination using challenge tests. PET is intentionally contaminated with surrogate substances representing different molecular masses, polarities and volatilities, then processed through the critical decontamination steps.

For surrogate i, the measured decontamination efficiency is applied to EFSA’s reference contamination level:

Cres,i=3 mg/kg PET×(1−Ei100)C_{\mathrm{res},i} = 3\ \mathrm{mg/kg\ PET} \times \left(1-\frac{E_i}{100}\right)

where:

• Cres,i is the calculated residual concentration of surrogate i in recycled PET;
• Ei is the measured decontamination efficiency for that surrogate, expressed as a percentage;
• 3 mg/kg PET is EFSA’s reference contamination level for possible consumer misuse.

The 3 mg/kg value is a conservative evaluation input derived for this assessment framework. It is not a maximum contaminant specification for every incoming PET batch, an analytical reporting threshold or a universal limit for finished rPET.

3. Residual Concentration Is Compared with a Modelled Concentration

The calculated Cres,i is compared with Cmod,i, the concentration of the surrogate in PET that would produce a modelled migration compatible with EFSA’s dietary-exposure criterion.

EFSA uses a threshold of 0.0025 µg/kg body weight per day for unknown contaminants with potential genotoxic concern. Cmod is calculated through conservative migration modelling so that the corresponding dietary exposure does not exceed that threshold.

The comparison is:

Cres,i≤Cmod,iC_{\mathrm{res},i}\leq C_{\mathrm{mod},i}

When this relationship is satisfied for each surrogate, it supports the conclusion that the evaluated process can reduce the represented unknown contamination to a level that is not expected to raise a health concern under the defined conditions of use.

4. Cmod Depends on an Exposure and Migration Model

Cmod is not a universal concentration limit. EFSA calculates it from an exposure scenario and a defined set of conservative migration assumptions.

Where an applicant requests unrestricted food-contact use, EFSA applies its most conservative scenario for drinking water and infants. This scenario uses food or water consumption of 260 mL/kg body weight per day.

For this scenario, EFSA derives modelled migration criteria of:

• 0.0481 µg/kg food for surrogate substances with molecular mass at or below 150 Da;
• 0.0962 µg/kg food for surrogate substances above 150 Da.

These values incorporate factors intended to account for overestimation by the migration model. EFSA explicitly states that they are calculation criteria rather than general migration limits.

The corresponding Cmod calculations use the following model conditions:

These conditions define the evidence boundary of the calculated Cmod. They do not describe every commercial package. Their function is to create a conservative and reproducible process-assessment model.

EFSA also provides less conservative exposure scenarios for restricted food categories. A process that does not meet the unrestricted-use scenario may still be evaluated through an appropriately limited intended use, additional evidence or a lower rPET percentage. Such a conclusion must retain the corresponding recycled-content, food-category and use restrictions.

5. What the Comparison Can and Cannot Prove

A successful Cres-to-Cmod comparison supports the decontamination capability of the evaluated process under its defined operating parameters and intended use.

It does not prove that:

• every unknown contaminant has been analytically identified;
• the incoming feedstock contains no contamination above 3 mg/kg;
• the recycling process can operate outside the assessed parameter range;
• every installation applying the authorized process remains within the critical operating conditions;
• every converter using the resulting rPET produces an equivalent article;
• a finished package complies with every food-contact requirement;
• targeted and non-targeted migrants introduced during conversion have all been assessed.

The challenge test evaluates process capability through representative surrogate contaminants. It does not replace control of the actual recycling operation, installation-level compliance or evaluation of the converted food-contact article.

Why Recycled-Content Percentage Cannot Carry the Safety Conclusion

Two packages can both satisfy a 30% PPWR recycled-content requirement while relying on different:

• PET waste streams;
• decontamination processes and installations;
• operating conditions;
• recycled-resin batches;
• multilayer constructions;
• additives, colorants or conversion aids;
• food types and contact conditions.

The percentage contains none of this information.

Increasing the rPET percentage changes the proportion of material originating from the recycling process. The percentage alone still cannot predict migration. Migration depends on contaminant identity, residual concentration, diffusion behaviour, layer placement, article thickness, food chemistry, temperature and contact duration.

PPWR itself preserves this safety boundary. Article 7 excludes food-contact plastic packaging from the minimum recycled-content obligations where the recycled quantity would threaten human health and cause non-compliance with Regulation (EC) No 1935/2004.

This provision does not create a general exemption for food packaging. It establishes that a recycled-content target cannot override food-contact safety.

What Finished-Article Migration Testing Adds

Process authorization addresses the production of recycled plastic. The finished package can introduce additional variables through virgin-polymer blending, multilayer construction, printing, adhesives, colorants, additives, drying and thermal conversion.

Under Regulation (EU) No 10/2011, specific migration compliance is determined in food or appropriate food simulants. Testing must represent the intended food-contact surface and the most severe foreseeable combination of contact time and temperature for the declared uses.

A migration result therefore belongs to a defined test envelope:

• composition and construction of the test article;
• selected food or food simulant;
• surface-area-to-food or simulant ratio;
• contact duration;
• contact temperature;
• single-use or repeated-use conditions;
• analytical scope, method and reporting limit.

A compliant result can support migration compliance for the represented article, substances or analytical scope, and use conditions. It cannot automatically support a hotter application, longer storage period, different food type, thinner wall, higher recycled-content formulation or materially different layer structure.

The evidence hierarchy also matters. Results obtained in food take precedence over results from food simulants. Food-simulant results take precedence over screening calculations. A failed screening result must be confirmed through the applicable verification procedure before non-compliance is concluded.

Migration testing has its own boundary. A targeted test confirms only the substances included in the analytical scope. Overall migration is not an inventory of individual migrants, and a compliant overall-migration result does not prove that every non-intentionally added substance has been identified or assessed.

Migration compliance is also narrower than complete food-contact compliance. Depending on the article and regulatory route, the final compliance conclusion may additionally require confirmation of authorized substances and applicable restrictions, NIAS risk assessment, good manufacturing practice, declaration-of-compliance information, traceability and the requirements attached to the recycled-plastic process and intended use.

ChemicalCell’s reference on cross-checking NIAS, odor and migration data addresses that narrower analytical task. It explains why those evidence streams must represent the same material, processing stage, package configuration and intended use before their conclusions can be combined.

How the Evidence Can Be Combined Without Overclaiming

The following evidence architecture is a technical synthesis for review and qualification. It is not a single statutory checklist named in the PPWR. Each step has a different regulatory status, and the combined conclusion is only as strong as the weakest unresolved link.

The distinction between process authorization and installation-level evidence is important. Authorization establishes the assessed process and its restrictions. It does not by itself demonstrate that every installation, production run or delivered batch remained within the critical parameters. That connection depends on process identity, installation records, feedstock controls, operating data and the applicable declarations or compliance documentation.

A break in the evidence chain limits the available conclusion.

For example, a migration report with no connection to the resin source or package construction may describe a technically similar sample without demonstrating the marketed article. Conversely, a complete recycled-content mass balance can verify a percentage within its stated methodology while providing no evidence about decontamination or migration.

The relationship can be summarized as:

PPWR accounting identifies how much eligible recycled plastic is counted within the applicable accounting boundary.
Process evaluation and operating evidence address whether an identified mechanical PET recycling process and installation control incidental contamination for specified uses.
Finished-article testing supports defined migration or analytical conclusions for the represented package and contact conditions.

These conclusions remain separate. Full food-contact compliance may require additional compositional, NIAS, GMP, declaration and traceability evidence beyond a migration result.

Where This Framework Stops Applying

The conclusions on challenge testing, reference contamination and Cres-to-Cmod comparison apply to post-consumer mechanical PET assessed within EFSA’s framework. They should not be transferred without separate evidence to:

• mechanically recycled PE, PP or polystyrene;
• recycled plastic manufactured through another suitable or novel technology;
• chemically recycled feedstocks entering a different regulatory route;
• recycled material used behind a functional barrier;
• closed and controlled product-loop recycling schemes;
• microwave or conventional-oven applications;
• package configurations or use conditions outside an authorized process or migration-test scope.

Multilayer packaging also requires layer-specific interpretation. A barrier may reduce migration from an inner recycled layer under defined conditions. Barrier effectiveness depends on material, thickness, migrant properties, time, temperature and package integrity. The presence of a barrier alone does not establish negligible migration.

Defensible Conclusion

PPWR recycled-content compliance and rPET food-contact safety must be demonstrated independently and then connected to the same package.

Article 7 evidence can establish the eligible post-consumer recycled percentage within its packaging-type, format, plant and annual boundary. Article 7(8) sets 31 December 2026 as the deadline for adoption of the detailed calculation and verification acts. As of 17 September 2026, those acts remain pending, and methods that depend on their future provisions cannot yet be represented as final-method compliance.

An authorized mechanical PET recycling process, supported by challenge-test evidence and installation-level operating control, can establish decontamination capability under defined input, process, exposure and intended-use conditions. The Cres-to-Cmod comparison is valid only within the EFSA assessment framework and its stated modelling assumptions.

Finished-article migration evidence can support migration compliance for the represented construction, analytical scope and foreseeable food-contact conditions. It does not by itself establish complete chemical characterization or full food-contact compliance where other compositional, NIAS, GMP, documentation or traceability requirements apply.

None of these conclusions substitutes for the others. The technically defensible conclusion is limited to the packaging configuration, recycled-content accounting boundary, recycling process, operating installation, manufacturing chain, analytical scope and intended use covered by the combined evidence.