Rigid Plastics & Thermoforming — Regulatory & Compliance Guide

Overview #

Navigating the regulatory landscape for thermoformed rigid plastic packaging is one of the most common bottlenecks we see when brand partners bring a new product to market across multiple regions. The core challenge is not any single market’s rules — it is that the US, EU, and China each have structurally different frameworks, and a tray, clamshell, or blister pack that clears FDA 21 CFR review may still require additional migration testing or resin documentation before it ships legally into the EU or mainland China. This guide focuses on food-contact and consumer-goods thermoforming compliance, and is most relevant to brands selling chilled food, nutraceuticals, cosmetics, medical devices, or electronics accessories in two or more of these markets. The single most important insight from our production team: specifying resin grade at the purchase order stage — not just “food-grade PET” — is the only way to guarantee your compliance documentation is complete before first shipment.

Regulatory Frameworks by Market: EU, US, and China #

The three major destination markets for our OEM thermoformed packaging each require different documentation, and the gap between them is wider than most brand buyers expect.

In the EU, food-contact plastics are governed by EU Regulation 10/2011 (Plastics Implementation Measure, PIM), which requires a Declaration of Compliance (DoC) and supporting migration test data. Overall migration limits are set at 10 mg/dm², with a specific migration limit (SML) for regulated substances listed in Annex I. From January 2023, the EU also enforces PPWR (Packaging and Packaging Waste Regulation) requirements on recycled content traceability and recyclability labelling, and thermoformed PET trays entering the EU market must meet minimum 30% recycled content targets under the current proposal timeline (to be mandatory by 2030 under PPWR Article 7). Any colorant or additive not listed in EU 10/2011 Annex I or Annex II is not permitted in food-contact layers.

In the US, the primary framework is FDA 21 CFR Parts 170–189, with Part 177 specifically covering polymers used in food-contact articles. PET falls under 21 CFR 177.1630, PP under 177.1520, and PS under 177.1640. Unlike the EU’s positive list approach, the US system allows for food-contact notification (FCN) and generally recognised as safe (GRAS) pathways, which gives more flexibility but also shifts documentation burden to the manufacturer. Our US-bound trays are produced with resin suppliers who provide a 21 CFR Letter of Conformance (LoC) for each lot — this is the document your customs broker and retailer compliance team will ask for first.

In China, food-contact thermoformed plastics fall under GB 4806.7-2016 (national food safety standard for plastic materials and articles) and the associated positive substance list under GB 9685-2016. China’s framework most closely resembles the EU model — both operate from a positive list — but the substance lists do not overlap completely, so a resin that clears EU 10/2011 still needs to be checked against GB 4806.7 before we can certify it for the Chinese market. Additionally, CNCA (Certification and Accreditation Administration) registration is required for imported food-contact packaging since 2022.

Material-Specific Compliance Requirements for PET, PP, and PS #

Compliance obligations are not the same across all thermoforming resins — and this is where many briefs we receive underspecify the requirement.

PET (0.25–0.50mm sheet, food-contact grade): PET for food contact must use virgin or certified rPET resin with acetaldehyde content controlled below 1 ppm for direct food contact (relevant particularly for lidding and tray applications with fatty or acidic food simulants). Under EU 10/2011, PET trays must pass migration testing against simulants A (aqueous, pH > 4.5), B (acidic, pH ≤ 4.5), C (alcoholic), and D1 (fatty food simulant). Test temperature and duration are defined by the intended use condition — for chilled storage at 5°C, testing at 40°C for 10 days is standard per EU 10/2011 Table 3.

PP (0.30–0.80mm sheet, food-contact grade): PP is our most specified resin for microwave-safe trays. It must meet 21 CFR 177.1520 for US market and GB 4806.7-2016 for China. PP’s higher processing temperature (200–270°C melt range in our sheet extrusion line) means we have tighter controls on anti-oxidant additive migration — we specify Irganox 1010 or equivalent at ≤0.1% loading, confirmed by supplier lot certification.

PS (0.20–0.60mm sheet, thermoformed blister): Polystyrene presents the most complex compliance profile. Residual styrene monomer must be ≤100 ppm under EU 10/2011 Annex I (Substance No. 757). GPPS is not suitable for fatty food contact — only HIPS with appropriate additives can be used, and only with documented migration data. For our US-bound electronics blister packs, PS is used freely since food contact is not a factor, but REACH Regulation (EC) 1907/2006 still applies for any substance of very high concern (SVHC) present above 0.1% w/w in the finished article.

Quality Control and Documentation Standards in Production #

Our compliance work does not end at resin selection — it runs through our production quality system and is documented at every stage.

We operate thermoforming lines qualified to ISO 9001:2015 QMS, and for pharmaceutical blister applications we apply GMP principles aligned with EU GMP Annex 11 and 21 CFR Part 211 where requested by our pharma-sector brand partners. Inline thickness measurement using contact gauges is run at ±0.02mm tolerance on wall thickness — any deviation beyond this threshold triggers a hold and root-cause review before the batch progresses to trim and stack.

For food-contact certification packages, our standard documentation set includes: resin supplier lot CoA, 21 CFR LoC (US shipments), EU DoC with migration test reference numbers, GB 4806.7 test report (China shipments), and our internal REACH SVHC declaration. We compile this as a single compliance dossier per SKU, updated annually or when resin supplier changes. AQL inspection level for thermoformed food trays follows ANSI/ASQ Z1.4, Level II, with critical defect (contamination, seal integrity failure) at AQL 0.65 and major defect (dimensional non-conformance >0.5mm) at AQL 1.0.

For brands requiring FSC chain-of-custody on any paperboard component in a composite tray pack, we hold FSC-CoC certification and can extend it to mixed-material packs where the paperboard component is ≥50% of the total packaging weight.

Transport testing for thermoformed trays destined for e-commerce fulfilment follows ISTA 2A protocol, which we validate with our third-party test lab partner — typical cycle includes 60-minute random vibration at 0.52 Grms and 1.0m drop testing in six orientations.

Specification Notes for Brand Partners #

When you brief us on a thermoformed packaging project, the first things we need to confirm are the destination markets, the product category (food/non-food, direct contact or indirect), and the resin you are specifying — or whether you need us to recommend one. The most common brief mistake we see is specifying “food-grade PET” without identifying whether the product is fatty, acidic, or aqueous, because this determines which EU 10/2011 simulants apply and whether a standard migration test report covers your use case or a custom test is needed.

Once we have the full brief, our typical process is: resin and tooling specification review in 3–5 working days, physical prototype samples in 10–15 working days, and production lead time of 20–30 working days after your written sample approval. For projects requiring new migration testing (rather than drawing on existing data from our approved resin library), allow an additional 15–20 working days for third-party lab turnaround. We recommend starting compliance documentation in parallel with tooling — do not wait for first samples to begin the DoC or 21 CFR LoC process, or you will add 3–4 weeks to your market-entry timeline.

Frequently Asked Questions #

Q1: What overall migration limit applies to your thermoformed food trays for the EU market?
A: EU Regulation 10/2011 sets an overall migration limit of 10 mg/dm² for food-contact plastics — this is the threshold our compliance documentation and third-party migration test reports are validated against. Specific migration limits (SMLs) for individual listed substances are set separately in Annex I and must be checked substance by substance for each resin formulation we use.

Q2: What is your standard production lead time for a new thermoformed tray SKU, and does compliance documentation add to that?
A: Our standard production lead time is 20–30 working days after sample approval. If your project can draw on existing migration test data in our approved resin library, compliance documentation does not add to that timeline — we compile the full dossier in parallel. For projects requiring new third-party migration testing, allow an additional 15–20 working days for lab turnaround, so plan ahead if you have a hard market-entry date.

Q3: Does REACH apply to thermoformed plastic packaging even if it is not food-contact?
A: Yes — REACH Regulation (EC) 1907/2006 applies to all articles, including non-food thermoformed packaging such as electronics blisters and cosmetics clamshells. Any SVHC present above 0.1% w/w in the finished article triggers communication obligations down the supply chain. We provide a REACH SVHC declaration as standard in our compliance dossier for every SKU.

Q4: Can you produce thermoformed trays that meet both EU 10/2011 and China GB 4806.7-2016 simultaneously?
A: Yes, we regularly produce dual-compliant trays for brand partners selling in both regions. The key requirement is that the resin formulation and all additives appear on both the EU Annex I/II positive list and the China GB 9685-2016 substance list — these do not overlap completely, so we run a cross-check at the specification stage. The overall migration limit of 10 mg/dm² is the same in both frameworks, which simplifies test scope.

Q5: What is the most common quality defect you see in thermoformed food trays, and how do you control it?
A: The most common issue is wall thickness variation outside the ±0.02mm tolerance we hold on our production lines, usually caused by sheet temperature non-uniformity before forming. In our experience, this is most likely on deep-draw trays with a draw ratio above 1:1.5 — we control it through zone-by-zone infrared heater calibration before each production run and inline contact gauge measurement at three positions across the sheet width. Trays outside tolerance are quarantined before trimming and do not enter the finished goods stream.

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