Why Food-Grade Compliance Matters
Every plastic component that touches food — from conveyor belts to packaging films — must comply with legally binding safety standards. Failure to meet these requirements can result in product recalls, regulatory fines, and serious liability exposure. This guide covers the two dominant regulatory frameworks: FDA 21 CFR in the United States and EU Regulation 10/2011 in the European Union, along with practical guidance on material selection, migration testing, and supplier documentation.
Regulatory Frameworks: FDA 21 CFR vs. EU 10/2011
Die FDA 21 CFR (Title 21 of the Code of Federal Regulations) governs food contact substances in the United States. Key sections include 21 CFR 175 (adhesives and coatings), 21 CFR 177 (polymers), and 21 CFR 178 (adjuvants and production aids). The FDA maintains a positive list of approved substances and operates a Food Contact Notification (FCN) program for new materials.
EU Regulation 10/2011 on plastic materials and articles intended to come into contact with food establishes a harmonized framework across EU member states. It defines an overall migration limit (OML) of 10 mg/dm², specific migration limits (SMLs) for individual substances, and a Union List of authorized monomers, additives, and polymer production aids. Compliance is demonstrated through migration testing under standardized conditions simulating actual use.
The two systems differ in philosophy: the FDA focuses on the safety of the finished article, while the EU emphasizes compositional compliance — every substance used in manufacturing must be on an approved list.
Approved Plastics for Food Contact
The following table summarizes commonly used food-grade engineering plastics, their maximum service temperatures, and typical applications in food processing and packaging:
| Material | Max Temp (°C) | Typical Food Contact Uses |
|---|---|---|
| PP (Polypropylen) | 100 | Packaging films, containers, caps, microwave-safe ware |
| HDPE (Hochdichtes Polyethylen) | 90 | Milk jugs, cutting boards, food storage bins, piping |
| PET (Polyethylene Terephthalate) | 70 | Beverage bottles, clamshell packaging, oven-safe trays |
| PA6 / PA66 (Nylon) | 120-150 | Conveyor components, meat processing parts, gears, bushings |
| POM (Acetal / Delrin) | 100 | Filling machine parts, valve seats, coffee machine components |
| PPSU (Polyphenylsulfone) | 180 | Baby bottles, medical and food service trays, hot-fill applications |
| PEEK (Polyether Ether Ketone) | 260 | High-temperature processing, bakery ovens, sterilization equipment |
Material selection is not simply about chemical composition. The grade must be specifically formulated for food contact, using only authorized additives at permitted concentrations. An industrial-grade PA6, for example, may contain lubricants or heat stabilizers not permitted under EU 10/2011 or FDA 21 CFR.
Migration Testing: Measuring What Transfers
Migration testing quantifies the amount of substances that transfer from the plastic into food or food simulants under controlled conditions. The overall migration limit of 10 mg/dm² (approximately 60 mg/kg of food) applies across both FDA and EU frameworks, though test conditions differ.
EU 10/2011 specifies food simulants based on food type:
| Simulant | Represents | Beispiele |
|---|---|---|
| Simulant A: 10% Ethanol | Aqueous foods | Water, beverages, soups |
| Simulant B: 3% Acetic Acid | Acidic foods (pH < 4.5) | Vinegar, citrus juices, pickles |
| Simulant C: 20% Ethanol | Alcoholic foods (up to 20%) | Wine, beer, sauces with alcohol |
| Simulant D1: 50% Ethanol | Fatty foods (alternative) | Oils, butter, fried foods |
| Simulant D2: Vegetable Oil | Fatty foods (reference) | Cooking oils, fatty meat, cheese |
| Simulant E: Tenax (MPPO) | Dry foods | Flour, cereals, dried fruit |
Specific migration limits (SMLs) apply to individual substances. For example, primary aromatic amines (PAAs) — potential degradation products from polyurethane and certain colorants — are restricted to a detection limit of 0.01 mg/kg. Each substance on the Union List has its own SML, and compliance must be demonstrated for every authorized substance present in the material.
“Food Grade” Means Full Supply Chain Compliance
A common misconception is that “food grade” is a property of the raw material alone. In reality, food-grade compliance spans the entire supply chain:
- Raw material production: The polymer resin must be manufactured using only authorized monomers and additives listed in the applicable positive list.
- Compounding and coloring: Any masterbatch, pigment, or filler introduced during compounding must itself be food-contact approved. A non-compliant colorant can invalidate the entire batch.
- Processing and machining: Contamination risks arise from mold release agents, cutting fluids, and lubricants used during fabrication. Dedicated food-grade production lines or thorough cleaning protocols are essential.
- Storage and transport: Finished parts must be stored and shipped in conditions that prevent contamination from dust, chemicals, or cross-contact with non-food-grade products.
- End-use conditions: The manufacturer’s declaration of compliance is valid only for the tested conditions — if a part is used at higher temperature or with more aggressive foods than tested, compliance may be voided.
Supplier documentation must demonstrate traceability at every stage. A Declaration of Compliance (DoC) under EU 10/2011 requires identifying the material, confirming migration test results, and specifying any restrictions on use.
NSF Certification: An Additional Layer
NSF International (formerly the National Sanitation Foundation) provides third-party certification for materials used in commercial food equipment. NSF/ANSI Standard 51 covers plastic materials and components used in food zone applications. Certification involves:
- Formulation review against the NSF-approved ingredient list
- Migration testing under NSF-specified conditions
- Annual unannounced facility audits to verify ongoing compliance
NSF certification is not a substitute for FDA or EU compliance — it is an additional, voluntary certification commonly required by equipment manufacturers and end users in North American food service. Many global food equipment brands require NSF-listed materials as a procurement condition.
Common Compliance Mistakes
Experience shows several recurring errors in food-grade plastics sourcing and specification:
- Using recycled material without certification: Post-consumer recycled (PCR) plastics require a formal FDA Letter of No Objection or EFSA opinion confirming the recycling process produces food-grade material. Uncertified recycled content is not food-contact compliant, regardless of the original material grade.
- Wrong or undocumented additives: Heat stabilizers, UV stabilizers, nucleating agents, and processing aids must all be food-contact approved. Using an industrial-grade additive instead of its food-grade counterpart is one of the most frequent causes of compliance failure.
- Silicone contamination from lubricants and mold release: Silicone-based mold release agents and lubricants can migrate into food. Only food-grade silicone products should be used in production, and residual levels must be verified.
- Assuming equivalence across regions: A material approved under FDA 21 CFR is not automatically compliant with EU 10/2011 (and vice versa). The positive lists differ, and SMLs may vary significantly between jurisdictions.
- Incomplete supplier documentation: A material data sheet alone is insufficient. Full compliance requires traceable documentation including DoC, migration test reports, and evidence of audit trail through the supply chain.
Häufig gestellte Fragen
Was sind die wichtigsten Unterschiede zwischen den Vorschriften der FDA und der EU für Lebensmittelkontaktmaterialien?
The FDA system is risk-based and evaluates the safety of the finished article in its intended use. Substances not covered by an existing regulation can be submitted through the Food Contact Notification (FCN) process, which is confidential to the notifier. The EU system is substance-based: every monomer, additive, and production aid must appear on the Union List with a defined SML. The EU also mandates a written Declaration of Compliance for each material. In practice, EU compliance is generally more prescriptive and documentation-intensive, while FDA compliance allows more flexibility through the FCN pathway. For products sold in both markets, dual compliance must be verified independently.
Kann PA6 (Nylon 6) für den direkten Kontakt mit Lebensmitteln verwendet werden?
Yes, PA6 is widely used in food contact applications — but only when produced using approved monomers (caprolactam) and additives. Caprolactam has an SML of 15 mg/kg under EU 10/2011. The material must be tested to confirm caprolactam migration stays below this limit. PA6 is commonly found in meat processing equipment, conveyor components, coffee machine parts, and kitchen utensils. The key requirement is that the specific grade be formulated and documented for food contact use — an uncertified industrial PA6 grade is not suitable, even if the base polymer is chemically identical.
Welche Unterlagen sollte ich von meinem Kunststofflieferanten anfordern?
For EU compliance, request a Declaration of Compliance (DoC) per EU 10/2011 Article 15, which must include: (1) identity of the manufacturer/importer, (2) identity of the material/article, (3) date of declaration, (4) confirmation of compliance with applicable regulations, (5) information on substances subject to SMLs or restrictions, (6) adequate information on restricted-use substances, (7) specification of use conditions (food types, time, temperature), and (8) the overall migration ratio when a functional barrier is used. For FDA compliance, request a letter of compliance oder FCN reference number, along with supporting test data. Additionally, request migration test reports, formulation disclosure statements, und ISO 9001 or FSSC 22000 certification as evidence of quality management systems.
Wie oft sollte die Konformität mit den Lebensmittelvorschriften neu zertifiziert werden?
There is no fixed recertification interval in either FDA or EU regulations. However, best practice recommends: (1) Annual DoC renewal — suppliers should reissue declarations at least yearly to confirm no formulation changes have occurred. (2) Re-certification upon any change — any modification to raw materials, additives, processing conditions, or the supplier of a critical input requires new migration testing and updated documentation. (3) Periodic surveillance testing — many end users conduct annual migration spot-tests as part of their supplier quality program. (4) NSF-listed materials are subject to annual unannounced audits and re-certification. In practice, large food companies often require their suppliers to confirm compliance annually as a contractual condition, even if the regulations do not explicitly mandate it.
Making Confident Material Choices
Food-grade compliance is ultimately about documented, verifiable safety. The most technically suitable plastic is useless if its compliance pedigree cannot be demonstrated. When specifying materials, insist on full documentation covering formulation, migration testing, and supply chain traceability. The cost of compliance is insignificant compared to the cost of a recall.
