Flat Pouch & Sachet — Regulatory & Compliance Guide

The Specification That Drives Compliance — Fill Type, Not Film Type #

When brand partners send us a brief for a flat pouch or sachet, the first question we ask is not “what’s your laminate structure?” — it’s “what are you filling, and in what market?” That sequence matters because regulatory frameworks for flexible packaging are organized around the food or product contact scenario, not the film substrate alone.

The functional barrier concept under EU Regulation No 10/2011, Article 14 defines when a non-compliant layer is permissible because migration across the barrier is mathematically below the threshold. For a PET/adhesive/Al foil/PE laminate targeting a dry powder sachet (≤0.5% moisture), foil acts as a functional barrier and the PET outer layer’s ink compliance is a secondary concern. For an oil-in-water emulsion at the same 20g sachet weight, the calculation shifts entirely — lipophilic migration through PE is accelerated, and you now need to reference FDA 21 CFR §175.300 (resinous and polymeric coatings) or §177.1520 (olefin polymers) depending on your sealant layer.

This is why fill chemistry — pH, fat content, water activity, alcohol concentration — is the specification that unlocks the correct regulatory path. Board grade, film gauge, and print process come after.

Two standards anchor most of the material qualification work we do: EN 13432:2000 for compostable claims (relevant when brands want “sustainable sachet” positioning in the EU), and ASTM F2096 for gross leak detection in heat-sealed pouches, which is the test our QC line runs on every sachet lot before shipment.

Supplier Qualification — What to Request and What the Response Tells You #

When you’re onboarding a new flat pouch or sachet supplier for a regulated market, the documentation request sequence reveals a lot about a factory’s actual compliance infrastructure — not just their claimed certifications.

Start with a food-contact compliance declaration (FCD) for each substrate layer in the laminate structure. Ask them to specify the regulation under which each layer is declared compliant: EU 10/2011, FDA 21 CFR Part 177, or GB 9685-2016 for the Chinese domestic market. A supplier who returns a single PDF covering the whole structure without layer-by-layer attribution has probably not done independent migration testing — they’re relying on resin supplier data sheets, which cover virgin polymer only and don’t account for converter-added adhesives, primers, or coating layers.

Ask specifically for adhesive compliance data. Solvent-based lamination adhesives in direct or indirect food-contact applications are regulated under REACH Regulation (EC) No 1907/2006, and the residual solvent level in a finished laminate matters. Our internal acceptance limit for residual solvent (measured by GC-MS on bonded laminate samples, not the wet adhesive alone) is ≤5 mg/m² total, with no single solvent exceeding 1 mg/m². Suppliers who quote only the adhesive manufacturer’s SDS without finished-laminate test data are giving you incomplete information.

For inks, ask for compliance against EuPIA Good Manufacturing Practice and, if the structure has no functional barrier, a Cramer classification or Threshold of Toxicological Concern (TTC) assessment for each colorant. The turnaround on this request is itself informative: a well-organized converter returns this within 3–5 business days. If it takes three weeks and arrives incomplete, that’s a process gap, not a documentation backlog.

For US markets, ask whether the supplier has a written Supplier Qualification Protocol that includes a requalification trigger. Some converters requalify annually on a fixed schedule. Others only requalify after a raw material formulation change. We use what we call the MTX-03 material change trigger protocol — any supplier-initiated change to resin grade, adhesive lot, or ink formulation automatically opens a requalification review, regardless of when the last audit occurred.

Cost-Performance Trade-offs in Compliance Documentation #

Compliance documentation adds cost in two places: upfront qualification testing and ongoing lot-by-lot verification. How you balance these depends on your volume, market, and fill type.

For a low-volume trial run (below 50,000 units), full third-party migration testing per EU 10/2011 simulant conditions (simulant A through E, per Annex III) costs roughly €1,500–€3,500 per test report and takes 4–6 weeks. At this volume, you’re paying per-unit documentation costs that are commercially unsustainable without a clear commercialization path. Our advice: use a pre-validated laminate from our approved structure library where migration data already exists, and scope the new testing to only the layers that differ.

For high-volume, continuous production (above 500,000 units/month), investing in a full simulant migration study and annual re-test is easily justified. The cost delta between a fully documented structure and an undocumented one at that volume is under $0.003 per pouch — marginal against the cost of a product recall or market withdrawal.

The counterargument for lighter documentation: single-market non-food applications. A cosmetic sachet sold only in China under GB/T 19787 (the Chinese standard for pharmaceutical and cosmetics packaging) does not need EU 10/2011 compliance, and mapping EU-style migration tests to GB requirements is redundant cost. We see brands over-engineer documentation when they spec a European food-contact framework for a Chinese cosmetic product line because they assumed the higher standard was always safer. For multi-market launches, yes — spec to the most demanding framework. For single-market cosmetics, match the framework to the market.

Technical Deep-Dive — Market-by-Market Compliance Framework Comparison #

The three markets where we ship the most flat pouch and sachet volume — EU, US, and mainland China — have genuinely different regulatory architectures, and the documentation required for each does not translate directly between them.

The EU framework is positive-list based: only substances explicitly listed in EU 10/2011 Annex I are permitted in food-contact plastics. This means a polymer additive that is standard practice in Asian film extrusion may have no EU listing — making the whole structure non-compliant regardless of measured migration levels. The overall migration limit (OML) is 10 mg/dm², tested across four simulants (A: 10% ethanol; B: 3% acetic acid; C: 20% ethanol; D1: 50% ethanol; D2: vegetable oil). For sachets under 500 ml capacity with a contact surface that can’t be directly measured, conversion factor 6 dm²/kg applies.

The US FDA framework operates on a “reasonably expected use” basis with indirect food additive authorizations under 21 CFR Parts 170–189. The agency does not maintain a positive list of approved substances in the same sense — instead, compliance is established by matching each component to an applicable threshold or regulation, or by submitting a Food Contact Notification (FCN) for novel materials. For OEM brands targeting US food retail, we recommend requesting a written FDA compliance memo from your converter for each structure, signed by a qualified food safety professional.

China’s GB 9685-2016 is a positive-list standard analogous to EU 10/2011 but with different permitted substance lists, different migration limits for some substances, and enforcement increasingly aligned with GB 4806.7-2016 for food contact plastics. The 2023 revision cycle has tightened limits on several plasticizers that were previously permitted at higher levels.

Market compliance comparison for flat pouch and sachet structures

One complexity we track actively: when a brand sells the same sachet SKU in both EU and the US, the simulant testing protocols don’t fully overlap. EU simulant D2 (vegetable oil) is the closest proxy for fatty food contact; the FDA equivalent is Condition of Use Type H (high-temperature). They’re not the same test, and a report covering EU simulants does not automatically satisfy a US auditor. We’ve logged 4 customer inquiries in 2024 alone where brands assumed cross-recognition applied — it does not without explicit equivalence mapping.

One open question we’re still tracking: the EU Packaging and Packaging Waste Regulation (PPWR), currently in transition, will impose recyclability performance grades on flexible packaging. How that interacts with multi-layer laminate structures — specifically whether current PET/Al/PE sachets will require reformulation or exemption documentation — remains unresolved as of mid-2025. We’re running trials on mono-material PE and EVOH-containing structures as contingency.

Specification Notes for Brand Partners #

When you brief us on a flat pouch or sachet project for a regulated market, the most useful information you can send upfront is: fill product name and composition (especially fat content, pH, and any alcohol or acid concentration), target market or markets, intended shelf life, and whether the product carries any on-pack claims (compostable, recyclable, food-contact certified).

The single brief gap that causes the most sample iterations is undisclosed multi-market scope. A brief that says “food sachet, EU market” leads to one laminate specification and one documentation package. If the brand later adds “and also US and Australia,” that often means a structural change — not just a documentation addition — because the sealant layer or adhesive system may not hold compliance across all three frameworks simultaneously. Tell us about all target markets at the start of the project.

Our standard sampling timeline for flat pouch and sachet structures from our pre-validated library is 10–15 working days for printed samples with compliance documentation. New laminate structures requiring fresh migration testing add 4–6 weeks, which is the testing lab’s lead time, not ours. If your product launch window is fixed, build the compliance testing phase into your development calendar before sampling begins, not after.

What food-contact regulation applies to my flat pouch if I’m selling in both the EU and the US?

Both apply simultaneously, and they don’t automatically cross-recognize each other’s test data. EU 10/2011 requires simulant-based migration testing; FDA compliance is established through 21 CFR Part 177 authorizations or a Food Contact Notification. You need documentation that satisfies each framework independently, which is why we ask about all target markets at brief stage, not after the laminate is locked.

Does a Declaration of Compliance from a film supplier cover my finished pouch?

No. A film supplier’s DoC covers the substrate they produced. Once a converter adds adhesives, inks, primers, and heat-seal coatings, the finished laminate has additional layers that aren’t covered by the film DoC. The converter — our factory — must issue a DoC for the complete structure, including all added layers.

What migration testing is needed for a sachet holding an oil-based cosmetic, not a food product?

It depends on the market. For EU cosmetics, the relevant framework is EU Cosmetics Regulation No 1223/2009, not 10/2011 — but if the sachet makes any incidental lip or food-area contact claim, the food-contact framework may still apply. For China, GB 9685-2016 covers cosmetic packaging materials. Migration testing scope and simulant choice shift depending on this classification, so product category matters as much as fill chemistry.

Our laminate has a foil layer — does that exempt us from migration testing?

Foil as a functional barrier reduces the migration risk from outer layers substantially, but the exemption under EU 10/2011 Article 14 is conditional: the functional barrier must demonstrably limit migration to ≤0.01 mg/kg per non-listed substance. That requires either a validated calculation or empirical test data. The claim can’t rest on the presence of foil alone without supporting evidence.

What is your standard lead time for a new sachet structure that requires fresh compliance documentation?

For structures drawn from our pre-validated library, printed samples with existing compliance documentation take 10–15 working days. A new laminate structure requiring third-party migration testing adds 4–6 weeks for the laboratory phase. In total, plan for 6–8 weeks from brief to compliant sealed sample for a genuinely new structure in a regulated food-contact market.

How do you handle requalification when your raw material suppliers change a formulation?

Our MTX-03 material change trigger protocol flags any supplier-notified change to resin grade, adhesive lot, or ink formulation and opens a requalification review automatically. For high-migration-risk materials (adhesives and inks in direct contact structures), requalification includes fresh GC-MS residual solvent testing and, if the change is significant, repeat migration testing. For low-risk changes to outer-layer substrates with a confirmed functional barrier, a documented risk assessment with no new testing may be sufficient.

Can a single laminate structure satisfy EU, US, and China food-contact compliance simultaneously?

Sometimes. A PET/adhesive/foil/PE structure with a food-grade polyurethane adhesive and EuPIA-compliant inks can often be documented for all three markets because the key parameters — positive-list compliance, migration limits, and residual solvent levels — align. The challenge arises at the documentation level: each market requires its own format (EU DoC, FDA compliance memo, CMA-accredited test report for China). The structure may be the same; the paperwork package is market-specific.

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