Mono-Material Flexible Packaging

Orientation for mono-material flexible packaging: relevance, structure and barrier factors, specifications to prepare and line-trial steps.

Buyer summary

What it is: Flexible packaging built mainly from one polymer family (usually PE or PP) to support recycling. The term has no single definition.
Main applications: Stand-up and pillow pouches for snacks, powders and frozen food, bags, wraps and lidding.
Critical purchasing specifications: Layer-by-layer structure with polymer types and percentages
Barrier needs and the barrier layer used (for example EVOH content)
Ink, adhesive and tie-layer declarations
Recyclability guideline, version and region (for example RecyClass or APR)
Machine and seal requirements
Qualification considerations: Each guideline sets compatibility limits, such as RecyClass penalties, and local collection and sorting decide real outcomes. A "recyclable" statement without a named guideline is a claim, not evidence.
First step: Record the product, the packing machine, the barrier need and the market where the claim will be made.
How PAXOMER can assist: Mono-material packaging trades barrier, stiffness and sealing against recyclability claims. PAXOMER can help record the product, machine and recycling target, identify film and converter manufacturers able to build compliant structures, and coordinate trial structures. Commercial discussions can then address formats, volumes and documentation for recyclability statements. Manufacturer identification, qualification support and pricing discussions depend on manufacturer confirmation, specifications, quantities and terms.

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Detailed technical guidance, data tables, FAQs and technical references follow below.

Food-contact and claim documentation. Food-contact suitability and environmental or recycled-content claims depend on the exact material, use and market. Request written documentation; this page confirms none.

General technical information published by PAXOMER Inc. to support preliminary material evaluation. It is compiled from the sources cited on this page and has not been independently reviewed or certified by a professional engineer, laboratory or certification body. Values marked typical, illustrative or requiring confirmation are not specifications. Confirm properties, standard editions, regulatory status and suitability for your specific application with the manufacturer and, where the use is regulated or safety-related, with a qualified professional or the relevant authority.

Mono-material flexible packaging is a pouch, bag or lidding film built mainly from one polymer family, usually polyethylene or polypropylene, so that the used pack can be sorted and recycled as one stream. The phrase is easy to say and hard to certify. “Mono” does not mean one layer; it means the layers, barrier, inks, adhesives and closures stay within what a recycling guideline allows, and the guideline, the region and the recycler decide whether the pack counts as recyclable. A pack that is 98% polyethylene can still fail on one component.

This page is general technical orientation for brand owners, converters, film makers and buyers. It uses a published design-for-recycling guideline for natural PE flexible films to show the kinds of limits that decide recyclability, explains how to read such guidelines, and sets out how to evaluate a mono-material structure. It is not a recyclability certificate, and it does not state that PAXOMER stocks, represents or has qualified any film or that any structure is recyclable.

A. Product identity and terminology

1. What is mono-material flexible packaging?

It is flexible packaging designed so that one polymer family dominates and the remaining components fit a recycling guideline. The guide Recyclable mono-material flexible packaging covers the family in general terms; oriented PE films for such structures are discussed on MDO-PE and BOPE films. The CEFLEX position paper calls for evaluating the functional requirements of packaging and, where possible, redesigning existing flexible packaging to a recyclable mono-material (S2).

2. Why is “all PE” not enough to call a pack recyclable?

Because the guideline counts everything on the pack: barrier layers, tie layers, inks, laminating adhesives, labels, closures, additives, colour and size. In the RecyClass guideline a pack is penalised for each limited item and fails for any non-compatible one, so a high PE content with one non-compatible element (for example an aluminium layer or a PET label) is not recyclable under it (S1).

3. Where are mono-material structures used?

Stand-up pouches, pillow pouches for snacks, powders and frozen food, bags, wrap and lidding. The article on oriented PE films sees both MDO and BOPE films as replacing BOPET and BOPP in some pouch formats (see the page on MDO-PE and BOPE films). Applications with high barrier needs are more demanding and are covered on High-barrier packaging materials.

4. When is a mono-material design a fit, and when not?

Likely fits: products with modest barrier needs, short to medium shelf life and regions where PE film collection exists.

Harder cases: long shelf life with high oxygen barrier, hot-fill or retort, very high stiffness, and products that need a heat-resistant outer layer that survives sealing. Trade-offs include barrier, stiffness, heat resistance and the loss of the incumbent structure’s machinability; redesign needs trials.

5. Which terms will I meet?

Mono-material, design for recycling, recyclability class, limited compatibility, non-compatible, tie layer, EVOH, PE-g-MAH, PP attachment, easy-to-empty index, sorting test, recycle-ready, post-consumer recycled content, store drop-off, EuPIA. Glossary: density.

B. Properties and performance

6. How does the RecyClass guideline classify a pack?

The page for natural PE flexible films for household and commercial packaging (last updated March 2026) assigns class by total PE and PP attachment content: A at least 95%, B at least 80%, C at least 70% and non-recyclable below 70%. Each limited-compatibility item applies one penalty, moving A to B, B to C or C to non-recyclable. Products with a packaging surface of 30 to 100 cm² require a sorting test, and an easy-to-empty index applies: A up to 5%, B up to 10%, C up to 15%, above 15% non-recyclable (S1). The resin may be fossil- or bio-based, virgin or recycled (S1). The page defines no further classes and does not define mono-material.

Recyclability class thresholds in the RecyClass natural PE film guideline

From the RecyClass page 'Natural PE Flexible Films for Household and Commercial Packaging' (last updated March 2026, no version number). Thresholds read from the page; check the current guideline and the evaluation tool before relying on any figure.

Recyclability class thresholds in the RecyClass natural PE film guideline
Property	Value or range	Unit	Test conditions	Test method	Grade or construction	Source	Verification status
Class A, minimum PE + PP attachment content	95	%	Main body plus attachments	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Class B, minimum content	80	%	Main body plus attachments	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Class C, minimum content	70	%	Main body plus attachments	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Non-recyclable	below 70	%	Total PE and PP attachment content	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Easy-to-empty index limits A / B / C	5 / 10 / 15	%	Above 15% non-recyclable	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Sorting test required for packaging surface	30–100	cm²	Products in this size range	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)

7. Which components are compatible, limited or non-compatible?

Per the RecyClass page: LDPE, LLDPE (including PE plastomers) and HDPE are fully compatible, as are certain copolymers (EVA, EBA, EEA, EMA with vinyl acetate or acrylate up to 5% of the film; EMAA, EAA and ionomers up to 20%; C3C2 plastomers up to 15%) and e-beam treatment up to 9 kGy. Multilayer PE/PP with PP up to 5% and e-beam up to 15 kGy are limited; PP above 5%, any other polymer such as PET or PVC, and e-beam above 15 kGy are non-compatible (S1). For barriers, SiOx and AlOx without additional coatings are fully compatible, and EVOH up to 5% with PE-g-MAH tie layers (MAH above 0.1%) and an EVOH to tie-layer ratio of 1 or less is fully compatible; EVOH up to 5% with a ratio above 1, or up to 15% PA 6/6.6 with specified melting point and tie layers, is limited; EVOH above 5%, other PA, metallisation, PVOH, PVC, PVDC, other barrier layers, AlOx with a PVOH primer and aluminium are non-compatible (S1). The extraction of the page flagged that the barrier table layout is ambiguous in places, so column assignments must be verified against the guideline.

Selected component limits in the RecyClass natural PE film guideline

As read from the RecyClass page; the barrier table layout was ambiguous in the extraction, so assignments of EVOH and PA limits need checking against the source. Not a certification of any pack.

Selected component limits in the RecyClass natural PE film guideline
Property	Value or range	Unit	Test conditions	Test method	Grade or construction	Source	Verification status
Fully compatible: EVOH with PE-g-MAH tie layers	up to 5 (ratio EVOH:tie ≤ 1; MAH > 0.1)	% of film	Barrier layer	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Confirm against the cited standard or source
Limited: EVOH with ratio above 1	up to 5	% of film	Barrier layer	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Confirm against the cited standard or source
Limited: PA 6/6.6	up to 15 (melting point ≤ 192 °C; ≥ 10% PE-g-MAH tie layers)	% of film	Barrier layer	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Confirm against the cited standard or source
Non-compatible: EVOH	above 5	% of film	Barrier layer	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Confirm against the cited standard or source
Non-compatible barriers	metallisation, PVOH, PVC, PVDC, aluminium, other layers	list	Barrier layer	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Confirm against the cited standard or source
Fully compatible: aliphatic polyurethane or water-based acrylic laminating adhesive	up to 2.5	%	Laminating adhesive	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Non-compatible laminating adhesives	aromatic polyurethanes; high-thermal or high-chemical-resistance adhesives; others such as epoxy	list	Laminating adhesive	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Additive density limit (fully compatible)	not above 0.97	g/cm³	Additives	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Colour: unpigmented or transparent	fully compatible	n/a	Main body	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Colour: dark, black or carbon black	non-compatible	n/a	Main body	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)
Pack size: above 100 / 30–100 / up to 30	fully compatible / limited / non-compatible	cm²	Packaging surface	RecyClass design-for-recycling guideline	Natural PE flexible films	S1	Verified reference value (published source)

8. How do inks, labels and closures enter the assessment?

The page lists as fully compatible EuPIA-compliant non-bleeding inks, PU, PVB and PA-based inks and lacquers, and printed production or expiry dates, with mandatory information using inks up to 0.25% limited, and NC-based, bleeding, EuPIA non-compliant, PVC and chlorinated-binder inks non-compatible. PE facestock labels are fully compatible and PP limited; metallised and other labels non-compatible; label adhesives that are water-soluble or water-releasable below 40 °C are the compatible option. Closures in LDPE, LLDPE or HDPE are fully compatible, PP limited, and metal, aluminium, PVC, PET, PETG, PS, PLA and foams below 1 g/cm³ non-compatible. Packaging printed on more than 30% of its surface is assessed under the guideline for coloured PE flexible packaging (S1).

9. How do other guidelines and regions differ?

CEFLEX’s position paper (reported 15 September 2020) strongly recommends flexible packaging from recyclable mono-materials, and states that more than 80% of flexible packaging is mono-material PE or PP (S2). In North America, the Association of Plastic Recyclers publishes the APR Design Guide for Plastics Recyclability, including a PE Film Critical Guidance Test Protocol, a Metal Sortation Potential Test Protocol and PE Film Standard Processing Lab Practices; recognition requires passing the protocol at a third-party lab and submitting results to APR for review (S3). The sources read give no numeric limits for APR, so a design checked against one guideline is not automatically accepted under another. Regional law (for example EU packaging legislation) and extended-producer-responsibility schemes add further rules; those were not reviewed here.

10. What does a typical mono-material PE structure look like?

Common constructions pair a stiff oriented PE print web with a PE sealant web, joined by a laminating adhesive; barrier is added by coating, SiOx or AlOx deposition or a small EVOH layer within the guideline’s limits. Details and film data are on MDO-PE and BOPE films, and the comparison All-PE versus multilayer packaging sets out the differences from conventional laminates. These are common design approaches, not a recommendation for any product.

C. Manufacturing and processing

11. How are mono-material structures converted?

Films are printed (flexo, gravure or digital), laminated with solventless or other laminating adhesives (see Solvent-free laminating adhesives), slit and made into pouches or reels. Converting needs trials for sealing windows, because PE/PE structures can have narrower heat windows than conventional laminates, and heat resistance of the outer web can limit sealing temperature.

12. What problems appear and how are they diagnosed?

Problems, possible causes and checks
Observed problem	Possible cause	Check
Shelf life falls short	Oxygen or moisture barrier too low for the product	Barrier of the finished laminate; storage conditions
Seal burn-through or weak seals	Heat window too narrow; outer web softening	Seal and hot-tack window of the actual structure
Pack fails the recyclability review	One non-compatible element (colour, label, closure, ink, barrier)	Component-by-component review against the guideline
Machine problems on form-fill-seal line	Lower stiffness than incumbent; COF	Stiffness; COF; web handling
Adhesive lamination strength low	Adhesive choice for PE; treatment decay	Treatment level; adhesive compatibility and cure
Delamination or tunnelling	Mismatch of web shrinkage or modulus	Web tension; structure balance

Source basis: guide sections on production problems; causes are general practice.

D. Applications and qualification

13. How should a mono-material redesign be approached?

List the incumbent structure and every function each layer provides (barrier, stiffness, seal, print, heat resistance, appearance). Map each function to a candidate within the target guideline, then compare trials of the full pack against the incumbent on barrier, seal, machinability, shelf life and cost. Run the recyclability check on the final structure, including inks, adhesives, labels and closure, using the guideline or the tool its owner provides (S1, S2).

14. How should a trial be run?

Document the incumbent and the candidate structure layer by layer, with gauges and the components listed in the guideline.
Check each component against the chosen guideline and record the penalties.
Produce trial laminates and packs on production equipment.
Test seal strength and hot tack, barrier (WVTR, OTR) at agreed conditions, drop and leak, and shelf life with the product.
Check printing, ink adhesion and treatment decay over storage.
Obtain an independent recyclability assessment or recognition where the market requires it.

Source basis: S1 for the review elements; S3 for the recognition route in North America.

15. Which documents should be requested?

Layer-by-layer structure disclosure with polymer types and percentages; ink and adhesive declarations; EVOH/PA and tie-layer data; barrier data with conditions; food-contact declarations with scope; and recyclability assessments from recognised bodies with the exact structure covered. A supplier’s statement that a film is “recyclable” without a named guideline, version and structure is a claim, not evidence.

16. What acceptance criteria are sensible?

Criteria belong to your specification: seal strength, barrier, shelf life with the product, stiffness and machinability, print quality and the recyclability review result. This page provides no limits; the guideline thresholds above are those of one guideline.

17. How should films and packs be stored?

Follow supplier instructions; in general store reels on end or cores, wrapped, away from heat and sunlight, and condition before converting. These are general practice statements.

E. Procurement, comparisons and decisions

18. Which commercial formats are common?

Reels of print web, sealant web and laminate, pre-made pouches and bags, and lidding films. Specify layer structure, gauge, width, treatment, core and the recyclability guideline to be met.

19. What information is needed to request a quotation?

Product, shelf life and barrier needs; pack format and filling machine.
Current structure and the target guideline and region.
Print process, laminating adhesive preference, labels and closure.
Gauge, width, treatment; colour restrictions.
Quantities, trial quantity, packaging and destination; documents required.

Use the RFQ brief tool to assemble this in the browser.

20. What do purchasing teams usually ask?

Which guideline and version does the claim rely on; who performed the assessment and for what exact structure; what barrier does the structure deliver; who makes each layer; and what happens if the guideline changes. Ask for the layer disclosure, not only a recyclable claim.

21. How should cost and performance be compared?

Compare cost per pack including film, adhesive, conversion yield, line speed and shelf life, and consider regulatory or scheme fees tied to recyclability. Cost of the redesign includes trials, requalification and any shelf-life testing.

22. What regulatory and sustainability questions arise?

Recyclability claims are regulated or guided differently by region, and recycled content, food contact and labelling add further rules. Confirm the guideline version, region and any legal requirement that applies; the sources read here do not establish legal compliance for any pack. This page makes no declaration for any product.

23. What supplier qualification questions should be asked?

Who makes each layer; which guidelines and tools were used for the claim; how changes are controlled so the structure stays within the assessed limits; and what technical support is available. See the supplier qualification checklist. PAXOMER does not confirm any supplier’s approvals or capacity on this page.

Guide: Recyclable mono-material flexible packaging
Guide: Flexible packaging films
Comparison: All-PE versus multilayer packaging
Related page: MDO-PE and BOPE films
Related page: Solvent-free laminating adhesives
Related page: High-barrier packaging materials

Manufacturing Regions & International Supply

No country-level manufacturing evidence specific to Mono-Material Flexible Packaging was confirmed in the review.

If you are evaluating manufacturers abroad, list in your RFQ brief the destination market, the documents you require and the delivery terms.

Engineering and purchasing FAQs

Each answer is general technical information, not a specification or a quotation.

What does mono-material packaging mean?

It means a pack designed so that one polymer family, usually polyethylene or polypropylene, dominates and the other components fit a recycling guideline. The term has no single definition, and the guidelines read here do not define it.

Is an all-PE pouch automatically recyclable?

No. Under the RecyClass guideline read, barrier layers, adhesives, inks, labels, closures, colour and size all count, and a non-compatible element makes the pack non-recyclable under that guideline.

How much EVOH can a PE pack contain?

The RecyClass page read lists EVOH up to 5% with specified tie layers as fully compatible and above 5% as non-compatible, but the table layout in the extraction was ambiguous, so check the current guideline.

Can a metallised film be used in a recyclable PE pack?

Under the RecyClass page read, metallisation is listed among non-compatible barriers, while SiOx and AlOx without additional coatings are fully compatible. Check the current guideline and tool.

Does colour matter for recyclability?

According to the RecyClass page read, unpigmented or transparent is fully compatible, light or translucent is limited, and dark, black or carbon black is non-compatible.

Do European and North American guidelines agree?

Not necessarily. RecyClass, CEFLEX and APR publish different documents, and the sources read give numeric limits only for RecyClass. A design checked against one is not automatically accepted under another.

Who certifies a pack as recyclable?

This depends on the scheme. APR requires passing its protocol at a third-party lab and submitting results for review before recognition. Ask for the named assessment and exact structure covered.

What information is needed for a quotation?

Product and barrier needs, pack and machine, current structure, target guideline and region, print and laminating preferences, labels and closure, gauge and width, quantities, trial quantity and destination.

Does PAXOMER supply recyclable mono-material films?

This page does not confirm stock, representation, supply or qualification for any product, and it makes no recyclability claim for any structure. PAXOMER works in technical supply and manufacturer development; describe your application in an inquiry to discuss whether a suitable qualified manufacturer can be identified.

Technical References

References below were opened on the access date shown. A source supports only the statement it is cited for. Standards are cited by number and title from public catalogue entries; their full text was not read unless stated.

S1. RecyClass design-for-recycling guideline: Natural PE flexible films for household and commercial packaging. RecyClass, 2026-03. recyclass.eu/wp-content/uploads/2026/04/RecyClass-DfR-Guidelines-Natural-PE-Film (opens in a new tab) industry body · accessed 2026-10-27
Last updated March 2026; no version number; the extraction flagged ambiguous table layout for barriers and labels.
S2. Ceflex recommends use of recyclable mono-materials for flexible packaging. CEFLEX (reported by Recycling Portal), 2020-09-15. recyclingportal.eu/?p=58699 (opens in a new tab) industry body · accessed 2026-10-27
News report of a 2020 position paper; no definition or numeric target.
S3. APR publishes updated PE film guidance documents. Association of Plastic Recyclers (APR). plasticsrecycling.org/apr-design-hub/apr-design-guide-overview/ (opens in a new tab) industry body · accessed 2026-10-27
News page; names three documents; no date or numeric limits.

Evidence notes and limitations

What the information on this page does not establish. Confirm these points with the manufacturer, the current standard or the relevant authority before relying on them.

The RecyClass guideline (S1) was read through a page extraction that flagged ambiguous table layout (barriers and labels); EVOH, PA and label assignments must be verified against the guideline.
The RecyClass page gives no version number and its relationship to earlier editions was not checked.
CEFLEX and APR sources are news reports; the position paper and APR documents themselves were not read.
European and national legal requirements on recyclability were not reviewed.
Converting statements on sealing windows and lamination are general practice without a specific reference.
This page has not been independently technically reviewed or certified.

Facts checked against the cited sources

Class thresholds, easy-to-empty limits, sorting-test range, additive density limit, laminating adhesive limits and colour and size classes were read in S1.
The CEFLEX 80% statement and publication date were read in S2.
APR's three documents and the recognition route were read in S3.

How is this material typically built?

Conceptual, generic construction for orientation. No thickness, property or performance values are given because they depend on the grade, supplier and test method.