Industries / Food & Beverage
Molded Fiber Packaging for Food & Beverage
Compostable is a disposal property. Food-contact suitability is a separate qualification. Transport protection is a third. This sector routinely treats all three as one question, and packaging projects stall when the answer to one is assumed to cover the others.
Three Separate Questions, Usually Asked as One
Most food and beverage packaging briefs arrive with the questions already tangled together. Untangling them is the first engineering task.
The first question is mechanical. Will the pack hold the product through stacking, handling and the distribution profile it actually meets? A pallet of filled bottles applies sustained vertical load for days. A tray of fruit travels through a cold chain where humidity changes at every transfer point. Neither is a drop-test problem, and neither is solved by material choice alone.
The second question is contact. Does the fiber touch the food, and if so, under what conditions — dry, moist or fatty, at what temperature, for how long, in which market? Contact status determines the raw material route, which additives and coatings are permissible, the production environment and the documentation that must accompany every batch. It is a qualification carried out per product and per market, not a property the material has or does not have.
The third question is end of life. Recyclability, recycled content and compostability are separate properties with separate evidence requirements, and a claim about one says nothing about the others. THECA keeps these three questions apart in every project, because merging them is how a packaging decision gets made on the wrong evidence and has to be unpicked after tooling has been cut.
Applications in Food & Beverage
Some of these formats touch the product; some never do. The distinction runs through every design decision below.
Bottle dividers for Bordeaux, Champagne and Burgundy formats
A filled wine bottle is heavy, glass-walled and unforgiving of contact with its neighbour. The divider keeps bottles apart through handling and carries the load of everything stacked above it, which in a distribution centre can mean several pallet layers for days. Wall structure and rib geometry are specified against the filled weight and the actual stack configuration, not the empty bottle. These are transport formats: the fiber contacts the closed bottle, not the product inside it.
Molded fiber bottle dividersProduce trays for fruit and vegetables
Fresh produce is damaged by point loading and by its own weight in a stack. The cavity is shaped to spread contact across the fruit's surface rather than concentrating it at a few points, and the tray's stacking geometry decides whether the load reaches the fruit below or is carried by the tray walls. Because produce respires and releases moisture, the tray's behaviour under changing humidity is part of the design brief rather than an afterthought.
Custom molded fiber packagingEgg and portion formats
Egg cartons are among the oldest molded fiber applications and remain among the most demanding: high cavity count, tight nesting, consistent denesting at speed, and a direct-contact relationship with the product. For formats in this group THECA holds product-specific manufacturer declarations of compliance and sample-specific accredited laboratory analysis, prepared for the identified product and its stated conditions of use. Those documents cover the product they name, and are extended to a new format only after the equivalent assessment has been carried out.
Custom molded fiber packagingTransport packs for chilled and ambient goods
Between a production site and a retailer, product travels in bulk. Transport formats control stacking within the outer case, separate units that would otherwise rub or collide, and keep the pack-out dimensionally predictable so cartonisation stays efficient. Where the route is chilled, the packaging is conditioned and assessed under those conditions rather than assumed to perform from ambient results.
Pulp wrap packagingLayer pads and pallet stabilisation formats
In beverage distribution the pallet is the unit that fails, not the individual pack. Layer pads distribute load across a layer, stop individual units from migrating during transport and make a mixed or high stack behave predictably. These are specified against the real pallet configuration, the number of layers and the storage duration, because compression performance is a function of time under load as much as of peak load.
Custom molded fiber packagingEngineering Priorities, in This Sector's Order
In food and beverage, the contact question comes first because it determines what material route is even available to the rest of the design.
Contact status and its documentation
Before any geometry work begins, we establish whether the fiber touches the food, under what conditions and in which market. That answer sets the raw material route, the permissible additives and coatings, the production environment and the documentation required per batch. Where contact applies, suitability is confirmed for the identified product and its stated conditions of use, supported by product-specific declarations and sample-specific analysis. It is never established by material type alone.
Moisture uptake and dimensional stability
Fiber takes up moisture from the air and from the product, and moisture content changes stiffness, dimensional stability and stacking performance. A tray that performs at 50% relative humidity behaves differently at 90%. Where the route involves humidity swings, condensation or direct moisture from produce, the packaging is conditioned and assessed under those conditions, and the geometry carries the safety margin rather than the assumption.
Compression under sustained stacked load
Beverage and produce pallets are heavy and stand for days. Compression is a time-dependent behaviour: a structure that holds a peak load for a minute may deform slowly under the same load over a week. Wall thickness, rib layout and the path the load takes through the stack are specified against the real pallet configuration, the number of layers and the expected storage duration, then confirmed with the filled product.
Cold-chain behaviour and condensation
Moving between a chilled store and an ambient loading bay produces condensation on cold surfaces, and that water ends up in the packaging. Where the product travels through temperature transitions, the assessment covers what happens to stiffness and stacking as the pack takes up that moisture, and how quickly it recovers. This is treated as a distinct test condition, not as a variant of ambient performance.
Cavity fit and product-specific damage modes
Different products fail differently. Glass fails on contact and on point impact at the shoulder; soft fruit bruises under sustained pressure; eggs fail on shell contact and on shock transmitted through the carton. The cavity is developed around the specific damage mode, including the product's real variability in size, rather than around a nominal dimension. Denesting behaviour is designed in from the first concept, because these formats are handled in volume.
Which Format Fits Which Food & Beverage Application
Note the contact column: it changes what evidence a project needs before anything can be specified.
| Format | Best for | Contact status | Typical protection function | Validation focus |
|---|---|---|---|---|
| Bottle dividers | Wine, sparkling wine and spirits in Bordeaux, Champagne and Burgundy formats | Contacts the closed bottle, not the product | Bottle-to-bottle separation and stacked load transfer | Compression over time, stack stability, glass contact behaviour |
| Produce trays | Fruit and vegetables in chilled and ambient chains | Usually direct contact; confirmed per product and market | Load spreading across the product surface; stack carried by the tray | Humidity conditioning, compression, bruising assessment |
| Egg and portion formats | High-cavity-count, high-volume direct-contact formats | Direct contact; supported by product-specific documentation | Individual cavity restraint and shock isolation | Contact suitability, denesting at speed, drop and stacking |
| Transport packs | Bulk movement between production, distribution and retail | Typically no direct contact | Separation and dimensional predictability within the outer case | Cartonisation efficiency, conditioned compression, handling |
| Layer pads | Beverage and high-stack pallet configurations | No direct contact | Load distribution across a layer; migration control | Static and dynamic compression, pallet stability over duration |
Material suitability, tolerances, coatings and any performance or compliance claim are confirmed per project against the specific application, market and supporting test evidence. Contact status shown here is typical, not a determination for a given project.
The Compliance Layer for Food Packaging
The EU Packaging and Packaging Waste Regulation (Regulation (EU) 2025/40) has applied across all member states since 12 August 2026. It attaches to the packaging system as placed on the market rather than to the material of any single component, and it covers minimisation, conformity documentation and substance restrictions now, with recyclability design requirements, recycled content thresholds and the empty-space ratio limit scheduled for 1 January 2030.
For this sector a second framework applies independently, and it is the one that usually decides the project.
The food-contact framework is a separate qualification
Where packaging is intended to come into contact with food, the framework requirements of the intended market apply — including, in the EU, the general requirements for food-contact materials and any national provisions that apply on top of them. The assessment is specific to the identified product, the food types it will meet, the conditions of use and the market. A result for one product under one set of conditions does not transfer to another product, another food type or another market without the equivalent assessment.
What THECA can document today
THECA operates a food-safety management system assessed against HACCP / TS 13001 for the production of molded cellulosic packaging, alongside an ISO 9001:2015 quality management system. For identified products, THECA holds product-specific manufacturer declarations of compliance and allergen declarations, together with sample-specific accredited laboratory analysis covering migration and related parameters. These documents cover the product and sample they name. They are not a company-wide food-contact approval, and they are not presented as one.
End-of-life properties are treated separately again. Recyclability, recycled content and compostability are distinct characteristics with distinct evidence requirements, and a statement about one is not a statement about the others. Where a specific claim is needed for a specific market, it is assessed and supported on its own terms.
THECA limits every regulatory, recyclability, compostability and certification statement to the specific material, application, market and supporting evidence it actually covers. Relevant certificates and analysis reports are available for review.
What Fiber Replaces Here, and What It Costs You
In this sector the incumbent is usually cheap, well understood and dimensionally exact. The honest comparison acknowledges all three.
Light, insulating and very cheap per unit. Fiber will not match EPS on thermal insulation, and where insulation is the controlling function that should be said plainly rather than engineered around. Where the box is doing mechanical work — stacking, protection, presentation — fiber competes well and removes a material that is increasingly restricted in retail supply.
Dimensionally precise, transparent and compatible with existing sealing equipment. Fiber matches them on stacking and improves the material story, but it does not offer transparency, and sealing to a fiber surface is a separate technical question with its own qualification. Where visibility is a genuine retail requirement, a hybrid format is usually the realistic answer.
The common incumbent in wine and spirits. Fiber replaces a glued or slotted assembly with one formed part, which shortens pack-out and behaves more predictably under humidity. The trade-off is tooling: corrugated dies are cheap and quick to change, fiber tooling amortises across volume. The comparison to run is cost per packed pallet across annual volume, not price per divider.
Frequently used for separation and void control. A designed fiber component removes these from the pack and, under PPWR, replaces something counted as empty space with something counted as packaging doing a job. The trade-off is that fiber needs a defined geometry, so it suits a stable SKU rather than a format that changes every season.
From Requirement to Production
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01 Application Review
Product dimensions and weight, filled weight where relevant, current packaging, pallet configuration and stack height, distribution route and temperature profile, and expected annual demand. For this sector we establish contact status and the intended market at this stage, because both determine which material routes are available.
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02 Design and Prototyping
Material route, wall structure, ribs, cavity geometry and nesting behaviour are developed around the application. Prototypes are used to review fit against the real product, packing sequence and compatibility with the outer case.
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03 Validation Against Food & Beverage Criteria
Compression with the filled product and the real stack configuration, humidity conditioning, cold-chain assessment where the route requires it, and handling and drop checks. Where contact applies, the supporting documentation route is agreed in parallel. Test scope and acceptance criteria are agreed before tooling approval.
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04 Tooling and Series Production
Series tooling, tolerances, inspection points, packing configuration and supply requirements are finalised. Production runs against the agreed specification, quality criteria and documented claims.
From Brief to First Sample in Four Weeks
For technically suitable projects, THECA can move from a complete packaging brief to the first molded fiber sample through a focused four-week route. For food and beverage projects, note that contact-related documentation follows its own timeline and is prepared alongside the sample rather than being produced by it.
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Week 1 — Product and Packaging Design
We review product geometry, protection points, packing sequence and material route, then develop the molded fiber concept using approved samples, drawings or 3D data.
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Weeks 2–3 — Mold Manufacturing
Once the design direction is approved, the sampling mold is manufactured and prepared for trial production, with forming, release and dimensional requirements taken into account.
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Week 4 — Sample Production
The first molded fiber samples are produced for an initial review of fit, handling and packing sequence, ahead of application-specific validation and series-production decisions.
The four-week target begins after complete technical data, product samples or approved 3D files and written design-scope confirmation have been received. Customer approval delays, design revisions, application testing, series tooling and mass-production lead time fall outside this target.
Food & Beverage Packaging FAQ
Do you have food-contact documentation we can reference in our own conformity file?
For identified products, yes. THECA holds product-specific manufacturer declarations of compliance and allergen declarations, together with sample-specific accredited laboratory analysis. These documents cover the product and sample they name, under the conditions of use stated in them. For a new product, food type or market, the equivalent assessment is carried out rather than the existing documentation being extended. Tell us the product, the food it will meet and the target market, and we will set out what exists and what would need to be prepared.
How does molded fiber behave in a chilled or high-humidity chain?
It takes up moisture, and moisture content changes stiffness and stacking performance. That is a design input rather than a disqualification. Where the route involves chilled storage, temperature transitions or condensation, the packaging is conditioned and assessed under those conditions and the geometry carries the margin. What we will not do is quote ambient compression figures and let you assume they hold at 90% relative humidity.
Can fiber bottle dividers carry a full pallet of sparkling wine?
Frequently, yes, but it is specified rather than assumed. Sparkling wine bottles are heavier and thicker-walled than still wine, and the load case is sustained compression over days rather than a peak event. Wall structure and rib layout are developed against your actual filled weight, layer count and storage duration, then confirmed with the real product before tooling is approved.
Will a produce tray absorb moisture from the fruit and lose stiffness?
Produce respires and releases moisture, and the tray will reach an equilibrium with its environment. The question is whether the resulting stiffness still carries the stack for the required duration. We assess this under the real conditions rather than at ambient, and where the exposure is severe we will say whether the geometry can carry it or whether a protective approach belongs in the pack.
Are your food and beverage products compostable or recyclable?
These are two separate properties with separate evidence requirements, and neither is claimed generally. Recyclability is assessed against the relevant framework for the packaging as placed on a specific market. Compostability is a product-level certification route that has to be pursued and evidenced for the specific product and standard. Where a claim is genuinely needed, we will tell you what evidence exists today and what would have to be established.
Can you match our existing plastic tray's cavity dimensions exactly?
Usually not exactly, and a direct copy is rarely the right target. Achievable dimensional tolerance depends on the forming route and is agreed at the concept stage. More importantly, a cavity optimised for a thermoformed plastic wall behaves differently in fiber, where wall thickness and draft carry structural work. We redevelop the cavity around the same retention and protection requirement, and confirm fit and line compatibility with the real product.
Tell Us What It Holds, and Where It Goes.
Send your product dimensions, filled weight, current packaging method, pallet configuration, distribution route and temperature profile, the intended market and expected annual volume. Our engineering team will separate the transport question from the contact question, tell you what documentation each would require, and identify the next technical step — including telling you if molded fiber is not the right route.
- Dr. Engin Sarıkaya Commercial engin.sarikaya@wetheca.com
- Dr. Artunç Alptekin Technical artunc.alptekin@wetheca.com
- Dr. Eda Özay Sustainability eda.ozay@wetheca.com
Main line +90 258 244 00 43