How to Choose the Right Paperboard for Food Packaging

Choosing the right paperboard for food packaging is not simply a matter of grammage, appearance or price.

A board that performs well in a folding carton may not be suitable for a hot-food container. A material with excellent printability may lack the stiffness required for a takeaway box. A board described as sustainable may still create difficulties during forming, sealing or recycling.

For food producers, converters and packaging buyers, the correct material must therefore be evaluated as part of a complete packaging system.

The most effective material selection considers:

• stiffness and mechanical strength

• printability

• grease and moisture resistance

• heat resistance

• barrier requirements

• sealing performance

• converting behaviour

• food-contact compliance

• recyclability

• total converted cost

At Papironova, we believe material selection should begin with the finished application, not simply with the paper grade.

Start With the Application, Not the Grammage

One of the most common questions in paperboard sourcing is:

What grammage do you recommend?

The better question is:

What does the finished package need to do?

Before choosing a paperboard, the following should be defined:

• What type of food will be packed?

• Will the product be hot, cold, frozen or stored at ambient temperature?

• Is the food oily, greasy or moist?

• How long will the food remain in contact with the packaging?

• Is heat sealing required?

• Will the package be reheated or exposed to elevated temperatures?

• What type of printing is required?

• Which converting machinery will be used?

• What level of stiffness is necessary?

• Is reduced-plastic or non-LDPE packaging required?

• Which food-contact regulations apply?

Once these questions are answered, the appropriate paperboard and barrier structure can be selected more accurately.

Grammage Matters, but Stiffness Matters More

Paperboard is commonly specified by grammage, measured in grams per square metre, or gsm.

However, two boards with the same grammage can perform very differently.

Packaging performance is also influenced by:

• fibre composition

• board thickness

• bulk

• layer construction

• moisture content

• fibre orientation

• coating

• caliper

• bending stiffness

A higher-bulk board can sometimes provide comparable rigidity at a lower grammage.

For converters and packaging buyers, this means that the stiffness-to-weight ratio can be more commercially meaningful than grammage alone.

Reducing grammage while maintaining sufficient stiffness may also improve material efficiency.

FBB for Food Packaging

Folding Boxboard, or FBB, is one of the most widely used paperboard grades for high-quality folding cartons and food packaging.

FBB typically provides a strong balance between:

• stiffness

• relatively low weight

• printability

• smoothness

• converting performance

• visual appearance

Typical applications include:

• confectionery

• bakery packaging

• dry food packaging

• frozen food cartons

• pharmaceutical cartons

• cosmetics

• premium consumer packaging

For applications requiring additional grease, moisture or liquid resistance, FBB can also be combined with specialised barrier coatings.

One of the main advantages of FBB is its relatively high bulk, which can provide good rigidity without relying entirely on higher grammage.

This makes it attractive where both material efficiency and packaging performance are important.

SBS and Solid Bleached Board

Solid Bleached Sulphate, or SBS, is another premium paperboard grade frequently used where purity, appearance and printing quality are important.

SBS generally offers:

• high whiteness

• excellent printing performance

• good surface uniformity

• strong structural properties

• premium visual presentation

Typical applications include:

• premium food cartons

• frozen food packaging

• pharmaceutical packaging

• cosmetics

• luxury retail packaging

The decision between SBS and FBB should consider not only appearance but also stiffness, cost, converting requirements and the intended packaging format.

Cupstock and Food-Service Paperboard

Applications such as cups, bowls and formed food containers require more specialised paperboard structures.

Cupstock paperboard is designed to perform during:

• forming

• side-seam sealing

• bottom sealing

• rim forming

• filling

• transportation

• use with hot or cold liquids

Untreated paperboard alone cannot normally provide sufficient resistance to liquids.

For this reason, cupstock typically requires a functional barrier.

Traditional solutions have relied heavily on polyethylene coatings. Today, packaging producers and converters are increasingly evaluating alternatives such as:

• aqueous barrier coatings

• dispersion coatings

• specialised polymer systems

• bio-based barrier systems

• reduced-plastic structures

• non-LDPE coatings

The barrier must provide the required functionality while maintaining reliable converting performance.

Barrier Performance Must Match the Food

Barrier performance is one of the most important considerations when choosing food-grade paperboard.

Different food products create different technical requirements.

Grease Resistance

Products such as burgers, fries, pastries and other oily foods can transfer fats into untreated paper.

Suitable packaging may therefore require:

• grease-resistant coatings

• specialised surface treatments

• barrier papers

• coated paperboard structures

The required grease resistance should be matched to the type of food, temperature and contact time.

Moisture Resistance

Salads, chilled products, frozen foods and cold beverages can expose packaging to moisture and condensation.

Without sufficient protection, paperboard may:

• soften

• deform

• lose stiffness

• stain

• delaminate

A suitable moisture barrier helps maintain structural integrity throughout the intended use period.

Liquid Resistance

Soup containers, beverage cups and certain dairy applications require significantly stronger barrier performance.

For these applications, coating integrity and sealing performance become critical.

Heat-Sealing Performance

Many food containers must do more than resist moisture or grease.

They must also seal reliably during industrial production.

Important parameters may include:

• sealing temperature

• dwell time

• sealing pressure

• coating activation

• seal strength

• operating window

A material that performs well during laboratory testing may still behave differently on a high-speed converting line.

For commercial production, barrier materials should therefore be tested under conditions as close as possible to the actual converting process.

Printability and Surface Quality

Food packaging is both a technical structure and an important communication medium.

For branded packaging, the surface of the board must support the required printing and finishing processes.

These may include:

• offset printing

• flexographic printing

• digital printing

• varnishing

• embossing

• foil stamping

• other premium finishing processes

Important surface characteristics include:

• smoothness

• ink holdout

• coating uniformity

• whiteness

• brightness

• colour consistency

Good surface quality contributes directly to print reproduction, shelf presentation and overall brand perception.

Converting Performance Is Critical

The performance of paperboard should never be evaluated only at the mill.

The material must also perform consistently throughout the converting process.

Die Cutting

The board should cut cleanly without excessive fibre pull, cracking or edge damage.

Creasing

The material should form precise crease lines without surface failure.

Folding

Poor folding behaviour may result in cracking, whitening, delamination or unacceptable visual defects.

Gluing

Coatings and surface treatments must remain compatible with the intended adhesive system.

Forming

For bowls, cups and trays, the paperboard must tolerate mechanical forming without losing structural integrity.

High-Speed Production

Variations in caliper, moisture, stiffness or coating behaviour can affect machine speed and production efficiency.

For high-volume applications, reliable converting performance can be more valuable than a small reduction in the purchase price of the raw material.

The Cheapest Board Is Not Always the Lowest-Cost Board

Paperboard purchasing decisions are often based heavily on price per tonne.

However, the lowest-priced board may not create the lowest finished-packaging cost.

A cheaper material can result in:

• higher converting waste

• slower machine speeds

• sealing failures

• increased rejection rates

• printing problems

• inconsistent finished products

• customer complaints

The more meaningful commercial measure is therefore:

Total converted cost per acceptable finished package.

This considers both the raw-material cost and the efficiency of the converting process.

Food-Contact Compliance

Paper and board intended for food packaging must comply with the requirements applicable to the target market and the intended use.

Depending on the material structure and application, documentation may include:

• food-contact declarations

• migration testing

• technical specifications

• coating composition information

• heavy-metal declarations

• PFAS-related documentation where applicable

• sensory testing

• good manufacturing practice documentation

Requirements can vary depending on:

• country

• food type

• contact temperature

• contact duration

• direct or indirect food contact

Claims such as food safe, recyclable, compostable, plastic-free or PE-free should therefore be supported by appropriate technical evidence.

Sustainability Is More Than Removing Plastic

Sustainable packaging development is more complex than simply replacing one material with another.

Moving from plastic to paper does not automatically create the best environmental solution.

A complete assessment should consider:

• total material consumption

• fibre source

• virgin or recycled fibre content

• package weight

• barrier chemistry

• recyclability

• repulpability

• manufacturing efficiency

• transport efficiency

• product protection

• food waste prevention

In some applications, a small functional barrier can significantly improve the performance of a predominantly fibre-based package.

The objective should therefore be to use the minimum necessary material structure while still achieving the required technical performance.

Paperboard Requirements by Application

Different packaging formats have different priorities.

Application	Key Material Requirements
Burger boxes	Stiffness, grease resistance, folding performance
Fries cartons	Grease resistance, printability, rigidity
Paper cups	Liquid barrier, sealing, forming, stiffness
Soup bowls	Heat resistance, liquid barrier, sealing
Salad containers	Moisture resistance, rigidity, food contact
Bakery boxes	Printability, folding, grease resistance
Frozen food cartons	Moisture resistance, stiffness, printability
Ice-cream cups	Moisture barrier, low-temperature performance
Confectionery	Print quality, stiffness, visual appearance
Takeaway trays	Formability, grease resistance, structural stability

There is therefore no single "best" paperboard for food packaging.

The correct solution depends on the product, process and finished package requirements.

What Buyers Should Ask Their Paperboard Supplier

Before approving a board for a food-packaging project, buyers should clarify:

• What is the recommended end-use application?

• What are the grammage, caliper and bulk?

• What stiffness values are available?

• What barrier properties does the material provide?

• Is the board suitable for direct food contact?

• Which food-contact documentation is available?

• What coatings are used?

• Is the material heat sealable?

• What sealing temperatures are recommended?

• Is the material suitable for the intended printing method?

• Has it been tested on similar converting machinery?

• What recyclability or repulpability evidence is available?

• What are the storage recommendations?

• What are the MOQ and production lead time?

A professional material evaluation should combine these technical points with commercial and supply-chain considerations.

Choosing the Right Paperboard Is a System Decision

The right paperboard for food packaging cannot be selected by looking at one specification in isolation.

Grammage, stiffness, barrier performance, printing, converting behaviour, food safety and cost all interact.

The best material is therefore not necessarily:

the lightest board,the thickest board,the most expensive board,or the cheapest board.

It is the material that delivers the required performance consistently throughout converting, filling, distribution and final use.

Papironova: From Application to Material Selection

Papironova works with paper and board producers, converters and packaging companies to identify suitable materials for food and beverage packaging applications.

Our approach begins with the final application.

We evaluate the product, packaging format, converting process, barrier requirements, food-contact requirements and commercial parameters before identifying suitable paperboard options.

From FBB and SBS to cupstock and specialised barrier-coated paperboard, the objective is to connect the technical requirement with the appropriate material and supply solution.

Because choosing paperboard should not begin with the question:

"What board is available?"

It should begin with:

"What does the finished package need to achieve?"

If you are developing a new food-packaging structure or evaluating an alternative paperboard grade, Papironova can support the initial material assessment, sourcing and supplier-development process.