Thermoforming Film Packaging: A Complete Guide for Food Manufacturers

For food manufacturers, choosing a thermoforming film is not simply a matter of selecting a film thickness. The packaging must form consistently on the production line, seal reliably, withstand handling and distribution, provide the required oxygen and moisture barrier, and comply with food-contact requirements in the destination market.

This guide explains how thermoforming film packaging works, which materials are commonly used, what specifications matter most, and what food processors should verify before approving a packaging supplier.

Quick Answer:

Thermoforming film packaging uses a formable bottom web that is heated and shaped into cavities, filled with food, and sealed with a top web. For food applications, common structures combine materials such as PE, PA and EVOH to balance sealing, puncture resistance, forming performance and barrier protection. The correct structure depends on the food, shelf-life target, processing temperature, package depth and thermoforming equipment.

What Is Thermoforming Film Packaging?

Thermoforming packaging is an automated packaging format in which a roll-fed bottom film is heated and drawn into a mold to create a tray or pocket. The food product is placed into the formed cavity before a top film is sealed over it.

Depending on the equipment and product, the pack may then be vacuumed, gas flushed, skin packed or sealed under another specified atmosphere.

Unlike premade trays or pouches, thermoforming systems form the package directly on the packaging line. This can make them attractive for high-volume food production because forming, filling and sealing are integrated into one continuous process.

Typical applications include:

• Fresh and processed meat

• Poultry

• Sausages and deli products

• Seafood

• Cheese

• Ready meals

• Frozen foods

• Bakery and prepared foods

• Portion-packed ingredients

How Does Thermoforming Film Packaging Work?

A typical thermoforming line follows five basic stages:

1. Film heating and forming

The bottom web is heated to a controlled temperature and formed into cavities using vacuum, air pressure or a combination of forming methods.

2. Product loading

Food is placed manually or automatically into the formed pockets.

3. Atmosphere control

Depending on the application, air may be removed or replaced with a selected gas mixture.

4. Top-web sealing

A lidding film is sealed to the formed bottom web.

5. Cutting and discharge

Individual packages are cut from the web and transferred for inspection, labeling, case packing or further processing.

The films therefore need to do more than protect the food after packaging. They must also perform correctly during heating, stretching, sealing and cutting.

What Materials Are Used in Thermoforming Film?

Food thermoforming structures are commonly multilayer materials because one polymer rarely provides every required property.

Which Properties Matter Most When Choosing Thermoforming Film?

1. Forming Depth and Film Distribution

A film that works for a shallow cheese pack may not perform correctly when drawn into a deep meat package.

2. Oxygen Barrier

Oxygen exposure can contribute to oxidation, color change and quality deterioration in oxygen-sensitive foods.

3. Moisture Barrier

Moisture transmission can affect weight loss, texture and overall product quality.

Foods with significant moisture content or products vulnerable to dehydration may require stronger water-vapor protection.

4. Puncture and Abuse Resistance

Sharp bones, shell edges, frozen products and irregular food shapes can place significant mechanical stress on the package.

5. Seal Performance

A high-performance barrier structure still fails if the seal is unreliable.

Thermoforming films should have a suitable sealing window for the equipment and production conditions.

6. Transparency and Presentation

For retail products, clarity can be commercially important because the consumer often sees the food directly through the packaging.

Thermoforming Film vs. Vacuum Bags: Which Is Better?

Neither format is universally better.

For large, repeatable production runs, thermoforming can provide significant processing advantages. For smaller batches or frequent SKU changes, premade vacuum packaging may offer more operational flexibility.

FAQ About Thermoforming Film Packaging

What is the best film for thermoforming food packaging?

There is no single best structure. PA/PE is commonly considered when strength, forming and sealing are priorities, while EVOH may be added when higher oxygen protection is required. The final structure should be matched to the food, machine, shelf life and storage conditions.

What thickness should thermoforming film be?

Thickness depends on cavity depth, product weight, puncture risk, equipment and required mechanical performance. Film should be specified according to the application rather than selected from a universal thickness range.

Can thermoforming film be used for frozen food?

Yes, provided the selected structure maintains seal integrity and mechanical performance at the intended freezing and distribution temperatures. Frozen products may require additional puncture and flex-crack resistance.

Is thermoforming film suitable for vacuum packaging?

Yes. Thermoforming systems are widely used for vacuum-packed foods including meat, processed meat, cheese and seafood.

Can thermoforming packaging be recyclable?

Potential recyclability depends on the complete material structure and the applicable collection, sorting and recycling system. Manufacturers developing recyclable thermoforming packaging should evaluate the entire structure rather than assuming that reducing the number of layers alone makes the package recyclable.

What information should I send when requesting a thermoforming film quotation?

Provide the food type, package dimensions, forming depth, machine model, current film structure or sample, storage conditions, shelf-life target, packaging atmosphere, destination market and estimated volume. This allows the supplier to recommend a structure instead of simply quoting a generic film.

Need a Thermoforming Film for Your Food Packaging Line?

BioPack develops custom thermoforming film packaging solutions for food processors, including structures for meat, seafood, cheese, frozen foods and other vacuum or barrier-packaging applications.

Request a Thermoforming Film Sample or Packaging Evaluation Now!