What Materials Replace Plastic in Sustainable Packaging?

March 18, 2026

What Materials Replace Plastic in Sustainable Packaging?

What are the main alternatives to plastic in sustainable packaging?

The main alternatives to plastic in packaging include cardboard and paperboard, plant-based bioplastics, compostable materials such as PLA and starch-based films, recycled paper and fiber, glass, aluminum, and bio-based materials made from agricultural waste.

Cardboard and fiber-based materials are the most widely used plastic alternatives on the market. They are easy to recycle and have a much lower impact on the environment. These materials can be made to protect food similarly to plastic while keeping the strength needed for food packaging. Plant-based bioplastics, made from corn starch, sugarcane, or other renewable resources, offer another promising option, though they require specific industrial composting conditions to break down properly.

Compostable materials are a growing area, with PLA (polylactic acid) and starch-based films becoming more common in food service. These materials break down under the right industrial composting conditions, but the most practical and scalable alternatives remain fiber-based solutions that combine recycled content with minimal plastic components to achieve both functionality and reduced plastic use.

How do cardboard and fiber-based materials compare to plastic packaging?

Cardboard and fiber-based materials offer clear benefits compared to plastic packaging, with at least 85% less plastic content compared to an equivalent fully plastic pack, better recyclability, and significantly lower CO2 emissions due to their renewable and recycled raw material origins. However, they have traditionally required trade-offs in how well they block moisture and gases.

Modern fiber-based packaging has largely overcome these challenges through new manufacturing methods. Advanced cardboard packaging can now protect food from gases effectively while still being recyclable. The key difference is in the materials used: traditional plastic packaging is made entirely from petroleum-based polymers, whereas fiber-based alternatives use mainly recycled paper fibers, with minimal plastic only where needed for food safety.

Well-designed fiber-based packaging can match plastic for keeping food fresh and maintaining its shape, while being easier to dispose of responsibly. Unlike plastic packaging, which can take centuries to break down, cardboard packaging breaks down naturally and fits into the recycling systems that consumers already know and use.

Which sustainable materials work best for food packaging?

For food packaging, recyclable fiber-based materials with minimal plastic content offer the best balance of food safety, keeping food fresh, and reducing plastic use. These materials must meet strict food-grade requirements while protecting food from oxygen and moisture.

The most effective sustainable food packaging materials combine recycled paperboard with food-safe protective coatings that use significantly less plastic than traditional alternatives. This keeps perishable foods protected while ensuring the packaging can be recycled through standard paper recycling. Materials such as FSC-certified paperboard with water-based coatings work particularly well for dry goods and ready meals.

All trays are suitable for microwave use and freezing. Oven resistance is not a general feature of fiber-based packaging — it depends on the material and product type selected. For example, Jospak Uunivuoka is specifically designed to withstand oven temperatures. The key is selecting materials that have been specifically designed for food contact, with appropriate certifications such as BRC food safety standards, ensuring both reduced plastic use and regulatory requirements are met.

What makes a packaging material truly sustainable?

A truly sustainable packaging material must be recyclable, use renewable or recycled raw materials rather than fossil-based ones, reduce plastic use throughout its life, and keep food safe and fresh. Sustainability means looking at the full picture, from raw materials to disposal.

The most important factor is what happens to the packaging at the end of its life: sustainable materials must fit into existing waste management systems without requiring new equipment or facilities. This means materials should work with current recycling processes and be easy for consumers to identify and sort. Sustainable packaging should also use high amounts of recycled content, reducing the need for new raw materials and supporting a circular economy.

Raw material origin is another key measure. Materials derived from renewable sources rather than fossil-based polymers produce measurably lower CO2 emissions throughout production, transportation, and disposal. The material should also be manufactured using renewable energy and should minimize water use and chemical treatments that could harm the environment.

How much plastic can sustainable alternatives actually replace?

Current sustainable packaging alternatives can replace up to 90% of plastic content in many food packaging applications compared to an equivalent fully plastic pack, while maintaining equivalent functionality in protecting food, keeping it fresh, and meeting food safety requirements. The remaining plastic content serves critical functions for food-contact safety and moisture protection.

In practice, fiber-based solutions have successfully replaced most of the plastic in food trays, containers, and protective packaging. The key development has been creating materials that combine recycled fiber content — at least 85% or more compared to a fully plastic equivalent — with minimal but carefully placed plastic components. This approach dramatically reduces plastic use without losing the properties that food manufacturers need.

The amount of plastic that can be replaced varies by application, with ready meals, fresh produce, and prepared foods showing the highest success rates for plastic reduction. Manufacturers are finding that recyclable fiber-based packaging solutions can meet their plastic reduction targets while keeping their production lines running efficiently. As manufacturing technologies continue to improve, the share of plastic that can be replaced is expected to grow further in the coming years.

Pohditko vielä, mikä pakkausratkaisu sopisi parhaiten sinun tuotteellesi? Ota yhteyttä, niin autamme valitsemaan vaatimukset täyttävän ja kestävän materiaalin juuri sinun tarpeisiisi.

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