Biodegradable Packaging in Practice: Materials, Market Changes and Real Industry Experience

One common misunderstanding is that biodegradable packaging works like a single "green plastic." In reality, most flexible packaging-whether traditional or biodegradable-relies on multiple material layers.

Packaging has to do more than simply hold a product. It needs to protect food from moisture, prevent oxygen exposure, survive transportation, and still allow clear printing for branding. Achieving all of these properties with one biodegradable polymer is extremely difficult.

For that reason, manufacturers usually design composite structures. These structures combine different materials through lamination or co-extrusion processes. Each layer contributes something different: strength, flexibility, sealing performance, or printability.

Because of this complexity, switching to biodegradable packaging often requires adjustments in production processes as well. Film temperature control, lamination methods, and storage conditions can all be slightly different compared with conventional plastics.

Several biodegradable polymers are now widely used in flexible packaging production. None of them is perfect on its own, which is why combinations are common.

PLA (Polylactic Acid)
PLA is probably the most recognizable biobased plastic used in packaging. It is produced from renewable resources such as corn or cassava starch through fermentation and polymerization processes.

In packaging films, PLA offers good clarity and relatively high stiffness, which is useful for products that benefit from a clean, transparent appearance. However, anyone who has worked with PLA films knows that they can be brittle if used alone.

PBAT (Polybutylene Adipate Terephthalate)
To improve flexibility, PBAT is often introduced into the structure. This polymer behaves more like conventional plastic films and provides better elongation and tear resistance.

Many compostable packaging bags currently available on the market are actually PLA/PBAT blends, which combine rigidity with flexibility.

Other materials in development
In addition to these two common polymers, materials such as PBS and starch-based resins are sometimes used to improve heat resistance or mechanical stability. Material suppliers are continuously experimenting with new formulations in order to improve processing stability and reduce production costs.

Beyond the material science, it is interesting to see how biodegradable packaging is gradually entering everyday products.

Large material producers such as NatureWorks supply PLA-based polymers that are already used in various compostable food containers and packaging films. At the same time, several packaging companies are experimenting with alternative raw materials. One example often discussed in the industry is Notpla, a startup that developed packaging films made from seaweed extracts. Their materials have been used at public events as an alternative to small plastic sachets.

From a manufacturing perspective, adoption is still uneven. Some brands move quickly toward biodegradable materials, while others remain cautious because of cost and performance considerations. In conversations with buyers, price is still one of the biggest concerns. Biodegradable films typically cost more than conventional plastics, although the gap has slowly been narrowing as production volumes increase.

In practice, biodegradable flexible packaging is most often used for products that do not require extremely high barrier performance. Examples include dry foods, coffee packaging, tea bags, and some types of consumer goods.

Coffee brands, in particular, have shown strong interest in compostable packaging over the past few years. Many smaller roasters see sustainable packaging as part of their brand identity, which makes biodegradable bags attractive despite the higher cost.

At the same time, large-scale adoption in certain sectors-such as high-barrier food packaging-still faces technical challenges. Barrier performance, shelf life stability, and recycling compatibility all remain active research topics.

From my perspective, biodegradable composite packaging is not a simple replacement for traditional plastic films, at least not yet. The technology is still evolving, and manufacturers continue to experiment with different material combinations and processing techniques.

However, the overall direction of the industry is quite clear. Environmental regulations, consumer awareness, and brand sustainability strategies are all pushing packaging companies to explore alternatives to conventional plastics.

For packaging manufacturers, the challenge is to balance environmental benefits with real-world performance. As material science continues to improve, biodegradable composite structures will likely become more common in flexible packaging applications.Contact now