MDO-PE (MOPE) explained: the film that makes all-PE pouches possible
Machine-direction oriented polyethylene gives PE the stiffness and print quality of PET, so you can build pouches from a single, recyclable polymer.
Read articlePolylactic acid (PLA) is the compostable film most brands ask about first. It is clear, stiff and prints well, but it is not a drop-in replacement for PET or BOPP. Here is a practical view of where it fits.
What PLA is
PLA is made by fermenting plant sugars, typically from corn or sugarcane, into lactic acid, which is then polymerised into resin and processed into film. It is bio-based and, under the right conditions, industrially compostable.
Strengths
- Clarity and gloss similar to conventional clear films, which is good for window packs.
- Stiffness that helps packs stand and run on machines.
- Printability: PLA takes print and can be laminated to paper and other compostable layers.
- Renewable feedstock, which supports carbon-reduction goals.
Limitations to plan for
- Moisture barrier is much weaker than PE, PP or metallised films, so PLA alone is not enough for moisture-sensitive products.
- Heat sensitivity: PLA softens at relatively low temperatures, so storage, transport and sealing need care, especially in Indian summers.
- Brittleness: unmodified PLA can crack at folds and corners. It is often blended with other compostable polymers such as PBAT for toughness.
- End of life: PLA needs industrial composting conditions. It will not break down quickly in soil or a home compost heap.
Typical compostable structures
- Paper / PLA for dry goods where a paper look is wanted.
- PLA / compostable sealant (often PBAT-based blends) for clear or window pouches.
- Cellulose / PLA combinations where more barrier is needed.
Every layer, including inks and adhesives, has to be compostable for the whole pack to qualify.
Is PLA right for your product?
Ask three questions: how sensitive is the product to moisture and oxygen, how long does it need to last, and where will the pack end up? Dry products with short to medium shelf life are the best fit.
How we can help
We can trial PLA-based and other compostable structures on your product and filling line. Get in touch to plan a trial.
