No — compostable bags and biodegradable bags are not the same, even though many people confuse the two. The terms describe very different environmental behaviors and standards.
1. Biodegradable Bags
Biodegradable bags are made from materials that can break down naturally over time through the action of microorganisms (bacteria, fungi).
However:
There is no fixed timeframe for biodegradation. It could take months or many years.
Some biodegradable plastics are still petroleum-based, meaning they may only break into smaller fragments (microplastics).
Biodegradable does not require industrial composting or certified conditions.
Biodegradable ≠ guaranteed environmentally safe.
2. Compostable Bags
Compostable bags must break down into non-toxic, organic matter (water, CO₂, biomass) within a controlled period.
They must meet certification standards such as:
• EN 13432 (EU)
• ASTM D6400 / D6868 (USA)
• AS 4736 (Australia)
Key features of compostable bags:
Made from plant-based materials (PLA, cornstarch, PBAT blends).
Decompose fully in a composting environment (industrial or home composting, depending on certification).
Leave no harmful residue or microplastics.
Compostable = biodegradable, but only under specific conditions and with certifications.
Key Differences at a Glance
| Feature | Biodegradable Bags | Compostable Bags |
|---|---|---|
| Material | Can be petroleum-based or plant-based | Plant-based certified materials |
| Breakdown Time | Undefined | Strict timeframe (e.g., 180 days in industrial composting) |
| End Residue | May leave microplastics | Turns into organic matter with no toxins |
| Certifications | Not required | Required (EN 13432, ASTM D6400, etc.) |
| Environmental Safety | Varies; not always eco-friendly | Safe and verifiable |
All compostable bags are biodegradable, but not all biodegradable bags are compostable. If your business focuses on eco-friendly packaging, compostable bags provide clearer environmental benefits and recognized certifications that buyers trust. Contact us to purchase environmentally friendly biodegradable compostable bags.
