Many people use the words biodegradable and compostable as if they mean the same thing. In reality, they are related but not identical. For packaging manufacturers, importers, and brand owners, understanding biodegradable vs compostable is very important before choosing a material.
A product may be biodegradable, compostable, both, or neither, depending on the material and the conditions in which it breaks down. That is why buyers should compare different biodegradable raw materials carefully instead of depending on broad marketing claims.
What does biodegradable mean?
Biodegradable means a material can be broken down by microorganisms over time into simpler natural substances. This usually happens through biological activity involving bacteria, fungi, and other microbes.
However, the word biodegradable by itself does not always explain:
- how long the breakdown takes
- under what temperature or humidity
- whether it leaves residues
- whether it needs industrial composting
- whether it is suitable for home composting
Because of that, biodegradable is a broader term and can sometimes be too general if not supported by technical details.
What does compostable mean?
Compostable means a material is designed to break down under composting conditions into natural elements such as water, carbon dioxide, and biomass without leaving harmful residue, depending on the standard and test conditions.
Compostable is usually a more specific term than biodegradable because it often relates to defined composting environments and recognized certification standards.
In commercial packaging, compostable claims are often connected with industrial composting systems and testing criteria.
Are biodegradable and compostable the same?
No, they are not the same.
All compostable materials are generally intended to biodegrade under composting conditions, but not all biodegradable materials are compostable in a recognized or practical way.
This is the easiest way to remember it:
- biodegradable = broader word
- compostable = more specific word
A material may biodegrade eventually, but if it does not break down within the required time and conditions of a composting standard, it may not qualify as compostable.
Why compostable is more specific
Compostable materials are usually expected to meet stricter conditions. In packaging and materials sourcing, this matters because businesses often need clear evidence when making environmental claims.
A compostable packaging material is usually evaluated based on things such as:
- disintegration
- biodegradation
- biodegradation
- compost quality
- heavy metal limits
- safety for composting systems
This is why certification and standard-based language are important.
Industrial composting vs home composting
One of the biggest mistakes buyers make is assuming that all compostable materials behave the same way everywhere.
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Industrial composting
Industrial composting usually involves controlled systems with higher temperature, moisture, oxygen, and microbial activity. Many compostable packaging materials are designed for these conditions.
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Home composting
Home composting conditions are usually less controlled and often slower. A material that is industrially compostable should not automatically be described as home compostable unless it is specifically designed and verified for that environment.This difference is very important when choosing packaging material for international markets.
Why certification matters
Certification helps buyers understand whether a claim is supported by recognized testing. This is especially important in B2B sourcing because it reduces confusion and improves trust.
Instead of relying on general words only, buyers should ask:
- does the material have relevant certification support?
- what exact standard applies?
- does the claim apply to the grade or only to a formulation?
- does the final product also need testing?
Common buyer mistakes
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Using biodegradable and compostable as interchangeable words
This can create technical confusion and possible compliance problems.
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Assuming all plant-based materials are compostable
A material being plant-based does not automatically mean it is compostable.
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Ignoring disposal conditions
The end-of-life route matters. A material must be selected based on real waste-management conditions in the target market.
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Not checking the final application
A material may sound sustainable, but it still must meet packaging performance, processing, and customer expectations.
Materials often used in compostable packaging
Common materials used in biodegradable and compostable packaging development include:
- PLA
- PBAT
- PHA
- starch-based compounds
- blend systems using more than one polymer
For rigid packaging, PLA pellets for sustainable packaging may be suitable in many cases. For flexible bags and film, biodegradable PBAT is often part of the formulation. Some projects may also use PHA or starch blends depending on the product and performance target.
Which should you choose: biodegradable or compostable?
The correct answer depends on your product and market.
You should consider:
- the product type
- packaging format
- export market rules
- disposal route
- customer claim requirements
- material performance
- certification needs
If your project requires a more specific environmental claim tied to composting systems, compostable language may be more relevant. If your project is still in early material evaluation, biodegradable may be used more broadly, but always with care and technical accuracy.
Why this matters for packaging buyers
Using the wrong term can lead to:
- customer confusion
- weak marketing claims
- compliance risk
- wrong material selection
- performance mismatch
That is why material education is important before a product is launched.
Why choose Samcome
At Samcome, we work with businesses that need practical sustainable material solutions for packaging and manufacturing. Our product range includes PLA, PBAT, PHA, starch-based materials, and compound blends designed for different applications.
If you are not sure which type of material is right for your product, you can request a quote and discuss your requirements with our team.
Conclusion
The difference between biodegradable and compostable is simple once you understand the basics. Biodegradable is a broad term that refers to breakdown by biological activity, while compostable is more specific and usually connected to defined composting conditions and standards.
For packaging and manufacturing buyers, the best approach is to choose materials based on application, disposal route, certification needs, and performance requirements.
Request a quote
Tell us your target product (film/bags, trays, injection parts), and we’ll recommend a suitable grade and provide a quotation.
FAQs "Frequently Asked Questions"?
Is biodegradable the same as compostable?
No. Compostable is more specific, while biodegradable is a broader term.
Are all compostable materials biodegradable?
They are generally intended to biodegrade under composting conditions, but compostable claims depend on specific standards and requirements.
Can biodegradable plastic go in compost?
Not always. It depends on the material, the composting system, and whether the material is suitable for composting conditions.
What materials are used in compostable packaging?
Common materials include PLA, PBAT, PHA, starch-based compounds, and blend systems.
Why do buyers need to know the difference?
Because the wrong term can lead to incorrect material choice, poor claims, and market confusion.
