Technology hub
PLA is the bioplastic most compostable packaging is built on, but it is one of several, and “compostable” is conditional. This hub is the entity anchor for PLA across the ECS library: what PLA is, how it compares to PHA and starch blends, the compostability standards that govern it, and how to source bioplastic resin on spec instead of on a marketing claim.
- ASTM D6400 / EN 13432
- PLA vs PHA vs starch blends
- Industrial vs home compostable
- Food-contact and EPR aware
In this hub
Start here
What PLA actually is.
PLA, or polylactic acid, is a bioplastic polymerized from lactic acid, which is usually fermented from plant sugars such as corn or sugarcane. It is rigid and clear, behaves like a conventional plastic at room temperature, and is certified compostable under industrial conditions. That combination is why PLA is the workhorse of compostable foodservice and packaging: it looks and feels like the plastic it replaces, but it carries a tested end-of-life claim.
The two things buyers most often get wrong about PLA are heat and disposal. PLA softens with heat, so a PLA cold cup is not a hot cup. And PLA is industrially compostable, not home compostable, so the certification has to match the disposal environment your operation or your customers actually have. Both of those are spec decisions, which is why the material question and the certification question travel together.
The bioplastic family
PLA versus PHA versus starch blends.
No single bioplastic wins every application. Pick by the format, the heat exposure, and the disposal environment.
The workhorse
PLA
Rigid, clear, industrially compostable. Ideal for cold cups, clamshells, and rigid formats where clarity matters. Softens with heat, so it is not for hot liquids without crystallization (CPLA).
- Industrially compostable, ASTM D6400
- Clear and rigid at room temperature
- CPLA variant for heat-tolerant cutlery and lids
- Lowest cost of the three at volume
The premium
PHA
Microbial-fermentation polyester that tolerates more heat and can be home- and marine-compostable in some grades. The premium option when the disposal environment or heat exposure rules out PLA.
- Higher heat tolerance than PLA
- Home and marine compostable in some grades
- Higher cost per kilogram
- Used as a bio-lining for hot-cup paper
The blend
Starch blends
Thermoplastic starch blended with other biopolymers for flexible films, mailers, and bags. Often positioned as a drop-in, but the blend ratio and certification vary widely between suppliers.
- Flexible films, mailers, and bags
- Blend ratio drives properties and claim
- Certification varies by supplier
- Compare multiple vendors on spec
The standards that govern it
Compostability is a certificate, not an adjective.
A credible compostable claim names the standard and the body, and the certification matches the disposal environment. “Biodegradable” alone does not survive a procurement review.
ASTM D6400
Industrial compostable, US
The North American standard for industrial-compostable plastics. ASTM D6868 covers compostable coatings on paper, which is how a compostable hot cup is certified.
EN 13432
Industrial compostable, EU
The European industrial-compostability standard, underlying the OK Compost INDUSTRIAL mark and the EU recognition of a compostable claim.
BPI / CMA
North American certification bodies
BPI and CMA certify products to the compostability standards and are the marks North American commercial composters recognize on the bin.
OK Compost
Industrial vs home tiers
OK Compost certifies to INDUSTRIAL or HOME tiers. The tier has to match the disposal access your customers actually have, or even certified material ends up in landfill.
The guides behind this hub
The bioplastic guide library.
From the terminology to the supplier comparison to sourcing resin at volume, all anchored back to this hub.
Terminology
Biodegradable vs Compostable vs PCR vs PHA
What each bioplastic term legally means, which certification backs it, and where each material fits.
Certification
ASTM D6400 vs OK Compost vs BPI vs CMA
The 2026 compostable certification decoder: what each certificate proves and which one your bid needs.
Suppliers
Starch-Based Bioplastic Suppliers Compared
How to evaluate BioLogiQ, Novamont, Plantic, and Roquette on spec rather than on the brand term.
Material choice
PCR vs Bio-Based Resin
A buyer’s guide for packaging procurement under EPR, weighing recycled content against bio-based resin.
B2B sourcing
Bulk Bioplastic Resin Sourcing Guide
PLA, PHA, and starch blends at volume: spec checklist, certification decoder, and EPR-aware selection.
Foodservice
Compostable Foodservice Spec Cheat Sheet
Format-by-format spec for clamshells, cups, lids, and cutlery, with the PFAS and heat rules that gate each.
Small brands
Compostable Packaging for Small Brands
How to choose without overpaying or greenwashing, with low-MOQ formats and the claims that hold up.
Carbon-negative
Carbon-Negative Biochar-Composite Packaging
How a biochar-PLA composite is both certified-compostable and carbon-negative with a verified removal credit.
Where PLA shows up
The pillars this material feeds.
How ECS sources bioplastic resin.
ECS is a vendor-neutral routing desk. We translate your format and end-of-life requirement into a resin spec, run the RFQ across PLA, PHA, and starch-blend suppliers, verify the compostability certification against the disposal environment, and flag the EPR fee impact for your markets. We split a marketing claim from a certificate number and carry only the latter into your shortlist.
- End-of-life claim matched to the disposal environment.
- Food-contact and migration data where the use requires it.
- EPR fee impact flagged for your state and EU footprint.
Ready to source
Spec the resin, get bids you can compare.
Tell us the format, the heat exposure, the disposal environment, and your markets. We run a controlled RFQ across PLA, PHA, and starch-blend suppliers and return comparable, certification-verified bids.
Questions buyers ask
PLA bioplastic, frequently asked.
What is PLA?
PLA (polylactic acid) is a bioplastic polymerized from lactic acid, usually fermented from plant sugars such as corn or sugarcane. It is rigid and clear, behaves like a conventional plastic at room temperature, and is certified compostable in industrial conditions, which is why it is the workhorse of compostable foodservice and packaging.
What is the difference between PLA and PHA?
PLA is industrially compostable and softens with heat, making it ideal for cold cups and rigid clear formats. PHA is produced by microbial fermentation, tolerates more heat, and can be home- and marine-compostable in some grades, but it costs more. The application decides which one, and the certification has to match the disposal environment.
Is PLA the same as biodegradable plastic?
No. PLA is certified compostable under industrial conditions, which is a specific, tested claim. Biodegradable is a vaguer term with no single standard behind it. A credible claim names the standard (ASTM D6400, EN 13432) and the certification body, not just the word biodegradable.
How do I source PLA or bioplastic resin at volume?
Specify the format and mechanical targets, the end-of-life certification you need (and the disposal environment it must match), food-contact compliance where required, and the EPR fee impact for your markets. ECS runs a spec-controlled RFQ across PLA, PHA, and starch-blend suppliers and returns comparable bids.