# PHA bioplastics: Overview

Straws and coatings that vanish in the sea

Source page: https://www.materialinsights.org/chemicals/pha/overview/

What this tab covers What the chemical is, how big its market is, what it is used for (with shares, volumes, why it wins and what could replace it), and its chain from raw material to end user. Ends with three things to remember.

Polyhydroxyalkanoates (PHA) are polyesters that bacteria store as energy reserves when fed sugar, plant oil or waste. Harvested and purified, they make films, straws, coatings and moulded parts that biodegrade in soil, home compost and seawater, which PLA does not. Production is tiny, a small fraction of 2.31 Mt of bioplastics capacity (European Bioplastics, 2025), and costly. The sector's record is sobering: Danimer Scientific, once valued as a leader, filed for bankruptcy in March 2025 with $402 million of debt and sold for $19 million. CJ Biomaterials and Kaneka are now the main producers.
 Volume not published; tens of kt a year of nameplate capacity (indicative), within 2.31 Mt of bioplastics capacity (2025) Market value not published in sources reached; a few hundred million dollars (indicative) Growth European Bioplastics names PHA among the materials driving growth to 4.69 Mt of bioplastics capacity by 2030 European Bioplastics Market Data 2025; volume and value indicative

#### Key uses

| Use | Share | Annual volume | Why this commodity | Alternatives |
|---|---|---|---|---|
| **Food service ware (straws, cutlery, cups, lids)** | 35% | not publishedbasis | PHA degrades in home compost and seawater, which helps brands meet single-use plastic bans without relying on industrial composting. CJ Biomaterials' PHA compound straws are used by Tous les Jours in the US (Plastics Today, 2025). Plastics Today, Jun 2025; share indicative | Paper PLA Reusables |
| **Flexible packaging and paper coatings** | 30% | not publishedbasis | PHA coatings replace PE linings in paper cups and wrappers so the item can be composted or repulped; CJ and Pregis co-developed a compostable frozen-food film (Plastics Today). Plastics Today, Jun 2025; share indicative | PE-lined paper PBAT/PLA films Aqueous barrier coatings |
| **Agriculture and horticulture (mulch films, plant clips, controlled-release coatings)** | 15% | not publishedbasis | Soil-biodegradable items can be left in the field. indicative | PBAT mulch film PE film collected |
| **Medical and cosmetics (sutures, implants, microbead replacement)** | 10% | not publishedbasis | Biocompatible and resorbable; high price per kg is tolerable. indicative | PLA and PGA Cellulose beads |
| **Blends with PLA and PBAT, other moulded goods** | 10% | not publishedbasis | Amorphous PHA toughens PLA and speeds its biodegradation. Plastics Today 2025 (aPHA/scPHA compounds); indicative | Other tougheners |

 No public volume or use split for PHA. Shares are indicative; volumes are not published.

#### From raw material to user

1. **Feedstock** Sugar (CJ), plant oils such as canola (Danimer, indicative) or vegetable oils (Kaneka, indicative), or waste oils and methane.
2. **Fermentation** Bacteria grow, then are starved of a nutrient so they fill with PHA, often 60-80% of cell weight (indicative).
3. **Recovery** Cells are broken and PHA extracted with solvents or by digestion of the cell mass, a costly step.
4. **Compounding** PHA is blended with additives or with PLA and PBAT into grades for film, moulding and coating.
5. **End of life** Biodegrades in industrial and home compost, soil and seawater (certification dependent).

#### Made from (commodity table)
[Rs Rapeseed](https://www.materialinsights.org/commodities/rapeseed/)[Su Sugar](https://www.materialinsights.org/commodities/sugar/)

#### Three things to know

- Danimer Scientific filed for Chapter 11 on 18 March 2025 with $402 million of funded debt and sold to Teknor Apex for $19 million (bioplastics MAGAZINE; Elevenflo).
- Yield10 Bioscience also went bankrupt in December 2024, three months before Danimer (Plastics Today).
- PHA costs several times fossil PE (indicative), so it survives only in uses where marine or soil biodegradability is worth paying for.

#### Read the tabs
[Production route](https://www.materialinsights.org/chemicals/pha/routes/)[Production](https://www.materialinsights.org/chemicals/pha/production/)[Feedstocks](https://www.materialinsights.org/chemicals/pha/feedstocks/)[Cycles](https://www.materialinsights.org/chemicals/pha/cycles/)[Trading](https://www.materialinsights.org/chemicals/pha/trading/)[Movement](https://www.materialinsights.org/chemicals/pha/movement/)[Regulation](https://www.materialinsights.org/chemicals/pha/regulation/)[Characteristics](https://www.materialinsights.org/chemicals/pha/characteristics/)[Emissions](https://www.materialinsights.org/chemicals/pha/emissions/)

## Other sections

- [Summary](https://www.materialinsights.org/chemicals/pha/index.md)
- [Correlation](https://www.materialinsights.org/chemicals/pha/correlation/index.md)
- [Production route](https://www.materialinsights.org/chemicals/pha/routes/index.md)
- [Production](https://www.materialinsights.org/chemicals/pha/production/index.md)
- [Feedstocks](https://www.materialinsights.org/chemicals/pha/feedstocks/index.md)
- [Cycles](https://www.materialinsights.org/chemicals/pha/cycles/index.md)
- [Trading](https://www.materialinsights.org/chemicals/pha/trading/index.md)
- [Movement](https://www.materialinsights.org/chemicals/pha/movement/index.md)
- [Regulation](https://www.materialinsights.org/chemicals/pha/regulation/index.md)
- [Characteristics](https://www.materialinsights.org/chemicals/pha/characteristics/index.md)
- [Emissions](https://www.materialinsights.org/chemicals/pha/emissions/index.md)
- [Relationships](https://www.materialinsights.org/chemicals/pha/links/index.md)