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Biodegradable Plastic Alternative from Seaweed Hits Commercial Scale

A startup has begun commercial production of a seaweed-based packaging material that fully biodegrades in soil within weeks, offering a genuine alternative to single-use plastics.

RBN Editorial6 June 2026
Biodegradable Plastic Alternative from Seaweed Hits Commercial Scale

From Ocean to Packaging

A startup has begun commercial-scale production of a biodegradable packaging material derived from seaweed. The material, which looks and performs like conventional plastic film, fully biodegrades in soil within six weeks and in ocean water within three months.

How It's Made

The process extracts polymers from fast-growing seaweed species, which can be cultivated without freshwater, fertiliser, or arable land. Seaweed farms also sequester carbon and provide habitat for marine life, giving the raw material a negative carbon footprint.

The Market Opportunity

Single-use plastic packaging is a $400 billion global market, and brands are under enormous regulatory and consumer pressure to find alternatives. The startup has already signed supply agreements with several major food and personal care brands.

Scaling Challenges

While the technology works, scaling production to displace meaningful volumes of plastic will require significant investment in seaweed cultivation infrastructure. The company is building its first large-scale seaweed farm and partnering with coastal communities to create a sustainable supply chain.

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