PlantSea

The development of eco-friendly, seaweed based bioplastics and materials

05/11/2026

We make plastic free packaging from a living crop, not a fossil one.
Seaweed is one of the fastest-growing organisms there is. It needs no land, no fresh water and no fertiliser, and it's already rich in the kind of long-chain molecules a polymer is built from. For a feedstock, it's pretty perfect. Would you like to know more?
We're partnering with forward thinking manufacturers now. Get in touch to send us your samples and let's see what we can do together.

04/11/2026

Introducing Fresh Film!

A growing challenge is currently being faced by the food industry: "how can we continue to protect and preserve food while reducing our reliance on conventional plastic packaging?"

Meet Fresh Film. A seaweed-based film being developed as a potential alternative to conventional plastic food packaging. By using seaweed as a renewable, natural polymer, we aim to create a more sustainable approach to food packaging.

That is why we are developing Fresh Film with commercialisation in mind. Our goal is to create a solution that fits into existing food supply chains and supports businesses in meeting their environmental goals

A new approach to food packaging inspired by nature, developed for the future!

03/11/2026

London, Berlin, Tokyo, to name a few, it’s been quite the year for PlantSea, and we’re not done yet!

Join us at UK Packaging Expo 2026, Exhibition Centre Liverpool, 10 to 11 November.

Two days of packaging materials, machinery and the Future Packaging Conference, all under one roof.

Our commercial team will be on stand E8, come and say hello. Registration link in the comments 👇)

29/10/2026

We talk about ourselves a lot here, so let's do something different for a moment.

Who are you, and how did you find PlantSea?

Share your industry and your interest in us below!

28/10/2026

Twenty successful trials, and counting.

Our seaweed-based film has been put to the test, and it keeps proving itself.

We're working with manufacturers who want a soluble film that doesn't start from fossil sources.

Want to be next? Get in touch.

27/10/2026

We had a great visit to London Packaging Week , discovering some exciting innovations and ideas shaping the future of sustainable packaging. 🌱
Now we’re looking forward to UKPackaging Expo in Liverpool on 10–11 November - come and say hello to the PlantSea team at Stand E6!

23/10/2026

🇯🇵 Sushi, seaweed and a typhoon 🌊

We’ve just returned from Japan, where CEO Rhiannon, CTO Alex and Founder's Associate, Catrina, spent time with the partners and suppliers supporting our scale-up.

As we move towards commercial production, having the right international partners alongside us is a key part of getting our seaweed-based film to market at scale.

Between meetings we explored Tokyo, survived a typhoon (!) and ate very well. Of course, there was plenty of seaweed on the menu 🍣

Thank you to the Welsh Government and the embassy team for such a warm welcome, and to Goro for sharing his local knowledge.

We’re home with stronger relationships and real momentum for the next stage.

22/10/2026

Maybe you know the regulations are under review... But what you might not know, is that the replacement already exists.

Our seaweed-based dissolvable film is an alternative to PVOH and works with both powder and liquid formulations.

Requalifying a film is a long process, and brands that move early won't be the ones caught waiting.

What material are you currently creating with? Are you moving toward natural solutions yet?

20/10/2026

What if changing the material changed nothing else?

That's the idea behind PlantSea's seaweed-based polymer for dissolvable film.

It is designed to work within existing film manufacturing processes, giving brands a way to change the polymer used in their film without redesigning the product around it.

14/10/2026

"Why does it have to be made from plastic?"

That's the question we asked when we looked at the wrapping currently used on single-dose, water-soluble products.

Seaweed grows abundantly and naturally in waters all over the world, and we've made it into a film that replaces plastic perfectly.

Address

The Optic Centre, Ffordd William Morgan
Saint Asaph
LL170JD

Website

http://www.plantsea.co.uk/

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