MATERIALS / SEAWEED

Seaweed-based packaging.
Start with the format.

Explore seaweed-based coatings, coated kraft paper and transparent packaging films. Start with your format, then match the barrier to the contents, contact time and storage conditions. Seaweed paper and bioplastic pellets follow separate development routes.

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Seaweed-based coating applied to kraft paper packaging
COATINGS & COATED KRAFT PAPERSelect the format for your packaging process
Format selectionCoating, coated paper, film or development feedstockApplication reviewBarrier, processing and contact requirementsClear development statusPaper and pellets remain R&D enquiries

FORMAT & AVAILABILITY

Four material offers.
Different starting points.

Start with the format your process needs. A coating formulation, a coated paper sheet and a finished film require different specifications and qualification steps.

01Seaweed-based coating being brushed onto kraft paper

COATING FORMULATION / COATED SHEETS

Coatings & coated kraft paper

Project qualification

Seaweed-based coating for paper and board, or ready-coated kraft paper sheets. Define the substrate and barrier requirements, and request food-contact documentation for the selected specification and intended contact conditions.

Explore coatings & coated paper
02Two kraft paper packages with viewing windows made from seaweed-based film

PACKAGING WINDOWS / LISTED OPTIONS 30–70 μm

Transparent window films

Project qualification

Transparent seaweed-based film for windows in paper and board packaging. Start with dry or short-contact applications, then assess clarity, attachment, handling and humidity. Confirm any direct food-contact requirements for the finished package.

Explore the film specification
03Packaging box made from seaweed-based paper with a speckled surface

SEAWEED-CONTAINING PAPER SHEETS

Seaweed paper

Not commercially available · R&D enquiry

Paper sheets incorporating seaweed fibres for packaging, print, labels and tags. This material is distinct from kraft paper with a seaweed coating; R&D sample availability remains to be confirmed.

View paper development
04Cream-coloured seaweed-based bioplastic pellets

DEVELOPMENT-STAGE PELLET FEEDSTOCK

Bioplastic pellets

Not commercially available · R&D enquiry

Seaweed-derived pellet formulations for moulding, extrusion and film projects. Composition and processing requirements are assessed for the selected R&D project; sample availability remains to be confirmed.

View pellet development

Availability, sample conditions, quantities and lead times are confirmed for the selected format and specification. Seaweed paper and bioplastic pellets are not commercially available; R&D sample availability remains to be confirmed.

APPLICATION FIT & BARRIER PERFORMANCE

Match the barrier.
Know the limits.

Seaweed-derived polymers such as alginate can provide grease and oxygen barriers. Formulation, substrate and humidity determine how a particular film or coating performs. Confirm performance for the selected material and finished package.

01

Oil & grease

A useful starting point for coated paper and board. Check resistance to the actual contents, including temperature, contact time and folds in the package.

ASK FORGrease-resistance results for the coated substrate.
02

Oxygen

Selected formulations can slow oxygen transmission. Moisture can change this performance, so results measured in dry conditions may not represent real storage.

ASK FOROxygen transmission rate (OTR), with temperature and humidity.
03

Water & moisture

Many seaweed-derived polymers attract moisture. Surface water repellency, water-vapour resistance and strength during direct wet contact need separate assessment.

ASK FORWater-vapour transmission (WVTR), liquid-contact and wet-strength tests.

Hydrophobic means water-repellent at the surface. It does not, by itself, establish a moisture barrier or show how long a package can hold wet contents.

A FOCUSED STARTING POINT

Windows, wraps & coated paper

Discuss transparent windows for paper boxes, selected dry or short-contact wraps, and grease-barrier coatings for paper or board. Choose the format first and qualify it for your contents and converting process.

Compare the formats

WHEN WATER IS THE MAIN CHALLENGE

Wet contents need a closer look

Warm, moist contents under load, prolonged liquid contact or humid storage require additional evidence. Suitability for thin, perforated pet-waste bags is not established for the listed film. Coatings and other formulations must be assessed separately.

Define your requirements
About these barrier principles

These principles describe material behaviour reported in research. They are not performance specifications for an Ocean Material grade; request the relevant data for the chosen film, coating and finished package.

PRODUCT CATALOGUEBrowse the Seaweed material listingsCollapseShow products
Not sure which material fits?

Tell us about your application and processing requirements. We can help assess the options.

4 products

FROM FORMAT TO FINISHED PACKAGE

Qualify the material
for your package.

Share your substrate or converting process, required barrier performance, sealing conditions, intended contents and target market. We help coordinate specification review, sample enquiries and supporting documentation for the chosen material.

  1. 01

    Format & processing

    Define whether you need a coating formulation, ready-coated sheet, film or development feedstock. Review the substrate, dimensions and converting requirements for that format.

  2. 02

    Performance & food contact

    Request oxygen and water-vapour transmission data with film thickness, temperature and relative humidity. Test wet strength, folds and seals under intended use conditions. Food-contact documentation must match the formulation, contents and contact conditions.

  3. 03

    Composition & end of life

    Review the formulation and evidence relevant to any environmental claim. Bio-based content, biodegradability and compostability are separate characteristics; assess the finished material and intended disposal route.

BEFORE YOU SPECIFY

Your next questions, answered.

Key distinctions for a well-defined material enquiry.

Is seaweed film waterproof or hydrophobic?

Seaweed-based does not automatically mean water-repellent. Many seaweed-derived polymers are hydrophilic: they attract moisture. A surface that repels droplets can still transmit water vapour or lose strength during prolonged wet contact. Review those properties separately for the selected formulation and package.

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Can water resistance be improved?

Hydrophobic components, additional layers or crosslinking can improve resistance in selected formulations. Any change needs to be assessed for oxygen and grease barriers, flexibility, sealing, food contact and end of life. A wax topcoat is a possible development route, not a confirmed feature of the listed films.

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Is seaweed paper the same as coated kraft paper?

No. Seaweed paper incorporates seaweed fibres into a paper material. Coated kraft paper uses a kraft-paper substrate with a seaweed-based coating. Seaweed paper is not currently commercially available; coated kraft paper is evaluated as a separate offer.

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Which formats can I discuss for a packaging project?

Coating formulations, ready-coated kraft paper sheets and flexible films can be assessed against your packaging requirements. Seaweed paper and bioplastic pellets are development-stage enquiries, with sample availability to be confirmed.

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Are all seaweed-based materials compostable or suitable for food contact?

These characteristics require evidence for the selected formulation and intended use. For food contact, review the relevant documents against the package, contents and contact conditions. Compostability must be assessed for the finished material and intended disposal route.

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What quantities and specifications should I provide?

Tell us the required format, substrate or converting process, package dimensions, barrier and sealing requirements, estimated volume, target market and delivery location. Ordering conditions differ between coating material, coated sheets, film and finished packaging.

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LET’S TALK MATERIALS

Tell us what your packaging needs to do.

Format, substrate, barrier and sealing requirements, intended contents, quantity and target market.

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Tell us about your application, specifications and expected volumes.
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