IN Brief:
- Kelpi's seaweed-derived coating has cleared the US FDA food contact notification process.
- Approval covers paper and board packaging used with all food types at or below room temperature, including chilled and frozen products.
- The US decision follows Canadian regulatory clearance and allows commercial partners to progress North American packaging applications.
Kelpi has cleared the US Food and Drug Administration’s food contact notification process for its seaweed-derived barrier coating, opening a route to commercial use on paper and board food packaging in the United States.
The approval allows the coating to be used in contact with all food types at or below room temperature, including refrigerated and frozen products. Kelpi says the same clearance also supports packaging for personal care and cosmetics, although food applications place some of the most demanding requirements on barrier performance and material safety.
The Bristol-based company develops coatings from seaweed-derived biomaterials as alternatives to fossil-based plastic layers used on fibre packaging. The objective is to give paper and board resistance to moisture, grease, and gases without relying on the conventional polymer structures that can complicate recycling.
Regulatory clearance changes the development path because food-contact suitability cannot be treated as an assumption once a coating moves from laboratory work into commercial packaging. Converters and food manufacturers need evidence that the material is acceptable for the intended use conditions before it can be specified for packs entering mainstream production.
The US decision follows an earlier Letter of No Objection from Canada’s Bureau of Chemical Safety. Together, the two milestones widen the North American market available to Kelpi and its packaging partners, while leaving the more prosaic engineering questions of coating, converting, sealing, and packing performance to be proven on industrial lines.
Those questions are substantial. Paper and board offer stiffness, printability, and established collection infrastructure in many markets, but untreated fibre does not provide the moisture, oil, oxygen, or heat-seal properties needed by many foods. Barrier coatings fill that gap, yet the chemistry and thickness of those layers can determine whether the finished structure remains easy to recycle.
Kelpi has been working with established packaging groups on that industrialisation step. Amcor has evaluated the company’s seaweed-based coatings for paper and board applications, testing the material as a potential barrier against water, grease, and oxygen. The FDA clearance adds a market-access milestone to that earlier development work.
The distinction between regulatory approval and production readiness is important. A coating can be acceptable for food contact and still fail commercially if it cannot be applied consistently at converting speed, requires excessive drying energy, produces excessive variation in coating weight, or makes downstream forming and sealing unreliable.
Food manufacturers face another set of tests once the material reaches their plants. A revised pack must tolerate filling, lidding or sealing, case packing, palletisation, chilled or frozen distribution, storage, and the declared shelf life while still protecting the product sufficiently to avoid increasing food waste.
Chilled and frozen foods are particularly useful tests because packaging can be exposed to condensation, changing temperatures, fats, and mechanical handling for prolonged periods. Kelpi’s US clearance covers those use conditions, giving partners a broader range of products on which to test whether the coating’s regulatory status is matched by stable factory performance.
The commercial incentive is being strengthened by regulation. Europe’s Packaging and Packaging Waste Regulation is increasing pressure on manufacturers and packaging suppliers to design for recyclability, reduce unnecessary material, and reconsider structures that are difficult to recover. Brand owners are applying their own plastic-reduction targets at the same time.
None of those pressures removes the primary function of the pack. A lighter or more recyclable structure that shortens shelf life, fails on a packing line, or allows more product damage can simply move environmental and financial cost elsewhere in the system. Barrier alternatives therefore have to compete on process performance as well as material origin.
Fibre packaging also has to fit existing capital equipment if it is to scale quickly. Food factories are unlikely to replace serviceable packing lines merely to accommodate a new coating, so compatibility with established forming, filling, sealing, and inspection machinery becomes a commercial advantage for material developers.
The same is true for converters. A coating that can be applied using existing or modestly adapted equipment has a shorter route to volume than one requiring an entirely new manufacturing process. Consistency across rolls or sheets then becomes critical because downstream plants generally have little tolerance for packaging material that behaves differently from batch to batch.
Kelpi’s approval does not settle those production questions, but it removes a regulatory obstacle that would otherwise prevent commercial partners from progressing US applications. The company can now move development work towards launch programmes without the same uncertainty over whether the coating itself can be used for the intended food-contact conditions.
The next evidence will have to come from converting and packing operations rather than regulatory paperwork. If seaweed-derived coatings are to replace conventional fossil-based barriers at useful scale, they will have to survive the same unglamorous tests as any incumbent material: repeatable coating, fast machinery, stable seals, acceptable shelf life, and enough output to keep unit costs under control.
