For temperature-sensitive foods like chocolate, ice cream and confectionary, even a short exposure to heat during the packaging process can make the difference between premium quality and product loss. That’s where innovation in paper-based packaging comes in. At delfort, we’ve engineered cold-sealable barrier papers that protect sensitive products with cold sealant - combining advanced barrier performance, process efficiency, and recyclability in one solution. Discover how you can protect product integrity and move toward more recyclable materials.
why cold-sealable paper matters for sensitive foods
Developing paper that can also be cold-sealed is particularly important for food items that can melt or be damaged by heat-sealing processes. Paired with compatible cold seal coatings and varnishes, such as those developed by Henkel, our paper provides robust protection and forms the material basis of a compact package. This ensures that the taste, appearance and texture of foods are consistently maintained at their highest quality.
Despite its lightweight design, our paper is incredibly strong, with excellent flex-crack resistance that withstands the demands of handling and transportation. It is recyclable according to the CEPI method, combining both high functionality and sustainability.
Cold-sealable barrier paper is a must-have for heat-sensitive products. With our thinbarrier range, we combine excellent protection with process efficiency and recyclability - helping brands transition to paper without compromising performance.
no freezer burn: advanced moisture barrier (low MVTR)
Our paper delivers an excellent moisture vapor barrier (MVTR), effectively limiting moisture ingress and stabilizing product conditions inside the package. Our thinbarrier papers deliver MVTR barriers down to only 10 g/m2.day at 23°C and 85% relative humidity, improving significantly to around 1 g/m²·day at –18°C, making it particularly effective for frozen food applications. This is critical, as uncontrolled moisture migration can lead to freezer burn, surface ice formation, and texture degradation. By maintaining a controlled moisture barrier, the paper helps preserve appearance, flavor, and structural integrity throughout shelf life.
Beyond frozen applications, a good MVTR barrier is equally important for humidity-sensitive foods like powders, dry snacks, and baked goods, where even minor moisture fluctuations can impact crispness, flowability, and overall product quality.
preserving aroma and freshness (low OTR barrier)
A stable oxygen barrier is essential to protect sensitive food formulations from oxidative degradation during storage. delfort’s thinbarrier paper range is engineered with a low oxygen transmission rate (OTR), with specific values down to below 10 cm³/m²·day (measured at 23°C and 50% relative humidity), limiting the interaction between oxygen and product components such as fats and aromas. This helps minimize rancidity and flavor degradation, which are key quality risks in chocolate and confectionary.
“Controlling oxygen permeation is fundamental when packaging high-quality snack products. Our barrier paper is designed to maintain the original taste, aroma, and product integrity throughout the entire shelf life.”, says Roman.
By maintaining a consistent internal atmosphere, the paper supports the preservation of sensory attributes, ensuring that premium products deliver the intended taste experience and quality perception in ambient and temperature-sensitive applications.
lightweight yet exceptionally strong
One of the standout benefits of our heat and cold-sealed barrier paper is its exceptional strength and non-blocking properties. The paper withstands the rigors of packaging and handling, ensuring it doesn’t tear or open unintentionally, keeping your products secure from production to delivery. Additionally, release varnishes on top of the cold seal of the paper prevent the paper from sticking to itself during storage or processing, making it easy to work with and ensuring smooth operations on high-speed packaging lines. This combination of strength and non-blocking performance provides both reliability and convenience, so your products stay perfectly protected every step of the way.
high-performing barrier paper meets advanced cold-seal coatings
To maximize cold-seal compatibility and efficiency, we also collaborated with Henkel:
delfort’s barrier paper was optimally designed with a paper surface that makes it compatible with a range of cold seals from Henkel, each tailored for specific requirements of relevant flow pack structures. These cold seals promote circularity by being certified as recycling-compatible and enable sustainable packaging solutions that align with the industry's shift towards a closed-loop economy.”
This collaboration ensures consistent seal integrity, process efficiency, and recyclability, supporting brands in transitioning to high-performance, paper-based packaging solutions.
seal your success with delfort
Our heat and cold-sealable thinbarrier papers set a new standard in lightweight, functional packaging solutions:
- Superior barrier performance (MVTR, OTR, aroma, grease)
- Designed for heat-sensitive products
- Recyclable paper-based solution
- Proven processability and durability
We support brands and converters worldwide in delivering safe, fresh, and high-quality packaged goods – so your temperature-sensitive products stay cool, even under demanding conditions.
FAQS
What is MVTR (moisture vapor transmission rate)?
MVTR describes how much water vapor passes through a packaging material over time. It is used to evaluate how well a material protects products from humidity and moisture exposure.
What is OTR (oxygen transmission rate)?
OTR measures how much oxygen can permeate through a packaging material. It indicates how effectively the material limits exposure to oxygen, which can affect product stability and shelf life.
What is the CEPI method and why is it relevant?
The CEPI method (Confederation of European Paper Industries) is a standardized test used to evaluate the recyclability of paper-based packaging. It assesses key factors such as fiber yield, visual impurities, sheet adhesion, and dissolved substances (DCS). Materials that meet CEPI criteria are compatible with existing paper recycling streams, supporting a circular economy.
Roman König
With over 40 years of experience in international product management and flexible packaging, Roman König brings exceptional expertise and a holistic perspective to the industry. As Head of Product Management in Packaging at delfort, he specializes in developing sustainable solutions, advancing packaging technologies, and optimizing organizational structures to build scalable, future-ready capabilities.
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With our specialized expertise and deep knowledge in designing lightweight paper packaging, we're not just your partners we're your catalysts for change, your collaborators in innovation.
Contact us and join the paper revolution today!
