by Cassandra Balentine
Thermal lamination uses heat to fuse a layer of protective film onto a paper or plastic substrate. It is commonly used to protect printed surfaces from damage in storage and transit, or to give product packaging moisture-resistant qualities. This finishing technique plays an evolving role in digitally printed flexible packaging.
According to Ryan Chai, category lead, Label and Packaging, Nobelus, the primary benefit of thermal lamination for digitally printed packaging is that it has no wet adhesive cure time. “You laminate, you finish, and you’re done.”
“Thermal lamination requires zero curing time, allowing for immediate converting, cutting, and finishing and future inline solutions,” agrees Joan Marc Taboas, CEO Enprom Solutions – ABG Girona (ABG International Group).
For a converter running short-run digital jobs with fast turnarounds, that can be the difference between making a deal or not. “This is compared to solvent- or water-based adhesive lamination where you’re waiting for cure windows before you can cut, slit, and deliver,” adds Chai.
Additionally, thermal lamination uses heat and pressure, so there is no solvent chemistry involved in the bond itself. “That removes a whole category of compliance risk, especially as regulators and brand owners get more aggressive about what they’ll accept in food-contact packaging,” comments Chai.
“Because the process is entirely dry, it eliminates the risk of chemical migration and residual odors, making it the safest and most compliant choice for food and pharmaceutical packaging,” adds Taboas.
Addressing Challenges
Whether it is toner-based, HP Indigo, or a high-speed inkjet press, digital printing produces a surface that behaves differently than flexography or offset. For instance, ink laydown is thinner, the surface energy varies by substrate, and sensitivity to the heat and pressure involved in lamination is possible, explains Chai.
A laminate engineered for digital with appropriate adhesion chemistries and processing temperatures is going to perform more consistently than a general-purpose film pulled from a commodity catalog and put on a digital press.
Adhesion in digital printing is often more complex than conventional printing, and Chai suggests that the topic doesn’t get enough attention in conversation.
“The challenge is that digital toners and inks—particularly electrophotographic toners like HP Indigo ElectroInk—create a surface that conventional laminate adhesion wasn’t designed for. The toner layer sits on top of the substrate and can act as a release layer if the laminate chemistry isn’t right. You can pass a basic adhesion test and still see delamination in the field when exposed to cold temperature, moisture, or stress,” explains Chai.
To address this issue, Nobelus starts with film selection and adhesive chemistry matched to the print process. “For converters running HP Indigo equipment, that means a thermal laminate with an EVA or co-polymer adhesive formulated to bond effectively through the toner layer, not just to the substrate beneath it. For inkjet, you’re dealing with different ink chemistries and sometimes primer coatings that change the surface profile entirely,” he adds.
Beyond that, process parameters matter—nip pressure, temperature, and line speed all interact with the printed surface in ways that are different from an unprinted substrate.
Chai explains that part of what Nobelus does is “work with converters to dial those parameters in for their specific press and substrate combination rather than handing them a spec sheet and walking away.”
Nobelus has built its flexible packaging portfolio around the needs of converters who want to move faster and do more in house, and thermal lamination is central to that. The Nobelus StrataFlex Thermal Pre-Lams are METPET structures with two functional layers built in—an EVA thermal adhesive layer on one side for lamination and a PE sealant layer on the other for sealing. “When you pair these pre-lams with a reverse-printed film, you significantly cut down on material changeovers on your printing press, which is typically your most expensive asset. That’s a real operational win, especially for converters who focus on shorter digital runs,” says Chai.
Another vendor, ABG International, provides high-performance thermal laminates specifically engineered for the digital printing sector and as part of its strategic ABG FlexPack roadmap, is set to expand its portfolio with a specialized range of pouch-dedicated solutions.
Karville is one more example of digital ready lamination, the company is an HP Indigo Pack Ready Lamination Provider. This technology is a set of post-print converting solutions for HP Indigo digital presses that provides zero-cure-time lamination, enabling digital converters to print, laminate, and pack on demand for immediate time to market.
Market Adaption
Thermal lamination is adapting to manage heat-sensitive substrates.
“This is one of the more active areas of development right now,” admits Chai.
Digital printing has expanded the range of substrates people want to laminate to, including thinner films, sustainable mono-material polyethylene (PE) films, and shrink materials.
Traditional thermal lamination runs at temperatures that can cause dimensional instability or surface distortion in heat-sensitive materials. Adaptations to handle these issues can occur at a couple of levels.
First is adhesive chemistry. “Adhesives with a lower activation temperature can achieve a good bond at temperatures that don’t stress the substrate. However, this comes with tradeoffs, and you need to be precise about your processing window,” explains Chai.
Second is equipment design. “Modern thermal laminating systems with precise nip temperature control and variable-speed capability, alongside a variety of wrap angles, give converters much more flexibility than older equipment where you were essentially locked into a narrow operating range,” adds Chai.
Additionally there is a move towards mono-material packaging.
Mono-material is one of the most significant structural shifts Chai has seen since being in this industry.
“Brand owners and retailers are under real pressure—both regulatory and consumer driven—to move packaging toward structures that can be recycled through existing infrastructure. Multi-layer laminates that combine PET, BOPP, PE, and aluminum in the same structure are effective as packaging, but they are essentially unrecyclable at scale. That’s not a sustainable position.”
Thermal lamination plays a meaningful role in enabling mono-material structures. For example, Nobelus’ EcoElement PE Thermal Sealants are a direct response to this as they’re designed to function as both the thermal adhesive layer and sealant layer in an all-PE structure. “When you pair them with a PE print web, you get a fully flexible, heat-sealable package that’s compatible with PE film recycling streams,” exclaims Chai.
As always, there are tradeoffs with new technology. Chai admits that PE-based structures don’t always match the barrier performance or the print clarity of traditional BOPP/PET constructions or the barrier performance of foil. “The work right now is on closing that gap—better barrier PE films, improved ink adhesion on PE surfaces for digital printing, and structures that can run on existing equipment without requiring a full retooling of the converter’s production line,” he adds.
Thermal lamination offers a way to add functionality with barrier, sealability, and protection to a mono-material print web while supporting the digital value proposition. According to Chai, this is the key connection between thermal lamination and where the industry is going regarding sustainability.
Adapting to the Times
Thermal lamination is ideal for converters running short-run digital jobs with fast turnarounds as it eliminates the need for dry time. The technology also uses heat and pressure as opposed to solvent chemistry, which can complicate compliance and regulations, especially around food and beverage packaging. Current providers adapt to new demands for digitally printed flexible packaging.
May2026, DPS Magazine
