中文Here is an uncomfortable truth the packaging industry would rather you did not think about: a lot of your recycling never actually gets recycled, and the ink on the package is part of the reason why.
This month Siegwerk, one of the world’s big ink players, secured a European patent (EP4107326) for a primer technology that does something deceptively simple — it lets printing inks that normally refuse to come off plastic be removed cleanly during recycling. If that sounds like a niche engineering detail, stick with me. It might be one of the more important sustainability stories of the year.
The hidden villain
We talk a lot about plastic itself — too much of it, wrong types, hard to sort. But ink is the silent troublemaker in the recycling stream. On a flexible pouch, ink can cover huge surface areas or sit buried inside laminated layers. When that material gets washed and reprocessed, leftover ink means discoloration, odour, and contamination. The recycled plastic comes out lower quality, and low-quality recyclate is exactly what brands do not want to put back on shelves.
Under the EU’s Packaging and Packaging Waste Regulation (PPWR), plastic packaging will need minimum shares of post-consumer recycled content from 2030. CEFLEX, a leading flexible-packaging recycling group, estimates around 2.5 million metric tons of flexible-packaging recyclate will be needed by 2030 just to hit the targets for flexibles. Miss that, and a lot of packaging simply will not be legal to sell.
So the race is on to make recycled plastic actually good enough to use. And Siegwerk is arguing that getting the ink off is a bigger lever than people realise.
How the patent works
At its core is a functional primer placed between the plastic substrate and the printing layer. When the material hits alkaline washing during recycling, that primer lets the entire print layer release and lift off before the polymer is reprocessed. The patent covers both solvent-based and water-based versions, and Siegwerk says the idea extends to UV printing and to complex constructions — laminates, labels, shrink sleeves — not just simple films.
The company has been quietly validating this across different substrates and packaging types in its own deinking lab and in joint research projects. One showcase was a deinkable mono-material pouch that kept its recyclable structure while still allowing effective print removal. That pouch won a Gold at the German Packaging Award. Patents and awards are nice, but the real proof is in the reprocessing line.
Why it matters to converters
If you are a label or flexible-packaging converter, this is the kind of development that moves from “interesting” to “contractual” very fast. The brands you supply are the ones who will be legally on the hook for recycled content in a few years. They will start asking pointed questions about whether your print decoration can survive a wash and come off cleanly.
That changes how you spec jobs. It means ink selection, primer choice, and substrate architecture become sustainability decisions, not just cosmetic ones. The converters who get ahead of this — who can tell a brand owner, “yes, our decoration is designed to deink” — will win the accounts that care about compliance and reputation.
The honest caveat
Siegwerk is clear-eyed that there will not be one magic answer for every structure and recycling stream. Flexibles are messy, multilayer, adhesive-laden things. But Lara Kleines, the company’s recycling and polymer expert, makes the strategic point well: as the value chain is forced to deliver far more recycled material at usable quality, ink removal becomes “an important lever for recyclate quality.”
That is the quiet takeaway. The future of flexible packaging will not be saved by a single hero material. It will be saved by a hundred unglamorous fixes like this one — primers, wash steps, and standards that make “recyclable” actually mean something when the truck pulls up at the reprocessor.
Siegwerk’s patent will not make headlines the way a splashy new press does. But three years from now, when brands are scrambling to hit their recycled-content numbers, this is exactly the kind of invisible plumbing they will be grateful exists. For converters, the time to understand it is now, not when the regulation lands.
The practical takeaway for converters is to start the conversation with brands now, not in 2029. Map which of your current jobs use inks that fight the wash. Ask your ink supplier what deinkable options already exist. The converters who can hand a brand owner a recyclability story — backed by a patent like this — will win the compliance-driven accounts before their rivals even understand the question. Waiting until the regulation lands is the expensive way to learn the same lesson.
In the end, this patent is a small, unglamorous brick in a very large wall. But walls are built from bricks, and the recyclability wall is the one the whole flexible-packaging industry is now obliged to build. Siegwerk just laid one more, and the converters paying attention today will be the ones still standing when the regulation finally arrives.
Source: Labels & Labeling (20 October 2026)
