At a Glance
- Chemical vs. mechanical recycling is a growing point of confusion in food packaging, with major differences in cost, performance, and how materials are processed back into usable forms.
- Mechanical recycling is established and more affordable, but material quality degrades with each cycle, often requiring design or material adjustments.
- Chemical recycling can return plastics to near-virgin quality and support circularity goals, but demands significantly higher energy and cost.
- Food businesses must understand these trade-offs to make honest sustainability claims and navigate EPR compliance without compromising food safety, shelf life and budgets.
As we look at the U.S. Plastics Pact’s Roadmap to 2025, we need to take a deeper look at one of its topics of great interest. Let’s say that you’re standing in front of your product line, looking at the packaging that keeps your food fresh and your customers happy. Then comes the question that’s been keeping you up at night: “Is this actually recyclable?”
Welcome to the club. Every food business professional is wrestling with the same puzzle right now. Your packaging choices affect your bottom line, your brand reputation, and whether you’ll face hefty fines under new Extended Producer Responsibility (EPR) laws (more content on this to come!). But here’s what makes it trickier: Not all recycling is created equal.
The recycling industry has two main approaches — mechanical and chemical — and understanding the difference isn’t just good for the planet. It’s essential for your sustainability claims.
To help us navigate this maze of recycling nuance, we spoke with Conor Carlin, Founder and President of Clefs Advisory, LLC. Carlin served as the 2024 President of the Society of Plastics Engineers. Having also worked as the former North American GM of ILLIG, Carlin brings a wealth of expertise to the table, including (but not limited to) materials, advanced recycling technologies, environmental policy, and commercial strategy shaped by years at the nexus of packaging innovation and sustainability.
This article explains the two recycling methods and why understanding them matters for your packaging and sustainability decisions. It also explores their impact on your budget and your business.
What’s the Actual Difference Between Mechanical and Chemical Recycling?
Chemical recycling is like taking apart a sweater thread by thread. Instead of cutting the sweater into smaller pieces, you’re unraveling it all the way back to the yarn. Those threads can then be used to make something new — sometimes another sweater, sometimes something completely different, like fuel or industrial waxes.
Here’s where it gets interesting: a rigid PET clamshell could, in theory, become jet fuel through chemical recycling (a huge oversimplification, but still technically possible). Circular-economy purists aren’t fans of that outcome — they want your package to become another package, not airplane fuel.
On the other hand, think of mechanical recycling like making a smoothie. You’re chopping up the plastic (but not eating it…maybe “smoothie” was the wrong analogy), washing it, and processing it back into something usable. The important part? You’re not changing what the plastic actually is. The polymer chains stay intact — you’re just breaking the physical package into smaller pieces.
Does Mechanical Recycling Actually Work Long-Term?
It’s time to get to the nitty-gritty. Mechanical recycling has a dirty little secret: It degrades every time you do it. Each heat cycle weakens the material slightly. It’s like recycling paper — the fibers get shorter each time until eventually, you can’t make quality paper anymore.
Add recycled content to your packaging, and suddenly you might need to redesign the whole thing because the hinge that worked with virgin plastic now snaps. Polymer chemists are pretty clever, though. They’ve developed special additives, like polymer extenders, to make recycled plastic work better. These additives help fix broken plastic chains by making them longer again.
This matters because 100% recycled PET typically costs significantly more than lower recycled-content blends, such as 25% PCR. But material cost is only part of the equation.
If recycled resin performs differently than virgin plastic, existing packaging features — like hinges, snaps, or seals — may no longer behave as intended. In some cases, seals can weaken, closures can fail, or package integrity can be compromised, forcing redesigns, line adjustments, or retooling that weren’t part of the original budget.
Despite these challenges, mechanical recycling remains the industry workhorse. It’s established, relatively affordable, and it works — just not infinitely. Kind of like how a dependable “grocery-getter” car works: Totally fine, but not forever.
Why Isn’t Chemical Recycling More Common?
Because it’s expensive. Really expensive, especially when compared to mechanical recycling.
Chemical recycling requires massive amounts of energy. You’re breaking molecular bonds that nature would only break given extremely low pressure, low temperature, and millions of years. We typically compensate with high heat and high pressure — meaning serious energy costs and potential safety considerations which add to the cost structure.
The companies that have done this successfully, such as Exxon, Cyclyx, and Alpek, have spent a century mastering these complex industrial processes. They know what they’re doing, but it doesn’t come cheap.
For food businesses, this translates to higher costs for chemically recycled materials. The technology works and scales, but your CFO might need convincing when they see the price tag.
Which Type of Recycling Matters for EPR Compliance?
Here’s the uncomfortable truth: EPR programs (Extended Producer Responsibility initiatives, in which the “producer” of a suitable material must pay for collection/sorting/recycling) care most about said recyclability and collection, not greenhouse gas emissions.
Under EPR’s eco-modulation fee structure, you could have a lightweight, flexible package that’s 95% recyclable and has a minimal carbon footprint. But because it’s harder to recycle than rigid containers, you’ll pay higher fees than someone using a heavier, more recyclable material with a larger carbon footprint.
The system is designed to fund better collection and recycling infrastructure. That’s good for Material Recovery Facilities (or MRFs, where materials are sorted). But for food businesses trying to balance sustainability with costs? It creates head-scratching trade-offs.
Both mechanical and chemical recycling “count” under EPR programs — but only if the process results in new packaging material that can re-enter the market.
In other words, EPR frameworks reward outcomes, not methods. Whether material is mechanically reprocessed or chemically broken down and rebuilt matters less than whether it can be collected, sorted, recycled at scale, and turned back into usable packaging.
How Should Food Businesses Choose Between the Two?
Start with an honest audit of your packaging before EPR laws force your hand.
Look at your product line and ask: What material is this made of? Is it mono-material or multi-layer? Can it be collected and recycled in most markets? What would the eco-modulation fees look like under EPR?
Don’t wait for perfect information. Whether we end up with federal EPR or a patchwork of state laws, you’ll need this audit either way. Doing it now, before deadlines and fines potentially kick in, gives you time to redesign if needed.
But don’t sacrifice food safety or product performance chasing lower fees. Your first responsibility is getting safe, fresh food to consumers.
The Cycle That Works for Your Business
For your business, set realistic goals. If you’re using mechanical recycling with 25% recycled content today, that’s worth celebrating. You don’t need to claim you’re saving the planet (though high-fives are in order), just be honest about the trade-offs you’re making.
Both mechanical and chemical recycling can play a role in your packaging strategy. Neither is a silver bullet. Mechanical is proven and affordable, but degrades the material over time. Chemical restores virgin-quality material, but it costs more.
Your job isn’t to solve the entire recycling conundrum, but to make smart packaging decisions that keep your food safe, your customers happy, your brand honest, and your business compliant with evolving regulations.
Start by auditing your packaging as if EPR already applies to you. Understand your materials, your fees, and your options. Work with suppliers who can explain the trade-offs honestly. And remember: The goal isn’t perfection. It’s progress.
Because the food businesses that thrive won’t be the ones with perfect packaging, they’ll be the ones who made informed decisions, stayed compliant, and were honest with their customers about the journey — and that’s a cycle we can all get behind.
Do you want to find out more about packaging and sustainability? Visit the Inline Plastics’ Learning Center today and explore a wide range of topics.
Would you like to know more about Conor Carlin and his work at Clefs Advisory LLC? Connect with him on LinkedIn today.
