"The paper component of most label backing sheets is called glassine, a highly processed, translucent paper whose fibers have been flattened and aligned to create a smooth surface. Glassine has uses in food wrappers, pastry bags, and envelopes, but its compressed fibers yield very little usable pulp in the recycling process."
"The second problem is the coating. Release liners are treated with a release agent - almost always silicone - that prevents labels from permanently bonding to the backing. This silicone layer is what allows you to peel cleanly. It's also what makes recycling nearly impossible at most facilities."
"A third issue is material variation. Some liners use plastic film made from PET (#1 plastic) or polypropylene (#5 plastic) instead of paper as their base, adding another layer of complexity. Without knowing what type of liner you have, there's no reliable way to route it into a specialized program."
Release liners, the backing on labels and stickers, generate over 400,000 tons of waste annually in the U.S., primarily ending in landfills. Their recycling is complicated by the glassine paper component, which yields little usable pulp, and a silicone coating that hinders processing. Additionally, variations in materials, such as plastic films, complicate recycling efforts. Historically, only 1-1.5% of liner waste has been recycled, highlighting the need for improved solutions in waste management.
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