Myth-BustingAugust 19, 20261 min read

"If it is plastic, put it in the recycling bin"

Bags, wraps and mailers are plastic, carry resin codes, and look recyclable. They are also one of the most reliable ways to shut down a sorting line.

"If it is plastic, put it in the recycling bin"

This one is not a moral failing. It is a reasonable inference from bad labelling: the item is plastic, it has a chasing-arrows triangle on it, the bin is for plastic.

The U.S. EPA is unusually blunt about it. Bags, wraps and films are recyclable in some systems and cannot go in the household recycling bin.

Cling film. Plastic, thin, flexible — and the wrong shape for every machine downstream.
Cling film. Plastic, thin, flexible — and the wrong shape for every machine downstream.Photo: Ilmari Karonen, public domain

The myth

Claimed

A grocery bag, cling film, bread bag or shipping mailer is made of plastic, so it belongs with the bottles and tubs in the curbside cart.

Actually

Film is flexible. In a material-recovery facility it wraps around conveyor shafts, screens and disc rollers, and staff have to stop the line and cut it off by hand.

Why the shape matters more than the polymer

A MRF is a sequence of machines that sort by physical property: size on trommels, density on air classifiers, shape and rigidity on disc screens, polymer type on optical sorters. Every one of those assumes the object holds a shape.

The sorting line film gets caught in. Every wrapped shaft is unplanned downtime.
The sorting line film gets caught in. Every wrapped shaft is unplanned downtime.Photo: Wikimedia Commons, CC BY-SA

Film does not. It drapes, it flies, it tangles. Polyethylene bag material is perfectly recyclable as a polymer — it is the geometry that the collection system cannot handle, not the chemistry.

Baled film from a dedicated stream. The material has value once it is collected separately.
Baled film from a dedicated stream. The material has value once it is collected separately.Photo: Wikimedia Commons, CC BY-SA

The practical rule

Two questions, one of them physical: can you scrunch it?
Two questions, one of them physical: can you scrunch it?Diagram: The Waste Stack

Keep bags, wraps and films out of the curbside cart. If it scrunches into a ball and stays there, it is film. Clean and dry film can go to a verified retail or specialist drop-off where one exists; if there is no legitimate take-back route near you, follow local disposal guidance.

A supermarket film take-back point — a separate collection route, not the kerbside bin.
A supermarket film take-back point — a separate collection route, not the kerbside bin.Photo: Onthewings, CC0

The nuance worth keeping

"Not accepted in my curbside program" is not the same as "this material can never be recycled". The collection route and the sorting equipment are part of whether recycling works at all — which is why local rules genuinely differ and why checking yours is not a cop-out answer.

The failure mode at the other end. Light, mobile, and gone from the system entirely.
The failure mode at the other end. Light, mobile, and gone from the system entirely.Photo: Myotus, CC0

And the honest caveat about drop-offs: they are not universal, and "collection available" does not guarantee that every item is accepted or that it becomes a new product. Using fewer disposable bags and choosing durable alternatives avoids the collection problem rather than managing it.

References and image credits
  1. 01U.S. EPA — How do I recycle common recyclables?
  2. 02U.S. EPA — Frequent questions on recycling
  3. 03U.S. EPA — FAQs about plastic recycling and composting

Photo: Ilmari Karonen, public domain · Photo: Wikimedia Commons, CC BY-SA · Photo: Wikimedia Commons, CC BY-SA · Diagram: The Waste Stack · Photo: Onthewings, CC0 · Photo: Myotus, CC0