Short answer: Acrylic (PMMA) is recyclable, but not in your curbside bin: it falls under resin code 7 (Other), and city programs such as San Jose's tell residents to put acrylic sheet in the garbage. Specialist plants recycle it by depolymerization, heating it back into methyl methacrylate (MMA) monomer that the EU's MMAtwo project purified to above 99.8% and that Trinseo now uses in its R-Life recycled sheet and resins. For household scrap, reuse, donating offcuts, or a plastics recycler that accepts clean PMMA are the realistic options.

Key facts

  • Resin code: 7, "Other". Acrylic has no number of its own in the resin identification code system.
  • Curbside: almost never accepted. San Jose, for example, lists acrylic plastic ("acrylic glass") as garbage even though it takes some #7 containers.
  • Best recycling route: depolymerization (chemical recycling) back to MMA monomer, then new acrylic.
  • Recycled monomer purity: above 99.8% in the EU-funded MMAtwo project (2018 to 2022), with up to about 70% lower CO2 than virgin MMA.
  • How much gets recycled: only about 10% of the 300,000+ tons of PMMA made in Europe each year, per MMAtwo.
  • Commercial plants: Trinseo opened a continuous PMMA depolymerization plant in Rho, Italy, in June 2024; Mitsubishi Chemical is developing microwave depolymerization in Japan.
  • Recycled-content products: Altuglas R-Life cast sheet and Plexiglas R-Life resins (Trinseo).

Why doesn't acrylic go in the curbside bin?

Curbside recycling is built around a few high-volume packaging plastics: mostly PET bottles (code 1), HDPE jugs (code 2), and sometimes polypropylene tubs (code 5). Acrylic falls under code 7, "Other", a catch-all that also covers polycarbonate, nylon, ABS, and PLA. The code only identifies the plastic; it doesn't mean anyone near you collects it.

Sorting facilities have no buyer for small amounts of acrylic sheet, so it ends up as trash or as contamination in a bale of something else. Some cities say this outright: San Jose's recycling guide accepts #7 bottles, tubs, and jars but sends acrylic plastic to the garbage. Rules vary, so check your local program, but expect a no. Sheet scraps are also the wrong shape for sorting lines, and broken pieces are sharp.

How does acrylic actually get recycled?

Depolymerization (chemical recycling)

Acrylic has a property most plastics don't. Heat it under controlled conditions without air and the polymer chains "unzip" back into their building block, methyl methacrylate (MMA) monomer. The crude MMA is distilled and purified, then polymerized into new acrylic. Because it goes all the way back to monomer, colorants, additives, and contaminants can be removed, and the new sheet can match virgin quality.

  • MMAtwo (EU Horizon 2020, 2018 to 2022): a 16-partner consortium that developed the process for post-industrial and end-of-life PMMA, including lower-grade scrap. It reported regenerated monomer above 99.8% purity and CO2 savings of up to 70%, and identified more than 30,000 tonnes a year of new European scrap suitable for the process.
  • Trinseo (Altuglas and Plexiglas brands): in June 2024 it opened a continuous depolymerization plant in Rho, Italy, based on the MMAtwo work. It takes pre- and post-consumer acrylic, including sheet that couldn't be mechanically recycled, and the recycled MMA goes into Altuglas R-Life cast sheet and Plexiglas R-Life resins, used even for optical parts like taillights.
  • Mitsubishi Chemical: the world's largest MMA maker, working since 2021 with Microwave Chemical Co. on microwave-heated depolymerization. It says the process accepts PMMA regardless of maker, color, or grade, and it has run take-back demonstrations including tail lamps with Honda and acrylic keychains and stands.

Mechanical recycling

Clean, sorted extruded and molded acrylic can be ground and re-melted into new extruded or molded products. That works best for single-color, single-type scrap, and colored scrap tends to end up in dark products. Cast sheet is the problem child: its molecular weight is so high that it doesn't melt and flow like extrusion resin, which is why depolymerization matters for it. More on the two kinds in cast vs extruded acrylic.

Both routes mainly take large, clean loads from fabricators and industry. Capacity is growing, but most households can't get to it directly yet.

What can you do with acrylic scrap at home?

Find a recycler that takes PMMA

  • Search for plastics recyclers or scrap buyers near you that list "PMMA" or "acrylic". Some take small loads by appointment.
  • Keep it clean and sorted: protective film off, no paint, vinyl, glue, or metal hardware, and kept apart from polycarbonate and PETG, which look similar.
  • Ask local plastics distributors and sign shops whether they collect scrap for a recycler.

Reuse it

Acrylic doesn't break down on a shelf, so offcuts stay useful for years.

  • Small parts and tests: coasters, keychains, earrings, ornaments, tags, and test pieces.
  • Shop aids: spacers, shims, router and saw templates, jigs, and guards.
  • Home and garden: plant labels, drawer dividers, seed-starting covers, small cold frame windows.
  • Give it away: schools, makerspaces, robotics teams, art programs, and model builders often want clean offcuts.

Ideas to start with: acrylic keychains, drawer dividers, and router and saw templates.

How we keep scrap down

The greenest offcut is the one that never gets made. We nest parts tightly on each sheet, fitting small parts into the gaps around big ones. You can help by sizing parts to use the sheet well: our sheet yield calculator shows how many parts fit on a 48 × 96 in. sheet, and a small size change can fit another row. When you're ready, the instant quote prices your parts.

Is acrylic better for the environment than other plastics?

It depends on what you compare. Acrylic is made from fossil feedstocks, like most plastics, and it doesn't biodegrade. In its favor, it lasts a long time: Acrylite warrants its clear cell cast sheet not to lose more than 3% of its light transmission over 30 years. Scratches polish out, and it's one of the few plastics that can be chemically recycled to like-new material. A part that lasts decades and gets reused is usually a better outcome than a cheaper plastic that yellows and gets thrown out sooner. Compare in acrylic vs PETG and acrylic vs HDPE and other plastics.

Questions

Is plexiglass recyclable?

Yes, in the same way: Plexiglas is a brand of acrylic (PMMA), so it can be depolymerized or mechanically recycled by specialists but is almost never accepted curbside. Treat Plexiglas, Lucite, Perspex, Acrylite, and Optix sheet the same.

Is acrylic yarn, paint, or nail acrylic the same plastic?

No. Acrylic yarn and fabric are polyacrylonitrile, acrylic paint is an acrylic polymer emulsion, and nail acrylic is a different methacrylate system. None of them go through PMMA sheet recycling, so check your local rules for each separately.

Can I burn acrylic scrap?

No. Acrylic is combustible and burns hot, and with limited air it gives off carbon monoxide and other fumes you shouldn't breathe. Open burning of plastic is also banned in many places.

How do I know if my plastic is acrylic?

Acrylic is stiff, cracks rather than bends when overstressed, and its clear edge looks slightly green-blue. Polycarbonate flexes more and is very hard to break. If a piece is unmarked and you're unsure, keep it out of loads labeled acrylic.

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