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Plastic bags are made out of "film", or thin flexible
sheets of plastic. Plastic film is typically defined as
any plastic less than 10 mm thick. The majority of
plastic films are made from polyethylene resin and are
readily recyclable if the material is clean, dry, and not
pigmented black.

The resin coding system was originally intended for
rigid plastic containers only. However, many
manufacturers are now putting the code on plastic films
too. Check out www.plasticsresource.com
for more information about plastics recycling, resin
codes, and other types of plastic. If no resin code is
printed on the plastic film or bag, the film's
application may indicate the resin type since different
resins are chosen for their unique performance or observe
the film's characteristics and appearance and compare to
the descriptions below.

| RESIN CODE |
CHARACTERISTICS AND EXAMPLES |
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LDPE - Low Density Polyethylene
(unpigmented films have high clarity, moderate stretch & strength characteristics)
- Bags (e.g., thicker newspaper bags, bread bags)
- Bubble wrap (may also contain nylon)
Note: Bubble wrap recycling can be difficult without local markets due to shipping constraints.
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LLDPE - Linear Low Density Polyethylene
(unpigmented films have moderate clarity, slightly tacky feel to the touch)
- Bags (e.g. clear, thin newspaper bags)
- Dry cleaning film
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MDPE - Medium Density Polyethylene
(unpigmented films have moderate clarity, poor stretch and strength
characteristics)
- Consumer paper packaging (i.e. toilet paper, paper towel)
Note: MDPE is a variation on the production of LDPE and is often labeled #4. It’s generally used as an alternative
to other resins in film applications where strength is not required.
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HDPE - High Density Polyethylene
(unpigmented films have some opacity, crinkle to the touch, low stretch, can
tear easily, high strength)
- Most grocery bags
- T-shirt bags
- Bags with sealed air for packaging (e.g., air cushion)
Note: Release air from air cushions before including with bags.
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Check out www.plasticsresource.com
for more information about plastics recycling, resin
codes, and other types of plastic.
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