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  2. Low-density polyethylene - Wikipedia

    en.wikipedia.org/wiki/Low-density_polyethylene

    LDPE has SPI resin ID code 4 Schematic of LDPE branching structure. Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene.It was the first grade of polyethylene, produced in 1933 by Dr John C. Swallow and M.W Perrin who were working for Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization. [1]

  3. Retort pouch - Wikipedia

    en.wikipedia.org/wiki/Retort_pouch

    A Meal, Ready-to-Eat (MRE), a field ration that uses a retort pouch as packaging. A retort pouch or retortable pouch is a type of food packaging made from a laminate of flexible plastic and metal foils. It allows the sterile packaging of a wide variety of food and drink handled by aseptic processing and is used as an alternative to traditional ...

  4. Polyethylene - Wikipedia

    en.wikipedia.org/wiki/Polyethylene

    Polyethylene or polythene (abbreviated PE; IUPAC name polyethene or poly (methylene)) is the most commonly produced plastic. [7] It is a polymer, primarily used for packaging (plastic bags, plastic films, geomembranes and containers including bottles, etc.).

  5. Recycling codes - Wikipedia

    en.wikipedia.org/wiki/Recycling_codes

    Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.

  6. Biodegradable additives - Wikipedia

    en.wikipedia.org/wiki/Biodegradable_additives

    Starch is most commonly used as a biodegradable additive for both low-density polyethylene (LDPE) and high-density polyethylene (HDPE). [8] Since polyethylene is used for a wide range of uses, from plastic bags to plastic water bottles to outdoor furniture, large amounts of PE plastic is thrown away each year, and determining ways to increase ...

  7. Plastic shopping bag - Wikipedia

    en.wikipedia.org/wiki/Plastic_shopping_bag

    Traditional plastic bags are usually made from polyethylene, which consists of long chains of ethylene monomers. Ethylene is derived from natural gas and petroleum. The polyethylene used in most plastic shopping bags is either low-density (resin identification code 4) or, more often, high-density (resin identification code 2). [19]

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