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2. Resin identification code - Wikipedia

   en.wikipedia.org/wiki/Resin_identification_code

   The Resin Identification Code (RIC) is a technical standard with a set of symbols appearing on plastic products that identify the plastic resin out of which the product is made. [1] It was developed in 1988 by the Society of the Plastics Industry (now the Plastics Industry Association ) in the United States, but since 2008 it has been ...

3. Polystyrene - Wikipedia

   en.wikipedia.org/wiki/Polystyrene

   Styrene is "generally found in such low levels in consumer products that risks aren't substantial". [110] Polystyrene which is used for food contact may not contain more than 1% (0.5% for fatty foods) of styrene by weight. [111] Styrene oligomers in polystyrene containers used for food packaging have been found to migrate into the food. [112]

4. Styrene - Wikipedia

   en.wikipedia.org/wiki/Styrene

   Styrene is an organic compound with the chemical formula C 6 H 5 CH=CH 2. Its structure consists of a vinyl group as substituent on benzene. Styrene is a colorless, oily liquid, although aged samples can appear yellowish. The compound evaporates easily and has a sweet smell, although high concentrations have a less pleasant odor.

5. Styrene-acrylonitrile resin - Wikipedia

   en.wikipedia.org/wiki/Styrene-acrylonitrile_resin

   Styrene acrylonitrile resin (SAN) is a copolymer plastic consisting of styrene and acrylonitrile. It is widely used in place of polystyrene owing to its greater thermal resistance. The chains of between 70 and 80% by weight styrene and 20 to 30% acrylonitrile. [ 1 ]

6. Acrylonitrile styrene acrylate - Wikipedia

   en.wikipedia.org/wiki/Acrylonitrile_styrene_acrylate

   ASA can be made by either a reaction process of all three monomers (styrene, acrylonitrile, acrylic ester) or a graft process, although the graft process is the typical method. A grafted acrylic ester elastomer is introduced during the copolymerization of styrene and acrylonitrile. The elastomer is introduced as a powder. [11]

7. Plastic container - Wikipedia

   en.wikipedia.org/wiki/Plastic_container

   It is estimated that 3.4 billion tonnes of plastic packaging were created between 1950 and 2017. [1] Most plastic packaging is disposed of within a relatively short time. Discarded packaging accounts for 46% (158 million tonnes) of total annual plastic waste generation. Most plastic packaging waste is estimated to come from household waste.