Synthetic sponges were made possible to be manufactured only after the invention of polyester in the 1920s and the commercial production of polyurethane foam in 1952.

Material

Synthetic sponges can be made of polyester, polyurethane, or vegetable cellulose. Polyurethane is used in polyester sponges for their abrasive side. Polyester sponges are more common for dish washing and are usually soft and yellow. Microplastics

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