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Plastic lids are typically made through a process called injection molding. In this process, plastic pellets are heated until they melt and then injected into a mold that shapes the lid. Once cooled, the mold is opened, and the solidified lid is ejected. Other methods, like blow molding, can also be used for specific types of lids, especially those that need to be hollow or have unique shapes.

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1mo ago

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