What component found in many traditional paper tea bags raises concerns about microplastic shedding when steeped in hot water?
Answer
Heat-seal strip made of polypropylene plastic
Although paper bags seem entirely organic, a significant material concern exists regarding their construction. To ensure the bag does not tear or burst open during the steeping process or handling, paper bags often incorporate a heat-seal strip necessary for closure. This strip is frequently made from polypropylene, which is a type of plastic. Because this plastic component is present, a notable portion of the bag may not biodegrade, and more critically, the heat of the water used for brewing raises concerns regarding the potential shedding of microplastics into the final tea infusion.
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