Nylon 66(AKA PA66) is food grade Nowdays, most of tea bags in the market are made of nylon mesh

Tea Bag

Nylon tea bags are tea bags or sachets that are made out of a nylon mesh. Nylon tea bags are used primarily because they offer the potential for superior flavor, relative to traditional paper tea bags; however, there are environmental concerns associated with their use.

Nylon as a fabric generally has a high heat-resistance, far higher than the temperatures it is subjected to when steeped in hot water. However, there has been no published testing as to the safety of nylon tea bags, so it is impossible to say definitively that nylon tea bags are safe.

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