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What is the non-woven fabric material of milk tea bag?

According to the query encyclopedia.

1, milk tea bag nonwoven fabric is also called nonwoven fabric, needle-punched cotton, needle-punched nonwoven fabric, etc. , is made of polyester fiber and polyester fiber (abbreviated as PET).

2. It is made by needling process, and can be made into different thicknesses, handfeel, hardness, etc.