Nylon or a special food-grade non-woven material is used to create such tea bags.
This type of packaging can be made at the “Inpac-Tetra” automated complex.
The material of these pyramid bags cannot be welded or soldered in the usual way, so the “Inpac-Tetra” machine uses ultrasound.
Thus, there is no need to use glue, metal clips, or the like for welding.
This helps the pyramid bag to preserve the purity and taste of the tea.