The bag needs to be sealed to keep the coffee powder fresh, coffee is very sensitive to the influence of the external environment. Therefore, first of all, you need to set up a barrier on the packaging, which will help avoid interference from oxygen, ultraviolet rays, and other factors.
Today, many stand-up coffee bags have three-layer metal plates or pure aluminum plates, Alternatively, you can choose a double layer high barrier polyester laminate, which is made of 100% plastic, which can keep coffee powder fresh, including sealing strips. These bags can be recycled in most Nordic countries.
To prevent as much ultraviolet light from entering the bag as possible, please consider using black or white polyester fiber or printing dense patterns.