Filter bag for purifying water comprises the active ingredients in particulate form, as active ingredient-impregnated fibrous materials and/or as active ingredient-coated fibrous materials enclosed by a rigid or flexible filter bag

摘要

Filter bag comprises active ingredients in particulate form, active ingredient-impregnated fibrous materials and/or active ingredient-coated fibrous materials enclosed by a rigid or flexible filter bag. Water is able to flow through the bag but the active ingredients are not able to leave the bag. Preferred Features: The flexible bag is made from cellulose fibers, natural fibers, artificial fibers, cotton or a textile material. Holes are provided in the bag for the purposes of water exchange within and outside of the bag. The material of the bag is coated and/or impregnated with the active ingredients. The bag is made from plastic, metal, paper or fleece.