the flexible packaging composites include one or more mineral - containing layers with a bonding agent . the composite structure is used as a primary or secondary packaging container or insulating material . in addition to the mineral - containing layer , the composite can contain one or more non - mineral containing layers , including various combinations of extruded resins , cast or blown films , and fibers . the mineral - containing layer is substantially and continuously bonded to the other layers . the present invention is an unexpectedly unique and environmentally friendly composite structure containing mineral layers with bonding agents as a key component . the material is designed to form flexible and semi - rigid storage articles at equal or lower costs to prior art solutions while providing a mineral containing layer that is a very smooth , has comparatively high plasticity , and having a high quality printing surface not requiring corona treatment . the composite structure is used as a primary or secondary packaging container or insulating material . in addition to the mineral containing layer , the composite could contain various combinations of extruded resins , cast or blown films , and fibers . the mineral containing layer is substantially and continuously bonded to the other layers . the polymer , fiber , and mineral containing layers can be shaped , sized and manufactured such that the composite structure formed is subsequently machined to form a storage article . the composite structure has advantages including a high degree of pliability and flexibility , a minimum 37 dyne level on the surface of the mineral containing layer ; a mineral containing layer that is highly 86 opaque , and has a bright , white printing surface that readily accepts coating and inks , therefore , rendering it highly attractive to consumers . further , the composite structure has tensile strength , dead - fold , stiffness , and other characteristics that allow it to be readily machined into desired storage article forms and storage article closures , therefore , the material can be used for as a variety of food , consumer , industrial , anti - static , and commercial uses . other mineral containing layer advantages include environmentally attractive features such photo - degradability , recyclability , compostability , and bio - degradability .