SHEETLIKE COMPOSITE, ESPECIALLY FOR PRODUCTION OF DIMENSIONALLY STABLE FOOD OR DRINK PRODUCT CONTAINERS, COMPRISING A POLYMER LAYER HAVING AN L VALUE

The invention relates to a sheetlike composite comprising, as mutually superposed layers in a direction from an outer face of the sheetlike composite to an inner face of the sheetlike composite, a) a carrier layer, and b) a barrier layer; wherein the sheetlike composite additionally includes a polymer layer P comprising a first polymer; wherein the polymer layer P has an L value in the L*a*b* colour space within a range from 30 to 56. The invention further relates to methods of producing a sheetlike composite, a container precursor and a closed container and to the aforementioned method products; to a container precursor and a closed container each including at least one sheetlike region of the sheetlike composite; to uses of the sheetlike composite for production of a food or drink product container and in a microwave oven; and to uses of compositions for production of a sheetlike composite for a food or drink product container.