Compostable top lid structure for a beverage preparation capsule

Abstract

The invention relates to a capsule (100) for preparing a beverage in a beverage production machine, the capsule (100) comprising a capsule body (200) delimiting a chamber (250) for containing a beverage substance (500), an injection wall (220) closing the chamber at a first end and a delivery wall (300) closing the chamber (250) at a second end of the capsule body (200). The delivery wall (300) comprises in a layered manner a carrier layer (320) for carrying the subsequent layers, an optional filter layer (310) and a barrier layer (340) applied on the carrier layer (320), the barrier layer (310) providing a preferably bidirectional barrier against moisture and / or gas, the barrier layer (340). As proposed the barrier layer (340) is applied in one or more layers in a total quantity of 0,5 to 10 gsm (g / m2), preferably of 1,5 to 4 gsm (g / m2) and is applied on least one of the carrier layer's surfaces, said surface having a surface roughness lower than 1;3 microns when measured according to ISO 3274. The invention also relates to a system comprising the proposed capsule and to a use of the proposed capsule for preparing a beverage in a beverage production machine

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