Cartridge for the preparation of liquid products

Abstract

A cartridge ( 10 ) containing a dose ( 12 ) of at least one substance That can be used for preparing a liquid product, such as for example coffee, comprises a side wall ( 140 ), a bottom wall ( 142 ), through which the aforesaid liquid can flow from the cartridge ( 10 ), and a wall ( 16 ) for closing the cartridge ( 10 ) at the end opposite to said bottom wall ( 142 ). the bottom wall ( 142 ) comprises a cellulose compostable material having aN air permeance not higher than 20 μm/(pa·s) (according to ISO 5636) and has a thickness of between 20 μm and 2.5 mm.

1 . A cartridge containing a dose of at least one substance for use in the preparation of a liquid product, said cartridge including a side wall, a bottom wall, through which said liquid product is able to flow from the cartridge, and a wall for closing the cartridge at the end opposite to said bottom wall, wherein said bottom wall:
 includes a cellulose compostable material having an air permeance not higher than 20 μm/(Pa·s), preferably not higher than 5 μm/(Pa·s) (according to ISO 5636); and   has a thickness of between 20 μm and 2.5 mm, preferably between 50 μm and 0.5 mm and, in a particularly preferred way, between 60 μm and 300 μm.   
     
     
         2 . The cartridge according to  claim 1 , wherein said cellulose material of the bottom is chosen from among parchment or surrogate parchment, Pergamyn, and moisture-proof paper. 
     
     
         3 . The cartridge according to  claim 1 , wherein said side wall and said bottom wall include a compostable material. 
     
     
         4 . The cartridge according to  claim 1 , wherein the bottom wall is made of a single piece with the side wall. 
     
     
         5 . The cartridge according to  claim 1 , wherein said bottom, exposed to the action of perforation of a bed of conical tips of a height of 3.5 mm and a diameter of the base of 3.9 mm that are made to advance through the bottom for an amount equal to 2.5 mm, is perforated over at least 25% of the positions where the aforesaid perforation tips are located.