Portion capsule

Abstract

A portion capsule includes a base element, for example like a cup, having a capsule base and a circumferential side wall. A cover element is attached to the base element and forms together with the same an interior space having an extraction material region filled with an extraction material. A filter element is placed in the interior space. The filter element separates the extraction material region from the capsule base or from a capsule cover formed by the cover element. The filter element is formed of an open pore foam material.

1 . A portion capsule comprising a base element having a capsule base and a circumferential side wall, a cover element attached to the base element and together with the base element forming an interior space having an extraction material region filled with an extraction material, and a filter element disposed in the interior space and separating the extraction material region from the capsule base or from a capsule cover formed by the cover element, wherein the filter element is formed of an open pore foam material. 
     
     
         2 . The portion capsule according to  claim 1 , wherein the base element forms a circumferential flange and the cover element is attached to the base element along the circumferential flange. 
     
     
         3 . The portion capsule according to  claim 1 , wherein the foam material is an open pore polypropylene (PP) plastic. 
     
     
         4 . The portion capsule according to  claim 1 , wherein the foam material is biodegradable. 
     
     
         5 . The portion capsule according to  claim 1 , wherein the base element and/or the cover element is made of a biodegradable plastic. 
     
     
         6 . The portion capsule according to  claim 1 , wherein a material composition of the foam material corresponds to a material composition of the base element and/or of the cover element. 
     
     
         7 . The portion capsule according to  claim 1 , wherein the filter element directly contacts the capsule base or the cover element. 
     
     
         8 . The portion capsule according to  claim 1 , wherein the filter element is produced by cutting into slices a strand made of the foam material, wherein the filter element is one of said slices. 
     
     
         9 . A method for producing a portion capsule according to  claim 8 , wherein a filter element is produced by cutting into slices a strand made of a foam material, wherein one of said slices is placed in the base element as the filter element or is attached to the cover element, the base element is filled with the extraction material, and the cover element is then attached to the base element. 
     
     
         10 . The method according to  claim 9 , wherein the strand is produced by means of foam extrusion. 
     
     
         11 . The method according to  claim 9 , wherein a same material is used as the strand material as is used for the base element and/or the cover element.