Container for producing a beverage capsule and capsule thereof
A container for producing a beverage capsule containing a beverage ingredient has a formed laminated structure including a cup portion with a depth-to-width ratio of at least 0.3 and a peripheral flange. The laminated structure contains an aluminium foil as a middle layer and also contains a sealing layer on the inner side of the aluminium foil. The laminated structure also includes at least one outer polymer film laminated on the outer side of the aluminium foil using a laminating adhesive layer, and the outer polymer film is printed at its inner surface and is made of semi-crystalline polymer.
1. A method for producing a container, the method comprising:
providing a deep-drawable packaging film comprising:
an aluminium foil as a middle layer,
a sealing layer on the inner side of the aluminium foil,
at least one outer polymer film laminated on the outer side of the aluminium foil by a laminating adhesive layer, wherein the at least one outer polymer film is printed at an inner surface of the at least one outer polymer film and is made of semi-crystalline polymer; and
forming the deep-drawable packaging film to a structure comprising a cup portion and a peripheral flange, wherein the cup portion has a depth-to-width ratio of at least 0.3.
2. The method according to claim 1 , wherein the at least one outer polymer film is semi-crystalline, has a degree of crystallization between 20 and 70%, and has Young's modulus of 2000 MPa to 2700 MPa.
3. The method according to claim 1 , wherein the deep-drawable packaging film has a stress at break between 40 and 55 MPa.