PLASTIC POURER (SPOUT) FOR SELF-STANDING BAG PACKS, SELF-STANDING BAG PACK AND PRODUCTION METHOD

摘要

The invention relates to a plastic pourer (1) (spout) for self-standing bag packs, in particular for beverages, with a sealing zone (3) for fixing the plastic pourer (1) to a self-standing bag pack with a pouring tube (4), having an inner surface (7), with an inlet opening (7) and an outlet opening (9), wherein the ratio between a length of the pouring tube (4) and a pouring tube diameter is greater than 1, preferably greater than 2, and wherein the plastic pourer (1) is coated with a barrier layer (10) which can be produced in particular in a vacuum, preferably by a CVD or PVD process, and is intended for increasing the penetration barrier action against at least one chemical compound and/or at least one chemical element on the inner surface (7) of the pouring tube (4) and on a surface (11) of the sealing zone (3). According to the invention, it is provided that, for better sealability, the surface (11) of the sealing zone (3) has, in particular in a proportion by area of at least 50%, a higher average surface roughness R_a to DIN EN ISO 4288:1998 than the average surface roughness R_a to DIN EN ISO 4288:1998 preferably of at least 50% of the proportion by area of the inner surface (7) of the pouring tube (4), and that the surface of the sealing zone (3) has an average surface roughness R_a to DIN EN ISO 4288:1998 of at least 200 nm Ra.