Plastic film bag, such as a tamper-proof plastic film bag, blank for a plastic film bag and use of the plastic film bag as transport and/or packaging container

A plastic film bag, comprising:

• a plastic film front wall with an inner and an outer face and with a first side edge and an opposite second side edge as well as an upper and an opposite lower edge and with a bag opening, spaced apart from the upper edge, with a bag opening edge, which extends between the first side edge of the plastic film front wall and the second side edge of the plastic film front wall,
• a plastic film rear wall with an inner and an outer face and with a first side edge and an opposite second side edge as well as an upper and an opposite lower edge, and
• a bag bottom,
• wherein the plastic film front wall and the plastic film rear wall are connected to each other between their upper edges and the bag opening edge via at least one connecting area, which extends between the first side edges of the plastic film front wall and the plastic film rear wall and the second side edges of the plastic film front wall and the plastic film rear wall, and further comprising:
• at least one first adhesive area, which extends below the connecting area on the inner face of the plastic film rear wall between the first side edge of the plastic film rear wall and the second side edge of the plastic film rear wall and which has a width (A) transverse to this extension, the plastic film front wall and the plastic film rear wall each having a section which lies below the first adhesive area,
• wherein the plastic film front wall and the plastic film rear wall at their respective first side edges merge into one another in one piece in that section which lies below the first adhesive area,
• wherein the plastic film front wall and the plastic film rear wall in the region of their second side edges are bonded or welded to one another in that section which lies below the first adhesive area,
• wherein the one-piece transition from the plastic film front wall to the plastic film rear wall in the region of their first side edges is formed as a fold or crease,
• wherein the film material of the plastic film front wall and the plastic film rear wall comprises or consists of polyolefins,
• wherein the plastic film front wall, the bag bottom, and the plastic film rear wall are formed in one piece,
• wherein the plastic film front wall and the plastic film rear wall at their respective first side edges do not merge into one another or are not connected to each other in that section which lies in the region of the first adhesive area and extends up to the bag opening edge;
• and
• wherein the plastic film front wall and the plastic film rear wall at their respective second side edges do not merge into one another or are not connected to each other in that section which lies in the region of the first adhesive area and extends up to the bag opening edge,
• wherein the plastic film front wall in the region from the bag opening edge in the direction of the bag bottom, in which the first and second side edges of the plastic film front wall are not connected to the first and second side edges of the plastic film rear wall or do not merge into one another, forms a fold-over closure flap with a width (C),
• wherein the first adhesive area is present on the inner face of the plastic film rear wall in a region which can be brought into contact with the fold-over closure flap when the fold-over closure flap is folded upward away from the bag bottom toward the bag opening edge, and
• wherein the width (A) of the first adhesive area is smaller than or equal to the width (C) of the fold-over closure flap.