Laminate, packaging bag, and method for producing packaging bag

A packaging bag, comprising a front sheet and a back sheet facing the front sheet,

• wherein the front sheet and the back sheet each include at least a first resin layer and a second resin layer constituting an inner surface of the packaging bag, and the second resin layer contains a polyolefin as a main component,
• the first resin layer in the front sheet and the back sheet is provided so as to be separable from the second resin layer,
• the packaging bag has a sealed portion formed by joining a portion of the second resin layer in the front sheet and a portion of the second resin layer in the back sheet, and
• (1) the packaging bag is produced by directly making a bag from a film produced by deforming a tubular film produced by a coextrusion inflation method and including at least the first resin layer constituting a tube outer surface and the second resin layer constituting a tube inner surface into a flat shape or from a film produced by cutting the tubular film and stacking the cut films, and/or (2) a number of particles with a particle size of 0.2 μm or more adhering to the inner surface of the packaging bag is 100 particles/cm2 or less as measured with a particle counter.

A packaging bag comprising a laminate,

• wherein the laminate includes, in a thickness direction,
• a main body portion including a heat-fusible resin layer and
• a separable portion provided so as to be separable from the main body portion,
• the separable portion has a thickness of 10 μm or more,
• the packaging bag includes
• a front sheet formed of the laminate,
• a back sheet formed of the laminate,
• a sealed portion in which the heat-fusible resin layer of the front sheet and the heat-fusible resin layer of the back sheet are joined together, and
• a storage portion for storing a content,
• the packaging bag includes, in a plan view, a first side with a point A, a second side with a point B, and a corner portion including a vertex connecting the first side and the second side, and
• the packaging bag has a half-cut line extending from the point A on a line connecting the point A on the first side and the point B on the second side, and the half-cut line is provided from the point A to a middle of the line.