| 摘要 |
<p>A bag made of a flexible packing material comprising a sheet of material having an inner face (9) and an outer face (8) and folded for the formation of a tube with an overlapping portion. In the overlapping portion the packing material is sealed inner face to outer face by means of a lapseal (10). Along two side edge portions (11, 12) the tube is welded inner face to outer face (side edge seals 13, 14), and outer face to inner face in the adjacent areas (15, 16) of the overlapping portion for obtaining a closed bag enclosing the packed product. The packing material provides a peel seal, when welded inner face to outer face, and a strong seal (fusion seal), when welded inner face to inner face. Seen relative to the bag, the packing material comprises an inner layer (17) comprising polyethylene (PE), an outer layer (18) comprising a copolymer of polyethylene (PE) and polypropylene (PP) and a subjacent intermediate layer (19) comprising polypropylene (PP).</p> |
