Kyoraku Co., Ltd.

Orihiro Co., Ltd.

Shinji Matsunaga

Orihiro Tsuruta

Tomohiro Uesugi

Provided is a packaging bag which can prevent a colorant contained in a multilayer film from staining a packaged object, as well as has high mechanical strengths such as high impact resistance and high pinhole resistance. In a packaging bag formed by forming a multifold film into a bag shape, the multifold film being formed by stacking a plurality of multilayer films, a colorant is contained in a layer of the multilayer films, the layer containing the colorant being not in contact with an object to be packaged. For example, the multifold film comprises two stacked multilayer film formed by flattening a tubular multilayer film. For example, the colorant is an inorganic pigment.

Packaging bag

Provided is a packaging bag which can prevent the entry of water between a handle and a body, as well as can maintain proper degrees of easy-opening properties and bag-break strength. A packaging bag includes an easy-peel seal. The seal includes first regions in which multiple belt-shaped seals are spaced from each other in the width direction and second regions in which a single belt-shaped seal is disposed. The first regions and second regions are alternately disposed adjacent to each other in the length direction of the belt-shaped seals. The single belt-shaped seal in each second region has a wide width so that the multiple belt-shaped seals in the adjacent first regions can be connected to the single belt-shaped seal.

A filling-packaging body formed to have both such a durability that can withstand a large amount of filled material filled therein and easily unsealing property. The filling-packaging body () is formed by filling the filled material in a three-side seal bag having an overlapped part formed by cylindrically curving a laminated film () and overlapping both side edge parts of the laminated film, a plurality of vertical seal parts () and () (two seal parts are shown) formed at the overlapped part roughly parallel with each other in such a state that a band-like non-seal part () is left at the tip side of the outer surface side-edge part of the overlapped part, and lateral seal parts () and () formed to cross the longitudinal both end parts of the vertical seal parts () and (). The laminated film () is formed by interposing a base material layer () for imparting strength to the film between an inner layer () and an outer layer () which are seal layers formed of a low density polyethylene.

Material-filled package

A tubular film is flattened to form a continuous two-ply film in which the two side edges are continuously connected in the longitudinal direction. This two-ply film is curved into a tubular form, the two side edges are overlapped, and a vertical seal portion is formed in the overlapping portion to form a tube body, and the tube body is filled with a product. The tube body that has been filled with product is horizontally sealed, and the horizontal seal portion that has been thus formed is cut to produce a two-ply bag package.

Growing community of inventors

Fukuoka, Japan

Shinji Matsunaga