| 摘要 |
PURPOSE:To prevent damages to adjoining articles by a method wherein, in a package with article such as the fruit liable to damage wrapped by heat sealing and shrinking a heat-shrinkable sheet and film, the projecting ends of the four corners of the package are softened by restricting the packaging material in use. CONSTITUTION:A plurality of articles 1 such as tangerines are covered with a heat-shrinkable polypropylene film 2 having at least one heat-sealing layer constituted of polyethylene resin formed on its upper surface and the surface of the articles 1 on the flange side is covered with a heatshrinkable foam plastic sheet 3 having a non-foam layer as foam layer and heat sealing layer. The four sides of the articles 1 are heat sealed in lines along the edges 21 and 31 of these coverings and then shrunk to obtain a heat-shrunk package. To accomplish this, the sheet 3 is formed of polypropylene resin or a thermoplastic resin smaller in bending elastic modulus than the polypropylene resin and the bending elastic modulus and thickness of each layer resin are set to satisfy a specific expression. |
