| 摘要 |
PROBLEM TO BE SOLVED: To ensure necessary and sufficient breathability for a packaging bag while making a good external appearance with articles housed therein by a method wherein side seal parts each made up by welding each of seal tape pieces made of synthetic resin film and each of ribbon parts of obverse and reverse net sheet parts together are provided along the edges on both sides of the packaging bag composed of specified obverse and reverse net sheet parts. SOLUTION: Obverse and reverse net sheet parts 2 and 3 are constructed respectively of an expandable/contractile meshed sheet made up integrally in crossing of a number of monofilamentlike filaments 15 each approximately in a circular or oval section. Seal tape pieces 18 made of synthetic resin film are provided along the edges on both sides of a bag body 1 for forming side seal parts 6 and 6 at the edges on both sides of the bag body 1, and the side seal parts are formed by welding the seal tape pieces 18 and ribbon parts of the obverse and reverse net sheet parts 2 and 3 together. Therefore, freshness can be satisfactorily maintained for articles that require especially breathability, and the packaging bag can be maintained, with its periphery kept entirely in a form resembling to its original shape of rectangle while housing the articles therein, and the articles can be arranged in good appearance when displayed. |
