PROBLEM TO BE SOLVED: To provide a packaging material capable of restraining rice-processed food, for example, from losing its shape in unsealing, and capable of suppressing tearing of sheet-like food.SOLUTION: This packaging material comprises an outer film which is constituted in such a manner as to be dividable in the width direction, and an inner film which is superposed on the outer film via the sheet-like food and in which a rupture assisting means linearly elongated in the direction orthogonal to the width direction is formed. The inner film is characterized in that it is equipped with a center film portion in which the rupture assisting means is formed, a pair of expansion film portions which are continuously provided at both side ends of the center film portion and constituted in such a manner as to be expandable in the width direction, and a pair of side film portions which are extended out to the outside of the width-direction from a leading end of each of the expansion film parts.COPYRIGHT: (C)2009,JPO&INPIT【課題】 開封時に米飯加工食品が型くずれ等を起こしたり、シート状食品が破れたりするのを抑制することのできる包装材を提供する。【解決手段】 幅方向に分割可能に構成された外フィルムと、外フィルムにシート状食品を介して重ね合わされる、幅方向と直交する方向に線状に延びる破断補助手段が形成された内フィルムとを備えた包装材において、内フィルムは、破断補助手段の形成されたセンターフィルム部と、センターフィルム部の両側端に連設され、幅方向に拡張可能に構成された一対の拡張フィルム部と、各拡張フィルム部の先端から幅方向外側に延出する一対のサイドフィルム部とを備えていることを特徴とする。【選択図】図1
