MULTILAYER FILM AND PACKAGE

To provide a multilayer film having improved corner break prevention property, and a package using the same.SOLUTION: When four corner parts of a test piece are subjected to a drop test of overlapping 10 test sheets in the same direction to prepare a test piece, fixing the test piece to a horizontal...

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1. Verfasser: OKU SHINTARO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a multilayer film having improved corner break prevention property, and a package using the same.SOLUTION: When four corner parts of a test piece are subjected to a drop test of overlapping 10 test sheets in the same direction to prepare a test piece, fixing the test piece to a horizontal plane, and dropping a weight of a mass of 90 g to corner parts of the upward test piece on the horizontal plane from a height of 1 m of the test piece, a ratio of the number of the corner parts of the test sheet causing cracking to the total number of the corner parts of the test sheet is 20% or less, a sheet moisture vapor transmission rate is 0.30 g/mday or less, and a multilayer film has a barrier layer in which a non-stretched first film layer containing a first resin and a non-stretched second film layer containing a second resin different from the first resin are alternately repeatedly laminated, and at least one of the first resin and the second resin is a polyolefin-based resin.SELECTED DRAWING: Figure 1 【課題】角割防止性が改善された多層フィルムとこれを用いた包装体の提供。【解決手段】10枚の試験用シートを、同じ向きに重ね合わせて試験片を作製し、前記試験片を水平面上に固定し、水平面上において上向きの前記試験片の角部に対して、その上方1mの高さから、質量90gの錘を落下させる落下試験を、前記試験片の4個の角部すべてに対して行ったとき、前記試験用シートの角部の総数に対する、割れが生じた前記試験用シートの角部の数の割合が、20%以下となり、シート透湿度が0.30g/m2・day以下であり、第1の樹脂を含む未延伸の第1フィルム層と、前記第1の樹脂とは異なる第2の樹脂を含む未延伸の第2フィルム層と、を交互に繰り返して積層したバリア層を備え、前記第1の樹脂と前記第2の樹脂のうち少なくとも一方がポリオレフィン系樹脂である、多層フィルム。【選択図】図1