| 摘要 |
本发明提供一种多层膜与纸基材的积层体，及使用其的包装材，上述包装材为与纸的接着性良好、且无需特殊加工而用手撕裂便可简单地开启的手撕性良好的包装材，且上述积层体可较佳地用作由湿度所致的物性变化小、亦不产生卷曲、尺寸稳定性优异、积层加工或印刷加工或包装机械适性良好的包装材料。具体而言，本发明提供一种积层体，其特征在于将多层膜(I)的树脂层(A1)与纸基材(II)热熔接而成，上述多层膜(I)具有将树脂层(A1)、树脂层(B1)及树脂层(A2)以(A1)/(B1)/(A2)的顺序积层而成的多层构成，上述树脂层(A1)以Tg为130℃以上的环状烯烃系树脂作为主成分，上述树脂层(B1)以不含环状结构的烯烃系树脂作为主成分，上述树脂层(A2)以环状烯烃系树脂作为主成分。 A laminate of multilayer film and paper substrate, and a package material using the same are provided, wherein the package material has good adhesion to paper and good hand-tearing property, and can be easily torn by hands without needing a special process. The laminate is preferred to be used as a package material which has little variation of physical properties caused by humidity, generates no curl, has excellent size stability, and is suitable for laminate process, printing process or package machine. Specifically, a laminate is provided, which is characterized in that a resin layer (A1) of a multilayer film (I) is thermally fused with a paper substrate (II), wherein the multilayer film (I) has a multilayer structure obtained by laminating a resin layer (A1), a resin layer (B1) and a resin layer (A2) in a sequence of (A1)/(B1)/(A2). The resin layer (A1) has a cyclic olefin resin in which Tg is 130℃ |
