阅读说明：本技术 用于热封的双轴定向聚丙烯膜 (Biaxially oriented polypropylene film for heat sealing ) 是由 樊玲 石洪涛 M·索利曼 覃杉 崔胜明 P·加尔格 J·C·J·F·塔克斯 于 2019-10-17 设计创作，主要内容包括：本发明涉及一种包括多个共挤出膜层的膜,所述膜具有长度和宽度以及厚度,所述厚度被定义为垂直于由所述长度和所述宽度界定的平面的所述膜的尺寸,其中所述膜是包括至少芯层A和一个或两个密封层B的双轴定向膜,所述芯层A具有第一表面和第二表面,其中所述芯层A包含聚丙烯,并且其中所述密封层B包含相对于所述密封层B的总重量计>50.0重量％的聚乙烯,所述聚乙烯包含衍生自乙烯的结构部分和衍生自包含4至10个碳原子的α-烯烃的结构部分,所述聚乙烯具有根据ASTM D1505(2010)测定的≥870且≤920kg/m～3的密度,其中所述密封层B直接粘附于所述芯层A的所述第一表面或第二表面中的一者。这种膜允许在降低的密封温度、也被称为密封起始温度下生产具有足够高密封强度的密封包装。(The present invention relates to a film comprising a plurality of coextruded film layers, said film having a length and a width and a thickness, said thickness being defined as the dimension of the film perpendicular to a plane defined by the length and the width, wherein the film is a biaxially oriented film comprising at least a core layer a and one or two sealing layers B, said core layer a having a first surface and a second surface, wherein the core layer a comprises polypropylene and wherein the sealing layers B comprise a polypropylene relative to the total weight of the sealing layers B>50.0 wt% of a polyethylene comprising moieties derived from ethylene and moieties derived from alpha-olefins comprising from 4 to 10 carbon atoms, the polyethylene having a composition according to ASTM D1505 (201)0) Measured more than or equal to 870 and less than or equal to 920kg/m 3 Wherein the sealing layer B is adhered directly to one of the first or second surfaces of the core layer a. Such films allow the production of sealed packages with sufficiently high seal strength at reduced sealing temperatures, also referred to as seal initiation temperatures.)