Multilayer polyethylene film oriented in machine direction and article comprising same

The present disclosure provides a machine direction oriented polyethylene (MDO-PE) film, a laminate comprising the MDO-PE film, and a method of forming the MDO-PE film. The MDO-PE film includes a core layer comprising a first vinyl polymer, a skin layer comprising a second vinyl polymer, and a sub-skin layer between and in contact with the core layer and the skin layer. Each value of density, peak melting point, and weight percent crystallinity increases from the core layer to the sub-skin layer and from the sub-skin layer to the skin layer. The MDO-PE film further includes predetermined values of a ratio of weight percent crystallinity of the core layer to the skin layer and a ratio of peak melting points of the core layer to the skin layer. The MDO-PE film can be used in food packaging and other fields. 本公开提供了一种机器方向取向的聚乙烯(MDO-PE)膜、一种包含该MDO-PE膜的层压材料以及一种形成MDO-PE膜的方法。MDO-PE膜包括包含第一乙烯基聚合物的芯层、包含第二乙烯基聚合物的表层和位于芯层与表层之间并与芯层和表层接触的子表层。密度、峰值熔点和重量百分比结晶度的每个值从芯层到子表层以及从子表层到表层增加。MDO-PE膜进一步包括芯层与表层的重量百分比结晶度的比率和芯层与表层的峰值熔点的比率的预定