Sealant film for cell pouch having gradient composition type barrier properties cell pouch including the same and method for preparing the same

摘要

Disclosed are a sealant film for a gradient composition type cell pouch in which the elastomer content of each sealant layer is gradually different as a sealant film having a sealant layer having a multilayer structure of two or more layers, a cell pouch including the same, and a method for manufacturing the same. In order to prevent the disadvantages of lower crystallinity and chemical resistance when applying elastomer to the sealant layer of the cell pouch, the sealant layer is composed of multiple layers and the amount of elastomer is gradually adjusted in each layer to improve chemical resistance and improve insulation resistance. can do. In addition, it is possible to implement high sealing properties and high barrier properties having excellent thermal bonding strength and barrier layer adhesion properties.