Membrane for stock solution cryopreservation and preparation process thereof

The invention discloses a membrane for stock solution cryopreservation and a preparation process of the membrane, and relates to the technical field of multilayer membranes. The main body sequentially comprises a thermoplastic elastomer layer, a first molecular structure bonding layer, a first ultra-low density polyethylene layer, a second molecular structure bonding layer, an ethylene-vinyl alcohol copolymer layer, a third molecular structure bonding layer and a second ultra-low density polyethylene layer from outside to inside, the content materials can be directly contacted; the thermoplastic elastomer layer is used for ensuring that good elasticity and flexibility can still be maintained at extremely low temperature; the technical effects that the whole film has relatively high toughness and is relatively stable in a low-temperature environment are achieved. 本申请公开了一种用于原液冻存的膜及其制备工艺，涉及多层膜技术领域，包括主体，主体由外至内依次包括热塑性弹性体层、第一分子结构黏合层、第一超低密度聚乙烯层、第二分子结构黏合层、乙烯-乙烯醇共聚物层、第三分子结构黏合层、第二超低密度聚乙烯层，其中，第二超低密度聚乙烯层为最内层，用于直接接触内容物料；热