Membrane, membrane element and preparation method thereof

The invention relates to a membrane which comprises a support layer and an abutting layer, wherein the support layer is provided with a middle part, a liquid generating closed edge and a liquid generating channel edge; the abutting layer is positioned on the support layer and has a connecting edge connected with the liquid generating channel edge; the binding force between the connecting edge andthe liquid generating channel edge is greater than the binding force between the abutting layer and the middle part. The invention also relates to a membrane element including the membrane and a method of preparing the membrane and the membrane element. 本发明涉及种膜，其包括：支撑层，其具有中间部、产液封闭边缘和产液通道边缘；以及，位于所述支撑层上的邻接层，其具有与所述产液通道边缘连接的连接边缘，所述连接边缘和所述产液通道边缘之间的结合力比所述邻接层与所述中间部之间的结合力更强。本发明也涉及包含膜的膜元件、以及制备膜和膜元件的方法。