White polyether block polyamide waterproof and moisture permeable film and preparation method thereof

The invention relates to the related field of waterproof and moisture-permeable films, in particular to a white polyether block polyamide waterproof and moisture-permeable film and a preparation method thereof. The film comprises the following components in percentage by weight: 78-90% of polyether block PA11 resin, 7-12% of open smooth master batch and 10-20% of white master batch. The method comprises the following steps: firstly, putting 10-20% of diatomite and 3-5% of wax into an extruder by taking polyether block polyamide resin as a carrier, granulating to prepare open smooth master batch, fusing 45-70% of titanium dioxide and taking polyether block PA11 resin as a carrier, putting into the extruder, granulating to prepare white master batch, and granulating to prepare the open smooth master batch. The preparation method comprises the following steps: firstly, preparing polyether block PA11 resin, then drying 78-90% of polyether block PA11 resin, 7-12% of open smooth master batch and 10-20% of white mas