The invention discloses an edible biological
preservative film and a preparation method thereof. The edible biological
preservative film comprises the following components in parts by weight: 30-60 parts of a film former, 1-10 parts of a natural
antioxidant, 1-10 parts of a natural bacterial inhibitor, 1-4 parts of a
plasticizer and 0.5-4 parts of an emulsifier. The preparation method comprises the following steps: mixing the components in proportion to form
preservative film liquid, and preparing the preservative film by adopting a tape-
casting process. According to the preservative film, excellent film forming performances of materials such as marine polysaccharides,
chitosan,
gelatin and the like are utilized, the natural
antioxidant and the natural bacterial inhibitor are selected and used, and the modification process is carried out through the
plasticizer, the emulsifier and the like, so that the prepared preservative film is good in
mechanical property, delays the spoilage of an
aquatic product and can effectively prolong the
shelf life of the
aquatic product.