Nisin oral refreshing and tasting chips and preparation method therefor

The present invention provides nisin oral refreshing and tasting chips and a preparation method therefor, belonging to the technical field of leisure foods. The oral refreshing and tasting chips are prepared from the following raw materials: food-grade pulullan, an auxiliary member agent, a high sweetening agent, an emulsifier, nisin, menthol, caramel pigment and citric acid. The preparation method comprises: firstly, food-grade pulullan and the auxiliary member agent are slowly added into water at 60-70 DEG C to get dissolved and swelled, and the solution is stirred at the same time; the PH is adjusted with a moderate amount of citric acid, afterwards, the solution is allowed to stand to obtain a glue solution; nisin, the edible pigment and menthol are added into glue solution which is stirred evenly prior to standing; the emulsifier is added with stirring, the solution is cooled down to room temperature, so that bubbles in a membrane solution are removed; and an organic glass sheet is coated with the membrane solution, then the member gets dry and gets stripped, thereby obtaining the oral refreshing and tasting chips. The oral refreshing and tasting chips provided by the invention can effectively restrain the growth of streptococcus mutans and lactobacillus in the process of occurrence of dental caries; the product can effectively prevent dental caries caused by bacteria breeding, and without long-term chewing, also eliminate bad breath and keep oral cavity fresh and sanitary.