Preparation method of underwear back buckle and product

The invention relates to the technical field of underwear back buckles, in particular to a preparation method of an underwear back buckle and a product. Comprising the following preparation steps: 1) preparing glue: mixing waterborne polyurethane resin, inorganic filler, cellulose, a silane coupling agent, a softening agent, a curing agent, polyvinylpyrrolidone, polyvinyl alcohol, an antioxidant and water, and stirring at a high speed until the viscosity is 5000-8000 MPa.s; 2) gluing: coating the surface of a metal strip or an alloy metal strip with the glue prepared in the step 1), and curing to obtain a metal strip wrapped with a glue layer or an alloy metal strip wrapped with a glue layer; 3, the metal strip wrapped with the adhesive layer or the alloy metal strip wrapped with the adhesive layer is prepared into the underwear back buckle, by means of the preparation method, the metal strip or the alloy metal strip is wrapped with the adhesive layer, the metal strip or the alloy metal is isolated from being