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The field of high temperature tape industrial adhesive applied to many types of different industrial products have targeted the use of adhesives, more often used to nitro adhesive glue, epoxy glue, starch glue, phenolicadhesives below we list several adhesive, and make a detailed overview of its methods of identification.
    (1) nitro gum authentication method: as a reagent to a solution of diphenylamine (O.1 g of diphenylamine was dissolved in 30 ml of water and 100 ml of concentrated solution), the film is placed in the drip plate, add one drop of Reagent , such as dark blue, which means that the plastic is nitro.

    (2) an epoxy resin glue authentication method: 5 drops of concentrated nitric acid in the resin film, placed after a few minutes, the reaction was transferred to a test tube was added 5 ml of acetone, and then added a 0.05N potassium hydroxide in alcohol solution, so that it was alkaline, if there is color from red to purple, indicating a bisphenol A type epoxy resin glue.

    (3) methods of identification of starch glue: adhesive layer with an alcohol solution (alcohol: water 1: l volume) and humid, collected in a test tube.

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