Production formula of water-based adhesive

In order to achieve satisfactory bonding effect, it is necessary to add a slightly viscous suspension emulsion containing pregelatinized starch into the emulsion of starch and water. This suspension emulsion can suspend raw starch in water to prevent its precipitation; Increasing the concentration is convenient for coating the rubber roller belt and forming a paste film with appropriate thickness on the roller; Adjust the viscosity so that the paper fibers can be properly wetted and begin to adhere; Ensure that there is a lot of water around the raw starch molecules, so that the starch can expand to the maximum extent when heated and completely gel; Caustic sodium must be added to adjust and control the gelatinization temperature of starch until it is the lowest.

In order to achieve satisfactory bonding effect, borax must be added to make the original starch absorb all the water available for absorption when heated; Make starch produce proper viscosity and toughness when gelatinizing; It acts as a buffer to prevent caustic soda from swelling a part of native starch at the lowest gelatinization temperature.