It is made from soy bean meal and pulverized into 100-300 mesh soy flour. Its protein content is 40-50%. Bean protein is a globulin, and its protein molecule contains a polar gene, which is bonded to a hydrogen bond inside the molecule to make the molecule spiral. When making the glue, a small amount of sodium hydroxide solution should be added to destroy the hydrogen bond, so that the protein molecule has a free polarity gene and is dispersed in the water, and the glue layer is glued when the water is evaporated. The addition of water glass controls the viscosity of the glue and extends the usable time of the glue. The addition of calcium hydroxide to react with the protein becomes an irreversible substance, which improves the water resistance of the glue. Mixing styrene-butadiene or nitrile emulsion with soybean gum can obtain a water-resistant, viscous, tough rubber layer and shorten the pressing time. Soybean gum is mainly used for cold-pressing veneers with a moisture content of 15-20%. It is odorless and tasteless and is suitable for gluing food packaging materials such as tea boxes. Lowe Insulated Glass,Acid Etched Glass,Window Insulated Glass,Sound Proof Insulated Glass SHANDONG TOP LEADER GLASS CO.,LTD , https://www.topleaderglass.com