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Application Advantages Of Waterborne Adhesive Materials

      In the packaging and printing industry, with the development of composite flexible packaging, reducing and removing organic solvents in composite has become the direction of joint efforts of the whole industry. At present, the composite methods that can completely eliminate the solvent include aqueous composite and solvent-free composite. Solvent free compounding is still in its infancy due to the influence of cost technology and other factors.Application Advantages Of Waterborne Adhesive Materials

     The water-based adhesive can be directly used in the existing dry laminating machine, so it is welcomed by domestic flexible packaging manufacturers. At present, it has made rapid development abroad.Application Advantages Of Waterborne Adhesive Materials.Application Advantages Of Waterborne Adhesive Materials

Application Advantages Of Waterborne Adhesive Materials

      Aqueous compounding can be divided into dry compounding and wet compounding. Wet compounding is mainly used in paper plastic and paper aluminum compounding, and white latex is popular in this field.Application Advantages Of Waterborne Adhesive Materials

     In plastic plastic composite and plastic aluminum composite, water-based polyurethane and water-based acrylic polymers are mainly used. Water based adhesives have the following advantagesApplication Advantages Of Waterborne Adhesive Materials

(1) High composite strength. The molecular weight of water-based adhesive is large, which is dozens of times that of polyurethane adhesive. Its adhesion mainly depends on van der Waals force, which belongs to physical adsorption, so a small amount of glue can achieve quite high composite strength.Application Advantages Of Waterborne Adhesive Materials

       For example, compared with two-component polyurethane adhesive, the composite strength of two-component polyurethane adhesive with 2.6g/m2 dry adhesive can be achieved by coating 1.8g/m2 dry adhesive in the composite process of aluminum coating.Application Advantages Of Waterborne Adhesive Materials

(2) Soft, more suitable for the composite of aluminum coating. One component waterborne adhesive is softer than two-component polyurethane adhesive. When they are completely solidified, polyurethane adhesive is very hard, while waterborne adhesive is very soft. Therefore, the softness and elasticity of water-based adhesive are more suitable for the composite of aluminized film, which is not easy to cause the transfer of aluminized film.Application Advantages Of Waterborne Adhesive Materials

(3) It does not need to be cooked. It can be cut after getting off the machine. The single component water-based adhesive composite does not need to be matured, and subsequent processes such as cutting and bag making can be carried out after getting off the machine. This is because the water-based adhesive has high initial bonding strength, especially shear strength, which ensures that there will be no problems such as “tunnel” and fold in the process of compounding and slitting. Moreover, the strength of the film compounded with water-based adhesive can be increased by 50% after being placed for 4 hours. This is not the concept of aging. The colloid itself is not crosslinked. The composite strength increases with the leveling of the colloid.Application Advantages Of Waterborne Adhesive Materials

(4) The adhesive layer is thin and transparent. Because the amount of water-based adhesive is small and the concentration of water-based adhesive is higher than that of solvent-based adhesive, the water to be dried and discharged is far less than that of solvent-based adhesive. After the moisture is completely dried, the adhesive film will become very transparent. Because the adhesive layer is thin, the transparency of the composite is also better than that of the solvent adhesive.Application Advantages Of Waterborne Adhesive Materials

(5) Environmental protection, harmless to people. There is no solvent residue after the water-based adhesive is dried. Many manufacturers use water-based adhesive to avoid the residual solvent caused by compounding. Therefore, the use of water-based adhesive is safe and does no harm to the health of operators.Application Advantages Of Waterborne Adhesive Materials


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