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Take organic pressure-sensitive adhesives as an example: the quality of a pressure-sensitive adhesive can be evaluated from five aspects: adhesion strength, drying speed, viscosity, solid content, and pH value.

The type of failure observed during a pressure-sensitive adhesive peel test is just as important as the results of the peel test itself.

An increase in the polarity of pressure-sensitive adhesive molecules can significantly enhance the peel strength of pressure-sensitive adhesive products when bonding to polar substrates.

The polarity of pressure-sensitive adhesive molecules not only enhances the intermolecular interaction forces at the adhesive interface and improves the interfacial adhesion conditions, thereby increasing the work of adhesion at the interface. It also alters the mechanical and rheological properties of the pressure-sensitive adhesive layer—for example, by boosting cohesive strength and elastic modulus, and improving resistance to peel-off and bulk viscosity. All these factors influence the 180° peel strength and other adhesive performance characteristics of pressure-sensitive adhesives.

From June 25 to 26, 2019, the 3rd International Conference on Pressure-Sensitive Adhesive Technology was grandly held in Huishan, Wuxi. The conference was jointly initiated by the Management Committee of the Wuxi Huishan Economic Development Zone in Jiangsu Province, the School of Chemical Engineering and Chemistry at Harbin Institute of Technology, and the University of West Coast Poland/National Adhesive Center of the University of West Coast Poland, and was organized by the Wuxi New Materials Research Institute of Harbin Institute of Technology.