Development/ Research

AKD sizing agents are key chemicals used in papermaking to enhance paper's resistance to liquid penetration (such as water and oil). They are applied either within the pulp or at the paper surface to improve [...]

Introduction Internal sizing agents are key chemicals added directly to paper pulp to impart resistance against liquid penetration (e.g., water and oil) by binding to fibers. In papermaking, the selection and precise addition of these [...]

I. Classification and Mechanism of Biocides 1. Biocide Classification in Papermaking In the papermaking industry, a wide variety of biocides are used. Based on molecular structure, they can be clearly divided into two major categories: [...]

I. Chemical Classification and Mechanism of Dry Strength Agents Cationic Starch Molecular Structure: Cationic starch is modified through etherification by introducing quaternary ammonium groups (such as 2,3-epoxypropyltrimethylammonium chloride), with a typical degree of substitution (DS) [...]

Introduction Defoamers—also known as antifoaming or foam control agents—are substances that reduce surface tension and possess high surface activity to inhibit or eliminate foam in industrial processes. In many industrial settings, unwanted foam can severely [...]

Introduction In today’s paper industry—characterized by excess capacity and intense competition—the visual appearance of paper not only determines its aesthetic appeal but also plays a critical role in market competitiveness. Through effective process control, paper [...]

Introduction In the papermaking process, the dry strength of paper directly affects its overall quality and performance. To meet the market demand for high-strength and durable paper, various strengthening methods have emerged. Among them, cationic [...]

Introduction In today’s market—with excess production capacity and fierce competition—the need to enhance the functionality and specialty of paper has become an urgent demand for industry transformation. As the global “dual carbon” goals progress and [...]