The papermaking industry constantly seeks innovations to improve the quality and durability of paper products. Among the key advancements is the development and application of effective wet strength agents. Central to the production of these vital agents is the WSR intermediate, a crucial chemical component that enables superior performance in demanding applications.

WSR intermediate, often described as a polyamide aqueous solution, is manufactured through a precise process involving dibasic acid and polyamine. This synthesis, typically conducted at high temperatures with a catalyst, yields a stable solution that serves as the foundation for more complex polymers. The primary function of this intermediate is to react with epichlorohydrin, a common chemical reactant, to form polyamide-epichlorohydrin (PAE) polymer aqueous solutions. These PAE solutions are renowned for their exceptional ability to impart wet strength to paper – the capacity of paper to retain its integrity and strength even when saturated with water.


For papermaking companies looking to buy this essential raw material, understanding its properties is key. The WSR intermediate is characterized by its light yellow transparent liquid appearance and a solid content of at least 40%. Its pH typically ranges between 7 to 10, and its viscosity is maintained within a specific range, ensuring ease of handling and processing. The shelf life is generally around 6 months, although proper storage in a cool, dry place is essential to maintain its quality. As a reliable manufacturer and supplier, NINGBO INNO PHARMCHEM CO.,LTD. ensures that the WSR intermediate produced meets stringent quality standards, allowing for consistent and predictable results in wet strength agent synthesis.


The advantages of using a high-quality WSR intermediate are manifold. By controlling the reaction process and ensuring a higher degree of polymerization, manufacturers can produce wet strength agents that not only offer superior wet strength effects but also possess excellent storage stability. This means that the final wet strength additive will perform reliably over time, maintaining its efficacy. Furthermore, the availability of this intermediate simplifies the production process for paper chemical manufacturers, making it more accessible to integrate advanced strength-enhancing additives into their product lines. Seeking the best price for WSR intermediate can lead to significant cost savings without compromising on quality, especially when sourcing from reputable suppliers in China.


The application of WSR intermediate extends beyond just creating wet strength agents. It is a versatile chemical auxiliary used in various paper processing chemicals. The demand for high-performance paper products, such as those used in food packaging, currency, and specialty printing, continues to grow, driving the need for robust wet strength solutions. As a leading supplier, NINGBO INNO PHARMCHEM CO.,LTD. is committed to supporting the papermaking industry by providing this essential chemical intermediate. Whether you are looking to purchase WSR intermediate or seeking a dependable manufacturer, our expertise ensures you receive a product that meets your precise requirements for paper strength enhancement.