Polyvinylpyrrolidone (PVP) is a remarkable polymer known for its versatility, but its performance characteristics are often dictated by its molecular weight, which is typically indicated by its K-value. NINGBO INNO PHARMCHEM CO.,LTD. supplies a range of PVP grades, and understanding the significance of these K values is key to selecting the optimal product for your application.

The K-value of PVP, derived from the Fikentscher equation, is a measure of its relative viscosity in an aqueous solution. This viscosity is directly related to the polymer’s molecular weight. Generally, a higher K-value indicates a higher molecular weight and, consequently, greater viscosity, adhesive strength, and film-forming rigidity.

Lower K-value grades, such as PVP K15 and K30, typically have lower molecular weights and lower solution viscosities. These grades are often preferred for applications where lower viscosity is beneficial, such as in liquid formulations, sprays, or where moderate binding and film-forming properties are sufficient. For instance, PVP K30 is widely used in cosmetics for its film-forming and thickening properties, offering a balance between hold and flexibility.

PVP K90, on the other hand, represents a high K-value grade with a significantly higher molecular weight. This translates into higher viscosity, stronger adhesive properties, and more rigid film formation. PVP K90 is extensively used in pharmaceuticals as a binder in tablets and capsules, where its strong binding capacity is essential for product integrity. In cosmetics, its robust film-forming ability is utilized in styling products requiring strong, long-lasting hold.

Choosing the right PVP K grade depends entirely on the specific requirements of the application. Factors such as desired viscosity, binding strength, film flexibility, and solubility characteristics must be considered. NINGBO INNO PHARMCHEM CO.,LTD. provides expert guidance to help clients navigate these choices, ensuring they select the PVP K grade that will deliver optimal performance and meet their product development goals.

Our comprehensive selection of PVP grades, from lower K values to high-performance K90, empowers formulators across various industries to achieve exceptional results. Partner with NINGBO INNO PHARMCHEM CO.,LTD. to leverage the full potential of Polyvinylpyrrolidone for your innovative product development.