NINGBO INNO PHARMCHEM CO.,LTD offers a comprehensive portfolio of Hydroxypropyl Methyl Cellulose (HPMC) grades, each meticulously designed to meet diverse industrial requirements. Understanding the different series, particularly the E and K series, and their associated viscosity levels is key to selecting the optimal HPMC for specific applications, from construction materials to pharmaceutical excipients.

HPMC is broadly classified into different grades based on its viscosity, typically measured in mPa.s (or cP) for a 2% aqueous solution. The primary series encountered are the E series and the K series, alongside others like the F series. These viscosity variations dictate how effectively HPMC performs its functions as a thickener, binder, stabilizer, and water-retaining agent.

The E series of HPMC grades, such as E3, E4, E5, E6, E15, and E50, generally represent lower viscosity products. These grades are particularly favored in applications where moderate thickening is required, or where they act primarily as film-formers or binders. For instance, in pharmaceutical applications, lower viscosity grades like HPMC E5 are commonly used in tablet film coating powders due to their excellent film-forming properties and ease of processing. In food applications, these grades can act as emulsifiers and stabilizers, contributing to the desired texture without excessive thickening.

The K series, including grades like K4M, K100, K100M, and K15M, typically denotes higher viscosity products. The 'M' in K100M, for example, signifies a higher molecular weight and thus a significantly higher viscosity. These high-viscosity grades are extensively used in the construction industry, where superior water retention and thickening are paramount. HPMC K100 and K100M are popular choices for dry mix mortars, tile adhesives, and wall putties, providing enhanced workability, improved adhesion, and better resistance to cracking. Their strong water-retaining capability ensures optimal hydration of cementitious materials.

Beyond these, specialized grades like E4M and K4M are also available, offering intermediate or specific performance characteristics. The nomenclature often indicates the intended application or a combination of properties. For example, the viscosity in the product name (e.g., K100) directly relates to its thickening power.

NINGBO INNO PHARMCHEM CO.,LTD provides detailed technical specifications for each HPMC grade, enabling clients to make informed decisions. Whether you are developing pharmaceutical formulations requiring precise controlled release, food products needing specific textures, or construction materials demanding robust water retention, understanding and selecting the correct HPMC viscosity grade is critical. For those looking to buy HPMC, we offer guidance to ensure you acquire the most suitable product for your specific needs, thereby optimizing your formulation's performance.