Pharmaceutical tablet coating is a vital step in drug manufacturing, improving drug stability, masking taste, controlling release, and enhancing patient compliance. Hypromellose (HPMC) is a widely recognized and utilized polymer in film-coating systems due to its excellent film-forming capabilities, good solubility, and versatility. NINGBO INNO PHARMCHEM CO.,LTD., a prominent supplier of pharmaceutical excipients, outlines the crucial role of HPMC in achieving superior tablet coatings.

HPMC functions as the primary film-forming agent in many aqueous and solvent-based coating systems. When applied as a fine spray onto tablets, the HPMC solution dries to form a coherent, flexible, and often transparent film. This film serves multiple purposes: protecting the API from environmental factors like moisture and light, facilitating easier swallowing, and providing a smooth surface for printing or branding. Manufacturers seeking to buy HPMC for coatings often prioritize grades that offer consistent film integrity and application ease.

Key Properties of HPMC for Tablet Coatings:

  • Excellent Film Formation: HPMC readily forms smooth, uniform films with good tensile strength and elasticity, minimizing the risk of film cracking or chipping.
  • Water Solubility: Its solubility in cold water makes it suitable for environmentally friendly aqueous coating systems, reducing the need for organic solvents.
  • Controlled Release Capabilities: Certain HPMC grades can also be formulated into coatings that control the release of the drug, offering an alternative to matrix systems.
  • Compatibility: HPMC is compatible with a wide range of plasticizers, pigments, and other excipients commonly used in coating formulations, allowing for tailored coating properties.

The selection of the appropriate HPMC grade for tablet coating depends on several factors, including the desired film properties, the tablet core characteristics, and the chosen coating process. Lower to medium viscosity grades, such as E5, E6, E15, and E50, are commonly used for standard film coatings. For specialized coatings, such as enteric coatings or controlled-release coatings, specific HPMC phthalate or other modified grades might be necessary. NINGBO INNO PHARMCHEM CO.,LTD. provides a comprehensive portfolio of HPMC, enabling manufacturers to buy the precise grade required for their coating applications.

As a trusted pharmaceutical intermediate supplier, NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to providing pharmaceutical manufacturers with high-quality, BSE-free, and TiO2-free Hypromellose. We offer competitive pricing and technical support to help you achieve optimal results in your tablet coating processes. We encourage you to inquire about our product range and explore how our HPMC can enhance your pharmaceutical products.