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Applications in Pharmaceuticals

Comparison between HPMC and HEC Key Differences and Applications

Applications and Benefits

The benefits of using HPMC are numerous. Its non-toxic and biodegradable nature aligns with the growing demand for environmentally friendly materials in various industries. Additionally, HPMC allows for the creation of high-quality products that meet the stringent regulatory requirements of sectors such as pharmaceuticals and food.

The dispersible polymer powder distributed on the interface is dispersed to form the form has another important function, which increases the adhesion of the contact material, and this is particularly important for those difficult to adhere, such as very low water absorption or non-absorbent surfaces, smooth surface of concrete and cement materials like steel plates, homogenous bricks, and vitrified tile surfaces; organic material such as wood and plastic. Because the bonding of the inorganic adhesive to the material is achieved by the theory of mechanical embedding, that is the hydraulic slurry penetrates into the gaps of other materials, gradually solidifies, and finally the mortar is attached to the surface material like key embedded in the lock. For the above hard-to-adhesive surface, since it can not effectively penetrate into the inside of the material to form a good mechanical embedding, the mortar with only the inorganic adhesive is not effectively bonded, and the observation by election microscopy is also a good proof of this. The bonding mechanism of the polymer is different. The polymer is bonded to the surface of other materials by intermolecular force, and does not depend on the void ratio of the surface. This is more prominent in the case of the organic base. The observation of the electron microscope also proves the superiority of its force. At the same time, the dispersible polymer powder containing ethylene has a stronger adhesion to organic substrates, especially similar materials such as polyvinyl chloride and polystyrene( of course the rough surface and the increased contact surface will increase the adhesion), This is used in polymer modified dry mortar for polystyrene board. This is a good example of bonding and overlaying.

Redispersible polymers are fine powder formulations produced by spray-drying water-based polymer emulsions. When these powders are mixed with water, they re-dissolve into their original emulsion form, allowing for the convenient handling and storage of polymers in powder form. This process not only increases their shelf life but also facilitates transportation, reducing costs associated with bulk liquid handling.

Insulation system: In the external wall insulation system, redispersible powder is also widely used. It can improve the bonding strength and compressive strength of insulation materials, thereby ensuring the stability and durability of the insulation system.

In the pharmaceutical industry, HPMC is a key ingredient in the formulation of various drugs. It is commonly used as a binder in tablets, helping to hold the active ingredients together while providing structural integrity. HPMC also serves as a controlled-release agent, allowing for the gradual release of medication in the body, which can enhance therapeutic effectiveness and reduce the frequency of dosing. Additionally, HPMC is widely utilized in the production of capsules, providing a vegetarian alternative to traditional gelatine capsules. Its properties as a film former allow medications to be coated, which can improve stability and mask unpleasant tastes.

Conclusion

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