Hydroxypropyl methylcellulose, the raw material cellulose, can be refined cotton or wood pulp. It is necessary to crush it before or during the alkalization process. The crushing is to destroy the cellulose raw material through mechanical energy. In order to reduce the crystallinity and degree of polymerization, increase its surface area, so as to improve the accessibility and chemical reaction ability of the reagents to the three hydroxyl groups on the cellulose macromolecule glucose ring base. As a Hydroxypropyl Methylcellulose Manufacturer, let me share with you.
High Viscosity Powder HPMC
Surface-treated hydroxypropyl methylcellulose particles, in neutral water, individual particles can be dispersed without agglomeration, but will not immediately product viscosity. After a certain period of soaking, the water can dissolve the HPMC particles after the chemical structure of the surface treatment is destroyed. At this time, the product particles have been fully dispersed and absorbed enough water, so the product will not agglomerate or agglomerate after dissolution.
The dispersion speed and dissolution speed depend on the degree of surface treatment. The surface treatment is slight, the dispersion speed is relatively slow, and the sticking speed is relatively fast; while the product with a deeper surface treatment, the dispersion speed is fast, and the sticking speed is slow. If you want to make this series of products quickly dissolve in this state, you can drop a small amount of alkaline substance when it is dissolved alone. The current market is usually called slow-dissolving products.
The synthesis principle of hydroxypropyl methyl cellulose is not complicated, but alkali, raw materials are crushed, and alkalized. The various environments of etherification, solvent recovery, centrifugal separation, washing and drying involve a large number of key technologies and rich knowledge. For different types of products, each environment has the latest control conditions, such as temperature, time, pressure and material flow control. Auxiliary equipment and control instruments are the guarantee of stable product quality and reliable production system.
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