Simple Determination of Quality of Hydroxypropyl MethylCellulose
Hydroxypropyl methylcellulose has fairly widespread uses. For example, in the construction industry it can be used as binders; in the coating work it can act as thickeners, dispersing agents and stabilizers; in plastics it can function as lubricants and softeners. It can be used on many occasions and the functions are different. How to recognize it when purchasing Hydroxypropyl Methyl Cellulose in the market.
Although whiteness cannot determine whether it works well and adding whitening agents in the production process may affect its quality, good products mostly have good whiteness.
The fineness of Hydroxypropyl Methylcellulose is generally divided into 80 mesh and 100 mesh, and there is less 120 mesh. Generally speaking, the finer the product is , the better the quality will be.
Put Hydroxypropyl Methyl Cellulose into water and then watch the transmittance after forming a transparent colloid. The greater the transmittance is, the better the quality will be, indicating that there are less insoluble materials inside.
4. Specific Gravity
The greater the specific gravity is and the heavier the product is, the better the quality will be. The great specific gravity is generally due to the high content of hydroxypropyl inside, and the higher the content of hydroxypropyl is, the better the water-holding performance will be.