How to determine the quality of hydroxypropyl methyl cellulose (HPMC) simply and intuitively?
Answer: (1) Whiteness: whiteness can not determine whether HPMC is easy to use, and if it is added whitening agent in the production process, it will affect its quality. However, most of the good products are in good whiteness.
(2) fineness: the fineness of HPMC is generally 80 mesh and 100 mesh, and the 120 purpose is less. Most of the HPMC produced in Shandong is 80 mesh, and the finer the fineness, the better generally.
(3) light transmittance: put the hydroxypropyl methyl cellulose (HPMC) into the water and form a transparent colloid, and see its luminosity, the better the transmittance, indicating that the insoluble substance inside is less. The vertical reaction kettle is generally good, the horizontal reaction kettle is a little worse, but it can't explain that the quality of the production of the reactor is better than that in the caldron, and the quality of the product is determined by many factors.
(4) proportion: the greater the proportion, the heavier. It is more important than that because the hydroxypropyl content is high and hydroxypropyl content is high.
Shijiazhuang macrocellulose Co., Ltd. specializes in R & D, production and sales of hydroxypropyl methyl cellulose ether hydroxypropyl methyl cellulose. For many years, we have been trusted by our customers with professional technology, high quality products and good service attitude. We will do our best to provide better products and services to the market. Contribute to the development of China's building energy conservation.
Welcome to inquire and cooperate with you