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China hpmc manufacturer which could be used in contsruction chemical and daily grade chemical
2021-04-19 09:55:22
Our company specializes in the production and operation of various types of hydroxypropyl methylcellulose. Hydroxypropyl methyl cellulose, also known as hypromellose, cellulose ether HPMC, is made of highly pure cotton cellulose as raw material, treated with lye at 35-40°C for 30 minutes, pressed, and crushed the cellulose , Properly age at 35°C to make the obtained alkali fiber average degree of polymerization within the required range. Put the alkali fiber into the etherification kettle and etherify it at 50-80°C for 5h, with a maximum pressure of about 1.8MPa. Then wash the material in hot water at 90°C to increase the volume, and then dewater it with a centrifuge, and then repeatedly wash until it is neutral.