How can ability see the quality of HPMC (Hydroxypropyl Methyl Cellulose) at a glance? Hydroxypropyl methyl cellulose in this kind of things in our modern life, a very simple, for example, when we bought the new house is decorated is sure to use putty powder, and putty powder is made of hydroxypropyl methyl cellulose, this kind of thing in today's society is widely applied to the construction industry, so a lot of people are beginning to know this stuff. So how can ability see the quality of hydroxypropyl methyl cellulose at a glance?
1. Whiteness: although whiteness cannot determine whether HPMC is easy to use, and if it is added in the production process whitener, will affect its quality. However, most good goods are good whiteness.
2. Fineness: the fineness of HPMC usually has 80 and 100 mesh, 120 mesh is less, the finer the fineness, generally speaking, the better.
3 Transmittance: put hydroxypropyl methyl cellulose (HPMC) into water, after the formation of the clear colloid, see its transmittance, the greater the better, clarify the insoluble matter less inside. Vertical reactor penetration is good, the horizontal reactor is worse, but can not clarify the quality of the production of the kettle is better than the production of the recumbent kettle, there are many factors of commodity quality resolution.
4. Specific gravity: the greater the specific gravity, the heavier the better.More serious, usually because the content of hydroxypropyl inside is high, hydroxypropyl content is high, it is better to retain water.
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