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time:2015/7/13 11:08:53 source: The author: Click on the:1095
decision hydroxypropyl methyl cellulose, the decisive factor of quality is not white, of course, some manufacturer to join in the process of production under the condition of the whitening agent is more impossible to judge the stand or fall of quality.However, the quality of hydroxypropyl methyl fiber white degree is really good.
hydroxypropyl methyl cellulose with an average of 80 mesh fineness and 100 mesh, 120 purpose.Fineness is thin, generally speaking, the better the quality.
3, light transmittance:
hydroxypropyl methyl cellulose in the water, in the form of transparent colloid, after watching his light transmittance.The larger the penetrability of the good that insolubles less inside.Vertical reaction kettle production well, horizontal reaction kettle to less, but that is not absolute, good product the decisive factor is not this one.
4, the density:
the greater the proportion, the heavier the better.Than major, usually because of hydroxypropyl methyl content high, hydroxypropyl content high, the water retention is better.
Introduced above is not fully used as judgment only measure of quality of hydroxypropyl methyl cellulose, just give you a reference.