Distinguish the authenticity of hydroxypropyl methylcellulose HPMC

1. The visual state of pure HPMC is fluffy and the bulk density is small, ranging from 0.3-0.4g/ml; the adulterated HPMC has better fluidity and heavier hand feel, which is obviously different from the original appearance.

2. The pure HPMC aqueous solution is clear, has high light transmittance, and has a water retention rate of ≥97%; the adulterated HPMC aqueous solution is turbid, and the water retention rate is difficult to reach 80%.

3. Pure HPMC should not smell ammonia, starch and alcohol; adulterated HPMC can often smell various smells, and even if it is odorless, it will feel heavier.

4. Pure HPMC powder is fibrous under a microscope or magnifying glass; adulterated HPMC can be observed as granular solids or crystals under a microscope or magnifying glass.

Characteristics of hydroxypropyl methylcellulose:

1. Excellent water retention and thickening performance to ensure complete hydration of the slurry.

2. High bonding strength and significant air-entraining effect, effectively inhibiting shrinkage and cracking.

3. Delay the heat release of cement hydration, delay the setting time, and control the operability time of cement mortar.

4. Improve the water consistency of pumped mortar, improve rheology, and prevent segregation and bleeding.

5. Special product, designed for high-temperature construction environments in summer, to ensure efficient hydration of the slurry and no delamination.