(1) Appearance: it is white or-like white powder.
(2) Granularity: 100 entry pass rate is greater than 98.5%: 80 entry pass rate is 100%.Special size size 40~60 mesh.
(3) The carbonization temperature: 280-300℃
(4) Hydroxypropyl methylcellulose. 25-0.70g/cm (usually around 0.5g / cm), over 1.26-1.31.
(5) Discolor temperature: 190-200℃
(6) Surface tension: 2% aqueous solution is 42-56dyn / cm.
(7) Dissolution performance: it can dissolve in water and some solvents, such as an appropriate proportion of ethanol / water, propane alcohol / water, etc.Its water liquid has surface activity, and high transparency, the performance is relatively stable, different specifications of product gel temperature is different, the solubility changes with the viscosity, the lower the viscosity, the greater the solubility, different specifications of HPMC its performance has certain differences, pH value has no impact on the solubility of HPMC in water.
(8) HPMC along with methoxy content decrease, gel point increase, water solubility decrease, and surface activity also decrease.
(9) HPMC also has the characteristics of thickening ability, salt resistance, low ash powder, pH stability, water retention, size stability, excellent film formation, and a wide range of enzyme resistance, dispersion and bonding properties.