hydroxypropyl methylcellulose wholesale
Cold-water instant soluble HPMC (Surface treated) can rapidly disperse in cold water. But it will not dissolve at this step, so the liquid has no viscosity because HPMC is only dispersed in water and there is no real dissolution. About 2 minutes, by even stirring, it will dissolve and the viscosity of the liquid gradually increased to form a transparent viscous colloid. Hot-soluble type(Non-surface treated), lumped in cold water, but when it mixes with hot water, it will quickly disperse. By stirring, until the temperature drops to a certain temperature (In our company, the gel-forming temperature of the resulting product is around 65°C-75°C), the viscosity slowly appears until a transparent viscous colloid is formed.
The reason for lumping in the cold water is that the outer cellulose powder encounters cold water, immediately starts to have a viscosity, thickens into a transparent colloid, and the cellulose inside is not in contact with water, and is surrounded by the colloid, or is powdery, but slowly dissolves. Here it should be noted that many users think hot-water soluble HPMC must rely on hot water, which is one-sided. In practical applications, the non-surface treated hydroxypropyl methyl cellulose (HPMC) is mainly applied in dry-mixed mortars such as mortar and putty. And it is not necessary to use hot water to dissolve hot-melt products, because the putty powder or mortar is powder. After dry mixing, the cellulose is separated by other materials, and there will be space between cellulose. Thus when it meets water, it will immediately become viscosity and will not have lumps.