The different classifications and uses of hydroxypropyl methylcellulose are introduced as follows. For this knowledge, we should understand that hydroxypropyl methylcellulose can be divided into instant type, hot-melt type and instant type products. When it meets cold water, it disperses quickly and disappears into the water. At this time, the liquid has no viscosity, because HPMC is only dispersed in the water and not really dissolved. In about 2 minutes, the viscosity of the liquid gradually increased, forming a transparent viscous colloid. Hot-melt products, when they come together in cold water, they can quickly disperse in hot water and disappear in hot water. When the temperature drops to a certain temperature, the viscosity slowly appears until a transparent viscous colloid is formed.
In addition, we should also understand that the hot melt type can only be used in putty powder and mortar. In liquid glue and paint, there will be clumping and cannot be used. The instant type has a wider range of applications. It can be used in putty powder and mortar, as well as in liquid glue and paint. There is no contraindication.