The level of construction glue is a problem for customers. First, the level of construction glue should take into account the raw materials. The key cause of the building glue layer is the incompatibility between the acrylic emulsion and the hydroxypropyl methyl cellulose (HPMC). Second, due to insufficient mixing time; there is poor thickening properties.
In building glue, it is important to apply instant coffee hydroxypropyl methylcellulose (HPMC). Because HPMC is only disperse in water, it is not truly dissolve. After about 2 minutes, the viscosity of the liquid slowly increases, producing a fully transparent sticky colloidal solution. Hot melt goods, encounter cold water, can be quickly disperse in boiling water, fade in boiling water. When the temperature drops to a certain temperature. The viscosity appears slowly until a fully transparent viscous colloidal solution is produce. Hydroxypropyl methyl cellulose (HPMC) in construction glue is highly recommended for 2-4KG.
Nowadays, in the decoration industry, the application of hydroxypropyl methyl cellulose is more stringent
The CMC was immediately mix with water to make clay adhesives reserve. When installing CMC paste, add a certain amount of cold water to the mixing tank. When the stirring machinery is starte, the carboxymethylcellulose is slow and evenly sprinkled into the mixing tank, continuous mixing, so that the carboxymethyl cellulose and water are completely fusion. The carboxymethyl cellulose is completely dissolve.
When dissolving the management committee. It is often necessary to disperse and mix continuously, in order to better “prevent the problem of forming and reducing the dissolution of the management committee”, and improve the dissolution rate of the management committee. The mixing time was not the same as that when the CMC was completely dissolved.