Hydroxypropyl methylcellulose is a widely used raw material. Especially in the use of putty powder. There are many product properties such as: salt resistance, surface activity, thermal gelation, PH stability, water retention, adhesion, etc. However, hydroxypropyl methylcellulose is also prone to some problems. There are three reasons for the problems:
1. The use of hydroxypropyl methylcellulose
2, is the amount of base material
3. It is a reasonable combination of fillers in the formula
For example, the viscosity model of hydroxypropyl methylcellulose is used improperly, the amount of base material is too much, the filler fineness is too fine, etc. until the control measures are taken for specific reasons, such as the correct use of hydroxypropyl methylcellulose with a viscosity model of 100,000 Product, the dosage should not be less than 3.5 kg/ton, and the dosage of powdered polyvinyl alcohol should not be too large, not higher than 6%. The filler fineness generally uses 325 mesh conventional filler, and when it exceeds 600 mesh, the construction performance will be adversely affected. Note that the above situation should solve the problem of poor batch scraping.
Post time: Oct-20-2022