hydroxypropyl methylcellulose HPMC in Plastering MortarFebruary 2nd 2023
HPMC manufacturer- Effects of cellulose ethers with different viscosities on putty powders
Mixing cellulose ether, organobentonite, and starch ether make the special cellulose ether for putty. Cellulose ether serves the purpose of water conservation. Moreover, in the batch where putty is used for scraping purposes, the function of cellulose ether increases manifolds as it smoothens the surface. The range from 30000 to 50000 plays a very crucial role in the structure and finish of the end product.
For both dry powder putty and putty paste, the modified methylcellulose and hydroxypropyl methylcellulose ether is used. Since the role of cellulose ether in wall putty is water retention, lubrication, adhesion, etc., the viscosity range of 30000-60000cps is the most appropriate.
The viscosity ratio of cellulose ethers for putty is different depending upon the putty formulation as there are wall putty made up of light calcium, ash calcium, white cement, etc. whereas some manufacturers use gypsum powder instead of white cement. There are different effects of viscosity-
Effects of Low viscosity–low viscosity has poor water retention but is considered suitable for leveling.
Effects of middle viscosity-Medium viscosity range 75000-100000, used mainly for wall putty to provide superior water retention.
Effects of high viscosity-high viscosity of cellulose ethers for putty also enhance the putty viscosity. It helps in avoiding the occurrence of drooping in the construction and gives an easy and effort-saving wall scraping experience.