Views: 0 Author: Site Editor Publish Time: 2025-12-17 Origin: Site
Our core product, HPMC (hydroxypropyl methylcellulose), from Qingquan Cellulose, can provide you with higher quality products and can be customized to different viscosities according to your needs. Shijiazhuang Qingquan Cellulose Co., Ltd. is a cellulose manufacturer from China.
In pre-mixed spray mortars, the addition amount of hydroxypropyl methylcellulose etheris very low, but it can significantly improve the performance of wet mortar and is a major additive affecting the workability of the mortar. The rational selection of different types, viscosities, particle sizes, degrees of viscosity, and addition amounts of cellulose ethers has a positive impact on improving the performance of dry-mix mortars. Currently, many masonry and plastering mortars have poor water retention, and water-cement separation occurs after only a few minutes of standing. Water retention is an important property of methylcellulose ether, and it is a property that many dry-mix mortar manufacturers in China, especially those in warmer southern regions, are concerned about. Factors affecting the water retention effect of dry-mix mortar include the amount of MC added, MC viscosity, particle fineness, and ambient temperature. Cellulose ether is a synthetic high-molecular polymer obtained from natural cellulose through chemical modification.
The important roles of water-soluble cellulose ether in mortar mainly include three aspects: excellent water retention capacity, influence on mortar consistency and thixotropy, and interaction with cement. The water retention effect of cellulose ether depends on the water absorption of the substrate, the composition of the mortar, the thickness of the mortar layer, the water demand of the mortar, and the setting time of the cementing material. The water retention of the cellulose ether itself comes from its solubility and dehydration effect.
In pre-mixed spray mortars, hydroxypropyl methylcellulose ether plays roles in water retention, thickening, delaying cement hydration kinetics, and improving construction performance. Good water retention allows for more complete cement hydration, which can improve the wet tackiness of the wet mortar, increase the bonding strength of the mortar, and adjust the setting time. The addition of hydroxypropyl methylcellulose ether to mechanically sprayed mortar can improve the spraying or pumping performance of the mortar, as well as its structural strength. Therefore, cellulose ether is widely used as an important additive in pre-mixed mortars.
