The need to add cellulose to mortar and gypsum-based products.

original title: The need to add cellulose to mortar and gypsum-based products hydroxypropyl methyl cellulose, referred to as HPMC or MHPC. The appearance is white or white powder,
main use is PVC production as a dispersant, the main additive of suspension polymer preparation PVC. In the construction process of the construction industry, mainly used in the mechanized construction of wall, plaster whitewash, inlay, etc., especially in decorative construction, with paste tiles, marble, plastic decoration, paste strength, can also reduce the amount of cement. Used in the coating industry to do thickener, can make the layer bright and delicate, do not de-powder, improve the leveling performance and so on.and hydroxypropyl methyl cellulose in cement mortar and gypsum base material mainly acts as water retention and thickening, which can effectively improve the bonding force and anti-hanging resistance of the slurry.factors such asair temperature, temperature and air pressure rate can affect the evaporation rate of moisture in cement mortar and gypsum-based products. So in different seasons, adding hydroxypropyl methyl cellulose the same amount of product water retention effect there are some differences.in the specific construction can be increased or decreased HPMC addition volume, adjust the water retention effect of the slurry. Methyl cellulose ether is water-preserving at high temperature, which is an important index to distinguish the quality of methyl cellulose ether.excellent products of hydroxypropyl methyl cellulose can effectively solve the water retention problem at high temperatures.
in high temperature season, especially in hot and dry areas and the thin layer construction of the yang surface, the need for high-quality HPMC to improve the water retention of the slurry.high-quality HPMC, uniformity is very good, its methoxy and hydroxypropylene group along the cellulose molecular chain evenly distributed, can improve the hydroxyande and ether bonds on the oxygen atoms and water joint formation of hydrogen bondability, so that free water into combined water, so as to effectively control the high temperature weather caused by water evaporation, to achieve high water retention.water is needed for water in order to condense gelding materials such as cement and gypsum. The right amount of HPMC can maintain the moisture in the mortar for long enough to allow the condensation hardening process to continue.the amount of HPMC doping required to obtain adequate water retention capacitydepends on: 1, the absorption2 of the grass roots, the composition of the mortar 3, the layer thickness of the mortar 4, the water demand of the mortar 5, the condensation time of the gelding materialhigh-quality hydroxypropyl methyl cellulose energy Uniform lying in cement mortar and gypsum-based products, and wrap all solid particles, and form a layer of wetting film, the water in the base in a considerable period of time gradually released, and inorganic gelling material hydration reaction, so as to ensure the bonding strength and pressure strength of the material.so, in the high temperature summer construction, in order to achieve water conservation effect, in accordance with the formula sufficient to add high-quality HPMC products, otherwise, there will be too fast drying caused by the hydration, strength reduction, cracking, empty drums and shedding and other quality problems, but also increase the difficulty of workers construction. With the decrease in temperature, it is possible to gradually reduce the amount of water HPMC, and can achieve the same water conservation effect.Statement:
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