Shanghai ShiCi International Trading Co., LTD.
  • Products
    Products
    The company mainly produces and sells "HUAMAO" as well as "SANWEI" two major brand products. Products covered three series: One is polyvinyl alcohol (PVA) series of products with an annual capacity of 100,000 tons; the second is dispersible polymer powder can be 85,000 tons per year; the last is the cellulose products annual capacity of 60,000tons. 
  • Services
    Services
    Shanghai Shici is willing to provide products with high performance and high quality. Good after-sales services guaranteed for better shopping experience. Please feel free to contact us!
  • Company
    Company
    Shanghai shici International Trading Co.Ltd is a professional company which contain enterprise sales, warehousing, distribution, technical services. Shanghai Shici in view of the new market situation and customer demand, the establishment of raw material supply as the core, formulation research, technical support, such as supporting the "integration, one-stop" service marketing model. 
  • Application
    Application
    Our polyvinyl alcohol (PVA) series of products, dispersible polymer powder, hydroxy propyl methyl cellulose and other related products are well applied in many fields such as paper, adhesives and emulsion, textiles, barrier films, tec,.
  • Resources
  • Contact

Relationship between Water Retention and Temperature of Hydroxypropyl Methyl Cellulose HPMC

The water-retention function and principle of hydroxypropyl methyl cellulose HPMC:

Cellulose ether HPMC in cement mortar and gypsum base slurry, mainly to protect water and thickening effect, can effectively improve the bonding strength and sag resistance.

Air temperature, temperature and wind pressure can affect the moisture content of cement mortar and gypsum base. Therefore, in different seasons, adding HPMC the same amount of product water conservation effect there are some differences. In the concrete construction, we can adjust the water retention effect of the slurry by adding and subtracting the amount of HPMC. The water retention of methyl cellulose ether under high temperature condition is an important index to distinguish the quality of methyl cellulose ether. Excellent HPMC products can effectively solve the problem of water conservation under high temperature. High quality HPMC is needed to improve the water retention of the slurry in the high temperature season, especially in the hot and dry areas and the thin layer construction of the Xiangyang surface. High-quality hpmc with very good uniformity, its methoxy and hydroxypropyl chi groups are evenly distributed along the chain of cellulose molecules, can improve the hydroxyl and ether bond oxygen atom and water association to form hydrogen bonding capacity, so that free water into a combination of water, so as to effectively control the high temperature caused by the evaporation of water, to reach a high moisture retention.

High-quality cellulose hpmc can be evenly and effectively dispersed in cement mortar and gypsum base products, and wrap all the solid particles, and form a layer of wetting film, the water in the base is gradually released over a long period of time, and inorganic cementitious material hydration reaction, thus ensuring the bonding strength and compressive strength of the material. Therefore, in the high temperature in the summer construction, in order to achieve water conservation effect, the need to add high quality of HPMC products in accordance with the formula, otherwise, will appear dry too fast and caused by insufficient hydration, strength reduction, cracking, hollowing and shedding quality problems, but also increase the difficulty of construction workers. As the temperature decreases, the added amount of HPMC can be reduced gradually, and the same water retention effect can be achieved.

The water retention of hydroxypropyl methyl cellulose HPMC products is affected by temperature and the following factors:

1. Uniformity of cellulose ether HPMC
The homogeneous reaction of HPMC, methoxy and hydroxypropyl oxygen is evenly distributed and the water retention rate is high.

2. Cellulose ether HPMC Thermal gel temperature
The coagulation gum temperature is high, the water retention rate is high, conversely, the water retention rate is low.

3. Cellulose ether HPMC viscosity
When the viscosity of HPMC increases, the water retention rate increases, and when the viscosity reaches a certain degree, the increase of water retention rate tends to be gentle.

4. Cellulose ether HPMC added amount
The greater the amount of cellulose ether hpmc, the higher the water retention rate, the better the water retention effect. In the range of 0.25-0.6%, the water retention rate increases rapidly with the increase of adding quantity, and the increasing trend of water retention rate is slowed down when the added amount increases.
Related News
  • 2017 Development of Polyvinyl Alcohol Industry Market

    2017 Development of Polyvinyl Alcohol Industry Market

    August 18, 2017According to the "China polyvinyl alcohol market operation situation and Investment forecast report (2017 edition)" published by the wood Information consultation, polyvinyl alcohol (PVA) is a water-s...view
  • Attentions of Putty Powder in Summer Construction

    Attentions of Putty Powder in Summer Construction

    August 18, 2017Into the June, the weather gradually hot, the sun also began to vicious up, walking on the road to the suburbs, roadside large golden fields of wheat, bursts of dry wind blowing over, wheat undulating...view
  • The Belt and Road Links Multinational Trade Prospects

    The Belt and Road Links Multinational Trade Prospects

    August 18, 2017On June 1, at the eighth session of the International Forum on Infrastructure Investment and construction, the China Foreign contracted Contractors ' Association officially released the National Infra...view
  • PVA Price Wil Increase Soon!

    PVA Price Wil Increase Soon!

    September 15, 2017Hurricane Harvey landed in the United States, the strongest hurricane to hit Texas State in more than 50 years, the biggest threat from strong winds to floods, causing Texas State coastal ports to clo...view
  • Tips for Construction of Putty

    Tips for Construction of Putty

    August 18, 20171. Why can't a putty be scraped before the putty is dry?A: In general, the wall of the family decoration Putty are done two times, the first time is to the entire wall leveling, the second is to have ...view
  • The Function and Mechanism of Polyvinyl Alcohol Powder in Putty

    The Function and Mechanism of Polyvinyl Alcohol Powder in Putty

    August 18, 2017After the PVA powder is mixed with other powders, the paste slurry is formed by adding water. After evaporation, the structure of inorganic and organic binder is formed, the brittle rigid skeleton of ...view
  • TEL:+86 021-34781766
  • EMAIL:Trade@huamaomall.com
  • ADDRESS:ROOM208, Building39, No.2049, Pujing Road, Minhang District, Shanghai, China