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  HPMC Cellulose  is a non-ionic hydroxypropyl methyl cellulose. It is commonly used as a water retaining agent in cement/mortar applications and is the most commonly used water retaining material. The production process of  HPMC  cellulose is the alkalization and etherification of cotton fibers to form a polysaccharide ether product. It is not charged by itself and the gel-like material in the charged ions does not participate in any reaction and has stable properties. hpmc cellulose is less expensive than other types of cellulose ethers and is widely used in dry mortar. The role of hydroxypropyl methyl cellulose 1. Thickening effect: HPMC cellulose can make the fresh mortar thicken and have a certain wet viscosity to prevent segregation. 2. Water retention effect: Water retention is also one of the most important properties, which helps to keep the free water in the mortar. It gives more time for the cementing material to hydrate after mortar construction. 3.Outgassing effect: HPMC c

What is nanofiltration? The burst of filtration and filtration-related activity that followed the development of the phase-inversion process for the manufacture of polymeric membranes, in the early 1960s, led to the establishment of three membrane separation processes: reverse osmosis, ultrafiltration and, more recently, microfiltration. These processes took the separation spectrum from the traditional cut point limit of standard filtration of around 0.01 mm (10 μm) to the very finest distinct solids, a few nanometres in size, and enabled the separation of large molecules from solution. The actual size ranges vary somewhat from source to source, but there is general agreement that microfiltration covers the range 10 μm down to 0.1 μm, while ultrafiltration covered 0.1 μm down to 0.005 μm (5 nm) in terms of discrete particles or Molecular Weight Cut-Off (MWCO) figures of 300,000 down to around 300 Daltons for dissolved materials. Reverse osmosis, of course, was designed to retain the ve

  There are many times when Chengdu waterstop is used in life and construction projects. We can understand its basic function - waterstop through the name. Due to the use environment of the waterstop, the substances are different. There may be water leakage during use. What is the reason? We together look. The selection of the  Minka waterstop   should be determined comprehensively according to the importance level of the structure, the deformation amount of the deformation joint and the water pressure, the application (application) of the waterstop, the working environment, economic factors and other conditions. What are the reasons for the water stop leaking? 1. Improper material is easy to damage The material of the existing back-mounted waterstop is soft and hard. The "claw edge" of the back-mounted waterstop processed with the former is thin and soft, and the "claw edge" is easily overwhelmed by the coarse aggregate when the lining concrete is poured, causing i

  High-speed rotary union is a type of rotary joint. High-speed rotary joints are used for high-speed interface transmission media. High-speed rotary joints are different from ordinary rotary joints, so you must pay special attention to them during normal use. Now let's take a look at the daily maintenance of high-speed rotary joints. High Speed Rotary Union   Maintenance Methods 1. Sealing surface Check the wear condition and thickness change of the sealing surface (generally, the normal wear is 5-10mm); observe the friction track of the sealing surface to see if there are three-point discontinuity or scratches. If these problems occur, don't hesitate to replace the rotary joint immediately. 2. Clean regularly Special attention should be paid to the inside of  the rotary joint  drum and pipeline, and a filter should be added when necessary. This is because many foreign objects will cause strong wear on the rotary joint, and frequent cleaning can effectively extend the service

  I wonder if you have considered whether your drone has the best efficiency and power. What makes your aircraft lack cruising time and consumes too much battery power. The problem is the motor? Or ESC? Or a propeller? With the deterioration of the global environment, people are more inclined to use clean energy. Electricity is currently a relatively clean energy that can be used on a large scale. Like electric vehicles, pure electric drones have become a trend. The power system of an electric drone can be divided into four parts: motor, ESC, battery, and propeller. They form the heart of the electric drone and continuously deliver kinetic energy to the drone. Motor Thrust Stand In the UAV's power system, the motor, ESC, and propeller work together, and any part of it will affect the efficiency of the power system. Perhaps every researcher wants to maximize their effectiveness, but which one is the shortcoming that affects the entire system? Is the system efficiency and power effic

Teeth whitening strips  are flexible gel-based film strips for teeth whitening. They are easy to use, effective, and whiten teeth quickly. How do teeth whitening strips work? What are the characteristics of the different types of teeth whitening strips? Take a look below! How Do Teeth Whitening Strips Work? Teeth whitening strips are made of a soft plastic material covered with a thin layer of whitening gel, usually containing hydrogen peroxide or carbamide peroxide. When you place the strips on your teeth, the gel makes contact with the tooth surfaces and penetrates them to begin the whitening process.  Dead Sea Salt Teeth Whitening Strips Different Types of Teeth Whitening Strips Yellow teeth are a worry for many people. Healthy teeth are not very white. A color that matches your skin tone is the healthiest. However, some people overly pursue white teeth and use whitening products indiscriminately, which affects their health. I believe some people have used teeth whitening strips, so

Whether it's kicking, playing, or going out for a run, we all need to protect our legs and knees, so today, I will introduce you to several sports protective gear, so that you can exercise with more confidence! Sports protective gear, a tool to protect you from injury during sports. Generally, it can be divided into head protector, shoulder protector, hand protector, elbow protector, wrist protector, waist protector, leg protector, knee protector, ankle protector, combined sports protector and other sports protector. Although there are many types of sports protective gear, it is not necessary to wear all of them in every sport during sports and competitions. It is necessary to choose the necessary protective gear for different sports, and to effectively protect the easily injured parts. Can. 1   sports glove Wearing fitness gloves, with soft gloves to improve comfort and protect the palms, can improve sports performance and make fitness more efficient. Application Scenarios The usa

There are many types of glass, among which optical glass is one of them. The optical properties of quartz glass sheets have their own unique characteristics. IR. Because quartz glass has high temperature resistance, extremely small thermal expansion coefficient, good chemical stability, bubbles, stripes, uniformity, and birefringence comparable to general optical glass, it is a high-stability optical coefficient working in various harsh occasions. Essential optical material. It is widely used in lenses, prisms, etc. of optical instruments. Quartz glass sheet is a special industrial technical glass made of silica, which is a very good basic material.  Quartz glass plate   has a series of excellent physical and chemical properties, such as: 1. High temperature resistance. The softening point temperature of quartz glass is about 1730 ° C, it can be used for a long time at 1100 ° C, and the maximum use temperature in a short time can reach 1450 ° C. 2. Corrosion resistance. Except for hydr