These things you must know when you want to buy HPMC for tile adhesive. Hydroxypropyl methylcellulose (HPMC) is made by special etherification of highly pure cotton cellulose under alkaline conditions. In recent years, HPMC, as a functional admixture, mainly plays a role in water retention and thickening in the construction industry and is widely used in tile adhesive. Tile adhesive is a new modern decoration material used for pasting decorative materials such as ceramic tiles, surface tiles, and floor tiles.
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It has the advantages of high adhesion, good flexibility, and so on. Tile adhesive is made up of cement, sand, calcium formate, and additives in a particular proportion. Tile adhesive formulation contains a variety of additives. Generally, cellulose ethers that provide water retention and thickening effects are added to tile adhesive. The most used are HPMC and HEMC. In this article, I will take you through Buy HPMC for Tile Adhesive: Top 7 Things You Need to Know! HPMC is the most basic additive in tile adhesive.
1.1 According to the application field, HPMC is divided into construction-grade HPMC, daily chemical-grade HPMC, food-grade HPMC, and pharmaceutical-grade HPMC. The tile adhesive uses HPMC and belongs to the building material grade. In this video blow, we will recommend suitable grades of HPMC for each building application, such as wall putty and skim coat, tile adhesive, self leveling and so on.
1.2 According to viscosity, viscosity is an essential indicator of HPMC. HPMC increases the viscosity of tile adhesive from the viscosity of HPMC solution. The viscosity of HPMC generally refers to a particular concentration (2%) of HPMC solution, at a specified temperature (20°C) and shear rate (or rotation rate, such as 20rpm), the viscosity value measured with a specified measuring instrument. Viscosity is an important parameter to evaluate the performance of HPMC. The higher the viscosity of the HPMC solution, the better the viscosity of tile adhesive and the better the adhesion to the substrate. The stronger the anti-sagging and anti-dispersion ability. But if its viscosity is too strong, it will affect the fluidity and operability of the tile adhesive.
1.3 According to different viscosity, HPMC can be divided into three grades: low, medium, and high viscosity:
It should be noted that the results measured by different viscometers are quite different. Therefore, when testing samples, you must use a viscometer of the same brand and model as the supplier; otherwise, the measured viscosity is meaningless.
1.4 According to HPMC solubility in water, HPMC can be divided into delayed dissolution type HPMC, namely surface treatment type HPMC, and non-delay dissolution type HPMC, namely non-surface treatment type HPMC. In the construction industry, HPMC is often put into neutral water, and the HPMC product is dissolved separately to determine whether the HPMC has undergone surface treatment. After being placed in neutral water alone, the product that quickly clumps and does not disperse is a product without surface treatment; after being placed independently in neutral water, the product can disperse without clumping surface-treated.
For home decoration, we generally use ceramic tiles for unique places such as balcony walls ( wall tile adhesive ), bathrooms (shower wall adhesive), kitchens, stairs, etc., which look very beautiful and have the effect of waterproofing. Especially kitchens and bathrooms are usually prone to mold and bacteria, so it is recommended to use HPMC with high viscosity and water resistance. High-viscosity and waterproof HPMC will make the sealant and tile adhesive have good sealing properties, prevent various problems caused by moisture, extend the life of decoration, and reduce post-maintenance.
When designing outdoor spaces, such as swimming pools, outdoor balconies, etc., exterior tile adhesives, expecially pool tile adhesive, need to have water resistance, heat resistance, cold resistance, and abrasion resistance. Because outdoor spaces are generally exposed to long-term exposure to the sun, rain, pool water, and mud, strong adhesives must be used to solve these problems. Therefore, it is necessary to choose high-viscosity HPMC to make the ceramic tile adhesive meet these needs.
What is HPMC made from? Cellulose ether was first reported in , made by Suida reacting alkali-swollen cellulose with dimethyl sulfate, but the cellulose ether could not be separated at that time. In , a patent for the preparation of cellulose ethers appeared for the first time. In , HPMC was successfully synthesized and separated. In , the American DOW Chemical Company realized the industrial production of MC. Large-scale industrial production of HPMC was carried out in the United States in , and the production process reached maturity in ~.
Developed countries such as Europe, America, and Japan are more adopting the gas-phase process. Wood pulp is used as raw material (cotton pulp is used when producing high-viscosity products), alkalization and etherification are carried out in the same reaction equipment, the primary reaction is a horizontal reactor, and there is a central horizontal stirring shaft and a side-rotating flying knife specially designed to produce cellulose ether, which can obtain an excellent mixing effect. The reaction process adopts advanced automatic control means, which can accurately control the temperature and pressure.
After the reaction is completed, the excess methyl chloride and the by-produced dimethyl ether enter the recovery system in gaseous form and are recycled and reused separately. The refining and purification treatment is carried out in a continuous rotary filter press. The crushing is carried out in a high-efficiency finished product crusher while drying to remove excess water. Auxiliary processes such as mixing and packaging are also completed under the automatic control system.
At present, the production of HPMC from Chinese manufacturers is mainly based on the liquid-phase process. Generally, refined cotton is used as the raw material, and the combined pulverizer is used to pulverize, or the refined cotton is directly alkalized, and the etherification uses a binary mixed organic solvent. The reaction is carried out in a vertical reactor. The finished product is processed in batches, and the granulation is carried out at elevatemperaturesture (some manufacturers do not carry out granulation, and drying and crushing are carried out in conventional ways. Most special treatments are only to delay the hydration time (fast dissolution) of the product without anti-mildew, and compounding treatments and the packaging is manual.
MIKEM has introduced an internationally leading flexible production line of large-scale HPMC reaction and purification equipment in its cooperative factory in China and imported equipment imported from Germany. The reactor is a 25m2 horizontal equipment. The alkalization and etherification reactions are carried out in the same equipment, and the DCS central control system is adopted. Through digestion and absorption of advanced international technology, the current HPMC product models and specifications are complete, and the production capacity has also been greatly improved.
The distributed control system (DCS) is used to realize automatic control. Materials including liquid and solid materials can be accurately metered and added by the DCS system. The temperature and pressure control in the reaction process also all realize DCS automatic control and remote monitoring. The feasibility, reliability, stability, and safety of product production have been significantly improved than traditional production methods. It not only saves manpower, reduces labor intensity but also improves the on-site operating environment.
When you buy HPMC products, price will be the most practical concern. According to the survey, the price of HPMC for ceramic tile adhesive produced by Chinese manufacturers generally fluctuates around USD, and that in European and American countries typically exceeds USD.
The price of HPMC has a lot to do with its viscosity. From the current point of view, the viscosity is divided into two extremes: high viscosity, that is, the viscosity is above 20,000, and the extra-low viscosity, that is, the viscosity is below 100, and the price is relatively high. The price of medium viscosity is lower. The higher the purity, the higher the price. The price of 98%-99% high purity products is higher, and the price of products with purity below 96% is slightly lower. In general, the price difference of HPMC is closely related to the quality of the product. The price of high-quality products is correspondingly higher, while the price of low-end products is relatively lower.
The price changes are also closely related to the price changes of raw materials on the market. In early , the increase in crude oil prices led to a collective price increase in the chemical industry. The price of HPMC’s raw materials has also been affected. In terms of refined cotton, international cotton prices have gradually increased. In the short term, cotton prices are expected to rise further, but they do not have the conditions for a substantial increase. The weather conditions in the later period need to be closely monitored.
On the other hand, the prices of the produced reaction media ethanol, isopropanol, toluene, and propylene oxide have also increased relatively, leading to continued increases in the price of HPMC in the first quarter of .
Price changes are inseparable from market demand. In , due to the epidemic raging worldwide, many factories shut down, resulting in a decline in global demand, while production capacity is relatively stable, and there is an oversupplied market, so HPMC prices will also drop. At the beginning of , due to the reduction of annual production capacity during the epidemic, when the epidemic was brought under control and demand resumed, HPMC prices rose again.
Price changes are affected by force majeure. Due to the global spread of the epidemic in , factories all over the world have been closed collectively. Although the epidemic in some countries has been brought under control by mid-, the decline in global productivity has not yet fully recovered. In addition, in early , affected by the polar cold current, parts of southern Texas in the United States began to experience extreme weather such as snowfall, icing, and freezing rain, resulting in road icing and road closures.
There are many petroleum and chemical facilities both inside and outside the state. The power outage has “paralyzed” the production of many oil refineries and chemical plants in the state. The recovery of production capacity was once again interrupted, and the market appeared in short supply, which caused the price of HPMC to rise sharply again.
why we recommend you to buy HPMC of Melacoll brand ? MIKEM is a professional manufacturer of cellulose ethers. We have established solid cooperative relations with many cellulose ether manufacturers and established our production base in China.
With China’s abundant and cheap raw material supply, our cellulose ether production capacity can reach 50,000 tons per year. Therefore, we have significant advantages in cost control and collection.
Although MIKEM’s cellulose ether MelaColl production base is located in China, the production process of Melacoll cellulose products is controlled by American ISO quality standards and technology to ensure the best quality and sustainability. Each product undergoes quality inspection before being delivered to the customer. We provide customers with high-performance, reliable quality products. Therefore, we also have a significant advantage in product quality.
The raw materials produced by HPMC can be refined cotton or wood pulp, which is part of the methyl group and part of the polyhydroxy propyl ether of cellulose. The cellulose is alkalized and then etherified with propylene oxide and methyl chloride—reaction system.
The production of HEMC is slightly different from HPMC. After cellulose is alkalized, it is made by replacing propylene oxide with ethylene oxide and substituting the hydroxyl group on the glucose ring group.
The methoxy group on the HPMC methyl chloride replaces the hydroxyl group on the glucose ring group. The hydroxypropyl group replaces the hydroxyl group, and chain polymerization occurs. HPMC has thermal gel properties, and its solution has no ionic charge, does not interact with metal salts or ionic compounds, has strong mold resistance, and has good dispersion, emulsification, thickening, adhesion, water retention, and glue retention properties.
Compared with HPMC, the chemical structure of HEMC has more hydrophilic groups, so it is more stable at high temperatures and has good thermal stability. Compared with the common HPMC cellulose ether, it has a relatively high gel temperature, which is more advantageous in high-temperature use environments. Like HPMC, HEMC also has good mildew resistance, dispersion, emulsification, thickening, bonding, water, and glue retention properties.
The specific indicators of the product, such as appearance, fineness, loss on drying, sulfate ash, solution PH value, and light transmittance, viscosity, etc. are related to the product model and function, and the level of different manufacturers is different, so we will not discuss it here.
Under normal circumstances, the methoxy content of HPMC is 16%~30%, and the hydroxypropyl content can be 4%~32%; The methoxy content of HEMC is 22%~30%, and the hydroxy ethoxy content is 2%~14%.
Celulose etherHPMCMHECMethoxy content16%-30%22%~30%Hydroxypropyl content4%~32%/Hydroxy ethoxy content/2%~14%How to identify and calculate the content of different groups:
Due to the different substituents of HPMC and HEMC, the cellulose ether sample can be heated and reacted in a closed reactor. Under the catalysis of adipic acid, the substituted alkoxy group is quantitatively cracked by hydroiodic acid to generate the corresponding iodoalkane. The reaction product is extracted with o-xylene, and the extract is injected into a gas chromatograph to separate the components. Through the separation time, hydroxypropyl and hydroxy ethoxy can be identified. Use the standard internal method to quantify and calculate the content of the component to be tested in the sample.
It is not difficult to find that the separation time of the hydroxy ethoxy group is between the methoxy group and hydroxypropyl group, and the group type can be judged by comparing the separation time of the standard solution. The group type is judged by the peak time, and the peak-to-peak area calculates the group content.
Gel temperature is an essential indicator of cellulose ether. The cellulose ether aqueous solution has thermal gel properties. As the temperature rises, the viscosity continues to decrease. When the temperature of the solution reaches a certain value, the cellulose ether solution is no longer uniform and transparent but forms a white gum and finally loses viscosity. Gel temperature test method: Prepare a cellulose ether sample with a concentration of 0.2% cellulose ether solution, and slowly heat it in a water bath until the solution appears white turbid or even white gel and completely loses viscosity.
Currently, the temperature of the solution is the fiber Gel temperature of plain ether. The overall gel temperature of HEMC is slightly higher than that of HPMC. Generally, the gel temperature of HPMC is 60℃~75℃, and that of HEMC is 75℃~90℃.
Cellulose etherHPMCHEMCGel temperture60℃~75℃75℃~90℃The ratio of methoxy and hydroxypropyl content of HPMC negatively affects the water solubility, water retention capacity, surface activity, and gel temperature of the product. Generally, HPMC with high methoxy content and low hydroxypropyl content has good water solubility and surface activity, but low gel temperature.
Appropriately increasing the hydroxypropyl content and reducing the methoxy content can increase the gel temperature, but if the hydroxypropyl content is too high, it will lower the gel temperature and deteriorate the water solubility and surface activity. The MIKEM experiment results show that when the methoxy content is 27-35, the all-around performance of HPMC reaches a relatively balanced state. Specifically, different ranges of HPMC can be selected according to different needs.
The application HEMC and HPMC in tile adhensive can be used as a dispersant, water-retaining agent, thickener, and binder and have water-retaining properties.
The gel temperature of cellulose ether determines its thermal stability in the application. The gel temperature of HPMC is usually between 60°C and 75°C, depending on the model, group content, and different production processes of other manufacturers. Due to the characteristics of the HEMC group, it has a higher gel temperature, usually above 80°C, so its stability under high-temperature conditions is better than that of HPMC.
In practical applications, in a very hot construction environment, the water retention of HEMC with the same viscosity and content in tile adhesive has a more significant advantage than HPMC. Especially in tropical areas such as Southeast Asia, Africa, and South America, sometimes the construction is performed at high temperatures. HPMC with too low gel temperature will lose the original thickening and water retention properties of HPMC at high temperatures, which will affect construction.
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Since HEMC has more hydrophilic groups in its structure, it has better hydrophilicity. The water retention rate of HEMC in mortar is slightly higher than that of HPMC for products of the same viscosity at the exact dosage. In addition, the anti-sagging ability of HEMC is relatively better.
To buy HPMC must also understand the role of HPMC in tile bonding.
When it comes to sourcing Hydroxypropyl Methylcellulose (HPMC), choosing the right supplier can significantly impact the quality of your products, the efficiency of your operations, and ultimately, the success of your business. Whether you are in the construction, pharmaceutical, food, cosmetics, or other industries, finding a supplier that meets your specific requirements is essential. In this guide, we’ll walk you through the key factors to consider when selecting an HPMC supplier, and offer advice on how to make an informed decision.
Hydroxypropyl Methylcellulose (HPMC) is a synthetic polymer derived from cellulose. Due to its unique properties, it is widely used in a variety of industries. In construction, it is used as a thickening agent in mortars, adhesives, and paints. In the pharmaceutical sector, HPMC acts as a binder, stabilizer, or controlled-release agent in tablets. It is also employed as a stabilizer, emulsifier, and thickener in food and cosmetic products.
Given its wide range of applications, HPMC must meet stringent quality standards to perform effectively. Selecting a supplier that can consistently provide high-quality HPMC is essential for ensuring that your products meet both regulatory standards and customer expectations.
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The most important consideration when choosing an HPMC supplier is the quality of the product. HPMC must meet specific performance standards, depending on its application. For example, pharmaceutical-grade HPMC must comply with strict quality control regulations, while industrial-grade HPMC used in construction or food may have less rigid requirements.
To ensure consistent product quality, look for suppliers that have a robust quality control system in place. This might include:
· Raw Material Sourcing: The supplier should use high-quality cellulose sources, as the quality of the raw material directly affects the final product.
· Manufacturing Process: Advanced production processes, such as controlled temperatures, pressure, and chemical treatments, help maintain the integrity of HPMC.
· Testing and Certification: A reputable supplier will conduct regular testing to verify product performance. For instance, a pharmaceutical-grade supplier should adhere to pharmacopoeia standards, while food-grade suppliers should follow guidelines set by the FDA or other regulatory bodies.
Certifications are a strong indicator of a supplier’s commitment to quality and industry standards. Depending on your industry, you may require certain certifications to ensure that the HPMC meets regulatory requirements. Some of the key certifications to look for include:
· ISO Certification: ISO standards ensure that the supplier adheres to internationally recognized practices in production and quality management.
· FDA Approval (for food and pharmaceutical applications): If your business is in the food or pharmaceutical industries, FDA approval guarantees that the supplier’s products meet safety and quality standards.
· GMP (Good Manufacturing Practices): GMP certification ensures that the supplier follows stringent production protocols to guarantee the quality, safety, and efficacy of their products.
· Kosher/Halal Certification (for food and cosmetics): If your products cater to specific cultural or religious preferences, look for certifications that align with those requirements.
Certifications not only validate product quality but also demonstrate the supplier’s willingness to meet industry standards, making them a trusted partner in your supply chain.
Benefits of Hpmc in Tile Adhesive Applications
While quality is paramount, the ability of the supplier to meet your volume and delivery requirements is equally important. Depending on the nature of your business, you may have seasonal peaks in demand or require large quantities of HPMC for certain projects.
· Production Capacity: Can the supplier scale up production to meet your needs, particularly during high-demand periods?
· Lead Times: How long does it take for the supplier to deliver the product once an order is placed? A reliable supplier should have a proven track record of on-time deliveries.
· Inventory Management: Does the supplier maintain sufficient inventory levels to prevent stockouts, and do they have mechanisms in place for fast replenishment?
When evaluating a supplier’s capacity, ask for information on their production facilities, supply chain management practices, and history of fulfilling large or urgent orders.
In some cases, businesses may require customized HPMC products tailored to their specific needs. Whether you need HPMC with a particular viscosity, particle size, or solubility, look for suppliers that offer flexible, bespoke solutions.
A supplier that can customize HPMC products allows you to meet unique requirements for your formulations or applications. This could be particularly valuable for industries like pharmaceuticals, where specific characteristics are needed for the product to function effectively.
Make sure to ask potential suppliers about their customization capabilities, including the range of modifications they can make to the HPMC, and the timeline required for these adjustments.
Painting
Excellent customer service can make a significant difference in the success of your relationship with an HPMC supplier. A supplier that offers responsive, knowledgeable support can help resolve issues quickly and ensure that you receive the best possible service.
When evaluating customer service, consider the following:
· Availability and Response Times: How quickly does the supplier respond to inquiries? Do they have dedicated customer support teams?
· Technical Support: Can they assist with technical queries or offer guidance on optimal HPMC usage in your formulations or processes?
· After-Sales Support: Does the supplier provide assistance after the sale to ensure that the product is meeting your needs and expectations?
A supplier that values customer satisfaction and provides ongoing support can help ensure that your business runs smoothly, minimizing any potential disruptions.
Finally, while price shouldn’t be the only consideration, it is an important factor. The goal is to strike a balance between cost and quality. Opting for the cheapest supplier may result in lower quality, which could ultimately harm your product and business. Conversely, paying a premium for higher quality, reliable delivery, and better customer service can be a worthwhile investment.
When evaluating pricing, also consider the total cost of ownership, which includes:
· Shipping and Handling Fees: These can add up, particularly if the supplier is located far from your operations.
· Bulk Discounts: If your business requires large volumes of HPMC, ask about bulk discounts or pricing tiers.
· Long-Term Value: A dependable supplier that consistently meets your quality and delivery expectations can reduce overall costs by minimizing issues and delays in production.
Choosing the right HPMC supplier is essential for ensuring the quality, reliability, and success of your business. By considering factors like product quality, certifications, capacity, customization options, customer service, and pricing, you can find a supplier that aligns with your specific needs.
At MATECEL, we are proud to be a leading HPMC supplier known for our consistent product quality, customizable solutions, and exceptional customer service. With years of experience in the industry, we are committed to providing businesses like yours with high-quality HPMC products that meet your exact specifications.
Get in touch with us today to learn how we can support your business’s needs and help you achieve success with our top-grade HPMC products.
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