What are the main application fields of Paper Grade Hydroxyethylmethylcellulose HEMC?
Paper-grade hydroxyethyl methyl cellulose (HEMC) has a wide range of uses and has its own impact in many fields.
In the field of papermaking, it has a significant effect. First, it can be used as a paper reinforcer. HEMC can improve the bonding force between fibers and make the internal structure of the paper more stable. As a result, the physical properties such as tensile strength and burst resistance of the paper are improved, resulting in more tough and durable paper. Second, it can be used as a surface sizing agent. Coated on the surface of the paper, it can form a continuous and uniform film, which can effectively improve the surface properties of the paper, such as smoothness and water resistance. This can make the ink absorb better during printing, the printing effect is clearer, and it can prevent liquid penetration and prolong the service life of the paper. Third, in the wet part of papermaking, it can be used as a retention aid and filter aid. It can promote the retention of fibers and fillers, reduce loss, improve the utilization rate of raw materials, and accelerate the dehydration of paper sheets to improve production efficiency.
In the field of construction, it also has important applications. As a cement mortar additive, it can increase the consistency and water retention of the mortar. Excellent water retention performance, which can ensure that the cement hydration reaction is sufficient, improve the strength and bonding force of the mortar, and prevent dry cracking. In the tile binder, the addition of HEMC can enhance the bonding force between the binder and the tile and the base layer, preventing the tile from hollowing out and falling off.
In addition, in the field of coatings, HEMC can be used as a thickener. Adjust the rheological properties of the paint to make the paint have a suitable application viscosity, avoid sagging, and ensure the uniformity of the coating. At the same time, it can also improve the storage stability of the paint and prevent pigment precipitation. In the field of daily chemicals, in toothpaste, shampoo and other products, it can play a thickening and stabilizing role, improve product texture and use experience.
What are the performance characteristics of Paper Grade Hydroxyethylmethylcellulose HEMC?
Paper-grade hydroxyethyl methyl cellulose (HEMC) has a number of unique properties. Its first good water retention, in the process of papermaking, can make the water distribution between the fibers uniform and slow the loss of water. If the pulp runs in the mesh, HEMC can maintain water between the fibers, so that the fibers have enough time to interweave, and the uniformity and strength of the paper can be improved, just like building a stable structure for fiber interweaving.
In addition, HEMC has good dispersion. In the pulp system, it can make fibers, fillers, etc. spread evenly without agglomeration. For example, the application of pigment fillers, HEMC helps to uniformly distribute the paper surface, so that the paper has a uniform color and good printability, which seems to be able to fine-tune the position of all things, so that the whole is harmonious and orderly.
Its rheology is also excellent. The viscosity and fluidity of the fluid can be adjusted according to the needs of the papermaking process. During coating operations, moderate viscosity can make the paint spread evenly, without falling or being too thick, and the coating quality can be maintained. It seems that it can change its own characteristics flexibly according to the needs of the situation.
And HEMC has thickening effect. In the pulp suspension, it can increase its viscosity. The fiber suspension is better, the precipitation is slowed down, and the paper structure is uniform. Just like in the turbulent liquid, it gives the fiber a stable force and makes the paper quality high.
Paper Grade Hydroxyethylmethylcellulose What are the advantages of HEMC compared to other congeneric products
Paper Grade Hydroxyethylmethylcellulose (HEMC) is a unique additive in the field of papermaking. Compared with congeneric products, its advantages are significant.
First of all, it has good rheological properties. HEMC can delicately control the fluid characteristics in the papermaking slurry system, just like a highly skilled dancer, light dancing makes the slurry flow smoothly and orderly. In this way, the slurry can be evenly spread in the papermaking net, and the uniformity of the paper is greatly improved. Like a carefully woven brocade, the texture is delicate and uniform, laying a solid foundation for the quality of the paper.
Furthermore, the film formation is outstanding. HEMC is like a fine protective net, which cleverly forms a film on the surface of the paper. This film is tough and resilient, giving the paper excellent strength, making it like a solid armor, with greatly enhanced folding and tear resistance, and can resist more external forces.
Dispersion is also a highlight of HEMC. It is like a powerful conductor, cleverly dispersing fibers, fillers and other papermaking components to avoid agglomeration. Under its guidance, each component is in its place and works together to further optimize the paper structure and make the paper performance more perfect.
Water retention is also an advantage that HEMC cannot ignore. During the drying process of paper, it acts as a loyal guardian, firmly locking in moisture and making the drying process gentle and orderly. In this way, the problem of paper shrinkage and deformation can be effectively alleviated, and the dimensional stability is greatly improved, which provides convenience for subsequent processing and use.
To sum up, Paper Grade Hydroxyethylmethylcellulose stands out among congeneric products by virtue of its many advantages such as rheology, film formation, dispersion and water retention, and has become a powerful assistant in the paper industry to improve paper quality.
Paper Grade Hydroxyethylmethylcellulose How to use HEMC and what are the precautions
Paper Grade Hydroxyethylmethylcellulose (HEMC) is a commonly used additive in the paper industry. Its usage and precautions are as follows:
Usage
1. ** Formulated into a solution **: To use HEMC, first prepare a uniform solution with an appropriate amount of water in a certain proportion. Generally speaking, under stirring, sprinkle HEMC slowly into the water to prevent it from agglomerating and promote its full dispersion and dissolution. For example, in a larger papermaking operation, inject quantitative water into the dissolving tank, turn on the stirring device, continuously stir at a suitable speed, slowly put HEMC, and stir for a certain period of time to form a uniform, non-agglomerating solution, which can be used in the subsequent papermaking process.
2. ** Adding timing **: This solution is added at different stages of papermaking, and the effect is different. Adding in the beating stage can improve the fiber dispersion, so that the fibers are more evenly distributed in the pulp, and then improve the paper uniformity. For example, when preparing high-grade writing paper, adding an appropriate amount of HEMC solution during the beating process significantly improves the flatness and smoothness of the paper surface. Adding it during the sizing stage can enhance the sizing effect and make the paper more water resistant. For example, packaging paper, adding HEMC during sizing can effectively resist external moisture erosion.
Precautions
1. ** Storage conditions **: HEMC must be stored in a dry, cool and ventilated place, away from fire and heat sources. Because of its hygroscopicity, if the storage environment is humid, it is prone to moisture and agglomeration, resulting in a decrease in its performance. If stored in a warehouse, it should be placed on the shelf without direct contact with the ground, and the humidity in the warehouse should be controlled within an appropriate range.
2. ** Dosage control **: The dosage is precisely adjusted according to the type of paper, production process and expected performance. If the dosage is too small, the desired effect cannot be achieved; if the dosage is too large, it will not only increase the cost, but also cause abnormal physical properties of the paper. For example, in the production of tissue paper, excessive dosage will cause excessive increase in paper flexibility and insufficient stiffness, which will affect the use.
3. ** Compatibility considerations **: Pay attention to compatibility with other papermaking additives Mixing different additives may cause chemical reactions that affect each other's efficacy. If used with some cationic additives at the same time, flocculation may occur and the stability of the pulp may be damaged. Therefore, it is necessary to test before use to determine that the compatibility between additives is good before mixing.
What is the price range of Paper Grade Hydroxyethylmethylcellulose HEMC?
The price range of Paper Grade Hydroxyethylmethylcellulose HEMC is difficult to determine exactly. Due to the changeable market conditions, its price is affected by many factors.
On the one hand, the price fluctuation of raw materials such as wood pulp has a great impact on the cost of HEMC. If the price of wood pulp increases, the cost of producing HEMC will also increase, and the price will rise. Furthermore, the production process and technical level are also related to product quality and cost. Advanced technology can reduce costs and improve quality, but the initial investment is also high. If manufacturers have efficient technology, they may be competitive in price.
The state of market supply and demand is also key. If the market demand for Paper Grade HEMC is strong and the supply is limited, the price will tend to rise; conversely, if the supply exceeds the demand, the price may be downward. In addition, the price varies from region to region. The transportation costs and the degree of market competition in different regions are different, resulting in price differences.
Basically speaking, under common market conditions, the price per ton may range from several thousand yuan to more than 10,000 yuan. However, this is only a rough estimate. The actual price must be determined according to the current market conditions, the specific specifications and quality of the product, and the negotiation between the supply and demand parties. To obtain an accurate price, it is advisable to consult the relevant suppliers in detail to understand the real-time market conditions.