HPMC dissolution method
All models can be added to the material by dry blending. When it needs to be added directly to the aqueous solution at room temperature, it is best to use a cold water dispersion type, and it usually takes 10-90 minutes to thicken after adding. For ordinary models, stir and disperse with hot water first, […]
Applications of HPMC
HPMC is often widely used in other fields, such as plastics: as a mold release agent, softener, lubricant, etc. Polyvinyl chloride: used as a dispersant in the production of polyvinyl chloride, it is the main auxiliary agent for the preparation of PVC by suspension polymerization. Pharmaceutical industry: coating materials; film materials; rate-controlling polymer materials for […]
Production method of HPMC
Treat the refined cotton cellulose with alkali solution at 35-40°C for half an hour, press, pulverize the cellulose, and properly age at 35°C, so that the average degree of polymerization of the obtained alkali fiber is within the required range. Put the alkali fiber into the etherification kettle, add propylene oxide and methyl chloride in […]
What is hydroxypropyl methylcellulose?
Hydroxypropyl methylcellulose (Hypromellose), also known as hypromellose, is a kind of non-ionic cellulose mixed ether. It is a semisynthetic, inactive, viscoelastic polymer commonly used as a lubricant in ophthalmology, or as an excipient or vehicle in oral medicines. Soluble in water and some solvents, such as appropriate proportion of ethanol/water, propanol/water, etc. Aqueous solutions are […]
The function of high strength and high modulus pva fiber
Anti-cracking and anti-seepage: The fibers are randomly distributed in the concrete (mortar), which can effectively prevent the occurrence and development of cracks and improve the waterproof and anti-seepage ability. Anti-shock and anti-shock: effectively absorb impact energy and improve anti-shock capacity. Anti-freezing and anti-fatigue: the stress caused by the temperature difference between the links improves the […]
High strength and high modulus pva fiber
PVA fiber for concrete (or mortar) is an ideal environment-friendly cement reinforcement material, because of its unique molecular structure, it has good affinity with cement, and has good alkali resistance and weather resistance. Adding PVA fibers to cement concrete (or mortar) can effectively control the cracks caused by plastic shrinkage and temperature changes in concrete […]
The main disadvantage of polyvinyl alcohol fiber
The main disadvantage of polyvinyl alcohol fiber is poor dyeability, low dyeing amount, and not bright color. This is because the fiber has a skin-core structure and some hydroxyl groups are blocked by acetalization. In addition, the hot water resistance of polyvinyl alcohol fiber is poor, and obvious shrinkage and deformation will occur when the […]
High strength polyvinyl alcohol fiber
High-strength polyvinylalcohol fiber is a fiber obtained by jelly spinning or wet spinning and high-stretching of polyvinylalcohol with a high degree of polymerization. For example: after the jelly yarn spun with dimethyl sulfoxide/water (8/2) mixed solvent is stretched by 48 times, the fiber with the strength of 21.36cN/dtex can be obtained. High-strength and high-modulus polyvinyl […]
Modified polyvinyl alcohol fiber
Polyvinyl alcohol fiber can be blended with other fibers, and then dissolved after textile processing to obtain high-grade spun yarn textiles, and can also be made into non-twisted yarn or non-weft blanket. It can also be used in papermaking as a binder to improve the strength and toughness of paper. In addition, it can also […]
Application of Polyvinyl Formal Fiber in Industrial Field
Polyvinyl formal fibers are used in the industrial field to make canvas, tarpaulins, filter cloths, conveyor belts, packaging materials, work clothes, fishing nets and cables for offshore operations. High-strength, high-modulus filaments can be used as skeleton materials for conveyor belts, lining materials for various rubber hoses, rubber fabrics and rubber shoes, and can also be […]
