Polyvinyl Alcohol PVA PVOH

According to the "In-depth Research and Development Forecast Report on China's High-Strength and High-Model PVA Industry from 2024 to 2029" released by the China Industrial Research Institute, the global polyvinyl alcohol (PVA) film market size will reach 13.827 billion yuan in 2023, and is expected to reach 13.827 billion yuan by 2029. , this market size will grow to 14.368 billion yuan, and the composite materials forecast within the year has been 0.65%. Although this data directly targets the PVA film market, the strong point is that as an important application field of PVA, its market size growth trend should be consistent with or more significant than the overall PVA market.   In China, the market demand for high-strength and high-modulus PVA fibers is growing rapidly. According to statistics from the China Chemical Fiber Industry Association, the actual output of high-strength and high-modulus polyvinyl alcohol fiber in my country in 2020 was 44,800 tons. With the advancement of technology and the expansion of the market, production should increase in recent years. In particular, China's PVA-coated high-barrier film market will grow by 19.2% year-on-year in 2023, and is expected to grow by 7.8% year-on-year in 2024. This data shows the rapid growth of market demand in this field, and also indirectly reflects high-end products such as high-strength and high-modulus PVA fibers. The market demand is constantly expanding.   With the continued growth of the global economy and the continuous advancement of science and technology, the demand for high-performance fiber materials in high-end fields has become increasingly prominent. Especially in the fields of national defense, aerospace and other fields, the demand for high-strength and high-modulus polyethylene fibers will continue to grow. At the same time, the demand for high-strength and high-modulus PVA fibers in many industries such as building materials, textiles, papermaking, and coatings is also expanding.   In the context of increasing global environmental awareness, the high-strength high-mode PVA industry will also develop in a more environmentally friendly direction. By adopting environmentally friendly materials and optimizing production processes, pollution emissions in the production process are reduced and resource utilization efficiency is improved.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

Polyvinyl alcohol, an organic polymer. The molecular formula of polyvinyl alcohol is (C₂H₄O), the degree of polymerization is usually 500 to 5000, and the molecular weight is usually 25000 to 300000. Polyvinyl alcohol at room temperature is a colorless, white or milky white amorphous powder, odorless and tasteless, but it decomposes Can produce irritating smoke and dust.   The physical properties of polyvinyl alcohol change with the degree of polymerization and alcoholysis. Generally, the density range is 1.19-1.31g/cm³, the melting point is 212-267°C, and the boiling point under standard atmospheric pressure is about 340°C. Polyvinyl alcohol is soluble in hot water, insoluble in gasoline, benzyl alcohol ketone and other general organic solvents, soluble in hot hydroxyl organic solvents (such as glycol, glycerin, phenol, etc.), and soluble in liquid at room temperature. Ammonia and dimethyl sulfoxide.   The chemical structure of polyvinyl alcohol is stable, but alcohol-related reactions can also occur based on its molecular structure. For example, polyvinyl alcohol can undergo esterification reactions with inorganic complexes and organic compounds, and acetalization reactions with various aldehydes.   Polyvinyl alcohol is produced differently from other polymers and cannot rely on the polymerization of single unit precursor monomers. Industrially, polyvinyl acetate is usually produced by polymerizing vinyl acetate, and then polyvinyl alcohol is produced by alcoholysis under alkaline conditions.   Polyvinyl alcohol has unique properties such as strong adhesion, film flexibility and smoothness, and is widely used in fiber manufacturing(0588, 1788, 2099, 2499, 2699), papermaking(2099, 1799), textile(1788, 2488, 2299), construction(0588, 1788, 2088, 2488), film or sponge(1788, 1799, 2088, 2099) and binder(0588, 1788, 2088, 2488),etc. many other fields.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

High-strength and high-modulus polyvinyl alcohol fiber, as a high-performance fiber product with excellent mechanical properties, biocompatibility and non-toxicity, has shown strong development momentum in the Chinese market in recent years. And driven by factors such as technological innovation, growing market demand, and increasing environmental awareness, the industry will continue to maintain rapid development.   The raw materials of high-strength and high-modulus PVA mainly include basic chemical raw materials such as coal, acetic acid, and vinyl acetate. These raw materials undergo a series of chemical reactions and are converted into preliminary products of polyvinyl alcohol (PVA), providing basic materials for the production of high-strength and high-modulus PVA.   The company uses upstream raw materials and uses specific spinning processes and drawing technologies to produce PVA fibers with excellent properties such as high strength and high modulus. This process requires advanced production equipment and technical support to ensure product quality and stability.   High-strength and high-modulus PVA fibers are widely used in many downstream industries, including building reinforcement materials, composite materials, textile industry (such as bulletproof vests, high-strength ropes, etc.), medical fields (such as surgical sutures, drug sustained-release carriers, etc.) and Environmental protection fields (such as water treatment, soil improvement, etc.). The needs and changes in the downstream market directly drive the development of the high-strength and high-module PVA industry.   The application of high-strength and high-modulus PVA fiber in the field of building materials is particularly prominent. It is mainly used to replace asbestos to enhance the strength and anti-cracking properties of cement products. Simply adding 0.3% to 0.5% of high-strength and high-modulus polyvinyl alcohol fiber and a small amount of polymer to substrates such as cement and gypsum can effectively change the brittleness of the substrate and eliminate cracks.   In textile, papermaking, coating and other fields, high-strength and high-modulus PVA fiber also plays an important role. In the field of textiles, it can be used as an auxiliary agent such as spinning fluid and textile slurry; in the field of papermaking, it is often used for surface coating, adhesion and paper strength improvement; in the field of coatings, it can enhance the adhesion of coatings and durability.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

High degree of polymerization PVA has excellent strength and durability due to its high degree of polymerization, and is an important raw material for preparing high-strength materials. High degree of polymerization is generally above 5000.   1. High-strength adhesive: High-polymerized PVA can be used to prepare high-strength glues that can firmly bond various materials and are widely used in construction, automobiles, electronics and other fields. For example, in the construction field, PVA adhesives are used to bond ceramic tiles, stone, wood and other materials, showing good durability and water resistance.   2. Film materials: High-polymerization PVA can also prepare transparent film materials. These film materials have excellent tensile strength, crack resistance and air barrier properties, and are suitable for textiles, food packaging and other fields. For example, film materials made of high-polymerized PVA are widely used in the packaging of high-end textiles because they are non-static, oil-resistant, and resistant to organic chemicals.   3. Special functional materials: Due to its unique properties, ultra-high molecular PVA is often used to prepare materials with special functions. For example, in the field of biomedicine, ultra-high molecular PVA can be used as artificial blood vessels, biomedical materials, etc. Because of its good biocompatibility and mechanical properties, it can effectively replace or assist human tissue.   4. Advanced coating materials: Ultra-high molecular PVA can also be used to prepare advanced coating materials. These materials have excellent wear resistance, scratch resistance, chemical corrosion resistance and other properties, and are widely used on the surfaces of key components in automobiles, aerospace and other fields. coating.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.  

Low degree of polymerization PVA has good water solubility and plasticity due to its lower degree of polymerization and shorter molecular chain. These properties make low-polymerization PVA widely used in many fields. The degree of polymerization of PVA is generally below 1000.   1. Water-soluble adhesive: Low-polymerized PVA is often used as a water-soluble adhesive because of its excellent water solubility. For example, in the paper products industry, low-polymerized PVA is used for cardboard lamination, corrugated cardboard bonding, and office glue. It also has the advantage of being safe and non-toxic, making it widely used in the packaging industry, such as the bonding of kraft paper bags for heavy objects such as cement, fertilizers, and grain.   2. Coatings and coating materials: Low-polymer PVA can be used as a coating material on the surface of paper, which can significantly improve the gloss and anti-permeability of the paper. In addition, it can also be used as a pigment processing agent to improve the whiteness and gloss of coated paper and enhance the printing effect.   3. Commonly used low-polymerization polyvinyl alcohols such as PVA 05-88. This grade of PVA is also used for medical devices, warp sizing, release agents, etc.   Medium degree of polymerization PVA has a moderate degree of polymerization and exhibits good strength and heat resistance, so it is suitable for occasions that require a certain degree of strength and durability. The degree of polymerization of PVA is between 1000 and 5000.   1. Textile enhancer: Medium-polymerized PVA is commonly used as a textile enhancer in the textile industry. By adding it to textiles, it can significantly improve the softness and wear resistance of textiles, thereby extending their service life. For example, by blending medium-polymerized PVA with cotton, wool, viscose fiber, etc., you can produce Vinyl textiles with excellent properties.   2. Fiber products: Medium-polymerized PVA can also be used as a raw material for fiber products, such as PVA fiber (vinylon) that has been dissolved, spun and acetalized, and is widely used in clothing, tarpaulins, cords, fishing net ropes, etc.   3. Commonly used polyvinyl alcohols with medium polymerization degrees include PVA 17-88, 20-88, 24-88, 26-88 etc. These can also be used to produce glues, paper adhesives, fabric finishing agents, PVA films, etc     Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

Polyvinyl alcohol is obtained through the alcoholysis of polyvinyl acetate. Its degree of alcoholysis refers to the percentage of the number of vinyl alcohol units in the molecular chain to the total number of molecular structural units. The degree of polymerization of polyvinyl alcohol refers to the number of repeating units in the molecular chain, which directly affects the length and physical properties of the molecule. The different degrees of polymerization determine the different application fields and properties of polyvinyl alcohol. For example, polyvinyl alcohol with an ultra-high degree of polymerization is often used in applications requiring greater strength and durability, while polyvinyl alcohol with a lower degree of polymerization may be more suitable for applications requiring better solubility or flexibility.   For example: According to the chemical formula of polyvinyl alcohol (-C2H2O-)n, PVA 2488, -88 means that the degree of alcoholysis is 88mol%, and 24- means that its degree of polymerization is about 2400, so the ideal molecular formula of PVA2488 should be (-C2H2O-) 2400. The adjustment is approximately 2400*44=105600. Therefore, one is to measure the size of the formed skeleton, and the other is to measure the conversion rate into the desired product. Those two are different.     Polyvinyl alcohol (PVA) is the hydrolyzate of polyvinyl acetate. The solvent of PVA is water, but its solubility in water is largely affected by the degree of polymerization and is dominated by the degree of alcoholysis. Completely alcoholylated PVA has very little dissolution in water. When the alcoholysis degree is below 88%, it is almost completely dissolved at room temperature of 20°C. However, as the alcoholysis degree increases, the solubility decreases significantly. Solubility PVA is soluble in water. The higher the water temperature, the greater the solubility, but it is almost insoluble in organic solvents.   PVA solubility changes with the degree of alcoholysis and polymerization. .Partial alcoholysis and low polymerization degree PVA dissolve very quickly, while complete alcoholysis and high polymerization degree PVA dissolve slowly. As a general rule, the degree of alcoholysis has a greater impact on the solubility of PVA than the degree of polymerization.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.