PVA 1788 PVA 088-20 BP-17

PVA optical films have a wide range of applications, including optical lenses, display devices, filters and optical sensors. By using PVA optical film, the performance of optical devices can be improved and better optical effects can be achieved.   PVA optical film has high transparency and excellent optical properties. It can be used as a coating on the surface of optical lenses to improve the optical properties of the lenses. At the same time, PVA optical film also has the characteristics of wear resistance and anti-pollution, which can protect the lens surface and reduce damage.   With the development of electronic products, the demand for display devices is also getting higher and higher. PVA optical film has excellent polarizing effect and high contrast, which is especially suitable for polarizers of LCD displays. It can also be used as anti-reflective coating for touch screens, effectively reducing reflected light and improving the viewing experience.   PVA optical film has good tunability and can be used to make various optical filters. An optical filter is an optical component that selectively transmits or reflects light of specific wavelengths. Such as infrared filters, UV filters, etc. These filters have a wide range of applications in optical imaging, spectral analysis and other fields.   PVA optical films have excellent optical properties and stability and can be used to make high-sensitivity, high-resolution optical sensors. An optical sensor is a device that can convert optical signals into electrical signals and is widely used in optical measurement, optical communications and other fields.   With the continuous development of science and technology, the application prospects of PVA optical films in the optical field will be broader.   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.

With the rapid development of modern electronic technology, thermal conductive materials are increasingly used in electronic devices. As a new type of thermal conductive material, thermally conductive PVA (polyvinyl alcohol) film has received widespread attention due to its excellent thermal conductivity, good mechanical strength and processing performance. Thermally conductive PVA film has a wide range of application prospects in the field of electronic equipment due to its excellent performance.   1. LED lighting: LED lamps generate a lot of heat during operation, and thermally conductive materials are required for effective heat dissipation. Thermally conductive PVA film can be used as a heat dissipation substrate or insulating gasket for LED lamps to improve heat dissipation efficiency and service life.   2. Electronic components: Electronic components will generate heat accumulation when working, affecting performance and life. Using thermal conductive PVA film as an isolation material or heat dissipation pad between components can effectively reduce the operating temperature and improve reliability.   3. New energy vehicles: The battery packs in new energy vehicles will generate a lot of heat when working and need to be dissipated in time to ensure safe and stable operation. Adding thermal conductive PVA film between battery packs can achieve effective heat dissipation and extend battery life.   4. Communication equipment: The power amplifiers, filters and other components in communication equipment will generate a lot of heat when working and need to be dissipated to avoid equipment damage or performance degradation. Using thermal conductive PVA film to wrap or fill around these components can achieve good heat dissipation and ensure normal and stable operation of the equipment.    

As a new type of thermal conductive material, thermal conductive PVA (polyvinyl alcohol) film has excellent thermal conductivity, good mechanical strength and processing performance. The preparation of thermal conductive PVA film mainly includes raw material selection, blending modification, film forming process and post-processing.   Raw material selection: The main raw material of thermal conductive PVA film is polyvinyl alcohol resin, and a certain amount of thermal conductive filler, such as oxygen, needs to be added Aluminum, boron nitride, etc. The addition of these fillers can effectively improve the thermal conductivity of PVA films.   Blending modification: the polyvinyl alcohol resin is mixed with the thermal conductive filler in a certain proportion, and the blending modification is carried out by high-speed stirring, ball milling and other methods. During the blending process, the filler particles are uniformly dispersed in the resin matrix to form a thermal conductivity network, thereby improving the thermal conductivity of the material.   Film forming process: the blended modified slurry is made into a film by casting, calendering or extrusion processes. In the film forming process, parameters such as temperature, pressure and speed need to be controlled to ensure the thickness, uniformity and surface quality of the film.   Post-treatment: Post-treatment processes such as drying and heat setting need to be carried out after film formation to eliminate the internal stress inside the film and improve dimensional stability.   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 (PVA) is a water-soluble polymer material widely used in the preparation of hemostatic fibers, artificial skin, plasma substitutes, etc. It can also be used as a drug sustained-release carrier material to prepare targeted microspheres. Animal experiments have shown that it is completely harmless and has good biocompatibility. It can be slowly degraded in the body, so it is widely used as a drug carrier. Polyvinyl alcohol microspheres with a particle size of less than 10 microns release drugs into the human body to achieve the purpose of treatment and immunity. For example, PVA microspheres made of erythropoietin, interferon, and cholera toxin B subunit can be absorbed orally. Through dispersion polymerization, polyvinyl alcohol microspheres with a size of 1-10μm can be prepared, and they can also be further chemically converted into various types of functionalized microspheres according to the different requirements of the application field.   Polyvinyl alcohol foam embolic microspheres are medical substances used for embolization of blood vessels. They are mainly composed of polyvinyl alcohol and/or polyglycolide and are specially treated to enable them to swell and embolize blood vessels. Such microparticles are often used in intravascular surgery to prevent blood from flowing into and contaminating the surgical area. In addition, they can also be used to treat ischemic stroke and other vascular diseases.   Features of polyvinyl alcohol foam embolic microspheres include: it can swell upon contact with blood and quickly solidify, thereby effectively embolizing blood vessels. The microspheres are degradable and will be absorbed by the body after a period of time, which helps reduce the risk of complications. In addition, it can be combined with other substances (such as drugs) to achieve specific therapeutic purposes. When using polyvinyl alcohol foam embolic microspheres, strict guidelines and standard operating procedures need to be followed. These microspheres are usually inserted into blood vessels by medical professionals when using endovascular procedures.   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.

PVA is the abbreviation of polyvinyl alcohol, which is a water-soluble polymer material with high hydrophilicity. PVA is often used in the manufacture of cosmetics, paper, glue, coatings, food packaging and other fields. PVA has good solubility. The dissolution method of PVA varies depending on the application field and demand, and each method has its own unique advantages and disadvantages. Choosing a suitable dissolution method can improve the solubility and stability of PVA, making it more widely used in different fields.   1. Temperature rise dissolution method The temperature rise dissolution method is one of the most commonly used methods for dissolving PVA. Add PVA powder to an appropriate amount of water, then stir evenly and heat to an appropriate temperature to completely dissolve the PVA. Normally, the dissolution temperature of PVA is between 60 and 95 ℃. The dissolution temperature of PVA is related to its degree of polymerization and acetate content. The higher the degree of polymerization, the more acetate content, and the higher the dissolution temperature. The solubility and dissolution rate of PVA can be controlled by changing the temperature and time.   2. Dissolution by auxiliary agent In addition to directly adding PVA to water for dissolution, the solubility and stability of PVA can also be improved by adding auxiliary agents. Common auxiliary agents include acetone, methanol, ethanol, phenol, etc. These auxiliary agents can form hydrogen bonds or other interaction forces with PVA, thereby improving solubility. The addition of auxiliary agents can also shorten the dissolution time of PVA.   3. Slow cooling and dissolution The slow cooling method is a special PVA dissolution method, which is suitable for the preparation of polymers, micro-nano particles, films, fibers and other materials. The basic principle of the slow cooling method is to add PVA powder into water, heat it to dissolve it, and then slowly cool it down to make the PVA molecules self-assemble to form nanoparticles, nanofibers or films. The slow cooling rate has an important influence on the self-assembly process of PVA. Generally speaking, the slower the slow cooling rate, the more complete the structure of the PVA self-assembly. The slow cooling method is mainly suitable for the preparation of micro-nano materials.   4. Gas phase dissolution The gas phase method is a relatively new PVA dissolution method. In this method, the PVA solid enters the atmosphere through the dissolution hopper. By controlling the temperature, pressure and atmosphere composition, the PVA solid is directly evaporated into gaseous molecules, and then transported to other equipment through a transmission pipe for reaction or solidification to form a corresponding block. Unlike the traditional dissolution method, the gas phase method can prevent the PVA molecules from being affected by water decomposition, thereby maintaining the integrity and quality of the material.   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.

PVA block copolymer is a polymer with high application value. It is composed of polyvinyl alcohol (PVA) and another organic polymer block. PVA is a colorless, odorless, non-toxic synthetic polymer with good solubility and plasticity. It has good solubility and gelling ability in water and can form strong hydrogels. Therefore, PVA is widely used in fields such as textiles, paper, adhesives, medical supplies, etc.   The choice of another organic polymer block can be determined according to needs. For example, organic polymers with specific functions such as polyacrylate (PAA), polyacrylamide (PAM), etc. can be selected. These organic polymers have different chemical properties and application characteristics, and can play different roles in block copolymers.   The preparation methods of PVA block copolymers include solution copolymerization, emulsion copolymerization, reaction impregnation, etc. Among them, solution copolymerization is one of the most commonly used methods. During the preparation process, PVA and other organic polymers are first added to the solvent in a certain proportion, and then the two polymers are copolymerized by controlling the temperature, reaction time, acid-base balance and other conditions. The final product is a block copolymer with good properties and application value.   The application of PVA block copolymer is very wide. For example, it can be used to prepare highly absorbent materials such as household paper, sanitary napkins, diapers, etc. In addition, it can also be used to prepare medical dressings, drug sustained-release systems, capsule materials, etc.   In general, PVA block copolymers have high research and application value. By rationally selecting blocks and regulating the preparation method, copolymers with specific functions and properties can be obtained to meet the needs of different 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.  

The modified polyvinyl alcohol coated composite film is colorless and has good transparency. It has excellent oil resistance and organic solvent resistance. It has good antistatic properties. It can be used for microwave heating and metal detection of packaged food. It has excellent aroma preservation performance, which can maintain the original flavor of the food in the bag for a long time, and at the same time effectively prevent the odor outside the packaging material from entering the packaging bag.   It has excellent barrier properties for oxygen, nitrogen, hydrogen and carbon dioxide. Its oxygen barrier performance is better than that of PVDC coated film and EVOH five-layer co-extruded film. Its oxygen barrier performance is the best among various resin films, comparable to aluminum foil, glass, aluminum oxide-plated film and silicon oxide-plated film.   The production cost of PVA coated composite film is much lower than that of paper-aluminum-plastic composite and aluminum-plastic composite packaging materials, much lower than that of EVOH five-layer co-extruded film, and lower than that of composite film with PVDC coating.   Satisfactory results can be achieved by using the existing dry laminating machines, coating machines, wet laminating machines, extrusion laminating machines and other equipment of various flexible packaging manufacturers. The modified PVA glue does not form a skin, and the viscosity does not increase significantly during normal use. The coating layer is very thin, but the thickness uniformity of the coating remains excellent.   The structural components of polyvinyl alcohol (PVA) high barrier water-based coating liquid are carbon, oxygen, hydrogen and silicon. It is degradable and recyclable. When burned, it only produces carbon dioxide and water without producing other substances harmful to the environment and human health. It is pollution-free and is an ideal environmentally friendly high barrier packaging material.   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 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.