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The water resistance of polyvinyl alcohol was improved by cross-linking with maleic acid (commonly known as maleic acid, MA). The esterification crosslinking of PVA membrane is achieved through the esterification reaction between PVA molecule and MA at high temperature. The esterification crosslinking reaction actually introduces carbonyl group into the polymer chain of PVA, forming a new polymer, but the main chain of the whole PVA polymer remains unchanged.   The PVA after esterification with MA only has chemical crosslinking, and does not produce a stable crystal structure, so the PVA film is easy to be swollen by water and destroy the structure of the film. Therefore, the PVA film should be heat treated. Since the esterification reaction in the liquid phase is characterized by reversibility, the crosslinking of polymers in the PVA film during the heating process makes the esterification reaction irreversible due to the partial water that has not been removed in the casting liquid and the complete volatilization of the water generated by the esterification reaction of PVA and MA, and the cross-linked PVA film is stable.   PVA can improve the water resistance and poor mechanical properties of PVA by chemical crosslinking with MA. Proper concentration of crosslinker and heat treatment conditions can make PVA obtain better water resistance.   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) contains a large number of hydrophilic hydroxyl groups, which exhibit strong affinity for water during external drying and wetting changes. The use of epoxy resin, with high bonding strength and good stability, as a modifier for PVA is mainly because the epoxy groups in the epoxy resin can react with the hydroxyl groups in PVA to form ethers. To carry out the epoxy resin modification method of PVA, measure the required amounts of PVA and water and add them separately to three-necked flasks equipped with stirring and reflux devices. Start stirring and raise the temperature to 90°C, maintaining the reaction for 1 hour to obtain a PVA aqueous solution of a certain concentration. Cool it to 70°C, increase the stirring speed, and add a specific amount of epoxy resin to the glue solution. Maintain the reaction at this temperature for 2 hours to obtain epoxy resin-modified PVA.   Through orthogonal experiments, it has been determined that the optimal reaction conditions for PVA modification are a PVA concentration of 8%, modification time of 2 hours, epoxy resin addition of 2.4% (mass fraction), and modification temperature of 60°C. Under these conditions, the modified PVA exhibits excellent performance in terms of curing degree, which reaches 89.6%, significantly higher than the curing degree of unmodified PVA, which is 64.5%.   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 versatile synthetic polymer that has found various applications in the field of modern traditional Chinese medicine (TCM) preparations. Its unique properties make it suitable for use in different dosage forms, including tablets, capsules, and topical formulations.  One of the main applications of PVA in TCM preparations is as a film-forming agent. It can form a thin, flexible, and transparent film when applied onto the surface of a tablet or capsule. This film helps in improving the appearance, stability, and shelf-life of the product. Additionally, the PVA film can act as a barrier, protecting the active ingredients from moisture, oxygen, and other environmental factors.   PVA can also be used as a binder in the formulation of TCM tablets. By adding PVA to the powder mixture,it enhances the cohesion and compressibility of the blend, resulting in tablets with improved mechanical strength and reduced friability. This ensures that the tablets retain their integrity during handling, packaging, and transportation.   Furthermore, PVA can serve as a viscosity modifier and suspending agent in liquid TCM formulations. By adjusting the concentration of PVA, it is possible to control the flow and rheological properties of the liquid, allowing for better dispersion and suspension of the active ingredients. This is particularly useful for TCM preparations that contain insoluble or poorly soluble herbal extracts or powders.   Another important application of PVA in TCM preparations is as a component in transdermal patches or topical formulations. Due to its biocompatibility and adhesive properties, PVA can act as a matrix material for delivering TCM active ingredients through the skin. The PVA matrix provides controlled release and prolonged drug delivery, facilitating the absorption of the herbal components into the systemic circulation.   In summary, polyvinyl alcohol has shown great potential in the field of modern traditional Chinese medicine preparations. Its film-forming, binding, viscosity modifying, and transdermal delivery properties contribute to the development of high-tech plastic packaging and improved product formulations, enhancing the efficacy and quality of TCM products.   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.

Water-soluble PVA film refers to a thin film made of polyvinyl alcohol (PVA) that can dissolve in water. PVA is a synthetic polymer that exhibits excellent solubility in water, making it suitable for various applications where easy dissolution is desired.   Water-soluble PVA film has several uses and advantages: 1. Packaging: PVA film is used in the packaging industry, particularly for products that require single-use or dissolvable packaging, such as detergent pods, dishwasher tabs, and personal care products. The film dissolves upon contact with water, eliminating the need for manual unwrapping or disposal.   2. Agriculture: PVA film is employed in agriculture as a biodegradable and water-soluble alternative to traditional plastic mulch films. It can be used to cover crops or seedlings, providing moisture retention, weed suppression, and improved germination, and it naturally degrades over time without leaving behind harmful residue.   3. Education and experimentation: Water-soluble PVA film is often utilized in educational settings and scientific experiments as a safe and convenient material. It can be used for demonstrations, encapsulation of ingredients, or as a release agent for molds, as the film dissolves easily in water.   4. Construction: PVA film finds applications in the construction industry, primarily in the creation of temporary supports or molds for concrete structures. The film can be wrapped around objects or used as a barrier, and once the concrete has set, the film can be dissolved with water, leaving a clean surface.   The biodegradability of PVA film is attributed to the water-soluble nature of PVA. When the film comes into contact with water, the water molecules penetrate and weaken the intermolecular forces holding the polymer chains together, leading to the dissolution and ultimate breakdown of the film into harmless substances.   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.  

VAE stands for Vinyl Acetate Ethylene, which is a copolymer emulsion used in the manufacturing of paints. VAE emulsion is made through the polymerization of vinyl acetate monomers and ethylene. It is commonly used as a binder in water-based paints and coatings.   In paint formulations, VAE provides several benefits: 1. Adhesion: VAE emulsion exhibits excellent adhesion properties, allowing the paint to bond effectively to various surfaces. 2. Flexibility: VAE-based paints form flexible films that can expand and contract with temperature and moisture changes, reducing the risk of cracking or peeling. 3. Water resistance: VAE emulsion enhances the water resistance of paints, making them more durable and suitable for high-humidity environments. 4. Low odor and low VOC: VAE-based paints typically have low odor and emit fewer volatile organic compounds (VOCs), contributing to improved indoor air quality. 5. Good workability: VAE emulsion provides good flow and leveling characteristics, making it easier to apply and achieve a smooth finish.   Additionally, VAE emulsion can be easily blended with other additives and pigments to achieve desired paint properties and colors. Its versatility and performance make it a popular choice for various paint applications, including interior and exterior coatings, architectural paints, and decorative finishes.   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 considered biodegradable due to its chemical structure and properties. PVA is a synthetic polymer that readily undergoes hydrolysis, which is the chemical reaction of a compound with water.    The biodegradability of PVA is attributed to the presence of hydroxyl (-OH) groups along its polymer chain. These hydroxyl groups make PVA water-soluble, allowing microorganisms, enzymes, and natural processes to break down the polymer over time.   When PVA is exposed to moisture or microorganisms, water molecules interact with the hydroxyl groups, causing the polymer chains to break apart. Microorganisms, such as bacteria and fungi, produce enzymes that can hydrolyze the PVA molecules further, ultimately converting them into simpler, non-toxic substances like carbon dioxide, water, and biomass.   The rate of PVA biodegradation depends on various factors such as temperature, pH, moisture content, microbial activity, and the specific formulation of PVA. PVA films or products with higher degrees of hydrolysis and lower molecular weights tend to biodegrade more rapidly.   Overall, the biodegradability of PVA contributes to its environmental friendliness, as it reduces the accumulation of persistent waste in ecosystems and can be a sustainable alternative to non-biodegradable materials in certain applications.   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 versatile polymer that has a wide range of applications in various household products. Some common household products that may contain PVA include:   Adhesives and Glues: PVA is commonly used in adhesives and glues, such as craft glue, white glue, and wood glue.   Laundry Detergents: PVA can be found in some laundry detergents as a film-forming agent that helps prevent dye transfer and improve the appearance and durability of fabrics.   Dishwashing Detergents: PVA may be present in certain dishwashing detergents as a thickener or stabilizer, helping to create a desired consistency and enhance the cleaning performance.   Personal Care Products: PVA can be found in various personal care products like shampoos, conditioners, hair sprays, and styling gels. It functions as a film-forming agent, providing hold, shine, and humidity resistance to hair.   Eye Drops and Artificial Tears: PVA is used in some eye drops and artificial tears to provide lubrication and relieve dryness and discomfort in the eyes.   Surface Coating and Sealants: PVA-based coatings and sealants are used for various applications, including wood coatings, paper coatings, and surface sealing agents.   Slow-Release Fertilizers: PVA can be incorporated into slow-release fertilizers to control the release of nutrients over an extended period, improving plant growth and reducing nutrient leaching.   It's important to note that the specific formulation of household products may vary, and not all products in these categories will necessarily contain PVA. Always refer to the product labels or consult the manufacturers for accurate information on product composition.   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.  

RDP emulsion refers to a Redispersible Polymer Powder (RDP) emulsion. RDP is a polymer powder that can be easily dispersed in water to form a stable emulsion. It is typically composed of polymer resins, plasticizers, and other additives.   RDP emulsions are commonly used in various industries, including construction, coatings, and adhesives. Some of their main uses include:    1. Construction Applications: RDP emulsions are widely used in construction applications, such as tile adhesives, grouts, self-leveling compounds, and cement/render mortars. They enhance the workability, adhesive strength, and flexibility of these materials, improving their performance and durability.   2. Coatings and Paints: RDP emulsions are utilized in water-based coatings and paints. They contribute to improved film formation, bonding strength, and water resistance. RDP emulsions are commonly used in exterior paints, interior wall coatings, and decorative finishes.   3. Textile Applications: RDP emulsions can be used as binders in textile printing and finishing processes. They help improve the adhesion of dyes and pigments to textiles, enhance color fastness, and provide fabric stiffness and durability.    4. Adhesives: RDP emulsions are employed in various adhesive formulations, such as wood adhesives, paper bonding adhesives, and laminating adhesives. They improve the adhesive strength, tackiness, and bonding performance of the adhesives.   5. Other Applications: RDP emulsions find use in other areas, including paper coatings, leather treatments, and ceramic applications.   Overall, RDP emulsions play a crucial role in enhancing the performance and properties of various products, providing improved adhesion, flexibility, water resistance, 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.

Polyvinyl alcohol (PVA) eye drops are a type of lubricating eye drops used to relieve dryness, irritation, and discomfort in the eyes. PVA is a water-soluble polymer that forms a protective film on the surface of the eye, providing lubrication and moisturizing effects.   The advantages of PVA eye drops include:  Lubrication: PVA forms a smooth and slippery coating on the eye surface, reducing friction and improving comfort. Moisturization: PVA eye drops help retain moisture in the eyes, preventing dryness and relieving symptoms associated with dry eye syndrome. Compatibility: PVA is compatible with the natural tear film of the eye, making it well-tolerated and suitable for long-term use. Clarity: PVA eye drops are clear and do not cause blurry vision, allowing for clear vision after application. Preservative-free options: Some PVA eye drops are available in preservative-free formulations, which are recommended for individuals with sensitivity to preservatives. Versatility: PVA eye drops can be used by individuals wearing contact lenses, as they provide moisture and lubrication without interfering with lens wear.   However, it's important to note that individual experiences may vary, and it is best to consult with an eye care professional for proper diagnosis and recommendation of eye drops suitable for your specific needs.   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) fibers and polypropylene fibers are two different types of synthetic fibers used in various applications. Here are some differences between the two: Material: PVA fibers are made from polyvinyl alcohol, while polypropylene fibers are made from polypropylene. The chemical composition of the two materials is different, resulting in differences in their properties. Strength: PVA fibers have higher tensile strength compared to polypropylene fibers. This means that PVA fibers are generally stronger and more resistant to breaking or stretching. Water Solubility: PVA fibers are water-soluble, meaning they can dissolve in water. This property allows them to be used in applications where temporary support or reinforcement is needed, such as in concrete or fabric manufacturing. On the other hand, polypropylene fibers are not soluble in water and are more resistant to moisture. Chemical Resistance: PVA fibers are more chemically resistant compared to polypropylene fibers. They can withstand exposure to acids, alkalis, and organic solvents, making them suitable for applications where chemical resistance is required. Thermal Properties: PVA fibers have a lower melting point than polypropylene fibers. This means that PVA fibers are more susceptible to heat and can melt or lose their structural integrity at lower temperatures compared to polypropylene fibers. Cost: Polypropylene fibers are generally less expensive compared to PVA fibers. The cost difference is mainly due to differences in raw material costs and manufacturing processes.   It's important to consider the specific requirements and intended application when choosing between PVA fibers and polypropylene fibers, as their different properties can make them more suitable for specific applications.   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 (#Polyvinyl alcohol) fiber is commonly used as a reinforcing material in concrete. Here are some advantages of using PVA fiber in concrete: Enhanced tensile strength: PVA fiber improves the tensile strength of concrete, making it more resistant to cracking and structural failure. Improved durability: The inclusion of PVA fiber in concrete enhances its resistance to freeze-thaw cycles and reduces the risk of cracking due to temperature variations. This improves the overall durability of concrete structures. Increased impact resistance: PVA fiber reinforcement improves the impact resistance of concrete, making it more resistant to damage from heavy loads, impact forces, and dynamic loads. Enhanced crack control: PVA fibers help control the formation and propagation of cracks in concrete. They act as micro-reinforcement, distributing stress and preventing cracks from widening. Reduced shrinkage cracking: PVA fiber mitigates the risk of shrinkage cracking in concrete by reducing the drying shrinkage and minimizing the formation of shrinkage cracks. Improved workability: PVA fibers enhance the workability of concrete, making it easier to handle, pump, and place. They improve the cohesiveness and consistency of the concrete mix. Increased fire resistance: PVA fibers improve the fire resistance of concrete by reducing the propagation of flames and minimizing the risk of spalling. Enhanced resistance to chemical attack: PVA fibers exhibit good resistance to various chemicals, including acids and alkalis, which can help protect concrete from chemical degradation. The use of PVA fiber in concrete offers numerous advantages, including increased strength, enhanced durability, improved crack control, and better resistance to various external factors. These benefits make PVA fiber a valuable reinforcement material in concrete construction.   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.  

Concrete with PVA fiber refers to a type of concrete mixture that incorporates polyvinyl alcohol (PVA) fibers into its composition. PVA fibers are synthetic fibers made from polyvinyl alcohol polymer. When added to concrete, these fibers enhance its strength, durability, and crack resistance.   The presence of PVA fibers in concrete helps to distribute stress more evenly throughout the material, reducing the formation and propagation of cracks. These fibers act as reinforcement, improving the tensile strength and impact resistance of the concrete. Additionally, PVA fibers improve the durability of concrete by reducing shrinkage and controlling the formation of microcracks.   The use of PVA fiber in concrete is beneficial in various applications, especially in areas where concrete structures are subjected to heavy loads, thermal stresses, and environmental factors. It finds application in industrial floors, bridge decks, pavements, precast elements, shotcrete, and other demanding construction projects.   Overall, concrete with PVA fiber offers enhanced mechanical properties, improved crack control, and increased durability, making it a favorable choice in demanding construction applications.   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.