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  • What are the applications of PVA in agriculture?
    Aug 20, 2020
      Polyvinyl alcohol (PVA) has several applications in agriculture, including:   1. Seed coating: PVA can be used as a seed coating material to enhance germination, improve seedling growth, and provide protection against pests and diseases.   2. Soil stabilizer: PVA can be added to soil to improve its structure and stability, especially in erosion-prone areas. It helps reduce soil erosion, increase water retention, and enhance soil fertility.   3. Mulching film: PVA films can be used as mulching materials to cover the soil around plants. This helps to conserve moisture, control weed growth, and maintain stable soil temperatures, leading to improved plant growth and higher crop yields.   4. Slow-release fertilizers: PVA can be incorporated into fertilizer formulations to create slow-release or controlled-release fertilizers. This allows nutrients to be released gradually over time, providing sustained nutrition to plants and minimizing nutrient leaching.   5. Crop protection: PVA can be used as a component in biodegradable agricultural films for crop protection purposes. These films can be used for insect barriers, weed control, and microbial resistance, reducing the reliance on conventional plastic films.   6. Hydrogel applications: PVA hydrogels have been utilized in agriculture for various purposes, such as water retention in drought-prone areas, as carriers for controlled release of agrochemicals, and as bio-based materials for seed germination and plant growth.   These applications demonstrate the versatility of PVA in agriculture, providing solutions for improving plant growth, conserving resources, and promoting sustainable farming practices.   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.  
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  • Application of Polyvinyl Alcohol(PVA) in films
    Aug 08, 2020
    Polyvinyl alcohol (PVA) has various applications in the film industry. Here are some of the common applications of PVA in films:   1. Water-soluble film: PVA can be used to produce water-soluble films that are used for packaging various products such as detergents, agrochemicals, and personal care products. These films dissolve in water, providing convenience and reducing waste.   2. Food packaging film: PVA can be used as a coating or component in food packaging films. It provides excellent oxygen barrier properties, moisture resistance, and aroma retention, helping to extend the shelf life of food products.   3. Biodegradable film: PVA can be used to produce biodegradable films that are environmentally friendly. These films can replace traditional plastic films in applications such as mulch films, agricultural films, and compostable packaging materials.   4. Drug delivery films: PVA films can be used as drug delivery systems in the pharmaceutical industry. These films can be loaded with active pharmaceutical ingredients and used for transdermal patches, oral dissolvable films, or other drug delivery applications.   5. Optical film: PVA can be used in the production of optical films for applications such as LCD displays and optical lenses. These films provide excellent optical clarity, high transparency, and low birefringence.   6. Photographic film: PVA has been widely used in the production of photographic films. It acts as a binder and protective coating, ensuring adhesion of the photo emulsion to the film base and providing surface protection.   Overall, PVA has versatile properties that make it suitable for a wide range of film applications, including water-soluble films, food packaging films, biodegradable films, drug delivery films, optical films, and photographic films.   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 088-50 & PVA 24-88 Polyvinyl alcohol PVA 088-20 & PVA 17-88 Polyvinyl alcohol PVA 100-27 & PVA 1799 Polyvinyl alcohol    
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  • Application of PVA in paper industry
    Aug 02, 2020
    Polyvinyl alcohol (PVA) is widely used in the paper industry due to its excellent film-forming and adhesive properties. PVA is typically used in the paper manufacturing process as a binder, coating agent, or surface sizing agent. Here are some common applications of PVA in the paper industry:   1.Surface Sizing: PVA is used as a surface sizing agent to improve the surface properties of paper, such as its smoothness, printability, and water resistance. It forms a thin film on the surface of the paper, reducing the penetration of liquids and improving the ink receptivity.   2. Binder for Coatings: PVA is used as a binder in the formulation of coatings applied to paper surfaces. It helps in binding pigments and other additives to the paper, enhancing the color retention, gloss, and overall performance of the coatings.   3. Adhesive for Paperboard: PVA is utilized as an adhesive in the production of paperboard and cardboard boxes. It provides excellent adhesion between the layers of paper, improving the overall strength and durability of the packaging materials.   4. Release Agent: PVA can be used as a release agent in the paper industry. It is applied to the surfaces of rollers and machinery to prevent sticking and improve the smooth flow of paper during the production process.   5. Fiber Treatment: PVA can be applied to paper fibers to improve their bonding properties and enhance the paper's strength and tear resistance.   It's important to note that the specific grade of PVA used in the paper industry may vary depending on the desired properties and requirements of the paper or paperboard being produced.   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 088-08 & 05-88   PVA 100-27 & 17-99   PVA 088-20 & 17-88  
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  • Polyvinyl alcohol for textile sizing
    Apr 02, 2024
    Polyvinyl alcohol (PVA) is used in textile sizing, which is the process of applying a protective coating to yarn or fabric to enhance its weaving and handling properties. In textile sizing, various grades of PVA can be utilized, depending on the specific requirements of the sizing process and the desired characteristics of the finished textile product.   The selection of the PVA grade depends on factors such as the desired viscosity, film-forming properties, adhesion strength, and water solubility. Generally, medium-to-high molecular weight PVA grades with moderate viscosity are preferred for textile sizing applications. These grades offer good film-forming ability, excellent adhesion to the fibers, and compatibility with other sizing agents.   PVA-based sizing formulations may also include additional additives like lubricants, softeners, antistatic agents, and crosslinking agents to further enhance the performance and processability of the sized yarn or fabric.   It's worth noting that the specific PVA grade and formulation used for textile sizing can vary depending on the type of textile fibers being sized (e.g., natural or synthetic fibers), weaving techniques, and the desired properties of the final textile product.   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.
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  • Pharmaceutical grade polyvinyl alcohol
    Jul 20, 2020
    Pharmaceutical grade polyvinyl alcohol (PVA) is a high-purity form of PVA that meets specific quality standards and regulations for use in the pharmaceutical industry. It is used in various pharmaceutical applications, including as a binder, film former, coating agent, and viscosity modifier.   Pharmaceutical grade PVA undergoes stringent quality control processes to ensure its purity, stability, and safety. It is typically produced using high-quality raw materials and advanced manufacturing techniques to meet the strict requirements of the pharmaceutical industry.   The properties of pharmaceutical grade PVA, such as its solubility, viscosity, and film-forming characteristics, can be tailored to suit specific pharmaceutical formulations. It is often used in the production of tablets, capsules, oral suspensions, ophthalmic solutions, and topical formulations.   Due to its biocompatibility, low toxicity, and good film-forming properties, pharmaceutical grade PVA is widely accepted and used in the pharmaceutical industry. It plays a crucial role in improving the stability, bioavailability, and overall performance of pharmaceutical 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.  
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  • Succinic acid modification method of polyvinyl alcohol
    Jul 15, 2020
    Using succinic acid as the cross-linking agent, through the reaction of COOH- and OH-, an ester group is generated, which cross-links the PVA molecules and generates a modified PVA glue that is insoluble in water. The introduced COOH-group can improve its water resistance, hardness, adhesion, etc.   Weigh an appropriate amount of PVA, add water, heat it in a water bath with electric stirring, and control the water bath temperature to 80-90°C. After it is completely dissolved, stop heating to obtain PVA glue. In a water bath at a certain temperature, add an appropriate amount of succinic acid to the above-mentioned PVA glue, stir it under closed conditions to react, and cool to room temperature to obtain a modified PVA glue.   Using succinic acid as the cross-linking agent, PVA glue was modified, and the optimal modification conditions were determined to be: PVA glue mass concentration 7%, reaction temperature 85°C, and PVA glue to succinic acid mass ratio 5.6:1. Here Under the conditions, the hardness, adhesion, viscosity and impact resistance of the modified PVA glue obtained were significantly improved, and the water resistance was also improved. This method can be used to prepare PVA adhesives and coatings that require high adhesion and 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.  
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  • Butenol modification method of polyvinyl alcohol
    Jul 09, 2020
    Polyvinyl acetal mixed aldehyde adhesive can be prepared by using polyvinyl alcohol (PVA) and crotonaldehyde as the main raw materials, hydrochloric acid (HCl) as the catalyst and acetaldehyde as the modifier.   Put a certain amount of PVA into a three-necked flask equipped with a mechanical stirrer and a reflux condensation device, add deionized water, adjust the water bath temperature to 95°C, and keep it warm for 2 hours to fully dissolve it; when the solution cools to room temperature, Slowly add measured HCl dropwise while stirring, and mix thoroughly; heat the water bath to the specified temperature, add crotonaldehyde and acetaldehyde solutions according to the formula, and stir thoroughly; after the reaction is completed, use NaOH solution to adjust the pH value to 8 to 9, and then add Add appropriate amount of urea and stir for 20 minutes.   The results show that when the reaction temperature is (90±2)℃, the reaction time is 4 h, 8% PVA solution is 200 mL, HCl is 1mL, crotonaldehyde is 1.0~1.5mL, and acetaldehyde is 4mL, acetalization The viscosity of the product is moderate, the bonding strength is relatively maximum (4.5MPa), and the water resistance is relatively good; under the premise that other conditions remain unchanged, by changing the amount of crotonaldehyde, the final viscosity of the system can be further adjusted to meet the requirements of wood. Adhesive usage requirements.   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 2488 & 088-50 Modified PVA 725 PVA 1788 & 088-20    
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  • Nano-silica modification of polyvinyl alcohol
    Jul 02, 2020
    By adding nanoscale reinforcements to the composite matrix, the mechanical properties of the composite (such as strength, stiffness, elastic modulus, etc.) can be significantly improved. The polyvinyl alcohol adhesive modified with nano-silica particles is non-toxic and pollution-free. It will be widely used and is worthy of systematic research.   Current research on the modification of nanoparticles mainly focuses on the following two aspects: one is to use silica as the base, modify its surface with a modifier, and then graft the polymer; the other is to use the polymer as the base, and then graft it. branch modifier, and then graft silica. To modify nanosilica, it is generally dispersed in an organic solvent and then a modifier is added.   Introducing inorganic nanoparticles into the adhesive for modification can improve its tensile bonding strength and elongation at break. When the dosage of nanoparticles is within a certain range, the nanoparticles can be well dispersed into the adhesive matrix. Because of their huge specific surface area, they can interact strongly with the adhesive matrix, thus improving the mechanical properties of the adhesive. However, if the dosage exceeds a certain range, serious agglomeration will occur, the particle interface area will be reduced, the interaction between the nanoparticles and the adhesive matrix will also be weakened, and the content of reactive nanoparticles will be reduced, resulting in a reduction in its mechanical properties. . The mechanical property test results of the nano-modified adhesive show that when the dosage of nano-silica particles is 4%, the various performance indicators of the modified adhesive reach the maximum value.   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.
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  • Maleic acid modification of polyvinyl alcohol
    Jun 24, 2020
    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.  
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  • Epoxy resin modification method of polyvinyl alcohol
    Jun 10, 2020
    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.
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  • Application of PVA in modern traditional Chinese medicine preparations
    Jun 05, 2020
    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.
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  • Water soluble pva film
    May 28, 2020
    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.  
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