PVA 0588

China is one of the world's largest PVA production countries, since 1965 Beijing Oriental Petrochemical Co., LTD. (the former Beijing Organic Chemical plant) from Japan to introduce technology to build China's first set of calcium carbide acetylene method (from calcium carbide acetylene method to petroleum ethylene method in 1995) PVA production plant, China's PVA production has developed steadily.   According to statistics, in 2015, China's polyvinyl alcohol (PVA) production was about 700,000 tons, increasing to 802,000 tons in 2022, with a compound annual growth rate of 1.96% during the period. In terms of demand, the apparent consumption of PVA in China in 2022 was 639,600 tons, an increase of 2.16%. Common types such as PVA 2488, PVA 2088 and PVA 0588 are in great demand in various fields.   Output and consumption

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  

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.  

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.  

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    

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.

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.

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 water-soluble polymer commonly used in wastewater treatment facilities for various applications. Here are some ways PVA is utilized in these facilities:   Flocculation: PVA can act as a coagulant or flocculant in wastewater treatment processes. It helps to bind together suspended particles, colloids, and other impurities, forming larger flocs that can be easily removed from the water.   Sludge conditioning: PVA is used as a sludge conditioner to improve the dewatering properties of sludge. When added to the sludge, it enhances the formation of stronger flocs, which aids in the separation of water from the sludge during dewatering processes such as centrifugation or filtration.   Filtration aid: PVA can be added to filtration systems as an aid to improve the filtration efficiency. It can help in the removal of fine suspended solids, improve the clarity of the treated water, and prevent clogging of filter media.   Foam control: In wastewater treatment facilities, excessive foam can hinder the proper operation of processes such as aeration tanks and clarifiers. PVA is used as an antifoaming agent to reduce foam formation and stabilize the foam that may already be present.   Membrane applications: PVA is also employed in membrane-based processes such as reverse osmosis and ultrafiltration. It can be used as a membrane modifier to enhance the membrane's performance, selectivity, and resistance to fouling.   It's important to note that the specific application and dosage of PVA in wastewater treatment vary depending on the treatment process, water quality, and desired outcomes. Proper understanding and consideration of the system requirements are necessary to ensure effective and sustainable use of PVA in wastewater treatment facilities.   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.

Polyethylene wax emulsion and polyvinyl alcohol (PVA) are commonly used water-based additives in the paper industry. Can they be added together and used in the paper system?   Polyvinyl Alcohol (PVA): An organic compound, white plate-like, flocculent, or powdery solid with no odor. PVA has strong adhesion to cellulose and exhibits good film-forming properties, resulting in high film strength. In the paper industry, PVA is primarily used as a surface sizing agent, pigment binder, and refining machine additive. It improves the paper's abrasion resistance, fold resistance, tear strength, gloss, smoothness, and print adaptability.   Polyethylene wax emulsion is a non-ionic emulsion that is tasteless, non-corrosive, acid-resistant, alkali-resistant, hard water-resistant, highly water-soluble, and exhibits good stability. It can be diluted with water in any proportion without layering, creaming, or agglomerating. The emulsion has a long shelf life, high solid content, and good dispersibility.   Experimental evidence has shown that there is generally no chemical reaction between polyethylene wax emulsion and polyvinyl alcohol (PVA). PVA solutions are highly stable and belong to water-soluble inert polymers, which do not interact with most solvents except boronic acid compounds, and they do not react with almost all non-polar waxes or neutral organic compounds.   Therefore, in the paper system, polyethylene wax emulsion can be mixed and used with polyvinyl alcohol, and the performance is also very stable.   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.