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  • Global consumption structure and Development trends of Polyvinyl Alcohol (PVA)
    Jul 06, 2023
    The global consumption structure of polyvinyl alcohol (PVA) is: polymerization assistants account for about 24%, polyvinyl butyral (PVB) accounts for about 15%, adhesives account for about 14%, textile pulp accounts for about 14%, and paper pulp Materials and coatings account for about 10%, and others 23%.   The consumption structure of polyvinyl alcohol (PVA) in China is: polymerization assistants account for about 38%, fabric slurries account for about 20%, adhesives account for about 12%, vinylon fibers account for about 11%, papermaking slurries and coatings account for about 8% %, architectural coatings account for about 5%, and others 6%. Polymerization aids, fabric sizing and adhesives are the main downstream consumer markets for polyvinyl alcohol.   In the first half of 2023, the supply and demand of China PVA products were in a weak balance, and prices were running at low levels. The advantages of China PVA variety in supporting a stable market share. With the introduction of new technologies, new processes, and new products, the continuous expansion of new application fields, and the gradual replacement of imported products, new development opportunities have been brought to the domestic polyvinyl alcohol and vinylon industry. However, as various companies increase their export efforts and adopt fierce competition at the low end, and with the adjustment of China's industrial structure, rising wages and other costs, and high environmental protection requirements, some downstream industries, such as the labor-intensive textile industry, have relocated to Southeast Asia, making domestic Demand growth momentum has slowed, foreign consumption has increased, and exports have increased. After more than ten years of competitive integration and optimization, the industry is showing a new pattern of optimized production capacity, increased concentration, stable market varieties, slow growth in market demand, high technical barriers, moderate competition, and innovation-driven development, reaching a new balance between supply and demand. Develop into a benign new business format.   With the rapid development of PVA downstream industries such as PVA optical film, PVB film, polymerization additives, soil improvement, paper adhesives, ceramic adhesives, environmental protection, medicine and cosmetics, the demand for special PVA products is very strong, and Anhui The special PVA products of leading enterprises in the industry represented by ElephChem have developed rapidly, and they have increased their research and development efforts on PVA fiber, PVB resin, PVB film, PVA optical film, redispersible rubber powder and other products. Special varieties of PVA and The production technology of downstream new material products is becoming increasingly mature, filling many gaps in the country. New PVA products are gradually being put on the market, and their market share is also constantly increasing. Common varieties have basically achieved import substitution, and the downstream consumption structure of the domestic PVA industry has been further expanded.
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  • Supply and demand status of polyvinyl alcohol (PVA) industry
    Mar 14, 2023
    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
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  • Application of polyvinyl alcohol(PVA) in adhesives
    Sep 09, 2020
    The aqueous solution of PVA has extremely strong adhesion to materials containing cellulose (such as paper, cloth, wood, etc.) and has the advantage of being safe and non-toxic. It can be used for cardboard lamination, corrugated cardboard bonding and office glue. Kraft bags used for packaging heavy items such as cement, fertilizers, grain, etc. also use PVA as an adhesive.   Urea-formaldehyde resin and phenolic resin modified with PVA can be used as adhesives for laminates and artificial panels.   PVA aqueous solution (by adding appropriate fillers and additives) can also be widely used to prepare adhesives required for printing and binding paper tubes, cartons and other paper links.   PVA condenses with formaldehyde, butyraldehyde, glyoxal or other aldehydes under acid catalysis to produce polyvinyl acetals (such as PVAF, PVB) with stronger water resistance, adhesion and mechanical strength. ) is widely used in construction, coatings, adhesives, safety glass interlayers and other fields. As the degree of polymerization of PVA increases, the viscosity of the acetal increases.   PVA is an excellent protective colloid and dispersant for the homopolymerization of vinyl acetate or copolymerization with other monomers to produce emulsions (white glue), and is crucial in the production of white glue. Generally, as the degree of polymerization of PVA increases, the viscosity of the produced emulsion increases. Partial alcoholysis polyvinyl alcohol (such as PVA 17-88, PVA 24-88) is often used in combination with fully alcoholysis polyvinyl alcohol(PVA 17-99). The use of partially alcoholytic PVA can increase the stability of the emulsion. Use Completely alcoholylated PVA can increase the water resistance of emulsions.   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   PVA 1788 & 088-20   PVA 17-99 & 100-27    
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  • What are the properties of VAE emulsion adhesive?
    Sep 01, 2020
    The ethylene segment is introduced into the VAE emulsion molecule, which acts as a plasticizer and reduces the glass transition temperature and film-forming temperature, thus giving the VAE emulsion adhesive many excellent properties. 1. It has good initial tack, wet tack and fast curing speed. It can harden the conjunctiva in 5-10 minutes at room temperature. So it is stable in storage. 2. The cured adhesive film is colorless and transparent, flexible and not brittle, with good resilience and an elongation of up to 600%. 3.  Good water resistance, alkali resistance, wear resistance, creep resistance, freeze-thaw resistance. The performance of VAE film will not change even after being soaked in weak alkali and weak acid media for 1 year. 4. Good weather resistance, UV resistance, not easy to oxidize and age. 5. It is non-toxic, odorless and harmless, suitable for hygiene and food purposes. It can be used to produce hygiene materials, such as sanitary napkins, diapers, medical cloths, wipes, surgical caps and other disposable cloths and food packaging. 6. Good compatibility with other water-based adhesives. And it is easy to modify to obtain new properties. 7. Low surface force, suitable for bonding materials with low surface properties, such as PE, PP, PS, etc. 8. It has strong adaptability and excellent adhesion to a variety of materials, especially film products such as PVC, PET, PA, etc. 9. The dry adhesive film after the water has evaporated can be hot-melt sealed at a heat sealing temperature of 82-90°C. 10. It is easy to apply and clean glue, convenient and safe to use.   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 VAE emulsion in textile industry
    Aug 28, 2020
      VAE (vinyl acetate-ethylene) emulsion is widely used in the textile industry for various applications. Some of the key applications of VAE emulsion in the textile industry include:   1. Textile binders: VAE emulsions are used as binders in textile printing and finishing processes. They provide excellent adhesion and cohesion properties, allowing the pigments and other additives to adhere to the fabric effectively.   2. Non-woven fabrics: VAE emulsions can be used as binders in the production of non-woven fabrics, such as spunbond, meltblown, and needle-punched fabrics. They enhance the strength, stability, and durability of the non-woven fabrics.   3. Carpet backing: VAE emulsions are commonly used as binders for carpet backing. They provide good adhesion between the carpet fibers and the backing material, ensuring the stability and longevity of the carpet.   4. Textile coatings: VAE emulsions can be applied as coatings on textiles to improve their performance properties. They can enhance the fabric's water repellency, stain resistance, and durability.   5. Textile laminates: VAE emulsions are used in the production of textile laminates. They are applied as adhesive layers between different fabric layers or between fabric and other materials to create laminate structures with desired properties.   6. Textile sizing: VAE emulsions can be used as a component of sizing formulations, which are applied to yarns or fabrics to improve their weaving or knitting performance. The VAE emulsion provides lubrication and film-forming properties, reducing yarn breakage during the weaving or knitting processes.   Overall, VAE emulsions offer versatile properties that make them suitable for various applications in the textile industry, providing enhanced performance, durability, and aesthetics to textile 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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  • 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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