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The shift toward green packaging in the food industry is imperative.   Flexible packaging is becoming really important in the food industry. This product is safe for the environment and doesn’t contain any toxic materials. Unlike PVDC, it leaves no solvent residues and doesn’t release harmful gases when burned, so it’s a better choice for sustainability.   Under the same conditions, its oxygen barrier performance is 50 times higher than that of PVDC, effectively addressing many challenges in the packaging industry.   Polyvinyl alcohol (PVC Grade) coated film is a novel, eco-friendly, high-barrier packaging material that can replace PVDC in general food packaging applications while also meeting stricter environmental requirements in other packaging fields.   Differences Between PVOH High-Barrier Coated Film and K-Film     1. Structure: Self-adhesive, no primer required.        2. Performance:   Eco-friendly & Cost-Efficient: Low coating weight, no organic solvents used, no solvent emissions or residues. Superior Oxygen Barrier: Thinner coating, lower haze, higher transparency, and exceptional oxygen barrier performance. Higher Yield: It offers a bigger packaging area, about 15% more per roll than K-film of the same weight and width, which means you can pack more products. . Recyclability: The PVOH-coated film is both degradable and recyclable.   In summary, this eco-friendly PVOH (PVOH 552 & Aclotex B72) -coated film could fill a gap in the market. It can replace traditional PVDC in food packaging and meet the needs of industries focused on environmental issues. Plus, it effectively handles current sustainability challenges and provides good oxygen barriers for flexible food packaging.It's likely to take the place of a lot of metallized film packaging out there.   This new product is designed to tackle the ongoing issue of plastic waste in food packaging and support the move towards eco-friendly materials in China.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com    

Polyvinyl butyral resin (PVB) is a white powder made from polyvinyl alcohol (PVAL) and butyraldehyde.  Polyvinyl butyral (PVB) is a white powder made from polyvinyl alcohol (PVA) and butyraldehyde. PVB is primarily used in the production of interlayer films for laminated glass , as well as in coatings  and adhesives.   Currently, global PVB resin production is concentrated in the United States, Western Europe, and Japan, with the U.S. being the largest producer and consumer. China started its PVB industry in the 1950s, but it didn't pick up pace until the breakthroughs in ceramic decals and vacuum aluminum plating during the Seventh Five-Year Plan from 1986 to 1990, which really kicked off growth in the sector. The primary use of PVB resin is as a high-viscosity raw material for PVB films, which serve as interlayers in safety glass. Additionally, it is widely used in coatings, adhesives, ceramic decals, and aluminum foil paper.   PVB films are essential for making safety and bulletproof glass.  These films are placed between regular glass to make safety glass. This type of glass is really strong, flexible, lets light in well, and can handle different weather. It helps stop glass from breaking when it's hit hard, making it safer. PVB-laminated safety glass is clear and resistant to water and aging, performing well even in very low temperatures.  It can also serve as a substitute for acrylic.   PVB has certain chemical groups that give it strong adhesive properties, making it great for various adhesives used in glass, metal, enamel, and labels.   More people are getting filter-tipped cigarettes as their living standards improve. To promote better health, officials are now making it a rule that all premium cigarettes must have filters. This means there's a big jump in the use of tipping paper and, as a result, more PVB adhesive is being used too.   PVB can be mixed with other resins to improve bonding, creating adhesives for a range of materials including wood, ceramics, metals, plastics, and leather.   Due to its high bond strength, cold resistance, oil resistance, wear resistance, and corrosion resistance, PVB (PVB Resin B-03HX & Butvar B-79) is widely used in wood coatings, metal coatings, metal primers, metal inks, foil coatings, vacuum metallization coatings, concrete coatings, waterproof coatings, leather coatings, and glossy surface protective coatings.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

By the end of 2023, China's annual Ethylene-VinylAlcohol Copolyme (EVOH) consumption will be about 30,000 tons, but more than 90% of it is dependent on imports, mainly from international giants such as Japan Kuraray (Kuraray) and Japan Synthesis Chemical (JSR).     Chuanwei Chemical (a subsidiary of SINOPEC) is currently the closest to the industrialized production of EVOH enterprises, has built an annual output of 12,000 tons of EVOH (including EVOH EW-3201 and EVAL C109B) production equipment, and plans to add 24,000 tons of new production capacity in the future, with a total production capacity of 36,000 tons/year, which is expected to be the first enterprise to achieve large-scale production in China. Leveraging alkaline deep eutectic solvents, the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, has pioneered an ethylene vinyl alcohol (EVOH) production method that significantly cuts separation expenses and elevates product purity. This breakthrough offers critical technical underpinnings for domestic EVOH manufacturing.   Concurrently, the Shenzhen Institute of Advanced Polymer Research has achieved a milestone by developing EVOH resins, utilizing continuous polymerization and precise control over polymer chain segments, that match the performance of leading international brands, effectively addressing a critical void in domestic EVOH technology.   Policy support: the national “14th Five-Year Plan” clearly puts forward to strengthen the independent research and development of high-end polymer materials, EVOH as a high-performance barrier material, by the policy encouragement and industrial funding support.   Market prospect: It is expected that after 2025, with the commissioning of domestic enterprises such as Chuanwei Chemical, the annual production capacity of EVOH in China is expected to exceed 50,000 tons, which will significantly reduce the dependence on imports, and some of the products may even be exported to the international market.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com    

EVOH (Ethylene Vinyl Alcohol Copolymer) is considered to be a more environmentally friendly material, mainly in terms of its advantages in reducing food waste, prolonging product freshness, and in the recycling process.EVOH's gas barrier properties are excellent, and it can effectively prevent oxygen, water vapor, and other substances from entering into the package, thus prolonging the shelf-life of the food, and reducing food spoilage and waste. This feature makes EVOH particularly important in food packaging, and can significantly reduce the environmental burden caused by food expiration or spoilage.     In addition, EVOH has good recyclability, and although its recyclability is not as good as that of materials such as PE (polyethylene) and PP (polypropylene), it can be used in combination with these materials to take advantage of the strengths of both materials; PE and PP have better mechanical strength and chemical resistance, while EVOH provides a better barrier to gases. Through composite use, this multi-layer packaging material ensures packaging functionality while allowing for easier disposal during recycling, helping to reduce resource waste.   What's more, EVOH is produced in a relatively environmentally friendly manner and does not release harmful substances during its use. Compared to other traditional plastic materials, the use of EVOH reduces the need for chemical additives, further minimizing the impact on the environment. Therefore, EVOH (EVOH EW-3801 & EVAL F101A) is playing an increasingly important role in promoting green packaging and circular economy, becoming an environmentally friendly and sustainable packaging material.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com    

I. Definition of Carboxylated Polyvinyl Alcohol (CPVA)Carboxylated polyvinyl alcohol（CPVA) is a hydrogen-modified polymer obtained through a carboxylation reaction based on polyvinyl alcohol (PVA，PVA 088-60 & PVA 2688). CPVA  has typically higher solubility and better performance than unmodified PVA.     II. Functions of Carboxylated Polyvinyl Alcohol PlasticizerCPVA can be used as a plasticizer to improve the processing properties and flexibility of plastics. It is often used in the production of soft plastics, coatings, and rubber products. AdhesiveCPVA can act as an adhesive, forming strong bonds between different materials. For example, when used as glue, it can bond materials such as paper, wood, and plastic together. LubricantCPVA can function as a lubricant, reducing friction on contact surfaces and extending the lifespan of materials. It is commonly used in industrial applications such as metalworking, textile manufacturing, and plastic processing. III. Applications of Carboxylated Polyvinyl Alcohol Packaging MaterialsCPVA is used in manufacturing food packaging materials, such as wrapping paper, plastic films, and straws. This polymer is not only safe and environmentally friendly but also provides excellent flexibility and water resistance, offering effective protection for food packaging. Paper CoatingCPVA is used to coat paper, enhancing its strength and water resistance. It is commonly applied in the production of books, magazines, and other paper-based products. Medical FieldCPVA is used to manufacture medical products, such as sutures and artificial cartilage. It has good biocompatibility and poses no adverse effects when in contact with human tissues, ensuring the safety and reliability of medical materials.   ConclusionCarboxylated polyvinyl alcohol is a multifunctional material with applications as a plasticizer, adhesive, and lubricant. It is widely used in packaging materials, paper coatings, and the medical field.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

EVOH (Ethylene-Vinyl Acetate Copolymer), is a plastic known for keeping gases out. You’ll often see it in food packaging, medical supplies, and protective gear for cars and electronics. Because it contains a lot of vinyl acetate, it does a great job blocking gases like oxygen and nitrogen, which helps food stay fresh longer.     The reason EVOH is so effective at this is because of its tightly packed structure, which makes it harder for gas molecules to sneak through.  Manufacturers can tweak the hydrolysis level during production, and when they increase it, the molecular chains become tighter, improving its gas-blocking abilities. In China, EVOH products (EW-3201 and EW-3801) produced by Sinopec are highly recognized.     EVOH also stands out from other plastics because it’s resistant to chemicals and high temperatures, plus it’s clear.  It's easy to work with, too, so it can be used in multilayer packaging without complicated processes, making it both practical and afford.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com      

🔬 At a molar fraction of 5% vinyl acetate, the mechanical properties of EVA (ethylene vinyl acetate copolymers) become very similar to those of soft PVC.EVA is flexible in its own right, which gives it a number of advantages, such as the disadvantage of avoiding the migration of plasticizers, which is the main reason for the gradual replacement of PVC.     💪 These copolymers have a higher modulus and better processing properties than typical elastomers and do not require vulcanization considerations. Polyvinyl alcohol (PVA 088-50 & PVA 2488) can be obtained by hydrolysis of polyvinyl acetate. Poly(vinyl alcohol) is an atactic cubic polymer but does not disrupt the lattice structure due to the small hydroxyl groups. Therefore, ester bases that are not sufficiently hydrolyzed reduce crystallinity and the number of intermolecular hydrogen bonds.   💧 Highly hydrolyzed poly(vinyl acetate) (containing fewer unhydrolyzed ester groups) has a higher crystallinity. As the degree of hydrolysis increases, the molecules become easily crystallized. If these molecules are not sufficiently dispersed before dissolution, hydrogen bonding will cause them to associate with each other. In order to achieve hydrolysis levels above 98%, manufacturers need to operate at a low temperature of 96°C to ensure that the larger molecules have sufficient thermal energy to dissolve.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

Polyvinyl Butyral Resin (PVB) resin, a versatile and highly adaptable material, has found its way into a myriad of applications across various industries. Its unique properties, such as transparency, durability, and adhesion, make it an indispensable component in modern manufacturing and technology.   PVB resin is widely used as an interlayer material in the production of safety glass. This type of glass boasts exceptional transparency and high impact resistance, making it ideal for applications in the aerospace and automotive sectors. Whether it’s for airplane windows or car windshields, PVB resin-based safety glass ensures both clarity and durability, providing an extra layer of protection in high-stakes environments.   In the realm of protective coatings, PVB resin plays a crucial role in manufacturing anti-corrosion and anti-rust paints. These coatings are known for their strong adhesion, excellent water resistance, and ability to withstand harsh weather conditions. Additionally, PVB resin is used to create metal primers and cold-resistant paints, ensuring that structures and machinery remain intact and functional even in extreme environments.   PVB resin is a key ingredient in the production of vibrant decorative films, which can serve as an alternative to traditional ceramic decals. These films are not only visually appealing but also highly durable. In the PVB resin industry, it is also used to create molding compounds that can replace metals like steel and lead. Furthermore, PVB resin-based adhesives are widely employed for bonding materials such as wood, ceramics, metals, plastics, leather, and laminated composites, showcasing its versatility.   The textile industry benefits from PVB resin in the form of fabric treatment agents and yarn tubes, which enhance the quality and durability of textiles. In the food industry, PVB resin is used to produce non-toxic packaging materials, ensuring the safety and integrity of food products. Its non-toxic nature makes it an ideal choice for packaging sensitive items like tea and cigarettes, where odor retention is a concern.   In the paper industry, PVB resin is utilized as a paper treatment agent, improving the strength and quality of paper products. Additionally, it is used to create anti-shrinkage agents, stiffening agents, and other waterproof materials, further expanding its utility in industrial applications.   PVB resin’s solubility in alcohols and non-toxic nature make it a preferred choice in the printing industry. It is compatible with various printing techniques, including flexography, gravure, letterpress, screen printing, and heat transfer printing. Its ability to produce odor-free prints makes it suitable for packaging sensitive items like tea and cigarettes. Moreover, its cationic properties allow it to adhere strongly to glass surfaces, making it particularly effective for glass decoration through screen printing.   From enhancing the safety of vehicles and aircraft to revolutionizing the printing and packaging industries, PVB (Butvar B-76 & B-03HX) has proven to be a material of immense value. Its adaptability, combined with its eco-friendly and non-toxic characteristics, ensures that it will continue to play a pivotal role in shaping the future of technology and industry. As research and innovation progress, we can only expect to see even more groundbreaking applications of this remarkable material.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

In recent years, with the accelerated pace of urbanization in my country and the continuous growth of automobile sales, there has been a strong demand for PVB laminated glass. At the same time, with the development of technology, Polyvinyl Butyral Resin (PVB) Film has been researched and developed, and the application market has been further developed. In this development process, we must not only pay attention to new technological innovation, but also overcome the technical difficulties in the process of PVB waste collection and recycling, so as to achieve the environmental friendliness and maximize the economic benefits of the PVB industry. At present, the recycling of PVB resin mainly includes physical recycling method, chemical recycling method and energy recovery method.     Physical recycling is to put the discarded PVB through a series of physical treatment processes, such as separation, purification, cleaning, etc., and at the same time, add certain additives as required for reuse. This method can effectively utilize PVB materials and greatly reduce environmental pollution. For example, the PVB solid waste and scraps discarded in the market are recycled, and after sorting, cleaning, drying, and crushing processes, plasticizers, tougheners, three-salt stabilizers and other additives are added, and waterproof membranes for construction are produced through high-speed mixing, mastication, tableting and other processes. Through experimental research, it has been found that the waterproof membrane has good mechanical properties, convenient processing, and a wide operating temperature range, and has broad market prospects in the construction field.   The chemical recycling method uses light, heat, radiation, and chemical reagents to degrade PVB polymer into low-molecular single or hydrocarbon substances. At the same time, the cracked raw materials can be reused. Common cracking methods include hydrolysis, alcoholysis, thermal cracking, hydrocracking, catalytic cracking, etc. However, the current technology of this deep chemical recovery method is not very mature, the technology cost is high, and the economic benefits are low. Currently, the most commonly used method is to process waste PVB to obtain pure polymer resins and additives. Supercritical separation technology is used to separate the additives and resin in colorless PVB.   Energy recovery is the process of extracting energy from waste plastic, typically used as fuel or to generate steam to generate electricity. Because PVB (PVB B-03TX& PVB B-03HX) polymer contains a large amount of hydrocarbons, it is flammable. Although the energy recovery method is one of the methods for recycling PVB waste, it is not commonly used due to its high cost.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

Polyvinyl Alcohol (PVA) is a versatile polymer with diverse applications in various industries. Its unique properties, such as high tensile strength, good film-forming abilities, and excellent water solubility, make it highly sought after in the market.     The market for Polyvinyl Alcohol has grown significantly in recent years, thanks to its wide range of applications. The demand for PVA is driven by its use in sectors such as adhesives, textiles, paper, packaging, construction, and pharmaceuticals. The global market for Polyvinyl Alcohol is expected to witness steady growth due to the increasing adoption of eco-friendly and sustainable materials in various industries.   Polyvinyl Alcohol is widely used as a binder in adhesive formulations due to its excellent adhesion properties. Its application in industries such as woodworking, packaging, and labels presents significant growth opportunities. The more commonly used grades are 2488, 0588, 2688, and etc.   When it comes to the textile industry for various purposes, including sizing agents, warp yarn lubricants, and fiber modification. The increasing demand for eco-friendly textile materials and the growing emphasis on sustainable production methods provide ample opportunities for PVA in this sector. Especially in some developing countries where the textile industry is prevalent. The annual demand for PVA 1788 is extremely huge.   With its strong binding capabilities, PVA is extensively used in the paper industry. It enhances the strength and quality of paper products, leading to improved printability and durability. The rising demand for high-performance paper products and the emphasis on recyclability drive the market for PVA in this sector.   The development of flexible packaging materials has gained traction in recent years. PVA-based films and coatings offer excellent barrier properties, making them suitable for food packaging and other sensitive products. The growing demand for sustainable and recyclable packaging solutions presents opportunities for PVA-based materials. PVA water-soluble film is also widely used in demoulding and construction industries.   The future of Polyvinyl Alcohol looks promising. As industries continue to prioritize sustainability and environmental concerns, PVA's biodegradability and non-toxic nature make it an attractive choice. Additionally, ongoing research and development efforts aim to enhance the properties and expand the application scope of PVA, opening doors for novel uses in areas such as biomedicine, food, cosmetics, and 3D printing.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com JiangSu 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 butyral (PVB) is a highly versatile and widely used polymer in various industries. It finds extensive application in the automotive, architecture, and photovoltaic industries, among others.   In the automotive sector, PVB is used as an interlayer PVB films in laminated glass, providing enhanced safety and sound insulation. In the architectural field, PVB is utilized in safety glass, offering protection against impact, UV radiation, and break-ins. Additionally, the photovoltaic industry employs PVB as a critical component in solar cell encapsulation, ensuring durability and efficient energy conversion.     The PVB (Butvar B-74 & B-04HX) market has witnessed substantial growth in recent years, driven by increasing demand for safety and energy-efficient solutions across industries. In the automotive sector, stringent safety regulations and rising consumer awareness have boosted the adoption of laminated glass, thereby driving the demand for PVB. Similarly, the growing emphasis on sustainable construction practices has fueled the demand for PVB in the architectural industry, where energy-efficient glazing solutions are sought after.   Moreover, the expanding solar energy sector has presented opportunities for PVB in photovoltaic applications. The advancements in solar cell technology and the shift towards renewable energy sources have increased the demand for PVB as a reliable encapsulation material.   The future of the PVB market looks promising, with several factors contributing to its growth. The increasing focus on safety and environmental sustainability will continue to drive demand for PVB in automotive and architectural applications. The growing urbanization and infrastructure development across regions also present significant opportunities for the PVB market.   Furthermore, advancements in PVB technology, such as the development of new formulations and improved performance characteristics, are expected to expand the scope of PVB applications. Manufacturers are investing in research and development to enhance the properties of PVB, including its optical clarity, adhesion, and resistance to yellowing over time.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

The full name of PVB is polyvinyl butyral, or PVB resin for short. It contains a lot of hydroxyl (OH) groups, which can produce bridging reactions with some thermosetting resins to improve chemical resistance and coating film hardness. PVB molecules contain long branched chains and have good flexibility, excellent transparency, strong adhesion, good light resistance, heat resistance, cold resistance, water resistance, film-forming properties, solubility, miscibility, high tensile strength and impact resistance, etc. It is widely used in the fields of manufacturing laminated safety glass, coatings, adhesives, ceramic film decals, vacuum aluminum foil paper, electrical materials, fiberglass products, fabric treatment agents and engineering plastics. It is a synthetic resin material with broad development and utilization prospects. There are three main synthesis methods for producing PVB(such as Butvar B-98 & PVB WWW-A-20) in the industry: one-step method, dissolution method and precipitation method. The following will introduce these three process methods and their advantages and disadvantages in the production process one by one.   The one-step method refers to a generation process in which the hydrolysis of polyvinyl acetate (PVAC) and the acetal reaction of the generated PVB are carried out simultaneously. It is represented by the production process of Solutia Company (the chemical division of Monsanto Company was split to form Solutia Company, which has now been acquired by Eastman Company). Vinyl acetate is bulk polymerized to form a methanol solution of polyvinyl acetate, and HCI is added for alcoholysis. The PVA generated by alcoholysis is suspended in a mixed solvent of ethanol and ethyl acetate, and butyraldehyde and HCI are added for acetal reaction. At the reflux temperature, react for 8 to 10 hours. As the reaction proceeds,  Polyvinyl Alcohol (PVA) is completely dissolved and a uniform PVB solution is finally formed. Then add alkali to adjust the pH to 6. After reaching the specified acetal rate, it precipitates in water. After washing, neutralizing and drying, the finished PVB product can be obtained.   The dissolution method is to make PVA into a methanol suspension, add HCI and butyraldehyde to perform a condensation reaction. As the reaction proceeds, PVA gradually dissolves to form a uniform solution. After reaching the specified acetal ratio, it precipitates in water. After washing, neutralizing and drying, the finished PVB product can be obtained. The acetal rate of the PVB resin produced by this method can reach more than 86%, and the condensation distribution is uniform.   The precipitation method requires first dissolving PVA in water (85-90°C), then filtering the solution, pressing it into an acetal kettle, adding hydrochloric acid and butyraldehyde, and adding butyraldehyde in two batches to start homogeneous condensation. When the reaction reaches a certain level, PVB particles are precipitated from the solution and suspended in the mother liquor, which is a heterogeneous condensation reaction. When the condensation is completed, the material is put into a water washing kettle, washed with water, and alkali is added for stabilization, then filtered and dried to obtain powdered PVB.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com