EVAL C109B

In modern industry, especially in the food, medical, and cosmetic packaging sectors, the requirements for material performance are becoming increasingly stringent. High-barrier materials are crucial for ensuring product quality, extending shelf life, and reducing waste. Ethylene-VinylAlcohol Copolymer is seen as a great green packaging material because it blocks gases, smells, and solvents so well. It also possesses good processability, transparency, mechanical strength, abrasion resistance, and cold resistance.     EVOH is a type of thermoplastic resin made from ethylene and vinyl alcohol. A key feature is the many hydroxyl groups (-OH) in its structure. These groups create strong hydrogen bonds, which limit how well gas molecules, like oxygen, can pass through it. This gives EVOH very good barrier properties. It blocks oxygen much better than common polymers like polyethylene (PE) or polypropylene (PP). In fact, EVOH can be thousands of times better at blocking oxygen.   1.  EVOH EW-3201: Specifications Overview Items Specifications Appearance White transparent particle Melting index (190℃,2160g/10min) 1.5-2.5 Chroma ≤20 Volatile content(%) ≤0.3 Ethylene(mol%) 30.0-34.0 Density (g/cm3) 1.10-1.20   2. In-depth Analysis of Key Physical Properties 2.1 Superior Gas Barrier Performance The core advantage of EW-3201 lies in its ethylene content, ranging from 30.0 to 34.0 mol%. For EVOH (Extracorporeal Membrane Oxide), ethylene content is a crucial parameter: Lower ethylene content: More hydroxyl groups (-OH) on the polymer chain, stronger hydrogen bond network, and better oxygen barrier performance. Higher ethylene content: Better polymer thermal processability (melt index, flexibility), and improved water resistance, but slightly reduced barrier performance. EW-3201's 30.0-34.0 mol% ethylene content provides a good thermal processing window while ensuring extremely high oxygen barrier performance. This method is appropriate for packing food items needing strict preservation (like meats, sauces, and milk products) and medical tools needing high levels of cleanliness, which extends how long they can be stored. 2.2 Ideal Processing Performance The melt index (MI) of EW-3201 is 1.5-2.5 g/10 min, which is a relatively moderate range. Moderate MI: This indicates that its melt viscosity is moderate and its flowability is good, making it suitable for high-speed, complex co-extrusion or lamination processes without excessive degradation during processing. Importance in Co-extrusion: EVOH is typically used in thin layers sandwiched between structural layers such as PE, PP, or PET. The MI value helps EW-3201 match well with typical adhesives and outer layers. This makes for good mixing of multilayer structures and strong sticking between layers. 2.3 High Density and High Transparency EVOH typically has a high density (1.10-1.20 g/cm³), attributed to its highly ordered molecular structure and strong hydrogen bonds. High density is the structural basis for achieving high gas barrier properties. Meanwhile, a colorimetric index below 20 ensures that films or containers made from EW-3201 possess excellent transparency and gloss, crucial performance for packaging that needs to display contents (such as high-end food and cosmetics). 2.4. Environmental Sensitivity  It's important to note that the barrier properties of EVOH are sensitive to environmental humidity. Because the hydroxyl groups on the molecular chain are hydrophilic, when environmental humidity (RH) increases, water molecules enter the hydrogen bond network, weakening hydrogen bonding and leading to increased oxygen permeability.  Application Solution: EW-3201 is commonly paired with thermoplastics like PE, PP, and PET in real-world uses. This is done through co-extrusion or lamination to create a multilayer structure. The EVOH layer is placed between polyolefin layers that have good moisture resistance. This effectively protects the EVOH layer from moisture, allowing it to maintain excellent barrier performance even in high-humidity environments.   3. Main Applications Food Packaging: Used in the production of oxygen barrier films, cling film, aseptic packaging, tubing, and bag-in-bag systems, significantly extending the shelf life of dairy products, jams, meat, seafood, coffee, and tea. Medical Supplies: Used for aseptic packaging of infusion bags and medical devices, preventing product oxidation and microbial contamination. Industry and Agriculture: Used as an oxygen barrier layer for underfloor heating pipes to prevent pipe corrosion; or for solvent-resistant containers for solvents and chemicals. Cosmetic Packaging: Used in the production of multi-layer cosmetic tubing and containers, effectively preventing the oxidation or volatilization of fragrances, vitamins, and other active ingredients.   As the packaging industry needs thinner, more efficient, and greener materials, good ethylene vinyl alcohol (EVOH) products such as EW-3201 (EVASIN EV-4405F) will keep being very important and will push forward barrier packaging tech improvements around the world. Choosing EW-3201 means choosing a high-performance, highly reliable, and sustainable packaging future.   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    

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      

If you’ve ever wondered how a pre-made meal stays fresh on a store shelf without preservatives, how high-tech pharmaceuticals retain their exact potency, or why your favorite sunscreen doesn't degrade over time, the secret almost always lies within the unseen layers of high-performance packaging. Enter EVAL EVOH (Ethylene Vinyl Alcohol copolymer). While standard plastics like polyethylene or polypropylene provide structural strength and moisture defense, EVOH serves as the ultimate defender against oxygen and ambient degradation. Here is how this high-barrier resin is quietly transforming three critical industries: food, healthcare, and personal care.   1. Applications in Food Packaging Systems Oxygen exposure causes lipid oxidation, nutritional degradation, and color loss in processed and fresh foods. EVAL resin (EVAL F101A) provides a high-density barrier against oxygen transmission, enabling non-preservative preservation strategies and extended shelf life. Key Performance Advantages Gas & Oxygen Barrier: Blocks atmospheric oxygen entering the package and maintains precise gas concentrations within Modified Atmosphere Packaging (MAP). Volatile & Aroma Retention: Prevents the loss of delicate flavor compounds and volatile aromatics. Thermal & Chemical Stability: Suitable for thermal processing techniques, including retort sterilization, hot-filling, and aseptic processing (UHT). Contaminant Mitigation: Serves as a functional barrier against mineral oil hydrocarbons (MOSH/MOAH) migrating from recycled paperboard. Environmental & Operational Efficiency: Achieves high barrier performance at minimal layer thicknesses, aiding packaging lightweighting and reducing transport emissions. The material is halogen-free and metal-free, ensuring full compatibility with inline metal detection systems. Structural Configurations by Application Flexible Films (Meats, Seafood, Prepared Foods): Multi-layer laminates such as PA / EVAL / PA / tie / PE or PET / PE / tie / EVAL / tie / EVA maintain physical integrity and gas retention. Rigid Trays & Thermoformed Containers (Retort Meals, Baby Food): Co-extruded structures like PP / regrind / tie / EVAL / tie / PP provide thermal resistance and room-temperature storage stability. Blow-Molded Bottles & Tubes (Condiments, Dairy): Structures including PE / tie / EVAL / tie / PE preserve liquid products against oxidation and discoloration without requiring heavy metal barriers.   2. Applications in Pharmaceutical and Medical Packaging Medical products require strict compliance with global safety standards alongside absolute barrier integrity. EVAL resin (EVAL C109B) provide an aluminum-free, halogen-free alternative that meets United States Pharmacopeia (USP Class VI) and U.S. FDA food contact regulations. Key Performance Advantages High-Level Oxidation Defense: Protects sensitive active pharmaceutical ingredients (APIs) from oxidative chemical degradation. Non-Absorptive Layer Integrity: When used as an inner contact layer in pouches or sachets, it prevents the absorption or migration of active drug components into the packaging matrix. Safeguarded Incineration: Polyolefin structures incorporating EVAL (EVAL EV-4405F) generate no hazardous halide compounds upon incineration. Primary Application Formats Blister Packaging: Combined with Cyclic Olefin Copolymer (COC) to deliver simultaneous oxygen and moisture vapor protection for solid oral dosage forms. Flexible Parenteral & Dialysis Bags: Provides ultra-clear, flexible, and sterilizable containment for IV fluids, biopharmaceutical solutions, and medical irrigation fluids. Ophthalmic & Inhalation Containers: Secures volatile liquid formulations in eye drop bottles, ampoules, and respiratory delivery systems.   3. Applications in Personal Care and Cosmetics Modern cosmetic formulations increasingly utilize natural active ingredients and reduced preservative systems. These sensitive formulations require packaging materials with high chemical resistance and gas containment to preserve product efficacy. Key Performance Advantages Active Ingredient Stability: Shields oxygen-sensitive compounds—such as Vitamin C, UV filters in sunscreens, and oxidation dyes—from losing functionality. Chemical Resistance: Resists degradation or cracking when exposed to aggressive oils, solvents, and surfactants. Flex-Crack Resistance: Maintains structural barrier performance during repeated deformation, such as squeezing flexible tubes. Primary Application Formats Squeezable Tubes & Bottles: Multi-layer structures like PE / regrind / tie / EVAL /tie / regrind /PE prevent air back-drafting and maintain structural memory while protecting hand creams, lotions, and toothpastes. Flexible Sachets & Wet Wipe Packaging: Laminates like PET / PE / tie / EVAL / tie / PE prevent the evaporation of essential oils, fragrance agents, and active disinfectants.   EVAL EVOH resin is a versatile material choice for multi-layer barrier packaging. By delivering maximum gas barrier performance within thin structural layers, it enables manufacturers in the food, pharmaceutical, and personal care sectors to enhance product stability, ensure safety compliance, and advance sustainable packaging initiatives.   Website: www.elephchem.com whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com