EVOH EW-3201

EVASIN EVOH resin is an ethylene-vinyl alcohol copolymer, used to manufacture films, sheets, and packaging containers with high oxygen barrier properties. The EVASIN series offers various grades of composition and rheological properties suitable for various processing techniques, such as multilayer co-extrusion, casting, blow molding, sheet molding, blow molding, biaxial stretching, injection molding, and extrusion molding. The ethylene content of EVASIN EVOH resin is related to its barrier properties; lower ethylene content results in higher oxygen barrier properties, and higher barrier properties lead to higher resin hardness. EVASIN EVOH (EVOH EW-3201) has excellent gas barrier properties, blocking various odors from seasonings, spices, cosmetics, etc., making it suitable for food packaging. It also exhibits excellent oil resistance and barrier properties against oils and chemical solvents, thus finding applications in automotive fuel tanks, pesticide bottles, and underfloor heating pipes. Characteristics: Excellent gas barrier properties, affected by humidity Good printability Oil resistance Solvent resistance Weather resistance High transparency High rigidity Excellent flexibility Good antistatic properties Moisture retention Good surface gloss   EVASINT EVOH Naming Principles: The letters E and V represent EVOH. The third and fourth digits represent the ethylene content: for example, 32 represents 32% ethylene content; 38 represents 38% ethylene content; 44 represents 44% ethylene content. The fifth and sixth digits are related to fat melting: 01 represents fat melting of 1-2 G/min, 51 represents a new specification with unchanged fat melting (190℃, 2160 G). The letter V represents: no processing aids added. The letter F represents: compounding processing aids added. EVOH has excellent barrier properties against gases such as oxygen, nitrogen, and carbon dioxide, but due to its hydrophilic groups, it has poor barrier properties against water vapor. Therefore, when considering barrier properties against all gases, EVOH is generally used as an intermediate layer in co-extrusion molding with traditional hydrophobic thermoplastics.     EVASIN EV-4405F is mainly used in the following fields: Packaging: Food Packaging: It is used as an intermediate barrier layer in composite films for aseptic packaging, hot cans, and retort pouches, packaging dairy products, meat, canned juice, and condiments. It effectively prevents oxygen and moisture from entering the packaging, extending the shelf life of food and maintaining its flavor and quality. For example, in milk powder packaging, it prevents the milk powder from getting damp and oxidizing, ensuring that the nutritional components of the milk powder are not destroyed. Non-food packaging: Used for packaging solvents, chemicals, air conditioning structural components, gasoline drum liners, electronic components, etc. Due to its excellent barrier properties, it can prevent solvent evaporation, chemical leakage, and protect electronic components from external environmental influences. Automotive industry: Due to its good oil resistance and barrier properties, it can be used as a barrier layer material for automobile fuel tanks, effectively preventing fuel evaporation and leakage, reducing environmental pollution, and improving vehicle safety and fuel efficiency. Other fields: It can be used to produce packaging materials for household goods, underfloor heating pipes, wallpaper, etc. In household goods packaging, it provides good protection and barrier properties; in underfloor heating pipes, it helps improve the pipes' corrosion resistance and oxygen barrier properties, extending the pipes' service life; in wallpaper, it can enhance the wallpaper's performance, such as waterproofing, moisture resistance, and odor blocking.   Website: www.elephchem.com whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

SoarnoL DC3203RB combines the high gas barrier properties, oil resistance, and transparency of ethylene alcohol with the moisture resistance and melt extrusion processability of ethylene. Furthermore, since Soarnol is composed only of carbon, oxygen, and hydrogen, it does not produce toxic gases when burned, and the heat generated during combustion is only half that of polyethylene, making it a low-load raw material.     SoarnoL DC3203RB (EVOH EW-3201) Performance Characteristics: Excellent Gas Barrier Properties: It provides excellent barrier properties against gases such as oxygen and carbon dioxide, effectively preventing food and pharmaceuticals from spoiling or developing off-flavors due to oxygen penetration, thus extending the product's shelf life. For example, in food packaging, packaging containing this material can extend the shelf life and aroma retention of food by months or even years without the addition of preservatives. Excellent processing performance: Combining the processability of ethylene polymers with the barrier properties of vinyl alcohol polymers, it can be thermoformed using traditional polyolefin processing equipment, such as extrusion, blow molding, and injection molding, easily producing various packaging containers, films, and other products. Excellent oil and organic solvent resistance: Exhibits strong stability when in contact with oils and various organic solvents, with minimal weight gain and is not easily dissolved or swollen, making it suitable for packaging oily foods, cosmetics, pharmaceuticals, and products containing chemical solvents. High mechanical strength and good abrasion resistance: Possesses high tensile strength, flexural strength, and impact strength, along with high surface hardness and good abrasion resistance. Packaging materials made from this material are not easily damaged during transportation, storage, and use, protecting the integrity of the contents. Good transparency and gloss: Film products have high gloss and low haze, and are highly transparent, allowing the product inside the packaging to be clearly seen, enhancing the product's display effect and attracting consumers. Good thermal stability: It is one of the most thermally stable resins among all commercially available strong barrier resins. Waste generated during processing can be recycled and reused, reducing production costs and meeting environmental protection requirements. Meets environmental protection requirements: It is non-toxic and odorless, and will not produce harmful substances upon direct contact with food, medicine, etc., making it safe for human health and the environment. Furthermore, multi-layer packaging materials containing Soarnol EVOH (Ethylene-VinylAlcohol Copolymer) can be recycled under certain conditions, helping to reduce waste pollution.     When used as a high-barrier material, EVOH is typically employed in a multi-layer composite structure. Typical structures include: Low-density polyethylene/ethylene-vinyl alcohol copolymer/low-density polyethylene PP/AD/EVOH/AD/LDPE PP/PA/EVOH/PA/AD/PE PE/AD/PA/EVOH/PA/AD/PE PA/EVOH/PA/AD/PE   In these structures, AD represents the adhesive. The multi-layer composite structure fully utilizes the properties of each material, improving the water resistance of EVOH and resulting in a high-barrier material with excellent overall performance. Most of the above structures are used in flexible packaging. Composite resins such as PP, PE, and PA, due to their good toughness but poor rigidity, are difficult to cut, limiting their application in rigid packaging, especially in online filling products. Impact-resistant high-barrier polystyrene (HIPS) possesses good rigidity, excellent molding performance, and is easy to punch, making it suitable for rigid packaging materials.   However, due to the poor compatibility between EVOH resin and HIPS resin, and the significant difference in their rheological rates, key issues affecting the performance and use of the composite material include the adhesion strength between the substrate and EVOH, the tensile properties of EVOH during secondary molding, and the uniformity of EVOH layer distribution during calendering of composite sheets. These are also challenges that need to be addressed in the production of this type of composite material. Domestic production has been difficult, necessitating imports, which significantly restricts cost and delivery time. Therefore, the development of high-barrier EVOH composite materials suitable for rigid packaging, especially for online filling, is particularly urgent.   Website: www.elephchem.com whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

In the vast plastics industry, the choice of polymer is crucial in determining the performance and cost of the final product. This discussion will compare two kinds of polypropylene, Braskem Polypropylene RP 225M and ADMER QB520E, which are suited for different jobs. RP 225M, a medium-flow random copolymer, sees use in film applications because of its good optical clarity and slip. QB520E, on the other hand, is a unique maleic anhydride-grafted homopolymer PP-based adhesive resin focused on adhesive applications in multilayer structures. If you're looking for the right material for flexible packaging, textile applications, or composite structures, this comparison guide will provide clear insights to help you make an informed choice.   1. Core Performance Comparison: RP 225M vs QB520E 1.1 Flowability and Density Features Braskem RP 225M ADMER QB520E Emphasis/Differences Mel Flow Rate (MFR) 8.0 g/10 min 1.8g/10min RP 225M has higher flowability, suitable for thin-walled or high-speed extrusion processes (such as films); QB520E has lower flowability, which is beneficial for improving melt strength and adhesion. Density 0.902g/cm3 0.90g/cm3 Both have very similar densities, falling within the typical polypropylene density range. 1.2 Mechanical Strength and Rigidity Features Braskem RP 225M ADMER QB520E Emphasis/Differences Tensile Yield Strength 28 MPa 24 MPa RP 225M has a slight edge in tensile strength, which may provide better load-bearing capacity in single-layer flexible packaging. Flexural Modulus 900 MPa N/A / Cantilever Impact Strength 30 J/m 470 J/m2 QB520E exhibits extremely high impact strength, consistent with its application as an adhesive layer in bottles, sheets, etc., where high toughness is required to withstand impacts. Elongation at Break 12%(Yield) 280% (Fracture) QB520E's elongation at break is significantly higher than RP 225M's yield elongation, confirming its high toughness and flexibility, ideal properties for an adhesive resin.   2. In-Depth Application Analysis: Identifying Your Needs 2.1 Braskem RP 225M: Transparency, Sliding, and Heat Sealing RP 225M is a product tailored for single-layer flexible packaging and textile applications. Key Features: Excellent Optical Properties: As a random copolymer, it inherently possesses better transparency and gloss than homopolymers, meeting the demands of high-definition packaging. Excellent Sliding Properties (Low Coefficient of Friction): Contains sliding agents and anti-blocking agents to ensure smooth operation on high-speed packaging machinery, preventing film sticking. Good Heat Sealing Properties: The lower initial heat-sealing temperature (111°C) helps improve packaging efficiency. Suitable Applications: Various flexible packaging films (flat extruded and blown films) 1717, especially for inner or middle packaging requiring high transparency and ease of handling, as well as textile applications. 2.2 ADMER QB520E: The "Glue" for Multilayer Structures QB520E is essentially an adhesive resin designed to solve the problem of direct bonding between different polymer layers. Key Characteristics: Strong Bonding: Utilizing maleic anhydride grafting technology, it can form strong chemical bonds with polar materials (such as EVOH or PA (polyamide)) and non-polar PP substrates, creating a high-barrier, high-strength multilayer structure. High Toughness: Extremely high impact strength (470 J/m²) and elongation at break ensure that the composite material will not delaminate under impact or bending. Processing Stability: Maximum processing temperature up to 300°C provides safety for multilayer co-extrusion. Applications: Primarily used in co-extrusion processes as an adhesive between PP and EVOH/PA barrier layers. Typical products include: Multilayer Barrier Bottles and Sheets: Used for packaging with high barrier requirements, such as for food and cosmetics. Multilayer Blown Films and Pipes: Ensures the integrity and durability of pipe and high-barrier film structures.   3. Production and Safety Considerations 3.1 Processing Recommendations RP 225M: Use planar film extrusion or blown film extrusion processes. High MFR is beneficial for processing. QB520E: Although it has low flowability, it does not require pre-drying, simplifying preparation for multilayer co-extrusion processes. Its melt viscosity-shear rate profile (rheological profile) helps to precisely control layer thickness in co-extrusion. Attention should be paid to the maximum temperature limit (300°C) to avoid decomposition. 3.2 Safety and Regulations RP 225M: Not recommended for packaging or products that come into contact with parenteral solutions or the human body. QB520E: Regarding food contact conditions, its components have relevant compliance statements in the EU and US FDA (as an adhesive), but the manufacturer is responsible for ensuring that the final application complies with all food contact regulations.   4. Summary and Recommendations Your final choice depends on your product structure: If you need to manufacture a single-layer packaging film with good clarity, rigidity, and slip resistance, RP 225M is ideal. If you need to manufacture a multi-layered structure (such as plastic wrap or barrier bottles) that includes a barrier layer (such as Ethylene-VinylAlcohol Copolymer (EVOH) /PA), QB520E is a key material to ensure strong adhesion and high toughness between different layers.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

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

Ethylene-VinylAlcohol Copolymer (EVOH) resin provides a superior barrier against oxygen permeation, exhibiting performance up to four orders of magnitude greater than conventional polyethylene. Due to its excellent barrier properties, formability, and environmental friendliness, it is widely used in high-end new material fields such as automotive fuel tanks, films, food containers, and underfloor heating pipes. When it comes to food packaging, EVOH really helps keep food fresh and flavorful for a long time, sometimes even years, without needing preservatives. EVOH( EW-3201&EVAL F105B)is made bycombining ethylene and vinyl alcohol.     Applications    1.Packaging EVOH is often used with other materials for packaging since it's such a strong barrier: Food & Beverage: It’s used for items like milk, juice, seafood, and other things that spoil quickly. For example, Chinese seafood exporters use five-layer vacuum-sealed films made of PE, EVOH, and PA. Non-Food: You’ll find it in chemicals, cosmetics, pharmaceuticals, and electronics packaging.   2. Automotive Fuel Tanks: EVOH mixed with HDPE makes lightweight and affordable plastic fuel tanks. Structure : Outer layer (HDPE) → Recycled layer → Adhesive layer (LLDPE) → Barrier layer (EVOH) → Adhesive layer (LLDPE) → Inner layer (HDPE). Fuel Lines: PA-EVOH composite tubes replace metal pipes, aiding vehicle lightweighting.       3. Medical Selective Permeable Membranes: Sterilized via radiation (e.g., EVOH hollow fibers for dialysis). Artificial Kidneys: Hollow-fiber membranes for blood purification. Drug Delivery: EVOH-coated polymers for controlled-release medications. Biomedical Implants: Blends with corn starch or cellulose acetate for bone substitutes and tissue repair.   4. Construction Heating Pipes: EVOH’s oxygen barrier prevents corrosion in heating systems. Types: 3-layer (external barrier) and 5-layer (internal barrier) pipes, both using EVOH.   5. Other Uses Textiles: Heat-sealing adhesives with superior wash resistance for apparel. Hydrogen Storage: EVOH-modified hydrogen tank liners maintain elasticity and barrier performance even at low temperatures.   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 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      

EVOH (ethylene-vinyl alcohol copolymer) is a polymer material produced by copolymerization of ethylene and vinyl alcohol. Since the polar hydroxyl groups on the EVOH molecular chain can form hydrogen bonds with water molecules, it can block moisture, while its non-polar vinyl groups can effectively block gases.   EVOH(EVOH EW-3201) has good processing properties and can be blended or compounded with various plastics such as PE, PP, PET, etc. to produce blended or composite materials with excellent performance. It also has good thermal stability and can be processed at high temperatures. It has excellent transparency, which makes the contents of the package clearly visible and easy for consumers to check. It can be completely recycled and reused, and can also be biodegraded to reduce pollution to the environment. Due to its excellent barrier properties and environmental protection, EVOH is widely used in the field of food packaging. For example, it is widely used in vacuum packaging, food cans, beverage bottles and other fields.   EVOH is also widely used in the field of medical packaging, such as pharmaceutical packaging, medical dressing packaging, etc. Its excellent barrier properties can effectively extend the shelf life of drugs and medical dressings. In addition, EV0H is also widely used in the fields of cosmetic packaging, pesticide packaging, etc.   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.