SK EVOH EV 4405F Overview for High-Humidity Barrier Packaging

Ethylene-Vinyl Alcohol Copolymer EVOH EV 4405F

In packaging applications such as food and pharmaceuticals, where gas barrier requirements are extremely high, ‘high humidity penetration’ is always a difficult problem to overcome. The performance of many traditional barrier materials deteriorates significantly when humidity rises, leading to increased risk of freshness failure and drug spoilage. How to select barrier materials that balance processing performance and humidity stability has become the focus of attention for many brand owners and processing manufacturers.

Optimised for multilayer co-extrusion, this EVOH EV 4405F copolymer pellet developed by SK Global Chemical has good processability and humidity stability, making it suitable for packaging applications that need to maintain barrier properties in high humidity environments. It not only excels in performance parameters, but also demonstrates stability and efficiency in actual processing.

EVOH EV 4405F Highlights

1. It has a high humidity tolerance and still provides reliable oxygen barrier

Even at a relative humidity of 85%, the oxygen transmission rate is only 3.4 cm³·20μm/m²·24hr·atm, which is far more stable than similar materials and suitable for refrigeration, cold chain and high-humidity circulation scenarios.

2. Excellent mechanical support to enhance the rigidity of the finished product

EVOH EV 4405F has a tensile modulus of 3660 MPa and a flexural modulus of 3340 MPa, which help packaging films achieve thinning and cost reduction while maintaining excellent barrier performance. This significantly enhances the mechanical stability of the overall packaging structure.

3. Wide Processing Window and Excellent Compatibility

EV 4405F has a melt index of 5.5 g/10min (tested at 190°C, 2.16kg), making it well-suited for mainstream extrusion equipment. It performs stably across multiple processing techniques such as blown film, casting, and thermoforming, and can be effectively combined with PE, PA, or PP substrates in multi-layer composite films.

4. Strong thermal stability, reducing processing defects

Softening point of 156°C, melting point of 165°C, with good high temperature resistance, reducing the risk of warping and poor fusion welding caused by thermal fluctuations during the moulding process.

Application Scenario Driven Choice - Core Value of EV 4405F

1. Cold Chain Food Packaging: Stable Oxygen Barrier under High Humidity to Extend Freshness Preservation Cycle

EVOH EV 4405F has an oxygen permeability of 3.4 (cm³-20μm/m²-24hr-atm) at 85% RH and 20°C, which is significantly better than traditional barrier materials. Traditional barrier materials, can effectively inhibit the entry of oxygen into the package, thus delaying the oxidation reaction of highly sensitive foods such as meat and cheese.

2. Pharmaceutical Packaging: Precise Protection of Active Ingredients

For pharmaceutical preparations that need to maintain activity or avoid light and oxygen, such as nutritional solutions, injection bottle covers, EV 4405F provides an additional layer of protection for the storage and transportation of drugs with its stable barrier properties and good film-forming properties.

3. Industrial and Electronic Component Packaging: Oxygen and Moisture Resistance to Enhance the Storage Life of Components

When packaging precision components (e.g. sensors, chips) under high humidity conditions, the water vapour permeability of EVOH EV 4405F is only 19 (unit: g/m²-day), which, together with its high Vicat Softening Temperature (156°C), makes it suitable for industrial protective film structures that require heat sealing or thermoforming treatments.

Ethylene Vinyl Alcohol EVOH EV 4405F Datasheet

Click here to download TDS for EVOH EV 4405F

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1.Our Service Advantages

    Ⅰ.Professional material selection advice to match you with the best material solutions
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Note: We can also provide supply services for other EVOH grades and a variety of plastic raw materials, welcome to inquire!

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