Nylon +EVOH Co-Extruded Film: The All-Rounder in High-Barrier Packaging

In sectors such as food preservation, industrial packaging, and agricultural fermentation, packaging performance directly impacts product quality and cost. In recent years, nylon co-extruded films have emerged as a market favorite due to their multilayer composite structure, outstanding barrier properties, and versatile process adaptability.

Why Is Nylon Co-Extruded Film Known as the "King of High Barrier Packaging"?

(1) Superior Barrier Performance

Nylon (PA), as the core barrier layer, effectively prevents the penetration of oxygen, water vapor, and odors. For example, co-extruded films with a PA/Evoh/PE multilayer structure can reduce aroma loss in food packaging from 5% to just 1%, making them ideal for applications such as fresh meat and ready-to-cook meals where freshness is critical.

(2) Excellent Temperature Resistance

Nylon co-extruded films remain stable across a wide temperature range from -30°C to 120°C, making them especially suitable for frozen food packaging. For instance, using a NY/PE structure prevents brittleness at low temperatures and protects the package from physical damage during transportation.

(3) High Transparency and Visual Monitoring

Seven-layer nylon co-extruded films offer excellent clarity, enabling real-time observation of contents. This is particularly useful in applications such as monitoring the fermentation process of silage without the need to open the package.

(4) Eco-Friendliness and Cost Efficiency

Multilayer co-extrusion eliminates the need for adhesives, resulting in a clean, pollution-free production process and up to 30% cost savings compared to traditional lamination. When paired with recyclable structures, these films align with global sustainability trends.

Structural Innovation: How Does Co-Extrusion Achieve “1+1>2”?

Nylon co-extruded films optimize performance through symmetrical layer-flow structures such as five-layer ABCBA or seven-layer designs:

Outer Layer (Load-Bearing Layer): PP or PE for mechanical strength and abrasion resistance

Middle Layer (Barrier Layer): PA or EVOH polymer to block oxygen and moisture

Inner Layer (Sealant Layer): LDPE or LLDPE to ensure reliable heat sealing

Typical Structure Examples:

Food Packaging: PA/EVOH/PE for barrier + sealing

Leak-Proof Liquids: NY/TPE for puncture resistance + flexibility

Silage Bags: Seven-layer nylon co-extruded film for transparency + heat resistance

Market Outlook: Where Are the New Growth Opportunities?

（1）Food Industry Upgrades

The surge in demand for ready meals, fresh produce, and chilled dairy products is driving the high-barrier film market to grow over 15% annually. Domestic companies like Qicai Chemical have launched MXD6-based specialty nylon co-extruded films, which are certified by clients in Japan and Thailand, with a projected production capacity of 5,000 tons in 2024.

（2）Agriculture and Sustainability

The growing need for silage bags and biodegradable agricultural films is opening new opportunities. Seven-layer nylon co-extruded films are replacing traditional PE bags with their superior visibility and weather resistance.

（3）Industrial Upgrading

In applications such as new energy battery separators and medical packaging, co-extruded films are gaining traction due to their chemical resistance and safety characteristics.

Whether for ultimate freshness in food preservation or cost-effectiveness in industrial packaging, nylon co-extruded films are reshaping the packaging landscape with their triple advantage of performance, processability, and sustainability. Embracing trends such as layer-thinning, functionalization, and recyclability will be key to claiming leadership in the next era of high-performance packaging.