The Rise of High-Barrier Plastic Packaging Films in China: Market Trends, Materi

Jul 30, 2025

Introduction

China's packaging industry has undergone a significant transformation in recent years. Driven by increasing consumer demand for food safety, freshness, and convenience, the development of high-barrier, multifunctional plastic films has become a key focus area. In particular, multilayer co-extruded films and advanced composite materials are shaping the future of food packaging in China.

1. Current State of Plastic Film Production in China

Plastic films represent approximately 40% of total plastic products in China, making them the fastest-growing segment of the plastics industry. With over 2,240 manufacturers, including 65 companies producing more than 5,000 tons annually, and several exceeding 50,000 tons, the industry is scaling rapidly.

Key resins include polyethylene (PE), polypropylene (PP), and polyester (PET). Processing methods such as blown film extrusion, biaxial stretching, and cast film extrusion dominate the market.

• BOPP (biaxially oriented polypropylene): 180 lines, 2.44 million tons capacity, growing over 15% annually.
• CPP (cast polypropylene): 190 lines, 500,000 tons capacity.
• BOPET (biaxially oriented polyester): Surged past 650,000 tons by 2008.
• BOPA (biaxially oriented polyamide): 13 companies operate 18 lines, producing 74,800 tons annually.

2. High-Barrier Plastic Packaging Materials

High-barrier materials are essential for extending the shelf life and preserving the quality of food and pharmaceuticals. Demand continues to grow as convenience and hygiene gain prominence among consumers.

2.1 Key Requirements for Food Packaging Films

Food packaging must ensure:

• Oxygen barrier: Prevents oxidation of fats and proteins.
• Moisture barrier: Preserves dry goods.
• Odor barrier: Maintains aroma and blocks external odors.

Barrier Performance Benchmarks:

• OTR (Oxygen Transmission Rate): ≤ 0.1 for high-barrier films (e.g., EVOH, PVDC).
• WVTR (Water Vapor Transmission Rate): ≤ 0.03 g/m²·24h considered high-barrier.

Additional requirements: Sealability, heat resistance, mechanical strength, and printability.

2.2 Common Barrier Materials

Material	Advantages	Limitations
EVOH	Excellent oxygen barrier, recyclable, transparent	Poor performance >50% RH, relatively costly
PA (Nylon)	Strong mechanical properties	Moisture absorption reduces barrier effect
PVDC	Excellent oxygen and moisture barrier	Environmental concerns, non-recyclable
PEN	Superior gas barrier, UV resistance	High cost
Aluminum Foil	Best overall barrier, heat resistance	Opaque, non-microwavable, costly
SiOx/AlOx	Transparent, ultra-high barrier	Expensive, technically complex
Modified PVA	Low-cost, excellent barrier	Needs protective layers

3. High-Barrier Film Manufacturing Technologies

High-barrier films are rarely made from pure barrier resins due to cost and process limitations. The industry now favors multilayer composite structures using four main production techniques:

3.1 Dry Lamination

• Adhesives applied to PE, PP, PET, PA films.
• Strong adhesion, suitable for high-speed production.
• Higher material and processing costs.

3.2 Coating Lamination

• Ideal for resins like PVDC, PVA.
• Applied as coatings onto substrates like BOPP or PET.
• Adds barrier properties without compromising flexibility.

3.3 Co-Extrusion Lamination

• Most widely used for high-barrier films.
• Multilayer structures (e.g., PE/TIE/EVOH/TIE/PE).
• Enables thinner films, lower cost, diverse applications.
• Can be processed by blown or cast film extrusion.
• Modern lines reach 1,000 kg/h output, thicknesses 7–25 μm.

3.4 Vapor Deposition Lamination

• Deposits aluminum or SiOx under vacuum onto films.
• Achieves transparency and ultra-high barrier.
• Costly and technologically demanding.

4. Material Selection for Food Applications

Food type, processing method, storage conditions, and resin properties dictate the selection of high-barrier films.

Material	Best Use Cases
PVDC-based films	High-moisture foods like meats and sausages (80–120°C sterilization)
EVOH-based films	Dairy, tofu, jerky, sauces, MAP/aseptic packaging
MXD6 (Nylon)	Retort pouches, oil-rich foods like ham and cheese
SiOx/AlOx coatings	Transparent packaging for microwaveable or retort foods
Aluminum laminate	Long shelf-life meats, tea, spices

Conclusion

China's high-barrier plastic packaging film industry is evolving rapidly, driven by advances in materials science, manufacturing technology, and consumer demands. With an increasing focus on sustainable, multifunctional, and high-performance packaging, high-barrier films are becoming essential in securing food safety, extending shelf life, and enhancing user experience.

As the industry continues to mature, we can expect greater innovation in recyclable and biodegradable barrier materials, positioning China at the forefront of the global flexible packaging market.