In Which Industries Are Three-layer Co-extruded Films Most Widely Used?

Three-layer co-extruded films has been widely used in food packaging, pharmaceutical packaging and industrial packaging for its versatility, value for money and environmental protection. Specifically:
I. Food Packaging: Core Application Area, accounting for Over 46%.
Food packaging is the largest market with three layers of three-layer co-extruded films, covering several segments including fresh produce, frozen foods and snack foods. Core needs include:
Fresh product packaging: Extends shelf life with anti-fogging and breathable properties. For example, a three-layer co-extruded films can control the permeability of oxygen and water vapor permeability and reduce spoilage in fruits and vegetables by regulating the barrier properties of intermediate materials such as EVOH.
Typical structure: PE/EVOH/PE (external PE layer provides mechanical strength, middle EVOH layer blocks oxygen, inner PE layer heat-seales).
Frozen Food Packaging: Depends on low temperature shock resistance to prevent low temperature damage. For example, three-layer co-extruded films can remain elastic at -50°C, making it suitable for packaging frozen dumplings, ice cream, etc.
Typical structure: PP/PE/PP (outer layer PP for puncture resistance, middle PE for toughness, inner PP for heat sealing).
Snack Food Packaging: Emphasize transparency and airtight to make shelves more attractive. For example, a three-layer co-extruded films can make packaging look more upscale by adjusting the sheen of an outer material,such as LLDPE.
Typical structure: PP/PE/PP (outer PP for stiff printing, middle PE for flexible printing, inner PP for heat sealing).
Market Drivers:
The development of e-commerce logistics and the upgrading of consumption have led to a surge in demand for high-barrier, biodegradable materials. For example, in Southeast Asia, the demand for three-layer co-extruded films increased by 18% year-on-year in 2024 due to the expansion of cold chain logistics coverage.
ii. Pharmaceutical packaging: a high value-added industry with an average annual demand growth rate 10%%. Pharmaceutical packaging requires high safety, stability and blockage of materials. Three-layer co-extruded films meets the following core requirements through formulation optimization and process control:
Pharmaceutical packaging: Must meet pharmaceutical grade standards, with high resistance (oxygen, humidity), puncture resistance and thermalsealing. For example, a three-layer co-extruded films can achieve complete barrier properties by adding aluminum foil layer (e.g., PET/AL/PE structure) to ensure stable drug quality.
Typical application: infusion bags, tablet packaging, ointment tubes, etc..
Medical device packaging: the material must withstand processes such as ethylene oxide sterilization, while maintaining material stability. For example, a three-layer co-extruded films can be constructed with a PET/EVOH/PP structure, in which the the EVOH layer has strong barrier properties and the PP layer can withstand sterilization treatment.
Typical application: prefilled syringe, dialysis membranes, surgical instrument packaging, etc..
Market Drivers:
Global aging and biomedical innovation are driving demand growth. For example, China's 14th Five-Year Plan explicitly lists high-performance packaging materials as a key area of development, provides tax breaks and subsidies to medical enterprises with medical three-layer co-extruded film companies, and promotes technological upgrading in the industry.
III. Industrial packaging: covering Diversified Demands in electronics, building materials and other areas
Industrial packaging demands for three-layer co-extruded films mainly focus on abrasion resistance, protective performance and customization. Typical applications include:
Electronic Component Packaging: Antistatic agents are required to protect components from electrostatic damage. For example, a three-layer co-extruded films can be constructed using a PET/PA/PE structure coupled with antistatic masterbatch reduce surface resistivity to 106-109 Ω/sq.
Typical applications: integrated circuits and precision sensor packaging.
Packaging of building materials: Exterior and intermediate layers of weatherproof toughness are required. For example, a three-layer co-extruded films can be constructed using a PP/PE/PP structure in which the outer layer of PP is resistant to UV aging, the middle layer of PE is scratch-resistant, and the inner layer of PP is thermally sealed.
Typical application: packing of steel pipes and aluminum profiles.
Market Drivers:
Emerging market industrialization accelerated, driving demand growth. For example, the packaging market demand market in the Middle East and Africa is gradually being released as an emerging growth point for three-layer co-extruded films, driven by the development of the food processing industry and improved medical infrastructure.