3 Layer Aluminum Plastic Composite Film

3 Layer Aluminum Plastic Composite Film for High Barrier Packaging

3 Layer Aluminum Plastic Composite Film is a multilayer flexible material combining an outer polymer film, a solid aluminum foil barrier layer and an inner sealing layer. Typical structures include PET/AL/PE, PET/AL/CPP and PA/AL/PE, with each layer selected to provide specific printing, barrier, mechanical and sealing functions.

The aluminum foil layer provides strong protection against oxygen, water vapor and light, while the polymer layers contribute mechanical strength, flexibility, printability, puncture resistance or heat-sealing performance according to the selected structure.

The material is available with a total laminate thickness of 50-200μm, aluminum foil thickness of 6-12μm and finished widths up to 2000mm. Glossy or matte surfaces and customized gravure printing can be supplied for flexible packaging and selected industrial applications.

For applications requiring controlled barrier performance, high-temperature processing, food contact, pharmaceutical use, static control or other specialized functions, the complete laminate structure and applicable test requirements should be confirmed before production.

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Technical Specifications

For an accurate quotation, provide the laminate structure, total thickness, aluminum foil gauge, roll width, roll length or diameter, core size, winding direction, quantity, printing requirements, heat-sealing conditions and final application.

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How the 3 Layer Structure Works

PET / AL / PE 3 Layer Composite Film

PET Outer Layer

PET provides tensile strength, dimensional stability and a suitable outer surface for printing and handling. It helps protect the aluminum layer during converting, filling and transportation.

Aluminum Foil Barrier Layer

The solid aluminum foil layer provides strong oxygen, moisture and light protection. Barrier performance depends on foil thickness, pinhole condition, flex damage and finished package integrity.

PE Heat-Sealing Layer

The PE inner layer provides flexibility and heat-sealing functionality for suitable pouches and flexible packaging. PE grade, seal initiation temperature, seal pressure and dwell time should match the buyer's packaging equipment.

Typical Uses

PET/AL/PE is suitable for many general high-barrier applications including coffee, tea, dry foods, powders, ingredients, nutritional products, industrial barrier bags and selected pharmaceutical or healthcare packaging after applicable material requirements are confirmed.

PET / AL / CPP 3 Layer Composite Film

PET/AL/CPP combines a PET outer layer, aluminum foil core and cast polypropylene sealing layer. CPP provides a different sealing and temperature profile from PE and can be selected for applications where polypropylene-based sealing performance is preferred.

The exact CPP grade must be selected according to filling temperature, sealing equipment and any post-packaging thermal treatment. Standard CPP should not automatically be assumed to meet high-temperature retort requirements.

PA / AL / PE 3 Layer Composite Film

Enhanced Puncture Resistance

PA Nylon provides greater toughness and puncture resistance than structures relying only on a conventional PET outer layer. It can therefore be considered for vacuum packaging and products that place greater mechanical stress on the pouch.

Vacuum Packaging Applications

PA/AL/PE can be evaluated for vacuum-packed foods, industrial components and other products requiring high barrier together with additional resistance to puncture and flex damage.

The required film gauge should be selected according to product weight, sharp edges, vacuum level, package size, storage environment and distribution conditions.

Key Performance Features

High Oxygen Barrier

Solid aluminum foil can provide very strong resistance to oxygen transmission when the foil remains intact. Where oxygen barrier is a contractual requirement, specify a numerical OTR target and the applicable test conditions.

High Moisture Barrier

The aluminum layer provides strong protection against water vapor. Numerical WVTR requirements should be specified together with test temperature, relative humidity and applicable method where shelf-life performance is critical.

Light Protection

The opaque foil layer protects light-sensitive contents by preventing direct light transmission through the laminate.

Mechanical Strength

The polymer outer layer helps reinforce the aluminum foil and improves handling performance during printing, lamination, pouch converting, filling, transport and storage.

Heat-Sealing Performance

PE or CPP inner layers provide heat-sealing functionality. Seal performance depends on polymer grade, temperature, pressure, dwell time, seal contamination and package design.

Lightweight Flexible Construction

Three-layer foil laminates provide high barrier protection in a relatively thin flexible construction, making them suitable for rollstock, pouches, sachets, liners and protective packaging.

Barrier Performance and Testing

Oxygen Transmission Rate

For products sensitive to oxidation, provide the maximum acceptable OTR together with test temperature and relative humidity. The final requirement should reflect the intended product and shelf-life target.

Water Vapor Transmission Rate

For moisture-sensitive products, specify the required WVTR and test conditions. Comparing barrier values measured under different conditions can produce misleading results.

Foil Integrity

Pinhole condition, cracking and flex damage can influence finished barrier performance. Applications requiring very long shelf life or demanding flex resistance should define appropriate foil and finished-package testing.

Finished Package Performance

Film barrier data alone does not define complete pouch performance. Seams, valves, zippers, closures, folds and converting damage can affect the overall barrier of the finished package.

Flexible Food Packaging Applications

Coffee and Tea Packaging

Three-layer aluminum laminates can be used for coffee, tea and similar products requiring protection against oxygen, moisture and light. Finished structure should be selected according to product type, expected shelf life and any valve or zipper requirements.

Snack and Dry Food Packaging

PET/AL/PE and PET/AL/CPP structures can be used for suitable snacks, nuts, powders, ingredients and other dry products requiring a high-barrier flexible package.

Vacuum Packaging

PA/AL/PE can be considered where vacuum packaging requires additional puncture resistance and mechanical durability. Product shape and edges should be considered when selecting total thickness.

Retort Packaging Projects

High-temperature retort processing requires a specifically qualified laminate construction. Standard PET/AL/PE, PA/AL/PE or PET/AL/CPP should not automatically be assumed to withstand a specified retort cycle.

For retort projects, provide sterilization temperature, holding time, pressure, food composition, filling conditions and required shelf life so that compatible adhesive and sealant systems can be evaluated.

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Pharmaceutical and Healthcare Packaging

High Barrier Sachets and Pouches

Suitable three-layer aluminum laminates can be evaluated for pharmaceutical powders, nutritional products, healthcare sachets and other high-barrier applications where the selected substrates, adhesives and inks satisfy the required product-contact and regulatory conditions.

Medical Device Packaging

Foil laminates can be evaluated for selected medical or diagnostic packaging when barrier, seal, sterilization and regulatory requirements are defined by the customer.

Blister Packaging Projects

Conventional PET/AL/PE packaging laminate should not automatically be treated as pharmaceutical blister foil. Blister lidding, tropical blister and cold-form applications use application-specific constructions that should be specified separately.

Industrial Applications

FIBC and Bulk Bag Liners

High-barrier foil laminates can be considered as liners for moisture-sensitive powders, chemicals, ingredients and other bulk products where the laminate strength, seam design and compatibility meet the filling and handling conditions.

Industrial Barrier Bags

PET/AL/PE and related structures can be converted into protective barrier bags for machinery parts, precision components and other products requiring moisture and environmental protection during storage and transportation.

Insulation Laminates

Three-layer foil composite materials can be evaluated as vapor-barrier or facing layers within suitable insulation systems. Thermal insulation performance depends on the complete assembly rather than the foil laminate alone.

Chemical Product Packaging

For chemical packaging, polymer compatibility, seal integrity, permeation, regulatory requirements and the actual chemical formulation must be reviewed before a laminate is selected.

Electronics and Technical Packaging

Moisture-Sensitive Components

Foil laminates can provide high moisture-barrier packaging for suitable electronics and precision components. Package construction should be selected according to storage conditions, moisture sensitivity and required sealing performance.

Static-Control Packaging

A conventional three-layer aluminum laminate should not automatically be described as anti-static or ESD protective. Where static-control performance is required, the laminate needs appropriate conductive, dissipative or shielding construction and measurable electrical requirements.

Battery Packaging Projects

General flexible-packaging laminates should not automatically be used as lithium-ion pouch-cell materials. Battery pouch film requires dedicated layer design, deep-drawing capability, electrolyte resistance, electrical insulation and controlled heat-sealing performance.

PET / AL / PE vs. PET / VMPET / PE

Printing and Surface Options

Gravure Printing

Custom gravure printing can be supplied according to approved artwork, number of colors, print repeat and roll configuration.

Glossy Finish

Glossy outer surfaces can be selected for packaging requiring a brighter visual appearance and conventional printed finish.

Matte Finish

Matte surface options can be specified where a lower-gloss appearance is required for branded or industrial packaging.

Quality Control Requirements

Total Thickness

Total laminate gauge should be checked against the agreed tolerance because variations can affect stiffness, converting and sealing behavior.

Aluminum Foil Gauge

Foil thickness should match the approved specification and application requirement. The listed foil range for this product is 6-12μm.

Lamination Bond Strength

Interlayer adhesion should be evaluated according to the laminate structure, adhesive, curing condition and final application.

Heat-Seal Strength

Seal strength requirements should reflect the selected PE or CPP layer, package weight, fill conditions and sealing equipment.

OTR and WVTR

Where oxygen or water-vapor transmission is controlled, target values and test conditions should be agreed before production.

Roll Appearance

Roll edges, winding, wrinkles, contamination, splices and other converting-related requirements should be defined according to the customer's production equipment.

Packaging and Delivery

The composite film can be supplied as rollstock using eye-to-sky, eye-to-wall or other suitable roll-packaging arrangements. Export-standard wooden pallets and moisture-resistant outer packaging help protect rolls during storage and international transportation.

The listed lead time is approximately 10-20 days, subject to selected laminate structure, printing, order quantity, material availability and production schedule.

Customization Options

Layer Structure

PET/AL/PE, PET/AL/CPP and PA/AL/PE structures can be selected according to barrier, sealing, mechanical and converting requirements.

Total Thickness

Total laminate thickness can be specified within the listed 50-200μm range according to product protection, stiffness and converting requirements.

Aluminum Foil Thickness

Aluminum foil from 6μm to 12μm can be selected according to the required barrier, flex and processing characteristics.

Roll Width and Length

Widths up to 2000mm are available. Roll length, maximum roll diameter, core size and winding direction should be specified for converting-line compatibility.

Printing and Appearance

Gravure printing, matte and glossy surface requirements can be customized according to approved artwork and final packaging design.

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How to Specify 3 Layer Aluminum Composite Film

Identify the Application

State whether the material is intended for food packaging, vacuum packaging, industrial protection, pharmaceutical packaging, insulation, electronics or another application.

Specify the Layer Structure

Provide PET/AL/PE, PET/AL/CPP, PA/AL/PE or the currently approved material structure where known.

Provide Thickness Requirements

Specify total laminate thickness and, where controlled, individual PET, PA, aluminum foil, PE or CPP layer thicknesses.

Specify Barrier Requirements

Provide target OTR, WVTR or other barrier requirements together with the applicable test conditions where product shelf life depends on measured performance.

Provide Heat-Sealing Conditions

State the sealing temperature, dwell time, pressure and packaging equipment where these parameters are already established.

Provide Roll Specifications

Specify film width, roll length or diameter, core size, winding direction and order quantity.

Provide Printing Requirements

For printed film, provide artwork, print colors, repeat length, matte or glossy requirement and approved color references.

Identify Compliance Requirements

For food, pharmaceutical, healthcare, electronics or other regulated applications, identify the destination market and required material or testing documentation before production.

Frequently Asked Questions

What is 3 Layer Aluminum Plastic Composite Film?

It is a three-layer laminate combining polymer film, solid aluminum foil and a sealing polymer to provide barrier, mechanical and heat-sealing performance for suitable flexible packaging and industrial applications.

What are the main three-layer structures?

The listed structures are PET/AL/PE, PET/AL/CPP and PA/AL/PE.

What does each PET/AL/PE layer do?

PET provides outer-layer strength and printability, aluminum foil provides the primary oxygen, moisture and light barrier, and PE provides the heat-sealing inner layer.

What is the difference between PET/AL/PE and PA/AL/PE?

PET/AL/PE is commonly selected where printability, dimensional stability and general high-barrier packaging performance are important. PA/AL/PE adds Nylon as the outer reinforcing layer and can provide greater toughness and puncture resistance.

What is the difference between PE and CPP sealing layers?

PE and CPP have different sealing, stiffness and thermal characteristics. The appropriate material should be selected according to packaging equipment, product contact and thermal-processing requirements.

What total thickness is available?

The listed total laminate thickness range is 50-200μm.

What aluminum foil thickness is available?

The listed aluminum foil thickness range is 6-12μm.

What is the maximum available width?

The current listed maximum width is 2000mm, subject to the required laminate structure and thickness.

Can the composite film be printed?

Yes. Custom gravure printing is available according to approved artwork and production requirements.

Are matte and glossy surfaces available?

Yes. Both matte and glossy surface options are listed for this product.

Does PET/AL/PE provide good oxygen and moisture barrier?

Yes. Solid aluminum foil provides strong oxygen, moisture and light protection when the foil and finished package remain intact. Numerical OTR and WVTR requirements should be specified where controlled.

Can it be used for vacuum packaging?

Yes. Suitable structures, particularly PA/AL/PE where additional puncture resistance is required, can be evaluated for vacuum packaging according to product shape, vacuum level, film thickness and sealing requirements.

Can it be used for retort pouches?

A specifically qualified laminate can be developed for retort applications, but a standard three-layer structure should not automatically be assumed to withstand high-temperature sterilization. The sterilization cycle and required sealant system must be confirmed.

Can PET/AL/PE be used for pharmaceutical blister packaging?

Standard PET/AL/PE flexible laminate is different from dedicated pharmaceutical blister lidding or cold-form foil. Pharmaceutical blister projects should specify the exact blister construction separately.

Can this material be used for medical packaging?

It can be evaluated for suitable medical and healthcare packaging where the laminate, sealing, sterilization and applicable regulatory requirements are defined and met.

Can it be used as a moisture barrier bag for electronics?

Foil laminate can provide strong moisture protection, but electronics packaging requiring a specified moisture-barrier, ESD or shielding standard should use a construction tested to those requirements.

Is the standard film anti-static?

Not necessarily. Anti-static or static-dissipative performance requires an appropriate material construction and measurable electrical specification.

Can it be used as lithium battery pouch film?

General three-layer flexible packaging film should not automatically be used for lithium-ion pouch cells. Battery pouch laminate requires dedicated materials and validated forming, electrolyte-resistance, insulation and heat-sealing performance.

Can the structure be customized?

Yes. Layer structure, total thickness, foil gauge, width, roll configuration, printing and surface finish can be customized according to application requirements.

What is the typical delivery time?

The current listed lead time is approximately 10-20 days, depending on structure, printing, order quantity and production schedule.

What information should I provide for a quotation?

Please provide the final application, PET/AL/PE, PET/AL/CPP or PA/AL/PE structure if known, total thickness, aluminum foil thickness, width, roll length or diameter, core size, winding direction, quantity, OTR/WVTR requirements, heat-sealing conditions, printing requirements, compliance requirements and delivery destination.

Request a Quote for 3 Layer Aluminum Plastic Composite Film

If you are sourcing PET/AL/PE, PET/AL/CPP or PA/AL/PE composite film for flexible packaging, vacuum packaging, industrial barrier bags, healthcare packaging or other high-barrier applications, send us your required structure, dimensions, barrier requirements and quantity for specification confirmation and quotation.

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