Oxygen Barrier Aluminium Laminate Film for High-Barrier Flexible Packaging

Oxygen Barrier Aluminum Laminate Film for Flexible Packaging

Oxygen barrier aluminum laminate film is a multilayer flexible packaging material developed for products requiring strong protection from oxygen, water vapor, light, aroma loss and external contamination.

Typical structures include PET / AL / PE, PET / AL / CPP and PA / AL / PE. The outer polymer layer provides printing and mechanical support, solid aluminum foil provides the primary oxygen and moisture barrier, and PE or CPP provides the heat-sealing surface.

For applications requiring greater puncture and flex resistance, Nylon-containing structures such as PET / AL / NY / PE can also be developed. For retort, pharmaceutical blister, lithium-ion battery or ESD-sensitive electronic packaging, dedicated material structures and qualification requirements should be specified separately.

The current product range covers total thicknesses from 40 μm to 250 μm, aluminum foil from 6 μm to 15 μm and finished widths up to 2000mm. Printing, laminate structure, roll dimensions, sealing layer and barrier targets can be customized according to the final packaging application.

Request an Oxygen Barrier Film Quote

Technical Specifications

The terms high barrier and ultra-high barrier should be supported by measurable OTR and WVTR requirements where package performance is critical. Barrier values from different suppliers should only be compared when the test methods and environmental conditions are equivalent.

Send Your Oxygen Barrier Requirements

How an Aluminum Oxygen-Barrier Laminate Works

PET Outer Layer

PET is commonly used as the outside layer because it provides a stable printing surface, good dimensional stability and useful abrasion resistance during converting and distribution.

Solid Aluminum Foil Layer

The aluminum foil is the primary barrier layer. A continuous foil layer provides very strong resistance to oxygen, water vapor and light transmission and also provides excellent odor and aroma containment.

In real packages, barrier performance can be reduced by foil pinholes, flex cracking, folds, punctures or defective seals. The finished package should therefore be evaluated rather than relying only on flat-film measurements.

PE or CPP Seal Layer

The inner PE or CPP layer provides heat-sealing capability and usually forms the direct product-contact surface. The sealant should be matched to the filling process, storage temperature and required package integrity.

PA / Nylon Reinforcement

Nylon can be added where the package requires greater puncture, tear or flex resistance. It is particularly useful for vacuum packages, liquids, heavy products and contents with hard edges.

Understanding OTR

Oxygen Transmission Rate measures the amount of oxygen that passes through a packaging material under defined conditions. Lower values indicate stronger oxygen-barrier performance.

A commonly referenced test for flexible packaging is ASTM D3985 when applicable. Any OTR requirement should state the test temperature, relative humidity and units together with the maximum allowed value.

OTR is especially important for foods containing fats and oils, coffee, tea, spices, vitamins, pharmaceuticals and industrial products whose quality can deteriorate through oxidation.

Understanding WVTR

Water Vapor Transmission Rate measures moisture passing through a packaging material under specified temperature and humidity conditions.

ASTM F1249 is one commonly used method where applicable. Because moisture transmission changes with environmental conditions, a WVTR figure without temperature and relative-humidity information provides incomplete purchasing information.

Solid Aluminum Foil vs Metallized Film

Barrier Structure Selection

Food Packaging Applications

Coffee, Tea and Spices

PET / AL / PE is suitable for products that require strong oxygen, moisture, aroma and light protection. The opaque foil layer is particularly useful where product visibility is not required.

Powders and Nutritional Products

Powders, supplements, milk powder and other hygroscopic products can benefit from low oxygen and water-vapor transmission when the finished package remains intact.

Snack Packaging

Solid foil can be used where maximum light and oxygen barrier is required, although metallized structures may be more economical where the required shelf life permits a lower barrier level.

Vacuum Packaging

Where vacuum draws the laminate tightly around a product, Nylon reinforcement can improve resistance to puncture and flex cracking. Vacuum itself does not replace the need for sufficient oxygen and moisture barrier.

Retort Packaging Requires a Dedicated Structure

Standard PET / AL / PE or PET / AL / CPP laminate should not automatically be used for high-temperature sterilization.

Retort packages require heat-resistant films, retort-grade adhesive and a suitable inner sealing layer such as RCPP. Nylon is often incorporated to provide additional mechanical strength during thermal processing and handling.

A structure such as PET / AL / NY / RCPP can be developed for applicable 121–135°C processes, but the exact construction must be validated against the actual product, process temperature, holding time and package dimensions.

Pharmaceutical Sachets vs Blister Packaging

High-barrier PET / AL / PE and related laminates can be developed for suitable pharmaceutical sachets, stick packs and powder or liquid unit-dose packaging.

Conventional PTP blister lidding is a different product. It commonly uses hard-temper aluminum such as AA8011-H18 in approximately 20–30 μm foil, with a printable or protective outer surface and a heat-seal lacquer designed for PVC, PVDC or another blister forming web.

Cold-form pharmaceutical foil is also a separate structure, commonly using Nylon / Aluminum / PVC or related combinations with much thicker aluminum than a general flexible pouch laminate.

Industrial Moisture and Oxygen Barrier Packaging

Aluminum foil laminate can be used for industrial components, powders, chemicals and other moisture- or oxidation-sensitive products requiring high barrier during warehousing or export transportation.

Industrial Barrier Liners

Wide-width foil laminates can be converted into suitable liners or barrier bags where oxygen, moisture and light exposure must be reduced. Mechanical reinforcement should be selected according to product weight and handling conditions.

Chemical Packaging

Chemical compatibility must be verified between the packed product and the inner sealant, adhesive and other laminate layers. A foil barrier does not make the complete laminate universally resistant to acids, alkalis or solvents.

Metal Components

High-barrier bags can help reduce external moisture and oxygen exposure for suitable metal parts. Depending on the metal, storage duration and environment, a desiccant or compatible VCI system may also be required.

Electronic Component Protection

Foil-based moisture-barrier materials can be used to protect suitable moisture-sensitive electronic components, but oxygen and moisture barrier alone do not provide complete ESD protection.

Where ESD-sensitive devices are packed, the complete laminate may require controlled surface resistance, static-dissipative layers, ESD shielding and compliance with the applicable electronics packaging specification.

For moisture-sensitive semiconductor devices, buyers should specify the applicable moisture-barrier, ESD and dry-pack requirements rather than assuming a standard PET / AL / PE pouch is equivalent to a dedicated electronics moisture-barrier bag.

Lithium-Ion Battery Pouch Film Is a Separate Material

A general oxygen-barrier laminate should not automatically be used as lithium-ion battery pouch material.

Battery aluminum-plastic film is a specialized composite designed for deep forming, electrical insulation, electrolyte resistance and long-term sealing. Typical battery pouch constructions use Nylon or another tough outer layer, a substantially thicker treated aluminum foil and a specialized CPP or PP inner layer.

Battery projects should therefore specify forming depth, aluminum treatment, electrolyte compatibility, insulation, seal strength and battery-specific qualification requirements separately.

Why Foil Gauge and Pinhole Control Matter

Solid aluminum provides very high barrier while the foil remains continuous. Very thin foil can contain or develop microscopic pinholes, and severe folding can create flex cracks.

For long-shelf-life, export or highly sensitive products, buyers can specify allowable pinhole limits, foil gauge and flex-durability testing rather than relying only on the nominal laminate thickness.

Seal Integrity Is Part of the Barrier System

Even an extremely low-OTR laminate cannot protect a product if the pouch seal contains wrinkles, product contamination or incomplete sealing channels.

Seal Temperature

The PE or CPP sealant must receive sufficient heat to form a continuous seal without excessive thinning or distortion.

Seal Pressure and Dwell Time

Seal formation depends on the combined effect of jaw temperature, pressure and contact time. High-speed packaging lines should establish an operating window using actual production material.

Seal Strength Testing

Seal strength can be specified using an applicable method such as ASTM F88 when required. The test should identify seal conditions, sample width and conditioning procedure.

Food-Contact and Regulatory Requirements

Food-contact suitability applies to the exact finished laminate and intended conditions of use rather than to aluminum foil alone.

The PET, PA, PE, CPP or RCPP films, adhesive, printing ink and other package components can each be subject to applicable food-contact requirements. Required declarations or migration documentation should therefore correspond to the actual structure supplied.

For pharmaceutical or medical applications, additional product-specific documentation and package validation may be required.

Quality Control Requirements

Total Thickness

Consistent laminate gauge supports stable converting, sealing and mechanical performance.

Aluminum Foil Gauge

Foil thickness should be verified separately from total laminate thickness because it directly influences barrier integrity and flex durability.

Pinhole Inspection

Pinhole limits can be specified where very low gas or moisture transmission is required.

Laminate Bond Strength

Peel-strength testing can be used to monitor interlayer adhesion and reduce the risk of delamination during pouch converting, filling, storage or thermal processing.

OTR

Numerical oxygen-transmission testing should be carried out under the agreed method and environmental conditions when an OTR limit is part of the specification.

WVTR

Moisture-transmission testing should likewise state the test method, temperature and relative humidity.

Seal Strength

Seal strength should be evaluated using the actual sealant layer and representative packaging-line conditions.

Puncture Resistance

Puncture testing is important for vacuum packs, industrial components and packages containing sharp or irregular products.

Flex Durability

Flex testing can help determine whether repeated bending causes foil cracking and barrier loss.

Residual Solvent

Printed and adhesive-laminated packaging can include a residual-solvent limit according to the ink, adhesive and end-use requirements.

Roll Quality

Edge alignment, winding tension, curl, telescoping, splice limits and surface condition should be controlled according to downstream converting equipment.

Information Required for a Quotation

For accurate laminate selection and pricing, please provide:

• Final application

• Packed product

• Food, pharmaceutical, industrial or electronic use

• Required laminate structure

• Total thickness

• Aluminum foil thickness

• Required OTR and test conditions

• Required WVTR and test conditions

• Pinhole limit if required

• Puncture or flex-resistance requirement

• Seal-strength requirement

• Sealing temperature, pressure and dwell time if known

• Retort process if applicable

• Vacuum requirement if applicable

• Chemical compatibility requirements

• ESD requirements for electronic packaging if applicable

• Printing artwork and number of colors

• Required width

• Core ID and maximum roll OD

• Winding direction

• Required regulatory or technical documentation

• Order quantity

• Destination market

Get a Custom Oxygen Barrier Film Proposal

Packaging & Delivery

Oxygen barrier aluminum laminate film can be supplied in master rolls or slit rolls, with core ID, roll OD, roll length and winding direction configured according to printing, laminating and pouch-making equipment.

Export packaging can include moisture-resistant wrapping, edge protection, reinforced pallets and wooden cases. Eye-to-sky or eye-to-wall arrangements can be discussed according to roll dimensions and handling equipment.

The current product program lists an approximate 10–20 day lead time for applicable orders. Printed, reinforced, retort-grade or specially converted projects may require a different production schedule.

Wooden Case Packing

Pallet Coil Packing

Alu Foil Barrier Bag

Why Source Oxygen Barrier Laminate from Dingang?

Application-Specific Layer Structures

PET, PA, Nylon, aluminum foil, PE, CPP and RCPP layers can be configured according to oxygen barrier, moisture barrier, puncture resistance and sealing requirements.

Solid Aluminum Barrier Options

Solid aluminum foil structures are available where strong oxygen, moisture, light and odor protection is required.

Nylon-Reinforced Structures

Nylon-containing laminates can be developed for vacuum, liquid, heavy and puncture-sensitive applications requiring greater mechanical durability.

Custom Printing and Roll Dimensions

Gravure printing, slit width, core ID, roll OD and winding direction can be matched to compatible downstream production equipment.

Project-Specific Barrier Testing

OTR, WVTR, laminate bond, seal strength, puncture resistance, flex durability and other critical values can be defined according to the finished package.

Frequently Asked Questions

What is oxygen barrier aluminum laminate film?

It is a multilayer flexible packaging material containing solid aluminum foil together with polymer films that provide printing, mechanical strength and heat-sealing functions.

Why does aluminum foil provide a strong oxygen barrier?

Continuous aluminum foil is a metallic barrier rather than a permeable polymer layer, so intact foil provides extremely strong resistance to oxygen and water-vapor transmission.

What is OTR?

OTR is the Oxygen Transmission Rate through a packaging material under specified conditions. Lower OTR indicates stronger oxygen-barrier performance.

What is WVTR?

WVTR is the Water Vapor Transmission Rate through a material. The reported value must be interpreted together with the test temperature and relative humidity.

Is solid foil better than metallized PET?

Solid foil generally provides stronger oxygen, moisture, light and odor barrier. Metallized PET can be lighter and more economical where the required barrier is less demanding.

Can the laminate have a transparent window?

A continuous solid aluminum layer is opaque. A transparent window removes the aluminum barrier from that area and therefore changes the overall package barrier performance.

Why add Nylon to an aluminum laminate?

Nylon improves puncture resistance, toughness and flex durability, making it useful for vacuum packs, liquids, heavy products and irregular contents.

Can PET / AL / PE be used for food packaging?

Suitable structures can be used for food packaging when the exact films, adhesives, inks and sealant layer meet the applicable requirements for the intended food and conditions of use.

Can standard PET / AL / PE be used for retort?

Standard PET / AL / PE should not automatically be used for retort sterilization. A dedicated retort structure with suitable films, retort adhesive and RCPP should be selected and validated.

Can the laminate be used for pharmaceutical sachets?

Yes, suitable PET / AL / PE and related structures can be developed for pharmaceutical sachets and stick packs where the required product-contact and regulatory conditions are defined.

Is this the same as pharmaceutical blister foil?

No. Conventional PTP blister lidding uses a different aluminum temper, foil gauge and heat-seal lacquer system. Cold-form blister foil is also a separate multilayer structure.

Can it be used for electronic components?

It can provide moisture and oxygen barrier for suitable components, but ESD-sensitive devices may require a dedicated static-dissipative or shielding laminate with separate electrical performance requirements.

Is this the same as lithium-ion battery pouch film?

No. Lithium-ion battery pouch film is a specialized aluminum-plastic laminate designed for deep forming, electrolyte resistance, insulation and battery sealing. It should be specified separately.

Can it be used for chemical packaging?

Only after chemical compatibility has been reviewed for the actual product, concentration, temperature and contact duration. The inner sealant and adhesive must also be compatible.

Does high barrier automatically guarantee a long shelf life?

No. Final shelf life depends on the product, processing, residual oxygen, package seals, barrier performance, storage conditions and distribution environment. Shelf life should be validated using the finished product and package.

Can custom printing be supplied?

Yes. Gravure printing can be supplied for compatible rollstock and pouch applications. Artwork, number of colors, repeat length and winding direction should be confirmed before production.

What information is needed for an accurate quotation?

Please provide the packed product, laminate structure, thickness, aluminum gauge, required OTR and WVTR, puncture requirements, seal conditions, printing, roll dimensions, processing conditions, documentation requirements, quantity and destination.

Should samples be tested before bulk production?

Yes. Representative trials using the actual product and converting equipment are recommended to verify barrier, sealing, laminate adhesion, puncture resistance and finished-package performance.

Contact Dingang for Samples and Custom Pricing