PVC/PE/PVDC Pharmaceutical Blister Film: Barrier & Buying Guide

High-Barrier PVC/PE/PVDC Film for Pharmaceutical Blister Packaging

PVC/PE/PVDC pharmaceutical blister film is a multilayer thermoformable packaging structure designed for pharmaceutical products that require a stronger moisture and oxygen barrier than conventional rigid PVC while also benefiting from improved forming flexibility.

Often described as a triplex blister film, the structure combines rigid PVC for thermoforming support, a PE functional layer for flexibility and processing performance, and PVDC for moisture, oxygen and gas barrier protection.

For pharmaceutical manufacturers and blister converters, however, simply specifying “PVC/PE/PVDC” is not enough. The final structure should be selected according to drug stability, target WVTR, target OTR, PVDC coating weight, cavity depth, forming conditions, lidding foil, sealing window, blister machine and destination-market requirements.

Wallis supplies high-barrier PVC/PE/PVDC pharmaceutical blister film with customized thickness, PVDC coating weight, width, color and roll configuration for B2B pharmaceutical packaging projects.

What Is PVC/PE/PVDC Triplex Pharmaceutical Film?

PVC/PE/PVDC is a three-component pharmaceutical packaging structure in which each material contributes a different function. This allows the complete film to balance rigidity, forming behavior, flexibility and barrier performance more effectively than relying on a single polymer.

PVC Layer – Thermoforming and Structural Support

The rigid PVC layer provides the main dimensional stability and thermoforming support. During blister production, the web is heated and formed into cavities that hold tablets, capsules or other suitable pharmaceutical products.

PVC also helps provide the stiffness required for winding, machine transport, forming and downstream blister handling.

PE Layer – Flexibility and Processing Performance

PE is more flexible than rigid PVC. In a PVC/PE/PVDC triplex structure, the PE layer can improve toughness and help the multilayer web tolerate greater deformation during thermoforming.

This is one reason triplex films are frequently evaluated for deeper or wider blister cavities. The exact forming benefit depends on PE thickness, total laminate thickness, cavity geometry, heating profile and tooling.

PVDC Layer – Moisture and Oxygen Barrier

PVDC provides the primary high-barrier function by reducing the transmission of water vapor, oxygen and other gases through the packaging structure.

PVDC coating weight is an important specification, but it is not the only factor determining final barrier performance. PVDC formulation, coating uniformity, substrate structure, thermoforming conditions and finished cavity geometry can all influence measured performance.

Why Add PE Between PVC and PVDC?

The major difference between conventional PVC/PVDC duplex film and PVC/PE/PVDC triplex film is the additional PE layer. This layer changes the mechanical and processing behavior of the forming web.

Improved Flexibility

PE introduces a more flexible intermediate layer between the rigid PVC structure and the PVDC barrier layer. This can improve overall toughness and help reduce stress during selected forming operations.

Better Suitability for Deep or Wide Cavities

Triplex film is commonly considered when a blister requires greater material deformation, such as larger tablets, capsules, soft gels or other products requiring deeper cavity geometry.

Functional Sealing Performance Depends on the Structure

PE can contribute to sealing functionality in appropriately designed multilayer structures, but buyers should not assume that every PVC/PE/PVDC film automatically seals directly to every aluminum foil.

Final sealing performance depends on the exposed sealing surface, lidding-foil heat-seal lacquer, temperature, pressure, dwell time and machine configuration. The forming web and lidding material should be qualified together.

Wallis PVC/PE/PVDC Technical Specifications

The following values summarize the current Wallis product range. Final layer ratios, dimensional tolerances, coating weight and barrier values should be confirmed for the exact pharmaceutical project.

How PVDC Coating Weight Affects Barrier Performance

PVDC coating weight is one of the most important variables in high-barrier blister-film design. In general, increasing an appropriately formulated PVDC coating can reduce moisture and oxygen transmission through the film.

However, coating weight should not be treated as a substitute for measurable barrier data.

60 g/m² Class

A lower coating-weight specification within the Wallis range can be evaluated when the pharmaceutical product needs a meaningful improvement over plain PVC but does not require the highest barrier level available from the triplex family.

90 g/m² Class

Intermediate PVDC coating weights may be evaluated when stronger moisture and oxygen protection is required while maintaining transparent thermoformed blister packaging.

120 g/m² Class

Higher coating weights within the current Wallis range can provide stronger barrier performance. Extremely moisture-sensitive formulations may still require comparison with super-high-barrier PVDC, PCTFE-based film or cold-form aluminum.

Do Not Specify Barrier by Coating Weight Alone

Two films with the same nominal PVDC coating weight can have different WVTR and OTR values because coating chemistry, uniformity, PE layer, PVC substrate and processing conditions may differ.

Pharmaceutical buyers should therefore define barrier targets using measurable transmission values together with the applicable test conditions.

WVTR and OTR: The Two Key Barrier Metrics

What Is WVTR?

Water Vapor Transmission Rate (WVTR) indicates the amount of water vapor that passes through a packaging material under defined test conditions. Lower WVTR generally indicates stronger moisture-barrier performance.

WVTR is particularly important for hygroscopic tablets, capsules and formulations whose chemical or physical stability is affected by moisture.

What Is OTR?

Oxygen Transmission Rate (OTR) indicates the amount of oxygen passing through the packaging material under specified conditions. Lower OTR is desirable when oxidation is an important stability risk.

Always Include Test Conditions

Barrier figures should be compared only when temperature, relative humidity, thickness and test method are equivalent. A WVTR or OTR number without its test conditions is not a complete pharmaceutical packaging specification.

Key Advantages of PVC/PE/PVDC Pharmaceutical Film

High Moisture Barrier

PVDC can substantially reduce moisture transmission compared with conventional mono PVC, allowing triplex film to be evaluated for pharmaceutical products affected by humidity exposure.

High Oxygen and Gas Barrier

PVDC also contributes oxygen and gas barrier performance, making PVC/PE/PVDC relevant when oxidation or gas exposure is part of the drug-stability profile.

Improved Deep-Draw Formability

The more flexible PE layer can make selected triplex structures useful for deeper or wider blister cavities compared with more rigid structures. Production trials should still be performed on the intended blister machine and tooling.

Transparent Product Visibility

Transparent triplex structures can maintain product visibility while providing a stronger barrier than standard clear PVC. This can be useful when visual inspection and transparent blister presentation are required.

Customizable Barrier and Processing Structure

Total thickness, PE layer, PVDC coating weight, color, width and roll configuration can be discussed according to the drug's stability target and the packaging line.

Flat-Film Barrier vs. Formed-Blister Barrier

A pharmaceutical blister film is stretched during thermoforming. As the material is drawn into a cavity, individual layers can become thinner at the sidewalls, corners and deepest sections.

This means the barrier performance of a flat roll sample is not necessarily identical to the barrier performance of the finished blister cavity.

Cavity Geometry Matters

Deeper cavities and aggressive draw ratios can create greater material thinning. Tablet dimensions, capsule dimensions, cavity depth, corner radius and web thickness should therefore be evaluated together.

Heating Profile Matters

Heating temperature, heating time, tooling and forming pressure or vacuum can affect material distribution across the cavity.

Validate the Finished Pack

Critical pharmaceutical projects should validate the formed and sealed blister under the intended production and stability conditions rather than relying only on a flat-film TDS.

PVC/PE/PVDC vs. Other Pharmaceutical Blister Structures

The highest-barrier structure is not automatically the best option. Packaging engineers should select the material that meets the drug-stability requirement while also maintaining acceptable forming performance, package size, machine efficiency and total packaging cost.

Pharmaceutical Applications of PVC/PE/PVDC Film

Tablet Blister Packaging

PVC/PE/PVDC can be evaluated for tablets requiring stronger moisture and oxygen protection than conventional PVC while retaining transparent thermoformed packaging.

Capsule and Soft-Gel Blisters

Capsules and soft gels can require larger or deeper cavities. Triplex structures can be evaluated where improved formability and high barrier are both important.

Moisture-Sensitive Formulations

PVDC-based structures can help reduce humidity exposure for moisture-sensitive pharmaceuticals. The required coating weight should be determined by the formulation's stability data rather than selected from a generic “high-barrier” label.

Nutraceuticals and Supplements

Vitamins, probiotics and other oxygen- or moisture-sensitive nutraceutical products can also be evaluated with PVC/PE/PVDC when the measured barrier performance meets their shelf-life requirements.

Export Packaging for Humid Climates

Products distributed into hot or humid regions may need higher moisture-barrier performance than products stored under less demanding environmental conditions. Packaging selection should be aligned with the intended stability-storage and distribution environment.

Lidding Foil and Heat-Seal Compatibility

A blister pack is a complete packaging system. The forming web cannot be qualified independently from the lidding material and sealing process.

Buyers should specify the intended aluminum foil or polymer lidding film, including the heat-seal lacquer where relevant.

Sealing Temperature

Seal initiation and optimum sealing temperatures depend on both sides of the packaging system. Excessive temperature can also influence film deformation and line performance.

Pressure and Dwell Time

Seal pressure and dwell time should be optimized together with temperature to establish a reliable sealing window at the intended machine speed.

Seal Integrity Testing

Finished blister packs should be evaluated for seal quality and package integrity using appropriate validated methods for the intended product and market.

Can PVC/PE/PVDC Run on High-Speed Blister Machines?

Suitable PVC/PE/PVDC structures can be evaluated on commercial pharmaceutical blister lines, including rotary and flat-bed forming systems.

Machine compatibility depends on the exact blister machine, forming temperature, heating-zone design, cavity geometry, roll width, web tension, sealing window and line speed.

Buyers changing from PVC/PVDC to PVC/PE/PVDC should therefore run a production trial rather than assuming that the existing processing settings can remain unchanged.

Pharmaceutical Packaging Qualification and Compliance

A statement such as “pharmaceutical grade” or “complies with pharmaceutical standards” should not be treated as universal approval for every medicinal product or destination market.

Packaging suitability depends on the complete container-closure system and should be evaluated for protection, compatibility, safety and performance in relation to the intended pharmaceutical product.

Buyers should request documentation applicable to the exact grade, structure and destination market and complete their own pharmaceutical packaging qualification and stability program.

Quality Control for PVC/PE/PVDC Blister Film

High-barrier pharmaceutical film requires control of both dimensional properties and multilayer performance.

• Total thickness: confirm nominal gauge and tolerance.

• PVDC coating weight: verify against the approved barrier specification.

• Coating uniformity: inconsistent coating can influence barrier and forming performance.

• Interlayer bond strength: inspect for delamination during winding, heating and thermoforming.

• WVTR and OTR: test according to agreed environmental conditions and methods.

• Optical quality: inspect transparency, haze, contamination and visible defects where applicable.

• Roll width and winding: confirm suitability for the intended blister line.

• Thermoforming trial: evaluate cavity definition, thinning, cracking and web stability.

• Seal trial: qualify the actual forming web together with the selected lidding material.

How to Choose the Right PVC/PE/PVDC Structure

1. Start With the Drug Stability Profile

Determine whether moisture, oxygen, light or another environmental factor is the main degradation risk.

2. Define the Required WVTR and OTR

Replace vague terms such as “very high barrier” with measurable target values whenever possible.

3. Define Cavity Depth and Geometry

Provide tablet or capsule size, cavity depth, corner radius and blister drawing so the required forming behavior can be evaluated.

4. Provide the Existing Blister Machine

Machine model, forming method, line speed, roll width, heating system and tooling information can reduce qualification risk.

5. Confirm the Lidding Material

The bottom forming web and lidding foil should be selected and tested as a complete sealing system.

6. Select PVDC Coating Weight

Use coating weight as one design variable, but approve the final structure based on measured barrier and stability requirements.

7. Run Forming and Sealing Trials

Test the material on the intended production equipment and inspect formed-cavity quality, delamination, seal integrity and machine stability.

8. Complete Stability Qualification

Final shelf-life suitability should be supported by the pharmaceutical manufacturer's validated stability program using the actual packaging system.

What Information Should Buyers Include in a PVC/PE/PVDC RFQ?

• Application: tablet, capsule, soft gel, nutraceutical or other pharmaceutical blister.

• Current structure: existing PVC/PE/PVDC specification or supplier TDS if available.

• Total thickness: required nominal thickness and tolerance.

• PE layer: required thickness or existing structure if already defined.

• PVDC coating weight: 60, 90, 120 g/m² or other validated requirement.

• Target WVTR: include temperature, relative humidity and test method.

• Target OTR: include temperature, relative humidity and test method.

• Roll width: required slit width.

• Roll specification: core diameter, maximum OD, winding direction and roll weight where required.

• Color: transparent, tinted or customized.

• Blister machine: manufacturer, model, rotary or flat-bed forming and expected line speed.

• Cavity drawing: product dimensions, cavity depth and forming geometry.

• Lidding foil: foil structure and heat-seal lacquer specification.

• Destination climate: expected storage and distribution environment.

• Destination market: required pharmaceutical documentation or regulatory references.

• Quantity: trial quantity, validation requirement and expected commercial demand.

Why B2B Buyers Work With Wallis for PVC/PE/PVDC Film

Custom PVDC Coating Weight

Barrier structures can be discussed according to target moisture and oxygen transmission rather than using one universal coating configuration for every pharmaceutical application.

Customized Thickness and Roll Width

Total thickness, width and roll configuration can be matched to customer blister equipment and approved packaging drawings subject to production confirmation.

Forming and Sealing Sample Support

Trial material can be evaluated for thermoforming behavior, cavity geometry and sealing compatibility before commercial qualification.

B2B Pharmaceutical Packaging Supply

Wallis supports pharmaceutical packaging converters, medicine manufacturers, distributors and healthcare packaging buyers requiring customized high-barrier roll materials.

Frequently Asked Questions About PVC/PE/PVDC Pharmaceutical Film

What is PVC/PE/PVDC pharmaceutical blister film?

PVC/PE/PVDC is a multilayer blister film combining rigid PVC thermoforming support, a flexible PE functional layer and a PVDC coating that provides moisture and oxygen barrier performance.

What is triplex pharmaceutical blister film?

Triplex generally refers to a three-component pharmaceutical forming structure such as PVC/PE/PVDC. It is commonly selected when both high barrier and improved forming behavior are required.

What is the difference between PVC/PVDC and PVC/PE/PVDC?

PVC/PVDC combines a rigid PVC base with PVDC barrier coating. PVC/PE/PVDC adds a PE layer that can improve flexibility and processing performance, making the structure useful to evaluate for deeper or wider cavities.

What does the PE layer do in PVC/PE/PVDC?

PE provides additional flexibility and can improve multilayer processing and forming behavior. Depending on the exact structure, it may also contribute to sealing functionality.

What does the PVDC coating do?

PVDC reduces water-vapor, oxygen and gas transmission, providing the principal high-barrier function in the triplex structure.

What PVDC coating weights does Wallis offer?

The current Wallis product range lists approximately 60–120 g/m². Final coating weight should be selected according to the required WVTR, OTR and packaging qualification.

Is 120 g/m² PVDC always better than 60 g/m²?

A higher coating weight can provide stronger barrier performance within an appropriately designed system, but the best specification is the one that meets the drug's stability requirement while maintaining suitable forming, cost and machine performance.

Is PVC/PE/PVDC suitable for deep-draw blister packs?

Yes, suitable triplex structures can be evaluated for deep or large cavities. Actual capability depends on total thickness, PE layer, cavity geometry, forming temperature and tooling.

Can PVC/PE/PVDC seal to aluminum foil?

It can be used with compatible pharmaceutical lidding systems, but seal performance depends on the exposed forming-web surface, aluminum-foil heat-seal lacquer and the sealing temperature, pressure and dwell time. The actual materials should be tested together.

Can PVC/PE/PVDC be used for tablets and capsules?

Yes, it can be evaluated for tablet and capsule blister packaging when the selected structure satisfies the drug's moisture, oxygen, forming, compatibility and stability requirements.

Can PVC/PE/PVDC be used for soft gels?

It can be evaluated for selected soft-gel packages where larger cavities require both barrier and forming performance. Product compatibility and stability should be confirmed before commercial use.

Is PVC/PE/PVDC an ultra-high-barrier material?

It can provide high moisture and oxygen barrier, but “ultra-high barrier” should be defined using measurable WVTR and OTR values. Extremely sensitive products may require comparison with super-high-barrier PVDC, PCTFE or cold-form aluminum.

Does thermoforming affect barrier performance?

Yes. Thermoforming stretches the material and can reduce layer thickness at cavity walls and corners. Critical projects should evaluate the actual formed blister rather than only the flat-film specification.

Can PVC/PE/PVDC run on rotary and flat-bed blister machines?

Suitable structures can be evaluated on both systems, but forming conditions differ. Buyers should provide the exact blister-machine model and run production trials before commercial qualification.

Does high-barrier PVC/PE/PVDC guarantee a longer drug shelf life?

No packaging material independently guarantees a specific shelf life. PVC/PE/PVDC can reduce moisture and oxygen exposure, but expiry dating must be established through the pharmaceutical manufacturer's validated stability program using the complete packaging system.

Should I test a sample before ordering commercial quantities?

Yes. Buyers should test thermoforming, cavity quality, sealing, roll performance, interlayer adhesion and relevant barrier requirements on the intended packaging line before approving bulk production.

Choose PVC/PE/PVDC From the Drug and Blister Design Requirements

PVC/PE/PVDC triplex film is valuable because it combines three different functions: PVC provides thermoforming support, PE contributes flexibility and processing performance, and PVDC provides the primary moisture and oxygen barrier.

The correct pharmaceutical packaging structure should therefore be chosen from measurable requirements rather than terms such as “TOP-grade” or “maximum barrier.”

Provide Wallis with your target WVTR and OTR, total thickness, PVDC coating weight, cavity drawing, blister-machine model, lidding foil, roll width, destination market and expected quantity to discuss suitable samples and customized production.