Bottles and containers are used across a wide range of industries, including food and beverage, pharmaceutical, personal care and chemical applications. Their barrier properties can help protect the contents from oxygen, moisture and other gases, depending on the packaging material and design.
Permeability testing for bottles and containers helps manufacturers and laboratories characterize packaging barrier performance, compare materials and support product development and quality control.
The appropriate test depends on the container material, its structure, the substance being measured and the available test configuration. ExtraSolution provides solutions for measuring oxygen, water vapor and carbon dioxide transmission through films and barrier materials. For rigid containers, compatibility with the selected instrument and accessories should be confirmed before testing.
Why Measure the Permeability of Bottles and Containers?
The barrier performance of a bottle or container depends on the materials used, the design of the packaging and the intended application.
Measuring gas and water vapor transmission can help manufacturers and laboratories:
- Characterize the barrier properties of packaging materials.
- Compare alternative materials and container designs.
- Support packaging development and material selection.
- Evaluate changes in material composition or manufacturing processes.
- Monitor material performance during quality control.
- Obtain measurement data under defined test conditions.
The relevant parameters and test conditions depend on the product being packaged and the substances that need to be controlled.
Which Barrier Parameters Should Be Evaluated?
The appropriate transmission parameter depends on the packaging application and its barrier requirements.
Oxygen Transmission Rate (OTR)
OTR measures the rate at which oxygen passes through a material under specified test conditions. It is relevant when evaluating packaging materials intended to limit oxygen transmission.
OTR measurements can help compare the oxygen barrier performance of different materials. They may be particularly useful when oxygen sensitivity is an important consideration for the packaged product.
Learn more about Oxygen Permeability and OTR: Measurement and Analysis.
Water Vapor Transmission Rate (WVTR)
WVTR measures the rate at which water vapor passes through a material under specified test conditions. It is relevant for applications where moisture transfer needs to be characterized.
WVTR testing can help compare the moisture barrier performance of different packaging materials and evaluate their behavior under defined temperature and humidity conditions.
Learn more about Water Vapor Permeability and WVTR: Measurement and Analysis.
Carbon Dioxide Transmission Rate (CO₂TR)
CO₂TR measures the transmission of carbon dioxide through a material under specified test conditions. It may be relevant when carbon dioxide exchange is an important consideration for a packaging application.
Measuring CO₂TR can help characterize and compare the carbon dioxide barrier properties of suitable materials.
Learn more about CO₂ Permeability and CO₂TR: Measurement and Analysis.
Which Bottle and Container Materials Can Be Evaluated?
Bottles and containers are manufactured from a variety of materials, each with different characteristics. Depending on the material, sample geometry, test method and instrument configuration, relevant packaging materials may include:
- Plastic materials such as PET, HDPE and PP.
- Glass packaging.
- Metal packaging.
- Rigid and flexible polymer structures.
- Composite packaging materials.
- Coated or multilayer barrier materials.
- Not all materials or container geometries can be tested using the same method or instrument configuration. The suitability of a specific sample must be confirmed before selecting a testing solution.
For certain applications, testing a representative material sample may be appropriate. For others, the objective may be to evaluate the complete container. These approaches are not interchangeable: the test setup must reflect the property being investigated.
What Influences the Barrier Performance of Bottles and Containers?
Several factors can influence gas and water vapor transmission through packaging materials.
Material Composition
Different polymers, glass, metals, coatings and composite structures have different barrier characteristics. Material selection should reflect the requirements of the intended application.
Wall Thickness and Structure
The thickness and structure of a packaging wall can affect transmission behavior. For multilayer or composite materials, the overall barrier performance depends on the complete structure.
Container Design
The shape and geometry of a container may affect how a test can be performed. Closures, joints and other packaging components may also be relevant when evaluating the performance of a complete packaging system.
The measurement method should clearly define whether the objective is to characterize the packaging material itself or the assembled container, including its closure.
Temperature and Relative Humidity
Temperature and relative humidity can influence transmission measurements. This is particularly important when evaluating water vapor transmission or comparing materials under different environmental conditions.
Intended Application
The required barrier properties depend on the packaged product, its sensitivity to oxygen or moisture, and the intended storage and distribution conditions.
Defining these factors helps determine which transmission parameters and test conditions are appropriate.
How Is Permeability Measured in Bottles and Containers?
Permeability testing evaluates the transmission of a selected gas or water vapor through a material under defined conditions. The procedure depends on the parameter being measured and the characteristics of the sample.
When planning a test, laboratories should consider:
- The parameter required: OTR, WVTR, CO₂TR or a combination of parameters.
- Material and sample geometry: confirm compatibility with the selected test method.
- Test configuration: establish whether the measurement concerns a material sample or the complete container.
- Environmental conditions: define the required temperature and relative humidity.
- Sample preparation: follow the requirements of the selected method.
- Measurement range: verify that the instrument is suitable for the expected transmission values.
- Repeatability and documentation: apply consistent conditions when comparing materials or monitoring changes.
Testing a flat material sample does not automatically provide a direct measurement of the performance of a complete bottle or container. The test configuration must be appropriate for the intended evaluation.
How to Choose a Permeability Tester for Bottles and Containers
Selecting a suitable instrument begins with a clear definition of the application and the required measurement.
Consider the following factors before choosing a testing system:
- Measurement capabilities: identify whether oxygen, water vapor, carbon dioxide or multiple parameters need to be evaluated.
- Material compatibility: confirm that the instrument can test the specific material under consideration.
- Sample format: establish whether the sample is a flat film, a material specimen or a complete container.
- Test conditions: determine the required temperature and relative humidity.
- Measurement range and test method: verify that the system is appropriate for the expected transmission values and intended procedure.
- Laboratory workflow: consider sample throughput, reporting requirements and how results will be compared.
If the application requires testing complete rigid containers, confirm the availability and suitability of the necessary instrument configuration and accessories with the supplier before making a selection.
ExtraSolution Solutions for Permeability Testing
ExtraSolution offers solutions for measuring oxygen, water vapor and carbon dioxide transmission through films and barrier materials. The most suitable instrument depends on the measurement parameters, sample characteristics and required test configuration.
MultiPerm O2-CO2
Designed for oxygen transmission rate (OTR) and carbon dioxide transmission rate (CO₂TR) measurements.
Explore MultiPerm O2-CO2.
MultiPerm O2-H2O
Designed for oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) measurements.
Explore MultiPerm O2-H2O.
MultiPerm H2O-CO2
Designed for water vapor transmission rate (WVTR) and carbon dioxide transmission rate (CO₂TR) measurements.
Explore MultiPerm H2O-CO2.
TotalPerm
Combines OTR, CO₂TR and WVTR measurement capabilities in one integrated system.
Explore TotalPerm.
PermeH2O
Provides a dedicated solution for water vapor transmission rate (WVTR) measurement.
Explore PermeH2O.
These product descriptions refer to their respective transmission measurement capabilities. Suitability for a specific bottle, rigid container or complete packaging system must be confirmed with ExtraSolution, based on the model, available accessories, sample geometry and test method.
Discuss Your Bottle and Container Testing Requirements with ExtraSolution
Characterizing packaging barrier properties can support material selection, product development and quality control. Choosing the appropriate test requires a clear understanding of the packaging material, the parameter to be measured and the intended test configuration.
ExtraSolution provides solutions for measuring oxygen, water vapor and carbon dioxide transmission through films and barrier materials.
Contact ExtraSolution to discuss your application, confirm sample compatibility and identify a suitable testing solution.