ASTM F88 Seal Strength of Flexible Barrier Materials

This method is widely used for flexible packaging materials such as sterile medical devices, pharmaceutical products, food packaging, and consumer goods. ASTM F88 helps manufacturers ensure product quality and performance, optimize sealing processes, compare packaging materials, and verify seal quality. ASTM F88/F88M describes three specimen testing techniques: Technique A (Unsupported), Technique B (Supported 90°), and Technique C (Supported 180°). The appropriate technique is selected based on the package design and the objective of the seal strength evaluation.

Get Certified ASTM F88 Testing for Reliable Flexible Packaging Seal Integrity

Testing performed in accordance with ASTM F88/F88M demonstrates that seal strength has been evaluated using standardized laboratory procedures. Laboratory testing is a process used to test for seal integrity, peel strength, and packaging performance under controlled conditions. 

• Measures the seal strength of heat-sealed flexible barrier materials.
• Evaluates the seal strength of heat-sealed pouches, bags, sachets, wraps, and other flexible barrier materials.
• Measures the peel strength and seal integrity.
• Supports package validation and quality assurance activities.
• Can be used for food, pharmaceutical, medical device, and other flexible packaging applications.
• Suggests a consistent way of comparing the performance of packaging seals. 

What are the uses of ASTM F88 Testing?

ASTM F88 testing is useful for packaging manufacturers, medical device companies, pharmaceutical producers, and food packaging laboratories to assess the mechanical integrity of package seals prior to product distribution to consumers. The results are used for the validation of the material, for quality assurance and product development, and for optimizing the manufacturing process. Common applications include:

• ASTM F88 testing measures seal strength, and the results may be used to help evaluate package performance during handling, storage, and transportation. Manufacturers refer to the results to verify that packaging is of a quality that is consistent with quality and regulatory standards.
• Medical device manufacturers use the ASTM F88 test to ensure that seals are not compromised during the sterilization, shipping, and storage process. The integrity of a seal is critical to the sterility of medical devices until it is opened.
• ASTM F88 testing is utilized to assess blister packs, sachets, pouches, and medical packaging materials made by pharmaceutical manufacturers. Uniform seal strength provides pharmaceutical products with protection against contamination and exposure to the environment.
• Used by packaging research laboratories to compare packaging materials, optimize the heat-sealing parameters, and test new packaging technologies. 

What Materials Can Be Tested Under ASTM F88?

ASTM F88 can be used for a wide variety of heat-sealable flexible packaging materials. Examples of common materials are polyethylene films, polypropylene films, polyester laminates, aluminum foil laminates, multilayer packaging films, medical-grade plastics, Tyvek® packaging systems, sterile barrier materials, pharmaceutical pouches, food packaging films, flexible composite laminates, and other heat-sealable flexible barrier materials used in commercial packaging applications. 

Why is ASTM F88 Important for Flexible Packaging?

ASTM F88 is a standardized test method to assess the mechanical seal integrity of flexible packaging systems. Reliable seal strength testing ensures package performance, optimization of sealing processes, enhanced product safety, minimization of package failures, and compliance with industry regulations. Standardized testing can also help to validate packaging and compare the performance of different packaging materials and sealing conditions.

Common Challenges and Troubleshooting

The ASTM F88 testing can be affected by variations in the quality of the seal, the alignment of a specimen on the machine, rates of peel, damage to the specimen during preparation, errors in equipment calibration, and operator inconsistencies. Standardizing specimen preparation, sealing conditions, testing equipment, alignment, and trained laboratory personnel produce accurate, repeatable, and reliable measurements of seal strength.

ASTM F88 Testing Process and Data Collection

The testing procedure starts with the preparation of representative packaging specimens with a set of predetermined heat seals. The specimen is clamped in the testing machine, and the sealed layers are separated at a constant crosshead speed while the required force is continuously recorded. Force data and other required test parameters are recorded throughout the test and reported in accordance with ASTM F88/F88M.