ASTM F88, Seal Strength of Flexible Barrier Materials

Seal strength, determined by ASTM F88, is a quantitative measure used in process validation, process control and capability. It is relevant to the opening force, package integrity and packaging processes. Seal strength is a necessary package requirement. ASTM F88 is popular for testing medical packaging. Read more about ASTM F88 below.

Last Updated: April 2nd, 2023 First Published :


Seal Strength of Flexible Barrier Materials ASTM F88


The ASTM F88 method covers the measurement of the strength of seals in flexible barrier materials. It is conducted on seals between a flexible material and a rigid material. Seals tested may be from any source, laboratory or commercial. ASTM F88 measures the force required to separate a test strip of material containing the seal.

FIG. 1 Tail Holding Methods

Test Procedure:

The maximum seal force and average force to open the seal are calculated in ASTM F88 and are reported. A portion of the force is measured while testing materials using a bending component.

A number of fixtures and techniques have been devised to hold samples at various angles to the pull direction to control this bending force. Because the effect of each of these on test results is varied, consistent use of one technique (unsupported, supported 90° by hand, or supported 180°) is recommended throughout the process.

Sample size:

ASTM F88 covers the measurement of the strength of seals in flexible barrier materials. It is
conducted on seals between a flexible material and a rigid material.


The values in ASTM F88 are standardly stated in either SI units or inch-pound. These values
stated in each system may not be exact equivalents; therefore, each system shall be used
independently of the other.

Need help or have a question?
Case Study In-depth examination of genuine material testing solutions
Dopant and ultra-low concentration elemental analysis using Scanning…

EELS analysis of gate and channel is performed on fin field-effect transistors (finFETs). Scanning transmission electron…

Learn More
Analysis of degradation of PVC pipe using Fourier…

FTIR analysis is used to study the migration and leaching of phthalate plasticizers from p-PVCs. Phthalate…

Learn More
Nano-scale roughness measurement of Si-wafers by Atomic Force…

Nano-scale surface roughness is a critical parameter in fabricated thin-films that are used in optics, solar…

Learn More
See all Case Study

Looking for Material Testing?

We have already delivered 10000+ Material Test results to top companies

    Free Consultation? - Talk to our experts

    (888) 878-3090

    Send us a request

      Process for testing
        STEP 01

        You share material and testing requirements with us

        STEP 02

        You ship your sample to us or arrange for us to pick it up.

        STEP 03

        We deliver the test report to your email.

        Let’s work together!

        Share your testing requirements with us and we will be happy to assist you.

        ddd Just share your testing requirements and leave the rest on us!
        • Quick Turnaround and Hasslefree process
        • Confidentiality Guarantee
        • Free, No-obligation Consultation
        • 100% Customer Satisfaction


          Let us combine our capabilities to achieve success!!