ASTM F 88 covers the measurement of the strength of seals in flexible barrier materials. The test measures the force needed to separate a test strip of the. Seal Strength ASTM F Ultimate Seal Strength of Thermoplastics ASTM F Scope: Seal strength is the tensile strength of the seal at ambient temperature. ISO , Annex B. – Seal Strength. • ASTM F88 – Standard test method for seal strength of flexible barrier materials. • ASTM F – Standard test method.
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Standards can be obtained from appropriate standard authorities. Work Item s – proposed revisions of this standard. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ASTM F88 allows for three different sample widths. Align the specimen in the grips so that the seal line is perpendicular to the direction of pull.
It is the maximum force required to separate the two layers of a seal under particular conditions. A portion of the force measured to open the seal may as a result of bending forces.
Seal strength is not only relevant to opening force and package integrity, but to measuring the packaging processes’ ability to produce consistent seals. The maximum tensile force required to separate the two ends of the seal is recorded. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Adjust the testing machine to a constant rate of jaw separation.
Manual Vise Grips Pneumatic Grips. Link to Active This link will always route to the current Active version of the standard. Refer to the ASTM specification for conforming test rates. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
Certification Formally confirming that your products and services meet all trusted external and internal standards. When the sample is loaded in the grips, make sure slack remains in the specimen. Need help or have a question? Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
Maximum Force per Unit Width Identify the mode of specimen failure If significant peeling within the seal area occurs, calculate Average Seal Strength. Pull the sample until separation occurs. Because each technique will produce different axtm, it is important that the same technique is used for all tests in the same batch and noted in the report.
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Unsupported— Each tail of the specimen is secured in opposing grips and the seal remains unsupported while the test is being conducted. Properties of interest are the maximum seal force and in some cases the average force to open the seal.
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Supported by Hand 90deg; C: Thus, three techniques A: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Work with us to find the right equipment for your ASTM standard. Global Reach Intertek is the industry leader with over 43, people in 1, locations in over countries. A number of fixtures and techniques have been devised to hold samples at various angles to the pull direction to control this bending force.
Auditing Consulting Sourcing Training. This curve is called the seal curve. At a certain temperatures a seal force level is reached which is related to the maximum tensile force of asmt film. Send us a request Wilton UK: Sales Support Calibration Calculators. Combining values from the two systems may result in non-conformance with the standard.
Supported deg have been devised to hold the samples at various angles to help control the bending forces. Because the effect of each of these on test results is varied, consistent use of one technique Technique A, Technique B, or Technique C throughout a test series is recommended.
Historical Version s – view previous versions of standard. Each tail of the sealed specimen is secured in the opposing grips of a universal test bench.
Use a sample cutter to cut the test specimens to size. ASTM F88 seal strength is not only relevant to opening force and package integrity but to measuring the processes ability to produce consistent seals.