ASTM F88/F88M-15
Standard Test Method for Seal Strength of Flexible Barrier Materials

Standard No.

ASTM F88/F88M-15

Release Date

2015

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM F88/F88M-21

Latest

ASTM F88/F88M-23

Scope

4.1 Seal strength is a quantitative measure for use in process validation, process control, and capability. Seal strength is not only relevant to opening force and package integrity, but to measuring the packaging processes' ability to produce consistent seals. Seal strength at some minimum level is a necessary package requirement, and at times it is desirable to limit the strength of the seal to facilitate opening.

4.1.1 The maximum seal force is important information, but for some applications, average force to open the seal may be useful, and in those cases also should be reported.

4.2 A portion of the force measured when testing materials may be a bending component and not seal strength alone. 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 (Technique A, Technique B, or Technique C) throughout a test series is recommended. Examples of fixtures and techniques are illustrated in Fig. 1.

4.2.1 Technique A: Unsupported—Each tail of the specimen is secured in opposing grips and the seal remains unsupported while the test is being conducted.

4.2.2 Technique B: Supported 90° (By Hand)—Each tail of the specimen is secured in opposing grips and the seal remains hand-supported at a 90° perpendicular angle to the tails while the test is being conducted.

4.2.3 Technique C: Supported 180°—The least flexible tail is supported flat against a rigid alignment plate held in one grip. The more flexible tail is folded 180° over the seal and is held in the opposing grip while the test is being conducted.

1.1 This test method covers the measurement of the strength of seals in flexible barrier materials.

1.2 The test may be conducted on seals between a flexible material and a rigid material.

1.3 Seals tested in accordance with this test method may be from any source, laboratory or commercial.

1.4 This test method measures the force required to separate a test strip of material containing the seal. It also identifies the mode of specimen failure.

1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.6 This standard does not purport to address all ......

ASTM F88/F88M-15 Referenced Document

• ASTM D882 Standard Test Method for Tensile Properties of Thin Plastic Sheeting
• ASTM E171 Standard Specification for Standard Atmospheres for Conditioning and Testing Flexible Barrier Materials
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM F88/F88M-15 history

• 2023 ASTM F88/F88M-23 Standard Test Method for Seal Strength of Flexible Barrier Materials
• 2021 ASTM F88/F88M-21 Standard Test Method for Seal Strength of Flexible Barrier Materials
• 2015 ASTM F88/F88M-15 Standard Test Method for Seal Strength of Flexible Barrier Materials
• 2009 ASTM F88/F88M-09 Standard Test Method for Seal Strength of Flexible Barrier Materials
• 2007 ASTM F88-07a Standard Test Method for Seal Strength of Flexible Barrier Materials
• 2007 ASTM F88-07 Standard Test Method for Seal Strength of Flexible Barrier Materials
• 2006 ASTM F88-06 Standard Test Method for Seal Strength of Flexible Barrier Materials
• 2005 ASTM F88-05 Standard Test Method for Seal Strength of Flexible Barrier Materials
• 2000 ASTM F88-00 Standard Test Method for Seal Strength of Flexible Barrier Materials