АСТМ Ф2054

Standard Test Method for Burst Testing of Flexible Package Seals Using Internal Air Pressurization Within Restraining Plates
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Стандард Суммари

ASTM F2054 is a critical standard that outlines the methodology for burst testing of flexible package seals. This method utilizes internal air pressurization within restraining plates to evaluate the burst strength of packaging seals. Understanding the burst seal strength is vital for manufacturers to ensure the integrity and safety of their products during transportation and storage. The testing process provides valuable data that helps in optimizing packaging design and materials.

Restraining Plates for Open Pack
Restraining Plates for Open Pack

ASTM F2054 Description

ASTM F2054 describes the procedure for determining the minimum burst strength of a seal placed around the perimeter of a flexible package as it is internally pressurized and enclosed within restraining plates until failure occurs. The test aims to determine the burst strength of the package seals, indicating their ability to withstand internal pressure without rupturing.

Why using restraining plates?

The burst test internally and increasingly pressurizes a package until an area of the package seal around the perimeter “bursts” open in response to pressurization. By placing the package within restraining plates during pressurization, the dimensional stability of the package is maintained in a manner that results in stresses applied more uniformly along the perimeter of the package, where seals are normally placed. This allows the test to have a higher probability of detecting the weakest area of the seal and provide a measurement of the pressure required to “burst” open the package.

ASTM D2054 Restraining Plates
ASTM D2054 Restraining Plates

What type of package is suitable to be restrained?

ASTM F2054 burst testing within restraining plates applies to flexible packages with seals placed around the perimeter of a flexible package (often referred to as a pouch). In particular, it is intended as applicable to packages with seals that have a peelable seal feature (peeled open by the end-user to remove contents of the package).

What are restraining plates in ASTM F2054?

Restraining plate refers to plates that are rigid in nature and configured to contact and limit the packages expandable surface area as the package is pressurized

LSST-01 Leak and Seal Strength Tester with Restraining Plates
LSST-01 Leak and Seal Strength Tester with Restraining Plates

Open-Package Restrained Test

Open-package test fixtures are used to test flexible packages with one of the four sides of the package open (nonsealed). The package is pressurized with an inflation nozzle and pressure sensing mechanism inserted into the open end of the package. The open end then is sealed by a clamping mechanism for the duration of the test.

Restraining Plates, Open Package Configuration
  • 1. Mount the Sample: Insert the package in a manner in which the body of the package is enclosed between the restraining plates. Place the package between the restraining plates in a manner which minimizes the unrestrained areas of the package during the test.
  • 2. Get Ready for Pressurization: Insert or place the pressurization and sensor nozzle inside the open end of the package. Close the clamping mechanism to produce an air tight seal around the open end of the package including the area around the pressurization and sensor nozzle.
  • 3. Inflation and Results: Begin test by initiating inflation process. Continue pressurization until a failure occurs. A failure in this context is when an area of the package ruptures (bursts) as the result of pressurization.
  • 4. Examination: Visually examine the tested package and note the position and type of failure, as well as the pressure at which the failure occurred. If the failure occurred in an area other than the seal the test may be voided depending on the purpose of the investigation.

Closed-Package Restrained Test

Closed-package test fixtures are used to test packages with all four sides of the package sealed. The closed package tester internally pressurizes the package utilizing a pressure nozzle and sensing mechanism that is connected through a puncture in the package.

Restraining Plates, Closed Package Configuration
Restraining Plates, Closed Package Configuration
  • 1. Mount the Sample: Insert the body of the package within the restraining plates with the required plate gap dimension.
  • 2. Get Ready for Pressurization: Carefully insert the pressurization and sensor nozzle entry device, and affix to the package so as to create an air tight seal. The center of the package is the preferred point of entry and may be fixtured as an attachment to the restraining plates.
  • 3. Inflation and Results: Begin test by initiating inflation process. Continue pressurization until a failure occurs. A failure in this context is when an area of the package ruptures (bursts) as the result of pressurization. The rupture (burst) is detected by the LSST-01 Leak and Seal Strength Tester sensing mechanism as a rapid decrease in pressure within the body of the package, and the system records the pressure at rupture (burst).
  • 4. Examination: Visually examine the tested package and note the position and type of failure, as well as the pressure at which the failure occurred. If the failure occurred in an area other than the seal the test may be voided depending on the purpose of the investigation.

Опрема за тестирање

To perform ASTM F2054 effectively, the following equipment is recommended:

Cell Instruments LSST-01 Leak and Seal Strength Tester

This model is particularly well-suited for burst testing with restraining plates. It features precision controls for air pressure application and user-friendliness in operation.

ЛССТ-01 Систем за испитивање пропуштања и чврстоће заптивке

Кључне карактеристике

Restraining plates

Flexible restraining plates with different sizes and gaps, suitable for both open and closed package test.

Well Designed Fixtures

Both standard open package and closed packages are available. We can also customize the fixture according to requirement.

Friendly and Versatile Program

LSST-01 Leak and Seal Strength Tester can perform burst test, creep test, creep to failure test under restrained conditions.

Relationship to ASTM F1140

ASTM F2054 and ASTM F1140 are both essential standards in the realm of packaging testing, but they focus on different aspects:

 

  • Similarities: Both standards aim to assess the integrity of packaging materials under internal pressure or the pressure decay method.
  • Differences: ASTM F1140 focuses on leak testing and assessing seal integrity under pressure decay conditions under unrestrained conditions, while ASTM F2054 evaluates burst strength with samples restrained to see where is the weakest in seal. 

Significance of ISO ASTM F2054 Standard

ASTM F2054 plays a crucial role in the packaging industry for several key reasons:

Quality Control

It establishes industry standards for burst strength, ensuring flexible packaging maintains product integrity.

Consumer Safety

By confirming that packaging can withstand internal pressure, it helps protect consumers from hazards related to packaging failures.

Усклађеност са прописима

Compliance with ASTM F2054 is often required in various industries, aiding manufacturers in meeting safety regulations.

Material Optimization

The data obtained from burst testing allows manufacturers to enhance packaging materials and designs, improving performance and potentially reducing costs.

FAQ about ASTM F2054

ASTM F2054 utilizes restraining plates during burst testing, ensuring that stress is uniformly distributed across the package seal. This method enhances the accuracy of detecting weak points, as the pressure applied affects all areas of the seal equally. In contrast, ASTM F1140 does not use restraining plates, which can lead to uneven stress distribution—particularly concentrated in the middle of the pouch where inflation occurs. Consequently, ASTM F1140 may not reliably identify the weakest areas of the seal, potentially overlooking critical vulnerabilities in packaging integrity.

This standard applies to various flexible packages, including pouches, bags, and other sealable containers.

A failed burst test indicates that the package may not adequately protect its contents, leading to potential contamination, spoilage, or product loss.

Factors include the seal material, thickness, environmental conditions, and the method of seal application, seal parameters like seal time, pressure and seal temperature.

The LSST-01 offers precise pressure control and inclusive test programs of burst, creep, creep to failure test, to enable accurate measurement of sample performance.

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