Crucial Seal Integrity Tests for Optimizing Package Design and Manufacturing Processes

The effectiveness of flexible packaging relies heavily on its sealability. Leaks can compromise the barrier properties of the packaging material, leading to product spoilage due to gas or liquid permeation. However, the specific sealability requirements vary depending on the packaging style. For instance, heat-sealed packages are susceptible to leaks at the seal edges, necessitating tests that evaluate heat seal strength, quality, and burst pressure. In contrast, pilfer-proof closures require assessments of cap integrity, torsional airproof index, and cap joint/disengaging strength.

General sealability testing involve pressurizing the package interior to create a pressure differential between the inside and outside environments. This approach can be implemented using either positive pressure (air inflation) or negative pressure (vacuum).

Labthink C660M Leak and Seal Strength Tester is designed base on the positive pressure test methods, it is applicable to quantitative determination of seal strength, seal quality, burst pressure and seal integrity, as well as compression resistance, torsion force and joint/disengaging force of various flexible packages, aseptic packages, plastic tamper-evident closures, flexible tubes, caps and other materials. It offers targeted testing through the use of restraining plates for heat seal edges and specialized accessories for open packages.

• žBurst Test: This method measures the maximum pressure a package can withstand before bursting by steadily inflating it with air.
• Creep Test: The package is pressurized for a predetermined time period. Packages that do not leak during this period are considered to have passed the test.
• Creep to Failure: Similar to the creep test, but with a higher pressure applied until the package leaks. This test determines the time it takes for the package to fail under pressure.

C660M can accommodate both open and closed flexible packages. Closed packages, typically with complete seals and strong heat seal edges, require a circular hole to be created for probe insertion. The recommended opening position is the center of the bag. Open packages, such as three-sided sealed bags or shopping bags, necessitate specialized accessories to evaluate the seal integrity of the sealed sides. Labthink C660M offers such accessories for open package testing, which can be further enhanced by combining them with restraining plates for heat seal edge evaluation.

Labthink C660M Leak and Seal Strength Tester comprehensive and systematic approach to sealability testing for various flexible packaging materials. It facilitates the identification of weak points and allows for targeted improvements in heat seal layer material thickness, film burst resistance, and relevant heat seal parameters. The C660M versatility extends beyond sealability testing, enabling the integration of other methods to assess package content integrity and seal consistency.

As the demand for functional packaging materials grows, testing methods are evolving to ensure a more comprehensive evaluation of packaging films. Labthink encourages collaboration with packaging industry companies for quality control! Visit the website www.labthink.com to learn more!