Packaging Seal Integrity Testing with Different Methods

A crucial aspect of effective packaging is the integrity of its seals. Several methods exist to test seal integrity, each suited for different package types and testing needs. These methods broadly fall into three categories: positive pressure, negative pressure (vacuum), and non-destructive testing. Positive pressure, negative pressure, and non-destructive methods each have their strengths and are suited to different types of packages and testing scenarios.

Positive Pressure method increases internal pressure within the package to detect leaks. This method is best for testing packages that need to withstand internal pressure, like sealed pouches, bags, and some rigid containers. It's good for detecting larger leaks and weaknesses in seals. Common techniques include burst testing, where the pressure is increased until the package fails, and bubble testing, where the package is submerged in water.

Labthink C660M Leak and Seal Strength Tester is professionally applicable to quantitative determination of seal strength, seal quality, burst pressure, seal integrity, compression resistance, torsion force and joint/disengaging force of various flexible packages, aseptic packages, plastic tamper-evident closures, flexible tubes, caps and other materials. This instrument adopts positive pressure method. It offers multiple test modes including burst test, creep test, creep-to-failure test and pressure retaining test

In Negative Pressure (Vacuum) method, a vacuum is created around the package, and the package is observed for changes, such as expansion or air bubbles escaping from within. It's particularly effective for detecting small leaks and weaknesses in flexible packages, such as pouches, sachets, and flow wraps.

Labthink C660B Leak and Seal Strength Tester is professionally designed for the leakage tests of packages for food, drugs, medical instruments, household chemical products, cars, electronic components, stationeries and other industrial products. The instrument also can be used to test seal performance of specimens after falling and compression tests. This instrument adopts negative pressure method. It offers multiple test modes including standard, multi-grade vacuum and methylthionine chloride mode.

Non-Destructive Testing methods assess seal integrity without damaging the package, allowing for testing of finished products without waste. It is useful for high-value products where destructive testing is not feasible.

Labthink C690H Nondestructive Package Leak Detector is based on the testing principle of the vacuum decay method, designed and manufactured according to ASTM F2338 and other standards. It is professionally suitable for batch sealing leak detection of vials, and trace leakage detection of ampoule, cartridge bottles, infusion bottles, prefilled syringes and other pharmaceutical packaging.

Choosing the appropriate testing method depends on factors like package type (rigid or flexible), product type (solid, liquid, or powder), required leak sensitivity, and the testing environment (lab or production line). By employing the correct testing methods, manufacturers can ensure product safety, extend shelf life, and maintain consumer trust. Often, a combination of methods is used to provide the most comprehensive quality assurance.

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