What are the commonly used devices for testing the sealing performance of aluminum-plastic caps?
Release time:
Aug 02,2025
The commonly used equipment for testing the sealing performance of aluminum-plastic caps includes the following:
1. Sealing tester
1. Operating principle: By applying positive or negative pressure to the interior of the packaging container, different usage environments and storage conditions are simulated to detect any leakage in the packaging. The pressure level and holding time can be precisely controlled, and automated detection is performed according to preset parameters.
2. Features: Simple operation, fast detection speed, and accurate and reliable results. It can adapt to the detection needs of aluminum-plastic cap packaging containers of different specifications and shapes, and is widely used in packaging sealing performance testing in the food, pharmaceutical, cosmetics, and other industries.
II. Vacuum Decay Method Sealing Tester
1. Operating principle: Based on vacuum decay technology, the packaging container is placed in a vacuum environment. The sealing performance of the packaging is judged by detecting changes in vacuum degree. If there is a leak in the packaging, the vacuum degree will gradually decrease within a certain period of time. The instrument detects this change through a high-precision sensor and gives corresponding results.
2. Features: High detection accuracy, capable of detecting minor leaks. Strong adaptability to the shape and size of packaging containers, without requiring special fixtures and molds. Non-destructive detection can be achieved, without affecting the quality of the products inside the packaging.
III. Water bath leak tester
1. Operating principle: Immerse the packaging container completely in water and judge the sealing performance by observing whether bubbles emerge from the water or there is a pressure change. If there is a leak in the packaging, gas or liquid will escape from the packaging under the influence of pressure difference, forming bubbles in the water.
2. Features: Intuitive, simple, and low cost. It is suitable for various types of packaging containers, especially for irregularly shaped packaging, where it exhibits good detection performance. However, it is important to note that the water bath method may affect some water-sensitive products, which require drying after detection.
IV. Pressure Decay Method Seal Tester
1. Operating principle: Fill the packaging container with gas at a certain pressure, then close the gas source. The sealing performance is judged by detecting the pressure decay within a certain period of time. If the packaging is well sealed, the pressure decay will be very slow; if there is a leak, the pressure will decrease rapidly.
2. Features: Fast detection speed and high accuracy. It can be applied to packaging inspection across various pressure ranges, and holds significant detection value for packaging that needs to be used in high or low pressure environments.
Address: Room 1108, Financial Building, Laishan District, Yantai City, Shandong Province, China
Postal Code: 264003
Telephone: +86-13697862157
WhatsApp：8613697862157
Fax: 0086-535-4662190
Email: lpgm06@lp.com.cn