Vacuum-sealed metal lid

Abstract

A vacuum-sealed metal lid primarily consists of a cover body (10) made of aluminum and a sealing ring (20) made of thermoplastic elastomer (TPE). The cover body (10) includes a vacuum button (12) capable of floating up and down, surrounded by multiple bending portions that form a three-dimensional structure at the top (11) of the metal lid. When no vacuum pressure is present, the vacuum button (12) assumes an upwardly arched convex shape. However, when a vacuum is formed inside the container, the vacuum button (12) takes on a downwardly arched concave shape, serving as an indicator of whether the container has been successfully sealed. The integration of the cover body (10) and the sealing ring (20) significantly enhances sealing performance. The sealing ring (20) made of TPE exhibits excellent elasticity and high-temperature resistance and ensures a tight and airtight fit around the container's opening to effectively prevent air from entering. Figure 1