Why did the perfectly sealed sauce bottle or milk powder can suddenly "get angry" and bulge? Is the product spoiled, or is it just having a "high-altitude reaction"? This article acts like a product doctor, teaching you how to diagnose the bulging yourself at home through "observation, listening, inquiry, and palpation," making it easy to decide whether to "save" or "discard". 

How to determine? First, observe the degree of swelling, then smell for any odor, and check the condition. If the swelling is severe, there is an unusual odor, or the liquid appears abnormal, discard it immediately and do not use it. 

How to handle? For swelling caused by pressure or slight fermentation, the product is generally safe to use as long as it is within the shelf life and shows no abnormalities. When opening, cover the bottle mouth with a towel and slowly release the pressure. 

How to prevent? 

Optimize production processes: Ensure the sterilization process (such as temperature and time) is scientifically effective to thoroughly eliminate microorganisms. 

Strict Sealing Control: Regularly calibrate the sealing equipment to ensure precise temperature, pressure, and time parameters for sealing. Maintain clean and dry bottle openings. 

Select packaging materials: Choose sealing films and bottle caps with good compatibility with the product's properties to avoid chemical reactions. 

Conduct stability testing: During the product development phase, simulate various transportation and storage environments (such as high altitude, high-low temperature cycles) to anticipate and resolve potential issues in advance. 

Bulging of the sealing film is a signal that may simply reflect the physical response of the packaging to external conditions, or it could serve as an early warning of internal product degradation. For consumers, learning to discern its causes is crucial; for producers, eliminating the root causes of bulging is key to ensuring quality and building trust. 

Leadtra Packaging, a professional manufacturer and global service provider specializing in aluminum foil sealing films, offers one-stop services for sealing films, sealing gaskets, and solutions. With on-site debugging, we address your sealing challenges and ensure your production cycle runs smoothly. If you are interested in our products or have any questions, please feel free to contact us.