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The leak-proof design of cosmetic bottle packaging is to prevent leakage of cosmetics during transportation, storage and use, keep the packaging clean, prevent product waste, and ensure user experience. Leak-proof design needs to take into account factors such as the structure, sealing performance and ease of use of the packaging to provide all-round protection.
Sealing structure: Cosmetic bottle packaging usually uses special sealing structures, such as threaded caps, flip caps, pressure caps, etc., to ensure that the packaging can form an effective seal when it is closed. The threaded cap is a common design. By rotating the cap, a tight connection is formed between the bottle mouth and the cap, effectively preventing the leakage of cosmetics.
Gasket: A gasket is often used in leak-proof designs. It is usually located on the inside of the cap and is tightly integrated with the bottle mouth to form a secondary seal. The sealing gasket can be made of rubber, silicone and other materials, which has good elasticity and corrosion resistance, and can effectively prevent the leakage of cosmetics.
Anti-leak valve: Some specially designed packaging, especially spray bottles and pump bottles, may be designed with anti-leak valves. The anti-leak valve uses a special structure to remain closed when not in use, preventing products from flowing out freely. The anti-leak valve opens, releasing the product, only when the user applies pressure or turns the switch.
Anti-extrusion design: Some packaging designs also take into account the possible extrusion pressure during transportation and storage. By increasing the structural strength of the packaging, selecting anti-extrusion materials, or adopting special anti-extrusion designs, the packaging can be effectively prevented from leaking when exposed to external forces.
Test standards: Leak-proof designs need to comply with relevant test standards to ensure their reliability. For example, pressure testing, shaking testing and other means can be used to simulate the use of packaging in different environments and evaluate its leak-proof performance. ISO standards also include some test methods related to leakage prevention performance.
