The sealing performance of closed e-cigarettes is one of their core advantages, which directly affects the user experience and safety. The specific manifestations are as follows:
First, the impact of sealing performance on the user experience
Anti-oil leakage design: Closed electronic cigarettes achieve sealing by optimizing the structure of the e-liquid cartridge. For instance, a sealed cover design is adopted, and a sealing device is installed at the oil outlet of the e-liquid cavity to prevent oil leakage during transportation or use. Some products achieve static and dynamic sealing through O-rings to ensure that the e-liquid does not leak.
Air tightness testing: During the production process, air tightness testing instruments are used to test the cartridgers and oil tanks to ensure that the sealing performance meets the standards. For example, by inflating the product and monitoring the changes in air pressure, it can be determined whether there is a leakage.
Waterproof and dustproof: Electronic cigarettes with good sealing performance can prevent dust and liquids from entering the interior, thus extending their service life. The shells of some products are injection-molded with liquid silicone rubber to enhance sealing and anti-slip properties.
Second, the guarantee of safety by sealing performance
The raw materials are controllable: The cartridgers of closed electronic cigarettes are disposable consumables, and users cannot fill them with oil by themselves, thus avoiding health risks caused by the addition of unknown ingredients. For instance, in the United States, there have been cases of “popcorn lung” caused by users adding vitamin E acetate on their own, but the closed design can prevent such problems.
Stable parameters: The equipment parameters (such as voltage and power) are preset at the factory and cannot be adjusted by users, avoiding the release of harmful substances from the e-liquid due to improper parameters. For instance, high power may cause e-liquid to release harmful substances such as formaldehyde and carbon monoxide, while a closed design can avoid this risk.
Structural safety: Electronic cigarettes with good sealing performance can prevent battery short circuits or overheating and reduce the risk of explosion. For instance, the battery and e-liquid are isolated through a sealed design to prevent circuit failures caused by leakage.
Third, the technical realization of sealing performance
Sealing materials: O-ring rubber sealing rings, liquid silicone rubber and other materials are adopted to ensure the sealing between the cartridge and the equipment. For instance, the compression ratio and tensile amount of O-rings need to be precisely designed to balance the sealing performance and friction.
Structural design: The interior of the e-liquid cartridge adopts a multi-stage sealing structure, such as the coordination of the inner wall cavity, liquid outlet hole, pressure spring and other components, to ensure that the e-liquid does not leak. For example, the inner core and the inner wall cavity are in a tight fit and further sealed by a sealing cover.
Process control: During the production process, strict testing is carried out on the sealing performance. For instance, the smoke cartridts are inflated and pressurized through an air tightness tester, and the changes in air pressure are monitored to determine the sealing performance.