Cosmetic Tube Sealing Methods
Sealing is one of the most important steps in the tube filling process. After product is filled into a cosmetic tube, the open end must be sealed to protect the formulation and ensure the package remains airtight during shipping and storage.
Hot Air Sealing
(What We Use)
Different types of tubes require different sealing methods depending on the material used.
Plastic tubes are most commonly sealed using hot air sealing. This process heats the inside of the tube opening and presses the material together to create a strong, permanent seal.
Hot air sealing is widely used for cosmetic products packaged in polyethylene tubes.
Ultrasonic Sealing
Ultrasonic sealing is another method used for plastic and laminate tubes. Instead of heat, ultrasonic vibrations are used to melt the tube material and create a sealed closure. This process is precise and often used for specialty packaging applications.
Hot Jaw Tube Sealing
Hot Jaw tube sealing is a traditional tube sealing method that uses heated crimping jaws to apply heat and pressure to the outside of a tube. The heat travels through the tube material to soften the inner walls before the jaws compress the tube to create a seal.
Compared to modern tube sealing technologies, Hot Jaw sealing is less efficient because the heat must transfer from the outside inward, resulting in longer sealing times. It can also produce a less consistent and less professional seal appearance than advanced methods like hot air sealing or ultrasonic tube sealing.
