Airless bottles are typically constructed using a combination of materials to ensure their functionality and durability. The key components of airless bottles include:
Outer Shell: The outer shell of an airless bottle is usually made of plastic, glass, or acrylic. The choice of material depends on factors such as the desired aesthetics, the type of product it’s intended to hold, and brand preferences.
Inner Bag or Bladder: The inner component of an airless bottle, often referred to as the bag or bladder, is typically made of a flexible material such as polyethylene (PE) or polypropylene (PP). This bag is designed to collapse as the product is dispensed, creating a vacuum and preventing air from entering the bottle. It helps maintain the integrity of the product and ensures that the product is dispensed completely without leaving a residue.
Pump Mechanism: The pump mechanism of an airless bottle is made of various materials, including plastic, metal, and rubber components. It plays a crucial role in creating the vacuum and facilitating the controlled dispensing of the product.
Actuator and Nozzle: The actuator and nozzle, which are responsible for controlling the release of the product, are typically made of plastic. They may include components like a spring or valve to ensure precise and controlled dispensing.
Gaskets and Seals: Various gaskets, seals, and o-rings made from rubber or silicone are used in airless bottles to create airtight seals at critical points to prevent air from entering the bottle and maintain product integrity.
It’s essential to select materials that are compatible with the cosmetic product being packaged and that meet regulatory requirements for product safety and preservation. The choice of materials also influences the cost, aesthetics, and functionality of the airless bottle.
