Vented Aluminum Foil

Induction Seal Liner 
 

Our two-piece type VENTILCAP vented seal is made of aluminum foil with paperboard backing, when induction heating, the aluminum foil will separate from the backing and melt to the bottle, and the backing will remain in the cap as a secondary seal. For a perforated container lid, gas will pass through the microporous expanded polytetrafluoroethylene (ePTFE) gas-permeable membrane and escape through the pores in the container lid while preventing liquids and particles from entering the package. The microporous expanded polytetrafluoroethylene (ePTFE) gas permeable membrane prevents pressure build-up by continuously balancing the pressure differential between the interior of the vessel and the external environment. 
They prevent swelling that will occur due to expansion in the bottles they are used in and explosions that may occur as a result, and they also provide reliable high protection against leaks.
Aluminum foil induction liners are suitable for small-volume packaging (less than 5L), so it is widely used in the packaging of pesticides and liquid fertilizers.