Food & Beverage
Advanced solutions for sealing and closing glass containers.
Plastisol-based compounds for sealing glass containers.
Glass bottles are normally closed using specially designed metal caps, while sealing is ensured by gaskets placed between the glass and the metal. These gaskets are generally formed inside the cap using a specific type of plastisol (compound) and constitute an integral part of the cap itself. The structure of the compound in its final state can be cellular (foamed) or solid (non-foamed); both configurations are achieved during the application cycle, particularly in the final “curing” phase. Typically, an appropriate primer is required to allow the compound to adhere perfectly to the inner surface of the cap and ensure its sealing properties. Compounds used in this sector are classified according to the type of closure. For all applications, careful selection of raw materials is essential, not only to guarantee complete safety and non-toxicity but also to prevent any transfer of taste to the liquids in contact.
Crown Caps
For crown caps, compounds with a generally foamed structure obtained during the fusion phase are used, providing excellent sealing both under normal conditions and after pasteurization. Different application methods require the use of specific products.
Compounds for Aluminum Roll-On / Pilfer Proof Capsules
These are screw caps, with threading formed during bottle closure by specialized machines equipped with dedicated rollers. The security of these caps is ensured by a ring connected to the body of the cap via small bridges in the aluminum sheet. During opening, the ring deforms around the bottle neck and detaches from the rest of the cap when the small bridges break, clearly indicating tampering. The compound, placed on the inner bottom of the capsule as a gasket, must provide high sealing performance while maintaining low unscrewing torque (less than 8 kg·cm).
