The caps cover a decisive role in preserving quality and are the main interface between product and consumers
The pre-threaded plastic cap is the most commonly used method for hermetically sealing PET bottles upon completion of the filling cycle. The pre-threaded caps in plastic are obtained by means of injection moulding of PVC, HDPE and other plastic materials. They are normally supplied with a tamper evident seal that stays on the cap once the closure is opened for the first time.
We offer a number of caps with different diameters; the diameters most frequently used are 28mm for sparkling beverages and 38mm for non-sparkling beverages. Depending on the number of threads, the cap is either single-threaded, double-threaded or triple-threaded.
The perfect sealing between cap and bottle neck is a fundamental target for the success of the entire aseptic filling process, whereas the inviolability represents a requirement, above all in the low-acid aseptic field. For this reason the analysis of cap performances represents an important step in the design stages of the container for aseptic applications.