Your Position：Home > News > Industry > What is the difference between Ropp and screw cap?
What is the difference between Ropp and screw cap?
Time：2025-03-21
The key difference between a ROPP (Roll-On Pilfer Proof) cap and a screw cap lies in their application method and design: ROPP caps are formed and sealed by rolling onto the bottle neck, while screw caps are pre-threaded and simply screwed on. Here's a more detailed breakdown: ROPP (Roll-On Pilfer Proof) Caps:
Application: ROPP caps are applied using a special capping machine that forms the threads and crimps the cap onto the bottle neck, creating a tamper-evident seal. Design: These caps are typically made of aluminum and have a straight-sided, unthreaded shell with a breakaway perforation and a gasket for a tight seal.
Purpose: ROPP caps are commonly used for alcoholic beverages, especially wine and spirits, where tamper-resistance is crucial. Mechanism: The cap is rolled onto the bottle neck, and the crimping process creates the threads and a tamper-evident seal. Resealability: ROPP caps are designed to be resealable after the initial opening, allowing the cap to be unscrewed and re-sealed.
Screw Caps:
Application: Screw caps are pre-threaded and can be applied manually or with less specialized machinery. Design: These caps are typically made of metal or plastic and have a threaded skirt that screws onto the bottle neck. Purpose: Screw caps are suitable for a wide range of products, not just alcoholic beverages. Mechanism: The cap is simply screwed onto the bottle neck, creating a seal. Resealability: Screw caps are designed to be resealable after the initial opening, allowing the cap to be unscrewed and re-sealed.
