Appearance design
Metal Cap: usually refers to ordinary metal caps, whose shapes, edges and other designs are more diverse, and do not necessarily have a specific standard shape or structure. For example, some metal screw caps, flat caps, etc., may have flat edges, or may have some simple raised or recessed designs to facilitate opening or sealing.
Crown Cap: Also called crown cap, its edge is wavy, usually with 21 folds, and its shape is similar to a crown. This is a relatively unique and iconic appearance design with specific structure and size standards, commonly seen in the sealing caps of glass bottles.
Sealing method
Metal Cap: There are various sealing methods, depending on the specific design type. For example, the spiral metal cap is sealed by fitting with the container mouth through the thread and rotating and tightening; some press-type or bayonet metal caps are sealed by the tight fit or snap-on structure between the cap and the container mouth.
Crown Cap: Relying on special capping equipment to curl its edge and press it against the glass bottle mouth to form a tight seal. This sealing method has good sealing performance and can effectively prevent liquid leakage and outside air from entering. It is often used for beverage packaging with high sealing requirements, such as beer, carbonated beverages, etc.
Application scenarios
Metal Cap: It has a wide range of applications and can be used for various types of containers, including metal cans, glass bottles, plastic bottles, etc. Different types of metal caps are suitable for different products. For example, some high-end skin care products or pharmaceutical packaging may use exquisite metal screw caps, while some industrial containers may use simple metal flat caps or snap caps.
Crown Cap: It is mainly used for liquid products that need to be sealed and stored and have certain requirements for opening convenience, especially carbonated beverages such as beer and carbonated beverages. Because of its good sealing performance, it can withstand a certain internal pressure and is relatively easy to open (it can be easily opened with a bottle opener), it has been widely used in these fields. In addition, some young wines or sparkling wines that do not need to be aged for a long time will also use crown caps.
Opening method
Metal Cap: Depending on its type, the opening method varies. Screw caps are unscrewed by rotating; push-type or snap-on caps may need to be opened by pressing, prying or pulling. Some metal caps may also require the use of tools, such as special cap openers or wrenches, especially some metal caps with tight seals or used for large containers.
Crown Cap: Generally, you need to use a bottle opener to open it. Use the bottle opener's bayonet to clamp the edge of the crown cap, and then pry it hard to separate the edge of the cap from the bottle mouth. This opening method is more convenient, and bottle openers are also common tools in bars, restaurants and other places.
