The crown cap is a versatile product that can be used for beverages such as beer, juice, sparkling water, etc.
Material: Tin plated steel plate (tinplate) or chrome plated steel plate. Provide structural strength and rigidity.
Feature: There are 21 standard folds on the edge. This number is an optimized result that provides the best opening and closing convenience and production stability while ensuring sealing. The inner side of the cover shell is usually coated with a very thin protective coating to prevent the reaction between the alcohol and the metal.
Sealing gasket (inner gasket) This is the core technology that directly determines the sealing performance and food safety. The specific material evolution is as follows: Traditional PVC gaskets: containing foamed PVC layer, with good sealing performance but environmental protection and potential migration risks, are being phased out.
Modern PE/PET gaskets: currently mainstream, using food grade polyethylene/polyester materials, safe, non-toxic, and environmentally friendly.High end coated gasket: Apply a layer of elastic food grade coating (such as epoxy based) directly on the inside of the cover shell. After opening, the bottle mouth is clean without any gasket residue, which can maintain the original flavor of the beer to the greatest extent possible, making it the preferred choice for craft beer.