Structural Composition and Performance Characteristics of Side-Pull Ring Beer Caps


Release Time:

Nov 07,2025

Author:Shuangying Packaging

Side-pull ring beer caps are easy-open caps used for beer packaging, named for their pull tabs located on the side of the cap. They feature convenient opening and excellent sealing properties.

Side-pull ring beer caps are easy-open caps used for beer packaging, named for their pull tabs located on the side of the cap. They feature convenient opening and excellent sealing properties.
Below is a detailed introduction:
Structure: Typically composed of three parts—the cap body, PE gasket, and plastic pull tab. The cap body is generally made of thin metal sheets like aluminum alloy. The pull tab primarily uses high-density polyethylene pellets, while the gasket seals the bottle opening to prevent beer leakage.
Performance Characteristics: Side-pull beer caps can be easily opened without tools. Hold the cap body with one hand and firmly pull the tab with the other. The cap opens along the scored line and detaches from the bottle. It maintains excellent sealing integrity, withstanding pressurization up to 650 kPa for 1 minute without leakage. Additionally, its opening force meets specific standards: the initial opening step (90° rotation) requires no more than 30N, while the second opening step (210° rotation) requires no more than 38N.
Advantages: Compared to traditional crown caps, side-pull beer caps enable one-handed opening without tools, allowing immediate consumption for a smoother experience and eliminating the need for bottle openers. Their precision manufacturing enhances sealing performance, ensuring beer freshness from production to consumption while reducing oxidation-induced “flat” taste.
Application: As consumer demand for drinking convenience grows, the use of side-pull ring beer caps has surged significantly. Many leading beer companies now offer products featuring this cap design.

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