Field Report | Manufacturing Precision at hfeoe.com
For a 202# (52mm) Tinplate Easy Open End, the consumer's first physical interaction with your brand happens in a split second. That satisfying "pop" followed by a smooth, consistent pull is the result of rigorous mechanical calibration. In our latest W4 quality audit, we examined why Scoring Residual is the single most important factor in this experience.
The "Score Line" on a 52mm lid is a microscopic groove where the metal is intentionally thinned. If the residual metal at the bottom of this groove is even 0.005mm too thick, the opening force (Pop Force) can exceed 35N—making it difficult for the elderly or children to open. Conversely, if it's too thin, the lid risks premature rupture during carbonation or high-pressure sterilization.
At Hongfeng, we’ve standardized our 202# production to a specific residual range that ensures:
The 202# diameter presents a unique challenge: the metal is stiffer in a smaller circle. We utilize T4/T5 Temper Tinplate specifically chosen for its elasticity. When combined with our high-speed lacquering process, the coating remains intact even at the score line's sharpest angle, preventing "feathering" or rust after the can is opened.
If you are experiencing tab-detachment (where the ring comes off but the lid stays shut), the issue is likely the rivet formation on your 202# ends. We recommend verifying the rivet diameter and ensuring it matches your seamer's chuck pressure. Our engineering team is available to assist with these technical alignments.
Optimize Your Packaging Performance
Request our 202# Technical Specification Sheet or custom samples for your production trials.