Bag Making Process Explained: How to Form Three-Side Sealing, Four-Side Sealing, and Eight-Side Sealing Bags
In the soft packaging production chain, the bag-making process is the final step that determines the appearance, sealing reliability, and user experience of the finished product. The same roll of composite film can become three-sided sealed bags, four-sided sealed bags, or eight-sided sealed bags through different slitting, heat sealing, and forming methods, resulting in significant differences in performance and application scenarios. This article, from the perspective of factory frontline operations, clearly explains the principles, key parameters, and forming methods of…
