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What are the manufacturing processes for square valve bags?
The manufacturing process for square valve bags centers on square-bottom forming and valve mouth processing, accommodating various substrates like all-paper or paper-plastic composites. It comprises four main stages: raw material pretreatment, core forming, valve mouth fabrication, and final shaping. Primary forming techniques include gluing the bottom and heat sealing, complemented by standardized processes like creasing, folding, and cutting. This process meets the load-bearing and sealing requirements for 25-50kg industrial packaging.
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2026
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The square valve bag is a mainstream automated filling and packaging container in industrial applications. Named for its regular square base and specialized valve opening, it is also commonly referred to as a square-bottom valve bag or paste bag.
05
2026
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