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U.S. Patent No. 10,702,425
September 11, 2020
By: Karen McIntyre
Editor
Mingda Yang, Zhejiang, China. Filed: 4/18/17 Issued: 7/7/20 A manufacturing method for an elastic air-permeable arc-shaped folded composite nonwoven fabric, wherein elastic macromolecular resin particles are cast into an elastic membrane or an elastic air-permeable membrane via an elastic macromolecular resin cast membrane head, the elastic membrane is exported via elastic air-permeable cast membrane forming roll sets (2-1, 2-2) to form an elastic punched air-permeable membrane (4) whose membrane surface is distributed with numerous air-permeable holes, the elastic punched air-permeable membrane (4) or the elastic air-permeable membrane is longitudinally stretched in an S shape via multiple pairs of elastic air-permeable membrane stretching roll sets and then enters compound forming roll sets (7-1, 7-2) together with an unstretched underlayer nonwoven fabric (8) and an unstretched face layer nonwoven fabric (6) located on two sides of the elastic punched air-permeable membrane (4) to be compounded by hot pressing and then exported, and then, the face layer nonwoven fabric (6) and the underlayer nonwoven fabric (8) located on two sides of the elastic punched air-permeable membrane (4) form the elastic arc-shaped folded side-leakage-proof nonwoven fabric with the rebound and reset of the elastic punched air-permeable membrane (4); or the elastic membrane is exported via elastic air-permeable cast membrane forming roll sets (2-1, 2-2) to form an elastic punched air-permeable membrane (4) whose membrane surface is distributed with numerous air-permeable holes, the elastic punched air-permeable membrane (4) or the elastic air-permeable membrane is longitudinally stretched in an S shape via multiple pairs of elastic air-permeable membrane stretching roll sets and then enters compound forming roll sets (7-1, 7-2) together with an unstretched underlayer nonwoven fabric (8) and an unstretched face layer nonwoven fabric (6) located on two sides of the elastic punched air-permeable membrane (4) to be compounded by hot pressing and then exported, and then, the face layer nonwoven fabric (6) and the underlayer nonwoven fabric (8) located on two sides of the elastic punched air-permeable membrane (4) form the elastic arc-shaped folded side-leakage-proof nonwoven fabric with the rebound and reset of the elastic punched air-permeable membrane (4).
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