Method for incrementally stretching zero strain stretch laminate web in a non-uniform manner to impart a varying degree and apparatus for making the same

摘要

A substantially untensioned elongatable elastomeric ply (4a) is intermittently secured to a substantially untensioned ply elongatable continuous polymeric web (5), whereby said first elastomeric ply exhibits greater elastic recovery if compared with that one of the elongatable continuous polymeric web (5) ply, whereupon so formed sandwich part (1) is fed between a pair of opposed pressure applicators having corrugated surfaces which are complementary and which can be caused to mesh to a varying degree with one another along their points of contact. By subjecting the sandwich part (1) located between said opposed corrugated surfaces of said pressure applicators to non-uniform incremental stretching by causing said corrugated surfaces of said pressure applicators to mesh with one another to a varying degree along their points of contact, the sandwich part (1) is non-uniformly incrementally stretched so that it is non-uniformly elastically extensible in the direction of initial stretching