Aparato para perforar y estirar una trama que comprende dos rodillos contragiratorios engranados que forma una línea de agarre entre ellos, un primer rodillo cilíndrico tiene una pluralidad de dientes separados que se extiende hacia fuera de los bordes circunferenciales del rodillo, y un segundo rodillo cilíndrico con acanaladuras circunferenciales continuas; proceso; trama.

摘要

Apparatuses and processes for aperturing and stretching a web are disclosed. In one embodiment, the method involves feeding a web into a nip that is formed between at least one pair of intermeshing rolls. The first roll is a raised ridge rotary knife aperturing roll and the second roll is a ring roll; both rolls comprise ridges and grooves. The first roll comprises a plurality of spaced-apart teeth extending outwardly from the top surface of the ridges, said teeth having tips, wherein the top surface of said ridges are disposed between the tips of said teeth and the bottom surface of said grooves. These apparatuses and processes enable a web to be formed which comprises apertures having greater open area than previously achievable with traditional processes and apparatuses.