Reinforcement of nonwoven fabrics, components comprising such fabrics and methods of treating nonwoven fabrics

Abstract

A non-woven fabric (10) comprising at least one reinforcement zone (20a, 20b, 20c, 20d), the fibers and / or filaments constituting the sheet formed in a reinforcement pattern (22) comprising a plurality of geometric shapes (24) Taken together, the reinforcement zone extends over the entire length (L) of the sheet measured in the longitudinal direction (X1) and is strictly less than the length of the sheet measured in the transverse direction (Y1) perpendicular to the longitudinal direction (X1). (10) extends over the width (l1, l2) of the width (l). The sheet (10) therefore also comprises at least one non-reinforced zone (30a, 30b). The elongation of said reinforcement zone (20a, 20b, 20c, 20d) under the action of a given force applied along the longitudinal direction (X1) of the sheet (10) due to the bonding between fibers and / or filaments Less than the elongation in the unreinforced zone under the same force. Such a sheet (10) is particularly suitable for the manufacture of laminated components.

Description

technical field [0001] The present disclosure relates to nonwoven sheets and laminated assemblies comprising these sheets. [0002] The present disclosure relates more particularly to nonwoven sheets, and in particular to laminate assemblies suitable for use in the hygiene field, particularly for the manufacture of elastic ears of diapers. [0003] In this disclosure, the term "nonwoven" covers any nonwoven fabric within the generally accepted definition by those skilled in the art, generally made of fibers and / or filaments that are intertwined and held together to form a sheet of textiles. Background technique [0004] On a production line for laminated assemblies, and if Figure 16 As shown, the nonwoven sheet is subjected to tension F along its length (corresponding to the machine direction of the production line, ie the direction in which the sheet travels along the production line). [0005] Because of this tension F, the width of the sheet decreases. This phenomenon...

AI Technical Summary

Problems solved by technology

Nevertheless, this solution presents the following drawbacks: every time the speed of the sheet changes at the start or stop of the production line, the longitudinal tension applied to the sheet changes and the width of the sheet changes accordingly

Even so, when the laminated assembly is subsequently unwound, the constituent nonwoven sheets experience necking, causing deformation of the laminated assembly, preventing it from being properly guided on the downstream production line

Images