Process for producing nonwoven fabric and nonwoven fabric

Details Process for producing nonwoven fabric and nonwoven fabric Process for producing nonwoven fabric and nonwoven fabric

D - Textiles, Paper

04

H

D04H 3/04 (2006.01) D01F 8/00 (2006.01) D02G 3/36 (2006.01) D04H 3/14 (2006.01)

Patent

CA 2561911

A process for producing a nonwoven fabric, comprising the laminating step of laminating conjugate yarns in at least three directions of the warp direction, diagonal direction and reverse diagonal direction, the conjugate yarns obtained by bundling multiple resin monofilaments each having a sheath-core structure composed of a fibrous core resin surrounded by a sheath resin whose melting point is >= 20~C lower than that of the core resin and effecting fusion bonding of the sheath resins; and the bonding step of heating the laminated filament bundles at temperature that is lower than the melting point of the core resin but higher than the melting point of the sheath resin so as to effect bonding thereof. Thus, there is provided a process for producing a nonwoven fabric excelling in flexibility and follow properties that is capable of regulating the strength, etc. thereof in conformity with the intended application field and demanded properties, and provided such a nonwoven fabric.

Il est prévu un procédé de fabrication de tissu non tissé, comprenant la phase de stratification de fils conjugués dans au moins trois directions, direction de la chaîne, direction diagonale et direction diagonale inversée, les fils conjugués étant obtenus par regroupement en faisceaux de multiples monofilaments de résine ayant chacun une structure à noyau gainé composée d~une résine à noyau fibreux entourée d~une gaine de résine dont le point de fusion est >= 20·C inférieur à celui du noyau de résine et en réalisant la liaison par fusion des gaines de résine; et la phase de liaison de chauffage des faisceaux de filaments stratifiés à une température inférieure au point de fusion du noyau de résine mais supérieure au point de fusion de la gaine de résine pour réaliser la liaison proprement dite. Ainsi, il est prévu un procédé de fabrication de tissu non tissé aux propriétés excellentes de flexibilité et de suivi, capable de réguler la résistance, etc. de celui-ci, en fonction du domaine d~application prévu et des propriétés exigées, de même qu~un tel tissu non tissé.

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