Nonwoven fabric

Abstract

A nonwoven fabric provided with concave / convex portions, and openings, which can be adjusted to densify only a part of the peripheral edges of the openings, without excessively increasing the fiber density in the convex portions and the concave portions. A fiber web can be moved to an area where the down-slanting wires of woven wire extending in the direction of width (WD), thereby forming a first side edge portion in the openings. The fiber web is hardly displaced to the opposite side edges of the first side edges, namely a second side edge portions.

Description

[0001]This application is based on and claims the benefit of priority from Japanese Patent Application No. 2006-174505, filed on 23 Jun. 2006 and Japanese Patent Application No. 2006-270111, filed on 29 Sep. 2006, the contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a nonwoven fabric and a nonwoven fabric manufacturing method.[0004]2. Related Art[0005]Conventionally, nonwoven fabrics have been used in a wide variety of fields, for example, sanitary goods such as paper diapers and sanitary napkins, cleaning goods such as wipers, and medical goods such as masks. Thus, the nonwoven fabrics can be used in various different fields, and when they are actually used in the products of the respective fields, it is necessary to be manufactured so as to have suitable characteristics and structure for the applications of the products, respectively.[0006]The nonwoven fabrics can be manufactured...

AI Technical Summary

Benefits of technology

[0011]The present invention aims at providing a nonwoven fabric provided with concave and convex portions, and openings, which can be adjusted to densify only a partial area of the peripheral edges of the openings, without excessively increasing the fiber density in the convex portion and the concave portions.

[0033]Accordingly, the present invention is capable of providing the nonwoven fabrics provided with the concave / convex portions, and the openings, which can be adjusted to densify only a partial area of the peripheral edges of the openings, without excessively increasing the fiber density in the raised ridge portion as the convex portion and the groove portion as the concave portion. The present invention is also capable of providing the method of manufacturing the nonwoven fabrics.

Problems solved by technology

However, these methods merely confound the fibers together at the most, and are not intended for adjusting the orientation and arrangement of the fibers in the fiber layer, and the shape of the fiber layer.

However, in this nonwoven fabric, a fiber aggregate constituting the nonwoven fabric is sandwiched between the protruding portions and the base material on the receiving side, resulting in concave portions, convex portions, and openings.

Therefore, the nonwoven fabrics of related art have the problem that, for example, the fibers in the wall portion of the convex portions and in the entire peripheral edge of the openings can be compressed to increase the fiber density, and these fibers may be filmed when heat is further supplied to obtain the nonwoven fabric.

When this nonwoven fabric is used in the top sheet or the like in an absorbent article, there is the tendency that liquid is hard to be penetrated downward.

In the event that a large quantity of a predetermined liquid enters the convex portions and the peripheral edges of the openings, there may arise the possibility that the liquid remains in the nonwoven fabric and stains the wearer's skin or the like, resulting in discomfort.

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