Embossing roller device, method of manufacturing topsheet using same, and absorbent article using same

Abstract

The present invention provides an embossing roll device capable of uniformizing fiber density and imparting uneven embossing to a surface sheet. An embossing roll device, which uses a first embossing roll (11) and a second embossing roll (12) as a set, and passes a surface sheet between these embossing rolls to impart uneven embossing, wherein, On the surface of the above-mentioned first embossing roll (11), there are protrusions (15) protruding outward from the reference plane (14) with the reference plane (14) as a boundary, and recesses recessed from the reference plane (14) (16), and there is a smooth reference plane (14) around these protrusions (15) and recesses (16), on the surface of the above-mentioned second embossing roll (12), there is a boundary with the reference plane (17) The convex portion (18) protruding outward from the reference plane (17) and engaging with the concave portion (16) of the first embossing roll (11), and the convex portion (18) recessed from the reference plane (17) and engaging with the first embossing roll (11) The protrusions (15) of the roller (11) engage the recesses (19) and there is a smooth reference surface (17) around these protrusions (18) and recesses (19).

Description

technical field [0001] The present invention relates to an embossing roll device capable of imparting uneven embossing to a surface sheet, and an embossing roll device that provides a three-dimensional effect, has high cushioning properties, eliminates skin problems by reducing the contact area with the skin, and is excellent in shape retention of the uneven embossing A method for the manufacture of a surface sheet. Background technique [0002] Conventionally, as surface materials of absorbent articles, there are products in which appropriate embossing patterns are applied for the purpose of suppressing wetness by reducing the contact area with the skin, or for improving tactility while obtaining texture. As such a product, the following patent documents 1 and 2 are mentioned, for example. [0003] In the following patent document 1, as Figure 9 As shown, a top sheet for absorbent articles is proposed, which is a top sheet 50 for absorbent articles used on the skin-contac...

AI Technical Summary

Problems solved by technology

[0008] However, since the concavo-convex shapes of the first rollers 53, 63 and the second rollers 54, 64 for imparting concavities and convexities to the upper sheets 51, 61 constitute a gear shape, the fiber density of the portion constituting the wall surface of the convex portion is much smaller than that of other portions. Many, there is a problem of unevenness

That is, when the nonwoven fabric enters the meshing portion of the first rollers 53, 63 and the second rollers 54, 64, the nonwoven fabric is strongly moved in the MD direction (flow path direction) and the CD direction (flow path direction) due to the meshing of the gears. Orthogonal direction) stretching, the fiber density becomes thinner, and the application of tensile stress is different in the wall facing the MD direction and the CD direction, so the fiber density is different, and there is a problem that the overall fiber density is not uniform

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