CN103957857A

CN103957857A - Absorbent article

Info

Publication number: CN103957857A
Application number: CN201280058565.4A
Authority: CN
Inventors: 石桥京子; 川口宏子; 内山泰树; 长原进介; 大西玲子
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2011-12-27
Filing date: 2012-12-13
Publication date: 2014-07-30
Anticipated expiration: 2032-12-13
Also published as: JP5869336B2; WO2013099624A1; JP2013132523A; CN103957857B; RU2550484C1; MY157549A

Abstract

Provided is an absorbent article, comprising a surface sheet, a rear face sheet, and an absorbent body interposed between these sheets. The surface sheet further comprises first protrusion parts which protrude toward a first face side of a liquid-supply side and which are provided with interior spaces, and second protrusion parts which protrude toward a second face side which is opposite to the first face side and which are provided with interior spaces. The first and second protrusion parts are respectively positioned alternating contiguously in different directions intersecting in plan view across the entire face of the surface sheet, and are provided with ring-structure wall parts between the second protrusion part peaks and opening parts thereof. The wall parts have a fibrous orientation in a direction in which the second protrusion part peaks and the apertures thereof are joined. The absorbent body further comprises first basis weight parts, and second basis weight parts which have lower basis weights than the first basis weight parts and which surround the first basis weight parts. The absorbent body further comprises groove-shaped depression parts which are positioned in contact with the second protrusion part peaks of the surface sheet, which make hollows from the rear face sheet side to the surface sheet side, and which extend in at least the longitudinal direction with the second basis weight parts as the bottom face thereof. At least a portion of the adjacent first and second protrusion parts and the depression parts are positioned in locations of mutual facing with the second basis weight parts interposed therebetween.

Description

Absorbent commodity

Technical field

The present invention relates to a kind of absorbent commodity.

Background technology

Sanitary napkin, protective pad, the such absorbent commodity of disposable diaper conventionally directly contact and use with wearer's skin.In this case, be used for especially greatly as the coarse position of easy generation skin, and dress for a long time sometimes.Therefore, expect the article of skin contact sense excellence.On the other hand, as basic function, require liquid-absorbent and liquid retainability for this absorbent commodity.

As existing absorbent commodity, as shown in figure 10, have and on absorber 3, be furnished with the structure that flat surface patch 1 forms.

In patent documentation 1, disclosing to be formed and had inside by upper synusia and lower synusia becomes the surface patch of multiple protuberances in cavity.In this surface patch, the bottom surface of raised part is rectangle, and protuberance entirety is rectangular-shaped or quadrangular pyramid platform shape.

In addition, in patent documentation 2, disclose following surface patch: in part or all of surface, multiple row ridge portion and slot part alternate combinations, ridge portion is convex curvature, and slot part is concavity bending, is separated with compartment of terrain and is furnished with multiple aperture portion on slot part.There is the three-dimensional flank erecting towards the back side from the surface of this surface patch at the circumference of this aperture portion.

In addition, in patent documentation 3, disclose the surface patch that following absorbent commodity is used: by carrying out local engagement in the junction surface of predetermined pattern, the part beyond the first fibrolaminar described junction surface forms convex in skin side with the second fibrous layer configuring on absorption side is stacked at the first fibrous layer of skin side configuration.

Formerly technical literature

Patent documentation

Patent documentation 1: TOHKEMY 2004-174234 communique

Patent documentation 2: Japanese kokai publication hei 09-299402 communique

Patent documentation 3: TOHKEMY 2004-000466 communique

Summary of the invention

The invention provides a kind of absorbent commodity, wherein,

Have: be configured in skin abutment face side surface patch, be configured in the back sheet of non-skin abutment face side and the absorber between described two,

It is side-prominent and have the first protuberance of inner space that described surface patch has first surface to liquid supply side, and side-prominent and there is the second protuberance of inner space to second of the opposition side of described first surface side, described the first protuberance, described the second protuberance all directions along the opticochiasmatic different directions of bowing within the scope of whole of this surface patch alternately configure continuously, between the top of described the second protuberance and the peristome of this second protuberance, there is the wall portion of ring-shaped structure, described wall portion has fibre orientation in the direction that links the top of described the second protuberance and the peristome of this second protuberance,

It is lower and surround the second level ground amount portion of described the first level ground amount portion than described the first Ping Liangbuping amount that described absorber has the first level ground amount portion and level ground amount, the configuration of joining of the top of the second protuberance of this absorber and described surface patch, and, this absorber has from surface patch depression described in described back sheet side direction and with the recess of the flute profile of extending at least along its length of described the second Liang Buwei bottom surface, level ground

At least a portion of adjacent described the first protuberance, described the second protuberance and described recess arrangement are across described the second level ground amount portion and position opposite each other.

Above-mentioned and other feature of the present invention and advantage can be passed through suitably with reference to accompanying drawing, further clear and definite by following record.

Brief description of the drawings

Fig. 1 is the preferably accompanying drawing of an embodiment that represents absorbent commodity of the present invention, (1) be the show in schematic partial sections that represents a part for the absorbent main body of absorbent commodity, (2) are the show in schematic partial sections of the dimension measurement position of the each several part of presentation surface sheet.

Fig. 2 is the contour map of an example representing that the preferred planar of the protuberance of observing from first surface side of the related surface patch of the absorbent commodity of the preferred embodiment of the present invention arranges.

Fig. 3 is the contour map that represents the variation of the plane figure of the protuberance of observing from first surface side of the related surface patch of the absorbent commodity of the preferred embodiment of the present invention.

Fig. 4 is the cutaway view that represents a preferred example of the absorber of absorbent commodity of the present invention.

Fig. 5 is that the plane that represents a preferred example of the absorber of absorbent commodity of the present invention arranges figure.

Fig. 6 is the schematic configuration cutaway view that moves forward into line display in absorbent commodity of the present invention to being supplied to liquid on the surface patch liquid less.

Fig. 7 is the schematic configuration cutaway view that moves forward into line display in absorbent commodity of the present invention to being supplied to liquid on the surface patch liquid more.

Fig. 8 is the schematic configuration cutaway view that moves forward into line display in absorbent commodity of the present invention to being supplied to liquid on the surface patch liquid further increasing.

Fig. 9 is the preferably axonometric chart of an embodiment that represents Briefs type articles for wearing of the present invention.

Figure 10 is the accompanying drawing that represents the surface patch of prior art and an example of absorber, and (1) is exploded perspective view, and (2) are cutaway views.

Detailed description of the invention

The present invention relates to a kind of for improving the liquid permeability of the irregular surface patch of tool and improving the diffusible absorbent commodity of liquid in absorber.

With reference to Fig. 1～Fig. 5, below a preferably embodiment of absorbent commodity of the present invention is described.It should be noted that, each structure member label symbol is described.

As shown in Figure 1, absorbent commodity of the present invention has the basic structure of following explanation.; possess absorbent main body 4, this absorbent main body 4 have the surface patch 1 of the liquid permeability of skin abutment face side configuration, at the back sheet 2 of the opaque liquid of non-skin abutment face side configuration and the absorber with liquid retainability between surface patch 1 and back sheet 2 (also referred to as absorbent core.)3。

The material that above-mentioned absorbent main body 4 can be used conventionally this class diaper etc. to use, is not particularly limited.

Surface patch 1 is preferably formed by liquid permeability non-woven fabrics.As liquid permeability non-woven fabrics, for being known as the non-woven fabrics of hot-wind nonwoven cloth, some bonded nonwoven, spun-bonded non-woven fabrics, spun-laced nonwoven fabric, stereo type non-woven fabric, its fiber preferably uses polyacrylic ultimate fibre, polypropylene and poly composite fibre, polyethylene terephthalate and poly composite fibre etc. to implement the fiber of hydrophilicity-imparting treatment.

As long as above-mentioned back sheet 2 has water proofing property and has poisture-penetrability, be not particularly limited.For example can enumerate following porous film: hydrophobic thermoplastic resin and the small inorganic filler or the organic polymer without intersolubility etc. that are made up of calcium carbonate etc. are carried out melting mixing and form thin film, this thin film is extended and obtains above-mentioned porous film along single shaft or twin shaft.As thermoplastic resin, can enumerate polyolefin.As this polyolefin, can enumerate high density or Low Density Polyethylene, wire Low Density Polyethylene, polypropylene, polybutene etc., above-mentioned material can be used alone or as a mixture.

In absorber 3, for example, can use fiber assembly or share this fiber assembly and material that absorbable polymer forms etc.As the fiber that forms fiber assembly, can use the hydrophilic natural fibers such as paper pulp fiber, synthetic fibers (preferably implementing the fiber of hydrophilicity-imparting treatment) etc.Level ground amount is not particularly limited, and is preferably 150g/m ²above and 500g/m ²below.Also can use the emulsion sheet that covers absorber 3.As this emulsion sheet, the non-woven fabrics that can use the thin papers such as hydrophilic napkin (tissue paper), be formed by the hydrophilic fibre such as cotton or artificial silk, the fiber of synthetic resin is implemented to the non-woven fabrics that hydrophilicity-imparting treatment forms (spin SMS-spunbond (SMS), spin SMS-melt-blown-spunbond (SMMS), spunbond-spin SMS-compound nonwoven cloths such as spunbond (SSMS)) etc.

The detailed content of above-mentioned surface patch 1 is described below.

Surface patch 1, within the scope of its whole, separates predetermined distance and disposes first protuberance 11 outstanding to first surface (surface) the side Z1 of liquid supply side and the second outstanding protuberance 12 of second (back side) side Z2 to the opposition side of this first surface side Z1.The plane of this first, second protuberance 11,12 arranges routine detailed content and sees below.Preferred above-mentioned first surface side Z1 is towards wearer's flesh face side, and above-mentioned second side Z2 is configured in absorber 3 sides of absorbent commodity inside.Below, suppose that the embodiment that first surface side Z1 uses towards wearer's flesh face describes.

The top 12T of above-mentioned the second protuberance 12 (following, also referred to as the second top 12T.) and its peristome 12H between there is wall portion 13.This wall portion 13 forms ring-shaped structure in the second protuberance 12.The fiber that forms wall portion 13 mainly has fibre orientation in the direction (the double-head arrow direction shown in Fig. 1) of edge part that links the second top 12T and its peristome 12H.In other words, there is the radial fibre orientation such toward the outer side from the second top 12T.Thereby the mode that fiber shrinks towards the second top 12T with the face direction of the face from wall portion 13 along this sheet in the scope of the second protuberance 12 is orientated.Like this, by thering is the radial toward the outer side fibre orientation from the second top 12T, liquid described later is shifted and has driving effect, and there is excellent resiliency.In other words, first, second protuberance 11,12 has excellent liquid permeability, even and if realize being difficult for crumbling deforming and also easily recover such effect.

In addition, and the top 11T of wall portion 13 and the first protuberance 1 (following, also referred to as the first top 11T.), that the top 12T of the second protuberance 12 compares fibre weight is less.In addition, first, second top 11T, 12T are higher with wall portion 13 phase specific densitys.It should be noted that, the variation of the fibre weight of the irregular surface patch 1 of formation in the present invention in tiny area is larger, therefore be difficult to determine, wall portion 13 can be by measuring fiber spacing from inferring relative size with the fibre weight of first, second top 11T, 12T.Specifically, because fiber spacing fiber shared ratio when increasing diminishes, therefore with fiber spacing from compared with shorter structure, fibre weight reduces.

In addition, by the thickness at the each minute sites of meter dough sheet 1 place, can relatively compare the height of density according to the supposition size of thickness and fibre weight.With respect to the size of utilizing fiber spacing from the fibre weight relatively judging, can evaluate out the overlapping state of fiber for being close to (thinner thickness) or separating (thickness is thicker) according to the observation of thickness direction.Specifically, utilize fiber spacing from inferring as follows: the volume that launches the cylinder forming by the circular cavity that relatively fiber surrounds on thickness direction, can carry out density relatively, fiber spacing is larger from the volume of a cylinder that for diameter and thickness is height, and density is lower.

In absorbent commodity of the present invention, the liquid of the surface patch of the fiber spacing in wall portion 13 when to a large amount of absorption sees through difficulty or ease and impacts, the fiber spacing of wall portion 13 from and thickness the stability of structure is impacted.It should be noted that, fiber spacing is from seeing below with the preferable range of thickness.

Below, the concrete shape example of above-mentioned first, second protuberance 11,12 is described.

First, second top 11T, 12T are formed as having to the frustum of a cone or the hemisphere of fillet.In more detail, the outstanding shape of the first protuberance 11 sharply and more approaches hemisphere, on the other hand, the outstanding shape of the second protuberance 12 becomes more sharply and has at top circular cone or the frustum of a cone of fillet.In the present embodiment, the shape of first, second protuberance 11,12 is not limited to above-mentioned shape, can be also to give prominence to arbitrarily form.For example, can adopt various cone shapes.For example, the cone shape in this description extensively comprises circular cone, the frustum of a cone, pyramid, the frustum of a pyramid, oblique cone etc.

Above-mentioned first, second protuberance 11,12 has inner space 11S, the 12S with the frustum of a cone its appearance similar, have fillet at top or hemisphere.The rib portion 14 that each inner space 11S, 12S are bonded the first top 11T of the first adjacent protuberance 11 separates, and forms discontinuous space.

On the other hand, as mentioned above between each top 11T, the 12T and each peristome 11H, 12H of first, second protuberance 11,12, form and have a wall portion 13, form via this wall portion 13 and above-mentioned rib portion 14 and make the continuous sheet structure of first, second protuberance 11,12.

Thickness (being sheet apparent thickness t10 below) on surface patch 1 entirety (the first 11T～the second top, top 12T) in the present invention apparent is not particularly limited, but from absorbent commodity being given the viewpoint of good buffering sense, for more than 1.0mm and below 9.0mm, more than being preferably 1.5mm and below 7.0mm, more preferably more than 2.0mm and below 6.0mm.In addition, from having the viewpoint of resiliency and smoothness concurrently, apparent thickness (the apparent thickness t11 of the first top 11T) from the first top 11T to the first protuberance 11 extreme lower position of rib portion 14 is more than 0.1mm and below 3.0mm, more than being preferably 0.3mm and below 2.5mm, more preferably more than 0.5mm and below 2.0mm.The second protuberance 12 being positioned at the top 12T (from 14 to the second top 12T of rib portion) of wall portion 13 and the second protuberance becomes the cup-shaped being impaled by wall portion 13, the apparent thickness of the second protuberance 12 in this shape (is that cup portion height H is c) for more than 0.5mm and below 8.0mm below, more than being preferably 0.7mm and below 7.0mm, more preferably more than 1.0mm and below 5.0mm.

About the thickness of the surface patch at the first top 11T, the second top 12T and 13 each several part places of wall portion, wall portion 13 is thinner compared with the first top 11T and the second top 12T, the thickness t 111 of the first top 11T is more than 0.5mm and below 2.0mm, in addition, the thickness t 131 at the position of the face 1/3 of the distance skin side of wall portion 13 is that 0.1mm is above and below 0.7mm, is 0.5mm～1.0mm apart from the thickness t 132 at the position of the face 2/3 of skin side.Now, in the time of the large quantity of fluid such as disposable excretion urine, liquid is transferred to absorber 3 from the second top 12T, thereby liquid overflows and the amount transmitted to absorber 3 is many overwhelmingly from cup portion, and therefore the impact of the thickness t 121 of the second top 12T when shifting large quantity of fluid is less.On the other hand, cup portion can not crumble under pressure.; the viewpoint keeping from shape; by making the cup subordinate portion of wall portion 13, (in this case the thickness (thickness t 132) of apparent thickness (1/3 position of the top 12T of cup portion height H distance the second protuberance 12 c)), in above-mentioned scope, keeps necessary fibrous structure thereby form shape.

In addition, in the first top 11T and wall portion 13, the orientation of the fiber while overlooking, the size in interfibrous gap (fiber spacing from) difference.The mode that the angle of the fibre orientation of being measured by method described later when the MD direction of surface patch 1 being measured as orientation for the first top 11T is 0 ° is measured.In the case of position as shown in Figure 2, by being made as to 90 °, the imaginary line direction that links the first top 11T and the second top 12T obtains orientation angles along being orientated orientation angles in the wall portion 13 that orthogonal direction is adjacent with MD at the first top 11T.Orientation angles in above-mentioned wall portion 13 in the case of from more than 0 ° and 360 ° following to revise (conversion) be more than 0 ° and the angular range of 180 °, there is the orientation angles of (imaginary line direction ± 30 ° left and right in) fiber such along the imaginary line direction of link the first top 11T and the second top 12T.

For the measurement of the orientation in wall portion 13, compare with the position being connected along MD direction of meter dough sheet 1, measure the direction staggering with MD direction and more easily observe the variation of fibre orientation.Therefore, with the wall portion 13 of the first top 11T adjacency the configuration as shown in figure 3 in the situation that, to carry out the measurement of fibre orientation described later by linking part that the first top 11T and the imaginary line of the second top 12T and the intersecting angle of MD direction be positioned at 90 ° ± 45 ° of directions as object and the direction of the imaginary line of link the first top 11T and the second top 12T being made as to the mode of 90 °.

In addition, the orientation intensity of wall portion 13 is more preferably more than 1.05.About the orientation intensity of the first top 11T, there is no special provision, but more expect lower than wall portion 13.By making top 11T, the 12T of orientation angles under above-mentioned adjacent position different from wall portion 13, in wall portion 13, fiber is orientated in the mode of shrinking to the second top 12T side.In addition, by making the orientation intensity of wall portion 13 high, make the fiber of wall portion 13 moisture during when a large amount of excretions of liquid, can make fiber interval each other open, liquid is handed off to absorber 3 quickly.From the viewpoint of smoothness, more than the average fiber spacing in the first top 11T is preferably 1 μ m and below 40 μ m, more preferably more than 5 μ m and below 30 μ m.In addition, the average fiber spacing in wall portion 13 is greater than the first top 11T, from the viewpoint that liquid is passed through, more than being preferably 10 μ m and below 100 μ m, more preferably more than 15 μ m and below 80 μ m.In addition, from maintain wall portion 13 structure viewpoint, while absorbing large quantity of fluid to mobile viewpoint in the 12S of inner space, fiber spacings more than 40 μ m from number ratio be preferably more than 5% and below 50%, more preferably more than 5% and below 30%.

It should be noted that, the orientation of the fiber of the first protuberance 11 and the second protuberance 12 forms and non-woven fabrics based on method for makings such as hot blasts and manufacturing in the case of utilizing based on the net of common combing method, have the orientation angles of arranging such fiber along the length direction of non-woven fabrics, orientation intensity can be got the scope more than 1 and below 1.7 according to object., when the orientation of fiber strong (orientation intensity is higher) the arrangement vector of fiber towards orientation angles direction.,, due to more fiber orientation orientation angles direction, the movement that therefore adds man-hour becomes easily stable.On the contrary, in the time that the orientation intensity of fiber is lower, the direction of fiber is disperseed, and the strength ratio that conventionally can be set as length direction and width approaches 1, obtains the balance of intensity.Conventionally, from the viewpoint of the coiling difficulty or ease of fiber, fiber is implemented to curl, non-woven fabrics is arranged along its length and is also easily had random orientation thus, shows the orientation angles of 0 ° ± 50 ° of left and right with respect to length direction.

On the other hand, the wall portion 13 of the surface patch 1 in the present invention is irrelevant with the orientation angles of the fiber of first, second protuberance 11,12, or there is orientation compared with large angle in the second protuberance 12 directions from the fibre orientation Angulation changes of first, second protuberance 11,12, thereby realize described effect.

Next,, with reference to Fig. 2 and Fig. 3, the preferred planar of first, second above-mentioned protuberance 11,12 is arranged to example and describe.

As shown in Figure 2, arrange in example first, within the scope of whole of surface patch 1, above-mentioned first, second protuberance 11,12 be configured to bow within the scope of as whole at surface patch 1 opticochiasmatic different directions, first direction X and second direction Y go up alternately continuous separately.The angle of the crossing of this first direction X and second direction Y is preferably 30 °～90 ° (orthogonal), and illustrated example is 90 °.And 11 adjacent of the first protuberances form rib portion 14.

It should be noted that, the arrangement form of above-mentioned first, second protuberance 11,12 is not limited to the structure shown in described Fig. 2.Example as shown in Figure 3, also can configure six the first protuberances 11 on hexagonal summit using the second protuberance 12 as center, this patterning Zone Full in the face of surface patch 1 is arranged.In this case, the quantity of the first protuberance 11 exceeds the quantity of the second protuberance 12, therefore produce the state that the first protuberance 11 is adjacent to each other, but as long as entirety forms continuous sheet state, because first direction X, second direction Y as the opticochiasmatic different directions of bowing and third direction W go up alternately configuration continuously separately, therefore the arrangement of above-mentioned form is also contained in the first protuberance 11 and the second protuberance 12 and " replaces " and arrange in such meaning.

The surface patch 1 with first, second protuberance 11,12 arranging as described above does not have bending section, and the curved surface continuous by entirety forms.

So, above-mentioned surface patch 1 preferably has structure continuous in face direction.Should " continuously " refer to not there is interrupted part and aperture.But the such micro hole in interfibrous gap is not contained in above-mentioned aperture.It is more than 1mm that above-mentioned aperture can be defined as for example its aperture in the time being equivalent to diameter of a circle.

Next, with reference to Fig. 4 and described Fig. 1, a preferred structure example of above-mentioned absorber 3 is described.

Above-mentioned absorber 3 exists the second continuous level ground amount portion 32 and level ground amount to be impaled by the second level ground amount portion 32 higher than the first 31, the first level ground amount portions 31 of level ground amount portion of this second level ground amount portion 32.In addition, there is the recess 33 of the groove shape extending at least along its length from back sheet 2 lateral surface sheet 1 side depressions and using the second level ground amount portion 32 as bottom surface.This recess 33 is configured in back sheet 2 sides contrary with surface patch 1 side of absorber 3, and a part and the recess 33 of first, second adjacent protuberance 11,12 are configured in the position opposite each other across absorber 3.Above-mentioned the second level ground amount portion 32 is configured to surround the first level ground amount portion 31, disposes the recess 33 of groove shape in the back sheet side of the second level ground amount portion 32 of 31, the first level ground amount portion.Thereby absorber 3 is configured to the first level ground amount portion 31 and is thicker than the second level ground amount portion 32.And the face of the absorber 3 of surface patch 1 side (accompanying drawing upside) roughly becomes tabular surface.Other the first level ground amount portion 31 is higher with the second level ground amount portion 32 phase specific densitys.The preferable range of density is not particularly limited, but the first level ground amount portion 31 is preferably in 0.03g/cm ³above and 0.50g/cm ³following scope, more preferably in 0.05g/cm ³above and 0.40g/cm ³following scope, further preferably in 0.07g/cm ³above and 0.30g/cm ³following scope, the second level ground amount portion 32 is preferably in 0.01g/cm ³above and 0.15g/cm ³following scope, more preferably in 0.03g/cm ³above and 0.12g/cm ³following scope.

So, because recess 33 is disposed at absorber 3 from back sheet 2 sides of the opposition side of surface patch 1 side, therefore the liquid of supplying with to the surface of surface patch 1 is transferred to the inner space 11S of the first protuberance 11 from the second protuberance 12, be absorbed body 3 absorb from surface patch 1 side.And, from the second level ground amount portion 32 of absorber 3 directly or import to recess 33 by the first level ground amount portion 31 walls from the second level ground amount portion 32, transfer to recess 33.Like this, the liquid that temporarily imports to the second level ground amount portion 32 is absorbed a certain amount of at this, and the amount not being absorbed is in addition transferred to recess 33.If in the situation that recess 33 is disposed at surface patch 1 side, liquid is directly transferred to recess, does not enter the overflow of recess completely and becomes the key factor of leakage.Thereby expectation is configured in recess 33 opposition side of surface patch 1.

In addition, 3 of the absorbers of surface patch 1 side are plane, thus, even if the irregular surface patch 1 of tool forming based on first, second protuberance 11,12, also can make reliably the second top 12T and absorber 3 join, therefore become good with the cementability based on hot-melt adhesive (not shown) of surface patch 1.This hot-melt adhesive with form tool gapped applicator surface mode, for example adhere in the shape of a spiral, therefore shift and can not hindered by bonding agent from the interior liquid to absorber 3 of the second protuberance 12.In addition, make the hot-melt adhesive of the gapped applicator surface of tool by use, guarantee that surface patch 1 and integraty and the tracing ability of absorber 3 become well, with the second protuberance 12 bonding in configuration power partly, therefore can maintain the flexibility of absorbent commodity.It should be noted that, cementability can be evaluated by the peel strength between sheet, more than this peel strength is preferably 0.1cN and below 50cN, more preferably more than 0.5cN and below 10cN.When peel strength is during lower than 0.1cN, the movement of the liquid while being difficult to occur to absorb on a small quantity from surface patch 1 to absorber 3, when peel strength is during higher than 50cN, the apparent thickness of surface patch 1 easily reduces, the effect while being difficult to realize a large amount of absorption.

In addition, because the first level ground amount portion 31 to the second level ground amount portion 32 density are high, therefore can carry out liquid transfer to the first level ground amount portion 31 from the second level ground amount portion 32, but that liquid from from the first level ground amount portion 31 to the second level ground amount portion 32 shifts is less.Thereby the liquid being absorbed by the first level ground amount portion 31 is difficult for returning., liquid retainability improves.

Next, with reference to Fig. 5, the example that preferably arranges of the groove being made up of recess to above-mentioned absorber 3 describes.

As shown in Fig. 5 (1), in the rear side contrary with above-mentioned surface patch 1 (with reference to Fig. 1) side of this absorber 3, as at least along its length extend groove shape recess 33 and there is first, second, third recess 33A, 33B, 33C.

Specifically, above-mentioned absorber 3 is made up of three parts on its length direction L.Have be divided into pars intermedia the first absorbent portion 3A, be configured in this first absorbent portion 3A side's side the second absorbent portion 3B and be configured in the 3rd absorbent portion 3C of the opposing party's side of the first absorbent portion 3A.Thereby the first absorbent portion 3A is configured between the second absorbent portion 3B and the 3rd absorbent portion 3C.In addition, the profile of absorber 3 can be also rectangle, but is more preferably configured to the mode to coordinate with the root of wearer's huckle, and (following, width D refers to the direction with above-mentioned length direction L-orthogonal to broad ways D.) the middle shape attenuating at the first absorbent portion 3A place.It should be noted that, first, second, third absorbent portion 3A, 3B, 3C only distinguish and represent the region of absorber 3, not absorption portion separately from part.In addition, in the time that absorber 3 is for example installed on the absorbent commodity of diaper and wears, the first absorbent portion 3A is disposed at crotch part, and for example the second absorbent portion 3B is disposed at veutro, and the 3rd absorbent portion 3C is disposed at dorsal part.Or the second absorbent portion 3B is disposed at dorsal part, the 3rd absorbent portion 3C is disposed at veutro.

Mainly dispose multiple (being two in illustrated example) first recess 33A at the first absorbent portion 3A place, the inner side in the side week of the first absorbent portion 3A under each the first recess 33A is positioned at and overlooks and mainly L configuration along its length.At this, " mainly disposing multiple the first recess 33A at the first absorbent portion 3A place " refers to, except only dispose the situation of the first recess 33A, also comprise a part situation that disposes the second recess 33B, the 3rd recess 33C at the first absorbent portion 3A place.In addition, " mainly L configuration along its length " refers to, except the situation of only L configuration along its length, also comprises the situation of a part along other direction configurations.In addition, mainly configure respectively second, third recess 33B, 33C in second, third absorbent portion 3B, 3C, respectively second, third recess 33B, 33C are with respect to mainly along inclined direction configuration of length direction L.At this, " in second, third absorbent portion 3B, 3C, mainly configuring respectively second, third recess 33B, 33C " refers to, except only configuring the situation of second, third recess 33B, 33C, also comprises the situation of part configuration the first recess 33A." mainly along inclined direction configuration " refers to, also a part can be configured along direction in addition, as the concrete example of incline direction, is configured to clathrate.Thereby the first recess 33A is different from the configuration of the recess of second, third recess 33B, 33C.

It should be noted that, a part of the first recess 33A also can be disposed at a part of second, third absorbent portion 3B, 3C.For example, according to the desired location of the boundary between first, second absorbent portion 3A, 3B, a part of the second recess 33B is disposed at a part of the first absorbent portion 3A, or a part of the first recess 33A is disposed at a part of the second absorbent portion 3B.In addition, be also identical for the 3rd absorbent portion 3C.So, according to the desired location of the boundary between the first absorbent portion 3A and second, third absorbent portion 3B, 3C, recess changes with respect to the configuration relation of each absorbent portion.

In addition, first, second recess 33A, 33B each other and first, the 3rd recess 33A, 33C be configured to continuous recess each other.

In addition, the section shape of the first recess 33A～three recess 33C does not limit, and can have rectangle or inverted trapezoidal.It should be noted that, absorber 3 is made up of the aggregation of the such fiber of non-woven fabrics etc., and therefore the profile of the section shape of each recess uncertain, is general shape.

In addition, as shown in Fig. 5 (2), absorber 3 is on the basis of the absorber 3 of the collocating structure shown in described Fig. 5 (1), in the first absorbent portion 3A, mainly dispose multiple (being four in illustrated example) first recess 33A, on the width D of the first absorbent portion 3A, dispose the 4th recess 33h being connected with the first recess 33A of L configuration along its length.Thereby utilizing the first recess 33A and the 4th recess 33h is so-called ladder grid by recess arrangement.Other structural elements are identical with the absorber 3 shown in described Fig. 5 (1).In this case, liquid shifts the recess that enters into rapidly outside, can carry out more broadly liquid transfer.Therefore, the absorbtivity of liquid increases, and time shorten till being absorbed.

It should be noted that, the first recess 33A and the 4th recess 33h that belong to the first absorbent portion 3A can be configured to ladder shape (the first level ground amount portion 31 becomes zigzag), also can be configured to clathrate (the first level ground amount portion 31 is base-like).In addition, the second recess 33B, the 3rd recess 33C that belong to the second absorbent portion 3B, the 3rd absorbent portion 3C can not exist, also can be for being interrupted shape (discontinuous).In addition, for length direction L, can be parallel also can be vertical.In addition, multiple the first recess 33A, the second recess 33B, the 3rd recess 33C that belong to the first absorbent portion 3A can have identical width separately, also can have different in width.

Next, as an example of above-mentioned preferred implementation example, the action effect to absorbent commodity of the present invention describes.First, with reference to Fig. 6, the liquid during to feed fluid on above-mentioned surface patch 1 moves and describes.

As shown in Figure 6, in the case of the liquid measure of liquid 51 (being represented by arrow in the accompanying drawings) supplied with is less, liquid 51 conducts and shifts to absorber 3 sides from the top 12T of the second protuberance 12 in the wall of the inner space 12S of the second protuberance 12, supposes that liquid 51 shifts to level ground the first higher level ground amount portion 31 of amount from the second lower level ground amount portion 32 of the level ground amount of absorber 3.

In the case of the liquid measure supplied with is more, as shown in Fig. 7 (1), have little time to flow out from the liquid 51 of the top 12T of the second protuberance 12 in addition, liquid 51 is deposited in the inner space 12S of the second protuberance 12.

So, as shown in Fig. 7 (2), the liquid 51 of retaining in the inner space 12S of the second protuberance 12, by linking between the fiber being orientated in the direction of top 12T and peristome 12H, can flow into the inner space 11S in the first protuberance 11 moment under the effect of its hydraulic pressure.And the fibre weight of wall portion 13 is less than top 11T, 12T, therefore the hydraulic action of the degree in liquid 51 is deposited in the second protuberance 12, in the time of wall portion 13, can be thought and easily expand between fiber.

Then, as shown in Fig. 7 (3), because the amount of the liquid 51 flowing into from 12SXiang inner space, inner space 11S moment is more, therefore moment exceedes the liquid measure of measuring second lower 32 absorbent liquid measures of level ground amount portion and can being transferred to from the second level ground amount portion 32 the first level ground amount portion 31 that level ground amount is higher on the level ground of the absorber 3 of surface patch 1 side configuration, therefore produces remaining liq 52.This remaining liq 52 passed the wall of the first level ground amount portion 31 and was deposited in recess 33.There is the back sheet 2 of opaque liquid in open side (accompanying drawing downside) in this recess 33, even if therefore the open side of recess 33 is downward, liquid 51 also can not spill and be deposited in recess 33, in recess 33 conduction and be diffused into absorber 3 on a large scale in.

In the present invention, a part for first, second adjacent protuberance 11,12 and recess 33 are configured in across absorber 3 and position opposite each other, and the liquid 51 that is therefore transferred to the inner space 11S of the first protuberance 11 is easily transferred to recess 33 by the second level ground amount portion 32 of absorber 3.,, because the spacing of 11,12 of first, second protuberances (between first, second top 11T, 12T) is narrower than the recess 33 of absorber 3, therefore necessarily disposing first, second protuberance 11,12 with the opposed position of recess 33.Thus, can make the liquid of the inner side that is supplied to the first protuberance 11 shift to recess 33 rapidly.And the liquid 51 (remaining liq 52) of transferring to recess 33 in recess 33, conduct and be diffused into absorber 3 on a large scale in, be absorbed body 3 and absorb.

In the case of the liquid measure of supplying with further increases, as shown in Figure 8, transfer and liquid 51 that imagination is carried out liquid 51 as described above shift in the mode that is directly persisted to the recess 33 of bottom from the second level ground amount portion 32 of low level ground amount.Now, under the effect of hydraulic pressure, the second level ground amount portion 32 is to recess 33 side depressions sometimes.And, be deposited in that liquid 51 in recess 33 conducts in recess 33 and to the long range diffusion of absorber 3, be absorbed body 3 and absorb.

As mentioned above, the liquid 51 being supplied on surface patch 1 is transferred to rapidly absorber 3 by surface patch 1 from inner space 11S, spreads and is absorbed.

Thereby, suppress the transfer of liquid 51 on surface patch 1, therefore can prevent side leakage.In addition, even if the in the situation that of a large amount of feed fluid 51, liquid 51 also shifts rapidly to the inner space 11S becoming in first protuberance 11 of second (back side) side Z2 of surface patch 1 from the second protuberance 12 is interior, therefore be difficult for first surface (surface) the side Z1 remaining liq at surface patch 1, therefore can reduce the sense of sticking together of skin.

In addition, also because the density of the top 12T of the second protuberance 12 is higher than wall portion 13, the in the situation that of a large amount of feed fluid 51, liquid 51 is difficult for revealing from top 12T, therefore easily liquid 51 is temporarily deposited in to the inner space 11S of the first protuberance 11.In addition, because the density of top 12T is higher than wall portion 13, therefore also have advantages of that top 11T, 12T are difficult for crumbling.

Next,, with reference to the axonometric chart shown in Fig. 9, below a preferably embodiment of Briefs type articles for wearing of the present invention is described.

In the Briefs type articles for wearing 100 of this description, the height direction of Briefs type articles for wearing is made as to Y-direction, the width of Briefs type articles for wearing is made as to directions X, also referred to as " waistline direction ".

As shown in Figure 9, the Briefs type articles for wearing of present embodiment is for example underpants-style diapers 100, have the veutro that is configured in wearer veutro portion 121, be configured in the lower crotch 113 of crotch part and be configured in the drosal part 123 of dorsal part.Below, this underpants-style diapers 100 is elaborated.

Underpants-style diapers 100 is made up of the described absorbent main body 4 that forms the exterior body 111 of veutro portion 121 and drosal part 123 and form lower crotch 113.

Exterior body 111 is by engaging a side's of veutro portion 121 side edge part 121A and the opposing party's of veutro portion 121 side edge part 121B is engaged and is configured to ring-type with a side's of drosal part 123 side edge part 123B with a side's of drosal part 123 side edge part 123A.

In addition, lower crotch 113 by setting up across veutro portion 121 and drosal part 123 and the absorbent main body 4 that is configured in wearer's crotch part form.Utilize exterior body 111 in the form of a ring and the absorbent main body 4 of setting up at lower crotch 113 to form Briefs type.

Absorbent main body 4 forms crotch part, and extend to below the waist peristome 112 of exterior body 111 at veutro portion 121 and drosal part 123 places near, fixing with exterior body 111.Thus, in waistline region, exterior body 111 has the middle section of absorbent main body of being fixed with 4 and the two side areas of attaching absorbent main body 4 not.Above-mentioned " waistline region " refer to, roughly from waist peristome 112 ora terminalis along being that height direction (Y-direction) is to the region near the position configuring the outer side contacts root of huckle towards the direction of its underpart.

Above-mentioned exterior body 111 is configured to and is laminated with internal layer part 131 and outer part 133, and the height direction (Y-direction) of exterior body 111 spaced apart there are multiple layer regions that have one deck internal layer part 131.Be expressed as follows in the accompanying drawings structure: in a layer region, have internal layer part 131, outer part 133 is layered on internal layer part 131 in the height direction of exterior body 111 spaced apartly.

The lamination area that is laminated with internal layer part 131 and outer part 133 has retractility on the width (directions X) of underpants-style diapers 100.Lamination area also can possess elastomer 135 between internal layer part 131 and outer part 133.In this case, elastomer 135 is clamped between internal layer part 131 and outer part 133 under elongation state, thus, has retractility.Or, as described later, also can make internal layer part 131 and outer part 133 these two sides or any one party be formed by the material with retractility.

As the sheet of the material as internal layer part 131 and outer part 133, can enumerate respectively non-woven fabrics based on various method for makings of such as hot-wind nonwoven cloth, hot-rolling non-woven fabrics, spun-laced nonwoven fabric, spun-bonded non-woven fabrics, melt spraying non-woven fabrics etc., weave cotton cloth, woven cloth, resin film etc., also can use stacked above-mentioned material integrated sheet material forming etc.

In addition, especially, from making breathability, the good viewpoint of feel, internal layer part 131 is preferably formed by non-woven fabrics, and, from the viewpoint that prevents that Excreta from revealing, preferably formed by hydrophobic non-woven fabrics.

Because above-mentioned underpants-style diapers 100 uses the absorbent main body 4 of absorbent commodity of the present invention at lower crotch 113, therefore can prevent that liquid from spilling, and can reduce the sense of sticking together of skin.

About above-mentioned embodiment, the present invention is open following absorbent commodity and Briefs type articles for wearing further.

<1> absorbent commodity, wherein, has: be configured in skin abutment face side surface patch, be configured in the back sheet of non-skin abutment face side and the absorber between described two,

It is lower and surround the second level ground amount portion of described the first level ground amount portion than described the first Ping Liangbuping amount that described absorber has the first level ground amount portion and level ground amount, the configuration of joining of the top of the second protuberance of described absorber and described surface patch,

And this absorber has from surface patch side depression described in described back sheet side direction and with the recess of the groove shape extending at least along its length of described the second Liang Buwei bottom surface, level ground,

<2> is according to the absorbent commodity described in <1>, and wherein, the orientation of described wall portion has from the top of described the second protuberance radial fibre orientation toward the outer side.

<3> is according to the absorbent commodity described in <1> or <2>, wherein, fiber with the face direction from described wall portion along the face of described surface patch in the scope of described the second protuberance towards the top of described the second protuberance and the mode of shrinking be orientated.

<4> is according to the absorbent commodity described in any one in <1> to <3>, wherein, described the first protuberance and described the second protuberance have the inner space with its appearance similar and at top with the frustum of a cone or the hemisphere of fillet.

<5> is according to the absorbent commodity described in any one in <1> to <4>, wherein, described inner space separates via the rib portion at the first top that links adjacent described the first protuberance, forms discontinuous space.

<6> is according to the absorbent commodity described in any one in <1> to <5>, wherein, the face of the described absorber of described surface patch side is tabular surface.

<7> is according to the absorbent commodity described in any one in <1> to <6>, wherein, described the first level ground amount portion and described the second level ground amount portion are in a ratio of high density.

<8> is according to the absorbent commodity described in any one in <1> to <7>, and wherein, the density of described the first level ground amount portion is 0.03g/cm ³above and 0.50g/cm ³below.

<9> is according to the absorbent commodity described in any one in <1> to <8>, and wherein, the density of described the second level ground amount portion is 0.01g/cm ³above and 0.15g/cm ³below.

<10> is according to the absorbent commodity described in any one in <1> to <9>, wherein, the fibre weight of described wall portion is fewer than the fibre weight at each top of described the first protuberance, described the second protuberance.

<11> is according to the absorbent commodity described in any one in <1> to <10>, wherein, described in the density ratio at the top of described the first protuberance, described the second protuberance, the density of wall portion is high.

<12> is according to the absorbent commodity described in any one in <1> to <11>, wherein, the thickness of the described surface patch at the top of described the first protuberance, the top of described the second protuberance and each several part place of described wall portion is formed as, and described wall portion is than the top thin of the top of described the first protuberance and described the second protuberance.

<13> is according to the absorbent commodity described in any one in <1> to <12>, wherein, the thickness at the top of described the first protuberance is more than 0.5mm and below 2.0mm, the thickness at the position of the face 1/3 of the distance skin side of described wall portion is that 0.1mm is above and below 0.7mm, is that 0.5mm is above and below 1.0mm apart from the thickness at the position of the face 2/3 of skin side.

<14> is according to the absorbent commodity described in any one in <1> to <13>, wherein, the average fiber spacing of described wall portion than the fiber spacing at the top of described the first protuberance from length.

<15> is according to the absorbent commodity described in any one in <1> to <14>, wherein, the average fiber spacing at the top of described the first protuberance is more than 1 μ m and below 40 μ m.

<16> is according to the absorbent commodity described in any one in <1> to <15>, wherein, the average fiber spacing of described wall portion is that 10 μ m are above and below 100 μ m.

<17> is according to the absorbent commodity described in any one in <1> to <16>, wherein, the top of described the second protuberance and described absorber are fixed by hot melt material.

<18> is according to the absorbent commodity described in any one in <1> to <17>, wherein, described absorber is made up of three parts on its length direction, in the first absorbent portion that is divided into pars intermedia, dispose multiple the first recesses, the inner side in the side week of described the first absorbent portion under each the first recess is positioned at and overlooks, mainly alongst configuration.

<19> is according to the absorbent commodity described in any one in <1> to <18>, wherein, described absorber is made up of three parts on its length direction, comprise the first absorbent portion that is divided into pars intermedia, be configured in the second absorbent portion of side's side of the first absorbent portion, and be configured in the 3rd absorbent portion of the opposing party's side of the first absorbent portion, in described the second absorbent portion, in described the 3rd absorbent portion, dispose respectively the second recess, the 3rd recess, described the second recess, described the 3rd recess is respectively along the direction configuration of tilting with respect to length direction.

<20> Briefs type articles for wearing, it has the veutro portion of the veutro that is configured in wearer, the drosal part that is configured in the lower crotch of crotch part and is configured in dorsal part, the side edge part of veutro portion engages with the side edge part of drosal part and is formed as Briefs type, wherein, configure the described absorbent commodity described in any one in described <1> to <19> at described crotch part.

[embodiment]

Below, the present invention is described in more detail for the embodiment of the absorbent commodity based on above-mentioned the first embodiment and comparative example.The present invention is not limited to these embodiment.

As an example of the absorbent commodity in the present invention, use the Briefs type articles for wearing 100 shown in described Fig. 9 to evaluate.This Briefs type articles for wearing 100 by fixing by surface patch, back sheet, be configured in the absorbent main body 4 that absorber therebetween forms and the banded stretchable sheet as exterior body 111 extending along waistline direction in the end, front and back of absorbent main body 4 location forms, banded stretchable sheet carries out local engagement by heat sealing method, ultrasonic sealing method.The detailed content of this Briefs type articles for wearing 100 is described above.

Absorbent main body 4 has the face shaping of the general hourglass shape that the width of length 450mm, front ends width 180mm, rear end width 160mm, pars intermedia (becoming the middle section that crotch part divides when installation) is 120mm, back sheet is extended at least side at the absorber 3 shown in described Fig. 5, and elastomeric material directly or as different sheet material is configured on extension and realizes drip-preventing function.It should be noted that, in order to form the diaper of form shown in described Fig. 9, use between spun-bonded non-woven fabrics broad ways to dispose the composite sheet material of multiple wire elastic components as banded stretchable sheet in the end, front and back (being equivalent to the 3B in Fig. 5) of absorbent main body part, locating with the standing part (lap) of absorbent main body 4, reducing, lose because the cut-out based on elastic component, fixing rigidity etc. can make Telescopic.

Use the absorbent main body under the state because cutting off or remove the side spring function forfeiture that makes this absorbent main body to carry out every evaluation described later.

[embodiment 1]

As described in as shown in Fig. 2, on surface patch 1, dispose the first protuberance 11 and the second protuberance 12, the structure that the spacing that uses the first protuberance 11 and the second protuberance 12 is 4mm.This surface patch 1 is by combing operation after netted materialization, forms concavo-convex non-woven fabrics by the hot blast method that is configured as concaveconvex shape and carries out hot blast processing under net state.In its fiber, use and implemented and spinning NBF (SH) fiber (2.2dtex × 51mm) large based on the hydrophilic surface-treated carrying out with fibre finishing.

In sheet 2, use overleaf the 18g/m of polyethylene system ²moisture-inhibiting sheet.

In absorber 3, use following structure: under the structure shown in described Fig. 5 (2), rectangular-shaped high level ground amount portion paper pulp and absorbable polymer that the first level ground amount portion 31 is under the shape of ladder clathrate configuration are configured in to pars intermedia under admixture, utilize 2 16g/m that spiral helicine hot melt sticker are configured to multiple striateds in the mode not overlapping each other ²absorption paper clamp from surface patch 1 side and back sheet 2 sides, and be adjusted to the thickness of expectation.

Then, surface patch 1 and back sheet 2 are integrated by the hot melt sticker of this absorber 3, are made into evaluation sample.It should be noted that, the low level ground amount portion i.e. width of the second level ground amount portion 32 ((bottom) width of the recess extending along its length) is 5mm in both sides.

[embodiment 2]

Embodiment 2, except the shape of absorber being formed as to two low level ground amount portions shape that the second level ground amount portion 32 extends along the length direction shown in described Fig. 5 (1), makes similarly to Example 1.

[embodiment 3]

Embodiment 3 is formed as the width of low level ground amount portion 10mm except be formed as two low level ground amount portions shape that the second level ground amount portion 32 extends along the length direction shown in described Fig. 5 (1) in the shape of absorber 3 in, makes similarly to Example 2.

[embodiment 4]

The shape of the absorber of the surface patch that embodiment 4 uses is formed as the shape shown in Fig. 3, and the spacing (spacing of the first top 11T and the second top 12T) of the first protuberance 11 and the second protuberance 12 is 7.5mm.In addition, make similarly to Example 2.

[comparative example 1]

In surface patch 1, use following smooth hot-wind nonwoven cloth, this hot-wind nonwoven cloth and embodiment 1 use large and spinning NBF (SH) fiber (2.2dtex × 51mm) based on after the hydrophilic surface treatment of carrying out with fibre finishing in the same manner, make via combing operation, hot blast operation.Back sheet 2 uses the 18g/m of polyethylene system ²moisture-inhibiting sheet.As absorber 3, utilize the profile identical with embodiment 1, order to make flat (smooth) shape that normally used paper pulp and absorbable polymer is configured and do not had under admixture groove.Then, surface patch 1 and back sheet 2 are integrated by the hot melt sticker of this absorber 3, produce evaluation sample.

[comparative example 2]

In comparative example 2, as surface patch 1, in the surface patch 1 of comparative example 1, use the non-woven fabrics (ridge groove shape perforate) after the disclosed three-dimensional perforate of Japanese kokai publication hei 8-302555 communique.Aperture widths is 53mm (perforate 21 is listed as).Identical with comparative example 1 in addition.

Next, assay method and evaluation methodology are described.

The apparent thickness T1> of < surface patch

Three kinds of apparent thickness T1 in surface patch can measure to the profile status of the part at the second top across the first top by observing.Before section is observed, use the light compression test KES-G5 (trade name) that adds technology Co., Ltd. system, measure the 0.5g/cm of five positions, place ²shi Houdu, obtains meansigma methods, maximum and minima.In mensuration, use process of measurement, condition determination is set in the following manner.

Test portion: paper thin film,

SENS：1，

Measure load: 10g/cm ²,

Determination of the upper limit load: 50g/cm ²,

SPEED?RENGE：0.02cm/sec，

DEF sensitivity is more than surface patch place is adjusted into 2mm and below 20mm.

Next, use the blade (production code member FAS-10) of Feather Safety Shaver Co., Ltd.'s system to cut off surface patch 1, form the section of surface patch 1.Then, use the sweep electron microscope (model JCM-5100) of Jeol Ltd.'s system, the section cutting out is carried out to amplifying observation.Section is formed to view data or printed article, draw the supposition line of installed surface side at the summit place of the first top 11T and draw the supposition line of absorber 3 sides of drawing at the summit place at the second top 12T in parallel, measure the minimum range (length between the supposition line of the vertical line of drawing from supposition line) between parallel supposition line, using the measurement result obtaining as sheet apparent thickness.The amplification profile arriving according to the observation, determines rib portion 14, measures the apparent thickness and the height H c of cup portion of top 11T, 12T.Be determined at three positions, place and carry out above, the situation in minima-maximum that the meansigma methods of sheet apparent thickness is obtained in the mensuration by carrying out based on KES-G5 is made as effectively.

The assay method > of the thickness of < surface patch

Identical with above-mentioned apparent thickness, utilize above-mentioned sweep electron microscope to measure by amplifying observation.Taking the first protuberance 11 as example, measure and obtain thickness so that the sheet thickness of the face of the skin abutment face side of the top 11T of the first protuberance 11 and back sheet 3 sides contrary with it becomes minimum mode, be also identical for the second protuberance 12.For wall portion 13, owing to need to measuring from top 11T curve part, the incline direction line at top, the meansigma methods of the position of the height of the result of therefore position of the height of the distance skin abutment face side 1/3 in the height H c of cup portion being measured the normal direction of the skin abutment face side of wall portion 13 as the thickness of sheet and the distance skin abutment face side 2/3 in the height H c of cup portion is measured the normal direction of the skin abutment face side of wall portion 13 result as sheet thickness is as the thickness of wall portion 13.For the position of the height of 1/3 in surface patch and 2/3, can determine measuring position and determine by the method that enlarged image carrys out detect thickness by the method definite so that the first protuberance 11 of surface patch 1 and the second protuberance 12 become that enlarged image is contacted combination by the mode of a view data or from the general image of the first protuberance 11 and the second protuberance 12.

< fiber spacing is from >

Fiber spacing in the first top 11T and wall portion 13 is from being amplified in overhead view image and measured by the above-mentioned sweep electron microscope of use.Amplify along normal direction from surface patch 1 side at the first 11T place, top, amplify 1/3 position of the height H c of cup portion at 13 places of wall portion from nauropemeter dough sheet 1 side direction (normal direction of wall portion 13).In mensuration, more than multiplying power is made as to 50 times and below 300 times, in the region being surrounded by the fiber in rectangular extent, more than the mensuration number based on image analysis is adjusted into 20 and below 60, more than being preferably 30 and below 50.In the present invention, within the scope of the practical measurement of 700 μ m × 500 μ m, measure.It should be noted that, in image analysis, by practical measurement 0.5mm ²following as between small fiber structure and from number measure and fiber spacing from measure remove.Image analysis is by using the Image-Pro plus6.2Installation of the roper of Co., Ltd. system, from removing that each interfibrous area of fiber calculates value suitable with diameter of a circle and as fiber spacing from.Three positions, place for top 11T, 12T and wall portion 13 are measured and are calculated, using meansigma methods as average fiber spacing.It should be noted that, measure fiber spacing from time, using the whole fibers that can measure from surface patch 1 side to back sheet 3 sides as object, but local clear but in unsharp as a whole situation at the profile of the fiber for determining the region that surrounds of fiber, not only not as measure fiber spacing from fiber, also remove overall unsharp fiber.In addition, in the case of in cannot fully carrying out the state of binarization processing, image, printed article are modified to the state that can measure and measure.

In addition, according to fiber spacing from measurement result, the number ratio more than 40 μ m is calculated as percentage ratio.

< fibre orientation >

Fibre orientation is from the same manner the first top 11 and wall portion 13 being enlarged into overhead view image and using the image processing software NewQube[trade name of the nexus of Co., Ltd. with fiber spacing], described image is carried out to binarization.Next, be used as the Fiber Orientation Analysis8.13 Single (software name) of fibre orientation analysis program, from the determining image angle of orientation and the orientation intensity of described binarization.Be determined at top 11 and wall portion 13 and sentence identical multiplying power and carry out, with above-mentioned fiber spacing from mensuration time implement under approaching mensuration number scope.In addition, more at the unsharp position of profile of fiber, also can utilize above-mentioned image analysis, determine pars fibrosa and measure.In addition, be determined at the first top 11T in the orthogonal direction (90 ° ± 45 ° directions) of the MD direction of surface patch 1 on adjacent 13 places of wall portion carry out.The measurement of wall portion 13 is measured the imaginary line direction that links the first top 11T and the second top 12T from the vertical line direction of the wall portion face of surface patch as above-below direction (90 ° of orientation angles), the first top 11T is (0 ° of orientation angles) using the MD direction of surface patch 1 as above-below direction.

< absorber assay method >

The thickness of the absorber 3 of producing uses the non-contact laser displacement gauge (laser head LK-G30, displacement gauge LK-GD500 (trade name)) of Co., Ltd.'s Keyemce system to measure.It should be noted that, during by mensuration, pressure is made as 2.5g/cm ², measure more than two sample, try to achieve its meansigma methods.

In addition, the absorber 3 with the first level ground amount portion 31 and the second level ground amount portion 32 carries out patterning by actual measurement and the general image of the width of recess (bottom), and the area occupation ratio of recess is measured by above-mentioned image analysis apparatus.It should be noted that, also can carry out the overlapping measurement of topography.

The assay method > of < absorbent properties (liquid diffusibility)

At the length direction central part of absorber 3, the cylinder that width central part is placed internal diameter 35mm, maintain liquid taking the height of the position of the absorber 3 apart from filling liquid as the mode of 10mm, and as liquid and implantation concentration 0.005% carried out painted normal saline solution 40g by Amaranth.Possesses acrylic panel (thickness 5mm, length 250mm, width 100mm) at cylinder foot can cover the size of product entirety.

Measure the diffusion area of injecting the liquid after 10 minutes.

The mensuration of diffusion area is by the coloured part of absorber 3 is transferred to OHP thin film, and uses the Image-Pro plus6.2 Installation of the roper of Co., Ltd. system to carry out image analysis to measure.

The diffusion area that measurement result is expressed as liquid is wider, and the utilization ratio of absorber 3 is higher.

The algoscopy > of < level ground amount

Position that wish is measured (face component, absorber, high level ground amount portion, low level ground amount portion) is cut to 10cm × 10cm, tries to achieve by the quality of measuring this position.It should be noted that, be cut to 2cm × 2cm and try to achieve at the position that cannot cut 10cm × 10cm.

The algoscopy > of < density

Density is by utilizing said method to measure the level ground amount at the position of wish mensuration, and try to achieve divided by the thickness that utilizes described method to determine.

The bonding evaluation > of < surface patch and absorber

Taking the width middle section of above-mentioned each evaluation sample as width 50mm, length direction middle section cuts out rectangle as the mode of 250mm, make a side length direction end within the scope of 50mm, make to separate between surface patch 1 and absorber 2, use tensile testing machine (orientec society system, RTA100[trade name]), at the surface patch of top chuck side clamping separating part, measure peel strength at absorber 3 and the back sheet of bottom chuck side clamping separating part.It should be noted that, by being made as 50mm between chuck, measuring speed is made as to 50mm/ divides and carry out.Using chuck be spaced apart above and upper five positions, place below 160mm of 60mm peak value on average as peel strength, be that to make cementability more than 0.1cN and below 50cN time be to evaluate A in this peel strength, in addition for evaluating C.

Measurement result for above-mentioned each assessment item and evaluation result are illustrated in table 1.

[table 1]

The effect > of < embodiment

Evaluation result is as shown in Table 1 clearly known, has obtained following such result.

Embodiment 1～4 is all to link display fibers orientation in the top of the second protuberance and the direction of its peristome more than 82 ° and below 93 ° time in the angle of orientation of wall portion.The scope of peel strength more than 0.1cN and below 50cN in addition, the cementability of surface patch and absorber is for evaluating A.

The diffusion area of embodiment 1 liquid compared with comparative example 1,2 is larger, therefore known, can absorber 3 on a large scale in absorb liquid, utilization ratio is higher.In addition, there is the second level ground amount portion 32 of low level ground amount along length and width two directions by absorber 3 places at crotch part, easily flexibly bending in two directions.Consequently, improve the conformability with human body, therefore when for example as the more overnight hygienic band of excretion, diaper, even if measure under the state that thickness more and absorber 3 is thicker at paper pulp, SAP, also can improve conformability and reduce the sense of discomfort while dress.

The diffusion area of embodiment 2 liquid compared with comparative example 1,2 is larger, therefore can further improve the utilization ratio of absorber 3.Therefore, be difficult for being deposited in decanting point position because liquid becomes, therefore can reduce near the sense of sticking together decanting point, and prevent side leakage.In addition, because the second level ground amount portion 32 of the low level ground amount of the absorber 3 of crotch part is only positioned at length direction, therefore for example in action more daytime, absorber 3 is not fragile, and by there is low level ground amount portion on width, become and be difficult for hindering walking action, make to reduce wearer's sense of discomfort.

The diffusion area of embodiment 3 liquid compared with comparative example 1,2 is larger, therefore can further improve the utilization ratio of absorber 3.In addition, the second level ground amount portion 32 of the low level ground amount of the absorber 3 of crotch part is only in length direction and be large area, therefore can further improve the diffusibility of the liquid that slot part (recess 33) locates.Consequently, the utilization ratio of absorber 3 be can further improve, the paper pulp under identical leakage performance, the amount of super absorbent polymer (SAP) made to reduce.In addition, in the time wearing, because the amount region, high level ground (the first level ground amount portion 31) of absorber 3 is less at crotch part place, the sense of discomfort while therefore further reducing action.Therefore the baby diaper while, being applicable to daily-use sanitary towel, movable active high monthly age.

The apparent thickness of the surface patch 1 of embodiment 4 is thicker, and therefore the space between absorber 3 and skin is wider, is difficult for feeling to stick together.Therefore,, by using under the attitude of standing by day, can think raising dry sensation.In sum, the baby diaper while being applicable to daily-use sanitary towel, movable active high monthly age.

With above-mentioned embodiment and embodiment, the present invention is described in the lump; but as long as no being particularly limited; the present invention is not limited to any details of explanation, under the prerequisite of the not inventive concept shown in violation of a right claim and scope, should be interpreted as wide in range protection domain.

The application is based on advocating priority to the Japanese Patent Application 2011-286764 of Japan's proposition patent application on 27th at December in 2011, and a part for the record at this with reference to above-mentioned application and using its content as this description is enrolled.

Symbol description:

1 surface patch

2 back sheets

3 absorbers

11 first protuberances

12 second protuberances

11H, 12H peristome

11S, 12S inner space

11T, 12T top

13 wall portions

31 first level ground amount portions

32 second level ground amount portions

33 recesses

X first direction

Y second direction

W third direction

Z1 first surface side

Second side of Z2

Claims

1. an absorbent commodity, wherein,

It is lower and surround the second level ground amount portion of described the first level ground amount portion than described the first Ping Liangbuping amount that described absorber has the first level ground amount portion and level ground amount, the configuration of joining of the top of the second protuberance of this absorber and described surface patch,

And this absorber has from surface patch side depression described in described back sheet side direction and with the recess of the flute profile of extending at least along its length of described the second Liang Buwei bottom surface, level ground,

2. absorbent commodity according to claim 1, wherein,

The orientation of described wall portion has from the top of described the second protuberance radial fibre orientation toward the outer side.

3. absorbent commodity according to claim 1 and 2, wherein,

Fiber with the face direction from described wall portion along the face of described surface patch in the scope of described the second protuberance towards the top of described the second protuberance and the mode of shrinking be orientated.

4. according to the absorbent commodity described in any one in claims 1 to 3, wherein,

Described the first protuberance and described the second protuberance have the inner space with its appearance similar and at top with the frustum of a cone or the hemisphere of fillet.

5. according to the absorbent commodity described in any one in claim 1 to 4, wherein,

Described inner space separates via the rib portion at the first top that links adjacent described the first protuberance, forms discontinuous space.

6. according to the absorbent commodity described in any one in claim 1 to 5, wherein,

The face of the described absorber of described surface patch side is tabular surface.

7. according to the absorbent commodity described in any one in claim 1 to 6, wherein,

Described the first level ground amount portion and described the second level ground amount portion are in a ratio of high density.

8. according to the absorbent commodity described in any one in claim 1 to 7, wherein,

The density of described the first level ground amount portion is 0.03g/cm ³above and 0.50g/cm ³below.

9. according to the absorbent commodity described in any one in claim 1 to 8, wherein,

The density of described the second level ground amount portion is 0.01g/cm ³above and 0.15g/cm ³below.

10. according to the absorbent commodity described in any one in claim 1 to 9, wherein,

The fibre weight of described wall portion is fewer than the fibre weight at each top of described the first protuberance, described the second protuberance.

11. according to the absorbent commodity described in any one in claim 1 to 10, wherein,

Described in the density ratio at the top of described the first protuberance, described the second protuberance, the density of wall portion is high.

12. according to the absorbent commodity described in any one in claim 1 to 11, wherein,

The thickness of the described surface patch at the top of described the first protuberance, the top of described the second protuberance and each several part place of described wall portion is formed as, and described wall portion is than the top thin of the top of described the first protuberance and described the second protuberance.

13. according to the absorbent commodity described in any one in claim 1 to 12, wherein,

The thickness at the top of described the first protuberance is more than 0.5mm and below 2.0mm, the thickness at the position of the face 1/3 of the distance skin side of described wall portion is that 0.1mm is above and below 0.7mm, is that 0.5mm is above and below 1.0mm apart from the thickness at the position of the face 2/3 of skin side.

14. according to the absorbent commodity described in any one in claim 1 to 13, wherein,

The average fiber spacing of described wall portion than the fiber spacing at the top of described the first protuberance from length.

15. according to the absorbent commodity described in any one in claim 1 to 14, wherein,

The average fiber spacing at the top of described the first protuberance is more than 1 μ m and below 40 μ m.

16. according to the absorbent commodity described in any one in claim 1 to 15, wherein,

The average fiber spacing of described wall portion is that 10 μ m are above and below 100 μ m.

17. according to the absorbent commodity described in any one in claim 1 to 16, wherein,

The top of described the second protuberance and described absorber are fixed by hot melt material.

18. according to the absorbent commodity described in any one in claim 1 to 17, wherein,

Described absorber is made up of three parts on its length direction, disposes multiple the first recesses in the first absorbent portion that is divided into pars intermedia, the inner side in the side week of described the first absorbent portion under each the first recess is positioned at and overlooks, mainly alongst configuration.

19. according to the absorbent commodity described in any one in claim 1 to 18, wherein,

Described absorber is made up of three parts on its length direction, comprise be divided into pars intermedia the first absorbent portion, be configured in the first absorbent portion side's side the second absorbent portion and be configured in the 3rd absorbent portion of the opposing party's side of the first absorbent portion, in described the second absorbent portion, described the 3rd absorbent portion, dispose respectively the second recess, the 3rd recess, described the second recess, described the 3rd recess are respectively along the direction configuration of tilting with respect to length direction.

20. a Briefs type articles for wearing, it has the veutro portion of the veutro that is configured in wearer, the drosal part that is configured in the lower crotch of crotch part and is configured in dorsal part, and the side edge part of veutro portion engages and is formed as Briefs type with the side edge part of drosal part, wherein,

Configure the described absorbent commodity described in any one in described claim 1 to 19 at described crotch part.