CN101152115A

CN101152115A - Absorbency substance

Info

Publication number: CN101152115A
Application number: CNA2007101618815A
Authority: CN
Inventors: 广濑祐一
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2006-09-27
Filing date: 2007-09-27
Publication date: 2008-04-02
Anticipated expiration: 2027-09-27
Also published as: KR20080028771A; TW200836702A; CN101152115B; TWI411428B; JP4785693B2; KR101389693B1; JP2008079747A

Abstract

The feminine napkin (1) of the invention is provided with a front side sheet (2), a back side sheet (3) and an absorbing body (4) arranged between the two sheets, and is in long shape. Wherein, the absorbing body (4) is formed by cascading an upper layer absorbing body (41) on a lower layer absorbing body (42), and the upper layer absorbing body (41) is integrated with the lower layer absorbing body (42) at least at the central part of the upper layer absorbing body (41) via a plurality of deep convex parts (5, 5......).

Description

Absorbent commodity

Technical field

The present invention relates to absorbent commodity, especially absorbent commodity such as sanitary napkin, incontinence pad.

Background technology

In the past, in absorbent commodities such as sanitary napkin, known a kind of for improve make with the stickiness of health and anti-leakage absorber at central part outstanding or from central part to buttocks outstanding product.The purpose of this absorbent commodity is: prevent to produce the space between the skin of its skin contact surface and wearer, reduce body fluid and flow through on the skin of the skin contact surface of absorbent commodity or wearer and spill.In addition, in this absorbent commodity, following product is arranged: high portion during absorber has, the skin contact surface of absorbent commodity and the stickiness between the excretory portion are improved during wearing.

There is situation about for example forming by stacked upper strata absorber on lower floor's absorber in high portion in the absorber.In addition, only increase the thickness of the central part of absorber in addition, thus make have in the absorber of high portion situation about forming.Which kind of situation no matter, in high portion all be body fluid by direct excretory position, and in the position relative with the body fluid excretory portion of wearer, the thickness of absorber forms greatlyyer than other position.

For example, open in the flat 5-24025 communique in fact, disclose the sanitary napkin that on lower floor's absorber, is formed with the upper strata absorber in Japan.In addition, in TOHKEMY 2003-33397 communique, disclose have formed in the sanitary napkin of absorber of high portion.

Summary of the invention

Absorbent commodity of the present invention possesses face sheet, back-sheet and the absorber between two sheet materials, and be essentially elongate shape, wherein, above-mentioned absorber stacked one or more upper stratas absorber on the skin contact surface of lower floor's absorber forms; One or more above-mentioned upper stratas absorber engages integrated by a large amount of dark recesses with above-mentioned lower floor absorber at the central part of this upper strata absorber at least; Above-mentioned dark recess is not formed on the above-mentioned back-sheet, but cave in towards the skin contact surface one side formation of above-mentioned upper strata absorber from non-skin contact surface one side of above-mentioned lower floor absorber, and run through above-mentioned lower floor absorber on its thickness direction, the bottom of above-mentioned dark recess is positioned at above-mentioned upper strata absorber.

In above-mentioned absorbent commodity, preferably the place outside the part that is laminated with above-mentioned upper strata absorber of above-mentioned lower floor absorber is formed with a large amount of shallow recess; Above-mentioned lower floor absorber is formed with the embossing groove that extends along this length direction in the outside separately, both sides of the edge of the length direction of the above-mentioned absorbent commodity of above-mentioned upper strata absorber, above-mentioned face sheet and above-mentioned lower floor absorber close integrated by this embossing fillistered joint.

Description of drawings

Fig. 1 is the vertical view of expression as an embodiment of the sanitary napkin of absorbent commodity of the present invention.

Fig. 2 is the X-X line amplification profile of the sanitary napkin of Fig. 1.

Fig. 3 is the vertical view that the embossing groove in the sanitary napkin of Fig. 1 is amplified expression.

Fig. 4 is the vertical view that is formed with the zone of shallow recess in the sanitary napkin of presentation graphs 1.Fig. 5 (a) is the vertical section axonometric chart of a part of face sheet that amplifies the sanitary napkin of presentation graphs 1.

Fig. 5 (b) amplifies the Y-Y line amplification profile shown in Fig. 5 (a) of a part of face sheet of sanitary napkin of presentation graphs 1.

The specific embodiment

Above-mentioned sanitary napkin is owing to high portion in having, so the Liquid Absorption of central part keeps performance than other position height.But, since in the thickness of absorber of high portion form greatlyyer, keep performance so can not give full play to the Liquid Absorption of the whole thickness direction of absorber sometimes.For example, the body fluid in being excreted in the high portion sometimes can not be from its skin contact surface one side promptly toward non-skin contact surface one side shifting, the dry feeling when being difficult to obtain to dress sanitary towel in this case.

In addition, in in the high portion, even if excretory body fluid is from promptly past non-skin contact surface one side shifting of its skin contact surface one side, the body fluid that absorbs in the central part of absorber can not fully spread in the outside towards absorber in absorber, keeps performance so can not give full play to the Liquid Absorption of whole absorber sometimes.

Therefore, the present invention relates to a kind of absorber that constitutes by multilamellar that has, liquid moving rapidly from skin contact surface one side toward non-skin contact surface one side, liquid is good in the intravital diffusibility of absorption, dresses comfort excellent absorption article.

According to the absorbent commodity with the absorber that constitutes by multilamellar of the present invention, liquid moving rapidly from skin contact surface one side toward non-skin contact surface one side, liquid is good in the intravital diffusibility of absorption, and the wearing comfort is good.

Below, according to its embodiment preferred, absorbent commodity of the present invention is described with reference to accompanying drawing.

As Fig. 1-shown in Figure 5, the absorbent commodity 1 of the present embodiment is a sanitary napkin, possess the back-sheet 3 of face sheet 2, breathability and liquid impermeability of liquid permeability and the absorber 4 of the liquid retainability between two sheet materials, and be essentially elongate shape.

Absorber 4 in the sanitary napkin of the present embodiment (the following sanitary towel that also only is called) is stacked upper strata absorbers 41 and form on the skin contact surface of lower floor's absorber 42, this upper strata absorber 41 at least at the central part of this upper strata absorber 41 by a large amount of

dark recesses

5,5 ... engage integrated with lower floor absorber 42.

In addition, in lower floor's absorber 42 of the sanitary towel 1 of the present embodiment, place outside the part that is laminated with upper strata absorber 41 is formed with a large amount of

shallow recess

6,6 ... lower floor's absorber 42 is formed with the embossing groove 7 that extends along this length direction in both sides of the edge 41a, the 41a outside separately of the length direction (the following sanitary towel's length direction that also only is called) of the sanitary towel 1 of upper strata absorber 41, face sheet 2 and lower floor's absorber 42 engage integrated by this embossing groove 7.

Sanitary towel 1 to the present embodiment further specifies below.

Sanitary towel 1 is divided into the excretory portion subtend B of portion (having part with the excretory portion subtend zone of the relative configuration of fluid drainage portion of wearer in width central authorities) and the back quadrate part C of front part A, length direction middle section on its length direction.

Face sheet 2 and back-sheet 3 are respectively elongate shape, and its length direction is consistent with the length direction (the following sanitary towel's length direction that also only is called) of sanitary towel 1.Face sheet 2 has formed the skin contact surface that contacts with the skin of wearer when dressing sanitary towel.

Absorber 4 is an elongate shape, and its length direction is consistent with sanitary towel 1.As shown in Figure 2, absorber 4 is clamped and fixed between face sheet 2 and the back-sheet 3 with the state that is coated in the platform paper 9.

In addition, face sheet 2 and back-sheet 3 are stretched out from the length direction front and back end of absorber 4 respectively, are bonded with each other by known joint methods such as heat seals at its extension, thereby have formed end seal portion.In addition, face sheet 2 and back-sheet 3 are stretched out from the width two ends of absorber 4 respectively, similarly engage.

Below absorber 4 is further specified.

As depicted in figs. 1 and 2, absorber 4 has the stepped construction of upper strata absorber 41 and 42 formation of lower floor's absorber.Upper strata absorber 41 and lower floor's absorber 42 are respectively elongate shape, and its length direction is consistent with the sanitary towel length direction.Upper strata absorber 41 and lower floor's absorber 42 preferably formed by paper pulp fiber etc. respectively.

Lower floor's absorber 42 is littler and be roughly the same shape than sanitary towel 1.The size of upper strata absorber 41 is that length and width form forr a short time than lower floor absorber 42 respectively.Upper strata absorber 41 is layered in skin contact surface one side (health face one side) at the central part of lower floor's absorber 42, formed absorber 4 in high portion.Specifically, upper strata absorber 41 is disposed at the central part of the width (the following napkin width direction that also only is called) of the sanitary towel 1 of the excretory portion subtend B of portion, and quadrate part A and back quadrate part C stretch out forward respectively in the front and back end portion of this upper strata absorber 41.Be that upper strata absorber 41 extends to back quadrate part C from front part A by the excretory portion subtend B of portion.Upper strata absorber 41 is relative with the body fluid excretory portion of wearer when dressing sanitary towel, is the position that the body fluid of face sheet 2 has been passed through in acceptance.

Upper strata absorber 41 is by a large amount of

dark recesses

5,5 ... engage with lower floor absorber 42.In the present embodiment, upper strata absorber 41 in the central between portion and the whole periphery also by

dark recess

5,5 ... integrated with lower floor absorber 42.Dark recess 5 is to overlook circle, forms dispersedly and discontinuously, forms the configuration pattern of the shape that is staggered as a whole.In the present embodiment,

dark recess

5,5 ... form by embossing respectively.

As shown in Figure 2, each

dark recess

5,5 ... be not formed on the back-sheet 3, but cave in towards the skin contact surface one side formation of upper strata absorber 41 from non-skin contact surface one side of lower floor's absorber 42, and on its thickness direction, run through this lower floor's absorber 42, its bottom (part that caves in most in the dark recess 5) is positioned at this upper strata absorber 41.That is each

dark recess

5,5 ... by absorber 4 (upper strata absorber 41, lower floor's absorber 42) depression is formed, so be formed up to the inside of upper strata absorber 41 from non-skin contact surface one side of lower floor's absorber 42.In dark recess 5, a part of fiber that constitutes lower floor's absorber 42 is compacted into one with the state that enters in the upper strata absorber 41 with the fiber that constitutes this upper strata absorber 41.

Upper strata absorber 41 and lower floor's absorber 42 are by a large amount of

dark recesses

5,5 ... engage, integrated with the state of driving fit.

Each

dark recess

5,5 ... above-mentioned bottom be positioned at upper strata absorber 41 as mentioned above, each

dark recess

5,5 ... on its thickness direction, do not run through upper strata absorber 41.Each

dark recess

5,5 ... above-mentioned bottom be preferably placed at from upper strata absorber 41 skin contact surface (the skin contact surface of absorber 4) downwards (non-skin contact surface one side) distance of leaving be equivalent to the position of 10-80% of the thickness of this upper strata absorber 41, more preferably be positioned at the position that the distance of leaving is equivalent to the 20-50% of this thickness.Each dark recess 5,5 ... above-mentioned bottom be positioned at this position, then upper strata absorber 41 and lower floor's absorber 42 can not become extremely stiff, and lower floor's absorber 42 is entered in the upper strata absorber 41 effectively, this two-

layer

41,42 further can be compacted into one.

Upper strata absorber 41 and lower floor's absorber 42 formation separately the part of dark recess 5, constitute respectively that the fiber of this absorber is compacted, density increases.Dark recess 5 has been owing to compacting has improved capillary force, be delivered to the drain path of lower floor's absorber 42 and work from upper strata absorber 41 as liquid, and the liquid in the upper strata absorber 41 is in the also raising simultaneously of diffusibility of in-plane.

Never can make upper strata absorber 41 and lower floor's absorber 42 too stiff, effectively give the viewpoint of these two-

layer

41,42 capillary forces and set out, the density that has formed the part of dark recess 5 is preferably 0.2-1.2g/m ³, 0.35-0.6g/m more preferably ³Wherein, " formed the density of the part of dark recess 5 " and be meant the density in the zone between the skin contact surface (the skin contact surface of absorber 4) of the above-mentioned bottom that is positioned at dark recess 5 and upper strata absorber 41.

On the other hand, the density of above-mentioned " having formed the part of dark recess 5 " part in addition of absorber 4 is littler than being somebody's turn to do " having formed the part of dark recess 5 ", is preferably 0.01-0.4g/m ³, 0.02-0.2g/m more preferably ³

Above-mentioned density (density at the regulation position of absorber) is obtained by following method.Promptly, the absorber of mass area ratio has been measured at the position of measuring density in hope in advance along the thickness direction cut-out of this absorber, observe its section with microscope (the digital microscope VH-8000 of KEYENCE system) and measure the thickness at position, calculate the density at this position by the mass area ratio of this Determination of thickness value and absorber to measure this hope.From avoid as far as possible section with its near absorber structure with cut off before compare the viewpoint that changes, sharp cutter (for example, FEATHER safety razor Co., Ltd. system FAS-10) is preferably used in the cut-out of absorber.

Has a large amount of

dark recess

5,5 ... absorber 4 for example can followingly make.At first, (on the skin contact surface) stacked upper strata absorber 41 on lower floor's absorber 42 and form duplexer, then, be subjected to the mode of embossing processing to deliver to embossing device and implement embossing and process according to its non-skin contact surface one side joint this duplexer, this embossing device possesses on periphery rule and disposes embossing with the knurling rolls of protuberance and the carrying roller of relative configuration with it.In this embossing processing, preferably regulate the interval between knurling rolls and the carrying roller, the height that protuberance is used in embossing etc. so that embossing arrives the inside of upper strata absorber 41 with protuberance.

In addition, as shown in Figures 2 and 3, on lower floor's absorber 42, the regional Q of the Rack outside the entire circumference edge of part that is laminated with upper strata absorber 41 and upper strata absorber 41, be formed with a large amount of

shallow recess

6,6 ...In Fig. 4, represent to have formed in lower floor's absorber

shallow recess

6,6 with oblique line ... region R.In Fig. 4, regional Q is the part that is clipped in upper strata absorber 41 stacked and has formed

shallow recess

6,6 ... region R between part.In the present embodiment, each

shallow recess

6,6 ... form by embossing.

In this manual, " deeply " and " shallow " of shallow recess 6 of so-called dark recess 5 are respectively the meanings that concave depth is distinguished relatively.Further specify below, in the present embodiment, dark recess 5 forms according to making upper strata absorber 41 and lower floor's absorber 42 engage incorporate mode, and shallow recess 6 only is formed on lower floor's absorber 42.

Shallow recess 6 is to overlook circle, forms dispersedly and discontinuously, forms the configuration pattern of the shape that is staggered as a whole.In the present embodiment, shallow recess 6 disposes according to the mode of the distance between the shallow recess 6 less than the distance between the dark recess 5.This is in order to give the capillary force gradient between dark recess area and the shallow recess zone, to have the further promotion liquid function of side shifting outwardly.As other method of giving such capillary force gradient, can also use the area that increases each recess, improve the method for the ratio of the recess in the absorber 4.

As shown in Figure 2, each

shallow recess

6,6 ... according to the mode that the inside of this lower floor's absorber 42 exerts an influence being formed from non-skin contact surface one side of lower floor's absorber 42.Each

shallow recess

6,6 ... non-skin contact surface one side at lower floor's absorber 42 has formed recess.In the formation of lower floor's absorber 42 part of shallow recess 6, the fiber that constitutes this absorber is compacted, thereby becomes high density, capillary force is improved.In addition, each

dark recess

5,5 ... form than each

shallow recess

6,6 ... deeply.

Has a large amount of

shallow recess

6,6 ... and has a large amount of

dark recess

5,5 ... absorber 4 for example can followingly make.A large amount of

dark recess

5,5 will have been formed ... absorber 4 be subjected to the mode of embossing processing to deliver to embossing device and implement embossing and process according to its non-skin contact surface one side joint, this embossing device possesses on periphery rule and disposes embossing with the knurling rolls of protuberance and the carrying roller of relative configuration with it.In this embossing processing, preferably on knurling rolls, be provided with do not exist embossing with the zone of protuberance so that embossing only arrives the inside of lower floor's absorber 42 with protuberance.Also preferably regulate the interval between knurling rolls and the carrying roller, the height that protuberance is used in embossing etc.In addition, also can on lower floor's absorber 42, form a large amount of

shallow recess

6,6 ... afterwards, stacked upper strata absorber 41 and this lower floor's absorber 42, and on this duplexer, form a large amount of

dark recesses

5,5 ...

In addition, knurling rolls one side (being skin contact surface one side among Fig. 2) of absorber 4 that has formed the part of dark recess 5 or shallow recess 6 sometimes caves in from carrying roller one side (being non-skin contact surface one side Fig. 2).Can think that this is to have formed the in stable condition of each above-mentioned embossed portion owing to constitute the fiber of skin contact surface one side of absorber 4 in order to make, cause towards non-skin contact surface one side shifting, because the influence that compacting produces also feeds through to non-machined surface one side, so have the drain effect.

Below embossing groove 7 is further specified.

On lower floor's absorber 42, a pair of

embossing groove

7,7 is formed on the both sides of upper strata absorber 41.As Fig. 2 and shown in Figure 4, a pair of

embossing groove

7,7 is formed on the regional Q that is not formed with shallow recess 6.That is, on the regional Q that has formed embossing groove 7, be not formed with shallow recess 6.

As shown in Figure 3, a pair of

embossing groove

7,7 has following shape respectively: the shape that part 7a, 7b, the 7c that becomes convex towards the outside curve of the width of sanitary towel 1 links to each other along length direction three parts of sanitary towel 1.The center part 7b that bends to convex is positioned at the outside of napkin width direction in the excretory portion subtend zone (central part of the napkin width direction of the excretory portion subtend B of portion) of sanitary towel 1.Part 7b is positioned at the outside of lateral edges 41a of the length direction of upper strata absorber 41 in the excretory portion subtend B of portion.

Further specify below.The end, front and back of a pair of

embossing groove

7,7 length direction separately links together by the embossing groove that extends along the napkin width direction.This embossing groove that extends along the napkin width direction has the shape of protruding towards the outside of sanitary towel's length direction.That is, on lower floor's absorber 42, formed and comprised the ring-type embossing groove of a pair of

embossing groove

7,7 in interior closure.

In addition, face sheet 2 engages integrated by above-mentioned cyclic embossing groove with lower floor absorber 42.

In the part of above-mentioned cyclic embossing groove, thereby the fiber that constitutes lower floor's absorber 42 is compacted the density increase, so rigidity is improved.In addition, have shape and the cyclic shape of protruding towards the outside of sanitary towel's length direction.Therefore, in the part of lower floor's absorber 42 of this cyclic embossing groove inboard, the stability of its face shape is high, can suppress to exist the generation of a plurality of concavo-convex wrinkles or wrinkle.Moreover, since upper strata absorber 41 be bonded on above-mentioned cyclic embossing groove inboard lower floor's absorber 42 part above, so the integraty of upper strata absorber 41 and lower floor's absorber 42 has improved stability by the joint of dark recess 5 and groove in whole use.

Therefore, the body fluid that absorbs in the upper strata absorber 41 also moves in the incorporate lower floor absorber 42 towards the adaptation height with this upper strata absorber 41 rapidly, at first absorbs the central part that remains on absorber 4.At this moment, body fluid mainly as the drain path dark recess 5,5 ... middle transmission is also moved.In addition, as Fig. 2 and shown in Figure 4, owing to formed dark recess 5 from lower floor's absorber 42 1 sides, so at periphery with dark recess 5, the density of lower floor's absorber 42 forms than the bigger tendency of the density of upper strata absorber 41, can further improve the drain effect in lower floor's absorber 42.

The body fluid that absorb to keep in the central part of absorber 4 in above-mentioned zone Q, thereby via being compacted the high above-mentioned cyclic embossing groove of capillary force, move to above-mentioned region R in the inside of lower floor's absorber 42 towards the outside of absorber 4.And then the body fluid that moves to region R is in a large amount of

shallow recess

6,6 ... the middle transmission further spread towards the outside of lower floor's absorber 42, so the absorbent properties of lower floor's absorber 42 are utilized effectively.As a result, can keep the kilter that body fluid moves rapidly to lower floor's absorber 42 from upper strata absorber 41.

In addition, above-mentioned groove is owing to formed the convex that bloats laterally in excretory portion subtend area B, so in the central, the diffusion of the side direction of the body fluid of arrival groove is slow, in a single day body fluid contact groove, just the length direction towards the high groove of density spreads, and is carried out the maintenance and the diffusion of body fluid by shallow recess 6.On the other hand, at the front part of excretory portion subtend area B and back quadrate part, body fluid carries out quickly to the diffusion ratio of groove, preponderates to the diffusion of the length direction of groove, compares with central part, and it is slower that body fluid arrives shallow recess 6.That is, the position of the groove among regional Q relation is different, and in the central authorities of excretory portion subtend area B, groove distance shallow recess 6 is nearer, and in the front and back of excretory portion subtend area B, and the dark recess of groove distance 5 is nearer.Therefore, the liquid retainability height of central part not only, and inappropriate situation such as can suppress that liquid returns, and then can be suppressed at side direction, seepage obliquely.

In addition, when the amount of excretory body fluid waits more for a long time, the part of excretory body fluid directly absorbs in lower floor's absorber 42 by above-mentioned cyclic embossing groove sometimes on the face sheet 2.

The size of the sanitary towel 1 of the present embodiment etc. preferably suitably designs according to its concrete purposes.In addition, also preferred size and its concrete purposes according to sanitary towel 1 such as size of upper strata absorber 41, lower floor's absorber 42, dark recess 5, shallow recess 6 and embossing groove 7 suitably design.

For example, when sanitary towel 1 being used for be preferably as follows design sanitary towel 1 through long-time occasions of using such as blood volume occasion how or nights.

The size of sanitary towel 1 is: length is preferably 20-50cm, is preferably 27-50cm especially, and width is preferably 5-10cm, is preferably 7-10cm especially.

The size of upper strata absorber 41 is: length is preferably 5-20cm, is preferably 7-17cm especially, and width is preferably 2-4.5cm, is preferably 2.5-3.5cm especially.In addition, the mass area ratio of upper strata absorber 41 is preferably 100-1000g/m ², be preferably 150-600g/m especially ²

The size of lower floor's absorber 42 is: length is preferably 15-50cm, is preferably 25-45cm especially, and width is preferably 5-10cm, is preferably 7-10cm especially.In addition, the mass area ratio of lower floor's absorber 42 is preferably 100-600g/m ², be preferably 150-300g/m especially ²

In addition, the diameter of dark recess 5 is preferably 0.8-4mm, is preferably 1-3mm especially.Distance between the dark recess 5 (for example, in the heart distance) is preferably 2-10mm on sanitary towel's length direction, be preferably 3-7mm especially, is preferably 2-10mm on the napkin width direction, is preferably 3-7mm especially.In addition, the degree of depth of dark recess 5 is preferably 2-50% with respect to the thickness that is laminated with the part of upper strata absorber 41 in the absorber 4, is preferably 10-40% especially.

The diameter of shallow recess 6 is preferably 0.8-4mm, is preferably 1-3mm especially.In addition, the distance between the shallow recess 6 (for example, in the heart distance) is preferably 2-10mm on sanitary towel's length direction, be preferably 3-7mm especially, is preferably 2-10mm on the napkin width direction, is preferably 3-7mm especially.In addition, the degree of depth of shallow recess 6 is preferably 2-50% with respect to the thickness of lower floor's absorber 42, is preferably 10-40% especially.

In addition, when overlooking lower floor's absorber 42, the width of the regional Q in the outside, the entire circumference edge of upper strata absorber 41 is preferably 5-15mm, is preferably 7-12mm especially.This width of zone Q then can be constant as long as in above-mentioned scope, also can change.

Moreover the width of embossing groove 7 is preferably 0.5-4mm, is preferably 0.8-2mm especially.

Below, each material of the sanitary towel 1 that forms the present embodiment is described.

At first, as the formation material of face sheet 2, so long as the sheet material of liquid permeability then is not particularly limited, preferably use Fig. 5 (a) for example and (b) shown in have towards the concavo-convex sheet material of the side-prominent a large amount of protuberances 24 of skin contact surface one.

The face sheet 2 that is made of concavo-convex sheet material in the present embodiment is made of first fibrous layer 21 of skin contact surface one side and second fibrous layer 22 of non-skin contact surface one side.First fibrous layer 21 and second fibrous layer 22 by the melt bonded heat fusing bonding part 23 that formed of localized heat as recess.The position of first fibrous layer 21 beyond heat fusing bonding part 23 formed the protuberance 24 that has the elasticity of compression in a large number.

Above-mentioned concavo-convex sheet material can obtain by the following method: first fibrous layer 21 that will constitute by fiber assembly by heat embossing and second fibrous layer 22 according to the rules the pattern localized heat melt bonded after, make the 22 along continuous straight runs thermal contractions of second fibrous layer.Specifically, bonding for example following the carrying out of heat fusing that is undertaken by heat embossing: the embossing face (circumferential surfaces of knurling rolls) that rule is equipped with a large amount of embossing pins is crimped on first fibrous layer, 21 1 sides of the duplexer of first fibrous layer 21 and second fibrous layer 22, makes by the formation fibers melt of first fibrous layer 21 at each pin institute hot pressing position and/or second fibrous layer 22.

The thermal contraction of second fibrous layer 22 is for example following to be carried out: constituted second fibrous layer 22 or made in second fibrous layer 22 by the heat-shrinkable fiber in advance and contain the heat-shrinkable fiber, make first fibrous layer 21 and second fibrous layer adherent while of 22 heat fusings or make both heat fusings bonding after, second fibrous layer 22 is carried out heat treated.A large amount of protuberance 24 following formation: make heat fusing bonding part 23 position in addition of first fibrous layer 21 be deformed into convex by making the 22 along continuous straight runs thermal contractions of second fibrous layer.

Form to a large amount of heat fusing bonding part 23 preference rule loose point-like and zigzag.Between the heat fusing bonding part 23 apart from constant.

It is spherical that each protuberance 24 forms semicircle respectively, and its inside has been full of the fiber that constitutes first fibrous layer 21.In addition, the interface that has formed first fibrous layer 21 of part of each protuberance 24 and second fibrous layer 22 is not in and engages and the state of driving fit.

The formation fiber of first fibrous layer 21 does not preferably have heat-shrinkable in fact or fiber that can thermal contraction below the heat shrink temperature of the formation fiber of second fibrous layer 22.

Formation fiber as second fibrous layer 22 is preferably the fiber that is constituted and had heat-shrinkable by thermoplastic, polymeric materials.In addition, this formation fiber is preferably the fiber of the body behavior that also demonstrates flexibility after the contraction.As the example of this fiber, can list the potential crimping property fiber.Potential crimping property fiber in second fibrous layer 22 contain the proportional 40-100 of being preferably weight %.The potential crimping property fiber is can similarly handle with the fiber that existing non-woven fabrics is used before being heated, and shows spiral helicine curling by the heating under the set point of temperature, thereby has the fiber of retractable property.By using the potential crimping property fiber, can show heat-shrinkable and elastomer behavior simultaneously.

The potential crimping property fiber is by being that the eccentric core-sheath-type composite fibre or the parallel composite fiber of composition constitutes with two kinds of different thermoplastic, polymeric materials of shrinkage factor for example.As its example, can list the spy and open flat 9-296325 communique and specially permit the fiber of putting down in writing in No. 2759331 communique.Second fibrous layer 22 for example can make it contain above-mentioned potential crimping property fiber in advance, with the adherent while of the heat fusing of first fibrous layer 21 or thereafter, it is curling by heating this fiber to be shown, and makes its contraction.

In addition, as the formation material of back-sheet 3, upper strata absorber 41 and lower floor's absorber 42 of the sanitary towel 1 that constitutes the present embodiment, can use the material that uses in the absorbent commodity in the past.

According to the sanitary towel 1 of above-mentioned the present embodiment, body fluid moves rapidly from non-skin contact surface one side of skin contact surface one side direction, so dry feeling is good.In addition, owing to can effectively utilize the absorbent properties of lower floor's absorber 42, be preferred for especially through long-time occasions of using such as blood volume occasion how or ights.

Absorbent commodity of the present invention is not limited to above-mentioned embodiment, only otherwise exceeding content of the present invention then can carry out appropriate change.

For example, article of the present invention also can have a plurality of upper stratas absorber.At this moment, a plurality of these upper strata absorbers can be layered in respectively on the thickness direction of absorbent commodity, and in addition, a plurality of these upper strata absorbers also can be configured in respectively on the length direction or width of absorbent commodity.

In addition, in the sanitary towel 1 of the present embodiment, absorber 4 is that the state with stacked upper strata absorber 41 on lower floor's absorber 42 is covered by in the platform paper 9, but from the viewpoint of the processability of sanitary towel 1, upper strata absorber 41 and lower floor's absorber 42 also can cover with the platform paper bag respectively.

Moreover the sanitary towel 1 of the present embodiment also can have a pair of alar part on the excretory portion subtend B of portion.In addition, sanitary towel 1 also can have a pair of side leakage barriers on the both sides of sanitary towel's length direction of skin contact surface one side.In addition, sanitary towel 1 also has a pair of rear flap portion on the B of portion in the wings.

In addition, absorbent commodity of the present invention can be a sanitary napkin, but also can be underwear back boxing or incontinence pad etc.

Claims

1. absorbent commodity, it possesses face sheet, back-sheet and the absorber between two sheet materials, and is essentially elongate shape, and wherein, described absorber stacked one or more upper stratas absorber on the skin contact surface of lower floor's absorber forms; One or more described upper stratas absorber engages integrated by a large amount of dark recesses with described lower floor absorber at the central part of this upper strata absorber at least; Described dark recess is not formed on the described back-sheet, but cave in towards the skin contact surface one side formation of described upper strata absorber from non-skin contact surface one side of described lower floor absorber, and run through described lower floor absorber on its thickness direction, the bottom of described dark recess is positioned at described upper strata absorber.

2. absorbent commodity according to claim 1, wherein, the place outside the part that is laminated with described upper strata absorber of described lower floor absorber is formed with a large amount of shallow recess; Described lower floor absorber is formed with the embossing groove that extends along this length direction in the outside separately, both sides of the edge of the length direction of the described absorbent commodity of described upper strata absorber, described face sheet and described lower floor absorber close integrated by this embossing fillistered joint.

3. absorbent commodity according to claim 2 wherein, does not form described shallow recess on the zone that is formed with described embossing groove.

4. according to claim 2 or 3 described absorbent commodities, wherein, have the described upper strata absorber of an elongate shape, this upper strata absorber layers is stacked in the central part of described lower floor absorber.

5. absorbent commodity according to claim 4, wherein, described embossing groove has following shape: the part one or more continuous shapes on the described length direction of this absorbent commodity that become convex towards the outside curve of the width of described absorbent commodity; And the described part that bends to convex is positioned at the outside in the excretory portion subtend zone of described absorbent commodity.

6. according to claim 2,3 or 5 described absorbent commodities, wherein, described shallow recess forms from non-skin contact surface one side of described absorber.