CN103402476B

CN103402476B - Hygroscopicity furnishings

Info

Publication number: CN103402476B
Application number: CN201280010582.0A
Authority: CN
Inventors: 若杉庆; 菊池响
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2011-03-01
Filing date: 2012-02-24
Publication date: 2016-04-20
Anticipated expiration: 2032-02-24
Also published as: CN103402476A; WO2012117710A1; JP5832761B2; JP2012179207A

Abstract

A kind of hygroscopicity furnishings, it is designed at least at front waist area, and two sides of liquid absorbing structure all keep close contact with wearer inguinal region, therefore can reliably prevent body fluid lateral leakage.Front waist area side at least in front waist area and back waist region, liquid absorbing structure (17) comprise from crotch area (13) extend to front waist area (11) central area (21) and along laterally from central area (21) outward extending pick up the ears (22), wherein, the rigidity of (22) is picked up the ears lower than the rigidity of central area (21).The first flexible member (28) that a pair Y extends along the longitudinal at least extends to front waist area (11) near the stage casing of crotch area (13), and the non-intersecting segments (28B) that the first flexible member (28) comprises the cross section (28A) crossing with pick up the ears (22) of the liquid absorbing structure (17) in front waist area (11) and do not intersect with the liquid absorbing structure (17) in front crotch area (13).

Description

Hygroscopicity furnishings

Technical field

The present invention relates to a kind of hygroscopicity furnishings being suitable for absorbing bodily refuse, more particularly, relate to a kind of hygroscopicity furnishings being provided with the liquid absorbing structure comprising absorbent cores, such as disposable diaper, incontinence pant etc.

Background technology

The hygroscopicity furnishings being provided with the liquid absorbing structure comprising absorbent cores are widely known by the people.Such as, JPH09-84826A (PTL1) discloses a kind of hygroscopicity furnishings, and it is designed at least in the front waist area in territory, forward and backward lumbar region, and the gauge of liquid absorbing structure reduces gradually towards its local, front end.

Reference listing

Patent documentation

{PTL1}JPH09-84826A

Summary of the invention

In the furnishings that the gauge of liquid absorbing structure reduces gradually towards its local, front end, the rigidity of the liquid absorbing structure near front end should lower than remaining region, therefore, the region near front end can keep and wearer's body close contact, thus can prevent leakage of body fluid.

Certainly, this structure can make the region near the front end of liquid absorbing structure keep and wearer's body close contact.But this liquid absorbing structure cannot keep and wearer's body close contact facing to two sides of wearer inguinal region.May be there is fold due to the motion of wearer thigh and/or fold and be separated with wearer's body in the side of liquid absorbing structure, the probability of leakage of body fluid finally may be caused higher than near front end.Even if the gauge of liquid absorbing structure side reduces gradually and the maintenance of its rigidity is lower thus, these two limits also cannot be obedient to the motion of wearer thigh and be kept and wearer thigh close contact.

According to the present invention, provide a kind of hygroscopicity furnishings, it has longitudinally and perpendicular to described longitudinal transverse direction, described hygroscopicity furnishings comprise:

Towards skin side, not face skin side, front waist area, back waist region, crotch area between described front waist area and described back waist region, and

Liquid absorbing structure, it extends through described crotch area and enters described front waist area and described back waist region, and comprises at least one absorbent cores.

The invention reside in:

Described liquid absorbing structure at least comprises in the described front waist area side of described front waist area and described back waist region and extends to the central area of described front waist area from described crotch area and pick up the ears for outward extending a pair from described central area along described transverse direction, wherein, the rigidity of picking up the ears described in is lower than the rigidity of described central area;

A pair first flexible members are set at least near the stage casing of described crotch area, extend to described front waist area along described longitudinal direction; And

Described first flexible member comprises cross section, at described cross section, each described first flexible member to pick up the ears described in the described liquid absorbing structure in described front waist area in a corresponding overlap, described first flexible member is attached to the basal surface of the described liquid absorbing structure being defined in described not face skin side at described cross section, and described first flexible member is only overlapping with described liquid absorbing structure at described cross section.

Accompanying drawing explanation

Fig. 1 is the perspective view of the first embodiment of disposable diaper, and shown disposable diaper is as an example of hygroscopicity furnishings according to the present invention.

Fig. 2 is the expansion plan view of Fig. 1 diaper.

Fig. 3 is the sectional view of Fig. 1 diaper intercepted along the line III-III of Fig. 2.

Fig. 4 is the expansion plan view of Fig. 1 diaper, the first side flexible member and liquid absorbing structure indicated by the solid line.

Fig. 5 represents that the diaper of Fig. 1 is through the perspective view in wearer's body.

Fig. 6 is the expansion plan view similar with Fig. 4, represents the second embodiment of diaper.

Fig. 7 is the sectional view similar with Fig. 3, represents the 3rd embodiment of diaper.

Detailed description of the invention

< first embodiment >

Fig. 1 and Fig. 2 shows by way of example according to a kind of hygroscopicity furnishings of the present invention.See Fig. 1 and Fig. 2, diaper 10 comprises body 14, and body 14 has longitudinal axis P-P, perpendicular to longitudinal Y of the axis of pitch Q-Q of longitudinal axis P-P, along the longitudinal axis P-P extension and the horizontal X along axis of pitch Q-Q extension.Diaper 10 also comprises towards skin side, not face skin side, front waist area 11, back waist region 12, crotch area 13 between front waist area 11 and back waist region 12.In figure 3, thickness direction, perpendicular to longitudinal Y and horizontal X, is represented by Z.

Body 14 comprises transversely X linearly extended front end 14a and rear end 14b, relative side 14c and 14d be inwardly recessed in crotch area 13, is placed in towards the internal sheet 15 of skin side, the liquid-tight outer plate 16 being placed in not face skin side and the liquid absorbing structure 17 be clipped between internal sheet 15 and outer plate 16.Preferably, intermediate 18 is inserted between internal sheet 15 and liquid absorbing structure 17, internal sheet 15 be provided preferably with a pair retention tab 19 relative to longitudinal axis P-P symmetry towards skin side.

Internal sheet 15 can be made up of various types of transparent liquid fiber matting, all like permeable fiber adhesive-bonded fabrics, porous plastic film or its lamination etc., and the transparent liquid fiber matting of every type preferably has about 15 to about 45g/m ²quantitative in scope.

Outer plate 16 can be made up of various types of known liquid permeability differences or liquid-tight fiber matting, all like spunbond adhesive-bonded fabrics, select sticky adhesive-bonded fabric, SMS (spunbond/molten blow/spunbond) adhesive-bonded fabric, liquid-tight plastic foil etc., or its lamination, the liquid permeability difference of every type or liquid-tight fiber matting preferably have about 10 to about 40g/m ²quantitative in scope.

Intermediate 18 can be made up, such as, quantitatively about 15 to about 45g/m of various types of known ventilative and transparent liquid fiber matting ²air-thru nonwoven fabric in scope.Intermediate 18 improves damping characteristics, excessively disperses with limit body fluid.In addition, intermediate 18 keeps internal sheet 15 to leave liquid absorbing structure 17, contributes to thus preventing body fluid from surprisingly flowing back into internal sheet 15.It should be noted that diaper 10 might not be provided with intermediate 18.

Retention tab 19 can be made up of hydrophobic fibre adhesive-bonded fabric, moisture-inhibiting gas but liquid-tight plastic foil or its lamination.When hope is by adhesive-bonded fabric structure retention tab 19, quantitatively about 10 to about 30g/m ²sMS fiber matting in scope, spun-bonded fibre adhesive-bonded fabric etc. may be used for retention tab 19.

Liquid absorbing structure 17 is preferably flat structure, and its profile is limited by front end 17a, rear end 17b, relative side 17c and 17d, and its width transversely becomes large from the subregion closer to front waist area 11 of crotch area 13 gradually towards front waist area 11.More particularly, liquid absorbing structure 17 has central area 21 and picks up the ears 22.Central area 21 extends to front waist area 11 from back waist region 12 through crotch area 13 along the longitudinal.Pick up the ears 22 to be limited to the both sides of central area 21 at front waist area 11 along horizontal X.In figs. 3 and 4, central area 21 and the demarcation line 24 of picking up the ears accordingly between 22 are represented by dashed line.The front end 17a of liquid absorbing structure 17 preferably has relative curved corner.

Liquid absorbing structure 17 preferably includes absorbent cores and liquid dispersion sheet.Absorbent cores obtains by moist for superabsorbent polymer beads (SAP), cotton-shaped wood pulp cellulose and the mixture as available extra thermoplastic synthetic fibers (short fiber) being molded as reservation shape.Liquid dispersion sheet is made up of such as transparent liquid fiber matting sheet, is suitable for covering absorbent cores, and object improves shape retention and the liquid distribution capacity of absorbent cores.Liquid absorbing structure 17 can make its basal surface be coated with the egative film 27 be made up of liquid-tight plastic foil or liquid-tight fiber matting.Liquid absorbing structure 17 to construct, as long as can reach the beneficial effect of present embodiment by absorbent cores separately.In this case, preferably, absorbent cores should be configured to keep its shape better.Absorbent cores can be molded by suitably extruding under such as heating state or when material wets.When by hot extrusion, preferably, absorbent cores should containing appropriate thermoplastic fiber.

See Fig. 3, liquid absorbing structure 17 quantitatively preferably consistent, in the front waist area 11 of liquid absorbing structure 17 pick up the ears 22 gauge reduce gradually from its respective most inner side towards respective outer end respectively.As a result, respectively pick up the ears 22 define downward-sloping shape towards skin side, and pick up the ears 22 rigidity be less than the rigidity of central area 21.More particularly, when liquid absorbing structure 17 has absorbed specified rate synthetic urine, the average thickness size H1 of central area 21 is preferably in about 12 scopes to about 15mm, and the average thickness size H2 of roughly middle part that what transversely X saw respectively pick up the ears is preferably in about 8 scopes to about 11mm.

< is for measuring the method > of the gauge of liquid absorbing structure

First, the whole diaper 10 comprising liquid absorbing structure 17 is equipped with the container of artificial urine from the immersion of internal sheet 15 side.Liquid absorbing structure 17 is such as by being quantitatively about 300g/m ²the moist polymer beads of superabsorbent and be quantitatively about 315g/m ²the mixture of cotton-shaped wood pulp cellulose make.Synthetic urine is 200g carbamide, 80g sodium chloride, 80g magnesium sulfate, 8g calcium chloride and 1g pigment (indigo plant) aqueous solution in 10 liters of ion exchange waters.After diaper 10 being placed in lower 5 minutes of this condition, taking out diaper 10 from container and make to flatten upward on a desk towards skin side.After diaper 10 being placed in lower 5 minutes of this condition, respectively for central area 21 with pick up the ears 22 to carry out thickness measure.For the gauge H1 of central area 21, measured value obtains near the central point of the central area 21 of Y and horizontal X restriction along the longitudinal, is then averaged these measured values and determines this gauge H1.For picking up the ears 22, drawing the diagonal of more than two along its shape, then, obtaining measured value at diagonal near intersections.

Alternatively, can by the absorbent cores of picking up the ears in 22 to be quantitatively set as lower than the absorbent cores in central area 21 quantitative, therefore, when gauge H1, H2 are substantially equal, pick up the ears 22 rigidity value can be set as that rigidity value lower than central area 21 is to form these regions 21,22.In this case, form-deprivation and/or crackle should be unable to be there is in an absorbent core due to gauge difference.

Also have one may be, when liquid absorbing structure 17 entirety has unanimously quantitative, only can form central area 21 by multiple stamped recess by given patterned arrangement, thus by pick up the ears 22 rigidity value be set as lower than central area 21 rigidity value.In any case, preferably liquid absorbing structure 17 is configured to pick up the ears 22 can have rigidity lower than central area 21 rigidity.In order to ensure the differentiation rigidity of hope, the means of the component that known component and/or known process for this types of articles can be used generally to use, as long as can realize beneficial effect of the present invention described below.

Further, can also form groove along the demarcation line 24 of picking up the ears accordingly between 22 and central area 21, these grooves along the longitudinal Y extend.In this case, the function of each groove is as hinge, is convenient to relative picking up the ears and 22 bends, thus with wearer's body close contact towards wearer's body under the tensile stress effect of the first flexible member 28.

Be interposed in the wire between liquid absorbing structure 17 and egative film 27, thread or rope form first flexible member 28 puts in liquid absorbing structure 17 picks up the ears in 22.Specifically, the first flexible member 28 is kept the basal surface of contact liq absorbing structure 17, and extends along the central area 21 of liquid absorbing structure 17.

See Fig. 4, the first flexible member 28 extends to front waist area 11 from the subregion closer to back waist region 12 of crotch area 13, and comprises cross section 28A and non-intersecting segments 28B.Cross section 28A and corresponding 22 crossing (overlaps) of picking up the ears in the not face skin side of liquid absorbing structure 17.Non-intersecting segments 28B extends through crotch area 13, sees along horizontal X, is placed in the outside of the central area 21 of liquid absorbing structure 17.Correspondingly, the first flexible member 28 and absorbing structure 17 22 places of picking up the ears only corresponding are overlapping.First flexible member 28 can be elastomeric material, all like elastic yarns, and its fineness, in the scope of about 320 to about 1240 dtexs (dtex), preferably arrives in the scopes of about 940dtex about 620; Its draw ratio is in the scope of about 1.5 to about 2.5.According to factors such as the sizes of cross section 28A, the first flexible member 28 at least can extend to front waist area 11, as long as can realize beneficial effect of the present invention is described below near the stage casing of crotch area 13, i.e. near the axis of pitch Q-Q of crotch area 13.

Although illustrate that to be a single flexible member 28 with each pick up the ears is 22 crossing, also can arrange plural first flexible member 28 corresponding to each pick up the ears 22 to intersect.When the first flexible member 28 be arranged as make plural first flexible member 28 with corresponding pick up the ears 22 crossing time, the elastomeric material being placed in corresponding first flexible member 28 of picking up the ears inside 22 is seen along horizontal X, preferably, its tension is lower than the tension of elastomeric material being placed in this corresponding first flexible member 28 of picking up the ears outside 22.This is because, if transversely X sees that being placed in corresponding elastomeric material of picking up the ears outside 22 has comparatively high tensile stress, so, corresponding outside subregion of picking up the ears will due to corresponding pick up the ears 22 shape and contact wearer's body more tightly, and internal zone dividing can be separated with wearer's body on the contrary, cause leakage of body fluid.

Egative film 27 can by moisture-inhibiting gas but liquid-tight plastic foil, liquid-tight SMS (spunbond/molten blow/spunbond) fiber matting, spun-bonded fibre adhesive-bonded fabric or its lamination make, often kind of material, such as, it is quantitatively about 10 to about 30g/m ²scope in.

Again see Fig. 2, body 14 preferably includes front end fin 30 and rear end fin 31 and a pair flank sheet 32.The outside of front end fin 30 and rear end fin 31 front and back ends 17a, 17b of liquid absorbing structure 17 on longitudinal Y extends along horizontal X, the outside Y extension along the longitudinal of flank sheet 32 relative side 17c, 17d of liquid absorbing structure 17 on horizontal X.Flank sheet 32 coordinates with the second flexible member 42 described below and has cushion function.Retention tab 19, internal sheet 15, egative film 27 and outer plate 16 that front and back ends fin 30,31 is also stacked mutually by Y-direction extension exceedes liquid absorbing structure 17 along the longitudinal respectively front and back ends 17a, 17b limit.Internal sheet 15, retention tab 19, egative film 27 and outer plate 16 that flank sheet 32 also can be stacked mutually by relative side 17c, the 17d extending outwardly beyond liquid absorbing structure 17 along horizontal X respectively limit.

In each rear side fin 33 all limited by the overlay region of rear end fin 31 and flank sheet 32, the corresponding stiff end 35a of paired tape fastener joint 35 can be interposed between the relative side of retention tab 19 and outer plate 16, and is fixed on therebetween with the hot-melt adhesive (not shown) putting on these sheet 16,19 inner surfacies.The side of free end 35b along horizontal X from rear side fin 33 (i.e. the side of back waist region 12) of each tape fastener joint 35 stretches out, and it can be provided with the first tightening member 36 comprising multiple hook.When diaper 10 is through in wearer's body, the first tightening member 36 releasably engages, so define waist opening 38 and pair of leg opening 39 (see Fig. 1) with the second tightening member 37.Second tightening member 37 extends on the outer surface of front waist area 11 along horizontal X, preferably includes multiple circle.Second tightening member 37 can be arranged to the same form of belt, and its width dimensions is greater than the width dimensions of the first tightening member 35, and extends through the front end of liquid absorbing structure 17.

Between the internal sheet 15 all defining a part of rear end fin 31 and egative film 27, preferably accompany elastic waist belt 41.Belt 41 can be such as made up of the plastic material with buffering effect, such as has the flexible polyurethane foam of the hole of connection.Between the outer plate 16 all defining part flank sheet 32 and retention tab 19, preferably, plural wire, thread or rope form second flexible member 42 are fixed in the contractile mode of Y along the longitudinal and are used hot-melt adhesive (not shown) to bond in a tensioned state.

Preferably, these retention tabs 19 are arranged to respectively, have near side (ns) 44, forward and backward stiff end 45,46 and distal edge 47.Near side (ns) 44 forming section flank sheet 32, forward and backward stiff end 45,46 with hot-melt adhesive (not shown) be fixed to internal sheet 15 towards skin side and outer plate 16 along horizontal X extend outwardly beyond internal sheet 15 and extension in territory, forward and backward lumbar region 11,12 towards skin side, distal edge 47 along the longitudinal Y extends and by making the inner side edge of corresponding retention tab 19 inwardly overturn formation between forward and backward stiff end 45,46.Distal edge 47 is provided preferably with the flexible member 48 of the line of fixed thereon of the collapsible mode of Y along the longitudinal, silk or rope form.When diaper 10 is through in wearer's body, under flexible member 48 contraction, distal edge 47 upwards with being separated towards skin side of internal sheet 15, form the Drain Resistance flange being suitable for for a pair helping prevent bodily waste to leak from the side.

See Fig. 4, liquid absorbing structure 17 and the first flexible member 28 indicated by the solid line, and miscellaneous part is represented by dashed line.

In the diagram, in front waist area 11, what the cross section 28A of the first flexible member 28 put in liquid absorbing structure 17 in the not face skin side of liquid absorbing structure 17 picks up the ears 22, result, and the picking up the ears of liquid absorbing structure 17 22 is directly under the tension of the first flexible member 28.Liquid absorbing structure 17 pick up the ears in 22, reduce gradually from inner side to thickness as outside along horizontal X, as known finding in Fig. 3.So, the rigidity value of 22 rigidity values had lower than central area 21 of picking up the ears.Utilize structure described above here, diaper 10 according to the present invention provides beneficial effect described below.

As clearly shown in Figure 5, liquid absorbing structure 17 pick up the ears 22 respectively define region towards wearer inguinal region.When diaper is through in wearer's body, these regions may become fold and/or fold and be separated with wearer's body along with the motion of wearer inguinal region.When not taking any effective measures, leakage of body fluid may be caused in these regions.According to this embodiment, the picking up the ears of liquid absorbing structure 17 22 is configured to along laterally having a down dip from inner side to lateral, and correspondingly, its gauge reduces in the direction gradually.As a result, these pick up the ears 22 rigidity low to being enough to smoothly bend along wearer's body profile.In addition, the cross section 28A of the first flexible member 28 puts in these and picks up the ears 22, make these pick up the ears 22 under action of pulling stress close contact wearer's body, contribute to thus preventing body fluid from leaking from the side.

In the first flexible member 28, the cross section 28A overlapping with liquid absorbing structure 17 in fact its tension is restricted under the effect of the rigidity effect of liquid absorbing structure 17.But, when diaper 10 is through in wearer's body, not overlapping with the liquid absorbing structure 17 non-intersecting segments 28B of the first flexible member 28 extends with bending attitude in crotch area 13, and its action of pulling stress at cross section 28A, and makes 22 close contact wearer's body of picking up the ears.Although the picking up the ears of liquid absorbing structure 17 22 comprises not overlapping with the cross section 28A of the first flexible member 28 region respectively, pick up the ears can partly keep and wearer's body close contact, ensure to pick up the ears to prevent from being as a whole separated with wearer's body.In this manner, can prevent body fluid from leaking from the side.

This embodiment of the present invention not only can be applied to disposable wearing article, also can be applied to pant-type disposable diaper.Should note, absorbing structure 17 described above and the first flexible member 28 can take the form of isolating with other architectural features of above-mentioned diaper, and can use together with other various diapers or absorbent device, this point those skilled in the art are easy understand.The present invention is not limited to above-mentioned diaper.In opening diaper, pick up the ears 22 not overlapping with the cross section 28A of the first flexible member 28 region, in other words, be limited to the region (i.e. front end) above the 28A of intersection region, be preferably provided with the second tightening member 37 of degree of tightness band shape on its outer surface.Second tightening member 37 can engage with the first tightening member 36 of tape fastener joint 35, is pressed in upper end in wearer's body, thus upper area close contact wearer's body.In this way, upper area should not be separated with wearer's body, ensure that and picks up the ears 22 to fit in wearer's body as a whole.

See Fig. 4, the second flexible member 42 along the longitudinal Y is parallel to the first flexible member 28 and extends, and can think, its tension part contribute to liquid absorbing structure 17 pick up the ears 22 there is downward-sloping shape respectively.In other words, can think, the first flexible member 28, second tightening member 37 coordinates maintenance to pick up the ears 22 close contact wearer's body as a whole together with the second flexible member 42.

In order to realize these effects, each first flexible member 28 preferably, in the elastic region of the under tension effect of this flexible member 28 when being extended to 93% (the maximum extension based on 100%), there is the tensile stress value in about 0.2 scope to about 0.8N.This is because, if tensile stress value is less than 0.2N, so, pick up the ears 22 by what be more difficult to fold liquid absorbing structure 17 along wearer's body profile; And if tensile stress value is greater than 0.8N, so, pick up the ears 22 Liquid Absorption character can be subject to the restriction of so high tensile stress, body fluid may absorb insufficient and finally to leak from the side.

< is for measuring the method > of the tension of the first flexible member 28

In order to measure the tension of the first flexible member 28, employ measuring stress instrument (AUTOGRAPHAGS-1kWG that ShimadzuCorporation produces).Test is that the initial gap distance between upper and lower chuck is 250mm, extensibility is carried out under being the condition of 100mm/min.Specifically, the Hookean region of given width dimensions is taken off (more particularly from diaper (this test block does not comprise liquid absorbing structure), it is the Hookean region being provided with the first flexible member 28, comprise two side edges transversely outside the first flexible member 28, each side is along the width with about 5mm.When the first flexible member 28 be made up of many elasticas time, situation is identical), and in a contracted state this Hookean region to be fixed between two chucks.The tension of this Hookean region is measured in the moment being extended to 93%.

Such as, assuming that the disposable diaper for baby of standard M size is selected as the object of this embodiment of the present invention, the size L1 of liquid absorbing structure 17 on longitudinal Y (size of space between front end 17a and rear end 17b on longitudinal Y) is that about 320mm is to about 360mm, at central area 21 relative side 17c, size W1 between 17d on horizontal X is the scope of about 80mm to about 100mm, two pick up the ears 22 relative side 17c, size of space W2 between 17d on horizontal X is the scope of about 90mm to about 120mm, the 22 size L2 on longitudinal Y that pick up the ears of liquid absorbing structure 17 are the scope of about 100mm to about 160mm, in front waist area 11, two 22 size W3 on horizontal X that pick up the ears are the scope of about 15mm to about 40mm.

The first size L3 of flexible member 28 on longitudinal Y is the scope of about 210mm to about 230mm, the size L4 of cross section 28A on longitudinal Y of the first flexible member 28 is the scope of about 30mm to 50mm, and the size L5 of non-intersecting segments 28B on longitudinal Y is the scope of about 160mm to about 200mm.Size of space W4 between the non-intersecting segments 28B of relative side 17c, 17d and the first flexible member 28 on horizontal X is the scope of about 3mm to about 20mm.

In the first flexible member 28, the size L4 of cross section 28A on longitudinal Y is the scope of about 5% to about 25% of the size L5 of non-intersecting segments 28B on longitudinal Y, preferably, is the scope of about 8% to 20%.This is because, if the size L4 of cross section 28A exceedes the size L5 of non-intersecting segments 28B, by be difficult to along wearer's body profile curves liquid absorbing structure 17 pick up the ears 22, pick up the ears 22 to separate from wearer's body, cause the lateral leakage of bodily waste.If size L4 is less than 5% of non-intersecting segments 28B, the tension then acted on cross section 28A will in concentration of local, its effect is that compressing liquid absorbing structure exceedes essential limit, and liquid absorbing structure 17 part may be caused like this to ftracture, and its fluid absorbent is deteriorated.

The size L4 of cross section 28A on longitudinal Y of the first flexible member 28 preferably picks up the ears about 15% to about 36% of 22 size L2 on longitudinal Y.This is because if size L4 is less than 15%, then the first flexible member 28 acts on whole tension of picking up the ears on 22 and can, at local place, more be difficult to pick up the ears 22 along wearer's body profile curves; If size L4 is greater than 36%, then cross section 28A by the far-end covering pick up the ears 22 or cross section 28A completely by be positioned at pick up the ears 22 upper position, wherein, cross section 28A may bending or bending pick up the ears 22, and its effect pulls down picking up the ears.If the first flexible member 28 forward (upwards) extend beyond and pick up the ears 22 and crossing with the second tightening member 37 being attached to outer surface, so, it is the power pulling down the second tightening member 37 that second tightening member 37 may be subject to acting on, and therefore whole diaper 10 can glide.

See Fig. 4, pick up the ears 22 each following 49 circular shapes preferably with indent, so, when pick up the ears 22 be placed in the inguinal region of close contact wearer time, pick up the ears 22 can smoothly to bend along the profile of inguinal region further.Specifically, following 49 can bend with angle [alpha], and angle [alpha] is the angle of following 49 and demarcation line 24, are preferably about the scope of 45 ° to about 60 °.This is because, if angle [alpha] is less than 45 °, so, pick up the ears 22 lower end can undue point, more difficultly will pick up the ears 22 along wearer's body is bending; If angle [alpha] is greater than 60 °, so, pick up the ears 22 lower end can become wider, the tension of the cross section 28A of the first flexible member 28 may be not enough to act on lower end and keep lower end close contact wearer's body.In various situation, the leakage part of body fluid may occur.

Again see Fig. 3, although according to the present embodiment liquid absorbing structure 17 to pick up the ears 22 be flat in not face skin side, shape towards skin side is outwards downward-sloping gradually in the horizontal, but, be can be formed on horizontal X downward-sloping towards skin side and not face skin side towards diaper center.What outwards reduce gradually on horizontal X at gauge picks up the ears in 22, advantageously, can by reliably keeping and wearer's body close contact further outside it, can help prevent thus and pick up the ears 22 to separate from wearer's body.In addition, step can also be formed near central area 21 and each demarcation line 24 of picking up the ears between 22, instead of adjustment pick up the ears 22 gauge H2 make it reduce gradually and limit the shape under being tilted to thus, as long as pick up the ears 22 gauge H2 be less than the gauge of central area 21.

< is for the formation of the method > of the absorbent cores of liquid absorbing structure 17

Will be described below now the method forming the absorbent cores of liquid absorbing structure 17 in the process manufacturing diaper 10.

A kind of equipment (not shown) comprises the hopper for supplying absorbent.Such as the dispersed material such as wood pulp cellulose and super-absorbent polymer particles is fed into rotation suction drum, and this suction drum is provided with a series of recessed mould along its periphery surface and is used for deposition materials.Material is fed in mould, for the formation of absorbent cores from hopper.The lower surface mesh of each mould is formed, and material can be sucked in mould through these meshes and be deposited on wherein.

In each mould of suction drum, first recessed area extends along the direction of rotation of suction drum, corresponding to the central area 21 of absorbent cores, some second recessed areas along the transverse direction being orthogonal to direction of rotation each since first recessed area extend such as about 15mm (correspond to respectively pick up the ears 22 width dimensions W3).Absorbent, namely from the dispersed material of hopper supply, be easy to by the central area concentrating on each recessed area, therefore, the quantity of material be deposited in the second recessed area may be less than the quantity of material be deposited in the first recessed area.So, 22 be quantitatively set to and be less than the quantitative of central area 21 of can picking up the ears.In order to make to pick up the ears 22 quantitatively can reliably be less than the quantitative of central area 21, other factors such as the aperture area of the opening that the degree of depth of the second recessed area deposition or/and such as bottom can also be formed and mesh size are set to the correspondingly-sized being less than the first recessed area.

See Fig. 3, in crotch area 13, size of space W5 between the inward flange 44a of the near side (ns) 44 of retention tab 19 on horizontal X preferably about 120mm, to the scope of about 140mm, sees along horizontal X, and near side (ns) 44a is positioned at the outside of the cross section 28A of the first flexible member 28.If see that near side (ns) 44a is positioned at the inner side of the first flexible member 28 along horizontal X, then when liquid absorbing structure 17 pick up the ears 22 under the contraction of the first flexible member 28, bend towards wearer's body time near side (ns) 44a may by bending or bending, and the distal edge 47 of retention tab 19 under the action of pulling stress of flexible member 48 from internal sheet 15 upwards separately before, can be placed in and contact with wearer's body.Therefore, may be difficult to make retention tab 19 help prevent the lateral leakage of bodily waste fully.

Comparatively speaking, according to this embodiment, see that near side (ns) 44a is preferably located in the outside of the first flexible member 28 along horizontal X, therefore, even if the picking up the ears of liquid absorbing structure 17 22 bends towards wearer's body under the action of pulling stress of the first flexible member 28, near side (ns) 44a also should not reel, and retention tab 19 can raise under the contraction of flexible member 48.In this manner, retention tab 19 can give full play to the function keeping bodily waste.

< second embodiment >

Fig. 6 is the plan view of similar Fig. 4, shows the disposable diaper according to second embodiment of the invention.The basic structure of diaper 10 is according to the present embodiment similar to the first embodiment, therefore describes this embodiment given below by for the distinguishing characteristics different from the first embodiment.

See Fig. 6, the front area 50 comprised in front waist area 11 according to the liquid absorbing structure 17 of this embodiment, the Background Region 51 in back waist region 12 and the narrower zone line 52 that extends of Y along the longitudinal between front area 50 and Background Region 51.Front area 50 and the width dimensions both Background Region 51 are all greater than the width dimensions of zone line 52, and all comprise and pick up the ears 22 from central area 21 along horizontal X is outward extending.

Although do not illustrate, picking up the ears in front area 50 and Background Region 51 22 preferably has the gauge reduced gradually from Inside To Outside respectively, to limit from Inside To Outside along the downward-sloping shape of horizontal X.But, should be understood that present embodiment pick up the ears 22 can according to above for first embodiment describe pick up the ears 22 arbitrary structures construct.First flexible member 28 extends through crotch area 13 and enters front waist area 11 and back waist region 12, and with respectively pick up the ears 22 part crossing.More particularly, the first flexible member 28 be included in the front area 50 of liquid absorbing structure 17 and Background Region 51 with the 22 crossing cross section 28A and the non-intersecting segments 28B that do not intersect with liquid absorbing structure 17 in crotch area 13 that pick up the ears.By formed have similar first embodiment pick up the ears 22 front area 50 and Background Region 51, picking up the ears of liquid absorbing structure 17 22 can along the profile curves of wearer's body, be not only at front waist area 11, and be in back waist region 12, thus, the lateral leakage of bodily waste effectively can be prevented at front waist area 11 and back waist region 12.

< the 3rd embodiment >

Shown in Fig. 7 is disposable diaper 10 according to third embodiment of the invention.The basic structure of diaper 10 is according to the present embodiment similar to the first embodiment or the second embodiment, therefore describes this embodiment given below by for the distinguishing characteristics different with the second embodiment from the first embodiment.

See Fig. 7, in disposable diaper 10 according to the present embodiment, the sheet forming internal sheet 15 has multiple ridges 55 that Y along the longitudinal extends in skin side at it and the multiple grooves 56 replaced with ridge 55.This sheet preferably includes fiber matting.Form the fiber of internal sheet 15 preferably along all directions (comprising three-dimensional) random orientation, this shape can when remaining the form of continuous fiber net when internal sheet 15, utilize the series of spray nozzles array being located at online side, obtained by the gas spray technology of internal sheet 15.Water spray technology, steam injection process or hot-air spray technology can use in equivalence.So the density of ridge 55 is higher than the density of groove 56.Here it should be noted that, ridge 55 and groove 56 can utilize gear process alternately to be formed.According to this technique, the density of ridge 55 is lower than the density of groove 56.

Like this, internal sheet 15 is alternately formed with the high density area (ridge) 55 of Y extension along the longitudinal and the low density area (groove) 56 of Y extension along the longitudinal, and the stiffness difference caused due to density variation between the two between its median ridge 55 and groove 56 impels internal sheet 15 to bend along horizontal X.Specifically, in response to liquid absorbing structure 17 pick up the ears 22 bending, internal sheet 15 also smoothly bends, and thus, further improves being applicable to of 22 pairs of wearer's body of picking up the ears.

That the internal sheet in present embodiment preferably has is quantitatively about 20g/m ²or larger, be more preferably about 25g/m ²or larger, and the gauge preferably had is about 0.5mm or larger, is more preferably about 0.8mm or larger.If what internal sheet 15 had is quantitatively less than 20g/m ²and the gauge had is less than 0.5mm, so, internal sheet 15 may be helpless to the suitable bending shape of 22 maintenance of picking up the ears, and even when internal sheet is formed with ridge 55 and groove 56, internal sheet is also limited by meaning to this contribution.

Although do not illustrate, but each groove can be formed with the high density area and low density area that replace along horizontal X, namely the dependency of the rigidity value of ridge 55 and groove 56 can be set as: ridge 55 is higher than the high density area of groove 56, the high density area of groove 56 higher than the low density area of groove 56, to guarantee that internal sheet 15 can easily along the profile curves of wearer's body.Although in the present embodiment, ridge 55 and groove 56 are parallel to longitudinal axis P-P and extend, and can be formed obliquely these ridges 55 and groove 56 relative to longitudinal axis P-P, with the 22 bending directions of picking up the ears of rearrange liquids absorbing structure 17.

The composition component of diaper 10 be not limited to describe in this description those, but other various types of materials widely used can unrestrictedly use in correlative technology field.Embodiment be also not limited to describe in description with accompanying drawing in represent those, such as, the technical characteristic described in each claim (except claim 1) can be appropriately combined to obtain various effective embodiment.

Some aspects of the present invention can be arranged according to every below at least:

(i) a kind of hygroscopicity furnishings, have longitudinal direction and be orthogonal to longitudinal transverse direction, it comprises:

Towards skin side, not face skin side, front waist area, back waist region, crotch area between front waist area and back waist region, and

Liquid absorbing structure, it extends through crotch area and enters front waist area and back waist region, and comprises at least one absorbent cores, wherein:

The front waist area side of liquid absorbing structure at least in front waist area and back waist region comprise from crotch area extend to front waist area central area and along laterally picking up the ears for outward extending a pair from central area, wherein, the rigidity of picking up the ears is lower than the rigidity of central area;

A pair first flexible members are set at least near the stage casing of crotch area, extend to front waist area along the longitudinal; And

First flexible member comprises cross section, cross section first flexible member all to the corresponding overlap in the picking up the ears of the liquid absorbing structure in front waist area, first flexible member is attached to the basal surface of the liquid absorbing structure being limited to not face skin side at cross section, and the first flexible member is only overlapping with liquid absorbing structure at cross section.

The aspect described in (i) item above can provide below useful effectively in more than one:

A () is at least at front waist area, the rigidity of picking up the ears to have of liquid absorbing structure is lower than the rigidity of central area, the first flexible member extended along the longitudinal is crossing with part of picking up the ears, and making to pick up the ears can close contact along the profile curves of wearer inguinal region and between both maintenances.So, bodily waste can be prevented near these are picked up the ears to the generation of outward leakage.

The aspect described in (i) item above can comprise the embodiment at least, and these embodiments can adopt or adopt be combineding with each other individually:

(ii) size that the cross section of each the first flexible member has in the vertical corresponds to the scope of about 5% to about 25% of the size of non-intersecting segments, and non-intersecting segments is not overlapping with a liquid absorbing structure part along the longitudinal for the first flexible member.

(iii) liquid absorbing structure has quantitatively uniform.

(iv) gauge of picking up the ears to have of liquid absorbing structure outwards reduces in the horizontal gradually.

(v) liquid absorbing structure to pick up the ears in not face skin side be flat, and make towards the outwards downward-sloping in the horizontal shape of skin side.

(vi) liquid absorbing structure pick up the ears have inclined surface form towards skin side and not face skin side.

(vii) in liquid absorbing structure, quantitative lower than the absorbent cores in central area of the absorbent cores in picking up the ears quantitative.

(viii) along the groove of the demarcation line formation compacting of respectively picking up the ears and between central area.

(ix) liquid absorbing structure comprises the zone line that the front area being limited to front waist area side, the Background Region being limited to back waist region side and width are less than the width of front area and Background Region, wherein, pick up the ears to be formed in front area and Background Region, wherein, the cross section of the first flexible member is arranged in front area and Background Region, in cross part office, respectively picking up the ears of the first flexible member and the liquid absorbing structure in front area and Background Region is overlapping.

X () liquid absorbing structure is clipped between the transparent liquid internal sheet towards skin side and the liquid-tight outer plate in not face skin side, and internal sheet is formed with towards skin side multiple ridge of extending along the longitudinal at it and mutually replaces with multiple ridge and the multiple grooves extended with being parallel to multiple ridge.

(xi) internal sheet is along being laterally alternately formed with high density area and low density area, and high density area and low density area extend along the longitudinal.

(xii) other flexible member one or more is set, these other flexible member is parallel to the first flexible member and extends and transversely outwards separate with the first flexible member, these other flexible member comprises cross section, in cross part office, these other flexible member at least in front waist area side transversely outwards to the position that the cross section of the first flexible member separates all with liquid absorbing structure pick up the ears corresponding one overlapping, these other flexible member is attached to the basal surface of liquid absorbing structure at cross section, these other flexible member is only overlapping with liquid absorbing structure at cross section.

(xiii) see the flank sheet outside the relative side extending to liquid absorbing structure in the horizontal, be provided with and be attached on it to be parallel to the first flexible member extension also outwards separates intended size in the horizontal the second flexible member with the first flexible member with contractile state.

(xiv) hygroscopicity furnishings comprise the clamp device being suitable for the relatively routine limit of front waist area being fastened to the relative side of back waist region, wherein, clamp device at least comprises tightening member, this tightening member is along laterally extending on the outer surface of front waist area, make tightening member can extend across the front end of liquid absorbing structure, the first flexible member is arranged to not crossing with tightening member.

(xv) circular shape below with indent of picking up the ears.

Embodiment according to above in (ii) to (xv), the one or several beneficial effects proposed are ensured well.

This application claims the rights and interests of No. 2011-043537th, Japanese publication, the full content of this application is contained in this by reference.

Claims

1. hygroscopicity furnishings, have longitudinal direction and be orthogonal to longitudinal transverse direction, it comprises:

Liquid absorbing structure, it extends through crotch area and enters front waist area and back waist region, and comprises at least one absorbent cores,

Wherein:

Front waist area side at least in front waist area and back waist region, liquid absorbing structure comprise from crotch area extend to front waist area central area and along laterally picking up the ears for outward extending a pair from central area, wherein, described gauge of picking up the ears for a pair diminishes in the shape tilted from described horizontal Inside To Outside gradually, the rigidity of picking up the ears thus, lower than the rigidity of central area, is describedly picked up the ears for a pair and demarcation line between described central area is formed with the groove along described longitudinal extension;

A pair first flexible members, itself and described central area adjoin and at least near the stage casing of crotch area, extend to front waist area along the longitudinal, and abut against with the bottom surface of the described liquid absorbing structure being positioned at described not face skin side; And

First flexible member comprises cross section and non-intersecting segments, in cross part office, a corresponding overlap during what the first flexible member was all low to the rigidity of the liquid absorbing structure in front waist area pick up the ears, non-intersecting segments is not intersected at described crotch area and described liquid absorbing structure

Upper intersection of picking up the ears described in each has multiple described first flexible member,

In multiple described first flexible member, be positioned at the tension of described first flexible member of inner side in the cross direction lower than the tension of described first flexible member being positioned at outside in the cross direction.

2. hygroscopicity furnishings as claimed in claim 1, wherein, the size that the cross section of each the first flexible member has in the vertical corresponds to the scope of 5% to 25% of the size of non-intersecting segments, and non-intersecting segments is not overlapping with a liquid absorbing structure part along the longitudinal for the first flexible member.

3. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, liquid absorbing structure has quantitatively uniform.

4. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, the gauge of picking up the ears to have of liquid absorbing structure outwards reduces in the horizontal gradually.

5. hygroscopicity furnishings as claimed in claim 4, wherein, the picking up the ears of liquid absorbing structure have inclined surface form towards skin side and not face skin side.

6. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, in liquid absorbing structure, quantitative lower than the absorbent cores in central area of the absorbent cores in picking up the ears quantitative.

7. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, along the groove of the demarcation line formation compacting of respectively picking up the ears and between central area.

8. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, liquid absorbing structure comprises the zone line that the front area being limited to front waist area side, the Background Region being limited to back waist region side and width are less than the width of front area and Background Region, wherein, pick up the ears to be formed in front area and Background Region, wherein, the cross section of the first flexible member is arranged in front area and Background Region, in cross part office, the corresponding overlap of picking up the ears of the first flexible member and the liquid absorbing structure in front area and Background Region.

9. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, liquid absorbing structure is clipped between the transparent liquid internal sheet towards skin side and the liquid-tight outer plate in not face skin side, and internal sheet is formed with towards skin side multiple ridge of extending along the longitudinal at it and replaces with ridge and be parallel to multiple grooves that ridge extends.

10. hygroscopicity furnishings as claimed in claim 9, wherein, internal sheet is along being laterally alternately formed with high density area and low density area, and high density area and low density area extend along the longitudinal.

11. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, other flexible member one or more is set, other flexible member described is parallel to the first flexible member and extends and transversely outwards separate with the first flexible member, other flexible member described comprises cross section, in this cross part office, described other flexible member at least in side, front waist region transversely outwards to the position that the cross section of the first flexible member separates all with liquid absorbing structure pick up the ears corresponding one overlapping, other flexible member described is attached to the basal surface of liquid absorbing structure in cross section, other flexible member described is only overlapping with liquid absorbing structure at cross section.

12. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, the flank sheet seeing outside the relative side extending to liquid absorbing structure is in the horizontal provided with to be attached on it with contractile state and extends and the second flexible member outwards separating intended size in the horizontal with the first flexible member to be parallel to the first flexible member.

13. hygroscopicity furnishings as claimed in claim 1 or 2, comprise the clamp device being suitable for the relative side relative side of front waist area being fastened to back waist region, wherein, clamp device at least comprises tightening member, this tightening member is along laterally extending on the outer surface of front waist area, make tightening member can extend through the front end of liquid absorbing structure, the first flexible member is arranged to not crossing with tightening member.

14. hygroscopicity furnishings as claimed in claim 1 or 2, wherein, the circular shape below with indent of picking up the ears.