CN103987352A - Disposable diaper - Google Patents

Disposable diaper Download PDF

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Publication number
CN103987352A
CN103987352A CN201280060684.3A CN201280060684A CN103987352A CN 103987352 A CN103987352 A CN 103987352A CN 201280060684 A CN201280060684 A CN 201280060684A CN 103987352 A CN103987352 A CN 103987352A
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CN
China
Prior art keywords
pars contractilis
length direction
mentioned
absorber
elastomeric element
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Granted
Application number
CN201280060684.3A
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Chinese (zh)
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CN103987352B (en
Inventor
竹村政典
佐藤信也
柳原茂人
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Kao Corp
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Kao Corp
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Publication of CN103987352B publication Critical patent/CN103987352B/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49011—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

A stretchable section (8) configured to include a plurality of elastic members (81) of identical fineness (a fineness of 450 dtex or less) arranged in an elongated state between a topsheet (2) and a backsheet (3) forms on a dorsal section (A) a lower stretchable section (8A1) in an absorber arrangement region (A1) and an upper stretchable section (8A2) in an absorber non-arrangement region (A2). The elastic members (81) of the lower stretchable section (8A1) have a non-stretchable section (82) at a portion overlapping with an absorber (4). The upper stretchable section (8A2) has a lesser stretching force than that of the lower stretchable section (8A1). Upper and lower ends (60p, 60q) of a tape base (60) are positioned in the vicinity of respectively corresponding outermost or innermost first imaginary straight lines (V1p, V1q). A major part of the tape base (60) is present in a region sandwiched by the two imaginary straight lines (V1p, V1q). A major part of a tape holding section (61) is present in a region sandwiched by two second imaginary straight lines (V2) and (V2).

Description

Disposable diaper
Technical field
The present invention relates to disposable diaper.
Background technology
At present, the disposable diaper of known so-called deploying type, it has main body, this main body comprises positive dough sheet, back sheet and is present in two absorbers between sheet, there is in the longitudinal direction veutro portion, crotch and drosal part, edge, the left and right sides at this drosal part is provided with a pair of pull stap, and the set portion of this pull stap is bonded to the taking in portion of the non-skin opposite face setting of this main body, is through with it wearer.
About the disposable diaper of deploying type, in patent documentation 1, record waist and/or waist portion at rear body (drosal part), disposed the improving technology of the disposable diaper of the deploying type of multiple elastomeric elements along horizontal direction (body width direction).The technology of recording in patent documentation 1, the configuring area of multiple above-mentioned elastomeric elements is divided into the central part area part and the end regions part that is positioned at its both sides of the flexible direction of this elastomeric element, configure design content at this central part area part in the mode that can see from outside, and in this end regions part, configure other design content different from the design content of this central part area part in the mode that can see from outside, more particularly, relatively more emphasize the flexible state of this elastomeric element in this end regions part compared with the flexible state of this elastomeric element in this central part area part, visually emphasize thus retractility and the flexible scope of this elastomeric element, the retractility of the waist to drosal part and/or waist portion and property next to the skin, give the impression of excellence sense more than wearer's practical extent.
Prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2008-183332 communique
Summary of the invention
The problem that invention will solve
In the disposable diaper of recording in patent documentation 1, the relation that arranges region of the allocation position of pull stap and multiple above-mentioned elastomeric elements is inappropriate, therefore, while dress, near the waist of drosal part (the length direction end of the drosal part side in main body and) is easily rolled to the direction of the skin that leaves wearer, and the property next to the skin in waist week is bad.In addition, in the time there is the rolling of such waist week, this turned up portion can the clothes of hooking on diaper, and thus, diaper is likely offset and drops.Whether in fact, the disposable diaper of recording in patent documentation 1 no matter have the problem of rolling in waist week, all easily drops in dress, in the property next to the skin in waist week and prevent from dropping aspect also have room for improvement.
The invention provides a kind of disposable diaper, it has main body, this main body comprises positive dough sheet, back sheet and the absorber between two sheets, there is in the longitudinal direction drosal part, crotch and veutro portion, edge, the left and right sides at this drosal part is provided with a pair of pull stap, and above-mentioned drosal part has at above-mentioned length direction: the absorber configuring area that exists the extension from above-mentioned crotch of above-mentioned absorber, there is not the non-configuring area of absorber of this extension, at above-mentioned drosal part, be included in the pars contractilis of the elastomeric element of the multiple identical fiber numbers that configure with elongation state between above-mentioned positive dough sheet and above-mentioned back sheet, be arranged on above-mentioned absorber configuring area and the non-configuring area of above-mentioned absorber, this pars contractilis is formed with bottom pars contractilis at this absorber configuring area, be formed with top pars contractilis at the non-configuring area of this absorber, dispose respectively multiple these elastomeric elements at this bottom pars contractilis and this top pars contractilis, form the multiple above-mentioned elastomeric element of above-mentioned pars contractilis, fiber number is below 450dtex, the flexible direction of this elastomeric element is consistent with the width of aforementioned body that is orthogonal to above-mentioned length direction, intermittently configuration on this length direction, at the above-mentioned elastomeric element of above-mentioned bottom pars contractilis configuration, cross this absorber in side's side of the foreign side of the above-mentioned width from above-mentioned absorber and extend to the opposing party's side and the part overlapping with this absorber, there is the non-pars contractilis manifesting of the retractility that has suppressed this elastomeric element, pars contractilis contractility compared with the pars contractilis of above-mentioned bottom in above-mentioned top is less, above-mentioned pull stap comprises: the band base portion engaging with aforementioned body, the band grip part that is connected with base portion with this and extends to the width foreign side of this main body, this is shorter with the length on above-mentioned length direction compared with base portion with this with grip part, with form in the multiple above-mentioned elastomeric element of above-mentioned pars contractilis, be positioned at above-mentioned length direction foreign side elastomeric element as one man, draw foreign side the first imaginary line extending at above-mentioned width, and while as one man drawing with the most square elastomeric element that is positioned at this length direction side the first imaginary line extending at this width, the upper end of the above-mentioned foreign side's side that is positioned at above-mentioned length direction with base portion, be positioned near of above-mentioned foreign side the first imaginary line and be positioned at compared with above-mentioned foreign side the first imaginary line the more square position by this length direction, or be positioned at compared with Gai foreign side the first imaginary line more the position by the foreign side of this length direction, in addition, be positioned at the above-mentioned bottom with base portion of a side contrary with above-mentioned upper end, be positioned near of above-mentioned side's the first imaginary line and be positioned at compared with above-mentioned side's the first imaginary line more the position by the foreign side of this length direction, or be positioned at and this square position by this length direction more compared with side's the first imaginary line, and the above-mentioned major part with base portion is present in the region being clipped by above-mentioned foreign side's the first imaginary line and interior above-mentioned side's the first imaginary line, with multiple above-mentioned elastomeric element in above-mentioned bottom pars contractilis configuration in, be positioned at the foreign side of above-mentioned length direction and the most square elastomeric element respectively as one man, while drawing 2 the second imaginary lines that extend at above-mentioned width, the above-mentioned major part with grip part is present in the region being clipped by 2 these the second imaginary lines.
Invention effect
Disposable diaper of the present invention, the property excellence next to the skin in waist week, is not easy skew and drops while dress.
Brief description of the drawings
Fig. 1 is the figure that schematically shows an embodiment of disposable diaper of the present invention, is to represent to make the elastomeric element of each several part to extend and the part that expands to the skin opposite face side (positive dough sheet side) of plane deployed condition is cut plane graph.
Fig. 2 is the schematic section in the I-I cross section (cross section of width) of presentation graphs 1.
Fig. 3 is the schematic section in the II-II cross section (cross section of width) of presentation graphs 1.
Fig. 4 is the figure for the structure of the pars contractilis of the disposable diaper shown in key diagram 1.
Detailed description of the invention
The present invention relates to be difficult to the disposable diaper that drops of skew in the property excellence next to the skin, dress in a kind of waist week.
Below, to disposable diaper of the present invention, describe with reference to accompanying drawing based on its preferred embodiment.The diaper 1 of present embodiment, as shown in FIG. 1 to 3, there is main body 10, this main body 10 comprises positive dough sheet 2, back sheet 3 and the absorber 4 between two sheets 2,3, there is in the longitudinal direction drosal part A, crotch B and the C of veutro portion, the edge, the left and right sides of drosal part A is provided with a pair of pull stap 6,6, is so-called flat type disposable diaper.
Further illustrate, main body 10 comprises: the positive dough sheet 2 that forms the liquid permeability of skin opposite face; Form the opaque liquid of non-skin opposite face or the back sheet 3 of water-repellancy (following, they are referred to as to opaque liquid); And the absorber 4 of the liquid retainability configuring between two sheets 2,3, be formed as longer elongate shape in a direction (directions X in figure).Positive dough sheet 2, back sheet 3 and absorber 4 all have longer elongate shape on a direction X.Positive dough sheet 2 and back sheet 3 have respectively the size larger than absorber 4, extend out to foreign side from the periphery of absorber 4.Positive dough sheet 2, as shown in Figure 2, the size of its width Y is less than the size of the width Y of back sheet 3.
Drosal part A is the part that is configured in wearer's dorsal part while wearing, and crotch B is the part that is configured in wearer's crotch while wearing, and the C of veutro portion is the part that is configured in wearer's veutro while wearing.Drosal part A, crotch B and the C of veutro portion are equivalent to respectively under the deployed condition of the main body 10 shown in Fig. 1 (diaper 1) main body 10 each field when trisection roughly on length direction X.Crotch B comprises while dress the relative portion of excretory portion with wearer's the relative configuration of excretory portion, is positioned at the central part of the length direction X of main body 10 (diaper 1).Main body 10 (diaper 1), as shown in Figure 1, is bent into inside circular-arcly along the both side edges of the length direction X of crotch B, in the plane graph shown in Fig. 1, have the hourglass-shaped shape of square shrinking in the mediad of length direction X.
In this description, length direction (directions X in figure) is that width (Y-direction in figure) is the direction orthogonal with this length direction along the direction on the long limit of disposable diaper or its component parts (absorber 4, main body 10 etc.).In addition, skin opposite face is the face towards wearer's skin side while wearing of the disposable diaper in disposable diaper or its component parts, and non-skin opposite face is the face towards a side contrary with skin side (side of wearing the clothes) while wearing of the disposable diaper in disposable diaper or its component parts.
Absorber 4 has essentially rectangular shape in the time overlooking, make the length direction X of its length direction and main body 10 as one man be configured in the central part of the width Y of main body 10, as shown in Figure 1, spread all over the total length of the length direction X of crotch B, and extend to respectively drosal part A and the C of veutro portion.Drosal part A has the extension 41 existing absorber configuring area A1 from crotch B of absorber 4 and does not have the non-configuring area A2 of absorber of extension 41 on length direction X.The non-configuring area A2 of absorber is the region being positioned between length direction one end 10a of drosal part A side of main body 10 and length direction one end 4a of the drosal part A side of absorber 4 (extension 41).
As shown in FIG. 1 to 3, in the both sides of the length direction X along main body 10, a pair of three-dimensional gauffer and a pair of leg creases, form by configure respectively gauffer formation elastomeric element with elongation state on length direction X.; in the both sides of the length direction X along main body 10; dispose respectively one or more (present embodiment is as 2) the three-dimensional gauffer that is fixed with wire taking elongation state at a side edge part and form the side seal portion 5 with elastomeric element 51; while dress, at least form a pair of three-dimensional gauffer at crotch B.In addition, before side seal portion 5 and back sheet 3 in the shank of the left and right configuring in wearer's lower limb week, one or more (present embodiment is 2) leg creases of wire form with elastomeric element 52 alongst X fix with elongation state, while dress, at described shank, by the contraction of this elastomeric element 52, form a pair of leg creases.A pair of side seal portion 5,5, positive dough sheet 2, absorber 4, gauffer form with elastomeric element 51,52 and back sheet 3, engage by the known joint method of heat molten type bonding agent etc.
In the edge, the left and right sides of the alongst X of the drosal part A of main body 10, be provided with a pair of pull stap 6,6.Pull stap 6, as shown in figures 1 and 3, comprising: the band base portion 60 engaging with main body 10 (sheet material 80 of pars contractilis 8 described later); The band grip part 61 extending out with the foreign side of the width Y to main body 10 being connected with base portion 60.At the skin opposite face with grip part 61, the 61a of set portion that the fastening sunny side parts of mechanicalness face form is installed.As shown in Figure 1, band grip part 61 is compared with band base portion 60, and the length of length direction X is shorter.Mean with base portion 60 and the greatest length with grip part 61 length direction X separately in this " length of length direction ".
In addition, be provided with and can taking of set band grip part 61 (61a of set portion) be with 7 at the non-skin opposite face of the C of veutro portion of main body 10.Taking and be with 7 by known joint method (for example to pass through, bonding agent or heat-sealing etc.) back part bonding fastening mechanicalness face is fixed on the non-skin opposite face of back sheet 3 and forms, can freely fix the band grip part 61 of carrying out set pull stap 6 departing from.
As shown in Figure 1, Figure 3 and Figure 4, at drosal part A, the pars contractilis 8 that is included in the elastomeric element 81 of the multiple identical fiber numbers that configure with elongation state between positive dough sheet 2 and back sheet 3 and form, arrange at absorber configuring area A1 and the non-configuring area A2 of absorber, pars contractilis 8 is formed with bottom pars contractilis 8A1 in absorber configuring area A1, in the non-configuring area A2 of absorber, is formed with top pars contractilis 8A2.Bottom pars contractilis 8A1 and top pars contractilis 8A2 are respectively arranged with multiple elastomeric elements 81.Multiple elastomeric elements 81 are intermittently configured on the length direction X of main body 10 in its flexible direction mode consistent with the width Y of main body 10.As shown in Figure 1 and Figure 4, in present embodiment, pars contractilis 8 is arranged on the Breadth Maximum part A3 of the length maximum of the width Y in drosal part A.The Breadth Maximum part A3 of drosal part A in present embodiment as shown in Figure 1 and Figure 4, is while comprising the overlooking of length direction one end 10a of the drosal part A side of main body 10 to be the region of rectangular shape.
The multiple elastomeric elements 81 that form pars contractilis 8, fiber number (rugosity) is below 450dtex, is preferably below the above 450dtex of 150dtex, more preferably below the above 400dtex of 300dtex.Use the thinner parts of such rugosity as elastomeric element 81, can make diaper 1 excessively not tie tight but fit in wearer's waist, can suppress the vestige of the elastomeric element that forms pars contractilis.In present embodiment, it is identical that multiple elastomeric elements 81 are not only fiber number, and length (length of flexible direction) is also mutually identical.The fiber number of multiple elastomeric elements 81 is mutually identical, compared with mutually mutually different situation, favourable aspect manufacturing cost, processability.
In present embodiment, pars contractilis 8, except multiple elastomeric elements 81, is also included in the sheet material 80 of configuration between positive dough sheet 2 and back sheet 3, and multiple elastomeric elements 81 are fixed on sheet material 80 with elongation state.More particularly, pars contractilis 8 in present embodiment comprises 2 sheet materials 80,80 of same shape (rectangular shape) and same size, and multiple elastomeric elements 81 are clamped and fixed between two sheet materials 80,80 of coincidence with elongation state by the known joint method of heat molten type bonding agent etc.2 sheet materials 80,80 are bonded on relative positive dough sheet 2 or back sheet 3 by known joint method respectively.Multiple elastomeric elements 81 extend respectively in the total length of the width Y of sheet material 80.
In present embodiment, pars contractilis 8 (sheet material 80), as shown in Figure 3, is engaged in band base portion 60 by known joint method, and a pair of pull stap 6,6 and therebetween pars contractilis 8 are integrated.Thus, when waiting and grip band grip part 61 separately of a pair of pull stap 6,6 with finger, while stretching to the foreign side of width Y, with its in linkage, pars contractilis 8 extends on width Y.Form the both ends of the width Y of the elastomeric element 81 of pars contractilis 8, overlapping with band base portion 60 in top view as shown in Figure 1.
As shown in Figure 1, Figure 3 and Figure 4, at the elastomeric element 81 of bottom pars contractilis 8A1 (part that is positioned at absorber configuring area A1 in pars contractilis 8) configuration, cross absorber 4 from side's side of the foreign side of the width Y of absorber 4 and extend to the opposing party's side, and have and suppressed the non-pars contractilis 82 that the retractility of this elastomeric element 81 manifests in the part overlapping with absorber 4 (with the non-skin opposite face of absorber 4 relative part).Elastomeric element 81 in bottom pars contractilis 8A1 (absorber configuring area A1) configuration is partly suppressed manifesting of retractility, non-pars contractilis 82 is not flexible, but the other parts (being positioned at the part of the foreign side of the width Y of absorber 4) beyond it are flexible.In addition, being disposed in the elastomeric element 81 of bottom pars contractilis 8A1 (absorber configuring area A1), other parts beyond non-pars contractilis 82, clip non-pars contractilis 82 and be positioned at side's side of width Y and the part of the opposing party's side, end and the absorber 4 overlapping (with reference to Fig. 3 and Fig. 4) of interior side's side of width Y separately.
On the other hand, at the elastomeric element 81 of top pars contractilis 8A2 (part that is positioned at the non-configuring area A2 of absorber in pars contractilis 8) configuration, as shown in Figure 1 and Figure 4, from another distolateral continuous extension of one end side direction of the width Y of drosal part A (Breadth Maximum part A3), the retractility originally having at its whole show.
In present embodiment, when the elastomeric element 81 of bottom pars contractilis 8A1 (absorber configuring area A1) is clipped between 2 sheet materials 80,80, in the top view shown in Fig. 1, to be fixed on two sheet materials 80,80 in not flexible mode with at least a portion (central part of the width Y of this part) of the overlapping part of absorber 4, this part becomes non-pars contractilis 82 thus.As making elastomeric element 81 not manifest the method (the formation method of non-pars contractilis 82) of retractility, normally used method in this disposable diaper of use that can be not particularly limited, for example, elastomeric element 81 is compactly cut off to its method of not stretching that makes, or by using the joint of bonding agent etc. to make method that elastomeric element 81 do not stretch etc.
Like this, the part overlapping at elastomeric element 81 and absorber 4 has non-pars contractilis 82, can not produce longitudinal gauffer along the end of the length direction X of wearer's buttocks configuration absorber 4 at absorber 4 thus, thus can Leakage prevention, and prevent the top butt skin of the gauffer producing at absorber 4 and cause producing the problems such as vestige.From reaching more reliably the viewpoint of such action effect, the length W6 (with reference to Fig. 4) of the width Y of non-pars contractilis 82 is preferably more than 70% below 95% with respect to the ratio (length W6/ length W5) of the length W5 (with reference to Fig. 4) of the width Y of absorber 4, more preferably more than 80% below 90%.Length (width) W6 of length (width) W5 of absorber 4 and non-pars contractilis 82, represents respectively the length of the width Y of the length the best part of the width Y in this part.
In addition, by making like this width W 6 of non-pars contractilis 82 less than the width W of absorber 45, the sidepiece of the alongst X of absorber 4 is fixed in the end of interior side's side of the width Y of the other parts beyond the non-pars contractilis 82 of elastomeric element 81, thus, in drosal part A, absorber 4 is connected at width Y by elastomeric element 81 with pull stap 6, has retractility as drosal part A entirety on width Y.So, in the time dressing diaper 1, conventionally, anchoring at while being with on 7 with overlapping the taking of extension 41 of the absorber 4 of the C of veutro portion with grip part 61 pull stap of drosal part A 6, form pars contractilis 8 and pull stap 6 (thering is the drosal part A of retractility) and taking the installation portion of the belt shape with 7 formations in wearer's waist portion, by the effect of such belt shape installation portion, the end, front and back of the length direction X of absorber 4 is reliably fixed on wearer's health, even absorber 4 absorbing and excreting things in wearing process and increased weight in the situation that, also can reach diaper 1 and be difficult to the effect that skew is dropped.
The contractility of pars contractilis 8 (bottom pars contractilis 8A1, top pars contractilis 8A2), based on action effect (weight when supporting absorber 4 has absorbed Excreta that reaches more reliably above-mentioned belt shape installation portion, make diaper 1 can not be offset and drop) viewpoint determine, for the top pars contractilis 8A2 that is positioned at the non-configuring area A2 of absorber, than the powerful contractility of paying attention to preventing that the skew of diaper 1 from dropping, flexibly the fit contractility of degree of health of the end with the length direction X that makes diaper 1 is even more important.From such a viewpoint, in present embodiment, top pars contractilis 8A2 is less than the bottom pars contractilis 8A1 contractility that is positioned at absorber configuring area A1, thus, when diaper 1 is worn, absorber 4 can be fixed on health reliably, and the end of the length direction X of diaper 1 health of flexibly fitting, thus, can prevent the leakage from this end.
The contractility of bottom pars contractilis 8A1 is preferably below the above 6.0N of 1.0N, and more preferably, below the above 4.0N of 1.5N, the contractility of top pars contractilis 8A2 is preferably below the above 3.0N of 0.5N, more preferably below the above 2.5N of 0.8N.The ratio (pars contractilis 8A1/ top, bottom pars contractilis 8A2) of the contractility of the contractility of bottom pars contractilis 8A1 and top pars contractilis 8A2 is preferably more than 1.2 below 5.0, more preferably more than 1.5 below 3.0.The contractility of the each several part of pars contractilis 8 is measured as follows.
< contractility assay method >
Cut out determination object part (part suitable with bottom pars contractilis 8A1 (with reference to Fig. 4) with top pars contractilis 8A2) as working sample from diaper.When mensuration, use Tensilon cupping machine (model RTA-100, rientech company of Co., Ltd. O manufactures), the natural length (not making the length of the naturalness of elastomeric element elongation) that distance between initial fixture is the diaper width from determination object part (drosal part A) deducts the length of 50mm, by working sample along part in the edge, the left and right sides of diaper length direction, that be positioned at the left and right sides at the position that disposes waist elastic members (elastomeric element 81), be sandwiched in respectively fixture.Like this, make the two ends of diaper width be clipped in the working sample in fixture, under the condition that is 300mm/min in crosshead (crosshead) translational speed, be stretched to the length that natural length from the width of diaper (natural length of positive dough sheet 2 or back sheet 3) deducts 20mm, the contractility using tensile load now as this working sample.
As mentioned above, as the method making the magnitude relationship of pars contractilis 8A2< bottom, top pars contractilis 8A1 set up aspect contractility, for example, 1) make the percentage elongation of the elastomeric element 81 configuring at top pars contractilis 8A2 be less than the method (method by the elastomeric element 81 in bottom pars contractilis 8A1 configuration to be fixed than the state more extending at the elastomeric element 81 of top pars contractilis 8A2 configuration) of the percentage elongation of the elastomeric element 81 configuring at bottom pars contractilis 8A1; 2) make method that the quantity of elastomeric element 81 of top pars contractilis 8A2 is fewer than the quantity of the elastomeric element 81 of bottom pars contractilis 8A1 etc., these methods can adopt separately, also can suitably be used in combination.In addition, at the elastomeric element 81 of pars contractilis 8 (bottom pars contractilis 8A1, top pars contractilis 8A2) configuration, preferably with its percentage elongation in more than 20%, particularly configure in the mode of more than 30% scope below 120%.Herein, percentage elongation refers to the ratio of the length of the part increasing with respect to the elongation of natural length, and for example, the elastomeric element of natural length 10cm extends in the situation for 20cm, and its percentage elongation is 100[=10/ (20-10)] %.In addition, in present embodiment, as previously mentioned, the mutual fiber number of multiple elastomeric elements 81 configuring at pars contractilis 8 must be identical, therefore can not adopt the method that uses the elastomeric element that fiber number is different at bottom pars contractilis 8A1 and top pars contractilis 8A2.
As shown in Figure 4, with form in multiple elastomeric elements 81 of pars contractilis 8, the elastomeric element 81 that is positioned at the foreign side of length direction X as one man draws the first imaginary line V1p of foreign side extending on width Y, and as one man draw with the most square elastomeric element 81 that is positioned at length direction X side the first imaginary line V1q extending on width Y, now, i) be positioned at the upper end 60p of the foreign side's side of the length direction X with base portion 60, be arranged near of the first imaginary line V1p of foreign side and be positioned at the side (below of Fig. 4) of length direction X compared with the first imaginary line V1p of Gai foreign side, or be arranged in the foreign side (top of Fig. 4) of length direction X compared with the first imaginary line V1p of foreign side, in addition, ii) be positioned at the bottom 60q with base portion 60 (being positioned at the end of the square side of the length direction X with base portion 60) of a side contrary with upper end 60p, be arranged near of side the first imaginary line V1q and be positioned at the foreign side (top of Fig. 4) of length direction X compared with side the first imaginary line V1q with this, or be arranged in the side (below of Fig. 4) of length direction X compared with interior side the first imaginary line V1q.Thus, the length W1 of length direction X with base portion 60 (, upper end 60p and bottom 60q leave distance) with the first imaginary line V1p of foreign side and interior side the first imaginary line V1q to leave distance L 1 roughly the same, or grow than leaving distance L 1.At this, mean the length of the length direction X of the length the best part with the length direction X in base portion 60 with the length W1 of base portion 60.In addition, " length W1 is with to leave distance L 1 roughly the same; or grow than leaving distance L 1 " refer to respect to the ratio (length W1/ leaves distance L 1) of length W1 of leaving distance L 1 in more than 70% scope below 110%, this ratio is preferably more than 75% below 100%, more preferably more than 80% below 100%.
So, upper and lower end parts 60p, 60q with base portion 60 lays respectively at the first corresponding imaginary line V1p, near of V1q, the overall contractility that forms thus multiple elastomeric elements 81 of pars contractilis 8 (bottom pars contractilis 8A1, top pars contractilis 8A2) can connect base portion 60, thus, the action effect of pars contractilis 8 (action effect of above-mentioned belt shape installation portion) can further work.In other words, from the viewpoint of the action effect of pars contractilis 8, upper and lower end parts 60p, 60q with base portion 60 is roughly present in the existing scope of multiple elastomeric elements 81 that forms pars contractilis 8, upper and lower end parts 60p, 60q also can, in the scope of contractility that does not hinder elastomeric element 81, be present in the foreign side in the region being clipped by 2 the first imaginary line V1p, V1q.
In addition, in present embodiment, except above-mentioned i) and ii), also there is following characteristics iii) major part with base portion 60, be present in the region being clipped by the first imaginary line V1p of foreign side and interior side the first imaginary line V1q.Refer to the band base portion central area over half that comprises the center of the length direction X with base portion 60 and account for the whole area with base portion 60 in this " with major part of base portion ".Be present in the region being clipped by 2 the first imaginary line V1p, V1q with the major part of base portion 60, thus, for band base portion 60, the contractility that forms multiple elastomeric elements 81 of pars contractilis 8 responds well, and the action effect (action effect of above-mentioned belt shape installation portion) of pars contractilis 8 is further embodied.
In addition, in present embodiment, as shown in Figure 4, iv) with foreign sides in multiple elastomeric elements 81 of bottom pars contractilis 8A1 configuration, that be positioned at length direction X and the most square elastomeric element 81,81 respectively as one man, draw 2 the second imaginary line V2, V2 on width Y, extending, now, be present in the major part of grip part 61 region being clipped by 2 the second imaginary line V2, V2.The most square straight line that is positioned at length direction X in 2 the second imaginary line V2, V2 is with side the first imaginary line V1q is identical.Refer to the central area, band grip part over half that comprises the center of the length direction X with grip part 61 and account for the whole area with grip part 61 in this " with major part of grip part ".Be present in the region being clipped by 2 the second imaginary line V2, V2 with the major part of grip part 61, thus, for band grip part 61, the contractility that forms multiple elastomeric elements 81 of bottom pars contractilis 8A1 can transmit selectively, can further embody the action effect (action effect of above-mentioned belt shape installation portion) of pars contractilis 8.
The diaper 1 of present embodiment, have above-mentioned i)～iv) feature, while dress thus, can by the contractility of multiple elastomeric elements 81 of the formation pars contractilis 8 in drosal part A by with base portion 60 globalities link with the pull stap 7 of the C of veutro portion, and, by band grip part 61, by the contractility emphasis of the elastomeric element 81 in bottom pars contractilis 8A1 configuration be linked to and the C of veutro portion be with 7 with overlapping the taking of extension 41 absorber 4, thus, the end, front and back of the length direction X of absorber 4 and bottom pars contractilis 8A1 (sheet material 80), band base portion 60, be with together with 7 with taking band grip part 61, be mounted to the belt shape of the waist portion that surrounds wearer, become a component parts of above-mentioned belt shape installation portion, therefore be fixed on reliably on health, even absorber 4 absorbing and excreting things and having increased in the situation of weight in dress, also can reach diaper 1 and be difficult to the effect that skew is dropped.In addition, particularly by thering is above-mentioned iv) feature, with the major part of grip part 61, in fact above-mentioned pars contractilis 8A2 in the foreign side that is positioned at the region being clipped by 2 the second imaginary line V2, V2 does not exist, therefore,, in the pars contractilis 8A2 of top, the contractility discharging from bottom pars contractilis 8A1 flexibly plays a role, being fitted on health of the end softness of the length direction X of diaper 1, can effectively prevent thus from this end leakage.Generally speaking, in the dress of diaper 1, can effectively prevent that the skew of diaper 1 from dropping, and the problem that near the waist (length direction one end 10a of the drosal part A side of main body 10 and) that is difficult for producing drosal part A is rolled to the direction of skin of leaving wearer, improves the property next to the skin in waist week.
In the present invention, from making the action effect of above-mentioned belt shape installation portion feed through to above-mentioned three-dimensional gauffer and/or above-mentioned leg creases, further improving the property next to the skin of two gauffers and the viewpoint of anti-leakage sets out, the preferably at least one party's of two gauffers gauffer formation elastomeric element, as shown in Figure 1, in the top view of main body 10 (diaper 1), an end and the pars contractilis 8 of its length direction X are overlapping, the other end with taking be with 7 overlapping.In present embodiment, as shown in Figure 1, three-dimensional gauffer form with elastomeric element 51 and pars contractilis 8 with taking be with 7 overlapping, on the other hand, leg creases form with elastomeric element 52 not with pars contractilis 8 and taking be with 7 overlapping, still, this elastomeric element 52 also can with pars contractilis 8 with take be with 7 overlapping.With pars contractilis 8 and taking with 7 overlapping three-dimensional gauffers and form with elastomeric element 51, conventionally as shown in Figure 3, via side seal portion 5 sheet materials such as grade, indirectly with this pars contractilis 8 with taking and be with 7 links.In addition, with pars contractilis 8 with taking with 7 overlapping leg creases and form with elastomeric element 52, conventionally via back sheet 3 sheet materials such as grade, indirectly taking and be with 7 links with this pars contractilis 8 and this.
So, three-dimensional gauffer forms with elastomeric element 51, be with 7 (C of veutro portion) overlapping (link indirectly) respectively in top view with the pars contractilis 8 (drosal part A) and taking that forms above-mentioned belt shape installation portion, thus, above-mentioned three-dimensional gauffer and the interlock of this belt shape installation portion, the chain effect of action effect (absorber 4 is fixed on wearer's health) with this belt shape installation portion, more easily make this solid gauffer laminating health, thus, further embody the action effect (Leakage prevention) that this solid gauffer brings.In addition, leg creases forms with elastomeric element 52 and pars contractilis 8 and is taking with 7 respectively overlapping in top view (link indirectly) in the situation that, above-mentioned leg creases and the interlock of above-mentioned belt shape installation portion, the chain effect of action effect with this belt shape installation portion, more easily make this leg creases laminating health, thus, further embody the action effect (Leakage prevention) that this leg creases is brought.So, absorber 4 is fixed on health in the time wearing based on above-mentioned belt shape installation portion, and make to be independent of above-mentioned three-dimensional gauffer, the above-mentioned leg creases that absorber 4 (separating with absorber 4) exists, arrange along this health based on this belt shape installation portion, can become thus the state of more difficult generation leakage problem.
In addition, in present embodiment, as shown in Figure 4, with in multiple elastomeric elements 81 of top pars contractilis 8A2 configuration, be positioned at the foreign side of length direction X and the most square elastomeric element 81,81 respectively as one man, draw 2 the 3rd imaginary line V3, V3 on width Y, extending, now, 2 the 3rd imaginary line V3, V3 to leave leaving compared with distance L 2 of distance L 3 and 2 the second imaginary line V2, V2 shorter.In 2 the 3rd imaginary line V3, V3, be positioned at the straight line of the foreign side of length direction X, identical with the first imaginary line V1p of foreign side.So, leave distance L 3< and leave distance L 2, thus, can embody more reliably above-mentioned action effect (property next to the skin in waist week and the raising that prevents from being offset the performance that drops).The ratio (L2/L3) that leaves distance L 2 and leave distance L 3 is preferably more than 45% below 75%, more preferably more than 50% below 65%.
In addition, the length W2 (with reference to Fig. 4) of the length direction X with grip part 61 is preferably the more than 70% of length W3 (with reference to Fig. 1) of taking with 7 length direction X, is particularly preferably more than 80% below 100%.When the length W2 with grip part 61 is taking with 70% when above of 7 length W3, can make taking while being with on 7 band grip part 61 is anchored at, the folding wrinkle that the periphery of this in this is taking with 7 with grip part 61 produces is less, the next to the skin property of the end, front and back of length direction X of thus, further improving absorber 4 to health.With the length W2 of grip part 61, mean the length of the length direction X of the length the best part with the length direction X in grip part 61.In present embodiment, with the length W2 of grip part 61, as shown in Figure 1 and Figure 4, along with going to reduce successively to the foreign side of width Y, be therefore the length W2 with grip part 61 with the length of the length direction X by the part with base portion 60 in grip part 61.In addition, take the length W3 with 7, meaning the length of the length direction X that is taking the length the best part with the length direction X in 7.
In addition, as previously mentioned, pars contractilis 8 is arranged on the Breadth Maximum part A3 of drosal part A, the more than 60% of length W4 (with reference to Fig. 4) that leaves distance L 1 and be preferably the length direction X of Breadth Maximum part A3 of the first imaginary line V1p of foreign side and interior side the first imaginary line V1q, is particularly preferably more than 70% below 100%.60% when above of the length W4 that leaves the Breadth Maximum part A3 that distance L 1 is drosal part A of 2 the first imaginary line V1p, V1q, can further improve the property next to the skin in waist week and prevent the performance that skew is dropped, and, the position of flank (being positioned at the part of the foreign side of the width Y of the absorber 4) laminating of drosal part A from wearer's buttocks to shank, the flank of coupled crotch B draws high wearer's waist top, the property next to the skin that can improve lower limb week, result is Leakage prevention effectively.
From the viewpoint of the above-mentioned action effect of further raising (property next to the skin in waist week and the performance that prevents that skew from dropping), the size of the each several part of diaper 1 etc. is preferably as follows setting.
The the first imaginary line V1p of foreign side and interior side the first imaginary line V1q leave distance L 1 (with reference to Fig. 4), be the length in fact in pars contractilis 8 with the length direction X of the continuous stretching region of retractility, be preferably below the above 100mm of 50mm, more preferably below the above 90mm of 60mm.
2 the second imaginary line V2, V2 leave distance L 2 (with reference to Fig. 4), be the length that bottom pars contractilis 8A1 (being arranged in the part of absorber configuring area A1 in pars contractilis 8) has in fact the length direction X of the part of retractility, be preferably below the above 60mm of 20mm, more preferably below the above 40mm of 30mm.
2 the 3rd imaginary line V3, V3 leave distance L 3 (with reference to Fig. 4), be the length that top pars contractilis 8A2 (being arranged in the part of the non-configuring area A2 of absorber in pars contractilis 8) has in fact the length direction X of the part of retractility, be preferably below the above 40mm of 10mm, more preferably below the following 30mm of 20mm.
The length W1 (with reference to Fig. 4) of length direction X with base portion 60 is preferably below the above 100mm of 50mm, more preferably below the above 90mm of 60mm,
The length W2 (with reference to Fig. 4) of length direction X with grip part 61 is preferably below the above 60mm of 20mm, more preferably below the above 40mm of 30mm.
Taking with the length W3 (with reference to Fig. 1) of 7 length direction X and be preferably below the above 80mm of 30mm, more preferably below the above 60mm of 40mm.
The length W4 (with reference to Fig. 4) of the length direction X of the Breadth Maximum part A3 of drosal part A is preferably below the above 120mm of 60mm, more preferably below the above 100mm of 70mm.
The length W5 (with reference to Fig. 4) of the width Y of absorber 4 is preferably below the above 140mm of 80mm, more preferably below the above 120mm of 90mm.
The length W6 (with reference to Fig. 4) of the width Y of non-pars contractilis 82 is preferably below the above 120mm of 70mm, more preferably below the above 110mm of 90mm.
In addition, the length W2 of the length direction X with grip part 61 is preferably more than 70% below 100% with respect to the ratio of leaving distance L 2 (length W2/ leaves distance L 2) of 2 the second imaginary line V2, V2, more preferably more than 80% below 100%.
In addition, the length W2 of length direction X with grip part 61 is preferably more than 40% below 70% with respect to the ratio (length W2/ length W1) of the length W1 of the length direction X with base portion 60 (being the distance of leaving of upper end 60p and bottom 60q), more preferably more than 50% below 60%.
On length direction X, the interval T 1 (with reference to Fig. 4) of 2 of adjacency elastomeric elements 81,81 is preferably below the above 8mm of 3mm, more preferably below the above 6mm of 4mm.In pars contractilis 8 (bottom pars contractilis 8A1, top pars contractilis 8A2), multiple interval T 1 can be mutually identical, also can be mutually different.
The quantity that forms the elastomeric element 81 of pars contractilis 8 is preferably 8 above below 30, more preferably 10 above below 20, be preferably more than 5 below 20 in the quantity of the elastomeric element 81 of bottom pars contractilis 8A1 configuration, more preferably 10 above below 15, be preferably more than 3 below 10 more preferably 4 above below 8 in the quantity of the elastomeric element 81 of top pars contractilis 8A2 configuration.
Formation material to the each several part beyond positive dough sheet 2 in diaper 1 describes, and as positive dough sheet 2, back sheet 3, absorber 4 and side seal portion 5, can use respectively the various materials that always use in this technical field.As positive dough sheet 2, can use the sheet with liquid permeability, for example can use non-woven fabrics or apertured film etc.As back sheet 3, can use opaque liquid and there is the sheet of poisture-penetrability, for example, thereby can use laminated body of the non-woven fabrics such as resin molding, drying non-woven fabrics that there is the minute aperture that connects sheet on thickness direction and there is poisture-penetrability, they and other sheet etc.As absorber 4, for example can use the absorbent core of the liquid retainability of the water absorbent polymer of the various shapes such as fibrous material, graininess that comprise paper pulp fiber etc., this absorbent core also can be covered outer surface (skin opposite face and non-skin opposite face) by the clad sheet of the liquid permeability of the paper such as cotton paper or various non-woven fabrics, apertured film etc.In addition, as side seal portion 5, the non-woven fabrics of water-repellancy or the sheet of resin molding system can be used, the material identical with back sheet 3 can be used.
As the sheet material 80 that forms pars contractilis 8, for example, can use spun-bonded/melt-blown/spunbond (SMS) of polypropylene fibre formation etc.The grammes per square metre (mass area ratio) of sheet material 80 is preferably 8g/m 2above 20g/m 2below, 10g/m more preferably 2above 15g/m 2below.In addition, as the elastomeric element 81 that forms pars contractilis 8, can use in this technical field the various wire that always use or the elastomeric element of rope form, as its raw material, can enumerate phenylethylene rubber, olefin rubber, polyurethanes rubber, polyethylene, styrene butadiene, silicone etc.
The diaper 1 of present embodiment, can with common same use of flat type disposable diaper with pull stap.The diaper 1 of present embodiment, there is above-mentioned specific structure, the relation of the allocation position of pull stap 6 and pars contractilis 8 is suitable, therefore, in dress, the problem that near the waist (length direction one end 10a of the drosal part A side of main body 10 and) that is difficult for producing drosal part A is rolled to the direction of skin of leaving wearer, the stickiness excellence in waist week, is difficult to skew and drops.
The invention is not restricted to above-mentioned embodiment, can change without departing from the spirit and scope of the invention.For example, in above-mentioned embodiment, form the both ends of the width Y of the elastomeric element 81 of pars contractilis 8, in top view as shown in Figure 1, overlapping with band base portion 60, but can be not overlapping yet, also can be in the end that has the width Y of elastomeric element 81 from the position of leaving predetermined distance to the interior side of width Y with base portion 60.In other words, elastomeric element 81, its entirety can be configured in the region being clipped by pair of right and left band base portion 60,60.
In addition, pars contractilis 8 is at least included in the elastomeric element 81 of the multiple identical fiber numbers that configure with elongation state between positive dough sheet 2 and back sheet 3 and forms, and also can not comprise sheet material 80.In this case, in positive dough sheet 2 and back sheet 3 with 2 the first imaginary line V1p, V1q leave part corresponding to distance L 1 (with reference to Fig. 4), play a role as the continuous stretching region in fact with retractility.In addition, the number of sheet material 80 also can be 1.
For the embodiment of the invention described above, following content (disposable diaper) is also disclosed.
<1> disposable diaper, it has main body, this main body comprises positive dough sheet, back sheet and the absorber between two sheets, there is in the longitudinal direction drosal part, crotch and veutro portion, edge, the left and right sides at this drosal part is provided with a pair of pull stap
Above-mentioned drosal part has at above-mentioned length direction: the absorber configuring area that exists the extension from above-mentioned crotch of above-mentioned absorber; There is not the non-configuring area of absorber of this extension,
At above-mentioned drosal part, be included in the pars contractilis of the elastomeric element of the multiple identical fiber numbers that configure with elongation state between above-mentioned positive dough sheet and above-mentioned back sheet, be arranged on above-mentioned absorber configuring area and the non-configuring area of above-mentioned absorber, this pars contractilis is formed with bottom pars contractilis at this absorber configuring area, be formed with top pars contractilis at the non-configuring area of this absorber, dispose respectively multiple these elastomeric elements at this bottom pars contractilis and this top pars contractilis
Form the multiple above-mentioned elastomeric element of above-mentioned pars contractilis, fiber number is below 450dtex, and the flexible direction of this elastomeric element is consistent with the width of aforementioned body that is orthogonal to above-mentioned length direction, intermittently configuration on this length direction,
At the above-mentioned elastomeric element of above-mentioned bottom pars contractilis configuration, cross this absorber in side's side of the foreign side of the above-mentioned width from above-mentioned absorber and extend to the opposing party's side and the part overlapping with this absorber, there is the non-pars contractilis manifesting of the retractility that has suppressed this elastomeric element
Pars contractilis contractility compared with the pars contractilis of above-mentioned bottom in above-mentioned top is less,
Above-mentioned pull stap comprises: the band base portion engaging with aforementioned body; The band grip part that is connected with base portion with this and extends to the width foreign side of this main body, this is shorter with the length on above-mentioned length direction compared with base portion with this with grip part,
With the elastomeric element that forms foreign side in the multiple above-mentioned elastomeric element of above-mentioned pars contractilis, that be positioned at above-mentioned length direction as one man, draw foreign side the first imaginary line extending at above-mentioned width, and while as one man drawing with the most square elastomeric element that is positioned at this length direction side the first imaginary line extending at this width
The upper end of the above-mentioned foreign side's side that is positioned at above-mentioned length direction with base portion, be positioned near of above-mentioned foreign side the first imaginary line and be positioned at compared with above-mentioned foreign side the first imaginary line the more square position by this length direction, or be positioned at compared with Gai foreign side the first imaginary line more the position by the foreign side of this length direction
In addition, be positioned at the above-mentioned bottom with base portion of a side contrary with above-mentioned upper end, be positioned near of above-mentioned side's the first imaginary line and be positioned at compared with above-mentioned side's the first imaginary line more the position by the foreign side of this length direction, or be positioned at and this square position by this length direction more compared with side's the first imaginary line, and
The above-mentioned major part with base portion is present in the region being clipped by above-mentioned foreign side's the first imaginary line and interior above-mentioned side's the first imaginary line,
With multiple above-mentioned elastomeric element in above-mentioned bottom pars contractilis configuration in, the foreign side that is positioned at above-mentioned length direction and the most square elastomeric element respectively as one man, while drawing 2 the second imaginary lines that extend at above-mentioned width, the above-mentioned major part with grip part is present in the region being clipped by 2 these the second imaginary lines.
The disposable diaper of <2> as described in above-mentioned <1>, wherein, with multiple above-mentioned elastomeric element in above-mentioned top pars contractilis configuration in, the foreign side that is positioned at above-mentioned length direction and the most square elastomeric element respectively as one man, while drawing 2 the 3rd imaginary lines that extend at above-mentioned width, the distance of leaving of 2 the 3rd imaginary lines is compared short with the distance of leaving of 2 above-mentioned the second imaginary lines.
The disposable diaper of <3> as described in above-mentioned <1> or <2>, wherein, above-mentioned pars contractilis is arranged on the Breadth Maximum part of the length maximum of the above-mentioned width in above-mentioned drosal part, the more than 60% of length of the above-mentioned length direction that leaves the Breadth Maximum part that distance is this drosal part of above-mentioned foreign side's the first imaginary line and interior above-mentioned side's the first imaginary line.
The disposable diaper of <4> as described in any one in above-mentioned <1>～<3>, wherein, be provided with and can set is above-mentioned be with taking of grip part at the non-skin opposite face of above-mentioned veutro portion, the length of this above-mentioned length direction with grip part is this more than 70% of length of taking this length direction of band.
The disposable diaper of <5> as described in above-mentioned <4>, wherein, the length of the above-mentioned above-mentioned length direction with grip part is preferably more than 80% below 100% of length of the above-mentioned length direction of taking band.
The disposable diaper of <6> as described in above-mentioned <4> or <5>, wherein, more than the length of the above-mentioned above-mentioned length direction of taking band is preferably 30mm, more preferably more than 40mm, and be preferably below 80mm, more preferably below 60mm.
The disposable diaper of <7> as described in any one in above-mentioned <4>～<6>, wherein, in the both sides alongst of aforementioned body, a pair of three-dimensional gauffer and a pair of leg creases are by forming gauffer formation on this length direction with elastomeric element respectively with elongation state configuration
At least one party's of above-mentioned three-dimensional gauffer and above-mentioned leg creases above-mentioned gauffer formation elastomeric element, in the time overlooking aforementioned body, an end and the above-mentioned pars contractilis of its above-mentioned length direction are overlapping, the other end and above-mentioned taking be with overlapping.
The disposable diaper of <8> as described in any one in above-mentioned <1>～<7>, wherein, form the fiber number of multiple above-mentioned elastomeric elements of above-mentioned pars contractilis, more than being preferably 150dtex, more preferably more than 300dtex, and be preferably below 450dtex, more preferably below 400dtex.
The disposable diaper of <9> as described in any one in above-mentioned <1>～<8>, wherein, above-mentioned pars contractilis, except multiple above-mentioned elastomeric elements, also be included in 2 sheet materials that configure between above-mentioned positive dough sheet and above-mentioned back sheet, multiple these elastomeric elements are clamped between 2 these sheet materials with elongation state
Above-mentioned non-pars contractilis, in the time that the elastomeric element of above-mentioned bottom pars contractilis is clipped between 2 above-mentioned sheet materials, when by overlooking in this elastomeric element and at least a portion of the overlapping part of above-mentioned absorber be fixed on two sheet materials in not flexible mode and form.
The disposable diaper of <10> as described in any one in above-mentioned <1>～<9>, wherein, the length of the above-mentioned width of above-mentioned non-pars contractilis is with respect to the ratio of the length of the above-mentioned width of above-mentioned absorber, be preferably more than 70%, more preferably more than 80%, and be preferably below 95%, more preferably below 90%.
The disposable diaper of <11> as described in any one in above-mentioned <1>～<10>, wherein, more than the contractility of above-mentioned bottom pars contractilis is preferably 1.0N, more preferably more than 1.5N, and be preferably below 6.0N, more preferably 4.0N, more than the contractility of above-mentioned top pars contractilis is preferably 0.5N, more preferably more than 0.8N, and be preferably below 3.0N, more preferably below 2.5N.
The disposable diaper of <12> as described in any one in above-mentioned <1>～<11>, wherein, the ratio (pars contractilis/top, bottom pars contractilis) of the contractility of the contractility of above-mentioned bottom pars contractilis and above-mentioned top pars contractilis is preferably more than 1.2, more preferably more than 1.5, and be preferably below 5.0, more preferably below 3.0.
The disposable diaper of <13> as described in any one in above-mentioned <1>～<12>, wherein, in above-mentioned pars contractilis, there is in fact the length of the above-mentioned length direction of the continuous stretching region of retractility, more than being preferably 50mm, more preferably more than 60mm, and be preferably below 100mm, more preferably below 90mm.
The disposable diaper of <14> as described in any one in above-mentioned <1>～<13>, wherein, more than the length in the pars contractilis of above-mentioned bottom with the above-mentioned length direction of retractility part is preferably 20mm, more preferably more than 30mm, be preferably below 60mm, more preferably below 40mm.
The disposable diaper of <15> as described in any one in above-mentioned <1>～<14>, wherein, more than the length of the above-mentioned above-mentioned length direction with base portion is preferably 50mm, more preferably more than 60mm, and be preferably below 100mm, more preferably below 90mm.
The disposable diaper of <16> as described in any one in above-mentioned <1>～<15>, wherein, more than the length of the above-mentioned above-mentioned length direction with grip part is preferably 20mm, more preferably more than 30mm, and be preferably below 60mm, more preferably below 40mm.
The disposable diaper of <17> as described in any one in above-mentioned <1>～<16>, wherein, more than the length of the above-mentioned length direction of the Breadth Maximum part of above-mentioned drosal part is preferably 60mm, more preferably more than 70mm, and be preferably below 120mm, more preferably below 100mm.
The disposable diaper of <18> as described in any one in above-mentioned <1>～<17>, wherein, more than the length of the above-mentioned width of above-mentioned absorber is preferably 80mm, more preferably more than 90mm, and be preferably below 140mm, more preferably below 120mm.
The disposable diaper of <19> as described in any one in above-mentioned <1>～<18>, wherein, more than the length of the above-mentioned width of above-mentioned non-pars contractilis is preferably 70mm, more preferably more than 90mm, and be preferably below 120mm, more preferably below 110mm.
The disposable diaper of <20> as described in any one in above-mentioned <1>～<19>, wherein, the length of the above-mentioned above-mentioned length direction with grip part is with respect to the ratio of the length of the above-mentioned above-mentioned length direction with base portion, be preferably more than 40%, more preferably more than 50%, and be preferably below 70%, more preferably below 60%.
The disposable diaper of <21> as described in any one in above-mentioned <1>～<20>, wherein, form the quantity of the above-mentioned elastomeric element of above-mentioned pars contractilis, be preferably more than 8, more preferably more than 10, and be preferably below 30, more preferably below 20, the quantity of the above-mentioned elastomeric element configuring at above-mentioned bottom pars contractilis, be preferably more than 5, more preferably more than 10, and be preferably below 20, more preferably below 15, the quantity of the above-mentioned elastomeric element configuring at above-mentioned top pars contractilis, be preferably more than 3, more preferably more than 4, and be preferably below 10, more preferably below 8.
The disposable diaper of <22> as described in any one in above-mentioned <1>～<21>, wherein, forming the sheet material of above-mentioned pars contractilis, is spun-bonded/melt-blown/spunbond (SMS) non-woven fabrics that comprises polypropylene fibre.
The disposable diaper of <23> as described in any one in above-mentioned <22>, wherein, the grammes per square metre of above-mentioned sheet material is preferably 8g/m 2above, 10g/m more preferably 2above, and be preferably 20g/m 2below, 15g/m more preferably 2below.
Embodiment
Below, be described more specifically the present invention by embodiment, but the present invention is not limited to the examples.
(embodiment 1)
Making has the disposable diaper of the deploying type of the basic structure same with the diaper 1 shown in Fig. 1～Fig. 4, sets it as the sample of embodiment 1.The size of each several part etc. (allocation position of pull stap etc.) table 1 described as follows is set.In addition, in order to make the flexible stress of pars contractilis 8, between the bottom pars contractilis 8A1 at absorber configuring area A1 and top pars contractilis 8A2 at the non-configuring area A2 of absorber different (magnitude relationship of pars contractilis 8A2< bottom, top pars contractilis 8A1 is set up), at top pars contractilis 8A2,5 elastomeric elements 81 are configured taking percentage elongation as 30% mode respectively, at bottom pars contractilis 8A1,9 elastomeric elements 81 are configured taking percentage elongation as 50% mode respectively.As positive dough sheet, use grammes per square metre is 25g/m 2the hot-wind nonwoven cloth of liquid permeability.As back sheet and side seal portion, use respectively grammes per square metre for 20g/m 2opaque liquid and the resin molding (cooperation calcium carbonate) manufactured of the polyethylene of poisture-penetrability.As absorber, use will comprise Time of Fluff Slurry (fluff pulp) 160g/m 2with water absorbent polymer 250g/m 2total grammes per square metre of homogeneous mixture be 410g/m 2the outer surface of absorbent core, use grammes per square metre is 20g/m 2liquid permeability cotton paper cover parts.The overall length of the length direction of this absorbent core is 370mm, and the overall length (greatest length) of width is 115mm.As 2 sheet materials that form pars contractilis, use and comprise that the grammes per square metre of acrylic resin is 15g/m respectively 2sMS non-woven fabrics, in addition, as multiple elastomeric elements, use the elastomeric element of the wire that the polyurethane of fiber number 450dtex makes.Elastomeric element is undertaken by heat molten type bonding agent to the fixing of sheet material.
(embodiment 2～4 and comparative example 1～2)
Except (allocation positions of pull stap etc.) such as the sizes of suitable change each several part, make similarly to Example 1 the disposable diaper of deploying type, as embodiment 2 and 3 and the sample of each comparative example.As the elastomeric element that forms pars contractilis, the elastomeric element of the wire that the polyurethane of use fiber number 310dtex is made, in addition, makes flat type disposable diaper, similarly to Example 1 as the sample of embodiment 4.
(evaluation)
To each sample (disposable diaper) of embodiment and comparative example, by following method evaluation property next to the skin, skew dropping.These the results are shown in following table 1.In addition, the symbol of W1, the L1 etc. in table 1 is corresponding to the same-sign in figure.
The evaluation methodology > of < property next to the skin
On the Infant model of propylene processed with acid, wear and have under the state of sample, the outward appearance of visualization sample, and touch sample with hands, sensory evaluation has or not lax from the floating of the skin face of this model of sample, sample, do not exist and float and lax situation is A, exist to a certain degree float and lax but in practical no problem situation be B, float, the lax situation that exists is morely C.
The evaluation methodology > of < skew dropping
In sample, inject 200g artificial urine, afterwards, this sample is worn on the Infant model of polyurethane system, measure the skew amount of dropping that sample when two lower limb left and right of this model are opened to 20 times is lighted from benchmark, it is A that the situation (situation that the skew amount of dropping is almost nil) dropping does not almost occur to be offset, visible skew to a certain degree drop but in practical no problem situation (the skew amount of dropping is the situation below 10mm) be B, the situation (the skew amount of dropping exceedes the situation of 10mm) that high-visible skew is dropped is C.Artificial urine composed as follows.Carbamide 1.94 quality %, sodium chloride 0.7954 quality %, magnesium sulfate (heptahydrate) 0.11058 quality %, calcium chloride (dihydrate) 0.06208 quality %, potassium sulfate 0.19788 quality %, polyoxyethylene lauryl ether 0.0035 quality % and ion exchange water (residual volume)
Table 1
As shown in table 1, the property next to the skin of any of the disposable diaper of embodiment is all excellent, and difficult skew is dropped.On the other hand, the disposable diaper of comparative example 1, is mainly that result property next to the skin is poor because major part with base portion is not present in the region (with reference to Fig. 4) being clipped by the first imaginary line V1p of foreign side and interior side the first imaginary line V1q.In addition, the disposable diaper of comparative example 2, main because the major part with grip part is not present in the region (with reference to Fig. 4) being clipped by 2 the second imaginary line V2, V2, result prevents the poor performance that skew is dropped.As mentioned above, in order to improve the property next to the skin of disposable diaper, in multiple elastomeric elements of pars contractilis configuration and the position relationship particular importance of the major part with base portion of drosal part, in addition, in order to improve the performance that prevents that skew from dropping, in multiple elastomeric elements of bottom pars contractilis 8A1 configuration and the position relationship particular importance of the major part with grip part.

Claims (5)

1. a disposable diaper, it has main body, and this main body comprises positive dough sheet, back sheet and the absorber between two sheets, has in the longitudinal direction drosal part, crotch and veutro portion, edge, the left and right sides at this drosal part is provided with a pair of pull stap, and this disposable diaper is characterised in that:
Described drosal part has at described length direction: the absorber configuring area that exists the extension from described crotch of described absorber; There is not the non-configuring area of absorber of this extension,
At described drosal part, be included in the pars contractilis of the elastomeric element of the multiple identical fiber numbers that configure with elongation state between described positive dough sheet and described back sheet, be arranged on described absorber configuring area and the non-configuring area of described absorber, this pars contractilis is formed with bottom pars contractilis at this absorber configuring area, be formed with top pars contractilis at the non-configuring area of this absorber, dispose respectively multiple these elastomeric elements at this bottom pars contractilis and this top pars contractilis
Form the multiple described elastomeric element of described pars contractilis, fiber number is below 450dtex, and the flexible direction of this elastomeric element is consistent with the width of described main body that is orthogonal to described length direction, intermittently configuration on this length direction,
At the described elastomeric element of described bottom pars contractilis configuration, cross this absorber in side's side of the foreign side of the described width from described absorber and extend to the opposing party's side and the part overlapping with this absorber, there is the non-pars contractilis manifesting of the retractility that has suppressed this elastomeric element
Pars contractilis contractility compared with the pars contractilis of described bottom in described top is less,
Described pull stap comprises: the band base portion engaging with described main body; The band grip part that is connected with base portion with this and extends to the width foreign side of this main body, this is shorter with this length with described length direction compared with base portion with grip part,
With the elastomeric element that forms foreign side in the multiple described elastomeric element of described pars contractilis, that be positioned at described length direction as one man, draw foreign side the first imaginary line extending at described width, and while as one man drawing with the most square elastomeric element that is positioned at this length direction side the first imaginary line extending at this width
The upper end of the described foreign side's side that is positioned at described length direction with base portion, near of foreign side the first imaginary line and be positioned at compared with described foreign side the first imaginary line the more square position by this length direction described in being positioned at, or be positioned at compared with Gai foreign side the first imaginary line more the position by the foreign side of this length direction
Be positioned at the described bottom with base portion of a side contrary with described upper end, near of side's the first imaginary line and be positioned at compared with described side's the first imaginary line more the position by the foreign side of this length direction described in being positioned at, or be positioned at and this square position by this length direction more compared with side's the first imaginary line, and
The described major part with base portion is present in the region being clipped by described foreign side's the first imaginary line and interior described side's the first imaginary line,
With multiple described elastomeric element in described bottom pars contractilis configuration in, the foreign side that is positioned at described length direction and the most square elastomeric element respectively as one man, while drawing 2 the second imaginary lines that extend at described width, the described major part with grip part is present in the region being clipped by 2 these the second imaginary lines.
2. disposable diaper as claimed in claim 1, is characterized in that:
With multiple described elastomeric element in described top pars contractilis configuration in, the foreign side that is positioned at described length direction and the most square elastomeric element respectively as one man, while drawing 2 the 3rd imaginary lines that extend at described width, the distance of leaving of 2 the 3rd imaginary lines is compared short with the distance of leaving of 2 described the second imaginary lines.
3. disposable diaper as claimed in claim 1 or 2, is characterized in that:
Described pars contractilis is arranged on the Breadth Maximum part of the length maximum of the described width in described drosal part, the more than 60% of length of the described length direction that leaves the Breadth Maximum part that distance is this drosal part of described foreign side's the first imaginary line and interior described side's the first imaginary line.
4. the disposable diaper as described in any one in claim 1～3, is characterized in that:
Non-skin opposite face in described veutro portion is provided with and can described in set, be with taking of grip part, and the length of this described length direction with grip part is this more than 70% of length of taking this length direction of band.
5. disposable diaper as claimed in claim 4, is characterized in that:
In the both sides alongst of described main body, a pair of three-dimensional gauffer and a pair of leg creases by respectively by gauffer form with elastomeric element on this length direction with elongation state configure form,
At least one party's of described three-dimensional gauffer and described leg creases described gauffer formation elastomeric element, in the time overlooking described main body, described in it, an end of length direction and described pars contractilis are overlapping, the other end with described in taking be with overlapping.
CN201280060684.3A 2011-12-20 2012-12-17 Disposable diaper Active CN103987352B (en)

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CN103987352B (en) 2016-08-24
JP2013146548A (en) 2013-08-01
RU2014128349A (en) 2016-02-20
RU2613870C2 (en) 2017-03-21

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