CN103987352B - Disposable diaper - Google Patents

Abstract

At drosal part (A), it is included between positive dough sheet (2) and back sheet (3) pars contractilis (8) of elastomeric element (81) of multiple identical fiber number (below fiber number 450dtex) with elongation state configuration, it is formed with bottom pars contractilis (8A1) at absorber configuring area (A1), is formed with top pars contractilis (8A2) at the non-configuring area of absorber (A2).The elastomeric element (81) of bottom pars contractilis (8A1) has non-telescoping portion (82) in the part overlapping with absorber (4).Top pars contractilis (8A2) is less than bottom pars contractilis (8A1) contractility.The upper end (60p) of band base portion (60), bottom (60q) lay respectively at corresponding foreign side or interior side the first imaginary line (V1p), the vicinity of (V1q), and the major part of band base portion (60) is present in the region clipped by two imaginary lines (V1p), (V1q).The major part of band grip part (61) is present in the region clipped by 2 the second imaginary lines (V2), (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 includes positive dough sheet, back sheet and the absorber being present between two sheets, there is veutro portion, crotch and drosal part in the longitudinal direction, the edge, the left and right sides of this drosal part is provided with a pair pull stap, and the set portion of this pull stap is bonded to take in portion what the non-skin opposite face of this main body was arranged, is through with wearer.

Disposable diaper about deploying type, patent document 1 is recorded in the waist of rear body (drosal part) and/or waist portion, be configured with the improving technology of the disposable diaper of the deploying type of multiple elastomeric element along horizontal direction (body width direction).Technology described in patent document 1, the configuring area of multiple above-mentioned elastomeric elements is divided into the central portion region part of the telescopic direction of this elastomeric element and is positioned at the end regions part of its both sides, this central portion region part by from outside it can be seen that in the way of configure design content, and in this end regions part, by from outside it can be seen that in the way of configure other design content different from the design content of this central portion region part, more particularly, the retracted position of this elastomeric element in this end regions part is the most more emphasized compared with the retracted position of this elastomeric element in this central portion region part, the most visually emphasize retractility and the telescopic extensions of this elastomeric element, to the waist of drosal part and/or the retractility in waist portion and conformability, give the impression of the excellent sense of more than wearer's practical extent.

Prior art literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2008-183332 publication

Summary of the invention

The problem that invention is to be solved

In disposable diaper described in patent document 1, the allocation position of pull stap is inappropriate with the relation arranging region of multiple above-mentioned elastomeric elements, therefore, when wearing, the waist of the drosal part length direction end of the drosal part side in main body (and near) is easily rolled to the direction of the skin leaving wearer, and the conformability in waist week is bad.Additionally, when there is when rolling of such waist week, this turnup branch hooking clothes on diaper, thus, diaper likely offsets and drops.In fact, the disposable diaper described in patent document 1, regardless of have waist week roll problem, all easily drop in dress, waist week conformability with prevent the aspect dropped from also having room for improvement.

The present invention provides a kind of disposable diaper, it has main body, this main body includes positive dough sheet, back sheet and the absorber between two sheets, there is drosal part, crotch and veutro portion in the longitudinal direction, the edge, the left and right sides of this drosal part is provided with a pair pull stap, and above-mentioned drosal part has at above-mentioned length direction: there is the absorber configuring area of the extension from above-mentioned crotch of above-mentioned absorber；nullThere is not the non-configuring area of absorber of this extension，At above-mentioned drosal part，It is included between above-mentioned positive dough sheet and above-mentioned back sheet the pars contractilis of elastomeric element of multiple identical fiber number with elongation state configuration，It is 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，It is formed with top pars contractilis at the non-configuring area of this absorber，It is each configured with this elastomeric element multiple at this bottom pars contractilis and this top pars contractilis，Constitute the multiple above-mentioned elastomeric element of above-mentioned pars contractilis，Fiber number is at below 450dtex，The telescopic direction of this elastomeric element is consistent with the width of the aforementioned body being orthogonal to above-mentioned length direction，Interval configuration on this length direction，Above-mentioned elastomeric element in the configuration of above-mentioned bottom pars contractilis，Cross this absorber in a side side of the foreign side from the above-mentioned width of above-mentioned absorber and extend to the opposing party side and the part overlapping with this absorber，There is the non-telescoping portion manifested of the retractility inhibiting 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 includes: the band base portion engaged with aforementioned body；nullAnd the band grip part being connected with this band base portion and extending to the width foreign side of this main body，This band grip part length on above-mentioned length direction compared with this band base portion is shorter，With constitute above-mentioned pars contractilis multiple above-mentioned elastomeric element in、It is positioned at the elastomeric element of foreign side of above-mentioned length direction as one man，Draw at the first imaginary line of foreign side that above-mentioned width extends，And as one man draw when side's the first imaginary line that this width extends with the most square elastomeric element being positioned at this length direction，The upper end of the outward side being positioned at above-mentioned length direction of above-mentioned band base portion，It is positioned at the vicinity of above-mentioned foreign side the first imaginary line and is positioned at compared with above-mentioned foreign side the first imaginary line more by the square position of this length direction，Or it is positioned at the position of the foreign side more leaning on this length direction compared with this foreign side's the first imaginary line，In addition，It is positioned at the bottom of the above-mentioned band base portion of the side contrary with above-mentioned upper end，It is positioned at the vicinity of above-mentioned side the first imaginary line and is positioned at the position of the foreign side more leaning on this length direction compared with above-mentioned side the first imaginary line，Or it is positioned at compared with this side's the first imaginary line more by the square position of this length direction，And the major part of above-mentioned band base portion is present in the region clipped by above-mentioned foreign side the first imaginary line and above-mentioned interior side the first imaginary line，With in the multiple above-mentioned elastomeric element that above-mentioned bottom pars contractilis configures、The foreign side and the most square elastomeric element that are positioned at above-mentioned length direction are distinguished the most as one man，Draw when 2 the second imaginary lines that above-mentioned width extends，The major part of above-mentioned band grip part is present in the region clipped by 2 these the second imaginary lines.

Invention effect

The disposable diaper of the present invention, the conformability in waist week is excellent, is not easy skew and drops when wearing.

Accompanying drawing explanation

Fig. 1 is the figure of an embodiment of the disposable diaper schematically showing the present invention, is that the elastomeric element representing and making each several part extends and expands to the part incision plane of the skin opposite face side (positive dough sheet side) of plane deployed condition.

Fig. 2 is the schematic section in the I-I cross section (cross section of width) representing Fig. 1.

Fig. 3 is the schematic section in the II-II cross section (cross section of width) representing Fig. 1.

Fig. 4 is the figure of the structure of the pars contractilis in the disposable diaper shown in explanatory diagram 1.

Detailed description of the invention

The present invention relates to the conformability excellence in a kind of waist week, dress are difficult to offset the disposable diaper dropped.

Hereinafter, the disposable diaper to the present invention, it is described with reference to the accompanying drawings 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 includes positive dough sheet 2, back sheet 3 and the absorber 4 between two sheets 2,3, there is drosal part A, crotch B and veutro portion C in the longitudinal direction, the edge, the left and right sides of drosal part A is provided with a pair pull stap 6,6, is so-called flat type disposable diaper.

Further illustrating, main body 10 includes: form the positive dough sheet 2 of the liquid permeability of skin opposite face；Form opaque liquid or the back sheet 3 of water-repellancy (following, they are referred to as opaque liquid) of non-skin opposite face；And between two sheets 2,3 absorber 4 of liquid retainability of configuration, be formed as elongate shape longer in a direction (X-direction in figure).Positive dough sheet 2, back sheet 3 and absorber 4 are respectively provided with elongate shape longer on a direction X.Positive dough sheet 2 and back sheet 3 are respectively provided with the size bigger than absorber 4, extend out outward from the periphery of absorber 4.Positive dough sheet 2, as in figure 2 it is shown, the size that the size of its width Y is than the width Y of back sheet 3 is little.

Drosal part A is arranged in the part of the dorsal part of wearer when being and wear, crotch B is arranged in the part of the crotch of wearer when being and wear, and veutro portion C is arranged in the part of the veutro of wearer when being and wear.Each field when drosal part A, crotch B and veutro portion C are respectively equivalent to main body 10 substantially trisection on length direction X under the deployed condition of the main body 10 (diaper 1) shown in Fig. 1.With the excretory portion counterpart of the excretory portion of wearer relative configuration when crotch B includes wearing, it is positioned at the central portion of the length direction X of main body 10 (diaper 1).Main body 10 (diaper 1), as it is shown in figure 1, the both side edges along the length direction X of crotch B is bent into inside arc-shaped, in the plane shown in Fig. 1, the hourglass-shaped shape of square shrinking in there is the mediad of length direction X.

In this specification, length direction (X-direction in figure) is that width (Y-direction in figure) is the direction orthogonal with this length direction along disposable diaper or the direction on the long limit of its component parts (absorber 4, main body 10 etc.).In addition, skin opposite face is the face of skin side towards wearer when wearing of the disposable diaper in disposable diaper or its component parts, and non-skin opposite face is the face towards the side (wear the clothes side) contrary with skin side when wearing of the disposable diaper in disposable diaper or its component parts.

Absorber 4 has rectangular shape when overlooking, the length direction X making its length direction and main body 10 is as one man arranged in the central portion of the width Y of main body 10, as it is shown in figure 1, the total length of the length direction X throughout crotch B, and extend respectively into drosal part A and veutro portion C.Drosal part A has the absorber configuring area A1 existing for the extension 41 from crotch B of absorber 4 on length direction X and there is not the absorber non-configuring area A2 of extension 41.Absorber non-configuring area A2 is length direction one end 10a of the drosal part A side being positioned at main body 10 and region between 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 three-dimensional gauffer and a pair leg creases, by being formed so that elongation state is respectively configured gauffer formation elastomeric element on length direction X.I.e., both sides at the length direction X along main body 10, it is each configured with being fixed with the side seal portion 5 of the three-dimensional gauffer formation elastomeric element 51 of one or more of wire (present embodiment is 2) at a side edge part with elongation state, when wearing, at least form a pair three-dimensional gauffer in crotch B.In addition, before side seal portion 5 in the leg of the left and right configured in the leg week of wearer and back sheet 3, one or more (present embodiment are 2) leg creases formation elastomeric element 52 alongst X of wire fixes with elongation state, when wearing, at described leg, by the contraction of this elastomeric element 52, form a pair leg creases.A pair side seal portion 5,5, positive dough sheet 2, absorber 4, gauffer formation elastomeric element 51,52 and back sheet 3, engaged by the known joint method of hot melt adhesive etc..

In the edge, the left and right sides of alongst X of the drosal part A of main body 10, it is provided with a pair pull stap 6,6.Pull stap 6, as shown in figures 1 and 3, including: the band base portion 60 engaged with main body 10 (sheet material 80 of pars contractilis 8 described later)；The band grip part 61 that the foreign side of the width Y to main body 10 being connected with band base portion 60 extends out.Skin opposite face in band grip part 61 is provided with the set portion 61a that the sunny side parts of mechanicalness face fastening are formed.As it is shown in figure 1, band grip part 61 is compared with band base portion 60, the length of length direction X is shorter.The maximum length of band base portion 60 and band grip part 61 respective length direction X is meaned in this " length of length direction ".

Additionally, be provided with taking of (set portion 61a) of set band grip part 61 at the non-skin opposite face of the veutro portion C of main body 10 to carry 7.Take and carry 7 by by known joint method (such as, bonding agent or heat-sealing etc.) back parts that fastened in mechanicalness face engage and are fixed on and are formed on the non-skin opposite face of back sheet 3, it is possible to freely fix the band grip part 61 carrying out set pull stap 6 of disengaging.

Shown in as shown in Figure 1, Figure 3 and Figure 4, at drosal part A, the pars contractilis 8 being included between positive dough sheet 2 and back sheet 3 elastomeric element 81 of multiple identical fiber number with elongation state configuration and constituted, arrange at absorber configuring area A1 and absorber non-configuring area A2, pars contractilis 8 is formed with bottom pars contractilis 8A1 in absorber configuring area A1, is formed with top pars contractilis 8A2 in absorber non-configuring area A2.Bottom pars contractilis 8A1 and top pars contractilis 8A2 is respectively arranged with multiple elastomeric element 81.Multiple elastomeric elements 81 interval in the way of its telescopic direction is consistent with the width Y of main body 10 is arranged on the length direction X of main body 10.As shown in Figure 1 and Figure 4, in present embodiment, Breadth Maximum part A3 that the length of the width Y that pars contractilis 8 is arranged in drosal part A is maximum.Breadth Maximum part A3 of the drosal part A in present embodiment, as shown in Figure 1 and Figure 4, is to be the region of rectangular shape during the vertical view of length direction one end 10a of the drosal part A side including main body 10.

Constituting multiple elastomeric elements 81 of pars contractilis 8, fiber number (rugosity) is below 450dtex, preferably more than 150dtex below 450dtex, more preferably more than 300dtex below 400dtex.The thinner parts of such rugosity are used, it is possible to make diaper 1 the most excessively tie tight but fit in the waist of wearer, it is possible to suppression constitutes the vestige of the elastomeric element of pars contractilis as elastomeric element 81.In present embodiment, it is identical that multiple elastomeric elements 81 are not only fiber number, and length (length of telescopic direction) is the most identical.The fiber number of multiple elastomeric elements 81 is the most identical, compared with mutually mutually different situation, favourable at the aspect of manufacturing cost, processability.

In present embodiment, pars contractilis 8, in addition to multiple elastomeric elements 81, is additionally included between positive dough sheet 2 and back sheet 3 sheet material 80 of configuration, and multiple elastomeric elements 81 are fixed on sheet material 80 with elongation state.More particularly, pars contractilis 8 in present embodiment includes 2 sheet materials 80,80 of same shape (rectangular shape) and same size, and multiple elastomeric elements 81 are clamped and fixed in elongation state by the known joint method of hot melt adhesive etc. between two sheet materials 80,80 of coincidence.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 it is shown on figure 3, be engaged in band base portion 60, a pair pull stap 6,6 and the integration of therebetween pars contractilis 8 by known joint method.Thus, when gripping a pair respective band grip part 61 of pull stap 6,6 with finger etc., when the foreign side of width Y stretches, with it in linkage, pars contractilis 8 extends on width Y.Constitute 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.

Shown in as shown in Figure 1, Figure 3 and Figure 4, at the elastomeric element 81 that bottom pars contractilis 8A1 (part being positioned at absorber configuring area A1 in pars contractilis 8) configures, cross absorber 4 from a side side of the foreign side of the width Y of absorber 4 and extend to the opposing party side, and with the part (part relative with the non-skin opposite face of absorber 4) that absorber 4 overlaps, there is the non-telescoping portion 82 inhibiting the retractility of this elastomeric element 81 to manifest.In elastomeric element 81 the manifesting by part suppression retractility that bottom pars contractilis 8A1 (absorber configuring area A1) configures, do not stretch in non-telescoping portion 82, but the other parts beyond it (being positioned at the part of the foreign side of the width Y of absorber 4) are stretched.In addition, in the elastomeric element 81 being configured at bottom pars contractilis 8A1 (absorber configuring area A1), other parts beyond non-telescoping portion 82, i.e. clipping non-telescoping portion 82 and be positioned at a side side and the part of the opposing party side of width Y, the end of the inward side of respective width Y is overlapping with absorber 4 (with reference to Fig. 3 and Fig. 4).

On the other hand, at the elastomeric element 81 that top pars contractilis 8A2 (part being positioned at absorber non-configuring area A2 in pars contractilis 8) configures, as shown in Figure 1 and Figure 4, extend continuously, in its whole show retractility inherently from the lateral other end side, one end of the width Y of drosal part A (Breadth Maximum part A3).

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, in the way of not flexible, at least some of (central portion of the width Y of this part) of the part overlapping with absorber 4 is fixed on two sheet materials 80,80, and thus this part becomes non-telescoping portion 82.As the method (forming method in non-telescoping portion 82) making elastomeric element 81 not manifest retractility, without commonly used approach in this disposable diaper of the use being particularly limited to, such as, elastomeric element 81 is compactly cut off its method do not stretched that makes, or by the method etc. using the joint of bonding agent etc. to make elastomeric element 81 not stretch.

So, in the part that elastomeric element 81 is overlapping with absorber 4, there is non-telescoping portion 82, it is possible to not configure along the buttocks of wearer with not producing longitudinal gauffer the end of the length direction X of absorber 4 at absorber 4, it is possible to prevent leakage, and prevent from abutting skin at the top of the gauffer of absorber 4 generation and resulting in the problems such as vestige.From the viewpoint of reaching such action effect more reliably, the ratio (length W6/ length W5) of length W6 (with reference to Fig. 4) of the width Y in non-telescoping portion 82 length W5 (with reference to Fig. 4) relative to the width Y of absorber 4 is preferably less than more than 70% 95%, more preferably less than more than 80% 90%.Length (width) W5 of absorber 4 and length (width) W6 in non-telescoping portion 82, represents the length of the width Y of the length the best part of width Y in this part respectively.

In addition, less than the width W5 of absorber 4 by the width W6 that makes non-telescoping portion 82 like this, the sidepiece of the alongst X of absorber 4 is fixed in the end of the inward side of the width Y of the other parts beyond the non-telescoping portion 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.Then, when dressing diaper 1, generally, when overlapping the taking of extension 41 that the band grip part 61 of the pull stap 6 of drosal part A anchors at the absorber 4 with veutro portion C carries on 7, form pars contractilis 8 and pull stap 6 (there is the drosal part A of retractility) in the waist portion of wearer and take the installation portion with the 7 waistband shapes constituted, effect by such waistband shape installation portion, before and after the length direction X of absorber 4, end is reliably fixed on the health of wearer, even absorber 4 absorbing and excreting thing in wearing process and in the case of adding weight, it also is able to reach diaper 1 be difficult to offset the effect dropped.

The contractility of pars contractilis 8 (bottom pars contractilis 8A1, top pars contractilis 8A2), based on the action effect reaching above-mentioned waistband shape installation portion more reliably, (supporting absorber 4 absorbs weight during excreta, diaper 1 will not be offset drop) viewpoint determine, for being positioned at the top pars contractilis 8A2 of absorber non-configuring area A2, compared to paying attention to preventing the contractility of strength that the skew of diaper 1 drops, there is flexibly the fit contractility of degree of health of the end of the length direction X making diaper 1 even more important.From such a viewpoint, in present embodiment, top pars contractilis 8A2 is less than the bottom pars contractilis 8A1 contractility being positioned at absorber configuring area A1, thus, when diaper 1 is worn, absorber 4 can be securely fixed on health, and flexibly fits health in the end of the length direction X of diaper 1, thereby, it is possible to prevent the leakage from this end.

The contractility of bottom pars contractilis 8A1 is preferably more than 1.0N below 6.0N, more preferably more than 1.5N below 4.0N, and the contractility of top pars contractilis 8A2 is preferably more than 0.5N below 3.0N, more preferably more than 0.8N below 2.5N.The ratio (pars contractilis 8A1/ top, bottom pars contractilis 8A2) of the contractility of bottom pars contractilis 8A1 and the contractility of top pars contractilis 8A2 is preferably less than more than 1.2 5.0, more preferably less than more than 1.5 3.0.The contractility of each several part of pars contractilis 8 measures as follows.

<contractility assay method>

Cut out from diaper and measure object part (part suitable with top pars contractilis 8A2 and bottom pars contractilis 8A1 (with reference to Fig. 4)) as measuring sample.Tensilon cupping machine (model RTA-100 is used during mensuration, rientech company of Co., Ltd. O manufactures), distance between Initial grip is the length that the natural length (length of the nature not making elastomeric element extend) from the diaper width direction measuring object part (drosal part A) deducts 50mm, by the part of in the edge, the left and right sides along diaper length direction measuring sample, to be positioned at the position being configured with waist elastic members (elastomeric element 81) left and right sides, it is sandwiched in fixture respectively.So, the mensuration sample that the two ends making diaper width direction are clipped in fixture, under conditions of crosshead (crosshead) translational speed is 300mm/min, the natural length (positive dough sheet 2 or the natural length of back sheet 3) being stretched to the width from diaper deducts the length of 20mm, using tensile load now as the contractility of this mensuration sample.

As mentioned above, as the method making the magnitude relationship of top pars contractilis 8A2 <bottom pars contractilis 8A1 set up in terms of contractility, such as, 1) make the percentage elongation of elastomeric element 81 in top pars contractilis 8A2 configuration less than the method (method being fixed with the state more extended than the elastomeric element 81 configured at top pars contractilis 8A2 by the elastomeric element 81 configured at bottom pars contractilis 8A1) of percentage elongation of the elastomeric element 81 in bottom pars contractilis 8A1 configuration；2) making the method etc. that the quantity of the quantity of elastomeric element 81 of the top pars contractilis 8A2 elastomeric element 81 than bottom pars contractilis 8A1 is few, these methods can individually use, it is also possible to is combined as using.Additionally, the elastomeric element 81 configured at pars contractilis 8 (bottom pars contractilis 8A1, top pars contractilis 8A2), be preferably in more than 20% by its percentage elongation, be especially in the scope of less than more than 30% 120% in the way of configure.Herein, percentage elongation refers to the ratio of the length of the part of the elongation increase relative to natural length, and such as, the elastomeric element elongation of natural length 10cm is in the case of 20cm, and its percentage elongation is 100 [={ 10/ (20-10) } × 100] %.Additionally, in present embodiment, as it was previously stated, the mutual fiber number of multiple elastomeric elements 81 in pars contractilis 8 configuration must be identical, it is unable to use the method at the different elastomeric element of bottom pars contractilis 8A1 and top pars contractilis 8A2 use fiber number.

nullAs shown in Figure 4，With constitute pars contractilis 8 multiple elastomeric elements 81 in、The elastomeric element 81 of the foreign side being positioned at length direction X as one man draws the first imaginary line V1p of foreign side extended on width Y，And as one man draw, with the most square elastomeric element 81 being positioned at length direction X, the first imaginary line V1q of side extended on width Y，Now，I) the upper end 60p of the outward side of the length direction X of band base portion 60 it is positioned at，It is positioned at the vicinity of foreign side's the first imaginary line V1p and is positioned at the side (lower section in Fig. 4) of length direction X compared with this foreign side's the first imaginary line V1p，Or it is positioned at the foreign side (top in Fig. 4) of length direction X compared with foreign side's the first imaginary line V1p，In addition，Ii) the bottom 60q (being positioned at the end of the inward side of the length direction X of band base portion 60) of the band base portion 60 of the side contrary with upper end 60p it is positioned at，It is positioned at the vicinity of side's the first imaginary line V1q and is positioned at the foreign side (top in Fig. 4) of length direction X compared with this side's the first imaginary line V1q，Or it is positioned at the side (lower section in Fig. 4) of length direction X compared with interior side the first imaginary line V1q.Thus, length W1 of the length direction X with base portion 60 is (i.e., upper end 60p leaves distance with bottom 60q's) with foreign side's the first imaginary line V1p and interior side the first imaginary line V1q to leave distance L1 roughly the same or longer than leaving distance L1.Here, length W1 of band base portion 60 means the length of the length direction X of the length the best part of the length direction X in band base portion 60.In addition, " length W1 is with to leave distance L1 roughly the same; or longer than leaving distance L1 " refer to that the ratio (length W1/ leaves distance L1) relative to length W1 leaving distance L1 is in the scope of less than more than 70% 110%, this ratio is preferably less than more than 75% 100%, more preferably less than more than 80% 100%.

So, upper and lower end parts 60p with base portion 60,60q lay respectively at the vicinity of first imaginary line V1p, V1q of correspondence, the overall convergent force of the multiple elastomeric elements 81 thus constituting pars contractilis 8 (bottom pars contractilis 8A1, top pars contractilis 8A2) can connect base portion 60, thus, the action effect (action effect of above-mentioned waistband shape installation portion) of pars contractilis 8 can further serve as effect.In other words, from the viewpoint of the action effect of pars contractilis 8, upper and lower end parts 60p with base portion 60,60q substantially exist in the scope existing for multiple elastomeric elements 81 of composition pars contractilis 8, upper and lower end parts 60p, 60q in the range of the contractility not hindering elastomeric element 81, can also be present in the foreign side in the region clipped by 2 first imaginary lines V1p, V1q.

Additionally, in present embodiment, except above-mentioned i) and ii), also there is following characteristics iii) major part of band base portion 60, be present in the region clipped by foreign side the first imaginary line V1p and interior side the first imaginary line V1q.The band base portion central area of more than half of the center referring to the length direction X of band base portion 60 in this " major part of band base portion " and the whole area accounting for band base portion 60.Major part with base portion 60 is present in the region clipped by 2 first imaginary lines V1p, V1q, thus, for band base portion 60, the convergent force response of the multiple elastomeric elements 81 constituting pars contractilis 8 is good, and the action effect (action effect of above-mentioned waistband shape installation portion) of pars contractilis 8 is further embodied.

In addition, in present embodiment, as shown in Figure 4, iv) and in multiple elastomeric elements 81 of bottom pars contractilis 8A1 configuration, to be positioned at length direction X foreign sides and the most square elastomeric element 81,81 are the most as one man, draw 2 second imaginary lines V2, the V2 extended on width Y, now, the major part of band grip part 61 is present in the region clipped by 2 second imaginary lines V2, V2.The most square straight line being positioned at length direction X in 2 second imaginary lines V2, V2 is identical with side's the first imaginary line V1q.The central area, band grip part of more than half of the center referring to the length direction X of band grip part 61 in this " major part of band grip part " and the whole area accounting for band grip part 61.Major part with grip part 61 is present in the region clipped by 2 second imaginary lines V2, V2, thus, for band grip part 61, the convergent force of the multiple elastomeric elements 81 constituting bottom pars contractilis 8A1 can transmit selectively, it is possible to further embodies the action effect (action effect of above-mentioned waistband shape installation portion) of pars contractilis 8.

nullThe diaper 1 of present embodiment，Have above-mentioned i)～iv) feature，When thus wearing，7 can be carried by band base portion 60 globality to link with taking of veutro portion C the convergent force of the multiple elastomeric elements 81 constituting pars contractilis 8 in drosal part A，And，By band grip part 61，The convergent force emphasis of the elastomeric element 81 configured at bottom pars contractilis 8A1 is linked to overlapping the taking of extension 41 with absorber 4 of veutro portion C carries 7，Thus，End and bottom pars contractilis 8A1 (sheet material 80) before and after the length direction X of absorber 4、Band base portion 60、Band grip part 61 carries together with 7 with taking，It is mounted to surround the waistband shape in the waist portion of wearer，Become a component parts of above-mentioned waistband shape installation portion，Therefore it is securely fixed on health，Even if absorber 4 absorbing and excreting thing in Chuan Zhe and in the case of adding weight，It also is able to reach diaper 1 be difficult to offset the effect dropped.In addition, especially by having above-mentioned iv) feature, major part with grip part 61, not actually exist at the above-mentioned pars contractilis 8A2 of the foreign side being positioned at the region clipped by 2 second imaginary lines V2, V2, therefore, in the pars contractilis 8A2 of top, the contractility discharged from bottom pars contractilis 8A1 flexibly plays a role, soft being fitted on health in the end of the length direction X of diaper 1, it is possible to effectively prevent from this end leakage.Generally speaking, in the dress of diaper 1, can effectively prevent the skew of diaper 1 from dropping, and the problem that waist length direction one end 10a of the drosal part A side of main body 10 (and near) being not likely to produce drosal part A is rolled to the direction of the skin leaving wearer, improves the conformability in waist week.

In the present invention, above-mentioned three-dimensional gauffer and/or above-mentioned leg creases is fed through to from the action effect making above-mentioned waistband shape installation portion, from the viewpoint of improving conformability and the anti-leakage of two gauffers further, the gauffer formation elastomeric element of at least one party of preferably two gauffers, as shown in Figure 1, in the top view of main body 10 (diaper 1), the one end of its length direction X is overlapping with pars contractilis 8, the other end with take carry 7 overlapping.In present embodiment, as it is shown in figure 1, three-dimensional gauffer formation elastomeric element 51 and pars contractilis 8 and taking carries 7 overlapping, on the other hand, leg creases formation elastomeric element 52 does not carry 7 overlapping with pars contractilis 8 and taking, but, this elastomeric element 52 can also carry 7 overlapping with pars contractilis 8 and taking.With pars contractilis 8 and take with 7 overlapping three-dimensional gauffer formation elastomeric elements 51, generally as it is shown on figure 3, via side seal portion 5 sheet material such as grade, indirectly with this pars contractilis 8 and take and carry 7 to link.Additionally, with pars contractilis 8 and take with 7 overlapping leg creases formation elastomeric elements 52, generally via back sheet 3 sheet material such as grade, indirectly with this pars contractilis 8 and this take and carry 7 to link.

So, three-dimensional gauffer is formed with elastomeric element 51, carry 7 (veutro portion C) the most overlapping (link indirectly) in a top view with the pars contractilis 8 (drosal part A) and taking constituting above-mentioned waistband shape installation portion, thus, above-mentioned three-dimensional gauffer links with this waistband shape installation portion, action effect (making absorber 4 be fixed on the health of wearer) chain effect with this waistband shape installation portion, it is easier to make this solid gauffer laminating health, thus, the action effect (preventing leakage) that this solid gauffer brings further is embodied.In addition, leg creases formation elastomeric element 52 and pars contractilis 8 and in the case of taking and carrying 7 the most overlapping (links indirectly), above-mentioned leg creases links with above-mentioned waistband shape installation portion, the chain effect of action effect with this waistband shape installation portion, it is easier to make this leg creases laminating health, thus, the action effect (preventing leakage) that this leg creases is brought further is embodied.So, absorber 4 is fixed on health when wearing based on above-mentioned waistband shape installation portion, and make above-mentioned three-dimensional gauffer, the above-mentioned leg creases existed independent of absorber 4 (separating with absorber 4), arrange along this health based on this waistband shape installation portion, it is possible to become the state being less susceptible to produce leakage problem.

In addition, in present embodiment, as shown in Figure 4, with in multiple elastomeric elements 81 that top pars contractilis 8A2 configures, be positioned at the foreign side of length direction X and the most square elastomeric element 81,81 the most as one man, draw 2 the 3rd imaginary lines V3, the V3 extended on width Y, now, distance L2 of leaving leaving distance L3 and 2 second imaginary lines V2, V2 of 2 the 3rd imaginary lines V3, V3 is compared shorter.2 the 3rd imaginary lines V3, V3 are positioned at the straight line of the foreign side of length direction X, identical with foreign side's the first imaginary line V1p.So, leave distance L3 and < leave distance L2, thereby, it is possible to more reliable embodiment above-mentioned action effect the conformability of the waist week (and prevent from offseting the raising of the performance that drops).Leave distance L2 and leave the ratio (L2/L3) preferably less than more than 45% 75% of distance L3, more preferably less than more than 50% 65%.

Additionally, length W2 (with reference to Fig. 4) of the length direction X of band grip part 61 preferably takes more than the 70% of length W3 (with reference to Fig. 1) of the length direction X with 7, particularly preferably less than more than 80% 100%.When length W2 of band grip part 61 is take length W3 with 7 more than 70%, enable to band grip part 61 is anchored at take carry on 7 time, the folding wrinkle that the periphery of this band grip part 61 in this is taken with 7 produces is less, thus, the end conformability to health before and after the length direction X of absorber 4 is improved further.Length W2 with grip part 61, it is meant that the length of the length direction X of the length the best part of the length direction X in band grip part 61.In present embodiment, length W2 of band grip part 61, as shown in Figure 1 and Figure 4, along with the foreign side to width Y goes to reduce successively, therefore length W2 of a length of band grip part 61 of the length direction X of the part by band base portion 60 in band grip part 61.Additionally, take length W3 with 7, it is meant that take the length of the length direction X of length the best part with the length direction X in 7.

In addition, as previously mentioned, pars contractilis 8 is arranged on Breadth Maximum part A3 of drosal part A, foreign side's the first imaginary line V1p and interior side the first imaginary line V1q leave distance L1 be preferably up to width segments A3 length direction X length W4 (reference Fig. 4) more than 60%, particularly preferably less than more than 70% 100%.Length W4 leaving Breadth Maximum part A3 that distance L1 is drosal part A of 2 first imaginary lines V1p, V1q more than 60% time, the conformability in waist week can be improved further and prevent from offseting the performance dropped, and, flank (being positioned at the part of the foreign side of the width Y of the absorber 4) laminating of drosal part A is from the buttocks of the wearer position to leg, the flank of coupled crotch B draws high above the waist of wearer, can improve the conformability in leg week, result can effectively prevent leakage.

From the viewpoint of improving further the above-mentioned action effect conformability of the waist week (and prevent from offseting the performance dropped), the size etc. of each several part of diaper 1 is preferably as follows setting.

Foreign side's the first imaginary line V1p and interior side the first imaginary line V1q leaves distance L1 (with reference to Fig. 4), pars contractilis 8 i.e. substantially has the length of the length direction X of the continuous print stretching region of retractility, it is preferably more than 50mm below 100mm, more preferably more than 60mm below 90mm.

2 second imaginary lines V2, V2 leave distance L2 (with reference to Fig. 4), i.e. bottom pars contractilis 8A1 (being positioned at the part of absorber configuring area A1 in pars contractilis 8) substantially has the length of the length direction X of the part of retractility, it is preferably more than 20mm below 60mm, more preferably more than 30mm below 40mm.

2 the 3rd imaginary lines V3, V3 leave distance L3 (with reference to Fig. 4), i.e. top pars contractilis 8A2 (being positioned at the part of absorber non-configuring area A2 in pars contractilis 8) substantially has the length of the length direction X of the part of retractility, it is preferably more than 10mm below 40mm, more preferably below 20mm below 30mm.

Length W1 (with reference to Fig. 4) of the length direction X with base portion 60 is preferably more than 50mm below 100mm, more preferably more than 60mm below 90mm,

Length W2 (with reference to Fig. 4) of the length direction X with grip part 61 is preferably more than 20mm below 60mm, more preferably more than 30mm below 40mm.

Length W3 (with reference to Fig. 1) taking the length direction X with 7 is preferably more than 30mm below 80mm, more preferably more than 40mm below 60mm.

Length W4 (with reference to Fig. 4) of the length direction X of Breadth Maximum part A3 of drosal part A is preferably more than 60mm below 120mm, more preferably more than 70mm below 100mm.

Length W5 (with reference to Fig. 4) of the width Y of absorber 4 is preferably more than 80mm below 140mm, more preferably more than 90mm below 120mm.

Length W6 (with reference to Fig. 4) of the width Y in non-telescoping portion 82 is preferably more than 70mm below 120mm, more preferably more than 90mm below 110mm.

Additionally, the ratio (length W2/ leaves distance L2) leaving distance L2 that length W2 of the length direction X of band grip part 61 is relative to 2 second imaginary lines V2, V2 is preferably less than more than 70% 100%, more preferably less than more than 80% 100%.

In addition, the ratio (length W2/ length W1) of length W2 of the length direction X with grip part 61 length W1 (i.e. upper end 60p and bottom 60q leaves distance) relative to the length direction X of band base portion 60 is preferably less than more than 40% 70%, more preferably less than more than 50% 60%.

The interval T1 (with reference to Fig. 4) of 2 elastomeric elements 81,81 adjacent on length direction X is preferably more than 3mm below 8mm, more preferably more than 4mm below 6mm.In pars contractilis 8 (bottom pars contractilis 8A1, top pars contractilis 8A2), multiple interval T1 can be the most identical, it is also possible to mutually different.

The quantity of the elastomeric element 81 constituting pars contractilis 8 is preferably more than 8 less than 30, more preferably more than 10 less than 20, quantity at the elastomeric element 81 of bottom pars contractilis 8A1 configuration is preferably more than 5 less than 20, more preferably more than 10 less than 15, quantity at the elastomeric element 81 of top pars contractilis 8A2 configuration is preferably more than 3 less than 10, more preferably more than 4 less than 8.

The formation material of each several part beyond dough sheet 2 positive in diaper 1 is illustrated, as positive dough sheet 2, back sheet 3, absorber 4 and side seal portion 5, is able to use the various materials always used in this technical field.As positive dough sheet 2, it is possible to use the sheet with liquid permeability, such as can use non-woven fabrics or apertured film etc..As back sheet 3, it is possible to use opaque liquid and there is the sheet of poisture-penetrability, there is the minute aperture of the most through for instance, it is possible to use thus there are the non-woven fabrics such as the resin molding of poisture-penetrability, drying non-woven fabrics, they laminated body etc. with other sheet.As absorber 4, such as can use the absorbent core of the liquid retainability including the variously-shaped water absorbent polymers such as the fibrous material of paper pulp fiber etc., graininess, this absorbent core can also 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..Additionally, as side seal portion 5, it is possible to use non-woven fabrics or the sheet of resin molding of water-repellancy, it is possible to use the material identical with back sheet 3.

As the sheet material 80 of composition pars contractilis 8, for instance, it is possible to use spun-bonded/melt-blown/spunbond (SMS) etc. that polypropylene fibre is constituted.The grammes per square metre (mass area ratio) of sheet material 80 is preferably 8g/m²Above 20g/m²Hereinafter, more preferably 10g/m²Above 15g/m²Below.In addition, as the elastomeric element 81 constituting pars contractilis 8, the various wire or the elastomeric element of rope form always used in this technical field can be used, as its raw material, it is possible to enumerate styrenic rubbers, olefin rubber, polyurethanes rubber, polyethylene, styrene butadiene, silicone etc..

The diaper 1 of present embodiment, it is possible to use as the common flat type disposable diaper with pull stap.The diaper 1 of present embodiment, there is above-mentioned specific structure, the allocation position of pull stap 6 is suitable with the relation of pars contractilis 8, therefore, in dress, being not likely to produce the problem that waist length direction one end 10a of the drosal part A side of main body 10 (and near) of drosal part A is rolled to the direction of the skin leaving wearer, the stickiness in waist week is excellent, it is difficult to skew is dropped.

The invention is not restricted to above-mentioned embodiment, can change without departing from the spirit and scope of the invention.Such as, in above-mentioned embodiment, constitute 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 not also be overlapping, it is also possible to leaving, to the interior side of width Y, the end that the position of predetermined distance exists the width Y of elastomeric element 81 from band base portion 60.In other words, elastomeric element 81, its entirety can be only fitted in the region clipped by pair of right and left band base portion 60,60.

Additionally, pars contractilis 8 is at least included between positive dough sheet 2 and back sheet 3 elastomeric element 81 of the multiple identical fiber number with elongation state configuration and is constituted, it is also possible to do not include sheet material 80.In this case, in positive dough sheet 2 and back sheet 3 with 2 first imaginary lines V1p, V1q leave the part that distance L1 (with reference to Fig. 4) is corresponding, play a role as the continuous print stretching region substantially with retractility.Additionally, the number of sheet material 80 can also be 1.

For the embodiment of the invention described above, also disclose content below (disposable diaper).

<1>a kind of disposable diaper, it has main body, and this main body includes positive dough sheet, back sheet and the absorber between two sheets, has drosal part, crotch and veutro portion in the longitudinal direction, and the edge, the left and right sides of this drosal part is provided with a pair pull stap,

Above-mentioned drosal part has at above-mentioned length direction: there is the absorber configuring area of 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, it is included between above-mentioned positive dough sheet and above-mentioned back sheet the pars contractilis of elastomeric element of multiple identical fiber number with elongation state configuration, it is 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, it is formed with top pars contractilis at the non-configuring area of this absorber, it is each configured with this elastomeric element multiple at this bottom pars contractilis and this top pars contractilis

Constituting the multiple above-mentioned elastomeric element of above-mentioned pars contractilis, fiber number is at below 450dtex, and the telescopic direction of this elastomeric element is consistent with the width of the aforementioned body being orthogonal to above-mentioned length direction, interval configuration on this length direction,

Above-mentioned elastomeric element in the configuration of above-mentioned bottom pars contractilis, cross this absorber in a side side of the foreign side from the above-mentioned width of above-mentioned absorber and extend to the opposing party side and the part overlapping with this absorber, there is the non-telescoping portion manifested of the retractility inhibiting 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 includes: the band base portion engaged with aforementioned body；And the band grip part being connected with this band base portion and extending to the width foreign side of this main body, this band grip part length on above-mentioned length direction compared with this band base portion is shorter,

At the elastomeric element with in the multiple above-mentioned elastomeric element constituting above-mentioned pars contractilis, to be positioned at above-mentioned length direction foreign side as one man, draw at the first imaginary line of foreign side that above-mentioned width extends, and as one man draw when side's the first imaginary line that this width extends with the most square elastomeric element being positioned at this length direction

The upper end of the outward side being positioned at above-mentioned length direction of above-mentioned band base portion, it is positioned at the vicinity of above-mentioned foreign side the first imaginary line and is positioned at compared with above-mentioned foreign side the first imaginary line more by the square position of this length direction, or it is positioned at the position of the foreign side more leaning on this length direction compared with this foreign side's the first imaginary line

In addition, it is positioned at the bottom of the above-mentioned band base portion of the side contrary with above-mentioned upper end, it is positioned at the vicinity of above-mentioned side the first imaginary line and is positioned at the position of the foreign side more leaning on this length direction compared with above-mentioned side the first imaginary line, or it is positioned at more by the square position of this length direction compared with this side's the first imaginary line, and

The major part of above-mentioned band base portion is present in the region clipped by above-mentioned foreign side the first imaginary line and above-mentioned interior side the first imaginary line,

Distinguishing the most as one man with in the multiple above-mentioned elastomeric element that above-mentioned bottom pars contractilis configures, to be positioned at above-mentioned length direction foreign side and the most square elastomeric element, drawing when 2 the second imaginary lines that above-mentioned width extends, the major part of above-mentioned band grip part is present in the region clipped by 2 these the second imaginary lines.

<2>disposable diaper as described in above-mentioned<1>, wherein, distinguishing the most as one man with in the multiple above-mentioned elastomeric element that above-mentioned top pars contractilis configures, to be positioned at above-mentioned length direction foreign side and the most square elastomeric element, draw when 2 three imaginary lines that above-mentioned width extends, 2 the 3rd imaginary lines leave distance second imaginary line above-mentioned with 2 leave distance compared with shorter.

<3>disposable diaper as described in above-mentioned<1>or<2>, wherein, more than the 60% of the length of the above-mentioned length direction leaving the Breadth Maximum part that distance is this drosal part of the Breadth Maximum part that the length of the above-mentioned width that above-mentioned pars contractilis is arranged in above-mentioned drosal part is maximum, above-mentioned foreign side the first imaginary line and interior above-mentioned side's the first imaginary line.

<4>disposable diaper as according to any one of above-mentioned<1>～<3>, wherein, non-skin opposite face in above-mentioned veutro portion is provided with taking of set above-mentioned band grip part and carries, the above-mentioned length direction of this band grip part a length of this take band this length direction length more than 70%.

<5>disposable diaper as described in above-mentioned<4>, wherein, the length of the above-mentioned length direction of above-mentioned band grip part is preferably less than more than the 80% 100% of the length of the above-mentioned length direction taking band.

<6>disposable diaper as described in above-mentioned<4>or<5>, wherein, the length of the above-mentioned above-mentioned length direction taking band is preferably more than 30mm, more preferably more than 40mm, and preferably below 80mm, more preferably below 60mm.

<7>disposable diaper as according to any one of above-mentioned<4>～<6>, wherein, in the both sides alongst of aforementioned body, a pair three-dimensional gauffer and a pair leg creases are by being formed gauffer formation elastomeric element so that elongation state configures on this length direction respectively

Above-mentioned gauffer the is formationed elastomeric element of at least one party of above-mentioned three-dimensional gauffer and above-mentioned leg creases, when vertical view aforementioned body, the one end of its above-mentioned length direction is overlapping with above-mentioned pars contractilis, and the other end is with above-mentioned to take band overlapping.

<8>disposable diaper as according to any one of above-mentioned<1>～<7>, wherein, constitutes the fiber number of the multiple above-mentioned elastomeric element of above-mentioned pars contractilis, it is preferably more than 150dtex, more preferably more than 300dtex, and preferably below 450dtex, more preferably below 400dtex.

<9>disposable diaper as according to any one of above-mentioned<1>～<8>, wherein, above-mentioned pars contractilis, in addition to multiple above-mentioned elastomeric elements, being additionally included between above-mentioned positive dough sheet and above-mentioned back sheet 2 sheet materials of configuration, these elastomeric elements multiple are clamped between 2 these sheet materials with elongation state

Above-mentioned non-telescoping portion, when being clipped between 2 above-mentioned sheet materials by the elastomeric element of above-mentioned bottom pars contractilis, at least some of of part overlapping with above-mentioned absorber when by vertical view in this elastomeric element is formed to be fixed on two sheet materials by the way of flexible.

<10>disposable diaper as according to any one of above-mentioned<1>～<9>, wherein, the length of the above-mentioned width in above-mentioned non-telescoping portion is relative to the ratio of the length of the above-mentioned width of above-mentioned absorber, it is preferably more than 70%, more preferably more than 80%, and preferably less than 95%, more preferably less than 90%.

<11>disposable diaper as according to any one of above-mentioned<1>～<10>, wherein, the contractility of above-mentioned bottom pars contractilis is preferably more than 1.0N, more preferably more than 1.5N, and preferably below 6.0N, more preferably below 4.0N, the contractility of above-mentioned top pars contractilis is preferably more than 0.5N, more preferably more than 0.8N, and preferably below 3.0N, more preferably below 2.5N.

<12>disposable diaper as according to any one of above-mentioned<1>～<11>, wherein, the ratio (bottom pars contractilis/top pars contractilis) of the contractility of above-mentioned bottom pars contractilis and the contractility of above-mentioned top pars contractilis is preferably more than 1.2, more preferably more than 1.5, and preferably less than 5.0, more preferably less than 3.0.

<13>disposable diaper as according to any one of above-mentioned<1>～<12>, wherein, above-mentioned pars contractilis substantially has the length of the above-mentioned length direction of the continuous print stretching region of retractility, it is preferably more than 50mm, more preferably more than 60mm, and preferably below 100mm, more preferably below 90mm.

<14>disposable diaper as according to any one of above-mentioned<1>～<13>, wherein, the length of the above-mentioned length direction in the pars contractilis of above-mentioned bottom with retractility part is preferably more than 20mm, more preferably more than 30mm, it is preferably below 60mm, more preferably below 40mm.

<15>disposable diaper as according to any one of above-mentioned<1>～<14>, wherein, the length of the above-mentioned length direction of above-mentioned band base portion is preferably more than 50mm, more preferably more than 60mm, and preferably below 100mm, more preferably below 90mm.

<16>disposable diaper as according to any one of above-mentioned<1>～<15>, wherein, the length of the above-mentioned length direction of above-mentioned band grip part is preferably more than 20mm, more preferably more than 30mm, and preferably below 60mm, more preferably below 40mm.

<17>disposable diaper as according to any one of above-mentioned<1>～<16>, wherein, the length of the above-mentioned length direction of the Breadth Maximum part of above-mentioned drosal part is preferably more than 60mm, more preferably more than 70mm, and preferably below 120mm, more preferably below 100mm.

<18>disposable diaper as according to any one of above-mentioned<1>～<17>, wherein, the length of the above-mentioned width of above-mentioned absorber is preferably more than 80mm, more preferably more than 90mm, and preferably below 140mm, more preferably below 120mm.

<19>disposable diaper as according to any one of above-mentioned<1>～<18>, wherein, the length of the above-mentioned width in above-mentioned non-telescoping portion is preferably more than 70mm, more preferably more than 90mm, and preferably below 120mm, more preferably below 110mm.

<20>disposable diaper as according to any one of above-mentioned<1>～<19>, wherein, the length of the above-mentioned length direction of above-mentioned band grip part is relative to the ratio of the length of the above-mentioned length direction of above-mentioned band base portion, it is preferably more than 40%, more preferably more than 50%, and preferably less than 70%, more preferably less than 60%.

<21>disposable diaper as according to any one of above-mentioned<1>～<20>, wherein, constitute the quantity of the above-mentioned elastomeric element of above-mentioned pars contractilis, it is preferably more than 8, more preferably more than 10, and preferably less than 30, more preferably less than 20, quantity at the above-mentioned elastomeric element of above-mentioned bottom pars contractilis configuration, it is preferably more than 5, more preferably more than 10, and preferably less than 20, more preferably less than 15, quantity at the above-mentioned elastomeric element of above-mentioned top pars contractilis configuration, it is preferably more than 3, more preferably more than 4, and preferably less than 10, more preferably less than 8.

<22>disposable diaper as according to any one of above-mentioned<1>～<21>, wherein, constitutes the sheet material of above-mentioned pars contractilis, is spun-bonded/melt-blown/spunbond (SMS) non-woven fabrics including polypropylene fibre.

<23>disposable diaper as according to any one of above-mentioned<22>, wherein, the grammes per square metre of above-mentioned sheet material is preferably 8g/m²Above, more preferably 10g/m²Above, and preferably 20g/m²Hereinafter, more preferably 15g/m²Below.

Embodiment

Hereinafter, further illustrate the present invention by embodiment, but the present invention is not limited to the examples.

(embodiment 1)

Make the disposable diaper of the deploying type with the basic structure as the diaper 1 shown in Fig. 1～Fig. 4, as the sample of embodiment 1.The size of each several part etc. (allocation position etc. of pull stap) table 1 described as follows sets.In addition, so that the dilation matrices of pars contractilis 8, the bottom pars contractilis 8A1 at absorber configuring area A1 different between the top pars contractilis 8A2 of absorber non-configuring area A2 (magnitude relationship making top pars contractilis 8A2 <bottom pars contractilis 8A1 is set up), at top pars contractilis 8A2,5 elastomeric elements 81 are configured respectively in the way of percentage elongation is 30%, at bottom pars contractilis 8A1,9 elastomeric elements 81 are configured respectively in the way of percentage elongation is 50%.As positive dough sheet, use grammes per square metre is 25g/m²The hot-wind nonwoven cloth of liquid permeability.As back sheet and side seal portion, using grammes per square metre respectively is 20g/m²Opaque liquid and poisture-penetrability polyethylene manufacture resin molding (cooperation calcium carbonate).As absorber, use and will include Time of Fluff Slurry (fluff pulp) 160g/m²With water absorbent polymer 250g/m²Total grammes per square metre of homogeneous mixture be 410g/m²The outer surface of absorbent core, use grammes per square metre is 20g/m²Liquid permeability cotton paper cover parts.The overall length of the length direction of this absorbent core is 370mm, and the overall length (maximum length) of width is 115mm.As 2 sheet materials of composition pars contractilis, using the grammes per square metre including acrylic resin respectively is 15g/m²SMS non-woven fabrics, additionally, as multiple elastomeric elements, use the elastomeric element of the wire that the polyurethane of fiber number 450dtex makes.Elastomeric element is carried out by hot melt adhesive to the fixing of sheet material.

(embodiment 2～4 and comparative example 1～2)

In addition to suitably changing (allocation positions etc. of pull stap) such as the sizes of each several part, make the disposable diaper of deploying type similarly to Example 1, as embodiment 2 and 3 and the sample of each comparative example.As the elastomeric element of composition pars contractilis, the elastomeric element of the wire that the polyurethane of use fiber number 310dtex is made, in addition, make flat type disposable diaper similarly to Example 1, as the sample of embodiment 4.

(evaluation)

Each sample (disposable diaper) to embodiment and comparative example, evaluates conformability, skew dropping by following method.These results are shown in table 1 below.Additionally, the symbol of W1, the L1 etc. in table 1 is corresponding to the same-sign in figure.

<evaluation method of conformability>

On the Infant model of acrylic acid, dress has sample, the outward appearance of visualization sample, and touch sample with hand, sensory evaluation from the floating of the skin face of this model of sample, sample with or without lax, there is not the situation floating and relaxing is A, exist and a certain degree of float and relax but the most no problem situation is B, float, the lax situation existing more is C.

<evaluation method of skew dropping>

Inject 200g artificial urine in the sample, afterwards, this sample is worn on the Infant model of polyurethane, measure the skew amount of dropping lighted by sample when opening 20 times about two legs of this model from benchmark, it is A almost without the situation (situation that the skew amount of dropping is almost nil) occurring skew to drop, visible a certain degree of skew is dropped but the most no problem situation (the skew amount of dropping is the situation of below 10mm) is B, and the situation (the skew amount of the dropping situation more than 10mm) that high-visible skew is dropped is C.The composition of artificial urine is as follows.Urea 1.94 mass %, sodium chloride 0.7954 mass %, magnesium sulfate (heptahydrate) 0.11058 mass %, calcium chloride (dihydrate) 0.06208 mass %, potassium sulfate 0.19788 mass %, ethoxylated dodecyl alcohol 0.0035 mass % and ion exchange water (residual volume)

Table 1

As shown in table 1, the conformability of any one of the disposable diaper of embodiment is the most excellent, is difficult to skew and drops.On the other hand, the disposable diaper of comparative example 1, it is primarily due to the region (with reference to Fig. 4) that the major part of band base portion is not present in being clipped by foreign side the first imaginary line V1p and interior side the first imaginary line V1q, result conformability is poor.Additionally, the disposable diaper of comparative example 2, being primarily due to the region (with reference to Fig. 4) that the major part of band grip part is not present in being clipped by 2 second imaginary lines V2, V2, result prevents from offseting the poor performance dropped.As mentioned above, in order to improve the conformability of disposable diaper, the position relationship particular importance of the major part of the multiple elastomeric elements and the band base portion that configure at the pars contractilis of drosal part, in addition, prevent from offseting the performance dropped to improve, in the position relationship particular importance of the major part of multiple elastomeric elements and the band grip part of bottom pars contractilis 8A1 configuration.

Claims (24)

1. a disposable diaper, it has main body, this main body include positive dough sheet, back sheet and Absorber between two sheets, has drosal part, crotch and veutro portion in the longitudinal direction, The edge, the left and right sides of this drosal part is provided with a pair pull stap, the feature of this disposable diaper It is:

Described drosal part has at described length direction: also exist described absorber from described crotch The absorber configuring area of the extension in portion；There is not the non-configuring area of absorber of this extension Territory,

At described drosal part, it is included between described positive dough sheet and described back sheet with elongation state The pars contractilis of the elastomeric element of the multiple identical fiber number of configuration, is arranged on described absorber configuring area Territory and the non-configuring area of described absorber, this pars contractilis is by being formed at this absorber configuring area Bottom pars contractilis and the top pars contractilis formed at the non-configuring area of this absorber are constituted, under this Portion's pars contractilis and this top pars contractilis are each configured with this elastomeric element multiple,

Constitute the multiple described elastomeric element of described pars contractilis, fiber number at below 450dtex, this bullet The telescopic direction of property parts and the width one of the described main body being orthogonal to described length direction Cause, interval configuration on this length direction,

At the described elastomeric element of described bottom pars contractilis configuration, from described in described absorber One side side of the foreign side of width cross this absorber extend to the opposing party side and with this absorption The part that body weight is folded, has the non-telescoping portion manifested of the retractility inhibiting this elastomeric element,

Pars contractilis contractility compared with the pars contractilis of described bottom in described top is less,

Described pull stap includes: the band base portion engaged with described main body；And be connected with this band base portion And to the band grip part of the width foreign side extension of this main body, this band grip part and this band base portion The length comparing described length direction is shorter,

With constitute described pars contractilis multiple described elastomeric element in, be positioned at described length side To foreign side elastomeric element as one man, draw in the foreign side that described width extends One imaginary line, and as one man draw with the most square elastomeric element being positioned at this length direction When interior side's the first imaginary line that this width extends,

The upper end of the outward side being positioned at described length direction of described band base portion, be positioned at described in The vicinity of foreign side's the first imaginary line and be positioned at compared with described foreign side the first imaginary line more By the position of the interior side of this length direction, or it is positioned at compared with this foreign side's the first imaginary line More lean on the position of the foreign side of this length direction,

It is positioned at the bottom of the described band base portion of the side contrary with described upper end, is positioned at described The vicinity of interior side's the first imaginary line and being positioned at compared with described side the first imaginary line More by the position of foreign side of this length direction, or it is positioned at and this side's the first imaginary line phase Than the position of the interior side more leaning on this length direction, and,

The major part of described band base portion is present in by described foreign side the first imaginary line and described The region that interior side's the first imaginary line clips,

With in the multiple described elastomeric element that described bottom pars contractilis configures, be positioned at described The elastomeric element of foreign side and the interior side of length direction the most as one man, draws at described width During 2 the second imaginary lines that direction extends, the major part of described band grip part is present in by 2 The region that this second imaginary line individual clips.

2. disposable diaper as claimed in claim 1, it is characterised in that:

With in the multiple described elastomeric element that described top pars contractilis configures, be positioned at described The elastomeric element of foreign side and the interior side of length direction the most as one man, draws at described width Direction extend 2 three imaginary lines time, 2 the 3rd imaginary lines leave distance and 2 The distance of leaving of individual described second imaginary line is compared shorter.

3. disposable diaper as claimed in claim 1 or 2, it is characterised in that:

The length of the described width that described pars contractilis is arranged in described drosal part is maximum Big width segments, described foreign side the first imaginary line and interior described side's the first imaginary line Leave the described length direction of the Breadth Maximum part that distance is this drosal part length 60% with On.

4. disposable diaper as claimed in claim 1 or 2, it is characterised in that:

Non-skin opposite face in described veutro portion is provided with taking of band grip part described in set Band, a length of this of the described length direction of this band grip part takes this length direction of band More than the 70% of length.

5. disposable diaper as claimed in claim 4, it is characterised in that:

The described length direction of described band grip part a length of described in take the length direction of band Less than more than the 80% 100% of length.

6. disposable diaper as claimed in claim 4, it is characterised in that:

A length of more than 30mm below the 80mm of the described described length direction taking band.

7. disposable diaper as claimed in claim 4, it is characterised in that:

In the both sides alongst of described main body, a pair three-dimensional gauffer and a pair leg Gauffer is by configuring gauffer formation elastomeric element with elongation state on this length direction respectively And formed,

The described gauffer formation of at least one party of described three-dimensional gauffer and described leg creases is elastic Parts, when overlooking described main body, the one end of its described length direction and described pars contractilis weight Folded, the other end is with described to take band overlapping.

8. disposable diaper as claimed in claim 7, it is characterised in that:

Described three-dimensional gauffer formation elastomeric element and described leg creases formation elastomeric element divide Not with described pars contractilis and described in take band when vertical view overlapping.

9. disposable diaper as claimed in claim 1 or 2, it is characterised in that:

The fiber number of the multiple described elastomeric element constituting described pars contractilis is more than 150dtex Below 450dtex.

10. disposable diaper as claimed in claim 1 or 2, it is characterised in that:

Described pars contractilis, in addition to multiple described elastomeric elements, is additionally included in described positive dough sheet And 2 sheet materials of configuration between described back sheet, these elastomeric elements multiple are pressed from both sides with elongation state Hold and be fixed between 2 these sheet materials,

Described non-telescoping portion, by being clipped in 2 institutes by the elastomeric element of described bottom pars contractilis When stating between sheet material, by part overlapping with described absorber during vertical view in this elastomeric element In the way of not flexible, it is fixed on two sheet materials at least partially and is formed.

11. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

The length of the described width in described non-telescoping portion is relative to the described width of described absorber The ratio of the length in degree direction is less than more than 70% 95%.

12. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

The contractility of described bottom pars contractilis is more than 1.0N below 6.0N, stretches in described top The contractility in portion is more than 0.5N below 3.0N.

13. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

The ratio of the contractility of described bottom pars contractilis and the contractility of described top pars contractilis is, under More than portion's pars contractilis/pars contractilis=1.2, top less than 5.0.

14. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

Described pars contractilis substantially has the described length side of the continuous print stretching region of retractility To a length of more than 50mm below 100mm.

15. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

Described bottom pars contractilis has described length direction a length of of the part of retractility More than 20mm below 60mm.

16. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

A length of more than 50mm below the 100mm of the described length direction of described band base portion.

17. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

A length of more than 20mm below the 60mm of the described length direction of described band grip part.

18. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

A length of more than the 60mm of the described length direction of the Breadth Maximum part of described drosal part Below 120mm.

19. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

A length of more than 80mm below the 140mm of the described width of described absorber.

20. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

A length of more than 70mm below the 120mm of the described width in described non-telescoping portion.

21. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

The length of the described length direction of described band grip part is relative to the described length of described band base portion The ratio of the length in degree direction is less than more than 40% 70%.

22. disposable diapers as claimed in claim 1 or 2, it is characterised in that:

The quantity of the described elastomeric element constituting described pars contractilis is more than 8 less than 30, The quantity of the described elastomeric element of described bottom pars contractilis configuration is more than 5 less than 20, The quantity of the described elastomeric element of described top pars contractilis configuration is more than 3 less than 10.

23. disposable diapers as claimed in claim 10, it is characterised in that:

Constitute the sheet material of described pars contractilis, be the spun-bonded/melt-blown/spunbond nonwoven including polypropylene fibre Cloth.

24. disposable diapers as claimed in claim 23, it is characterised in that:

The grammes per square metre of described sheet material is 8g/m²Above 20g/m²Below.