CN1618418A

CN1618418A - Disposable diaper

Info

Publication number: CN1618418A
Application number: CNA2004100952542A
Authority: CN
Inventors: 丰岛晴子; 相良早苗
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2003-11-21
Filing date: 2004-11-22
Publication date: 2005-05-25
Anticipated expiration: 2024-11-22
Also published as: TW200518723A; KR20050049385A; KR101141082B1; CN100512781C; TWI351946B

Abstract

This pants type disposable diaper is equipped with a liquid retainable absorptive body, has an abdominal side part A, a crotch part C, and a back side part B, and is formed of a waist opening part and a pair of leg opening parts. A ratio (L1/L2) between the minimum value L1 of the crotch width and a distance L2 in the longitudinal direction from a point P on an opening edge part 82 where the crotch width becomes the minimum to the end point Q of the abdominal side part A side of the opening edge part 28 is 1.7-2.2.

Description

Disposable diaper

Technical field

The present invention relates to a kind of pull-on disposable diaper that can easily wear.

Background technology

As disposable diaper, we knew the Briefs type diaper (the Japan Patent spy opens the 2001-478 communique) of child (the high monthly age youngster) usefulness of the walking of can standing ourselves in the past.

Pull-on disposable diaper in the past be by a foot of a foot of child that makes standing state pass two leg openings and put on.

Therefore, do not consider to stand up and maybe can not hold up thing so low monthly age youngster that stands up to wear, particularly do not consider under the recumbency state, to wear.Therefore, do not provide the Briefs type diaper that is suitable for low monthly age youngster use.

Summary of the invention

The present invention's (the 1st scheme) relates to a kind of lower limb and can prevent spilling around the lower limb of can preventing from exceedingly to tie tight, and the foot that makes the baby when wear diaper is easily by leg opening part, and dress easily is particularly suitable for the pull-on disposable diaper of low monthly age youngster use.

The present invention's (the 2nd scheme) relates to a kind of lower limb and can prevent spilling around the foot of can exceedingly not tying tight, and make baby's foot can easily pass through leg opening part when wearing diaper, dress easily is particularly suitable for the pull-on disposable diaper that low monthly age youngster uses.

The invention provides disposable diaper, it is the absorber that possesses liquid retainability, comprise veutro portion, lower crotch and drosal part, and be formed with the pull-on disposable diaper of waist opening portion and a pair of leg opening part, hip when the minima L1 of width be positioned at this hip when width for the some P on the minimum edge of opening position, above-mentioned each leg opening part to the end points Q of veutro portion one side of this edge of opening along diaper longitudinally the ratio (L1/L2) of distance L 2 be 1.7～2.2 (below, just be meant this scheme when mentioning the 1st scheme).

The invention provides disposable diaper, it is the absorber that possesses liquid retainability, comprise veutro portion, lower crotch and drosal part, and be formed with the pull-on disposable diaper of waist opening portion and a pair of leg opening part, waist portion circumferentially has retractility along it, and the end line of the length direction of above-mentioned absorber is 50～150cN to the zone of the last end line of above-mentioned leg opening part along 50% o'clock the tensile load that the width of diaper is elongated to the maximum elongation rate in this waist portion; Hip when the minima L1 of width be positioned at this hip when width be 2.0～2.5 for the some P on the minimum edge of opening position, above-mentioned each leg opening part to the ratio (L1/L3) of the distance L 3 of the La of imaginary line longitudinally of the diaper of the end points Q of veutro portion one side by this edge of opening; If the area in the imaginary line Lb of above-mentioned some P of connection and above-mentioned end points Q and the zone that edge of opening surrounded of above-mentioned leg opening part is S1, the area in above-mentioned two zones of the diaper by this P when the area in imaginary line Lc, the zone that surrounded with the imaginary line Ld and the above-mentioned imaginary line Lb of this imaginary line Lc orthogonal and the diaper width by above-mentioned end points Q is S2 longitudinally is 0.45～0.55 than (S1/S2) (below, just be meant this scheme when mentioning the 2nd scheme).

Description of drawings

Fig. 1 is the perspective view of expression as the disposable diaper of an embodiment of the 1st scheme.

Fig. 2 is the expansion of disposable diaper of presentation graphs 1 and the vertical view of elongation state.

Fig. 3 is expression along the pattern sectional drawing of the II-II line section of the section (hip is when the section of width for minimum position) of the I-I line of Fig. 2 and Fig. 7.

Fig. 4 is used for the vertical view of outer shape of the expansion of the disposable diaper shown in key diagram 1 and Fig. 6 and elongation state.

Fig. 5 (a)～Fig. 5 (d) is the figure that expression is worn in Fig. 1 and disposable diaper shown in Figure 6 neonate (low monthly age youngster) appearance on one's body, Fig. 5 (a) is the state that from the outside of diaper hands is inserted the leg opening part, Fig. 5 (b) is a state that foot is pulled out from a leg opening part catching the baby who lies on the back with this hands, Fig. 5 (c) is the state that uses the same method the another foot is pulled out from another leg opening part, Fig. 5 (d) makes expression put on diaper, finishes the figure of the state of dress.

Fig. 6 is the perspective view of expression as the disposable diaper of an embodiment of the 2nd scheme.

Fig. 7 is the expansion of disposable diaper of presentation graphs 6 and the vertical view of elongation state.

The specific embodiment

With reference to accompanying drawing the present invention is described according to better embodiment below.

At first, with reference to the disposable diaper 1 of Fig. 1～Fig. 5 explanation as an embodiment of the 1st scheme.

As shown in Figure 1, disposable diaper 1 is the Briefs type diaper.As shown in Figures 2 and 3, diaper 1 possesses: the absorbability body 10 that has liquid permeability surficial sheets 2, opaque liquid back-sheet 3 and be clipped in the liquid retainability absorber 4 between two sheet materials 2,3, and be positioned at the outside (non-human body contact surface one side) of this absorbability body 10, the exterior body 5 of this absorbability body 10 of secure bond, have the A of veutro portion of abdominal part one side that is provided in the wearer when wearing and be provided in the drosal part B of back one side and the lower crotch C between them.And, the both sides of the edge of the A of veutro portion and the both sides of the edge portion of drosal part B interosculate with well-known associated methods such as heat seal, high frequency sealing or ultrasonic sealings, form a pair of

side seals

50,50, by this combination, on diaper 1, form waist opening portion 7 and a pair of leg opening

part

8,8.

As shown in Figure 2, absorbability body 10 is the lengthwise rectangle, makes its length direction consistent with vertical (above-below direction of Fig. 2 is called the length direction of diaper) of diaper 1, is bonded to the central authorities of the width of exterior body 5 with well-known associated methods.Absorber 4 is the hourglass shape that the central authorities of length direction attenuate, and is gripped by surficial sheets 2 and back-sheet 3.

As shown in Figures 2 and 3, absorbability body 10 is formed with a pair of the 1st stereo enclosure (three-dimensional ガ one De) 6A, 6A and the 2nd stereo enclosure 6B, the 6B that extends along its length in its left and right sides.As shown in Figure 3, the 1st stereo enclosure 6A has free end 61A in the inboard of the width of absorbability body 10, and (root of holding up) 62 that have stiff end in the outside.Near free end 61A along the flexible elastic component 63A that freely is equipped with of this free end 61A.And the 2nd stereo enclosure 6B has and exterior body 5 fixed stiff ends 64, more by the outside of width free end 61B is being arranged than this stiff end 64.Near free end 61B along the flexible elastic component 63B that freely is equipped with of this free end 61B.

As shown in Figures 2 and 3, exterior body 5 is made of the duplexer of outer layer sheet 51 and internal layer sheet material 52.Outer layer sheet 51 constitutes the outermost of diaper 1, and internal layer sheet material 52 and outer layer sheet 51 disposed adjacent are in the inside of diaper 1 side.Outer layer sheet 51 has from the edge, front and back end of internal layer sheet material 52 extension that extend at rear forward, after on the internal layer sheet material 52 that absorbability body 10 is configured in exterior body 5, these extensions are gone back to this absorbability body 10 1 sides and bonding with it respectively, cover the front and back end of this absorbability body 10.

As depicted in figs. 1 and 2, diaper 1 has a pair of side rivel (pars contractilis that broad ways is flexible) 90 respectively on the D1 of waist portion, the D2 of A of veutro portion and drosal part B, and thus, the D of waist portion of diaper 1 has along circumferential retractility.And, be respectively equipped with waist rivel 70 on waist E1, the E2 among A of veutro portion and the drosal part B, thus, the waist E of diaper 1 has along circumferential retractility.

Here, waist E is the zone of 1/10 length of the edge of opening 72 upright crotch length to the below from waist opening portion 7.On the other hand, the D of waist portion is the zone of position top that is positioned at the below of waist E and is positioned at the upper end 83 of leg opening part 8.

As depicted in figs. 1 and 2, waist rivel 70 so that the mode that waist elastic members 71 is extended along the edge of opening 72 of waist opening portion 7 respectively to be fixed on waist E1, E2 among A of veutro portion and the drosal part B with elongation state last and form.

One offside rivel 90,90 so that many elastic components 91 respectively to the state of the circumferential prolongation of each D of waist portion be separately fixed at A of veutro portion and drosal part B the D1 of waist portion, D2 is last and be formed.These elastic components 91 are set at least with the state of elongation and are fixed on than the both sides of the edge of absorber 4 more by the position in the width outside, and with the setting with the state that does not present elastic extension at the central part of width at least of absorber 4 eclipsed positions.Elastic component 91 is to be split into two state configuration on the width of diaper.

And its edge of opening 82 is formed with shank rivel 80 in leg opening part 8 upper edges.Shank rivel 80 is formed with the fixing many elastic components 81 of the state of elongation along edge of opening 82.

Each above

elastic component

71,81 and 91 all is clamped and fixed between the outer layer sheet 51 and internal layer sheet material 52 that constitutes exterior body 5.

Diaper 1 is used for low monthly age youngster, and the length of upright crotch is 50～220mm.The length L 4 of upright crotch is 1/2 length of the total length LT (with reference to Fig. 4) of the diaper of expansion and elongation state.

Here, launch and elongation state is meant and tears side seals to make diaper be deployed condition, make the elastic component elongation of various piece, make the diaper of this deployed condition be extended to the state of design size (with under the state of the influence of having got rid of all elastic components, being extended to measure-alike when plane).

As shown in Figure 4, the hip of diaper 1 when the minima L1 of width (the distance between the edge of

opening

82,82 of a pair of leg opening part 8,8) L along the width of diaper be positioned at this hip when width L for the some P on the minimum edge of opening 82 position, each leg opening part 8 to the diaper of the end points Q of the A of veutro portion one side of the edge of opening 82 of leg opening part 8 be 1.7～2.2 apart from the ratio (L1/L2) of (along the distance of vertical measurement of diaper) L2 longitudinally, be preferably 1.8～2.0.If in this scope, even lower limb bends to the build of ㄑ font as low monthly age youngster, will narrate such wearing method with the back, also dress easily under the state of recumbency, dress afterwards Excreta is not easy to spill from leg opening part.

The present inventor finds, when the direct minification of will high monthly age youngster in the past using of Briefs type diaper is worn in low monthly age youngster on one's body the time, lower limb be not easy by.When analyzing its reason, know that reason at first is the contractility of leg opening part.That is, the diaper that the high monthly age youngster that excretion is many uses has strengthened contractility in order to prevent from the leakage of leg opening part, and therefore leg opening part is difficult to open under the state of low monthly age youngster recumbency allowing, and is difficult to allow lower limb pass through.But, when reducing the contractility of peristome in order to address this problem, produce the problem that Excreta is leaked easily.That is, also be not easy to leak, even and the also exploitation of the Briefs type diaper of dress and being not easy easily of father and mother under the state of low monthly age youngster recumbency even for example reduce the contractility Excreta.

But the present inventor has carried out various researchs, if the Briefs type diaper L1/L2 too small (less than 1.7) that discovery high monthly age youngster in the past uses is with leakage is relevant easily.So increase this value, find sharply to reduce from the leakage of leg opening part.And in this case, even the contractility of leg opening part is not the very strong sufficient anti-leak performance that yet can obtain.And if ad infinitum increase this value on the other hand, such lower limb that bends to the ㄑ font is difficult to by leg opening part when finding low monthly age, is difficult to dress.Particularly under the situation that the function of joint as the neonate is not also fully grown up, too worry dislocates and has lost the motivation of wearing.Therefore,, can prevent to leak again dress easily for the low such bodily form of monthly age youngster if in above-mentioned scope, more satisfactory.

As shown in Figure 4, when with diaper 1 halve launching and the intermediate line (along the Central Line that the diaper width extends) of elongation state total length LT down be that the boundary is divided near the front body hunk F of the A of veutro portion with near the large stretch of G of the back body of drosal part the time, it is the position of minimum as width L that above-mentioned hip is arranged on above-mentioned front body hunk F.And, length direction from this position along diaper in the past backward hip increase gradually as width L.

And, in the predetermined length of the length direction of diaper, represent under the situation of minima that at hip making, the position of the central authorities of close length direction is the position that hip is worked as the width minimum as width L.But, in this case, the position that preferably makes the expression minima for from the length direction of diaper central authorities to the diaper total length of end direction 1/10 in.

opening

82,82 of a pair of leg opening part 8,8) L along the width of diaper be positioned at this hip and be preferably 2.0～2.5,2.2～2.4 better for the some P on the minimum edge of opening 82 position, each leg opening part 8 to the ratio (L1/L3) of the distance of vertical imaginary line La of the diaper of the end points Q of the A of veutro portion one side of the edge of opening 82 by leg opening part 8 (along the distance of the width measurement of diaper) L3 as width L.

By make above-mentioned than (L1/L3) in above-mentioned scope, become more the baby who is fit to supine position, the shape of the curved shape of the bipod of dividing right and left that particularly low monthly age youngster is such.

And, as shown in Figure 4, if connecting the area of the arcuate region H that the edge of opening 82 of the imaginary line Lb of above-mentioned some P and above-mentioned end points Q and this leg opening part 8 surrounds is S1, diaper by above-mentioned some P is imaginary line Lc longitudinally, imaginary line Ld with the diaper width of this imaginary line Lc orthogonal and the upper end Q by above-mentioned leg opening part 8, when the area in the zone (zone of inclusion region H and regional J) of the right angled triangle that surrounds with above-mentioned imaginary line Lb is S2, then the area in two zones of diaper 1 is preferably in 0.45～0.55 than (S1/S2), and 0.46～0.50 is better.

By make above-mentioned than (S1/S2) in above-mentioned scope, when wearing diaper, the easier foot that makes the baby is by leg opening part, foot by after easier putting on.

And the minima L1 that the hip of the diaper 1 of present embodiment is worked as width L is about 150～170mm, and above-mentioned distance L 2 is about 75～95mm.By making L1/L2 in above-mentioned scope, make L1 and L2 simultaneously in this scope, easier the passing through of lower limb of the low monthly age youngster bodily form.If particularly L2 is in above-mentioned scope, then Excreta is difficult to leak from leg opening part especially.

And above-mentioned distance L 3 is about 65～75mm, above-mentioned area S1 is 13.5～19.0cm ²About, above-mentioned area S2 is at 25.0～35.0cm ²About, because it is the lower limb to the wearer is suitable especially like this, therefore more satisfactory.

If supposing to connect the area of the arcuate region K that the edge of opening 82 of the imaginary line Le of end points Q ' of drosal part B side of edge of opening 82 of above-mentioned some P and leg opening part and this leg opening part surrounds is S3, diaper by this P is imaginary line Lc longitudinally, when being S4 with the area in the zone (zone of inclusion region K and regional M) of this imaginary line Lc orthogonal and the imaginary line Lf of the diaper width by above-mentioned end points Q ' and the right angled triangle that above-mentioned imaginary line Le is surrounded, then the area in above-mentioned two zones of the diaper 1 of present embodiment is 0.45～0.55 than (S3/S4), particularly 0.46～0.50, can prevent further that like this Excreta from leaking from lower crotch, therefore more satisfactory.

The diaper 1 of present embodiment particularly can easily be worn on one's body the low monthly age youngster of supine position.The wearing method of diaper has no particular limits, and below represents the example of best wearing method.

(wearing method)

Shown in Fig. 5 (a), a hands inserts in the leg opening part 8, catches shown in the foot image pattern 5 (b) with this hands and pulls out this foot from leg opening part like that.Such another foot is pulled out from another leg opening part too shown in Fig. 5 (c) then.After bipod passes through, shown in Fig. 5 (d), put on the waist of diaper like that until the wearer.Like this, on one's body the low monthly age youngster that diaper 1 easily can be worn in supine position waits.

If use the diaper 1 of present embodiment, by make above-mentioned than (L1/L2) in above-mentioned specific scope, the shape of leg opening part extremely is applicable to the baby's neonatal lower limb that separates to the left and right of lower limb particularly that inserts supine position.

Therefore, when use-case such as above-mentioned preferable wearing method are worn diaper, after hands being inserted leg opening part and catching baby's foot, the action that can use this hands that baby's foot is pulled out from leg opening part extremely swimmingly.

And,,, also can around lower limb, obtain sufficient stickiness even therefore pay stronger contractility to leg opening part without elastic component 81 because being shaped as of leg opening part makes leg opening part be particularly suitable for the particularly shape of neonatal lower limb of baby.Therefore, can prevent from excessively to oppress around baby's the lower limb.

And a part of 81a of the elastic component 81 that the above-mentioned shank rivel of the formation of diaper 1 is used extends in the side rivel (pars contractilis) 90 in the D1 of waist portion, the D2 among A of veutro portion and the drosal part B always.Extend to a part of 81a that means elastic component 81 in the pars contractilis always and enter in the zone that is equipped with elastic component 91, be specially vertically entering between the adjacent elastic component 91 at diaper.A part of 81a of elastic component 81 also can only enter into any one pars contractilis of A of veutro portion and drosal part B.

And as mentioned above, diaper 1 is formed with shank rivel 80 at its edge of opening of leg opening part 8 upper edges, vertically is formed with a pair of

stereo enclosure

6B, 6B in the both sides longitudinally of diaper along diaper.Therefore,, prevent that the effect of leakage of exudates is also very high, therefore give the wearer with good tactility even the contractility of shank rivel peristome is more weak.

And such effect is as long as exist at least one pair of stereo enclosure just can prove effective.That is, also can prove effective under either party situation in only having the 1st stereo enclosure and the 2nd stereo enclosure.

Tensile load (hereinafter referred to as " tensile load of shank rivel ") when making the position that has formed the shank rivel be stretched to percentage elongation to deduct 20% percentage elongation for the maximum elongation rate is 100～250cN, 150～220cN particularly, can not be with rubber to rein in trace, soft comfortable, this point is very desirable.Even diaper of the present invention also can fully suppress the leakage from leg opening part under the situation of for example so little flexible stress.

The elongation load of shank rivel is measured as follows.

[assay method of the elongation load of shank rivel]

Width with required degree downcuts the position that has set leg elastic member from diaper, stretches along the vertical corresponding direction with diaper with the Tan Xilun cupping machine.Present embodiment has been used the RTA-100 (strain) of オリエ Application テ Star Network corporate system.Here " width of required degree " is meant for the elongation of measuring this position necessary minimal width of loading, the width of not unnecessary (more than required) (for example needn't cut out the width that comprises absorber).

Distance between the initial chuck deducts the length of 50mm for natural length longitudinally (not making the length under the naturalness of elastic component elongation, initial length), and the two ends with sample are clipped on the chuck respectively.Then, be that the condition of 300mm/min is stretched to sample the length about length (the fixedly natural length of the member of the elastic component)-10mm of maximum elongation with the translational speed of slide block (crosshead).Obtain the tensile load (tensile force) when the maximum elongation rate deducts 20% percentage elongation then.

Then, with reference to Fig. 3, Fig. 4, Fig. 6 and Fig. 7 explanation disposable diaper 1A as an embodiment of the 2nd scheme.And the section along the II-II line of Fig. 7 (hip is the section at the position of minimum when width) is identical with the section along the I-I line (hip is when the section of width for minimum position) of Fig. 3.

As shown in Figure 6, disposable diaper 1A is for hanging down the Briefs type diaper that the monthly age youngster uses.Because diaper 1A has the structure identical with above-mentioned diaper 1, the point of particular importance describes in therefore main just different with above-mentioned diaper 1 point or the 2nd scheme, and for identical point, adds identical Reference numeral, omits its explanation.There is not the relevant explanation of the suitable above-mentioned diaper 1 of point of special narration.

50% o'clock the tensile load (hereinafter referred to as " the elongation load of waist portion ") of the region D from the end line 44 of the length direction of absorber 4 to the last end line 84 of leg opening part 8 among the D of waist portion of disposable diaper 1A ' be stretched to the maximum elongation rate at the width along diaper is 50～150cN, is preferably 50～130cN.

Here, so-called " end line of the length direction of absorber 4 " is meant end 41 (42) the formed lines of length direction of absorber 4 and the line that they are prolonged along the width of diaper.And so-called " the last end line of leg opening part " is meant the line of each upper end that connects a pair of leg opening part.

If the tensile load of waist portion (below be also referred to as tensile stress) is less than 50cN, then since be worn in the smaller baby of waist girth tie tight on one's body the time force rate a little less than, therefore exist and do not follow moving and the possibility of landing.If the elongation stress of waist portion surpasses 150cN, then exist can not be swimmingly with hands from leg opening part insert catch the action of foot and pull out from leg opening part the foot caught may, and what the muscle of oppressing the baby consumingly arranged in dress may.

Though the tensile load of above-mentioned waist portion at least the region D in the D of waist portion from the end of the length direction of above-mentioned absorber to lower crotch (identical) with upper end to leg opening part ' be just passable in the above-mentioned scope, it is better in above-mentioned scope to cut out the tensile load that the integral body of the D of waist portion measures.

The tensile load of waist portion (situation that the tensile stress of being expressed as is also arranged) is measured in order to following method.

[assay method of the tensile load of waist portion]

With the annular state of connection part D1 that is arranged in veutro portion and the part D2 that is positioned at drosal part from diaper downcut the waist D of portion from the end 41 of the length direction of absorber 4 to the region D of the upper end 83 of leg opening part 8 ', with it as sample.And, the edge of opening 72 of waist opening portion to the distance between the end 41,42 of the length direction of absorber 4 under the A of the veutro portion situation different with drosal part B, the position that not necessarily is confined to the length direction end 42 of the absorber among the drosal part B is a benchmark, is that benchmark downcuts the A of the veutro portion scope identical with drosal part B (arriving the equidistant scope of the edge of opening 72 of waist) with the end 41 of the length direction of the A of veutro portion.

This sample is placed on the horizontal plane, the one side (forming the face of the outside of diaper) of the part that is positioned at veutro portion is connected with this horizontal plane, and the length of measuring (between the left and right sides sealing envelope portion) between the two ends of this sample under the nature contraction state is as initial length.

Then, (オリエ Application テ Star Network limited company system, between chuck RTC-1150A), the direction identical with the width of diaper with the speed edge of 300mm/min stretches this sample to be fixed on the Tan Xilun cupping machine.

Then, sample is stretched to Fig. 7 and design size shown in Figure 4 from initial length (to launch with diaper and elongation state measure-alike, but, under the D1 of waist portion of the A of the veutro portion situation different, get its meansigma methods) with the design size of the D2 of waist portion of drosal part B, with the percentage elongation [(length-initial length after the elongation)/initial length * 100] of this moment as the maximum elongation rate, the tensile load when asking for 50% the percentage elongation that is elongated to this maximum elongation rate.

As shown in Figure 4, the above-mentioned of diaper 1A is 2.0～2.5 than (L1/L3), is preferably 2.2～2.4.

If above-mentioned than (L1/L3) less than 2.0, then hip diminishes when width, it is big that leg opening part becomes, so lower limb passes through easily, recumbency is worn easily, it is relatively good that this point can be thought, but Excreta spills from leg opening part easily conversely.If should be worth, then be very difficult to take place leakage of exudates more than 2.2.If above-mentionedly surpass 2.5 than (L1/L3), then because hip broadens when width, though Excreta is difficult to spill, because low monthly age youngster's lower limb bends to the ㄑ font, so lower limb is difficult to by leg opening part, recumbency is difficult to dress.If should value below 2.4, then be worn in the wearing property raising of low monthly age youngster on one's body the time, and be difficult to hinder the mobility when wear, so more satisfactory.

And, as shown in Figure 4, if supposing to connect the area of the arcuate region H that the edge of opening 82 of the imaginary line Lb of above-mentioned some P and above-mentioned end points Q and this leg opening part 8 surrounds is S1, diaper by above-mentioned some P is imaginary line Lc longitudinally, with the imaginary line Ld of the diaper width of this imaginary line Lc orthogonal and the upper end Q by above-mentioned leg opening part 8 and the area in the right angled triangle zone (zone of inclusion region H and regional J) that above-mentioned imaginary line Lb surrounds be S2, then the area in two zones of diaper 1A is preferably in 0.45～0.55 than (S1/S2), and 0.46～0.50 is better.

If above-mentioned than (S1/S2) less than 0.45, then leg opening part diminishes, so Excreta is difficult to spill, but because low monthly age youngster's lower limb bends to the ㄑ font, so lower limb is difficult to by leg opening part, dress becomes very difficult under the recumbency state.And if above-mentionedly surpass 0.55 than (S1/S2), then because leg opening part becomes big, so lower limb passes through easily, dress easily under the recumbency state, but Excreta spills from leg opening part easily conversely.

And easily by wearing easy this point, the minima L1 that hip is worked as width L is preferably 150～170mm from lower limb, and above-mentioned area S1 is preferably 13.5～19.0cm ²About, above-mentioned area S2 is preferably 25.0～35.0cm ²About.

The diaper 1A of present embodiment is also the same with above-mentioned diaper 1, can easily be worn on low monthly age youngster's the body of supine position.

If use the diaper 1A of present embodiment, load in above-mentioned specific scope by the elongation that makes waist portion, when use-case such as above-mentioned preferable wearing method are worn diaper, with be inserted into can easily the stretch waist portion of diaper of hands in the diaper by leg opening part, and, because the pressure from waist portion can not hinder freely moving of hands, therefore can carry out extremely swimmingly hands is inserted the action of catching infant's foot from leg opening part.And, in addition,, therefore catching the action that also can extract hands under the state of foot swimmingly because leg opening part also has specific shape, and in dress easy movable baby's foot, give baby's burden little.

And the elongation load by making waist portion shows good comfort (stickiness) to the interior baby from the smaller baby of waist girth to bigger baby on a large scale in above-mentioned specific scope.That is, even be worn under waist girth baby's situation on one's body littler than standard girth, the reduction of the power of tying tight is more steady, can prevent the deficiency of the power of tying tight; And under the baby's situation on one's body that is worn in than standard Zhou Changda, the increase of the power of tying tight is more steady, can prevent over-drastic tying tight or the deterioration of operability when wearing.

And a part of 81a of the elastic component 81 that the above-mentioned shank rivel of the formation of diaper 1A is used extends in the interior side rivel (pars contractilis) 90 of the D of waist portion always.Extend to a part of 81a that means elastic component 81 in the pars contractilis always and enter in the zone that is equipped with elastic component 91, be specially vertically entering between the adjacent elastic component 91 at diaper.

In diaper 1A, is 100～250cN along the width of diaper with 50% o'clock the tensile load (below be also referred to as " waist tensile stress ") that waist E is stretched to the maximum elongation rate, particularly 130～200cN is fine to easy degree and difficult landing degree two aspects carried on the diaper.Annular state with connection part E1 that is positioned at the A of veutro portion and the part E2 that is positioned at drosal part B downcuts waist E from diaper, and it as sample, in addition, is similarly measured the tensile stress of waist with the tensile stress of waist portion.

In addition, 50% o'clock tensile load (hereinafter referred to as " tensile stress of shank rivel ") along the maximum elongation rate that vertically shank rivel 80 is stretched to of diaper is 50～200cN, 80～150cN particularly, all fine by degree and level of comfort two aspects easily to low monthly age youngster's foot.

Width with necessary degree downcuts the position that has set leg elastic member from diaper, as sample, in addition, uses the method identical with the elongation stress of measuring waist portion to measure the elongation stress of shank it.Here " width of necessary degree " is meant for the elongation of measuring this position necessary minimal width of loading, and do not want unnecessary width (for example needn't cut out the width that comprises absorber).

And, pass through easily from low monthly age youngster's foot, and Excreta is difficult to spill this point from leg opening part especially, preferably make diaper 1A be positioned at hip when width L be 75～95mm for the some P on the minimum edge of opening 82 position, above-mentioned each leg opening part 8 to the distance L 2 (with reference to Fig. 4) of the end points Q of the A of the veutro portion side of the edge of opening 82 of leg opening part 8 along vertical mensuration of diaper.

As the

diaper

1,1 that constitutes the respective embodiments described above ' the material of each several part can use normally used material in this technical field with being not particularly limited.

For example, the non-woven fabrics or the perforated film that can use hydrophilic and have liquid permeability as surficial sheets 2.Can use the stacking material of resin film or resin film and non-woven fabrics etc. etc. as back-sheet 3.Can use the fine thing of the fine thing (of mixed product Hun He Plot that encases the particle of fluff pulp (Off ラ Star Off パ Le プ) and superabsorbent polymer with tissue paper (toilet paper) or non-woven fabrics etc. (hereinafter referred to as " packaging material ") as absorber 4) material etc.And preferably use the non-woven fabrics of water proofing property as the sheet material that constitutes stereo enclosure.Preferably use the non-woven fabrics made from various manufacture methods as outer layer sheet 51 and internal layer sheet material 52.

Elastic component as each several part can use various well-known elastic components respectively, for example, can enumerate thread material (silk rubber etc.) as the form of each elastic component, the banded material (flat rubber etc.) of preset width, the material of film like etc., formation raw material as elastic component can also be enumerated synthetic rubber such as butylbenzene, butadiene, isoprene, chlorobutadiene except that natural rubber, EVA, retractility polyolefin, urethane fat etc.

Preferably use the elastomeric thing of silk as the elastic component of paying waist portion retractility (waist portion elastic component) 90, the above-mentioned elastic component of using as formation shank rivel 81 preferably uses flat elastomeric material, and waist elastic members 71 is preferably used flat elastomeric thing.

Hip along the baby is worked as easily when wearing, the good this point of comfortableness (stickiness), and the flexural rigidity of absorber 4 is preferably in 1～25cN/50mm.Though flexural rigidity has the rigidity of diaper length direction and the flexural rigidity of width, the flexural rigidity of width is preferably in the above-mentioned scope at least.

The flexural rigidity of absorber 4 is measured with following method.

[assay method of flexural rigidity]

With Tan Xilun testing machine [RTC-1150A of (joint-stock company) オリエ Application テ Star Network corporate system], be that standard is measured (R1=5.0 ± 0.1mm, R2=5.0 ± 0.2mm) during mensuration with JIS standard K 7171 methods (test method of plastics flexural property).

Test film is crossed between the two edges of support platform that border width L is 50mm, and configuration pressure head top makes its contact test sheet just.At load cell (load cells) is that 5kg (range 200cN), speed are that pressure head is descended, and obtains load-deflection curve.The maximum of the bending stress that obtains is as bending rigid value (cN/50mm).

[modulator approach of test film]

From absorbent commodity, take out and comprise packaging material absorber together, begin to cut out on the length direction of diaper the rectangle test film of 80mm on 50mm, the width from the central authorities of its length direction and width.50mm in the unit of bending rigid value is the length of the minor face of test film, is the width of the test film that bent by pressure head at the trial.Test film is crossed between the two edges, makes its long limit with consistent to the direction at another edge from an edge.When the flexural rigidity of the width of measuring diaper, the length direction that cuts out diaper is that 80mm, width are the test film of 50mm.50mm in the unit of bending rigid value is, from the absorbent commodity of test film, do not taking out under the situation of the absorber that mixes with packing, mensuration comprises the values of stiffness of material of non-woven fabrics, thin film etc. and the values of stiffness of each material, according to the values of stiffness of this value calculating absorber, obtain the values of stiffness of absorber thus.

The preferred forms of the 1st and the 2nd scheme more than has been described, but the 1st and the 2nd scheme is not limited to above-mentioned embodiment, can do various changes in the scope of the aim that does not exceed each scheme.And though above-mentioned

diaper

1,1A are low monthly age youngster usefulness, the length of upright crotch is 50～220mm, the present invention's's (the 1st and the 2nd scheme) disposable diaper also can be high monthly age youngster with or the diaper of adult's usefulness.Be high monthly age youngster use diaper the time, the length of upright crotch is preferably in 100～300mm.When being the diaper of adult's usefulness, the length of upright crotch is preferably in 200～500mm.

And, omit the part of explanation in the above-mentioned embodiment and the important document that only has in one embodiment also can suitably be used for other embodiment respectively, and the important document in each embodiment is phase double replacement between embodiment suitably also.

The present invention's (the 1st and the 2nd scheme) though the disposable diaper lower limb of excessively not tying tight also can prevent leakage around the lower limb, and baby's foot can easily pass through leg opening part when wearing diaper, can easily be through on one's body the baby.Though disposable diaper of the present invention is not limited to low monthly age youngster, is specially adapted to low monthly age youngster, and has the advantage on the body of the neonate that is through easily under the recumbency state etc.

(A) embodiment of the 1st scheme

＜embodiment 1 〉

Made the disposable diaper of Fig. 1～mode shown in Figure 3.

The size and the physical parameter of each one are illustrated in the table 1.

Table 1

??L1	????L2	?L1/L2	??L3	????L1/L3	?L4	?S1	?S2	?S1/S2	The elongation load of shank rivel
??L1	????L2	?L1/L2	??L3	????L1/L3	?L4	?S1	?S2	?S1/S2	The elongation load of shank rivel	??160mm	????85mm	?1.9	??70mm	????2.3	?205	?13.8	?29.7	?0.46	200cN/cm

＜comparative example 1 〉

Is 1.5 except that making above-mentioned than (L1/L2), other and embodiment 1 made in the same manner diaper (L1=160mm, L2=107mm).

＜reference example 〉

Except that make above-mentioned than (L1/L2) for the 2.3mm, other and embodiment 1 made in the same manner diaper (L1=160mm, L2=107mm).

＜performance evaluation 〉

In order to following method each disposable diaper is estimated its (1) to the neonatal easiness of wearing respectively; (2) prevent to urinate performance from spilling between thigh.The result is illustrated in the table 2.

(1) Chuan Zhe easiness (evaluation of the easy degree that foot passes through)

[evaluation methodology]

With above-mentioned wearing method each diaper is worn on one's body the neonate model (lower limb bends to the model of ㄑ font under static condition), estimates the easy degree of passing through when the state of lying down is got a foothold by leg opening part.

(evaluation criterion)

If foot by the time easily then be zero, if be difficult to by for *.

What is called by being meant that bipod all passes through easily, is particularly also passed through by later another foot at a foot easily smoothly.What is called be difficult to by be meant two feet all be difficult to by, but particularly after a foot passes through, the another foot by the time be difficult to by.

(2) prevent to urinate the performance (mensuration of thigh leakage value) of leaking from thigh

[evaluation methodology]

Diaper is worn on the low monthly age model (can inject artificial urine from the hip portion that works as, be the model of the low monthly age youngster's of simulation waist on the form), measures the thigh leakage value in order to following method.

When measuring the thigh leakage value, at first diaper is worn on the above-mentioned low monthly age model, lean to one side to place for 90 ° earlier, fall 45 ° to back one side in this state.Inject the 30g artificial urine by pipe with the speed of 5g/ second, inject whether seepage of back visual examination.If do not have seepage then use the same method again to inject the 40g artificial urine, carry out such operation repeatedly till seepage occurring.The amount of the artificial urine of then, will the total when observing the oozing out of urine injecting is as the thigh leakage value.

Table 2

	Embodiment 1	Comparative example 1	Reference example
	Embodiment 1	Comparative example 1	Reference example	Foot pass through easy degree	Zero bipod is by easy	Zero bipod is by easy	* bipod is by difficult
Leakage value between thigh (g)	??180g	??120g	??120g	Foot pass through easy degree	Zero bipod is by easy	Zero bipod is by easy	* bipod is by difficult

Can judge that from the result shown in the table 2 the disposable diaper baby's of embodiment 1 foot passes through easily, and be difficult to leak from thigh.Though and the diaper baby's of comparative example 1 foot passes through easily, huckle is easy to generate the gap, leaks easily.Though the diaper of reference example is difficult to leak, at a foot by back another foot by difficulty, the foot that therefore is judged to be the baby be difficult to by.

(B) embodiment of the 2nd scheme

＜embodiment 2 〉

Made the disposable diaper of Fig. 3, Figure 6 and Figure 7 mode.

The size and the physical parameter of each one are illustrated in the table 1.

Table 3

??L1	??L3	L1/L3	?S1	?S2	??S1/S2
??L1	??L3	L1/L3	?S1	?S2	??S1/S2	??160mm	??70mm	2.3	?13.8cm ²	?29.8cm ²	??0.46
Waist portion elongation load	Waist elongation load	Shank rivel elongation load	Absorber rigidity (diaper width)		??L4	??160mm	??70mm	2.3	?13.8cm ²	?29.8cm ²	??0.46
Waist portion elongation load	Waist elongation load	Shank rivel elongation load	Absorber rigidity (diaper width)		??L4	??85cN	??160cN	95cN	????16.4cN/50mm		??205mm

＜comparative example 2 〉

Except that the elongation stress that makes above-mentioned waist portion was 200cN, other and embodiment 2 had made diaper in the same manner.

＜comparative example 3 〉

Above-mentioned than (L1/L3) and above-mentionedly be followed successively by 3.0 and 0.35 than (S1/S2) except that making, other and embodiment 2 have made disposable diaper in the same manner.

＜performance evaluation 〉

In order to following method each diaper of embodiment 2 and comparative example 2,3 is estimated its (3) landing performance of wearing easiness and (4) diaper to low monthly age youngster respectively.The result is illustrated in the table 4.

(3) Chuan Zhe easiness

[evaluation methodology]

With above-mentioned wearing method each diaper is worn on one's body the low monthly age youngster model (lower limb bends to the model of ㄑ font under static condition), puies forward easy degree on when estimating passing through easy degree and under the recumbency state, up carrying diaper when the recumbency state is got a foothold by leg opening part by the back.

(evaluation criterion)

If foot passes through easily when wearing, it is easy to mention diaper thereafter, then is zero; If foot by difficulty but to mention diaper easy, then be △, if foot by difficult and on put forward difficulty, then be *.

(4) landing performance

[evaluation methodology]

Each diaper is worn on one's body the low monthly age youngster model (lower limb bends to the model of ㄑ font under static condition), makes the circumferential edges of waist opening portion and the position consistency of umbilicus, model's chest is fixed on the laboratory table.The landing amount (leaving the distance of umbilicus) of diaper when mensuration catches bipod to carry out lifting foot for 20 times and pedaling foot (the low distinctive action of monthly age youngster).

Table 4

	Embodiment 2	Comparative example 2	Comparative example 3
	Embodiment 2	Comparative example 2	Comparative example 3	Wear easiness	????○	????×	????△
The landing amount	????10mm	????10mm	????20mm	Wear easiness	????○	????×	????△

Can know that from the result of table 4 disposable diaper of embodiment 2 allows low monthly age youngster's foot pass through easily, and on easy under the recumbency state, carry, be not easy landing.Relative therewith, can be not easy landing though judge the diaper of comparative example 2, but the difficulty that wears, the diaper of comparative example 3 difficulty that wears, landing easily.

Claims

1. disposable diaper, it is the absorber that possesses liquid retainability, comprise veutro portion, lower crotch and drosal part, and be formed with the pull-on disposable diaper of waist opening portion and a pair of leg opening part, it is characterized in that, hip when the minima L1 of width be positioned at this hip when width for the some P on the minimum edge of opening position, above-mentioned each leg opening part to the end points Q of veutro portion one side of this edge of opening along diaper longitudinally the ratio (L1/L2) of distance L 2 be 1.7～2.2.

2. disposable diaper as claimed in claim 1 is characterized in that, above-mentioned hip when the minima L1 of width with from above-mentioned P point to the diaper by above-mentioned end points Q longitudinally the ratio (L1/L3) of the distance L 3 of imaginary line La be 2.0～2.5.

3. disposable diaper as claimed in claim 1 or 2, it is characterized in that, if connecting the area in the zone that edge of opening surrounded of the imaginary line Lb of above-mentioned some P and above-mentioned end points Q and above-mentioned leg opening part is S1, the area in above-mentioned two zones of the diaper by this P when the area in imaginary line Lc, the zone that surrounded with the imaginary line Ld and the above-mentioned imaginary line Lb of this imaginary line Lc orthogonal and the diaper width by above-mentioned end points Q is S2 longitudinally is 0.45～0.55 than (S1/S2).

4. as any one the described disposable diaper in the claim 1～3, it is characterized in that, in the waist portion of above-mentioned veutro portion and above-mentioned drosal part, have along the flexible pars contractilis of the width of diaper, be formed with the shank rivel at above-mentioned leg opening part along its edge of opening, a part that forms the elastic component that this shank rivel uses extends in the pars contractilis of the above-mentioned waist portion in above-mentioned veutro portion and/or the above-mentioned drosal part.

5. as any one the described disposable diaper in the claim 1～4, it is characterized in that, be formed with the shank rivel at above-mentioned leg opening part along its edge of opening, the tensile load when making the position that has formed this shank rivel be elongated to the maximum elongation rate to deduct 20% percentage elongation is 100～250cN/cm.

6. as any one the described disposable diaper in the claim 1～5, it is characterized in that, be formed with the shank rivel along its edge of opening, vertically be formed with at least one pair of stereo enclosure along diaper in both sides longitudinally at diaper at above-mentioned leg opening part.

7. disposable diaper, it is the absorber that possesses liquid retainability, comprise veutro portion, lower crotch and drosal part, and be formed with the pull-on disposable diaper of waist opening portion and a pair of leg opening part, it is characterized in that, waist portion circumferentially has retractility along it, and the end line of the length direction of above-mentioned absorber is 50～150cN to the zone of the last end line of above-mentioned leg opening part along 50% o'clock the tensile load that the width of diaper is elongated to the maximum elongation rate in this waist portion; Hip when the minima L1 of width be positioned at this hip when width be 2.0～2.5 for the some P on the minimum edge of opening position, above-mentioned each leg opening part to the ratio (L1/L3) of the distance L 3 of the La of imaginary line longitudinally of the diaper of the end points Q of veutro portion one side by this edge of opening;

If connecting the area in the zone that edge of opening surrounded of the imaginary line Lb of above-mentioned some P and above-mentioned end points Q and above-mentioned leg opening part is S1, the area in above-mentioned two zones of the diaper by this P when the area in imaginary line Lc, the zone that surrounded with the imaginary line Ld and the above-mentioned imaginary line Lb of this imaginary line Lc orthogonal and the diaper width by above-mentioned end points Q is S2 longitudinally is 0.45～0.55 than (S1/S2).

8. disposable diaper as claimed in claim 7 is characterized in that above-mentioned waist circumferentially has retractility along it, and making this waist is 100～250cN along 50% o'clock the tensile load that the width of diaper is elongated to the maximum elongation rate.

9. as claim 7 or 8 described disposable diapers, it is characterized in that, its edge of opening is formed with the shank rivel in above-mentioned leg opening part upper edge, and making 50% o'clock the tensile load of this shank rivel along the longitudinal tensile strain of diaper to the maximum elongation rate is 50～200cN.

10. the wearing method of claim 1 or 7 described disposable diapers, it is characterized in that, a hands is inserted a leg opening part, catch wearer's a foot with this hands, from this leg opening part this foot is pulled out, the another foot is pulled out from another leg opening part equally, then will mention wearer's waist on this diaper, thus disposable diaper is worn on one's body the wearer of recumbency state.