CN104095712A

CN104095712A - Disposable diaper

Info

Publication number: CN104095712A
Application number: CN201410143828.2A
Authority: CN
Inventors: 山中康弘; 坂口智
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2013-04-10
Filing date: 2014-04-10
Publication date: 2014-10-15
Also published as: JP2014204754A; JP6181407B2

Abstract

The present invention provides a raised disposable diaper which can protect the navel of a wearer and cover the abdomen of the wearer simultaneously. The front notch parts (31) are arranged in a front waistline area, in the center in a product width direction, and in the area comprising the end parts in a product length direction, and the back notch parts (32) are arranged in a back waistline area, in the center in the product width direction, and in the area comprising the end parts in the product length direction. The back notch parts are separated from a waistline keeping part at the positions closer to the outside of the product width direction than the waistline keeping part.

Description

Disposable diaper

Technical field

The present invention relates to a kind of disposable diaper.

Background technology

In the past, be known to following disposable diaper: it has Attacking Midfielder's region, low back region and lower crotch region, and this disposable diaper is formed with pair of leg and encloses peristome, and possess across the lower crotch region absorber that also waistline region and low back region extend forward.

Conventionally, because the skin surface of child's's (especially neonate) umbilicus part is dry and state in similar wound, if therefore the end in the product length direction of disposable diaper and this child's umbilicus part are collided, likely injure this child's umbilicus part or make child feel pain.

Thereby; in this disposable diaper; in order to protect so responsive child's umbilicus; be known to following structure: in Attacking Midfielder's region of disposable diaper, be formed with notch part; this notch part has and is the U font of convex, the shape of V-shape (for example,, with reference to patent documentation 1 and 2) towards the product width direction Shang center of disposable diaper.

Patent documentation 1: Japanese kokai publication hei 1-162806 communique

Patent documentation 2: Japanese kokai publication sho 62-199802 communique

Summary of the invention

the problem that invention will solve

Conventionally, baby's abdominal part is outstanding around, and in the case of on the anterior end of disposable diaper is positioned at the protuberance of abdominal part, the protuberance of abdominal part likely cannot be covered rightly by disposable diaper.In order to cover rightly the protuberance of abdominal part in protection wearer's umbilicus; consider to have in the disposable diaper with connecting band, to make the fixed position of connecting band be positioned crotch side and width inner side, and wearing this disposable diaper Attacking Midfielder's region is carried to one side state of side stretching outside width on one side.

If wearing this disposable diaper Attacking Midfielder's region is carried on one side to the state of side stretching outside width on one side, Attacking Midfielder's region of disposable diaper protuberance configuration along wearer's abdominal part in protection wearer's umbilicus by making notch part to the expansion of width outside.But, because the low back region of disposable diaper is stretched by waistline area side forward, therefore likely cause this low back region in being close to the state on health, thereby cause wearing feeling to worsen.

Therefore, the present invention be exactly Given this situation of planting complete, its object is to provide a kind of disposable diaper that can cover rightly the protuberance of wearer's abdominal part in protection wearer's umbilicus.

for the scheme of dealing with problems

The purport of the disposable diaper (disposable diaper 10) of the 1st technical scheme of the present invention is, this disposable diaper comprises: Attacking Midfielder's region (Attacking Midfielder's region 20), low back region (low back region 30), lower crotch region (lower crotch region 25) between above-mentioned Attacking Midfielder's region and above-mentioned low back region, product length direction (product length direction L) from above-mentioned Attacking Midfielder's region towards above-mentioned low back region, with the mutually orthogonal product width direction (product width direction W) of the said goods length direction, step up and state lower crotch region and the absorber at least one extension in above-mentioned Attacking Midfielder's region and above-mentioned low back region, in above-mentioned Attacking Midfielder's region and above-mentioned low back region, extend and disposable diaper be held in the waistline maintaining part of wearer's health along product width direction, and outside is extended and is fixed on a pair of connecting band (connecting band 90) in above-mentioned Attacking Midfielder's region from above-mentioned low back region to product width direction, in above-mentioned Attacking Midfielder's region, the region that is positioned at the said goods width Shang center and comprises the end on the said goods length direction, be formed with front notch part (front notch part 31), in above-mentioned low back region, the region that is positioned at the said goods width Shang center and comprises the end on the said goods length direction, be formed with rear notch part (rear notch part 32), above-mentioned rear notch part is set as and is separating with above-mentioned waistline maintaining part by the position in the outside of above-mentioned product length direction than above-mentioned waistline maintaining part.

The purport of the disposable diaper of the 2nd technical scheme of the present invention is, is provided with at least pars contractilis flexible on the said goods width between above-mentioned rear notch part and above-mentioned waistline maintaining part.

The purport of the disposable diaper of the 3rd technical scheme of the present invention is, the length on the said goods width of the above-mentioned absorber of Length Ratio on the said goods width of above-mentioned pars contractilis is long.

The purport of the disposable diaper of the 4th technical scheme of the present invention is, under the elongation state of above-mentioned disposable diaper, the anterior end of above-mentioned disposable diaper is obtuse angle with the angle that the sidepiece extending along the said goods length direction from above-mentioned anterior end at above-mentioned front notch part forms, and the rear end of above-mentioned disposable diaper is acute angle with the angle that the sidepiece extending along the said goods length direction from above-mentioned rear end at above-mentioned rear notch part forms.

The purport of the disposable diaper of the 5th technical scheme of the present invention is, under the elongation state of above-mentioned disposable diaper, length on the said goods length direction of above-mentioned front notch part is 10mm～30mm, and the length on the said goods length direction of above-mentioned rear notch part is 3mm～15mm.

The purport of the disposable diaper of the 6th technical scheme of the present invention is, the length on the said goods length direction of the above-mentioned rear notch part of Length Ratio on the said goods length direction of above-mentioned front notch part is long.

The purport of the disposable diaper of the 7th technical scheme of the present invention is, in above-mentioned absorber, mode with the rear end that comprises above-mentioned absorber is formed with low rigid portion, in this low rigid portion, there is not the absorbent core that forms above-mentioned absorber, or, in this low rigid portion, the weight per unit area of above-mentioned absorbent core is lower than the weight per unit area of other parts, and above-mentioned rear notch part is disposed at the position by the outside of above-mentioned product length direction than above-mentioned low rigid portion.

the effect of invention

A kind of disposable diaper that covers rightly the protuberance of wearer's abdominal part in protection wearer's umbilicus can be provided.

Brief description of the drawings

Fig. 1 is the expansion top view of the disposable diaper of present embodiment.

Fig. 2 is the cutaway view along the disposable diaper of the F1-F1 line shown in Fig. 1.

Fig. 3 is the cutaway view along the disposable diaper of the F2-F2 line shown in Fig. 1.

Fig. 4 is the figure that schematically shows the wearing effect of disposable diaper.

Fig. 5 is the enlarged drawing of the product length direction outboard end of the disposable diaper in the expansion top view shown in Fig. 1.(a) of Fig. 5 represents the rear end of disposable diaper, and (b) of Fig. 5 represents the anterior end of disposable diaper.

Fig. 6 is the figure that schematically shows the deformation state of rear notch part.(a) of Fig. 6 represents the state before distortion, and (b) of Fig. 6 represents the state after distortion.

Detailed description of the invention

Then, with reference to the accompanying drawings of the embodiment of disposable diaper of the present invention.In addition, in the record of the following drawings, same or similar part is marked to same or similar Reference numeral.But what should be careful is that accompanying drawing is schematic figure, the ratio of each size etc. are different from material object.

Thereby concrete size etc. should judge with reference to the following description.In addition, also comprise each other the different part of relation, ratio between size each other at accompanying drawing.

Fig. 1 is the expansion top view of the disposable diaper 10 of present embodiment.Fig. 2 is the cutaway view along the disposable diaper 10 of the F1-F1 line shown in Fig. 1.Fig. 3 is the cutaway view along the disposable diaper 10 of the F2-F2 line shown in Fig. 1.Expansion top view shown in Fig. 1 is the elastic component 71 of lower limb pars contractilis 75 and lower limb side rivel portion 80 to be stretched to form topsheet 50, the flank 70 etc. of disposable diaper not to be formed with the figure of the state till the state of fold.

Disposable diaper 10 has Attacking Midfielder's region 20, lower crotch region 25 and low back region 30.Attacking Midfielder's region 20 is the parts that contact with wearer's front waist portion (abdominal part).In addition, low back region 30 is the parts that contact with wearer's rear waist portion (back).Lower crotch region 25 is between Attacking Midfielder's region 20 and low back region 30.

In addition, be formed with pair of leg at disposable diaper 10 and enclose peristome 35.Lower limb encloses peristome 35 and is located at the side end in the product width direction of disposable diaper, is the part of enclosing configuration under the state after disposable diaper is worn by wearer along wearer's lower limb.

In addition, in the present embodiment, the past waistline region 20 is called to product length direction L towards the direction of low back region 30, will be called product width direction W with the mutually orthogonal direction of product length direction L.

Disposable diaper 10 possesses across lower crotch region 25 and from lower crotch region 25 absorber 40 of at least one extension in waistline region 20 and low back region 30 forward.Absorber 40 is made up of absorbability core 40a and core cladding 40b.

Absorbability core 40a is identical with disposable diaper in the past, can use the known member such as Time of Fluff Slurry, superabsorbent polymer, material suitably to form.Absorbability core 40a is wrapped up by the core cladding 40b of sheet.

Core cladding 40b is the sheet material for covering absorbability core 40a.A part at least skin surface side of core cladding 40b is made up of various fabric nonwoven cloths or the napkin with liquid permeability.For example, can applying unit area weight be 10g/m roughly ²～30g/m ²hot blast fabric nonwoven cloth, spun bond nonwoven fabric, SMS(spunbonded type-meltblown-spunbonded type) non-woven fabrics or weight per unit area be 10g/m roughly ²～30g/m ²napkin.

Possesses the topsheet 50 of liquid permeability in the face side (skin bearing surface side) of absorber 40.In addition possesses, the back sheet 60a of non-liquid permeability in the rear side (non-skin bearing surface side) of absorber 40.

Side edge part on the product width direction W of absorber 40 possesses respectively flank 70.Flank 70 is made up of 1 non-woven fabrics or stacked two above multi-disc non-woven fabrics.In addition, possesses respectively connecting band 90 at a pair of flank 70 places.

Connecting band 90, by extend and be fixed in the non-skin bearing surface of Attacking Midfielder's region 20 along product width direction W in low back region 30, is held in disposable diaper 10 on wearer's health.

Target portion 95 is disposed at the non-skin bearing surface in Attacking Midfielder's region, is configured to for fixing respectively a pair of connecting band 90.

In the present embodiment, utilize Attacking Midfielder's region 20, low back region 30 and connecting band 90 to form waistline maintaining part.The waistline maintaining part of low back region 30 is positioned at the region of the fastened component from being provided with connecting band 90 along the scope of width extension.The waistline maintaining part of Attacking Midfielder's region 20 is positioned at the scope that extend along width in the region from being provided with target portion 95.In Fig. 1, so that the mode of waistline maintaining part mark oblique line is represented.

In addition, disposable diaper 10 possesses crotch pars contractilis 200, and this crotch pars contractilis 200 configures and is formed in the equitant region of absorber with lower crotch region 25, and can on product length direction L, stretch.Specifically, crotch pars contractilis 200 is disposed at lower crotch region 25.In addition, in aftermentioned, describe the structure of crotch pars contractilis 200 in detail.

The face side (topsheet 50 sides) of absorber 40 possesses pair of leg pars contractilis 75, and this pair of leg pars contractilis 75 is formed at lower limb and encloses peristome 35 around, and can on product length direction L, stretch.

Lower limb pars contractilis 75 is longer than crotch pars contractilis 200 on product length direction L, and is arranged on than crotch pars contractilis 200 position in the outer part on product width direction W.

As long as lower limb pars contractilis 75 is configured to, can to make lower limb enclose peristome 35 flexible in product length direction, and it both can enclose peristome 35 along lower limb and configures, and also can enclose for lower limb the state configuration that peristome 35 tilts with Local Phase.

In addition, lower limb pars contractilis 75 is parts of utilizing Stretchable sheet etc. to shrink in product length direction in fact, conceptively refers to that the state configuration except not playing a role with contractility has the part the part of Stretchable sheet.In addition, in aftermentioned, explain the structure of lower limb pars contractilis 75.

Notch part 31 and rear notch part 32 before disposable diaper is formed with.Waist is outstanding backward from the anterior end 10F of disposable diaper for front notch part 31.Front notch part 31 is formed at the region of the end in the product length direction that is positioned at product width direction Shang center and comprise disposable diaper in Attacking Midfielder's region.Because front notch part 31 is formed as the product width direction Shang center across disposable diaper, therefore wear the auxiliary width center that notch part 31 is held Attacking Midfielder's region for labelling in the past.Thus, in the time wearing disposable diaper, Attacking Midfielder's region correctly can be connected to wearer's abdominal part.

Rear notch part 32 is formed at the region of the end in the product length direction that is positioned at the product width direction Shang center of disposable diaper and comprise disposable diaper in low back region.Waist is outstanding forward from the rear end 10R of disposable diaper for rear notch part 32.Because rear notch part 32 is formed as the product width direction Shang center across disposable diaper, therefore wear the auxiliary width center that notch part 32 is held low back region for labelling later.Thus, in the time launching disposable diaper and make wearer be positioned on this disposable diaper, can easily wearer's buttocks be disposed to correct position.Notch part is described in aftermentioned.

In addition, possesses the pair of leg side rivel portion 80 of extending along product length direction L in the inner side of pair of leg pars contractilis 75 (central authorities partially on product width direction W).Lower limb side rivel portion 80 is located at the medial end in the product width direction of flank 70, is to be disposed at the flexible rivel by the erecting property of the position of product width direction inner side than lower limb pars contractilis 75.Lower limb side rivel portion 80 is disposed at the position by product width direction inner side than lower limb pars contractilis 75.Lower limb side rivel portion 80 can adopt well-known structure in the past, specifically, also can utilize the sheet material that is different from flank 70 to form lower limb side rivel portion 80.

The medial end of flank 70 in product width direction turns back also stacked for double-deck to surficial sheets side.Between this double-deck flank 70, be provided with elastic component 71(with reference to Fig. 2 with the state alongst extending).This flank 70 forms lower limb side rivel portion 80 with elastic component 71.

Lower limb side rivel portion 80 has the bonding part 81 engaging with topsheet 50 or back sheet 60a and the free end portion 82 that disposes elastic component.Length direction middle body in free end portion 82, that be contained in lower crotch region 25 utilizes elastic component 71 to shrink in product length direction, thereby forms contraction flow region 84.Lower limb side rivel portion 80 erects bonding part 81 as base end part in the time wearing, and the contraction flow region 84 of free end portion 82 contacts with wearer's skin as apex., bonding part is formed as the base end part erecting of lower limb side pars contractilis.

In addition, contraction flow region 84 is parts of utilizing elastic component 71 to shrink in product length direction in fact, the position the conceptive part that refers to the flexible member 71 of the state configuration except not playing a role with contractility.In addition, in Fig. 2, in lower limb side rivel portion, with to flank 70 and topsheet 50(or back sheet 60a etc.) bonding part 81 that the engages mode that marks oblique line represents.

Bonding part 81 is provided with multiple, and the 1st bonding part 81A is disposed at the position by product length direction outside than contraction flow region 84, and the 2nd bonding part 81B is disposed at the position by product width direction outside than contraction flow region 84.Thus, lower limb side rivel portion 80 is configured to middle body in the product length direction being contained in lower crotch region 25 to edge-on of wearer.

In the bonding part 81 of lower limb side rivel portion 80, be disposed at than contraction flow region 84 and engage with topsheet 50 by the 1st bonding part 81A of the position in product length direction outside.

In the bonding part 81 of lower limb side rivel portion 80, be disposed at than contraction flow region 84 and be disposed between crotch pars contractilis 200 and lower limb pars contractilis 75 on product width direction W by the 2nd bonding part 81B of the position in product width direction outside.In the total length of the 2nd bonding part 81B in product length direction with back sheet 60a(at local and outer packaging sheet 60) engage.In addition, back sheet 60a is disposed between absorber 40 and outer packaging sheet 60, plays a role as leakproof sheet material.

In addition, the bonding part 81 of lower limb side rivel portion 80 can adopt various structures.Bonding part can be both for example from the lower crotch part that waistline region and low back region extend and engage with topsheet forward in product length direction, also can be in the part engaging with the back sheet of non-liquid permeability, outer packaging sheet by the position in width outside than absorbability core 40a, and be configured to the base end part erecting.

In addition, lower limb side rivel portion, as long as being disposed at the rivel by the erecting property of product width direction inner side than lower limb pars contractilis, is not limited to said structure, certain, can adopt the structure of well-known lower limb side rivel portion in the past.

In addition, between a pair of connecting band in product width direction, be provided with can be flexible in product width direction waistline pars contractilis 85.Waistline pars contractilis 85 shrinks on width between connecting band.

In the present embodiment, waistline pars contractilis 85 is made up of Stretchable sheet.There is no particular determination for the member that forms waistline pars contractilis 85, but preferably use as far as possible member thin and that flexural rigidity is lower, contracting amplitude-frequency is less.By adopting flexural rigidity form waistline pars contractilis 85 and can make waistline pars contractilis 85 be easy to along health bending compared with low material, can apply under the prerequisite of load and make waistline pars contractilis 85 along health laminating at the health to wearer not.In addition, form waistline pars contractilis 85 by employing contracting amplitude-frequency compared with little material and the contraction in product length direction of disposable diaper can suppress disposable diaper and extend in the situation that in product width direction, can suppress at wearer's waistline place disposable diaper by the drop-down situation of crotch side.

In the present embodiment, as waistline pars contractilis 85, used weight per unit area for 20g/m ²～45g/m ²retractility thin film.

Waistline pars contractilis 85, after 1.5 times～2.5 times of the length being stretched under non-elongation state (naturalness), utilizes hot-melt adhesive or heat treated etc. to be adhered to outer packaging sheet 60.

In the present embodiment, waistline pars contractilis 85 is disposed between outer packaging sheet 60 and back sheet 60a.But in the structure of extending to product length direction outside than absorbability core 40a at core cladding 40b, waistline pars contractilis 85 also can be disposed between core cladding 40b and back sheet 60a or outer packaging sheet 60.Position for waistline pars contractilis there is no particular determination.But preferred disposition is in the position by non-skin bearing surface side than absorber 40.In addition,, in the region that does not configure absorber, waistline pars contractilis 85 also can be disposed between flank 70 and back sheet 60a or outer packaging sheet 60.

Waistline pars contractilis 85 is disposed at than rear notch part 32 position of crotch region side on the lower in low back region.The rear end of waistline pars contractilis 85 is positioned at than the position of rear notch part 32 forward sides, and the anterior end of waistline pars contractilis 85 is disposed at than the rear end of the absorber position of crotch region side on the lower.Thereby waistline pars contractilis 85 is overlapping with absorber part.

In addition, the waistline pars contractilis of present embodiment is configured in product width direction flexible, flexible but waistline pars contractilis also can be configured in product width direction and product length direction.

Be provided with as weight per unit area lower or do not have a low rigid portion 110 of the low rigid region of absorbability core 40a than the weight per unit area at other positions of absorber at the absorber 40 of low back region.Low rigid portion 110 is the shape that shortens gradually the length product width direction from the product width direction mediad Attacking Midfielder region side of the end of the low back region side of absorber 40.More particularly, the top view of disposable diaper is wedge-type shape.In addition, absorbability core 40a's and low rigid portion 110 between border be formed as being towards product width direction W Shang center the circular arc of convex.Be the trapezoidal shape that is convex towards the end of low back region side than low rigid portion 110 by the absorber 40 of the position in product width direction outside.

In the top view of disposable diaper, the local configuration of low rigid portion 110 is overlapping with waistline pars contractilis 85.In addition, in the present embodiment, waistline pars contractilis 85 is configured to the part of low rigid portion 110 overlapping, and the entirety that still also can be configured to low rigid portion 110 and waistline pars contractilis 85 is overlapping.

By forming so low rigid portion 110, even waistline pars contractilis 85 is shunk in the case of not hindering waistline pars contractilis 85 flexible, because low rigid portion 110 narrows and narrows by the interval between the absorber of product width direction both sides than low rigid portion 110, therefore absorber 40 is difficult to be the shape protuberance outside expectation.In addition, prevent Excreta seepage if consider, the width of preferred low rigid portion 110 is narrower than the width of waistline pars contractilis 85.

In addition, absorber 40 utilizes waistline pars contractilis 85 and shrinks on product width direction W, in the time narrowing by the interval between the absorber of product width direction both sides than low rigid portion 110, the position by the end of low back region 30 sides of low rigid portion 110 than the position of crotch region 25 on the lower significantly near product width direction W central authorities, therefore produce the poor of the amount of contraction that has on product width direction W at the position of low back region 30 sides and the position of crotch region 25 on the lower, thereby low back region 30 is erected.

,, owing to having the low rigid portion 110 of waistline pars contractilis 85 and wedge shape that can be flexible on product width direction W, therefore, in the time wear disposable diaper 10, disposable diaper 10 is easy to form the cup-shaped of swelling in non-skin surface side.

In addition, in the present embodiment, owing to being that low rigid portion 110 does not exist under the prerequisite of absorbability core 40a there is waistline pars contractilis 85 with the equitant mode of low rigid portion 110, therefore the position by the end of low back region 30 sides on product length direction L than the end position of absorbability core 40a significantly near product width direction W central authorities, thereby erecting of low back region 30 becomes more obvious, therefore can more stably form cup-shaped.

In the present embodiment, because waistline pars contractilis 85 arranges in the mode that exceeds the lateral margin on the product width direction W of absorbability core 40a, therefore can on one side disposable diaper 10 be formed as to cup-shaped, make on one side by the absorbability core 40a of the position of the end side of low back region 30 sides on product length direction L energetically along wearer's health.And then at least a portion of waistline pars contractilis 85 and low rigid portion 110 is present in the region of extending along width from a pair of connecting band 90.Thus, even so that wearer lies on the back and when disposable diaper 10 is laid on to state under body and wears disposable diaper 10, also can not be laid down under wearer's health to exceed the waistline pars contractilis 85 that the mode of the lateral margin on the product width direction W of absorbability core 40a exists.Thereby, by stretching connecting band 90, the lateral margin of waistline pars contractilis 85 is extended, be easy to make the position by waist side of cup-shaped more reliably along health.

In the present embodiment, be the convex form towards low back region side than low rigid portion 110 by the absorbability core 40a in product width direction outside.Therefore, as mentioned above, disposable diaper 10 is easy to form in non-skin surface side the cup-shaped of protuberance, in addition, owing to having maintained the surface area of absorbability core 40a, therefore can prevent Excreta self-absorption core 40a seepage.

In the present embodiment, low rigid portion 110 is wedge shape, absorbability core 40a's and low rigid portion 110 between border be the circular arc that is convex towards lower crotch region 25.In addition, the radius of circular arc is 50mm～200mm.Therefore, because the width on the product width direction W of low rigid portion 110 is along with the end of low back region 30 sides near on product length direction L but not linear increase, erecting further obviously of low back region 30, is therefore easy to more stably form cup-shaped.And then, due to absorbability core 40a's and low rigid portion 110 between border be the circular arc that is convex towards lower crotch region 25, therefore low back region 30 utilizes the contraction of low rigid portion 110 and is formed as the cup-shaped with curvature, thereby is formed as being easy to the shape along wearer's the buttocks with curvature.

In addition,, by being formed with low rigid portion 110, be formed with respectively the convex form towards posterior region side in left and right in the end of the low back region side of absorber 40.Expect diaper to be dressed in buttocks because this absorber shape makes people, therefore there is the effect that makes user more be easy to diaper to be dressed in wearer tram with it.

And by being provided with low rigid portion 110, the thickness of absorber is to the rear end attenuation of absorber.Thus, the product width direction central authorities of the rear end of absorber become and are more easy to along health.

In addition, be provided with as weight per unit area lower or do not have a low rigid portion 111 of the low rigid region of absorbability core 40a than the weight per unit area at other positions of absorber at the absorber 40 of Attacking Midfielder's region.Low rigid portion 111 is the shape that shortens gradually the length product width direction from the product width direction mediad low back region side of the end of Attacking Midfielder's region side of absorber 40.

By being provided with low rigid portion 111, the thickness of absorber is to the anterior end attenuation of absorber.Thus, connecting band 90 is being fixed under the state of target portion 95, the product width direction central authorities of the anterior end of absorber become and are more easy to along health.

Flexural rigidity in present embodiment is the values of stiffness based on (JISP8125) obtaining according to Taber method (Japanese: テーバー method) and utilizes following method to measure.First, under the state that disposable diaper is launched, gather the sample (for example, absorber) of the measuring object part of flexural rigidity.With regard to measuring object part, sample is made as to the size of the length 38mm in the length 70mm × product length direction in product width direction.In the situation that is to contain telescopic resilience member in sample, remove in advance elastic component.In addition, use (strain) peace field essence mechanism to make made Taber rigidity testing instrument (Japanese: テーバースティ Off ネステスター) for measuring the testing machine of values of stiffness.In addition, sample size is 10, by each sample is measured using this meansigma methods as values of stiffness.

The order of measuring is as following (a)～(e).

(a) thickness (A) of the sample that measurement gathers.

(b) then, sandwich sample with the degree contacting with the center of the chuck (downside) of testing machine.

(c) summation in the gap, left and right between backing roll and sample is adjusted to (A) × 0.80(mm).

(d) so that the mode that instruction load scale enters in 15%～85% scope of maximum scale is selected auxiliary counterweight rightly.

(e) make sample to the left and right two direction rotations until the 15 degree supporting groove point places consistent with the center scale of pendulum stop, reading the scale of testing machine.The numerical value in the left side of scale is made as to (B), the numerical value on the right side of scale is made as to (C).

Values of stiffness utilizes following formula to try to achieve.

Formula: values of stiffness (mNm)=(((B)+(C))/2) × (auxiliary counterweight coefficient) × 9.81 × 10 ^-2

In addition, in the case of gathering the test film that width is 38mm, carry out to the conversion of the bending moment of 38mm width.

Like this, the values of stiffness of measurement is higher, and flexural rigidity is higher, and values of stiffness is lower, and flexural rigidity is lower.

Connecting band 90 is installed in the region corresponding with low back region 30 of flank 70.Connecting band 90 possesses and is linked to the substrate sheet 91 of flank 70 and is provided with the clamping hooked (not shown) as multiple fastened components and is fixed on the hook sheet material 92 of substrate sheet 91.Hook sheet material 92 is for being provided with the region of fastened component, and above-mentioned waistline maintaining part is the region of extending along width from hook sheet material 92.

Hook sheet material 92 is fixed on substrate sheet 91, specifically for to engage with substrate sheet 91.Preferably between hook sheet material 92 and substrate sheet 91, engage to carry out without the mode that exceeds needs and improve the rigidity of connecting band 90.Specifically, preferably hook sheet material 92 utilizes the hot-melt adhesive of the such coating at intermittence of point-like, wire or helical form to engage with substrate sheet 91.In addition, hook sheet material 92 also can utilize heat-sealing etc. to engage with substrate sheet 91.

Substrate sheet 91 is made up of 1 non-woven fabrics or overlapping two above multi-disc non-woven fabrics.As substrate sheet 91, can use the non-woven fabrics that utilizes the method for making manufacture such as spunbonded type (SB) or spunbonded type-meltblown-spunbonded type (SMS) to form.The weight per unit area (being summation unit area weight in the situation of multi-disc) that forms the non-woven fabrics of substrate sheet 91 is 30g/m ²～120g/m ², be preferably 40g/m ²～90g/m ².

Target portion 95 is located on the face of non-skin butt side of the outer packaging sheet 60 of Attacking Midfielder's region.Target portion 95 is configured to the clamping hooked of connecting band and fastens, and plays a role as the ring in the engaging system of hook and ring.As target portion, for example, can use hot-wind nonwoven cloth.

Target portion 95 can be used the fabric nonwoven cloth that is for example made by the thermoplastic synthetic resin fiber of polyolefin or the thermoplastic synthetic resin thin film of polyolefin.In addition, the ring that is installed on target portion can be formed by the thermoplastic synthetic resin of polyolefin.

And then, as target portion 95, can use fluffy non-woven fabrics, also can be with the non-woven fabrics that prevents nonwoven surface fluffing by its part being carried out to embossing.

In addition, also can by utilize non-woven fabrics to form the outer packaging sheet 60 of disposable diaper and the decorative pattern of installation site that represents connecting band 90 is printed in back sheet 60a or outer packaging sheet 60 non-skin butt side face or the non-skin butt side that the sheet material of decorative pattern is disposed at back sheet 60a or outer packaging sheet 60 is used as to target portion.

Lower limb pars contractilis 75 encloses peristome 35 than absorber 40 by the lower limb in product width direction outside and configures along being located at, and is configured to and can on product length direction L, stretches.Lower limb encloses peristome 35 and lower limb pars contractilis 75 and has position on width and be positioned at the width inner end region 75I of the innermost side of lower crotch region.Lower limb enclose peristome 35 and lower limb pars contractilis 75 especially in low back region along with extending to product width direction outside towards product length direction outside from lower crotch region 25.In addition, the width inner end region 75I of lower limb pars contractilis 75 both can be disposed in product length direction continuously, also can be discontinuous in product length direction.In the present embodiment, lower limb encloses that position on the width of peristome 35 is positioned at the region of the innermost side of lower crotch region and the width inner end region 75I of lower limb pars contractilis 75 is consistent, but also can be not necessarily consistent.

The lower limb pars contractilis 75 of present embodiment is made up of Stretchable sheet.For example, as this Stretchable sheet, can use polyurethane, the such thermoplastic elastomer resin melting of styrene and be formed as the retractility thin film of film like, the flexible nonwoven fabrics being formed by contractile fibre, will retractility thin film, flexible nonwoven fabrics be carried out to non-extensibility sheet material that partial cut or embrittlement form sticks together and composite sheet of forming etc.

In addition, as the succedaneum of this Stretchable sheet, also can form lower limb pars contractilis 75 by configuring 1 or many thread, the banded elastic components that formed by polyurethane elastomeric fiber, natural rubber.

Lower limb pars contractilis 75 is disposed between flank 70 and outer packaging sheet 60.Or lower limb pars contractilis 75 is disposed between back sheet 60a and flank 70 possessing in the region that is configured in the back sheet 60a between absorber 40 and outer packaging sheet 60.

The Stretchable sheet that preferably the forms lower limb pars contractilis 75 at least width in lower crotch region 25 is the width on the product width direction W under the naturalness of 5mm(disposable diaper 10)～45mm, being more preferably width is 12.5mm～35mm.If be less than 5mm, do not find following effect: owing to enclosing along wearer's lower limb with face in fact, not concentration of local and reduce the load that is put on skin by elasticity key element of binding force, if exceed 45mm, compared with length in the product width direction of disposable diaper entirety, the region of enclosing along lower limb is wide, and Stretchable sheet is easy to be involved in wearer's bodyside or clot.

The percentage elongation of lower limb pars contractilis 75 is preferably 1.6 times～2.3 times.In the present embodiment, the percentage elongation of lower limb pars contractilis 75 is set to 1.8 times～2.0 times.In addition, percentage elongation refers to the elongation degree of lower limb pars contractilis, and it is limited as described below.

Percentage elongation=(length of the lower limb pars contractilis under elongation state) ÷ (length of the lower limb pars contractilis under naturalness)

In addition, in this manual, this percentage elongation is for example to obtain by measurement as follows.

The first, in the situation that disposable diaper 10 is enclosed packaging etc., take out disposable diaper 10 from packaging.Then, cut the configuring area of lower limb pars contractilis.Now, the part cutting also comprises the outer packaging sheet engaging with lower limb pars contractilis.The percentage elongation of the sample of the lower limb pars contractilis after measurement cuts, thereby the percentage elongation of measurement lower limb pars contractilis.

About each sample, under 20 DEG C ± 2 DEG C, the environment of relative humidity 60% ± 5%RH, place after 60 minutes, along the length of flexible orientation measurement lower limb pars contractilis.This length is made as to " length of the lower limb pars contractilis under naturalness ".

Second, measure length in the flexible direction in the desired region under this state (, naturalness) and extend on non-Stretchable sheet the length in the flexible direction in the desired region cannot confirm till the state of the fold producing because of elastic component with range estimation time from naturalness.This length is made as to " length of the lower limb pars contractilis under elongation state ".

Use above-mentioned measurement result and utilize above-mentioned formula to calculate, thereby measure percentage elongation.

In addition, the interval of the medial extremity on the product width direction W of pair of right and left lower limb pars contractilis 75 is along with broadening towards Attacking Midfielder's region 20 from lower crotch region 25, and along with broadening towards low back region 30 from lower crotch region 25.In the case of diaper being dressed in wearer's health, by lower limb pars contractilis being configured to lower crotch shape narrower and that expand towards front and back waist, can further make the curve of lower limb pars contractilis along health, can be to enclose with wearer's lower limb the mode extended configuration lower limb pars contractilis matching.

And then this interval (D1 in figure) of the end in Attacking Midfielder's region 20 of pair of right and left lower limb pars contractilis 75 is narrower than the interval of the end in low back region 30 of pair of right and left lower limb pars contractilis 75 (D2 in figure).In addition, this interval is that distance between the medial extremity on the product width direction W that disposable diaper 10 is measured from naturalness after product length direction L and product width direction W expand and be held in the state without wrinkle to pair of right and left lower limb pars contractilis 75 obtains.

The skin surface of wearer's health to extend in buttocks place especially large, and comparatively obvious in the position in the width outside by this disposable diaper.In addition, lower limb pars contractilis 75 is mutually closely sealed with wearer's health.Therefore, by being made as D2 > D1, even put on disposable diaper 10 in wearer's action, also can with the mutually closely sealed state of the lower limb pars contractilis 75 of buttocks side under stretch, even if the variable quantity stretching is larger, lower limb pars contractilis 75 also can not be close to.Thereby, can suppress the skew of the disposable diaper 10 being caused by lower limb pars contractilis 75.

In addition, the interval between wearer's two lower limbs is lower crotch region shape the narrowest and that expand from lower crotch region ventrad side, dorsal part.Because lower limb encloses the shape that peristome and lower limb pars contractilis 75 are from lower crotch region to length direction outside and extend to width outside, therefore can around configure lower limb along wearer's lower limb and enclose peristome and lower limb pars contractilis 75, can suppress local stress concentration, therefore can make disposable diaper mutually closely sealed with wearer with lower percentage elongation, can alleviate the burden that puts on skin.

Lower limb pars contractilis 75 is configured to and makes disposable diaper enclose bending and shrink along wearer's lower limb.The product length direction end of lower limb pars contractilis 75 is configured to width expansion, and is disposed near of waistline maintaining part.Thus, the product length direction end of lower limb pars contractilis 75 plays a role in the mode of shrinking to width together with waistline maintaining part.

The shape of crotch pars contractilis 200 then, is described.Crotch pars contractilis 200 is configured to compared with other parts of absorber 40 can maintain smooth shape in the time wearing disposable diaper in the part of lower crotch region.Crotch pars contractilis 200 is configured at least and can on product length direction L or product width direction W, stretches.

Crotch pars contractilis 200 arranges with respect to lower limb pars contractilis 75 is independent, and be configured to and locating more than 60% contraction of the length on the width of the absorbability core 40a that makes this lap position place with the equitant position of absorbability core 40a (position between core cladding 40b and the back sheet 60a of parcel absorbability core 40a in the present embodiment).Like this, by utilizing crotch pars contractilis 200 to make to dispose the part of absorbability core 40a to shrink, absorbability core 40a is shunk, be easy to the shape that remains smooth compared with the part of not shrinking with absorbability core 40a.

On the other hand, be positioned at than crotch pars contractilis 200 by Attacking Midfielder's region of the position in product length direction outside, be positioned at low back region absorbability core 40a not because crotch pars contractilis 200 shrinks.Thereby, utilizing connecting band diaper to be held under the state around wearer's waist, waist, the crotch pars contractilis 200 that is maintained smooth shape at the lower crotch of disposable diaper can be exceedingly mutually not closely sealed with health, result, and crotch pars contractilis 200 is configured to moderately along health.

In addition, in the situation that crotch pars contractilis 200 can be flexible on product length direction L, Attacking Midfielder's region 20 and low back region 30 are easy to erect by the contraction of crotch pars contractilis 200, in the time wearing, can form smooth lower crotch region along health at wearer's crotch part.

Its result, because Attacking Midfielder's region 20 and low back region 30 erect from crotch pars contractilis 200, has therefore improved disposable diaper 10 and has been dressed in wearer's fit with it.

That is, utilize the contraction of crotch pars contractilis 200, the mode that can be disposed at wearer's lower crotch with the lower crotch region 25 of disposable diaper 10 is stably worn disposable diaper 10.

Preferably crotch pars contractilis 200 is made up of Stretchable sheet.

By be made up of crotch pars contractilis 200 Stretchable sheet, the absorbability core 40a that has configured the region of Stretchable sheet is retracted equally, thereby is more easy to the shape that remains smooth.In addition, Stretchable sheet for example can be made up of the Stretchable sheet identical with lower limb pars contractilis 75.

In addition,, as the succedaneum of this Stretchable sheet, also can form crotch pars contractilis 200 by configuring many thread, the banded elastic components that formed by polyurethane elastomeric fiber, natural rubber.In this case, in order to utilize crotch pars contractilis 200, absorbability core 40a is similarly shunk, preferred elastomeric member being spaced apart below 7mm each other, is more preferably below 5mm.In addition, for absorbability core 40a is similarly shunk, preferably the difference at the interval between adjacent elastic component is below 2mm.

In addition, specifically, preferably the percentage elongation of crotch pars contractilis 200 is 1.2 times～1.8 times.In the present embodiment, the percentage elongation of crotch pars contractilis 200 is set to 1.4 times.Percentage elongation refers to the elongation degree in the flexible direction (product length direction L) of crotch pars contractilis 200, and it is limited as described below.

Percentage elongation refers to the elongation degree of the crotch pars contractilis 200 in flexible direction (in the present embodiment, product length direction L), and it is limited as described below.

Percentage elongation=(length in the flexible direction of the crotch pars contractilis 200 under maximum deployed condition)/(length in the flexible direction of the crotch pars contractilis 200 under naturalness)

The first, in the situation that disposable diaper 10 is enclosed packaging etc., take out disposable diaper 10 from packaging, under this state, under 20 DEG C ± 2 DEG C, the environment of relative humidity 60% ± 5%RH, place after 60 minutes, along the length of flexible orientation measurement crotch pars contractilis.This length is made as to " length in the flexible direction of the crotch pars contractilis 200 under naturalness ".

Second, measure length in the flexible direction in the desired region under this state (, naturalness) and extend to the length the flexible direction in the desired region cannot confirm till the state of the fold producing because of elastic component with range estimation time from naturalness.This length is made as to " length in the flexible direction of the crotch pars contractilis 200 under maximum deployed condition ".

Use above-mentioned measurement result, by utilizing above-mentioned formula to calculate to measure percentage elongation.

Like this, by the percentage elongation of crotch pars contractilis 200 being made as to 1.2 times～1.8 times, can follow the trail of rightly wearer's skin flexible.

For example, when wearer shrinks so anteflexion posture in health front side, at the skin place of wearer's buttocks side, have the position that stretch 30% left and right with respect to the state stretching one's body.

; if the percentage elongation of crotch pars contractilis 200 is made as below 1.2 times; the contraction of the crotch pars contractilis 200 under naturalness is insufficient; compared with the situation of crotch pars contractilis 200 is not set; the contraction of the absorbent body area of the crotch part of disposable diaper 10 is less, thus cause cannot be fully at wearer's crotch part to form smooth shape along the mode of health.

On the other hand, if make the percentage elongation of crotch pars contractilis 200 be greater than 1.8 times, the contraction on the shrinkage direction of crotch pars contractilis 200 is oversize, therefore have the region of crotch pars contractilis 200 with respect to more easily form the state mutually closely sealed with health for health, thereby cause disposable diaper 10 to be easy to the below skew to wearer.

In addition, the amount of contraction on the product length direction L of crotch pars contractilis 200 also can be configured to 2%～8% of length on the product length direction L of disposable diaper 10.

In addition, amount of contraction is to dwindle fully and the surface of sample approaches poor along between the length under the naturalness in the direction of flexible direction " a(mm) " of length under the state that level and smooth mode extends " b(mm) " and sample with fold, can utilize (b-a) to calculate.

If the inventor is made as the amount of contraction on the product length direction L of crotch pars contractilis 200 2%～8% of length on the product length direction L of disposable diaper 10, can confirm: disposable diaper 10 is dressed in wearer's process with it, be easy to make crotch pars contractilis 200 well along wearer's health.

At this, if the amount of contraction on the product length direction L of crotch pars contractilis 200 is larger than 8%, can cause crotch pars contractilis 200 excess shrinkage, and then cause the curtailment on the product length direction L of disposable diaper 10, thereby be difficult to that disposable diaper 10 is dressed on wearer's health or disposable diaper 10 and wearer's health exceedingly closely sealed and be easy to cause skew in lower crotch region 25.

On the other hand, if the amount of contraction on the product length direction L of crotch pars contractilis 200 is made as below 2%, can cause being difficult to finding to make the effect of disposable diaper 10 near the such crotch pars contractilis 200 of wearer's health itself.

In addition, the center configuration of the crotch pars contractilis 200 on product length direction L is in forward waistline region, disposable diaper 10 center 20 sides than on product length direction L.In addition, crotch pars contractilis 200 is configured to cross over the disposable diaper 10 center on product length direction L.

In this case, consider the rigidity of the rigidity of absorbability core 40a and other members of formation disposable diaper 10, can suitably select the thickness of used elastic component, the spacing of configuration, but preferably in the main body of disposable diaper 10 in the raw when (non-elongation state), the state of the whole side edge part on the product width direction W of absorbability core 40a in shrinking.

In addition, be formed with absorber breach 115(absorber breach 125 at the lower crotch region 25 of absorber 40).Absorber breach 115 and absorber breach 125 are the regions that do not have the absorbability core 40a that forms absorber 40.Present embodiment in, absorber breach 115 and absorber breach 125 are equivalent to the weight per unit area low rigid portion lower than the weight per unit area of other parts of absorbability core 40a of absorbability core 40a.In addition, also can not form absorber breach 115 and absorber breach 125 but the region of absorber breach 115 and absorber breach 125 to be made as to the weight per unit area of absorbability core 40a lower than the weight per unit area of other parts of absorbability core 40a.

Absorber breach 115 and absorber breach 125 exist along the edge on the product length direction L of crotch pars contractilis 200.In addition, even if be formed with absorber breach 115 and absorber breach 125, the absorbability core 40a that is also preferably placed at Attacking Midfielder's region 20 and low back region 30 and the absorbability core 40a that is positioned at lower crotch region 25 be incomplete separate and especially on width continuously.

The length on product length direction L becomes large along with going towards product width direction W outside for absorber breach 115 and absorber breach 125.Owing to utilizing such shape to make the product width direction W outside of absorbability core 40a more be easy to shrink, be therefore more easy to form smooth " bottom ".And then, erect and be easy to mode bending with the curve of health along wearer (abdominal part and buttocks) by the absorbability core 40a of the position of low back region 30 from " bottom " owing to being positioned at than the absorbability core 40a of the position in the forward waistline of absorber breach 115 region 20 and being positioned at than absorber breach 125, therefore can make the shape of disposable diaper itself more be close to the shape of wearer's health.

In addition absorber breach 115(absorber breach 125) forward waistline region 20(low back region 30) edge be circular-arc.Absorber breach 115(absorber breach 125) edge be being centered close to than this edge by low back region 30(Attacking Midfielder region 20 of circular arc) the shape of position.Utilize such shape, make to become and be more prone to and be easy to produce significantly this distortion along the distortion of the curve of wearer's health.

The wearing effect of the disposable diaper forming in this wise then, is described.Fig. 4 is the figure that schematically shows the wearing effect of disposable diaper.In the time wearing, the fastened component of connecting band is fixed on to target portion, thereby disposable diaper is held in to wearer's waistline place.Now, the front notch part 31 that is formed at the anterior end of disposable diaper is disposed at wearer's umbilicus part.Thus, the umbilicus part that can suppress disposable diaper and meet wearer, can suppress umbilicus to cause stimulation.

Conventionally, baby's abdominal part is outstanding around, in the case of on the anterior end of disposable diaper is positioned at the protuberance of abdominal part, likely cannot utilize disposable diaper to cover rightly the protuberance of abdominal part.As shown in Figure 4; by making the fixed position of connecting band be positioned crotch side and width inner side; and wearing this disposable diaper Attacking Midfielder's region is carried to one side state of side stretching outside width on one side, thereby can in protection wearer's umbilicus, cover rightly the protuberance of abdominal part.

Specifically; when when Attacking Midfielder's region being carried on one side to the state of side stretching is worn outside width on one side; make notch part to width outside expansion by the Attacking Midfielder's region at disposable diaper, can be in protection wearer's umbilicus configure this disposable diaper along the protuberance of wearer's abdominal part.

On the other hand, because the low back region of disposable diaper is stretched by waistline area side forward, therefore become the state of being close on health, and likely make wearing feeling worsen, but, owing to being formed with the rear notch part 32 separating with waistline maintaining part, therefore in the time that the connecting band of low back region is pulled to Attacking Midfielder's region, can make to be positioned at than this waistline maintaining part with the state that utilizes waistline maintaining part that this disposable diaper is held in to wearer's waistline and expand by the rear notch part 32 of the position in product length direction outside, thereby low back region is pulled to Attacking Midfielder's region side.(a) of Fig. 6 represents that disposable diaper is by the rear notch part 32 before wearing, and (b) of Fig. 6 represents that disposable diaper is by the rear notch part 32 after wearing.

Because waistline maintaining part is the part that disposable diaper is held in to wearer's health, therefore for example, if waistline maintaining part and rear notch part 32 are overlapping, in the time wearing by connecting band outside product width direction when side stretching, likely after notch part 32 in waistline maintaining part along product width Directional Extension, thereby be difficult to the waistline maintaining part of dorsal part to be held in wearer.But, because waistline maintaining part and rear notch part 32 separate, therefore can only be pulled to Attacking Midfielder region side than waistline maintaining part by the region in length direction outside by being positioned at and make the fixed position of connecting band be positioned crotch side and width inner side with the state of the position that maintained waist, thereby can wear this disposable diaper Attacking Midfielder's region is carried on one side to the state of side stretching outside width on one side.Its result, even abdominal part outstanding baby around also can cover the protuberance of abdominal part rightly.

Between rear notch part 32 and waistline maintaining part, be provided with waistline pars contractilis 85.By waistline pars contractilis 85 is set, in the time that connecting band 90 is sticked in to target portion 95, waistline maintaining part is maintained to the state of wearer's waist position, make to be positioned at than waistline maintaining part the stickiness raising by the region in length direction outside by shrinking waistline pars contractilis 85, thereby be easy to waistline maintaining part to be maintained at wearer's waist position.And then, after connecting band 90 is sticked in to target portion 95, be easy to Attacking Midfielder's region layback to rear waist position by shrinking waistline pars contractilis 85.

In addition, when making the fixed position of connecting band be positioned crotch side and width inner side and when Attacking Midfielder's region being carried on one side to the state of side stretching is being worn this disposable diaper outside width on one side, can make waistline pars contractilis 85 fit in wearer's back and utilize waistline pars contractilis 85 that this Attacking Midfielder's region is pulled to low back region side, as a result of, can on around wearer's abdominal part, shift to an earlier date waistline region.

In addition can suitably set, the expansion and contraction of waistline pars contractilis 85.By suitably setting the expansion and contraction of waistline pars contractilis 85, the contraction state of the in-leg area side of rear notch part 32 changes.Thus, be formed as the state that the shape of the rear notch part 32 of diaper under naturalness changes.Thus, the shape of rear notch part 32 of dorsal part of diaper under naturalness (from packaging when taking out and having launched) and the difference between the shape of the front notch part 31 of abdominal part side can be specified, the front and back of disposable diaper can be more prone to identify.

Length in the product width direction of the Length Ratio absorber in the product width direction of waistline pars contractilis is long.In the region that disposes absorber, because of rigidity, relatively high being difficult to stretches.Because the region that the length on the width of the Length Ratio absorber on the width of pars contractilis is long and extend to width outside than absorber occurs to stretch, therefore the region of extending to width outside than this absorber can be pulled to Attacking Midfielder's region side.

In addition,, owing to wearer being positioned on this disposable diaper to launch the state of disposable diaper, be therefore easy to form the state under the health that absorber is laid on wearer in the time wearing the disposable diaper of banding pattern.By waistline pars contractilis is extended to product width direction outside than absorber, can in the time of stretching connecting band, make the region of the extension from absorber of waistline pars contractilis extend in product width direction, can make low back region mutually closely sealed with flank from wearer's dorsal part waist on one side, Attacking Midfielder's region is pulled to wearer's dorsal part on one side, therefore can be further closely sealed with wearer's abdominal part side.

Under the elongation state of disposable diaper, as shown in Fig. 5 (b), between the anterior end of disposable diaper and the sidepiece that extends to product length direction from anterior end at front notch part 31, the angle [alpha] that forms is obtuse angle.In addition,, under the elongation state of disposable diaper, as shown in Fig. 5 (a), between the rear end of disposable diaper and the sidepiece that extends to product length direction from rear end at rear notch part 32, the angle beta that forms is acute angle.Specifically, angle [alpha] is 105 degree, and angle beta is 75 degree.In addition, front notch part 31 and rear notch part 32 curved shape in the time overlooking.In addition, the elongation state of disposable diaper refers to and disposable diaper is extended until do not form the state of the state of the fold forming because of the lower limb pars contractilis of disposable diaper etc.

Front notch part 31 is the parts that are disposed in the time wearing on wearer's abdominal part, is the obvious part of eyes of wearing auxiliary.Thus, for example, if front notch part 31 has the part of acute angle, wear auxiliary and likely front notch part 31 can be regarded to stimulus object, thereby cannot obtain the sense of feeling at ease for disposable diaper.

In addition, if front notch part 31 is acute angle, is difficult to the standard of the anterior end of holding disposable diaper and cannot stablizes and wear position, thereby become the main cause that causes adjusting wearing effect, position skew.

The region of the crotch side of rear notch part 32 utilizes waistline pars contractilis 85 to shrink, and the anterior end of rear notch part 32 is to the expansion of product width direction outside.And then as shown in Fig. 6 (b), by by connecting band, low back region being pulled to Attacking Midfielder's region, the anterior end of rear notch part 32 is to the expansion of product width direction outside.Thus, even be acute angle under the angle beta that the forms elongation state dress and at disposable diaper between the rear end of disposable diaper and the sidepiece that extends to product length direction from rear end at rear notch part 32, angle beta also can increase in the time wearing and in the stage of the connecting band of fixing disposable diaper, thus the stimulation that can suppress skin to cause.

Under the elongation state of disposable diaper, the length in the product length direction of front notch part 31 is 10mm～30mm.Length in the product length direction of rear notch part 32 is 3mm～15mm.

Disposable diaper utilize front notch part and rear notch part and before waistline region to the close mode of umbilicus side by carry.Now, the length in the product length direction of front notch part is more than 10mm, even therefore so that disposable diaper is positioned in the situation that the mode of appropriate position wears, also can suppress the interference with umbilicus.On the other hand, if the Length Ratio 30mm in the product length direction of front notch part is long, even likely after connecting band is fixed on to Attacking Midfielder's region, thereby the anterior end of Attacking Midfielder's region is also easy to cannot cover wearer's abdominal part because front notch part turns back laterally.

Length L 31 in the product length direction of front notch part 31 is longer than the length L 32 in the product length direction of rear notch part 32.Wearing under the state of disposable diaper, will on Attacking Midfielder's region, carry by making rear notch part expansion.Thus, for example, if the length in the product length direction of notch part is long before the Length Ratio in the product length direction of the rear notch part 32 of disposable diaper, in the time wearing after notch part be easy to expand, fixing under the state of the connecting band shown in Fig. 4, be more easy to make connecting band with angle.In the time that connecting band is excessively given angle, sometimes cause the anterior end of Attacking Midfielder's region to be easy to turn back laterally.But, by making the length L 31 in the product length direction of front breach 31 longer than the length L 32 in the product length direction of rear notch part 32, can suppress the anterior end of Attacking Midfielder's region and turn back laterally.

Length W32 in the product width direction of rear notch part 32 is 20mm～90mm.

Length W31 in the product width direction of front notch part 31 is 20mm～90mm.

In addition, preferably after length in the product width direction of notch part 32 be below 1/3 of length (not comprising the length of connecting band) on the width of low back region.Adopt this structure, have in the width outside of rear notch part 32 region that is easy to the shape that remains smooth, more than the length of the length on the width in this region on the width of rear notch part 32.Thus, can make to configure along health by the region in width outside than rear notch part 32.

Do not exist the formation absorbent core of absorber or the weight per unit area of the absorbent core low rigid portion lower than the weight per unit area of other parts to be formed as the rear end that comprises absorber at absorber.Rear notch part 32 is disposed at the position by product length direction outside than low rigid portion.

By in the rear end of absorber, low rigid portion being set, the flexibility of the rear end of absorber improves, and by low back region layback during to Attacking Midfielder's region side, the rear end of absorber is also easy to expand to width.

Front notch part 31 and rear notch part 32 are formed in the region that disposes at least two above nonwoven fabric sheets.

For example, front notch part 31 and rear notch part 32 are formed at and dispose as at least two above topsheets 50 of nonwoven fabric sheet and the region of outer packaging sheet 60.

At this, from the viewpoint of aeration and flexibility, preferably front notch part 31 and rear notch part 32 are formed at and dispose two nonwoven fabric sheets, only dispose in the region of topsheet 50 and outer packaging sheet 60.

Adopt this structure, in the region due to notch part before being formed with 31 and rear notch part 32, do not configure thin-film sheet, therefore can reduce the hardness in this region.

In addition, in the situation that back sheet 60a is nonwoven fabric sheet, front notch part 31 and rear notch part 32 also can from dispose topsheet 50 and packaging sheet 60 region to dispose topsheet 50, back sheet 60a and outside packaging sheet 60 region form.

But, be thin-film sheet etc. but not nonwoven fabric sheet in the situation that, front notch part 31 and rear notch part 32 can not be formed in the region that disposes back sheet 60a at back sheet 60a.

In addition, front notch part 31 and rear notch part 32 have the convex form towards the product width direction W Shang center of disposable diaper 10, in the situation that overlooking disposable diaper 10, the shape that the breach contour line (Japanese: cut り and owe I ライ Application) of front notch part 31 and the breach contour line of rear notch part 32 also can be formed as crawling.

In other words, in the situation that overlooking disposable diaper 10, the breach contour line of front notch part 31 and the breach contour line of rear notch part 32 also can be formed as the curve being made up of the convex form of double-layer overlapping, and the central authorities of the apex configuration of the convex form of the second layer on product width direction W.

At this, if the breach contour line of front notch part 31 and rear notch part 32 is formed as the curve being made up of the convex form of monolayer, can produce Attacking Midfielder's region 20 of disposable diaper 10, the impression that low back region is cut dearly.

For example, front notch part 31 and rear notch part 32 that length on the product length direction L that forms product width direction W central authorities is 20mm, if utilize the curve being formed by the convex form of monolayer to form this front notch part 31 and rear notch part 32, can cause producing the uneasy impression having for seepage, if utilize the curve being formed by the convex form of double-layer overlapping to form this front notch part 31 and rear notch part 32, can not cause producing the uneasy impression having for seepage, and such situation of can avoiding rubbing between disposable diaper 10 and child's umbilicus part.

In addition, if utilize the curve being formed by the convex form of double-layer overlapping to form front notch part 31 and rear notch part 32, disposable diaper 10 and wearer's abdominal section from time, by form the breach contour line of the change point that is provided with the length on multiple product length direction L on product width direction W, can dwindle the gap between wearer's abdominal part, back and disposable diaper 10, can make gap inconspicuous.

In addition, in the disposable diaper 10 of present embodiment, also can be configured to the sheet number that increases successively configured sheet material along with the anterior end 10F in the past waistline region 20 towards the center of the product length direction L of disposable diaper 10, also can be configured to the sheet number that increases successively configured sheet material along with the rear end 10R from low back region 30 towards the center of the product length direction L of disposable diaper 10.

For example, in the disposable diaper 10 of present embodiment, the first, in the neighboring area of the anterior end 10F in Attacking Midfielder's region 20, dispose topsheet 50 and outer packaging sheet 60.

The second, with adjacent region, the neighboring area of the anterior end 10F of Attacking Midfielder's region 20 in dispose topsheet 50, back sheet 60a and outside packaging sheet 60.

The 3rd, in the region that comprises the product length direction L Shang center in Attacking Midfielder's region 20, dispose topsheet 50, core cladding 40b, back sheet 60a and outside packaging sheet 60.

As mentioned above, if front notch part 31 is set, front notch part 31 is formed as flex point, in the time generating a gap between the health (around abdominal part, waist) disposable diaper 10 and wearer, is easy to produce 31 folds that extend along product length direction L of notch part in the past.

In addition,, as the peculiar physical characteristic of child at neonate, low monthly age, its abdominal part is outstanding laterally around, and larger towards the variation of the inclination of lower crotch from umbilicus part.

Therefore, in order to make the end of Attacking Midfielder's region 20 sides of disposable diaper 10 more along the health with such physical characteristic, make disposable diaper 10 main body thickness all the time from target portion 95 towards the attenuation of the anterior end 10F of Attacking Midfielder's region 20 side, thereby the surrounding of the front notch part 31 that umbilicus part uses is easy to along the health of wearer's (neonate etc.), between disposable diaper 10 and wearer's health, is difficult to produce gap.

In addition, in the disposable diaper 10 of present embodiment, also can be configured to by the fiber in anterior end 10F compression topsheet 50 and the outer packaging sheet 60 of Attacking Midfielder's region 20 and make volume-diminished, thereby topsheet 50 be interweaved but not the state that dissolves engages with outer packaging sheet 60 with the fiber in both.

At this, do not configure thin-film sheet because the anterior end 10F of Attacking Midfielder's region 20 is only made up of nonwoven fabric sheet (fibrous layer), therefore cut by the cutter of the low temperature of the melting point of fiber with than forming this anterior end 10F and can make topsheet 50 interweave with the fiber in both with outer packaging sheet 60 but not the state that dissolves engages.

One example of the manufacture method of the absorbent commodity of present embodiment then, is described.In addition, unaccounted method in the present embodiment, can be used existing method.In addition, below illustrated manufacture method be an example, also can utilize other manufacture method to manufacture.The manufacture method of absorbent commodity at least comprises that structure member formation operation, structure member mounting operation, lower limb enclose and form operation and cutting action.

Form in operation at structure member, form the structure member that forms absorbent commodity.Specifically, for example, carry out molding absorber 40 by stacked absorbing material.

In structure member mounting operation, form the Stretchable sheet of lower limb pars contractilis 75, other the net, leakproof sheet material, absorber etc. such as net that form topsheet and form the structure member of disposable diaper 10 in the online mounting that forms back sheet.

More particularly, the Stretchable sheet that forms lower limb pars contractilis 75 is extended, and then make this Stretchable sheet be needed on and intermittently rouse (Japanese: Inter owes De ラ system) above at width superior displacement, and intermittently on drum, Stretchable sheet is being cut into each product length on one side on one side.Be accompanied by the intermittently rotation of drum, Stretchable sheet interval is to each other set, and Stretchable sheet is needed on continuous online.Like this, lower limb pars contractilis can be configured to curve-like.

Enclose and form in operation at lower limb, along the cutting of width outboard end topsheet 50, outer packaging sheet 60 and the back sheet 60a of lower limb pars contractilis 75.Like this, be formed with and be disposed at the lower limb that wearer's lower limb encloses and enclose peristome 35.

In cutting action, notch part 32 and front notch part 31 after forming on the continuum that disposes topsheet 50, back sheet 60a, absorber 40 etc., afterwards, be cut into continuum the size of a product along product width direction W.Thus, can manufacture disposable diaper 10.After formation when notch part 32 and front notch part 31, form and make the rear notch part 32 of a disposable diaper and the integrated opening forming of front notch part 31 with other adjacent disposable diapers of this disposable diaper.Then, by continuum being cut into along product width direction W to the size of a product, this opening is divided, notch part 32 after a disposable diaper forms, notch part 31 before forming with adjacent other disposable diapers of this disposable diaper.

As mentioned above, disclose content of the present invention by embodiments of the present invention, but should not be construed as the present invention and only limit to discussion and the accompanying drawing of a part that becomes the disclosure.Those skilled in the art obviously can expect various alternative embodiments, embodiment and application technology from the disclosure.

The present invention comprises here the various embodiments do not recorded etc. certainly.Thereby protection scope of the present invention is only determined by the invention technical characterictic of the appropriate claims that draw according to the above description.

description of reference numerals

10, disposable diaper; 10F, anterior end; 10R, rear end; 20, Attacking Midfielder's region; 25, lower crotch region; 30, low back region; 35, lower limb encloses peristome; 40, absorber; 40a, absorbability core; 40b, core cladding; 50, topsheet; 60, outer packaging sheet; 60a, back sheet; 70, flank; 71, elastic component; 75, lower limb pars contractilis; 75I, width inner end region; 80, lower limb side rivel portion; 81, bonding part; 81A, the 1st bonding part; 81B, the 2nd bonding part; 82, free end portion; 84, contraction flow region; 85, waistline pars contractilis; 90, connecting band; 91, substrate sheet; 92, hook sheet material; 95, target portion; 110, low rigid portion; 115, absorber breach; 125, absorber breach; 200, crotch pars contractilis; L, product length direction; W, product width direction; α, angle; β, angle.

Claims

1. a disposable diaper, is characterized in that, comprising:

Attacking Midfielder's region; Low back region; Lower crotch region between above-mentioned Attacking Midfielder's region and above-mentioned low back region;

Product length direction from above-mentioned Attacking Midfielder's region towards above-mentioned low back region;

With the mutually orthogonal product width direction of the said goods length direction;

Step up and state lower crotch region and the absorber at least one extension in above-mentioned Attacking Midfielder's region and above-mentioned low back region;

In above-mentioned Attacking Midfielder's region and above-mentioned low back region, extend and disposable diaper be held in to the waistline maintaining part on wearer's health along product width direction; And

From above-mentioned low back region to product width direction, outside is extended and is fixed on a pair of connecting band in above-mentioned Attacking Midfielder's region,

In above-mentioned Attacking Midfielder's region, the region that is positioned at the said goods width Shang center and comprises the end on the said goods length direction, be formed with front notch part,

In above-mentioned low back region, the region that is positioned at the said goods width Shang center and comprises the end on the said goods length direction, be formed with rear notch part,

Above-mentioned rear notch part is set as and is separating with above-mentioned waistline maintaining part by the position in the outside of above-mentioned product length direction than above-mentioned waistline maintaining part.

2. disposable diaper according to claim 1, is characterized in that,

Between above-mentioned rear notch part and above-mentioned waistline maintaining part, be provided with at least pars contractilis flexible on the said goods width.

3. disposable diaper according to claim 2, is characterized in that,

Length on the said goods width of the above-mentioned absorber of Length Ratio on the said goods width of above-mentioned pars contractilis is long.

4. according to the disposable diaper described in any one in claim 1～3, it is characterized in that,

Under the elongation state of above-mentioned disposable diaper, the anterior end of above-mentioned disposable diaper is obtuse angle with the angle that the sidepiece extending along the said goods length direction from above-mentioned anterior end at above-mentioned front notch part forms,

The rear end of above-mentioned disposable diaper is acute angle with the angle that the sidepiece extending along the said goods length direction from above-mentioned rear end at above-mentioned rear notch part forms.

5. according to the disposable diaper described in any one in claim 1～3, it is characterized in that,

Under the elongation state of above-mentioned disposable diaper, the length on the said goods length direction of above-mentioned front notch part is 10mm～30mm,

Length on the said goods length direction of above-mentioned rear notch part is 3mm～15mm.

6. disposable diaper according to claim 5, is characterized in that,

Length on the said goods length direction of the above-mentioned rear notch part of Length Ratio on the said goods length direction of above-mentioned front notch part is long.

7. according to the disposable diaper described in any one in claim 1～3, it is characterized in that,

In above-mentioned absorber, be formed with low rigid portion in the mode of the rear end that comprises above-mentioned absorber, in this low rigid portion, there is not the absorbent core that forms above-mentioned absorber, or, in this low rigid portion, the weight per unit area of above-mentioned absorbent core is lower than the weight per unit area of other parts

Above-mentioned rear notch part is disposed at the position by the outside of above-mentioned product length direction than above-mentioned low rigid portion.