CN104822348B - Disposable diaper - Google Patents

Disposable diaper Download PDF

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Publication number
CN104822348B
CN104822348B CN201380061623.3A CN201380061623A CN104822348B CN 104822348 B CN104822348 B CN 104822348B CN 201380061623 A CN201380061623 A CN 201380061623A CN 104822348 B CN104822348 B CN 104822348B
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CN
China
Prior art keywords
pars contractilis
width direction
product
product width
leg
Prior art date
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Active
Application number
CN201380061623.3A
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Chinese (zh)
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CN104822348A (en
Inventor
坂口智
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
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Unicharm Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49017—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means being located at the crotch region
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F2013/49041—Form-fitting, self-adjusting disposable diapers with elastic means having a specific location other than covered by groups A61F13/49011 - A61F13/49019

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

Abstract

A disposable diaper (10) has leg elastic sections (75), which expand and contract in a product longitudinal direction, disposed further to the inside in a product width direction than a pair of leg opening sections. The area between a rear leg opening section (35R) and a straight line that passes through the center in the product width direction parallel to the product longitudinal direction is larger than the area between a front leg opening section (35F) and the straight line, which extends in the product longitudinal direction through the center in the product width direction. A pair of elastic buttock sections (77), which expand and contract in the product longitudinal direction, is disposed further to the outside in the product width direction than the leg elastic sections. The distance (La) in the product width direction between the outer edge of a fastening tape in the product width direction and the elastic buttock section is shorter than the distance (Lb) in the product width direction between the center of the disposable diaper in the product width direction and the outer edge of the elastic leg section in the product width direction.

Description

Disposable diaper
Technical field
The present invention relates to a kind of disposable diaper.
Background technology
In the past, a kind of following diaper is disclosed：The diaper is opening diaper, and it possesses absorber and extends to than absorbing Body is being configured with main bullet than absorber by the flank of the position on the outside of product width direction by the position on the outside of product width direction Property material, be configured with secondary elastomeric material (for example, referring to patent by the position on the outside of product width direction than the main elastomeric material Fig. 1, Fig. 2, the page 4 of document 1 is to page 5).
Main elastomeric material is configured at the calf circumference of wearer.Secondary elastomeric material is configured at the length direction end of disposable diaper Nearby than main elastomeric material by the position on the outside of product width direction.The product width side of diaper in the presence of secondary elastomeric material Shrink to sidepiece, be prevented from the side leakages such as urine.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Patent Publication 2-96118 publication
The content of the invention
However, there is problem below in above-mentioned disposable diaper.
The body of wearer is not symmetrical in front and back, but longer than veutro positioned at the buttocks of dorsal part.The purpose of conventional diaper It is to cover the body of wearer using the flank extended to than absorber by the position on the outside of product width direction, but is configured at The front waist region of the veutro of wearer is symmetrical with the rear waist region of the dorsal part for being configured at wearer.Thus, conventional diaper It is not to be configured in the way of the lines along body, but the state tightened with the dorsal part in wearer is configured.Specifically Say, the area of the flank contacted with buttocks is not enough, flank is configured to the convex of inwardly (bodyside of wearer) protrusion, flank Become the state tightened.
If secondary elastic member contracts in such a state, sometimes when diaper is dressed constriction to inner side crimping, Or constriction deviates under wearing state, it is impossible to rightly cover buttocks.
In addition, in the opening diaper of wearing, with the lower crotch that the width center of leg-openings portion is directed at wearer Center mode by disposable diaper configure in the lower section of wearer, encase buttocks and forward waistline using rear waist region Region side stretching fixing component, diaper is fixed on the waistline of wearer using fixing component.Diaper is dressed if so, then firm Buttocks can be covered after wearing.However, as shown in Fig. 2 and Fig. 3 of patent documentation 1, in diaper the shape of wearer is worn on Under state, secondary elastic component is configured near the root of the part that hip are most heaved.If thus, the root of the part most heaved in hip Elastic member is configured near portion, it is possible to which the sidepiece of diaper is rolled in up and down lower limb, exposes hip.Further, since only The region engaged using fixing component is fixed up front waist region and rear waist region, is easily produced after wearing diaper Raw pair elastic component is shunk so as to be involved in the situation of inner side due to wearer's activity.
Therefore, the present invention be in view of above-mentioned problem and complete, its object is to provide one kind rightly to cover The disposable diaper of the product width direction end crimping in wearing is prevented while lid buttocks.
The disposable diaper (disposable diaper 10) of the disclosure will be intended to：The disposable diaper has front waistline area Domain, rear waist region and the lower crotch region between the front waist region and the rear waist region, the disposable urine Cloth is with the product length direction from the front waist region towards the rear waist region and with the product length direction just The product width direction of friendship, the disposable diaper possesses：Absorber, it is through the lower crotch region and to the front waistline area At least one of domain and the rear waist region extend；Flank, its through the front waist region, the lower crotch region and The rear waist region, and be configured at than the absorber by the position on the outside of the product width direction；And a pair of thread gluings Band, from the rear waist region of the flank to product width direction, outside extends for it, and is fixed on the front waist region, Have in the flank：Leg opening part, the central concave in its described product width direction to the absorber；And lower limb Portion's pars contractilis, it is configured at than the leg opening part by the position on the inside of product width direction, and in the product length side Stretch upwards, the leg opening part has：Rear side leg opening part, it is located at longer than the product of the leg opening part The position of the center side rearward on degree direction；And front side leg opening part, it is located at the product than the leg opening part The position of the forward side in center on product length direction, the rear side leg opening part and by the product width direction Area between the heart and the straight line parallel with product length direction is more than the front side leg opening part and by the product width Center and the area between the straight line of product length direction extension on degree direction, than the leg pars contractilis institute is being leaned on State in product width direction two outside position be configured with a pair of buttocks pars contractilis, a pair of buttocks pars contractilis be configured to through The lower crotch region and the rear waist region, and, the product width side of the magic tape flexible along the product length direction Product of the outside distance between side end and the buttocks pars contractilis in the product width direction than the disposable diaper In the product width side between product width center and the product width direction outboard end of the leg pars contractilis Distance upwards is short.
Description of the drawings
Fig. 1 is the expansion top view of the disposable diaper of present embodiment.
Fig. 2 is the sectional view along the F1-F1 lines shown in Fig. 1 of disposable diaper.
Fig. 3 is the sectional view along the F2-F2 lines shown in Fig. 1 of disposable diaper.
Fig. 4 is that the disposable diaper for representing present embodiment is worn on the figure of the state of wearer.
Fig. 5 is that the disposable diaper for representing present embodiment is worn on the figure of the state of wearer.
Specific embodiment
Next, illustrating to the embodiment of the disposable diaper 10 of the present invention referring to the drawings.Additionally, following In the record of accompanying drawing, identical reference is marked to identical part, the similar reference of the part mark to being similar to.But It is that accompanying drawing is schematic, it should be noted that ratio of each size etc. is different from the ratio of reality.
Therefore, specific size etc. should be judged with reference to the following description.In addition, wrapping certainly each other in accompanying drawing Containing size relationship, the mutually different part of ratio.
(1) the overall schematic configuration of disposable diaper
Fig. 1 is the expansion top view of the disposable diaper 10 of present embodiment.Fig. 2 is disposable diaper along Fig. 1 institutes The sectional view of the F1-F1 lines for showing.Fig. 3 is the sectional view along the F2-F2 lines shown in Fig. 1 of disposable diaper.Exhibition shown in Fig. 1 It is that the elastic component 81 for making leg pars contractilis 75 and leg side rivel 80 is extended to composition disposable diaper 10 just to open top view Dough sheet 50, flank 70 etc. do not form the figure of the state till the state of fold.
Disposable diaper 10 has front waist region 20, lower crotch region 25 and rear waist region 30.Front waist region 20 It is the part contacted with the frontal cowl of wearer (abdominal part).In addition, rear waist region 30 is the rear waist portion with wearer The part that (back) contacts.Lower crotch region 25 is located between front waist region 20 and rear waist region 30.
Additionally, in the present embodiment, it is long by product is referred to as towards the direction of rear waist region 30 from front waist region 20 Degree direction L, will be referred to as product width direction W with the direction of product length direction L-orthogonal.
Disposable diaper 10 possess through lower crotch region 25 and from lower crotch region 25 to front waist region 20 and after waistline area The absorber 40 that at least any one extends in domain 30.Absorber 40 is made up of absorbent core 40a and core covering 40b.
Absorbent core 40a can be by constituting with the material identical material used in conventional disposable diaper, can Suitably constituted using component, material known to comminution pulp, high absorption polymer etc..Absorbent core 40a is by the core bag of lamellar Layer 40b claddings.
Core covering 40b is the sheet material for coating absorbent core 40a.A part at least skin surface side of core covering 40b is by each Plant the fabric nonwoven cloth with liquid permeability or cotton paper sheets (tissue sheet) are constituted.For example, grammes per square metre about 10g/ can be used m2～30g/m2Hot blast fabric nonwoven cloth, spun bond nonwoven fabric, SMS (spunbond-melt blown-spunbond) non-woven fabrics or grammes per square metre about 10g/m2～30g/m2Cotton paper sheets.
Possesses the positive dough sheet 50 of liquid permeability in the face side (skin contact surface side) of absorber 40.In addition, in absorber 40 Rear side (non-skin contact surface side) possess the back sheet 60a of opaque liquid.Overleaf (non-skin connects the rear side of piece 60a Contacting surface side) it is provided with outer load 60.
Side edge part in product width direction W of absorber 40 is respectively equipped with flank 70.Flank 70 is through front waistline area Domain 20, lower crotch region 25 and rear waist region 30, and be configured at than absorber 40 by the position on the outside of product width direction.Side The wing 70 is made up of 1 non-woven fabrics or is made up of more than two multiple non-woven fabrics for overlapping.
A pair of leg opening parts 35 are formed with the flank 70 of disposable diaper 10.Leg opening part 35 is located at disposable urine Side end in the product width direction of cloth, and be along the lower limb of wearer in the state of disposable diaper is dressed in wearer Enclose the part of configuration.Leg opening part 35 is to the central concave in the product width direction of absorbent main body.
Leg opening part 35 has：Rear side leg opening part 35R, it is located in the product length direction than leg opening part Center O4 sides rearward position；And front side leg opening part 35F, it is located in the product length direction than leg opening part The forward side in center position.Rear side leg opening part 35R and by the center in product width direction and with product length side It is than front side leg opening part 35F and by the center in product width direction and long with product to the area between parallel straight line Area between the parallel straight line in degree direction is big.The area is the elastic component 81 for making leg pars contractilis 75 and leg side rivel 80 Area in the state of extending the state for not forming fold to positive dough sheet 50, the flank 70 etc. that constitute disposable diaper 10.
In addition, being respectively equipped with magic tape 90 in a pair of flanks 70.Magic tape 90 is in rear waist region 30 along product width side Extend to W, and be fixed in the non-skin contact layer of front waist region 20, thus, magic tape 90 keeps disposable diaper 10 In the body of wearer.
Target portion 95 is configured in the non-skin contact layer in front waist region, and to fix a pair of magic tapes 90 respectively Mode is constituted.
In the present embodiment, waistline maintaining part is constituted by front waist region 20, rear waist region 30 and magic tape 90.Afterwards The waistline maintaining part of waist area 30 is that self-thread gluing starts to prolong in product width direction with 90 region for being provided with bound fraction The scope stretched.The waistline maintaining part of front waist region 20 is to start to prolong in product width direction from the region for being provided with target portion 95 The scope stretched.
In addition, disposable diaper 10 possesses the crotch pars contractilis in the region for being configured at Chong Die with the absorber of lower crotch region 25 200.Additionally, being described in detail in the aftermentioned structure to crotch pars contractilis 200.
It is provided with flank 70 and is configured at than leg opening part 35 by the position on the inside of product width direction and can be in product A pair of the leg pars contractilis 75 stretched on length direction L.
Leg pars contractilis 75 are arranged in product length direction L longer than crotch pars contractilis 200, and in product width On the W of direction than crotch pars contractilis 200 in the outer part.
Leg pars contractilis 75 are configured to make leg opening part 35 stretch in product length direction, can be along lower limb Portion's peristome 35 configures leg pars contractilis 75, it is also possible to inclined relative to leg opening part 35 with a part for leg pars contractilis 75 State configuration leg pars contractilis 75.
In addition, being configured with buttocks pars contractilis 77 by the position on the outside of product width direction than leg pars contractilis 75, it is matched somebody with somebody It is set to through lower crotch region 25 and rear waist region 30, and it is flexible along product length direction.
In addition, leg pars contractilis 75 and buttocks pars contractilis 77 are substantially in product length side in the presence of rubber band etc. The part shunk upwards, and be the concept in addition to the part of Stretchable sheet is configured in the state of contractility has not been given play to. Additionally, the aftermentioned structure to leg pars contractilis 75 and buttocks pars contractilis 77 is described in detail.
In addition, being provided with long along product in the inner side (near the central authorities in product width direction W) of a pair of leg pars contractilis 75 A pair of leg side rivels 80 that degree direction L extends.Medial extremity of the leg side rivel 80 in the product width direction of flank 70 Portion, and to be configured at the flexible rivel than leg pars contractilis 75 by the erecting of the inner side in product width direction.Leg side pleat Pleat 80 is configured at the position than leg pars contractilis 75 by the inner side in product width direction.Leg side rivel 80 can be using conventional Known structure, specifically, can be made up of other sheet materials mutually independent with flank 70.
In addition, being provided with the waist that can be stretched in product width direction between a pair of magic tapes in product width direction Enclose pars contractilis 85.Waistline pars contractilis 85 make the part between magic tape shrink in product width direction.
In the present embodiment, waistline pars contractilis 85 are made up of Stretchable sheet.Structure with regard to constituting waistline pars contractilis 85 Part is not especially defined, but it is preferred that using the component that as thin as possible and bending stiffness is low, contracting rate is little.By using The relatively low material of bending stiffness constitutes waistline pars contractilis 85, and waistline pars contractilis 85 are easy to along body bend, not to wearer's Body applies load can just make waistline pars contractilis 85 along body of corporally fitting.In addition, by using the less material of contracting Material constitutes waistline pars contractilis 85, can suppress disposable diaper in the case where disposable diaper extends in product width direction Shrink in product length direction, and suppress disposable diaper drop-down to crotch side at the waistline of wearer.
In the present embodiment, the use of weight per unit area is 20g/m as waistline pars contractilis 852～45g/m2It is flexible Property film.
1.5 times～2.5 times of length of the waistline pars contractilis 85 in the case where non-elongate state (naturalness) is elongated to afterwards, Outer load 60 is adhered to using hot-melt adhesive or heat treated etc..
In the present embodiment, waistline pars contractilis 85 are configured between outer load 60 and back sheet 60a.But, constituting In the case of the position than absorbent core 40a by the outside in product length direction being extended to for core covering 40b, waistline pars contractilis 85 can also be configured between core covering 40b and back sheet 60a or between core covering 40b and outer load 60.Waistline pars contractilis Position be not specially limited.In addition, in the case of the region in absorber is not configured, waistline pars contractilis can also be configured Between flank 70 and back sheet 60a or between flank 70 and outer load 60.
Additionally, the waistline pars contractilis of present embodiment are constituted in the way of stretching in product width direction, but waistline is stretched Contracting portion can also be constituted in the way of stretching in product width direction and product length direction.
Magic tape 90 be installed on flank 70 with the corresponding region in rear waist region 30.Magic tape 90 possesses：Substrate sheets 91, It is connected with flank 70；And hook tabs 92, it is provided with multiple combination hooks (not shown) as combination member, and is fixed on base Material piece 91.Hook tabs 92 is provided with the region of combination member, and constitutes the engaging portion for being fixed on target portion.Above-mentioned waistline maintaining part It is the region for starting the extension in product width direction from hook tabs 92.
Hook tabs 92 is fixed in substrate sheets 91, is specifically engaged in substrate sheets 91.Hook tabs 92 and substrate sheets 91 it Between engagement the rigidity of magic tape 90 will not preferably be increased to more than desirable degree.Specifically, hook tabs 92 and base material Piece 91 is engaged preferably with the hot-melt adhesive discontinuously applied as point-like, wire or helical form.Additionally, Hook tabs 92 and substrate sheets 91 can also be engaged by heat-sealing etc..
Substrate sheets 91 are made up of 1 non-woven fabrics or more than two multiple non-woven fabrics for overlapping are constituted.As substrate sheets 91, the non-woven fabrics using the manufacture of the manufacture method such as spunbond (SB) or spunbond-melt blown-spunbond (SMS) can be used.Constitute base The weight per unit area summation of weight per unit area (in the case of multiple be) of the non-woven fabrics of material piece 91 is 30g/m2~ 120g/m2, preferably 40g/m2～90g/m2。
Surface of the target portion 95 located at the non-skin contact side of the outer load 60 of front waist region.Target portion 95 is viscous to tangle The mode of the combination hook of cingulum is constituted, and as hook and ring group into locking system ring function.As target portion 95, example If using hot-wind nonwoven cloth.
Target portion 95 for example can use by polyolefin thermoplastic synthetic resin fiber make fabric nonwoven cloth or The thermoplastic synthetic resin film of person's polyolefin.In addition, the thermoplastic synthetic resin formation that can utilize polyolefin is arranged on The ring of target portion.
And, as target portion 95, it is also possible to using fluffy non-woven fabrics, the non-woven fabrics are by the way that its local embossing is prevented Only nonwoven surface fluffing.
Additionally, forming the outer load 60 of disposable diaper by using non-woven fabrics, the installation site of magic tape 90 is would indicate that The pattern printing overleaf non-skin contact side of piece 60a or outer load 60 surface, or the sheet material configuration of pattern is existed The non-skin contact side of back sheet 60a or outer load 60, it is also possible to make target portion.
And, rear side leg opening part and by the center in product width direction and parallel with product length direction straight Area between line L1 is than front side leg opening part and by the center in product width direction and parallel with product length direction Straight line L1 between area it is big.Thus, the position of the side rearward of the center in the product length direction than leg opening part The flank of the flank position that extends to side more forward than center in product length direction than leg opening part lean on product Position on the outside of width, the area that can cover body is larger.
Additionally, by the center in product width direction and the straight line L1 parallel with product length direction is referred to by once Center and the straight line parallel with product length direction in the product width direction of property diaper.
The body of wearer is not symmetrical in front and back, and the surface area of the surface area ratio veutro of dorsal part is big.This is due in dress There is buttocks on the outside of the dorsal part of person.In addition, in the state of wearer has worn disposable diaper, the product of leg opening part Center on length direction is easily made into position corresponding with the center in the product length direction of the in-leg of wearer.For example, If the center in the product length direction than leg opening part rearward the rear side leg opening part of the position of side and by produce The area between center and the straight line parallel with product length direction on product width is equal to and is located at than leg opening part The front side leg opening part of the position of the forward side in center in product length direction and by the center in product width direction and Area between the straight line parallel with product length direction, or rear side leg opening part and by product width direction Area between the heart and the straight line parallel with product length direction is less than front side leg opening part and by product width direction Center and the straight line parallel with product length direction between area, then cannot be in the way of asymmetrical body before and after covering Configuration disposable diaper, becomes the state tightened at the dorsal part of wearer, or becomes what is crooked at the veutro of wearer State.
If also, the center in the product length direction than leg opening part rearward the flank of the position of side be located at The flank of the position of side more forward than center in the product length direction of leg opening part is located at substantially in product width direction Identical position, becomes the state tightened at the dorsal part of wearer, then the rear waist region side in the state of being worn sometimes The clot youngster of leg opening part 35, the buttocks of wearer exposes.Further, since enough areas of buttocks can not be covered, Therefore sometimes in wearing the product width direction end of rear waist region is involved in inner side, the buttocks of wearer exposes.
However, because the flank of the position of side rearward of the center in product length direction than leg opening part extends Flank to the position of the forward side in center than being located in the product length direction than leg opening part is leaned on the outside of width Position, therefore, it is possible to configure disposable diaper in the way of asymmetrical body before and after covering, and can be with the body of wearer Accordingly configure disposable diaper.
Multiple convex portions in the convex protruded towards on the outside of product width direction are formed with rear side leg opening part 35R 36.Convex portion 36 project to than leg opening part before and after region by the position on the outside of product width direction part.Leg Peristome 35 is the position of the calf circumference that against wearer, and is the part of the inner side for easily entering disposable diaper 10.Thus, lower limb Portion's peristome 35 preferably more broadly covers body, in particular, it is preferred that, rear side leg opening part 35R is with a large scale The mode for covering body is configured.By being provided with convex portion 36, the area of rear side leg opening part 35R parts is increased, and Become outwardly convex by making its shape, can on a large scale cover buttocks.
Also, because stress is easy to concentrate on after rear side leg opening part 35R, particularly rear side leg opening part 35R Portion, it is therefore preferred to, by forming convex portion 36, being previously formed can further disperse the state of the pressure to skin.Specifically Ground says, at the position of the cardinal extremity of close magic tape 90, stress be easy to concentration, and be when disposable diaper 10 is worn sometimes The position for also forward lapping, it is therefore preferred to form convex and allow it to disperse the pressure to skin.
In front side, leg opening part 35F is formed with the recess in the shape being recessed towards on the inside of product width direction.Recess 37 be recessed to than leg opening part before and after region by product width direction inner side part.Because recess 37 is in recessed Shape, is thus susceptible to the groin along wearer.Therefore, flank 70 and leg pars contractilis 75 further fit in wearer, and And, the activity regardless of wearer can make the area from the front waist region 20 of disposable diaper 10 to lower crotch region 25 Domain is stably along body.For example, even if carrying out making the width of absorber 40 in the presence of the activity of the lower limb of wearer Narrow in the case of such activity, recess 37 also persistently fits in groin, and can will not with the width of absorber 40 The mode for narrowing maintains wider state.Except relaxing the pressure to skin, convex portion 36 and recess 37 are also needed to along wearer Body.
(2) structure of leg pars contractilis and buttocks pars contractilis
Leg pars contractilis 75 are being matched somebody with somebody by the position on the outside of product width direction than absorber 40 along product length direction L Put, and can be flexible along product length direction L.
Leg pars contractilis 75 are made up of the elastic component (being in the example in fig 12 elastic components) of predetermined radical.This reality The elastic component for applying mode is made up of polyurethane elastomeric fiber, natural rubber.Buttocks pars contractilis 77 by predetermined radical elastic structure Part (being in the example in fig 11 elastic component) is constituted.The elastic component of present embodiment is by polyurethane elastomeric fiber, natural Rubber is constituted.
In addition, the elastic component for constituting the buttocks pars contractilis 77 of present embodiment is the rubber along product length direction configuration Rubber band.Thus, because the whole region for being provided with buttocks pars contractilis for making flank 70 is equably shunk, and flank 70 can be along wearing The person of wearing with the buttocks heaved, therefore the region clot youngster and can not cover buttocks.
Between the product width direction outboard end and buttocks pars contractilis of magic tape in product width direction apart from La Than between the product width direction center of disposable diaper and the product width direction outboard end of leg pars contractilis 75 in product It is short apart from Lb on width.When disposable diaper is worn on into wearer, to front waist region side stretching magic tape 90, Magic tape is fixed on into target portion 95 of front waist region etc..Now, if magic tape is fixed on into the position of width most inner side Put, then the product width direction center alignment of the product width direction outboard end of magic tape and disposable diaper.In the state Under, disposable diaper becomes the state for being farthest close to wearer.Therefore, when disposable diaper is designed, exist sometimes One is verified at the product width direction outboard end of magic tape and the Centered position of product width direction of disposable diaper Secondary property diaper fits in stickiness of body of wearer etc..
In the case of the such stickiness of checking, because product width direction outboard end and the buttocks of magic tape stretch The product width direction center apart from La than disposable diaper in product width direction and leg pars contractilis 75 between portion It is short apart from Lb in product width direction between product width direction outboard end, therefore in the product width direction of magic tape In the state of the product width direction center alignment of outboard end and disposable diaper, buttocks pars contractilis 77 and leg pars contractilis 75 Overlap.Thereby, it is possible to annularly form rivel along the calf circumference of wearer such that it is able to improve the stickiness of calf circumference.
Thus, using buttocks pars contractilis 77 and leg pars contractilis 75, the leg opening part 35 of disposable diaper can be made attached The calf circumference of wearer is closely fitted in, even if in the case of descending movable leg on the wearer, it is also possible to prevent leg opening part 35 Wrinkle, and prevent the product width direction end crimping in wearing.
Additionally, in the case where the elastic component for constituting leg pars contractilis is many, the product width side of leg pars contractilis Outwards side end refers to the width outboard end positioned at the outermost elastic component of product width direction, stretches leg is constituted In the case that the elastic component in contracting portion is one, the product width direction outboard end of leg pars contractilis refers to the elastic component Width outboard end.
Alternatively, it is also possible to be configured to, as the engaging portion of magic tape hook tabs 92 product width direction outboard end with Between buttocks pars contractilis 77 in product width direction apart from Lc than target portion 95 product width direction medial end and lower limb It is short apart from Ld in product width direction between the product width direction outboard end of portion's pars contractilis.Using such structure, In the state of the width that the hook tabs of magic tape is fixed in the target portion most position of inner side, buttocks pars contractilis 77 and lower limb Portion's pars contractilis 75 overlaps.Thereby, it is possible to annularly form rivel along the calf circumference of wearer, and calf circumference can be improved Stickiness.
Additionally, in the present embodiment, target portion 95, but also can be not connecting dividing right and left in configuration of dividing right and left Continuous mode constitutes target portion.In such target portion 95, there is no the product width direction medial end of target portion 95, if The position of the width that the hook tabs of magic tape is fixed in target portion most inner side, then become the product width direction of magic tape The Centered state of product width direction of outboard end and disposable diaper.Thus it is preferred to be to be configured to, magic tape Between the product width direction outboard end and buttocks pars contractilis 77 of hook tabs 92 in product width direction apart from Lc ratios once Property is between the product width direction center of diaper and the product width direction outboard end of leg pars contractilis in product width direction On it is short apart from Lb.Using such structure, in the width being fixed on the hook tabs of magic tape in target portion most inner side In the state of position, buttocks pars contractilis 77 and leg pars contractilis 75 overlap.Thereby, it is possible to along the calf circumference of wearer be in ring Shape ground forms rivel, and can improve the stickiness of calf circumference.
Center O3 in the product length direction of leg pars contractilis 75 is located at than one under the elongation state of disposable diaper The position of the forward sides of center O1 in the product length direction of secondary property diaper.In addition, under the elongation state of disposable diaper, lower limb Center O4 in the product length direction of portion's peristome 35 is located at and is leaned on than the center O1 in the product length direction of disposable diaper The position of front side.
Thus, by the way that the product of the center O3 in the product length direction of leg pars contractilis 75 and leg opening part 35 is long Center O4 on degree direction is configured at the position of the forward sides of center O1 in the product length direction than disposable diaper, Neng Gou So that the center O3 in the product length direction of leg pars contractilis 75 and the center in the product length direction of leg opening part 35 O4 againsts the mode at the center in the product length direction of body and dresses in the state of disposable diaper, by rear waist region 30 Product length direction L on the length that is arranged in product length direction L than front waist region 20 of length it is long.
As described above, the body of wearer is not symmetrical in front and back, but dorsal part is longer than veutro.For example, if rear waist region Length in 30 product length direction L is identical with the length in product length direction L of front waist region 20, then disposable urine Cloth the lines of asymmetrical body cannot be configured along before and after.
Particularly, in the situation (when particularly lifting lower limb, standing, be seated) of wearer's activity, for the body of wearer Surface skin stroke (variable quantity of length) for, the stroke of dorsal part (buttocks) is bigger than the stroke of veutro.By This, for example, if the length in product length direction L under the naturalness of the rear waist region 30 of disposable diaper 10 with once The length in product length direction L under the naturalness of the front waist region 20 of property diaper 10 is identical, then become in wearer Dorsal part at the state tightened.
However, using the disposable diaper of present embodiment, the rear waist region 30 due to disposable diaper 10 can be made Naturalness under product length direction L on naturalness of the length than the front waist region 20 of disposable diaper 10 under Length in product length direction L is long, therefore, it is possible to rightly cover the hip circumference of wearer.Thus, even if in wearer's activity In the case of, it is also possible to suppress the front waist region 20 and rear waist region 30 of disposable diaper 10 by the skin of wearer Mobile impact and move up such situation in the court along product length direction L, can rightly cover buttocks.
Also, by the way that the product of the center O3 in the product length direction of leg pars contractilis 75 and leg opening part 35 is long Center O4 on degree direction is configured in the position of the forward sides of center O1 in the product length direction than disposable diaper, Neng Gou The position (near veutro) of forward side forms leg opening part.The lower limb of wearer extends towards the direction near the front side of body. Because leg opening part 35 becomes the position of forward side under using the conjugate state of magic tape 90, thus become more suitable for The diaper of the body of wearer.Therefore, in wearing, wearer is easy to movable leg, and rear waist region also can be difficult to tighten.
In addition, buttocks pars contractilis 77 is configured to through lower crotch region 25 and rear waist region 30, the front end of buttocks pars contractilis Portion 77F is located at the position than the side rearward of the center in the product length direction of leg opening part 35.Thus, after leg pars contractilis The portion and region on the outside of product width direction is shunk in the presence of buttocks pars contractilis 77, can be by the leg of rear waist region Nearby (end of the crotch side of buttocks) pulls up peristome towards rear side and width outside.Fig. 4 is to schematically show wearing The figure of the state of disposable diaper.
For example, generally the in-leg of wearer is against in the lower crotch region of disposable diaper when disposable diaper is dressed Under state, disposable diaper is stretched along product length direction, and it is fixed using magic tape etc..Dressed if so, then one Secondary property diaper is stretched between the standing part and lower crotch region of magic tape, and leg opening part 35 sometimes cannot be along wearer Calf circumference configured.
Particularly, compared with the veutro of wearer, the area of the buttocks of buttocks side is larger, it is therefore possible to low back during wearing The product width direction end for enclosing region is involved in inner side, and the local of buttocks is exposed.However, one can be made using buttocks pars contractilis 77 Secondary property diaper is near rear waist region 30 such that it is able to the problem for suppressing the buttocks of wearer to expose.
Preferably, under the elongation state of disposable diaper 10, between buttocks pars contractilis 77 and leg pars contractilis 75 In product width direction apart from D1 be 10mm～30mm.For example, if between buttocks pars contractilis 77 and leg pars contractilis 75 away from From longer than 30mm, then buttocks pars contractilis 77 stretches independently of each other with leg pars contractilis 75, and buttocks pars contractilis 77 stretches with leg Portion 75 is difficult to interlock.However, under the elongation state of disposable diaper 10, in product between buttocks pars contractilis and leg pars contractilis In the case that distance on width is 10mm～30mm, buttocks pars contractilis 77 is easy to interlock with leg pars contractilis 75.For example, It is contemplated that if only buttocks pars contractilis independently shrinks, when diaper is dressed, constriction is involved in inner side, or swings to inner side. However, interlocking by making buttocks pars contractilis and leg pars contractilis, buttocks pars contractilis can be suppressed to swing to inner side.
The distance between a pair of buttocks pars contractilis D11 for length D12 in the product width direction of absorber 150%～ 200%.Specifically, be under the elongation state of disposable diaper between a pair of buttocks pars contractilis apart from D11, absorber 40 Product width direction on length be 100mm～120mm, the distance between a pair of buttocks pars contractilis D11 be 150mm～ 240mm.Flank 70 and buttocks pars contractilis 77 are in by the width center of absorbent commodity and in product length direction Line centered on the straight line L1 of extension is symmetrical.Thus, the product width direction outside of a pair of buttocks pars contractilis 77 and absorber 40 The distance between end D13 becomes more than 25% of the length in the product width direction of absorber.
If the diaper that wearer's dress is so constituted, as the product width direction outboard end of self-priming acceptor is towards width The flank 70 of 25% size of length D12 in the product width direction that width is absorber is extended in degree direction outside, and this prolongs The part stretched out can cover the sidepiece of wearer.
For example, when disposable diaper is designed, it is equal to the length in the product width direction of absorber and heaves with buttocks The distance between summit (X1, X1 shown in Fig. 5), or make the length in the product width direction of absorber than the distance It is long, so that absorber covers heaving for buttocks.Thus, by the way that the distance between a pair of buttocks pars contractilis to be set to the product of absorber 150% of length on product width, absorber does not enter buttocks and can just cover heaving for buttocks.
It is further preferred, that the distance between a pair of buttocks pars contractilis are 200mm～240mm.The summit heaved with buttocks The distance between (X1, X1 shown in Fig. 5) is typically smaller than 200mm in the case of infant.Thus, stretched by making a pair of buttocks The distance between contracting portion is 200mm～240mm, can make buttocks pars contractilis more than summit that buttocks is heaved (X1 shown in Fig. 5, X1 width outside) is configured at, and heaving for buttocks can be covered.
Buttocks pars contractilis 77 is linearly configured along product length direction, and makes flank using buttocks pars contractilis 77 70 shrink along product length direction.Due to buttocks pars contractilis 77 it is linearly, therefore with by buttocks pars contractilis it is curvilinear enter The operation of row configuration is compared, and the arrangement step of buttocks pars contractilis is easier to.Thus, flexible multiplying power in buttocks pars contractilis is stablized. As a result, the inequality of the flexible multiplying power of buttocks pars contractilis can be suppressed, local is suppressed to apply the stress caused by contractility, and energy The problems such as enough suppressing buttocks pars contractilis clot youngster.More suitably configure, cover along buttocks thereby, it is possible to form buttocks pars contractilis 77 The state of lid buttocks.
Additionally, carrying out the measurement of " length " in this specification by following measuring method.
Using following sample, the sample is, in the case where disposable diaper 10 is sealing in packaging etc., to take out from packaging Disposable diaper 10, is placed 12 hours in the environment of 20 DEG C ± 2 DEG C, 60% ± 5%RH of relative humidity with the state and is obtained 's.
Next, using affine elastic tape measure (the tape portion for determining Co. Ltd. system of Japan：With glass fibre as base material, With polrvinyl chloride as coating), along measurement object position, measure the length under the state of disposable diaper 10, that is, measure Length under the naturalness of the leg pars contractilis 75 of disposable diaper 10.In addition, the length under elongation state is measured one Secondary property diaper 10 extends to the leg when state less than the fold caused by elastic component is recognized by range estimation from naturalness Obtained from the length of pars contractilis 75.
Herein, above-mentioned measurement is carried out in the state of each to 10 samples, using the meansigma methodss as length.Based on such as The length that this measurement is obtained, being capable of reference area.
Leg opening part 35 is in the convex from product width direction outside towards product width direction inner side protrusion, once Property diaper 10 elongation state under leg opening part 35 at be located at product width direction most inner side position medial end 35I With the distance between leg pars contractilis 75 D2 than the distance between leg pars contractilis and buttocks pars contractilis in product width direction It is short, and for below 15mm.
If under the elongation state of disposable diaper 10, medial end 35I and the leg pars contractilis 75 of leg opening part 35 The distance between it is longer than 15mm, it is likely that the contractility caused by leg pars contractilis 75 cannot be applied to leg opening part 35 Medial end, so as to using leg pars contractilis 75 leg opening part 35 be made rightly to shrink.In addition, leg opening part 35 Medial end 35I is to clip and be close to the part of wearer by the lower limb of wearer in the state of by dress.By making leg The distance between medial end 35I and leg pars contractilis of peristome 35 are below 15mm, can at least make leg opening part The portion retracts being close to wearer, and the calf circumference along wearer configured.
The receipts in ruffle shape shunk in the presence of leg pars contractilis 75 and buttocks pars contractilis 77 are formed with flank 70 Contracting portion.Using leg pars contractilis 75 and buttocks pars contractilis 77 contraction flow region of ruffle shape can be made to be close to body.Further, since lower limb It is located at the distance between medial end 35I and leg pars contractilis by the product width direction most position of inner side at portion's peristome to compare Leg pars contractilis are short with the distance between buttocks pars contractilis, and hence with leg pars contractilis the medial end of leg opening part is suppressed Crimping, in from lower crotch to the region of rear waist region configure buttocks pars contractilis, it is easy to maintain flank is configured with buttocks The shape that the whole region of pars contractilis has been unfolded.
It is additionally, since the ruffle formed using leg pars contractilis 75 and buttocks pars contractilis 77 to stretch along product length direction Contracting, therefore ruffle (fold) is along product width direction stretching, extension.The ruffle (fold) becomes support such that it is able to prevent rear waistline area The product width direction end in domain is involved in width inner side.
In addition, buttocks pars contractilis 77 both can be in the region that whole region is retracted position, or its both ends For non-telescoping state.For example, by region by the both ends of buttocks pars contractilis 77 (region of 2mm～10mm, more preferably The region of 2mm～5mm) non-telescoping state is set to, can be formed about inhibiting the shape of fold in rear side leg opening part 35R State.Thus, can more seamlessly along body near rear side leg opening part 35R.In addition, passing through not in buttocks pars contractilis 77 end arranges the bonding agents such as HMA bonding agents, and the end that can make the buttocks pars contractilis 77 of rear side leg opening part 35R is located Edge it is soft.
Under the naturalness of disposable diaper 10, the medial end 35I of leg opening part is located on centrage L2, in this Heart line L2 is by the center between leg pars contractilis and buttocks pars contractilis in product width direction and along product length direction. Using such structure, leg pars contractilis and buttocks pars contractilis can be utilized to pull up the medial end of leg opening part, and energy Enough prevent the crimping of the medial end of leg opening part.Medial end thereby, it is possible to make leg opening part is carried out along body Configuration.
Leg pars contractilis 75 are configured between flank 70 and outer load 60.Or, possess be configured at absorber 40 with it is outer In the region of the back sheet 60a between load 60, leg pars contractilis 75 are configured between back sheet 60a and flank 70.
The percentage elongation of leg pars contractilis 75 is preferably 1.7 times～2.4 times.In the present embodiment, leg pars contractilis 75 Percentage elongation is set to 1.9 times～2.2 times.Additionally, percentage elongation means the degree of the elongation of leg pars contractilis, it is stipulated that be with It is lower such.
Percentage elongation=(length of the leg pars contractilis under elongation state) ÷ (leg pars contractilis length in its natural state Degree)
Additionally, in this manual, for example the percentage elongation is measured as next.
1st, in the case where disposable diaper 10 is enclosed in packaging etc., from packaging disposable diaper 10 is taken out.Then, The configuring area of clip leg pars contractilis.Now, also by comprising being cut in the way of the outer load that leg pars contractilis are engaged Cut.The percentage elongation of the sample of the leg pars contractilis after measurement clip, so as to measure the percentage elongation of leg pars contractilis.
For each sample, place 60 minutes in the environment of 20 DEG C ± 2 DEG C, 60% ± 5%RH of relative humidity, along flexible The length of orientation measurement leg pars contractilis.Using the length as " leg pars contractilis length in its natural state ".
2nd, the length in telescopic direction and target area under the state (i.e. naturalness) of measurement target region from Naturalness is extended on non-telescoping sheet material by estimating when confirming the state less than the fold caused by elastic component Length in telescopic direction.Using the length as " length of the leg pars contractilis under elongation state ".
Carry out calculating to measure percentage elongation with above-mentioned formula by using these measurement results.
(3) shape of crotch pars contractilis
Next, illustrating to the shape of crotch pars contractilis 200.Crotch pars contractilis 200 is configured to disposable in dress Flat shape can be maintained during diaper in the local of lower crotch region compared with the other parts of absorber 40.Crotch pars contractilis 200 are configured to be stretched at least in product length direction L or product width direction W.
For example, crotch pars contractilis 200 is arranged independently of each other with leg pars contractilis 75, in crotch pars contractilis 200 and absorption Property core 40a overlapped position (in the present embodiment, the core covering 40b of back sheet 60a and cladding absorbent core 40a Between position) on, make the Length Contraction more than 60% in product width direction W of the absorbent core 40a at the position.Such as This, the portion retracts for being configured with absorbent core 40a are made by using crotch pars contractilis 200, and absorbent core 40a shrinks, with absorption Property the non-shrinking parts of core 40a compare and be easy to keep flat shape.
On the other hand, positioned at front waist region, the rear waist region leaned on the outside of product length direction than crotch pars contractilis 200 Absorbent core 40a not in the presence of crotch pars contractilis 200 shrink.Therefore, it is being held in wearer's using magic tape In the state of waist, waistline, the crotch pars contractilis 200 for being maintained flat shape in the lower crotch of disposable diaper is not excessively tight Body next to the skin, as a result, crotch pars contractilis 200 is rightly configured along body.
In addition, in the case where crotch pars contractilis 200 can stretch along product length direction L, the He of front waist region 20 Rear waist region 30 is easy to be erected in the presence of the contraction of crotch pars contractilis 200, can be in the in-leg of wearer when wearing Portion forms flat lower crotch region along body.
As a result, because front waist region 20 and rear waist region 30 erect from crotch pars contractilis 200, therefore disposable urine The stickiness of the laminating wearer of cloth 10 is improved.
That is, using the contraction of crotch pars contractilis 200, wearer can be configured at the lower crotch region 25 of disposable diaper 10 Lower crotch mode, stably dress disposable diaper 10.
And, crotch pars contractilis 200 can also with the center O1 in product length direction L of disposable diaper 10 to The mode that the side of front waist region 20 and the side of rear waist region 30 extend is constituted.
In addition, the center O2 in product length direction L of crotch pars contractilis 200 is configured in the product than disposable diaper 10 The position of the forward sides of waist area 20 of center O1 on product length direction L.
On the other hand, in the situation (when particularly, standing, being seated or lift lower limb under the attitude of recumbency) of wearer movement Under, for the stroke (variable quantity of length) of the skin on the surface of the body of wearer, the stroke of dorsal part (buttocks) It is bigger than the stroke of veutro.
By the way that the center O2 in product length direction L of crotch pars contractilis 200 to be configured at the product than disposable diaper 10 The position of the forward sides of waist area 20 of center O1 on product length direction L, under the naturalness of disposable diaper 10 can be made Length in product length direction L of rear waist region 30 is longer than the length in product length direction L of front waist region 20.By This, even if in the case of wearer movement, it is also possible to suppress the front waist region 20 and rear waist region of disposable diaper 10 30 are affected by the motion of the skin of wearer and such situation are moved in the direction along product length direction L.
Preferably, crotch pars contractilis 200 is made up of Stretchable sheet.
Crotch pars contractilis 200 is constituted by using Stretchable sheet, the absorbent core in the region of Stretchable sheet is configured with 40a is equably shunk, it is easier to keep flat shape.Additionally, Stretchable sheet for example can by with leg pars contractilis 75 Identical Stretchable sheet is constituted.
Alternatively, it is also possible to substitute the Stretchable sheet, a plurality of it is made up of polyurethane elastomeric fiber, natural rubber by configuring Thread, banding elastic component constituting crotch pars contractilis 200.In this case, in order to make suction using crotch pars contractilis 200 Receive property core 40a equably shrink, the interval between elastic component can be set to below 7mm, be more preferably set to 5mm with Under.In addition, in order that absorbent core 40a equably shrinks, preferably the difference at the interval between adjacent elastic component is set For below 2mm.
In addition, in particular, it is preferred that, the percentage elongation of crotch pars contractilis 200 is more than 1.2 times, less than 1.8 times. In present embodiment, the percentage elongation of crotch pars contractilis 200 is set to 1.4 times.Percentage elongation is meant that crotch pars contractilis 200 The degree extended in telescopic direction (product length direction L), it is stipulated that for following.
Percentage elongation is meant that the crotch pars contractilis 200 in telescopic direction (in the present embodiment, product length direction L) The degree of upper elongation, it is stipulated that for following.
Percentage elongation=(length in telescopic direction under the at utmost elongation state of crotch pars contractilis 200)/(crotch is stretched The length in telescopic direction under the naturalness in contracting portion 200)
Additionally, the measurement of percentage elongation is identical with above-mentioned leg pars contractilis, omit the description.
By the way that the percentage elongation of crotch pars contractilis 200 is set to into less than more than 1.2 times 1.8 times, dress can be suitably followed The skin of person it is flexible.
For example, if wearer takes body front side to roll up such anteflexion posture, in the skin of the buttocks side of wearer There is the position that 30% size is extended relative to the state for having stretched body at skin.
If that is, the percentage elongation of crotch pars contractilis 200 is set to less than 1.2 times, the nature of crotch pars contractilis 200 Contraction under state is insufficient, compared with the situation of crotch pars contractilis 200 is not provided with, the absorption at the crotch of disposable diaper 10 The contraction of body region is less, and flat shape is formed in the way of along body in the crotch of wearer becomes insufficient.
On the other hand, if the percentage elongation of crotch pars contractilis 200 is set to more than 1.8 times, the contraction of crotch pars contractilis 200 Contraction on direction is oversized, therefore there is the region of crotch pars contractilis 200 and be easily made into the more great Cheng compared with along body The state that degree is close to, disposable diaper 10 is easy to deviate to the lower section of wearer.
Furthermore it is possible to be configured to, the amount of contraction in product length direction L of crotch pars contractilis 200 is disposable diaper 10 Product length direction L on length 2%～8%.
Additionally, amount of contraction be extend to fold fully diminish, the surface of sample it is almost smooth in the state of length " b (mm) difference of the length " a (mm) " in the direction along the telescopic direction of sample " and under naturalness, can pass through (b-a) To calculate.
The present inventor confirms：If the amount of contraction in product length direction L of crotch pars contractilis 200 is set to 2%～8% of length in product length direction L of disposable diaper 10, then be worn on wearer by disposable diaper 10 During, crotch pars contractilis 200 is easy to suitably along the body of wearer.
Herein, if making the amount of contraction in product length direction L of crotch pars contractilis 200 more than 8%, crotch pars contractilis 200 exceedingly reduce, the curtailment in product length direction L of disposable diaper 10, cause to be difficult to disposable diaper 10 It is through on the body of wearer or the body of disposable diaper 10 and wearer is exceedingly close at lower crotch region 25 and is held Easily deviate.
On the other hand, if making the amount of contraction in product length direction L of crotch pars contractilis 200 less than 2%, it is difficult to embody Make the effect of crotch pars contractilis 200 as body of the disposable diaper 10 near wearer itself.
In addition, the center configuration in product length direction L of crotch pars contractilis 200 is in longer than the product of disposable diaper 10 The position of the forward side of waist area 20 in center on degree direction L.In addition, crotch pars contractilis 200 is with through disposable diaper 10 The mode at the center in product length direction L is configured.
In this case, it is firm with other components for constituting disposable diaper 10 for the rigidity for considering absorbent core 40a Degree, can suitably select thickness, the pitch of configuration of used elastic component, it is preferred that making disposable urine When the main body of cloth 10 is naturalness (non-elongate state), the side edge part whole region in product width direction W of absorbent core 40a Become contracted state.
In addition, the lower crotch region 25 in absorber 40 forms jagged 115 (breach 125).Breach 115 and breach 125 are There is no the region of the absorbent core 40a for constituting absorber 40.In the present embodiment, breach 115 and breach 125 are equivalent to suction The low low rigidity portion of the weight per unit area of the other parts of the weight per unit area than absorbent core 40a of the property received core 40a.This Outward, it is also possible to which replacement forms breach 115 and breach 125, and the region of breach 115 and breach 125 is set to into absorbent core 40a's The weight per unit area of other parts of the weight per unit area than absorbent core 40a is low.
Breach 115 and breach 125 exist along the edge in product length direction L of crotch pars contractilis 200.Additionally, excellent Choosing, even if forming jagged 115 and breach 125, positioned at front waist region 20 and the absorbent core 40a of rear waist region 30 It is not completely severed with the absorbent core 40a positioned at lower crotch region 25, it is continuous particularly in product width direction.
With going to the outside in product width direction W, the length in product length direction L of breach 115 and breach 125 (naturalness of disposable diaper 10) is elongated.It is outer in product width direction W of absorbent core 40a using such shape Side is easily shunk, therefore flat " bottom " is more readily formed.And, positioned at than breach 115 near front waist region 20 The absorbent core 40a of position and erect from " bottom " positioned at the absorbent core 40a than breach 125 near rear waist region 30, It is easy to the curved along the body (abdominal part and buttocks) of wearer, the shape therefore, it is possible to make disposable diaper itself more connects The bodily form of nearly wearer.
In addition, the front waist region 20 (rear waist region 30) of breach 115 (breach 125) edge nearby is arc-shaped. The edge of breach 115 (breach 125) is that circular arc is centrally located at than the edge rearward waist area 30 (front waist region 20) Shape as position.Using such shape, it is easy to produce easily and significantly more the curve along the body of wearer Deformation.
Width in product width direction W of crotch pars contractilis 200 is the area of the presence crotch pars contractilis of absorbent core 40a More than 1/2 of width in product width direction W of the absorbent core 40a in domain.
Thus, make to be configured with more than the position of absorbent core 40a contraction one fixed width by using crotch pars contractilis 200, Absorbent core 40a shrinks, and absorbent core 40a is above carried in the way of near the body of wearer.
By realizing above carrying for such absorbent core 40a in lower gear region, disposable diaper 10 can be reduced with dress Gap between person.Width in product width direction W of crotch pars contractilis 200 is absorber 40 (absorbent core 40a) In the case of more than 60% of width in product width direction W, in the case of more preferably more than 80%, can be further Reduce the gap between disposable diaper 10 and wearer.
If also, the width of crotch pars contractilis 200 is narrow compared with the width of absorbent core 40a, being difficult to obtain above-mentioned The effect for above carrying absorbent core 40a.On the other hand, if the width phase of the width of crotch pars contractilis 200 and absorbent core 40a Than wide, then in the position shape more more contracted than the position for being configured with absorbent core 40a for not configuring absorbent core 40a Disposable diaper 10 is dressed under state.Thus, in the case where the component for constituting the position for not configuring absorbent core 40a is overlapped, crotch Portion's pars contractilis 200 is hardened, and compromises the wearing feeling of disposable diaper 10.
For example, it is preferable that in the region of the presence crotch pars contractilis of absorbent core 40a the most narrow position of width chi Very little (under elongation state) is in the case of 120mm, the width of crotch pars contractilis 200 is 60mm～110mm.It is further preferred that crotch The width of portion's pars contractilis 200 is preferably 90mm～110mm.
Preferably, the most narrow position of width in product width direction W of absorbent core 40a is located at than product length side To the position of the forward side 10mm～60mm of centrage.Preferably, the width in product width direction W of absorbent core 40a is most Narrow position is located at the position of side 20mm～40mm more forward than product length direction centrage.Preferably, crotch pars contractilis 200 The most narrow position of the width that is formed to pass in product width direction W of absorbent core 40a.
The mutually closest position of the huckle of the left and right of wearer is located on the fore-and-aft direction than the body of wearer The forward side in center position.Thus, in the presence of the contractility of crotch pars contractilis 200, can be by the product of absorbent core 40a The most narrow position of width on product width W is energetically configured at the mutually closest position of huckle of the left and right of wearer Put.In other words, even if mother etc. wears auxiliary does not carry out the para-position of absorbent core 40a, the para-position of absorbent core 40a is also certainly It is dynamic to carry out.
(4) manufacture method of disposable diaper
Next, illustrating to an example of the manufacture method of the absorbent commodity of present embodiment.Additionally, for Unaccounted manufacture method in present embodiment, can adopt existing method.In addition, the manufacture method of following explanation is one Son, it is also possible to manufactured by other manufacture methods.The manufacture method of absorbent commodity at least includes constituent part formation process, structure Into part mounting operation, leg enclose formation process and cut off operation.
In constituent part formation process, the constituent part for constituting absorbent commodity is formed.Specifically, for example, Stacking absorbing material is so as to coform absorbent body 40.
In constituent part mounting operation, piece is being knitted for constitute back sheet, loaded for constituting leg pars contractilis 75 Stretchable sheet, for constitute positive dough sheet knit the others such as piece knit piece, leakproof sheet material, absorber, leg pars contractilis 75, The grade of buttocks pars contractilis 77 is used to constitute the constituent part of disposable diaper 10.
In leg enclose formation process, cutting positive dough sheet 50, outer load 60 and back sheet 60a.Thus, buttocks pars contractilis 77 Leading section 77F be cut off, and formed be configured at wearer calf circumference leg opening part 35.
In cut off operation, the continuum of positive dough sheet 50, back sheet 60a, absorber 40 etc. will be configured with along product width Degree direction W cuts into the size of a product.Thus, disposable diaper 10 is manufactured.
(5) other embodiments
As described above, present disclosure, but of composition the disclosure are disclosed by embodiments of the present invention The discussion and accompanying drawing for dividing should not be construed as limiting the invention.For those skilled in the art, can be clear and definite from the disclosure Various alternate embodiments, embodiment and application technology.
Leg pars contractilis 75 both can align with the bonding part of leg side rivel in product width direction, it is also possible to Configured by the position on the inside of product width direction than the bonding part of leg side rivel.Constitute leg pars contractilis 75 and buttocks The elastic component of pars contractilis 77 both can be 1, or more than 2.
In addition, in the above-described embodiment, it is illustrated by taking disposable wearing article as an example, but the present invention also can Enough it is applied to Breeches type disposable diaper.With regard to being used to form the outer layer sheet of front waist region and rear waist region by engagement Left and right sides edge and there is the pants-shaped diaper of waistline peristome and a pair of leg opening parts, front waist region and low back Enclose region outer layer sheet have can along product width direction W shrink and extend flexible member, by shunk and one Secondary property diaper is held in the waistline of wearer.That is, the left and right sides edge extended along product length direction L engages Scope become waistline maintaining part.
Thus, the present invention includes various embodiments do not recorded herein etc. certainly.Thus, can according to above-mentioned explanation Know, the invention specified features of the technical scope only involved by appropriate patent claims of the present invention are limited.
Additionally, the full content of Japan's patent application 2012-259161 (application of on November 27th, 2012) is used as ginseng According to being incorporated into present specification.
Industrial applicability
One kind can be provided can prevent the product width direction end volume in wearing while buttocks is rightly covered The disposable diaper on side.
Description of reference numerals
10：Disposable diaper；20：Front waist region；25：Lower crotch region；30：Rear waist region；35：Leg opening part； 35F：Front side leg opening part；35R：Rear side leg opening part；35I：Medial end；40：Absorber；40a：Absorbent core； 40b：Core covering；50：Positive dough sheet；60：Outer load；60a：Back sheet；70：Flank；75：Leg pars contractilis；77：Buttocks stretches Portion；77F：Leading section；80：Leg side rivel；81：Elastic component；85：Waistline pars contractilis；90：Magic tape；91：Substrate sheets；92： Hook tabs；95：Target portion；115：Breach；125：Breach；200：Crotch pars contractilis；L：Product length direction；W：Product width side To.

Claims (12)

1. a kind of disposable diaper, wherein,
The disposable diaper has front waist region, rear waist region and positioned at the front waist region and the rear waistline area Lower crotch region between domain,
The disposable diaper have product length direction from the front waist region towards the rear waist region and with it is described The orthogonal product width direction of product length direction,
The disposable diaper possesses：Absorber, its through the lower crotch region and to the front waist region and it is described after waistline At least one of region extends；
Flank, it is configured at than the suction through the front waist region, the lower crotch region and the rear waist region Acceptor is by the position on the outside of the product width direction；And
A pair of magic tapes, from the rear waist region of the flank to product width direction, outside extends for it, and is fixed on institute State front waist region,
Have in the flank：Leg opening part, the central concave in its described product width direction to the absorber；With And leg pars contractilis, it is configured at the position leaned on the inside of product width direction than the leg opening part, and long in the product Degree stretches on direction,
The leg opening part has：Rear side leg opening part, it is located at the product length side than the leg opening part The position of the side rearward of center upwards；And front side leg opening part, it is located at longer than the product of the leg opening part The position of the forward side in center on degree direction,
The rear side leg opening part and by the center in the product width direction and parallel with product length direction straight Area between line is more than the front side leg opening part and by the center in the product width direction and along the product Area between the straight line that length direction extends,
A pair of buttocks pars contractilis are configured with the position than the leg pars contractilis by two outsides in the product width direction, A pair of buttocks pars contractilis are configured to through the lower crotch region and the rear waist region, and are stretched along the product length direction Contracting,
Between the product width direction outboard end of the magic tape and the buttocks pars contractilis in the product width direction Distance than outside the product width direction center of the disposable diaper and the product width direction of the leg pars contractilis Distance between side end in the product width direction is short.
2. disposable diaper according to claim 1, wherein,
The disposable diaper is also equipped with the target portion for fixing the magic tape in the front waist region,
The magic tape possesses the engaging portion for being fixed on the target portion,
In the product between the product width direction outboard end of the engaging portion of the magic tape and the buttocks pars contractilis Distance on product width is than the product width direction medial end of the target portion and the institute of the leg pars contractilis The distance stated between product width direction outboard end in the product width direction is short, or than the disposable diaper In the product width between product width direction center and the product width direction outboard end of the leg pars contractilis Distance on direction is short.
3. disposable diaper according to claim 1 and 2, wherein,
The distance between the pair of buttocks pars contractilis is 150% of the length in the product width direction of the absorber ～200%.
4. disposable diaper according to claim 3, wherein,
The distance between the pair of buttocks pars contractilis is 200mm～240mm.
5. disposable diaper according to claim 1 and 2, wherein,
It is centrally located in the product length direction of the buttocks pars contractilis longer than the product of the leg pars contractilis The position of the center side rearward on degree direction.
6. disposable diaper according to claim 1 and 2, wherein,
The buttocks pars contractilis is linearly configured along the product length direction.
7. disposable diaper according to claim 1 and 2, wherein,
The product length side at center and the leg opening part in the product length direction of the leg pars contractilis The position of the forward side in center being centrally located at upwards in the product length direction than the disposable diaper.
8. disposable diaper according to claim 1 and 2, wherein,
Distance between the buttocks pars contractilis and the leg pars contractilis in the product width direction is 10mm～30mm.
9. disposable diaper according to claim 1 and 2, wherein,
The leg opening part is in the convex from product width direction outside towards product width direction inner side protrusion,
The leg pars contractilis lean on the medial extremity of the product width direction most position of inner side with being located at the leg opening part The distance between portion is shorter with the distance between the buttocks pars contractilis than the leg pars contractilis, and for below 15mm.
10. disposable diaper according to claim 9, wherein,
The medial end of the leg opening part is located on centrage, and the centrage is by the leg pars contractilis and the buttocks Center between pars contractilis in product width direction and along the product length direction.
11. disposable diapers according to claim 1 and 2, wherein,
In the rear side leg opening part is formed with convex portion, and the convex portion is in towards the convex of product width direction outside protrusion Shape.
12. disposable diapers according to claim 1 and 2, wherein,
Recess is formed with the front side leg opening part, the recess is in the shape towards product width direction inner side depression Shape.
CN201380061623.3A 2012-11-27 2013-11-27 Disposable diaper Active CN104822348B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012259161A JP6118083B2 (en) 2012-11-27 2012-11-27 Disposable diapers
JP2012-259161 2012-11-27
PCT/JP2013/081854 WO2014084230A1 (en) 2012-11-27 2013-11-27 Disposable diaper

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JP6118083B2 (en) 2017-04-19
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BR112015012214A2 (en) 2020-01-07
WO2014084230A1 (en) 2014-06-05

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