CN101410034B - Disposable diaper - Google Patents

Disposable diaper Download PDF

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Publication number
CN101410034B
CN101410034B CN2007800108137A CN200780010813A CN101410034B CN 101410034 B CN101410034 B CN 101410034B CN 2007800108137 A CN2007800108137 A CN 2007800108137A CN 200780010813 A CN200780010813 A CN 200780010813A CN 101410034 B CN101410034 B CN 101410034B
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China
Prior art keywords
disposable diaper
hair
hook
covering piece
flooring
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CN101410034A (en
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宇都宫毅
鸟越启滋
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Daio Paper Corp
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Daio Paper Corp
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Priority claimed from JP2006101165A external-priority patent/JP4417921B2/en
Application filed by Daio Paper Corp filed Critical Daio Paper Corp
Priority claimed from PCT/JP2007/057280 external-priority patent/WO2007114387A1/en
Publication of CN101410034A publication Critical patent/CN101410034A/en
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  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

A fastening type disposable diaper with improved fastening ability. A disposable diaper has an engagement section constructed such that the strength against separation between the engagement section and a fastening tape is stepwise or continuously reduced from the center in the lateral direction of the product toward both left and right side edges. Alternatively, the disposable diaper has an engagement section constructed from a female member sheet formed such that female-shape elements of a female base sheet are exposed from holes (21a, 21a) of a perforated cover sheet (21).

Description

Disposable diaper
Technical field
The present invention relates to disposable diaper, especially, relate to restraint zone that the left and right sides edge part with the either party in dorsal part or veutro portion sets is engaged in the deploying type of dressing on the junction surface that sets between the left and right sides edge part of the veutro portion of correspondence or drosal part disposable diaper.
Background technology
The known disposable diaper that following deploying type is arranged: described disposable diaper have liquid permeability surface patch, opaque liquid back sheet and be installed in absorber between two, the restraint zone of the left and right sides edge part by will being provided in drosal part is fastened on the fastening part in the precalculated position that is equipped on veutro portion and dresses.
In this disposable diaper, exist employing face deduction structure to be used as the disposable diaper of retention mechanism, described deduction structure is with whole or a part of hook floorings as the face button of restraint zone, and, on the precalculated position of veutro main part, spread all over the bonding hair side material piece of width and form the junction surface, with the crimping of described hook flooring be bonded on carry out on the hair side material as the junction surface fastening.
In recent years, it is also known for the disposable diaper that adopts the face deduction structure that is called as driftlessness band (target tape less), described deduction structure is not that bonding hair side material piece forms the junction surface, but constitute the outer surface side of back sheet with non-woven fabric plate, and spread all over width on the veutro main part of sheet overleaf and carry out embossing processing etc., with back sheet itself as the junction surface.
For the disposable diaper that has adopted such face deduction structure, though when dressing, carry out restraint zone joint, peel off, engaging force does not reduce substantially yet, and, can carry out fasteningly with suitable shearing force, it is excellent to dress sense.
On the other hand, in the disposable diaper that uses this button, for corresponding with the action of wearer, usually constitute: make the wing (flap) that is bonded with restraint zone have retractility, perhaps make restraint zone itself have retractility, perhaps make the junction surface form the zone and have extensibility, thereby so that abdominal circumference has the retractility wearer moves easily.And even do not give retractility so energetically, the also stretching, extension of the formation sheet material that produces by the action of following wearer etc. makes abdominal circumference significantly flexible.
But, the junction surface of disposable diaper in the past constitute with the hook flooring between peel strength not different and different because of the position, for example,, when the central part layback is dragged restraint zone and it is engaged,, the contractility of restraint zone etc. come off easily when wanting to dress more tightly thereby acting on joint strongly; On the contrary, dress and when restraint zone is bonded on position near sidepiece, engage with unwanted intensity than loose ground when wanting thereby the contractility of restraint zone is inoperative substantially.
And then, in this structure, when wanting to guarantee sufficient engagement state required under the state that abdominal circumference stretches, can only constitute and strengthen constituting the hair side material piece at junction surface or the peel strength between embossed area and the restraint zone, perhaps constitute restraint zone or flank are extended easily to relax the stretching force of abdominal circumference, but under the mode of strengthening peel strength, be not easy to engage again restraint zone, thereby the advantage of face button reduces, on the contrary, if weaken the stretching force of abdominal circumference, thereby then front and rear body partly is easy to generate the reason that skew becomes the generation leakage.
And, for example,, and produce the situation that front and rear body partly is offset continually sometimes because the shape of the abdominal circumference that causes by age of wearer etc. or action such as stand up, at this moment, the most situation of restraint zone can be stripped from towards the product length direction.Thereby compare with the width central part of product this moment, and width both sides of the edge portion is big at the offset amplitude of front and rear body part, and therefore, more difficult the peeling off of width both sides of the edge portion compared in expectation with the width central part of product.
Yet, the face button is that hair side material piece and the crimping of hook plane materiel tablet are engaged and the joint elements of performance bonding force, described hair side material piece has fiber is formed ring-type or arciform hair linear element, described hook plane materiel tablet has the fluffing shape hook elements of the hook-type that engages with described hair linear element or mushroom swollen capitiform etc., the face button engages easily, peels off, and has a suitable engaging force, therefore as explained above, in various fields, use with parts etc. as the fastening of disposable diaper etc.
For the hair side material piece of this face button, in the past,, utilized topographic feature ring formation such as acupuncture (needle-punch), spunbond (spunbond), water thorn (spunlace) or thermal contraction etc. by to using the non-woven fabrics of synthetic resin fibers such as nylon, polyester.
And then, in this hair side material piece that comprises synthetic resin fiber,, pass the patterned roll or the knurling rolls of heating in order to adjust engaging force and to prevent the fluffing of fiber, make the fusion partly of mao linear element.
But, for this make mao linear element partly fusion adjust the hair side material piece of engaging force because the puddle sclerosis, thus when being used for disposable diaper etc., have the sense of hardening with article that skin contact, because of rather than preferably.And then, owing to need thermal source during fabrication, so energy needed is many, production cost also uprises.
And,, therefore have the shortcoming that can not easily carry out design alteration owing to when design alteration, must change the pattern of roller.
In a single day in addition, owing to carried out just can't carrying out the recovery of engaging force subsequently after the melt process, therefore can't carry out for example only when not needing to engage, suppressing the design of engaging force.
Patent documentation 1: No. 3490608 communique of Japan Patent
Patent documentation 2: Japanese kokai publication hei 9-317 communique
Summary of the invention
Therefore, major subjects of the present invention is: 1) no matter the disposable diaper of the expansion of restraint zone can both become suitable intensity wherein all the time with respect to the restraint location at junction surface engagement state is provided; Further, problem of the present invention also is: 2) a kind of disposable diaper with following face deduction structure is provided, promptly, this face deduction structure does not need to make fibers melt by heat, do not carry out differential hardening and just can adjust engaging force, and can carry out design alteration simply, in addition, can only suppress engaging force when not required; 3) particularly in the disposable diaper of driftlessness band, provide a kind of large-scale design alteration that needn't be accompanied by back sheet and restraint zone just can improve the disposable diaper of engaging force.
The present invention and the action effect thereof that have solved above-mentioned problem are as described below.
The described invention of＜first aspect 〉
A kind of disposable diaper, described disposable diaper is the disposable diaper of deploying type, has: the surface patch of liquid permeability; The back sheet of opaque liquid; And be installed in absorber between surface patch and the back sheet,
The left and right sides edge part of either party in dorsal part or veutro portion is equipped with the restraint zone of fastening usefulness, part or all of this restraint zone formed by the hook flooring of face button, this hook flooring is bonded on the junction surface between the left and right sides edge part that is equipped on veutro portion or drosal part and dresses, it is characterized in that
Described junction surface constitutes: be provided with in the mode of extending towards edge, the left and right sides from the width center of product, and with described hook flooring between peel strength from the width central part of product towards left and right sides edge direction and/or from vertical lateral edges of product towards the opposite side edge interim ground or seriality ground different.
(action effect)
When described junction surface is provided with in the mode of extending towards edge, the left and right sides from the width center of product, be formed with the junction surface widely at the front-back of wearer, so bonding operation is easy.
And, the position of engage hook flooring becomes position farthest usually in the junction surface, the influence that the direction stretching of the both sides of the edge to the left and right restraint zone that is subjected to the influence of the stretching, extension of abdominal circumference or the action of wearer and then the build of wearer etc. and causes behind joint produces, thus engagement state inadvertently is disengaged easily is the width central part.
On the other hand, at left and right sides edge part, be difficult to be subjected to so tensile influence in the normal state, the situation that engagement state inadvertently is disengaged can take place hardly, but, because moving of wearer can produce the situation that front and rear body partly is offset continually, therefore in the form that often this thing happens, we can say that the width both sides of the edge portion of product is disengaged than the engagement state of width central part is easier.
Therefore, in the present invention, the junction surface is constituted, different towards interim ground of left and right sides edge direction or seriality ground with peel strength between the hook flooring from the width central part of product.That is, peel strength is reduced or rising towards interim ground of left and right sides edge direction or seriality ground from the width central part.
For being raise, it still makes its reduction, design according to imaginary wearer age and wearing state and to get final product, for example, if the product in the period that baby etc. are failure to actuate substantially, peel strength is reduced towards the width both sides of the edge from central division, thereby the product width direction central part of removing engagement state in the easiest elongation because of abdominal circumference etc. forms firm joint, does not carry out unwanted firm joint at left and right sides edge part, forms the mode that engages easily, peels off.For example, if the child uses diaper, peel strength is raise towards the width both sides of the edge from central division get final product.
In addition, make peel strength when left and right sides edge direction reduces or raise, can be to make according to a certain degree scope to reduce interimly, also can be that seriality ground reduces.
And junction surface of the present invention can constitute, with peel strength between the hook flooring from vertical lateral edges of product towards the opposite side edge interim ground or seriality ground different.
The difference of the partial height of peel strength got final product according to imaginary wearer age and the suitable design of wearing state.For example, if be the product of object with the outstanding significantly infant in the top (umbilicus periphery) of abdominal part etc., peel strength is raise towards vertical upside from central division, thereby engage securely near the edge of opening on every side at the easiest waist of removing engagement state because of abdominal pressure, do not carry out unwanted firm joint at hypogastric region, form the state that engages easily, peels off and get final product.If be the product of object, peel strength raise towards vertical downside from central division get final product with underbelly outstanding bigger adult.
In addition, for junction surface of the present invention, also can the difference of the peel strength of above-mentioned width and above-below direction be made up, be in the product of object with child for example, making the peel strength between junction surface and the hook flooring raise and peel strength is raise towards vertical upside towards left and right sides edge direction from central division from the width central part.
The described invention of＜second aspect 〉
According to the described disposable diaper of first aspect, wherein, the hair side material piece of the face button of junction surface by will being formed with a large amount of maos of linear elements is bonded on the back sheet and forms.
(action effect)
Need not make the structural change of diaper body,, just can form the local different junction surface of engaging force by the suitable design of hair side material piece.
The described invention of＜third aspect 〉
According to the described disposable diaper of first aspect, wherein, the part of back sheet itself forms the junction surface.
(action effect)
In the present invention, can be with the part of back sheet self as the junction surface.For example, the outermost layer of back sheet is a non-woven fabrics, and the hair linear element that forms the engage hook flooring on its part is as the junction surface.It is the mode that is called as so-called driftlessness band.As the formation method at junction surface, can adopt embossing processing, ripple processing (ripple processing), utilize pin etc. to make the suitable methods such as processing of fine, soft fur.
, if adopt embossing processing, make peel strength not simultaneously herein, the degree of depth that can be by making embossing or density are different and reach simply.For example, add man-hour when implementing embossing, the hair linear element becomes the state of conquassation.And then peel strength changes according to the situation of this conquassation, but embossing is dark more, close more, thereby the peel strength of this part of hair linear element conquassation is low more.Therefore, utilizing fibre plate such as non-woven fabric plate to form under the situation of driftlessness band of outer surface of back sheet, by make embossing from central part towards the chap of edge, the left and right sides or the embossing degree of depth is shoaled, can make the peel strength difference.
The described invention of＜fourth aspect 〉
According to second aspect or the described disposable diaper of the third aspect, wherein, the difference of density by the hair linear element or height makes them different with peel strength between the hook flooring.
(action effect)
Can constitute simply with the hook flooring between the local different junction surface of peel strength.In addition, so-called hair linear element just is formed in the ring or the bow of the fiber on the composition surface of hair side material.In addition, thus the face button is exactly this ring or bow engages hook flooring and hair side material adhesive parts together with the fluffing shape hook elements of the hook-type of hook flooring or mushroom swollen capitiform etc.
The described invention in＜the five aspect 〉
According to the third aspect or the described disposable diaper of fourth aspect, wherein, give embossing to the hair side material piece or the back sheet that constitute the junction surface, this embossed pattern is the pattern along MD direction or the arrangement of CD direction.
(action effect)
When embossed pattern is during along pattern that MD direction or CD direction are arranged, the fluffing of fiber is few when peeling off restraint zone.MD direction herein is the product fore-and-aft direction, and the CD direction is the product width direction.
The described invention in＜the six aspect 〉
According to the described disposable diaper of either side in second aspect to the five aspects, wherein,
Described junction surface is the hair side material piece of following structure: stacked and bonding porose covering piece with a plurality of hole portion on the hair linear element formation face of the hair side substrate sheets that is formed with a large amount of maos of linear elements forms a face via the hair linear element that exposes from the hole portion of this porose covering piece and engages with the hook flooring; Perhaps
Described junction surface is the part of following formation: utilize the porose covering piece with a plurality of hole portion to coat to comprise fiber by back sheet self to form the scope of the hair side material portion that a plurality of maos of linear elements form, form a face via the hair linear element that exposes from this hole portion and engage with described hook flooring.
(action effect)
In the present invention, only pass through size, number, the pattern of the hole portion of the porose covering piece of change, just can adjust engaging force extremely simply.And,, therefore have the sclerosis part that spreads all over wide scope that is used to adjust engaging force hardly owing to do not make hair side substrate sheets or the fusion of hair side base material portion with mao linear element.Further, the thermal energy of Xu Yaoing is also less.
Especially, if with non-woven fabrics as the hair side substrate sheets, then can form the hair side material piece at an easy rate, can reduce cost.
The described invention in＜the seven aspect 〉
According to the described disposable diaper in the 6th aspect, wherein, described porose covering piece is bonded on hair side substrate sheets or the back sheet by hot-melt adhesive.
(action effect)
By using hot-melt adhesive, can not form the sclerosis part and bonding two.
The described invention of＜the eight aspect 〉
According to the described disposable diaper in the 6th aspect or the 7th aspect, wherein, porose covering piece has retractility, and bonding with respect to hair side substrate sheets or back sheet part, and by stretching of porose covering piece, thereby each hole portion can enlarge, dwindle.
(action effect)
The present invention constitutes, and hole portion enlarges, dwindles by the retractility of porose covering piece.Therefore, thereby covering piece is stretched can be engaged with the hook flooring under the state that hole portion is enlarged, and, thereby forming the state that porose covering piece is dwindled when not needing to engage can make hole portion dwindle, reduce the part that the hair linear element exposes, therefore can suppress engaging force when not required, engaging force is played a role.In addition, the retractility of preferred especially porose covering piece is an elastic extension.
The described invention in＜the nine aspect 〉
According to the described disposable diaper of either side in the 6th aspect to the eight aspect, wherein, between porose covering piece and described hair side substrate sheets or between porose covering piece and back sheet, be equipped with elastic flexible material.
(action effect)
The present invention is equipped with elastic flexible material between hair side substrate sheets and porose covering piece.Therefore, can form when telescopic material shrinks hair side material piece etc. and shrink and produce fold, thereby hole portion is hidden between this fold, hole portion exposes between the fold when telescopic material stretches.Therefore, the hole portion when stretching of can constituting exposes under the state and engages with the hook flooring, then, the stretching, extension of removing hair side material piece etc. make engage unwanted hole portion be hidden between the fold once more.
The described invention in＜the ten aspect 〉
According to the described disposable diaper of either side in nine aspects, the 6th aspect to the, wherein, described porose covering piece is formed with the hair linear element that engages with the hook flooring in a large number in diaper outer surface side.
(action effect)
Form the two structure that engages with the hook flooring of hair linear element of face and porose covering piece self owing to form the hair linear element that exposes from the hole portion of porose covering piece, so can integrally improve engaging force.In addition, can come the height of engaging force is adjusted according to the formation ratio of hole portion.If is the material with different peel strengths by the hair side substrate sheets that porose covering piece coated with porose covering piece, then can further adjust engaging force effectively.
＜the ten described invention on the one hand 〉
According to the described disposable diaper of either side in second aspect to the ten aspects, wherein, have the described hair side material piece of mao linear element, described hair side substrate sheets, described porose covering piece and as the engaging zones of back sheet and be provided with a large amount of perforates of perforation at least one of the preset range of setting.
(action effect)
The hook flooring of restraint zone is bonded in a large amount of perforates, thereby can improve engaging force.Especially, even the non-woven fabrics of the no volume of low weight per unit area etc. also can be given sufficient engaging force.In addition, can adjust according to the engaging force between the formation ratio of perforate pair and the restraint zone.
＜the ten two described invention in aspect 〉
According to the described disposable diaper of the tenth one side, wherein, form described perforate from the one side side that becomes the diaper inner surface side towards the perforate processing of the one side side that becomes diaper outer surface side by enforcement, and verge of opening erects to the diaper outside.
(action effect)
By the outside face side of verge of opening is erected, thereby tangle the hook key element easily, be easy to generate engaging force.
What as above be described in detail is such, according to the present invention, can provide a kind of disposable diaper of following expansion: the engagement state that where all can become suitable intensity all the time that is fastened on the junction surface, especially, can engage the central part that is disengaged easily in the influence of the stretching, extension that is subjected to abdominal circumference etc. and engage securely, and can not form excessively firm joint at the little left and right sides edge part of removing of probability.
And, can provide a kind of disposable diaper: need and not exist differential hardening just can adjust engaging force based on the fusion of the fiber of heat with following face deduction structure, and can carry out design alteration simply, further, can only suppress engaging force when not required.
Herein, assay method for the peel strength described in the present invention or the description, as long as when each position at junction surface is measured, do not change assay method, then assay method is not particularly limited, in a word, so long as can make hook flooring and hair side material engage after power when peeling off carry out method for measuring and get final product.Especially, narrate in the back for the assay method of suitable peel strength.
And, in this manual, will be called engaging force with respect to the easness of peeling off of the joint at junction surface at the restraint zone under the wearing state sometimes.
Description of drawings
Fig. 1 is the expanded view that first mode of the fastening belt disposable diaper that the present invention relates to is shown.
Fig. 2 is the figure that is used to illustrate the interim difference of peel strength.
Fig. 3 is the figure of the situation that is used to illustrate that peel strength changes continuously.
Fig. 4 is the plane graph of the disposable diaper of second mode.
Fig. 5 is the plane graph of the disposable diaper of Third Way.
Fig. 6 is the sketch map of first mode that the hair side material piece of the face button that the present invention relates to is shown.
Fig. 7 is the cutaway view along the II-II line of Fig. 6.
Fig. 8 is the sketch map of second mode that the hair side material piece of the face button that the present invention relates to is shown.
Fig. 9 is the sketch map of Third Way that the hair side material piece of the face button that the present invention relates to is shown.
Figure 10 is the expanded view that has adopted the fastening-type diaper of the face button that the present invention relates to.
Figure 11 is the plane graph of the disposable diaper of the 6th mode.
Symbol description
X1: junction surface; X2: hair side material piece (junction surface that constitutes by the hair side material piece); Y1, Y2: restraint zone; Z1, Z2, Z3, Z5: disposable diaper; 11: surface patch; 12: back sheet; 12A: opaque liquid diaphragm; 12B, 12C: non-woven fabric plate; E: embossing; ST: veutro length direction ora terminalis; Z: diaper; 20a: hair linear element; 20: the hair side substrate sheets; 21: porose covering piece; 21a: hole portion; 22: hot melt adhesion portion; 14: supplementary plate.
The specific embodiment
Then, on one side below on one side be described in detail embodiments of the present invention with reference to accompanying drawing.
＜the first embodiment 〉
Fig. 1 is the fastening-type disposable diaper Z1 that first embodiment of the present invention relates to.This disposable diaper Z has: the surface patch 11 of liquid permeability that is positioned at the skin side of user; Be positioned at the outside of product, in fact can not make the back sheet 12 of the opaque liquid that liquid sees through; And absorber 13, it is arranged between surface patch 11 and the back sheet 12, for example is rectangle or is preferably hourglass shape and has to a certain degree rigidity, is equipped with restraint zone Y1, the Y2 of fastening usefulness on the edge part of the left and right sides of drosal part.
For this restraint zone Y1, Y2, position on being bonded in edge, the left and right sides and the hook flooring that constitutes the front end position of crawl section all by the face button form, and the junction surface X1 that engages this hook flooring is provided in the outer surface veutro portion of back sheet 12.
Back sheet 12 is wideer than absorber 13, and be the essentially rectangular shape that is formed with the lower limb peripheral edge in the substantial middle portion of length direction, described lower limb peripheral edge forms by edge, the left and right sides is cut into circular shape, in order to improve the skin sense of touch, the outer surface of opaque liquid diaphragm 12A such as polyethylene film is stacked have outside dress use non-woven fabric plate 12B, these all are to carry out crimping formation by the embossing processing of carrying out via hot-melt adhesive etc.Described outer dress non-woven fabric plate 12B constitutes, and the fibrous ring on surface, fiber bend closeer, can not engage with described hook flooring.In addition, in the manner, not necessarily must set non-woven fabric plate, also can only form back sheet by the opaque liquid diaphragm.
Herein, expectation back sheet 12 constitutes and has 0.5～4.0g/100cm 2The moisture permeability of hr, and expectation opaque liquid diaphragm 12A and non-woven fabric plate 12B are that the mode of 115～135g/25mm is bonding with peel strength.In addition, this peel strength refers to, and the back sheet 12 under 25 ℃, the condition of 65%RH is taken a sample 180 ° of peel strengths when an end is peeled off with the speed of 300mm/ branch with width 25mm, length 100mm at the width (laterally) of blank (former anti-).
Opaque liquid diaphragm 12A for using in the sheet 12 overleaf can use the known opaque liquid diaphragm as the back sheet 12 of absorbent commodity, but there is no particular determination.As concrete example, can enumerate various synthetic resin sheets such as polythene strip, polypropylene foil, urethane film, polyethylene terephthalate sheet, and porous synthetic resin sheet that a large amount of small passages form etc. is set on these synthetic resin sheets in order to give aeration.For the thickness and the rigidity of opaque liquid diaphragm, consider the thickness of stacked non-woven fabric plate and rigidity etc., suitably select to get final product according to known benchmark.
For the non-woven fabric plate that uses in the sheet 12 overleaf, can use the known non-woven fabric plate that in the back sheet of absorbent commodity, uses, for example, can use by olefines such as polyethylene or polypropylene, polyesters, the polyamide-based synthetic fibers that wait, staple fibre or CUP regenerated fibers such as (cupra), the net that natural fibers such as cotton etc. form is implemented water acupuncture manipulation (spunlace), spun-bond process (spunbond), hot rolling method (thermalbond), meltblown (meltblown), needle point method (needle-punched), the processing method that thermal contraction method etc. are suitable and the non-woven fabrics that forms.
In processing method, the water acupuncture manipulation be imbued with flexibility, drapability aspect excellence, the hot rolling method at volume big and be imbued with flexibility aspect excellence, can suitably select according to purpose.Herein, non-woven fabric plate also can be stacked non-woven fabric plate, for example can use as raw material and will utilize spun-bond process to form spun-bonded non-woven fabrics (S) layer that net forms and utilize meltblown to form the suitably stacked two-layer above and non-woven fabric laminate that obtains of melt-blown nonwoven layer of cloth (M) that net forms.
On the other hand, junction surface X1 forms by utilizing hot-melt adhesive that common hair side material piece is sticked on the back sheet 12.This junction surface X1 extends setting at the product veutro from product width direction center towards edge, the left and right sides.In addition, in illustrated example, the junction surface forms the rectangle of growing crosswise as optimal way, but is not limited to rectangle.It also can be other shape.The adhering method that is bonded on the back sheet 12 adopts the suitable known method corresponding with used hair side material to get final product.
, constitute to the junction surface X1 characteristic of the manner, and the peel strength between the hook flooring of restraint zone Y1, Y2 changes towards left and right sides edge part from the width central part of product interimly herein.In illustrated example, junction surface X1 is divided into 5 zones, this zone as shown in Figure 2 and the relation of peel strength are such, it is the highest to constitute the peel strength of region D 1 that is positioned at central authorities, and peel strength reduces according to the region D 2 that is adjacent and then with the order of the region D 3 of these region D 2 adjacency.Though can suitably determine the concrete peel strength in each zone,, expect that generally peel strength is at 100gf～1500gf, preferably have difference in the scope at 140～400gf and stage separately.In addition, the not enough 100gf of peel strength then can't engage fully, and when surpassing 1500gf, engaging force is strong excessively, thus engage, fluff easily in the junction surface when peeling off etc.
In addition, the assay method of this peel strength is measured as described as follows.At first,, form the doubling strap of width 25mm * 100mm, restraint zone is sticked on securely an end of this strap strap doubling on width of width 50mm * length 100mm.At this moment, the hook flooring of restraint zone is positioned at the front end position more in the outer part than strap.
On the other hand, be that top mode utilizes the double-sided adhesive band that hair side material of the present invention is sticked on the stainless steel plateform with hair linear element formation face.Further, utilize kraft paper gummed tape (krafttape) that two ends are fixed.
Then, after making the hook flooring and hair linear element formation face contacts, the roller with quality 2kg on them makes a round trip from the strap side, crimping restraint zone and hair side material piece.Further, in 10 seconds of counterweight at the other end suspention 1kg of the opposition side that is pasted with restraint zone of strap,, the pressure contact portion branch engages reliably thereby being applied shearing force.
Subsequently, utilize the other end of the opposition side that is pasted with restraint zone of the anchor clamps clamping stainless steel flat plate of cupping machine and strap.At this moment, making the draw direction of anchor clamps of the other end of the opposition side that is pasted with restraint zone of clamping strap is 90 ° with respect to stainless steel flat plate.
After the mode that with final peel angle is 90 ° like this is arranged on anchor clamps on the cupping machine, peel off the crimping part with the speed of 300mm/min, with the concavo-convex weighted mean measured this moment as peel strength.In addition, measured value is 3～10 times a meansigma methods of effective measured value.And, the mode of the mensuration of CD direction is provided with surveying periodic sample to be determined as CD.In addition, the size of test film is: hook flooring 47mm ± 3mm (MD direction) * 93mm (CD direction), hair side substrate sheets 23.5mm ± 1.5mm (MD direction) * 24mm (CD direction).MD direction herein is the product fore-and-aft direction, and the CD direction is the product width direction.
In addition, in the test of peel strength, use cupping machine (the AUTOGRAPH AGS-G100N that SHIMADZU company makes).
On the other hand, the number of regions at junction surface is not limited to 5 zones of illustrated example, both can be 3 zones, also can be 5 more than the zone.But,, be contemplated to be the zone of the size that can take in the hook flooring that is formed on the restraint zone as long as peel strength is reduced interimly.
In addition, in the present embodiment, constitute and be positioned at that to become the zone peel strength each other of the symmetric position of line about product width direction centrage identical, but might not be identical.
In addition, the relation between the peel strength that also can be as shown in Figure 3 and the position at junction surface constitutes like that, setting area not, but peel strength is reduced towards both sides of the edge continuously from the central part of product width direction.
And junction surface X1 is preferably designed to, no matter the shearing force between which zone and the hook flooring of restraint zone is 1kg～10kg all, is preferably 3kg～8kg.If less than 1kg then engage easily and be disengaged, when above 10kg, engaged strong on the contrary.
In addition, the assay method of this shearing force is as described below measures.At first, be that top mode utilizes the double-sided adhesive band that hair side material piece of the present invention is sticked on the stainless steel plateform with hair linear element formation face.Further, utilize kraft paper gummed tape that two ends are fixed.At this moment, the residual blank that stainless steel plateform is arranged on every side of hair side substrate sheets.
Then, with after described hair linear element formation face contacts, the roller with quality 2kg on them makes a round trip from the strap side, crimping hook flooring and hair side substrate sheets at the hook flooring that makes restraint zone.
Then, utilize the blank parts of anchor clamps clamping stainless steel flat plate of cupping machine and an end of restraint zone.Clamping this moment spacing is 50mm.After finishing clamping like this,, measure maximum shear stress with the speed of draw speed 30mm/min shear direction stretching clamp to hook flooring and hair side substrate sheets.In addition, measured value is 3～10 times a meansigma methods of effective measured value.And, the mode of the mensuration of CD direction is provided with surveying periodic sample to be determined as CD.In addition, the size of test film is: hook flooring 47mm ± 3mm (MD direction) * 93mm (CD direction), hair side substrate sheets 23.5mm ± 1.5mm (MD direction) * 24mm (CD direction).MD direction herein is the product fore-and-aft direction, and the CD direction is the product width direction.
On the other hand, constitute junction surface X1 the face button the hair side material by have be suitable for be arranged on restraint zone Y1, Y2 on the tablet of mao linear element that engages of hook flooring constitute, can carry out suitable processing to the known various hair side material tablets in the example in the past and wait and use.
The hair side material piece for example can be used following sheet material: to be formed with weaving cotton cloth of a plurality of ring-types or arciform hair linear element on a face; The net that is formed by natural fibers such as synthetic fibers, regenerated fiber, cotton etc. is implemented suitable processing method such as water acupuncture manipulation and on single face, is formed the non-woven fabrics of a plurality of ring-types, arciform mao linear element significantly; Perhaps this non-woven fabrics is sticked on the sheet material that forms on the matrix material sheet.
For stage or the successional difference of each regional peel strength of reaching junction surface X1 as mentioned above, for example can use the different hair side material of density of hair linear element herein, at each zone.And, also can be by each zone of a slice hair side material piece being carried out embossing processing etc. and moderately conquassation hair linear element reach.
On the other hand, part or all the hook flooring of face button that constitutes restraint zone Y1, Y2 is made of hook plane materiel tablet, and described hook plane materiel tablet has the shape hook elements of fluffing such as the hook-type that engages with the hair linear element of the hair side material that uses or mushroom swollen capitiform in the junction surface.The method of utilizing this hook plane materiel tablet to make restraint zone adopts known method.Be not particularly limited.And the pass between basis such as the size of the fluffing shape hook elements of hook-type or mushroom swollen capitiform etc., density and the hair side material ties up to suitably to be selected in the scope that becomes suitable peel strength to get final product.
On the other hand, though do not illustrate, the disposable diaper Z1 of the manner constitutes, and is equipped with the rubber covered wire of the elastic extension of many directions extensions between restraint zone, and is flexible between restraint zone Y1, the Y2 of dorsal part.Thus, enlarged the fastening permissible range of restraint zone Y1, Y2 when fastening, thus enlarged based on the difference of the build of wearer can fastening permissible range.And, the fit sense when also having improved wearing by stretching.
Can be not do not make between restraint zone Y1, the Y2 of dorsal part flexible by rubber covered wire yet, clamp suitable extensible members such as elastic material sheet but constitute between the leading section of restraint zone Y1, Y2 and cardinal extremity, and set the hook flooring of face button in the front of this extensible member that clamps, thereby make restraint zone Y1, Y2 itself flexible.
In addition, also can constitute extensible members such as between the so-called flank part of bonding restraint zone Y1, Y2 and other parts, clamping elastic material sheet, make between restraint zone Y1, the Y2 of dorsal part flexible thus.
Even form above-mentioned structure, fit sense and the raising effect with respect to the permissible range of size difference also can be improved.
In addition, design in the scope that the tensile force of rubber covered wire and extensible member can be adopted in known disposable diaper and without a doubt.
On the other hand, surface patch 11 is identical with back sheet 12 shapes in the present embodiment and extend to the lateral margin foreign side of absorber 13, and bonding with back sheet 12 by hot-melt adhesive etc.For surface patch 11, except various non-woven fabrics such as spun-bond process non-woven fabrics, ventilation (air through) non-woven fabrics, SMS non-woven fabrics, spot gluing (point bond) non-woven fabrics, in guaranteeing the scope of liquid permeability, can also use plastic sheetings such as polyethylene film and with plastic sheeting and the coarctate laminated nonwoven fabric of nonwoven layer.And, also can use the netted material that line plain weaves such as nylon, polyethylene terephthalate (flat Woven り) etc. are formed.
Absorber 13 is at the fine パ Le of long-pending fiber paper pulp (Plot プ) or the fiber assembly that forms by fibre bundle (tow) in the inherence have and wrap paper pulp sheet etc. on the absorbable polymer and form.As the fiber that constitutes described fiber assembly (the following fibre bundle that only is called constitutes fiber), for example be polysaccharide or its derivant (cellulose, cellulose esters, chitin, chitosan etc.), synthetic high polymer (polyethylene, polypropylene, polyamide, polyester, poly-lactamide (polylactamide), polyvinyl acetate etc.), especially, be preferably cellulose esters and cellulose.
As described superabsorbent polymer, material after being suitable for using the water-swellable polymer such as hydrolyzate, polyoxyethylene cross-linking agent, carboxymethyl cellulose crosslinked thing, poly(ethylene oxide), polyacrylamide of carboxymethyl cellulose, polyacrylic acid and its esters, acrylate polymer cross-linking agent, starch-acrylate graft copolymer, starch-acrylonitrile graft copolymer partial cross-linked, perhaps copolymer of isobutene. and maleic acid etc.Caking capacity for the moisture absorption that suppresses by product causes also can use the material that has added anti-blocking agent.In addition, as superabsorbent polymer, have the polymer of various forms such as powder shaped, particle shape, graininess, ball shape, colloidal sol shape, suspension, gel, film like, non-woven fabrics shape, these all can use in the present invention, and preferred especially use is emboliform.
In addition, absorbent commodity of the present invention is not limited to this form.For example, also can form the form that is equipped with the elastic telescopic parts such as rubber covered wire that in disposable diaper etc., use throughout.Also can form between surface patch and absorber for purposes such as diffusion of body fluids and the form of supplementary plate (second sheet) is set.
＜the second embodiment 〉
In the first embodiment, be that the hair side material piece is sticked on the back sheet form as the junction surface X1 of restraint zone Y1, Y2, but, in this second embodiment, be not that the hair side material piece is sticked on the back sheet, but wait and form hair side material portion by the part of the outer surface of back sheet 12 itself being implemented suitable embossing processing, and with it as junction surface X1, be the form of so-called driftlessness band.Fig. 4 illustrates the disposable diaper Z2 of this second embodiment.Below, be that the center describes second mode with the point different with first embodiment.
The back sheet 12 of first mode not necessarily must dispose outer dress and use non-woven fabric plate 12B, and still, in second mode, face side disposes the non-woven fabric plate 12B or the sheet of weaving cotton cloth usually outside in order to improve skin sense of touch and formation junction surface.
For the bonding way of non-woven fabric plate 12B and opaque liquid diaphragm 12A, by the crimping of carrying out via hot-melt adhesive such as embossing processing.
The preferred basic weight of this non-woven fabric plate 12B (level ground amount) is 10～100g/m 2, 20～60g/m more preferably 2If the basic weight of non-woven fabric plate is less than 10g/m 2, (Network む) space that interweaves that then can't keep the hook flooring fully, and non-woven fabrics sector-meeting breakage when restraint zone is peeled off are if surpass 100g/m 2, significantly therefore the position beyond then productivity ratio variation of non-woven fabric plate, and restraint zone and the junction surface fastening become is not preferred.
On the other hand, in the back sheet 12 of the manner, in the scope that comprises the scope that forms junction surface X1, dress is with being equipped with middle non-woven fabric plate 12C between non-woven fabric plate 12B and the opaque liquid diaphragm 12A outside.By non-woven fabric plate 12C in the middle of clamping, it is big that thereby the volume at this position becomes, being pressed into when being crimped on restraint zone Y1, Y2 on the X1 of junction surface feels excellent, and, improved interlaminar strength, can prevent to be accompanied by restraint zone Y1, Y2 joint, peel off and the splitting of the outer dress non-woven fabric plate 12B that causes.
Herein, the opaque liquid diaphragm 12A of the portion that clamps of non-woven fabric plate 12C and the peel strength of non-woven fabric plate 12B were 175～195g/25mm in the middle of expectation was positioned at.In addition, this peel strength refers to, and the back sheet 12 under 25 ℃, the condition of 65%RH is taken a sample 180 ° of peel strengths the when speed of dividing with 300mm/ from an end is peeled off with width 25mm, length 100mm at the width (laterally) of blank.
If formation junction surface X1 adopt embossing processing, the method for then giving embossing adopts known method.For example, after making back sheet 12, the mode that becomes protruding knurling rolls side with the non-woven fabric plate side supplies to embossing device and implements to get final product, described embossing device has protruding knurling rolls and the rubber rollers of facing mutually with it, described protruding knurling rolls are formed with the embossing convex pattern in the precalculated position, described rubber rollers has the flexibility of the degree that the protuberance for protruding knurling rolls is pressed into.
In addition, also can use and have the embossing device that is formed with the recessed knurling rolls of the protuberance corresponding concave part of protruding knurling rolls.
In addition, same with first mode, the junction surface X1 of the manner also has five different zones of peel strength.The difference that makes each regional peel strength is according to the difference of embossing density and difference.Also can make its difference also different according to the embossing degree of depth.
In addition, specifically form the embossing degree of depth of which kind of degree, basic weight that embossing density depends on non-woven fabric plate and the structure of hook flooring.Can suitably design.Herein, the pattern for the embossing of giving as the junction surface can adopt the known pattern that carries out on the junction surface of this driftlessness belt, still, is preferably the pattern that MD direction when back sheet forms or CD direction are arranged with embossing.In this pattern, be generally the pattern that disposes along the embossing of the length direction of product or width, thereby, owing to the joint of restraint zone, to peel off the fluffing that causes less.
Especially, though diagram not, when embossing when the product length direction disposes, excellence aspect the retractility of abdominal circumference and aeration.Herein, in the present invention, what is called is provided with along the product length direction, is not limited to form by the embossing of linearity, and the jagged embossing long in product length direction side also is along the product length direction.And, though diagram not serves as that the oval-shaped embossed pattern of growing the limit also is along the product length direction with the product length direction.As long as the length direction of embossing is along the product length direction.
＜the three embodiment 〉
Fig. 5 illustrates the disposable diaper Z3 of the 3rd embodiment.The junction surface X1 of the disposable diaper Z3 of Third Way is formed by the set of a plurality of connector element x, x....These connector element x, x... form by the hair side material piece panelization with the face button.And then, the junction surface is formed by five zones that vary in size of these connector element x, x..., use maximum connector element in the region D 1 that is arranged in central authorities, peel strength is the highest, the size of employed connector element is according to the region D 2 of region D 1 adjacency, further the order with the region D 3 of region D 2 adjacency diminishes, thereby constitutes peel strength and reduce towards both sides of the edge.In addition, also can constitute, the size of connector element x, x... is identical in each zone, and its configuration density is different to make the peel strength with between the hook flooring in each zone different by making.Other structure is identical with first embodiment.
＜the four embodiment 〉
Secondly, the disposable diaper to the 4th embodiment describes.The hair side material piece that the disposable diaper Z4 of the 4th embodiment is to use the face of the feature with easy adjustment engaging force to buckle constitutes the mode of the hair side material piece of using as the junction surface in first embodiment.
In addition, the hair side material piece of the face button of this feature also can be applied to disposable products such as the absorbent commodity, operating coat, packaging material beyond the disposable diaper of the manner, is not limited to be applied in the disposable diaper.
Structure except the junction surface of this feature all is the structure identical with first embodiment.Therefore, below, relate generally to the hair side material piece different and describe with first embodiment.
As shown in Figure 6 and Figure 7, the hair side material piece X2 of the face button of the manner constitutes: be formed with on the hair linear element 20a formation face of hair side substrate sheets 20 that a large amount of fibers is ring-type, arciform hair linear element 20a, 20a..., stacked have the porose covering piece 21 of a plurality of hole 21a of portion, 21a and utilize bonding agent 22 to carry out bonding, and a part that a plurality of maos of linear element 20a, 20a form faces is exposed to the outside from the 21a of hole portion of porose covering piece 21.
In this hair side material piece, be located at the configuration mode of the 21a of hole portion on the porose covering piece and adjust the area that exposes of hair linear element by suitable design, can adjust the local or whole engaging force at junction surface extremely simply with respect to the hook flooring.That is,, then can easily reach adjustment to the engaging force of the integral body at junction surface if form the porose covering piece of uniform hole portion configuration mode.If form the porose covering piece of uneven hole portion configuration mode, then can easily reach adjustment to the partial engaging force at junction surface.
For example, by setting the different multiple hole portion of area in each zone or making the configuration density difference of each regional hole portion, can form the local different junction surface of engaging force simply.Like this, carry out embossing processing etc. and the situation of its conquassation is compared, exist the junction surface to be difficult for the advantage of hardening with the hair linear element fusing that makes the hair side substrate sheets for engaging force being carried out local the adjustment or to it.
Herein, described hair side substrate sheets 20 is to have to be suitable for the hair linear element 20a that engages with corresponding hook plane materiel tablet, the sheet of 20a in a large number, can directly use known in the prior embodiment various hair side material piece itself.For example can use: on a face, be formed with weaving cotton cloth of a large amount of ring-types or arciform hair linear element; With the non-woven fabrics that on single face, has formed ring-type, arciform hair linear element by the net that is formed by olefines such as polyethylene or polypropylene, polyesters, natural fibers such as regenerated fibers such as synthetic fibers, staple fibre or CUP, cotton such as polyamide-based etc. being implemented suitable processing method such as water acupuncture manipulation, spun-bond process, hot rolling method, meltblown, needle point method, thermal contraction method.Consider that from the aspect that can make cheaply non-woven fabrics is more preferably.
In addition, to the non-woven fabrics topographic feature circlewise or in the processing method of arciform hair linear element, the water acupuncture manipulation be imbued with flexibility, drapability aspect excellence, the hot rolling method volume big and softish aspect excellence, can suitably select according to application target.Herein, non-woven fabrics also can be stacked non-woven fabrics, for example can use as raw material and will utilize spun-bond process shape spun-bonded non-woven fabrics into the net (S) layer and utilize the suitably stacked non-woven fabric laminate that forms more than two-layer of meltblown shape melt-blown nonwoven layer of cloth into the net (M).
When design hair side substrate sheets 20,, suitably select to get final product according to purposes for which kind of degree is the peel strength between hair side substrate sheets 20 and the hook flooring corresponding with it be designed to.Certainly, do not coat the yet insufficient scope of porose covering piece 21 engaging forces even can not be.And, the porose covering piece 21 that is arranged in upside when peeling off produce damaged or fiber from the 21a of hole portion, 21a is drawn out and produce the high peel strength of nappy probability and go beyond the limit in the purposes that engages repeatedly, peels off.And, utilize porose covering piece 21 to coat sizable scope in order to suppress the problems referred to above, thereby in fact do not have the peel strength of advantage also to go beyond the limit.For example, space required goes beyond the limit than the situation that is the coating more than 98%.
With regard to concrete numerical value, the expectation peel strength is designed to 100gf～1500gf, is preferably 140gf～400gf.
In addition, the assay method of this peel strength is as described below measures.At first, with the doubling and form the doubling strap of width 25mm * 100mm on width of the strap of width 50mm * length 100mm, hook plane materiel tablet is sticked on securely an end of this strap.At this moment, the hook flooring of hook plane materiel tablet is positioned at than the front end of strap in the outer part position also.
On the other hand, be that top mode utilizes the double-sided adhesive band that hair side substrate sheets of the present invention is sticked on the stainless steel plateform with hair linear element formation face.Further, utilize kraft paper gummed tape that two ends are fixed.
Then, after making the hook flooring and hair linear element formation face contacts, the roller with quality 2kg on them makes a round trip from the strap side, crimping hook plane materiel tablet and hair side substrate sheets.Further, in 10 seconds of counterweight at the other end suspention 1kg of the opposition side that is pasted with hook plane materiel tablet of strap,, the pressure contact portion branch engages reliably thereby being applied shearing force.
Subsequently, utilize the other end of the opposition side that is pasted with hook plane materiel tablet of the anchor clamps clamping stainless steel flat plate of cupping machine and strap.At this moment, making the draw direction of anchor clamps of the other end of the opposition side that is pasted with hook plane materiel tablet of clamping strap is 90 ° with respect to stainless steel flat plate.
After the mode that with final peel angle is 90 ° like this is arranged on anchor clamps on the cupping machine, peel off the crimping part with the speed of 300mm/min, with the concavo-convex weighted mean measured this moment as peel strength.In addition, measured value is 3～10 times a meansigma methods of effective measured value.And, become CD with mensuration the mode of the mensuration of CD direction be provided with surveying periodic sample.In addition, the size of test film is: hook flooring 47mm ± 3mm (MD direction) * 93mm (CD direction), hair side substrate sheets 23.5mm ± 1.5mm (MD direction) * 24mm (CD direction).MD direction herein is the product fore-and-aft direction, and the CD direction is the product width direction.
In addition, in the test of peel strength, use cupping machine (the AUTOGRAPH AGS-G100N that SHIMADZU company makes).
On the other hand, when design hair side substrate sheets 20,, suitably select to get final product according to purposes for which kind of degree is the shearing force between the hook flooring of hair side substrate sheets 20 and correspondence be designed to.Even be not contemplated to be and do not coat the shearing force that porose covering piece 21 also can't engage.And, be not contemplated to be yet and might apply load and make its damaged shearing force in inner peripheral portion of hole portion.On the contrary, thus also not being contemplated to be engagement feel crosses the shearing force that has by force the advantage that does not have the face button of hard sense.
With regard to concrete numerical value, the expectation shearing force is designed to 1kg～10kg, is preferably 3kg～8kg.In addition, the assay method of this shearing force is as described below measures.At first, be that top mode utilizes the double-sided adhesive band that hair side substrate sheets of the present invention is sticked on the stainless steel plateform with hair linear element formation face.Further, utilize kraft paper gummed tape that two ends are fixed.This moment the hair side substrate sheets around the residual blank that stainless steel plateform is arranged.
Then, with after described hair linear element formation face contacts, the roller with quality 2kg on them makes a round trip from the strap side, crimping hook flooring and hair side substrate sheets at the hook flooring that makes restraint zone.
Then, utilize the blank parts of the stainless steel plateform of anchor clamps clamping of cupping machine and an end of restraint zone (fastening tape).Clamping this moment spacing is 50mm.After finishing clamping like this,, measure maximum shear stress with the speed of draw speed 30mm/min shear direction stretching clamp to hook flooring and hair side substrate sheets.In addition, measured value is 3～10 times a meansigma methods of effective measured value.And, become CD with mensuration the mode of the mensuration of CD direction be provided with surveying periodic sample.In addition, the size of test film is: hook flooring 47mm ± 3mm (MD direction) * 93mm (CD direction), hair side substrate sheets 23.5mm ± 1.5mm (MD direction) * 24mm (CD direction).MD direction herein is the product fore-and-aft direction, and the CD direction is the product width direction.
On the other hand, form the parts that face is adjusted the engaging force of hair side substrate sheets 20, therefore can use the sheet material littler than described hair side substrate sheets 20 with respect to the engaging force of hook flooring thereby porose covering piece 21 is the hair linear elements that coat hair side substrate sheets 20.
But porose covering piece 21 is not limited to the parts that do not engage with the hook flooring, for example, also can use the parts with hair linear element that can the engage hook flooring.Also can use the sheet material stronger than hair side substrate sheets with respect to the engaging force of hook flooring.The variation of the design of the partial engaging force/peel strength between that like this, enlarged the junction surface and the hook flooring.
The material of porose covering piece 21 is not particularly limited, and for example can use various resinousness diaphragms, non-woven fabric plate, the sheet of weaving cotton cloth, flexible material sheet and other various known sheet materials such as polyethylene film sheet.If use porose covering piece, then select the sheet material different to get final product with the hair side substrate sheets with mao linear element.
As porose covering piece, if use non-woven fabric plate, can improve the fiber weight per unit area to improve fibre density or to reduce the annulus of fiber surface, the quantity and the ring height of pars arcuata, form the non-woven fabric plate littler than hair side substrate sheets 20 thus with respect to the engaging force of hook flooring by adjusting based on the processing situation of the whole bag of tricks such as water acupuncture manipulation.
As porose covering piece 21, non-woven fabric plate is suitable if attach most importance to then with the skin tactility, and the high resin-made membrane sheet of flatness on surface is suitable if attach most importance to then with the inhibition engaging force.
Be located at a plurality of hole 21a of portion, 21a on the porose covering piece 21 and be the hair linear element 20a, the 20a that are used to make hair side substrate sheets 20 expose to the outside expose hole 21a, 21a, the hook flooring is bonded on the hair side substrate sheets 20 via the 21a of this hole portion, 21a.
Therefore, consider that the junction surface is configured in the position on the diaper, suitably design the open area area, quantity, position of the 21a of hole portion, 21a etc.,, perhaps make engaging force at interim ground, each suitable position or different continuously to be adjusted to suitable engaging force.
In addition, because the effect of the engaging force that is difficult to be inhibited when the open area of a 21a of hole portion is bigger than the actual engagement face of hook flooring, so the open area of a hole portion is set to littler than the actual engagement face of the hook flooring of restraint zone.
As the shape of the 21a of hole portion, except circular port shown in Figure 6, also can be as Fig. 8 and shown in Figure 9, form along the slot portion of the slit-shaped of the width of sheet or the preset width that vertically is provided with.The shape of hole portion is not particularly limited, and also can be unshowned delthyrium in the illustrated example, and, do not need to make the shape of a plurality of hole portion all identical yet.
In addition, in illustrated example, for the structure of hair side material piece is described, for the purpose of convenient, be equipped with identical shaped, the hole portion of identical size, slit pore with having systematicness, but, if for example from width central authorities make to both sides engaging force on each regional stage ground or seriality ground change, then can from width central authorities towards lateral side dispose the different circular port of aperture area successively or make same area circular port the configuration density difference or suitably design interval, the slit separation of slit width.
On the other hand, for the 21a of hole portion, 21a, if consider to be used for the junction surface, then can with total open area (with the open area of porose portion add together the gross area) adjust in 30%～80% scope with respect to the gross area of hair side material piece X2, and, in this case if hole shape is circular mode, then can every 80cm 2200 left and right sides diameters are set Hole portion, if the slit of width 1mm～5mm then can be configured with about 2～5 times spacing of slit width.If this degree then can suppress engaging force fully, can show suitable intensity simultaneously.
The configuration mode of design hole portion is comparatively suitable in making the scope that reduces by 10%～15% degree with respect to the peel strength of hair side substrate sheets 20.In addition, the present invention might not be limited to this numerical range, can suitably change according to purposes.
Bonding for hair side substrate sheets 20 and porose covering piece 21 can be selected to use from known bonding agent 22 according to the material of each sheet.The not high bonding agent of bonding after-hardening is suitable.Because the present invention does not wish the inflexible raising that the fusion by the hair side base material that is accompanied by heating causes, therefore thermal welding is not used in expectation.Even in thermal welding, if the area of a point is 5mm 2Below, the embossing rate is the some embossing below 10%, perhaps line width is the above wire embossing of 3mm away from each other of following, the adjacent line of 1mm, then rigidity also improves hardly, therefore also can use.Preferably utilize the hot-melt adhesive that uses in bonding between sheet materials such as non-woven fabrics to carry out bonding.Hot melt adhesion portion can not make the adhesive portion sclerosis just can carry out bonding to sheet material substantially.Wherein, the preferred especially hot-melt adhesive of the flexibility of having considered not damage the non-woven fabrics that is used for absorbent commodity, hygienic article that uses carries out bonding.
, two sheet materials 20,21 are being carried out when bonding, bonding agent can be coated on hair side substrate sheets side, also can be coated on porose covering piece side herein.Be coated on a suitable side as required and stackedly carry out bonding getting final product.With the configuration pattern of keeping away aperture portion bonding agent is coated on the hair side substrate sheets and compares, be coated on the porose covering piece 21 and make easily.
As the coating method of bonding agent, can on whole of the either party in hair side substrate sheets 20, the porose covering piece 21, be coated with, also can be wire or point-like is coated with partly.And, also can use tub coating flush coaters such as (slot coater) directly to be coated on the sheet material, also can use the method for scattering the hot melt powder or be coated with by using nozzle to scatter.Coating method is not particularly limited.
On the other hand, in hair side material piece X2 of the present invention, can constitute and make the parts of described porose covering piece 21 for having retractility, stretching by this makes each hole portion enlarge, dwindle.For example, can enumerate the (Network body that interweaves that has utilized between the fiber and close い) flexible nonwoven fabrics or have weaving cotton cloth of retractility by inweaving.When hole portion enlarges owing to stretching, when dwindling, can obtain following form: hole portion is enlarged engage, dwindling of logical via portion reduced exposing of unwanted hair linear element behind joint.
On the other hand, in hair side material piece X2 of the present invention, can by between hair side substrate sheets 20 and porose covering piece 21, dispose rubber covered wire, elastic material sheet, urethane film, other elastic flexible materials such as elastic telescopic sheet (not shown) are given retractility.And then, when giving retractility by extensible member like this, the 21a of hole portion, 21a are hidden between the fold that produces when hair side material piece X2 shrinks, the hole 21a of portion, 21a expose clearly when hair side material piece X2 is stretched, therefore can obtain following form: make the 21a of hole portion, engaging with the hook flooring when 21a exposes, the extended configuration of removing hair side material piece X2 subsequently makes the joint unwanted hole 21a of portion, 21a be hidden between the fold once more, thereby can by mistake not engage.
In addition, bonding between elastic telescopic parts and each sheet, though can suitably select, and bonding same between above-mentioned hair side substrate sheets and the porose covering piece, hot-melt adhesive preferably used.
＜the five embodiment 〉
Though diagram as the 5th embodiment of the present invention, can not enumerated overleaf and on the sheet hair side material portion is set, and further disposes the mode of porose covering piece in the mode that coats this hair side material portion.This mode is a following manner, that is, in the junction surface of second embodiment, for the engaging force of the integral body at junction surface being adjusted or reached the difference of the partial engaging force at junction surface, adopted at the porose covering piece described in the 4th embodiment.
Because the basic structure of diaper is identical with second embodiment, porose covering piece is identical with the 4th embodiment, therefore omits explanation.
As its specific structure that the manner adopted, for example, owing to coat the scope that comprises hair side material portion of back sheet with porose covering piece, therefore and not only in as the scope at junction surface, form hair side material portion, but in the hair side material portion that is provided with on the whole of more wide scope, for example back sheet, and utilize the part that does not set hole portion of porose covering piece to coat unwanted part, thereby can constitute the structure that in position is provided with the junction surface.In addition, bonding for back sheet and porose covering piece carried out according to the bonding way of hair side substrate sheets described in the 5th embodiment and porose covering piece.Setting etc. of elastic telescopic parts is also identical.
＜the six embodiment 〉
Secondly, the 6th embodiment is described.In the junction surface, for the purpose that realizes increasing engaging force or as the means of the local difference that forms the peel strength in the junction surface, the perforate that can implement to connect back sheet is handled and a large amount of perforates is set.
In the preset range of setting as the engaging zones of the back sheet at the junction surface that constitutes above-mentioned second embodiment, be provided with the perforate 30 of a large amount of perforations, the example of 30... shown in Figure 11 (A).
Can be clear from figure, when being provided with a large amount of perforates 30,30... on the X1 of junction surface, the hook elements 40 of hook flooring, 40... engage with this perforate, thereby can improve engaging force.Especially, even non-woven fabrics of the low no volume of weight per unit area etc. also can be given sufficient engaging force.In addition, can by the formation ratio of perforate adjust and restraint zone between engaging force.
Flat shape as the perforate under this situation 30,30..., can form in long on the diaper length direction or the wire perforate of long slit-shaped on the diaper width, perhaps form the hole shape that circle, ellipse or crescent etc. have fillet.And, its arrangement can be the rule also can be irregular, can spread all over the junction surface and arrange arbitrarily.But,, should consider that then the peel strength of this each several part is suitably set hole shape and set density etc. if conduct forms the means of the difference of the partial peel strength in the junction surface.
In addition, for the cross sectional shape of perforate, can be that the edge of this perforate is smooth shape with respect to the surface of diaper, also can shown in Figure 11 (B), form the shape that erects to the diaper outside.Because the outside face side of verge of opening 30e, 30e... erects a little, thereby colludes the hook flooring easily, is easy to generate engaging force.
In addition, from guarantee and the hook flooring between appropriateness engaging force or keep the viewpoints such as intensity of non-woven fabrics, the percent opening of expecting described perforate forms 30%～80% the area ratio at described junction surface.Thereby the hook elements that enters perforate when percent opening is lower than 30% reduces and can't obtain sufficient engaging force, thus when percent opening surpasses 80% the disruptive probability height of weakened of non-woven fabrics self.
And, if described perforate forms slit-shaped, expect that then slit width is 0.2mm～5mm, be preferably 0.5mm～2mm, the Center Gap of expectation slit is 1mm～15mm, is preferably 5mm～10mm.If form circular hole etc., expect that then a diameter of a circle (maximum gauge) is 0.5mm～10mm, be preferably 1.0mm～5mm, the Center Gap in expectation hole is 5mm～15mm, is preferably 7mm～10mm.In addition, under the situation of elliptical shape beyond the formation circle or crescent shape, expect a size that is shaped as in the size that is accommodated in 5mm * 5mm.
In addition, the technology that the related perforate of the manner is set is not limited to as the engaging zones of back sheet and the preset range of setting, also can hair side material piece, hair side substrate sheets, the porose covering piece of hair linear element be carried out, in above-mentioned first～the 5th embodiment, also can adopt.Therefore, for except the structure the structure that perforate is set on the junction surface, for example structure of the position at surface patch, absorber, junction surface, scope, size, restraint zone etc. can both suitably be set according to first～the 5th embodiment.
＜other embodiment 〉
Above-mentioned each mode all is that peel strength is from the mode of product width direction central part towards edge, left and right sides step-down, but in contrast, in the present invention, also the junction surface can be formed the mode that peel strength uprises towards edge, the left and right sides from product width direction central part.
And in the present invention, the junction surface also can form peel strength and uprise towards the opposite side edge or the mode of step-down from the vertical lateral edges of product.
In addition, in the present invention, also the junction surface can be formed peel strength and uprise towards edge, the left and right sides or step-down and peel strength uprise towards the opposite side edge or the mode of step-down from the vertical lateral edges of product from product width direction central part.
In these modes,, get final product according to the suitable design alteration of the explanation of above-mentioned each mode for formation and the local different junction surface of the engaging force between the hook flooring.
Utilizability on the industry
Above the present invention can also be for disposable products such as the operating coat that has used the face buckle mechanism, packaging material except being used for the disposable diaper of use face buckle mechanism.

Claims (20)

1. disposable diaper, described disposable diaper is the disposable diaper of deploying type, has: the surface patch of liquid permeability; The back sheet of opaque liquid; And be installed in absorber between surface patch and the back sheet,
The left and right sides edge part of either party in dorsal part or veutro portion is equipped with the restraint zone of fastening usefulness, part or all of this restraint zone formed by the hook flooring of face button, this hook flooring is bonded on the junction surface between the left and right sides edge part that is equipped on veutro portion or drosal part and dresses, it is characterized in that
Described junction surface constitutes: be provided with in the mode of extending towards edge, the left and right sides from the width center of product, and with described hook flooring between peel strength from the width central part of product towards left and right sides edge direction and/or product vertically on from a lateral edges towards the opposite side edge interim ground or seriality ground different.
2. disposable diaper according to claim 1, wherein,
The hair side material piece of the face button of junction surface by will being formed with a large amount of maos of linear elements is bonded on the back sheet and forms.
3. disposable diaper according to claim 1, wherein,
The part of back sheet itself forms the junction surface.
4. disposable diaper according to claim 2, wherein,
The difference of density by the hair linear element or height makes mao linear element different with peel strength between the hook flooring.
5. disposable diaper according to claim 4, wherein,
Give embossing to the hair side material piece or the back sheet that constitute the junction surface, this embossed pattern is the pattern along MD direction or the arrangement of CD direction.
6. disposable diaper according to claim 2, wherein,
Described junction surface is the hair side material piece of following structure: stacked and bonding porose covering piece with a plurality of hole portion on the hair linear element formation face of the hair side substrate sheets that is formed with a large amount of maos of linear elements forms a face via the hair linear element that exposes from the hole portion of this porose covering piece and engages with the hook flooring.
7. disposable diaper according to claim 6, wherein,
Described porose covering piece is bonded on the hair side substrate sheets by hot-melt adhesive.
8. disposable diaper according to claim 6, wherein,
Porose covering piece has retractility, and bonding with respect to hair side substrate sheets part, flexible by porose covering piece, thus each hole portion constitutes and can enlarge, dwindle.
9. disposable diaper according to claim 6, wherein,
Between porose covering piece and described hair side substrate sheets, be equipped with elastic flexible material.
10. disposable diaper according to claim 6, wherein,
Described porose covering piece is formed with the hair linear element that engages with the hook flooring in a large number in diaper outer surface side.
11. disposable diaper according to claim 10, wherein,
Have the described hair side material piece of mao linear element, described hair side substrate sheets, described porose covering piece and as the engaging zones of back sheet and be provided with a large amount of perforates of perforation at least one of the preset range of setting.
12. disposable diaper according to claim 11, wherein,
Handle the described perforate of formation by implementing perforate towards the one side side that becomes diaper outer surface side, and verge of opening erects to the diaper outside from the one side side that becomes the diaper inner surface side.
13. disposable diaper according to claim 3, wherein,
Give embossing to the back sheet that constitutes the junction surface, this embossed pattern is the pattern along MD direction or the arrangement of CD direction.
14. disposable diaper according to claim 3, wherein,
Described junction surface is the part of following formation: utilize the porose covering piece with a plurality of hole portion to coat the hair side material portion that comprises by the fibroplastic a large amount of maos of linear elements of back sheet self, form a face via the hair linear element that exposes from this hole portion and engage with described hook flooring.
15. disposable diaper according to claim 14, wherein,
Described porose covering piece is bonded on the back sheet by hot-melt adhesive.
16. disposable diaper according to claim 14, wherein,
Porose covering piece has retractility, and bonding with respect to the back sheet part, flexible by porose covering piece, thus each hole portion constitutes and can enlarge, dwindle.
17. disposable diaper according to claim 14, wherein,
Between porose covering piece and back sheet, be equipped with elastic flexible material.
18. disposable diaper according to claim 14, wherein,
Described porose covering piece is formed with the hair linear element that engages with the hook flooring in a large number in diaper outer surface side.
19. disposable diaper according to claim 18, wherein,
At described porose covering piece and as the engaging zones of back sheet and be provided with a large amount of perforates of perforation at least one of the preset range of setting with mao linear element.
20. disposable diaper according to claim 19, wherein,
Handle the described perforate of formation by implementing perforate towards the one side side that becomes diaper outer surface side, and verge of opening erects to the diaper outside from the one side side that becomes the diaper inner surface side.
CN2007800108137A 2006-03-31 2007-03-30 Disposable diaper Active CN101410034B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2006101165A JP4417921B2 (en) 2006-03-31 2006-03-31 Disposable diapers
JP101163/2006 2006-03-31
JP2006101163A JP4417920B2 (en) 2006-03-31 2006-03-31 Female material sheet of hook-and-loop fastener and absorbent article using the same
JP101165/2006 2006-03-31
PCT/JP2007/057280 WO2007114387A1 (en) 2006-03-31 2007-03-30 Disposable diaper

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JP5280710B2 (en) * 2008-03-06 2013-09-04 ユニ・チャーム株式会社 Female member of surface fastener, surface fastener using this female member, and absorbent article using this surface fastener
JP5692958B2 (en) * 2008-05-29 2015-04-01 帝人株式会社 Loop fasteners and textile products
US8123733B2 (en) * 2009-01-29 2012-02-28 First Quality Baby Products, Llc Absorbent article with intermittent side seams
JP5150588B2 (en) * 2009-09-09 2013-02-20 ユニ・チャーム株式会社 Absorbent article using hook-and-loop fastener
CN101914838A (en) * 2010-06-28 2010-12-15 北京大源非织造有限公司 Novel nonwoven fabric
JP2013123449A (en) * 2011-12-13 2013-06-24 Oji Nepia Co Ltd Disposable diaper
JP5838240B2 (en) * 2014-05-27 2016-01-06 ユニ・チャーム株式会社 Disposable diapers
JP6480717B2 (en) * 2014-12-01 2019-03-13 花王株式会社 Deployable wearing articles
GB2554228B (en) * 2015-03-16 2021-08-04 Procter & Gamble Absorbent articles with improved strength
JP6774738B2 (en) * 2015-04-15 2020-10-28 スリーエム イノベイティブ プロパティズ カンパニー Hook-and-loop female material, hook-and-loop fastener, and absorbent articles
JP6906915B2 (en) * 2015-09-29 2021-07-21 日東電工株式会社 Layered article
JP6492033B2 (en) * 2016-06-30 2019-03-27 ユニ・チャーム株式会社 Disposable diapers
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