CN104837450A

CN104837450A - Disposable diaper

Info

Publication number: CN104837450A
Application number: CN201380061918.0A
Authority: CN
Inventors: 山中康弘; 坂口智
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2012-11-27
Filing date: 2013-11-27
Publication date: 2015-08-12
Anticipated expiration: 2033-11-27
Also published as: SA515360490B1; TW201446222A; JP5291236B1; WO2014084239A1; CN104837450B; JP2014104144A; TWI602551B

Abstract

A disposable diaper (10) is provided with an absorbent, a back sheet disposed further toward a non-skin-contacting side than the absorbent, an exterior sheet disposed on the non-skin-contacting side from the back sheet, and an indicator (65) disposed on a skin contacting side from the back sheet. A first region (R1) where the indicator is visible from the non-skin-contacting side of the exterior sheet, and a second region (R2) having higher visibility of the indicator than the first region (R1) are provided to the exterior sheet. At least a portion of the first region and at least a portion of the second region are disposed overlapping the indicator.

Description

Disposable diaper

Technical field

The present invention relates to a kind of disposable diaper.

Background technology

In the past, be known to a kind of disposable diaper, it has front waist area, rear waist area and the lower crotch region between front waist area and rear waist area, and be formed with pair of leg and enclose peristome, and have and cross over lower crotch region and the absorber extended towards front waist area and rear waist area.

Patent Document 1 discloses a kind of technology: in this disposable diaper, in order to make to wear the replacing construction that auxiliary knows disposable diaper, being located at lower crotch region using once touching the hydrophilic medicament that moisture visually changes as instruction unit.The disposable diaper of patent documentation 1 has the translucentization region that light penetration is more than 40%, and the component in the inner part of the sheet than translucentization region is provided with instruction unit.

prior art document

patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2005-27884 publication

Summary of the invention

But there is following problem points in above-mentioned disposable diaper.

Above-mentioned disposable diaper is configured with the sheet with translucentization region on the face abutting side than instruction unit by non-skin.Therefore, be configured to clearly demonstrate instruction unit on the lateral surface of disposable diaper, instruction unit is more eye-catching.In addition, instruction unit is not be placed in underwear, but the structure that disposable diaper is exclusive.By making instruction unit more eye-catching, thus clearly represent it is disposable diaper, and emphasize the functional surfaces of disposable diaper.

In recent years, when selecting disposable diaper, being not only the functional surfaces of disposable diaper and requiring that the user of the texture such as flexibility, skin sense of touch as underwear constantly increases.Such user tends to require to have the function of disposable diaper and has the disposable diaper of the flexibility as underwear.Because the instruction unit of disposable diaper is excessively eye-catching, therefore according to the difference of user, feel the functional surfaces excessively emphasizing disposable diaper sometimes, and the evaluation of the texture of disposable diaper entirety is not improved.

Therefore, the present invention makes in view of the above problems, its object is to provide a kind of can play instruction unit function and the disposable diaper of the texture of disposable diaper entirety can be improved.

The purport of the disposable diaper (disposable diaper 10) involved by the disclosure is, this disposable diaper has front waist area, rear waist area and the lower crotch region between described front waist area and described rear waist area, this disposable diaper has from described front waist area towards the product length direction of described rear waist area and the product width direction orthogonal with described product length direction, this disposable diaper comprises: absorber, it crosses over described lower crotch region, and extend at least one in described front waist area and described rear waist area, the back sheet of opaque liquid, it is configured in than the position of described absorber by non-skin abutment face side, outer load, its be configured in than described back sheet by described non-skin abutment face side position and be made up of non-woven fabrics, and instruction unit, it is configured in than the position of described back sheet by skin abutment face side, be configured to visually change once touching moisture, described outer load is provided with and can looks the visuality of the 1st region and the described instruction unit wherein confirming described instruction unit 2nd region higher than the visuality of the described instruction unit described 1st region from the non-skin abutment face sidelong glance of described outer load, described 1st region at least partially with the overlapping with described instruction unit at least partially of described 2nd region.

Accompanying drawing explanation

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

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

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

Fig. 4 is the expansion rearview of the disposable diaper shown in Fig. 1.

Fig. 5 is the figure after the part A shown in Fig. 4 being amplified.

Fig. 6 is the sectional view along the F3-F3 line shown in Fig. 5.

Detailed description of the invention

Then, the embodiment of disposable diaper 10 of the present invention is described with reference to accompanying drawing.In addition, in the record of the following drawings, same or similar Reference numeral is marked to same or similar part.But accompanying drawing is schematic, should notice that ratio of each size etc. is different from practical situation.

Thus, concrete size etc. should judge with reference to following explanation.In addition, size relationship each other, part that ratio is different can also be comprised each other at accompanying drawing.

In addition, in the present embodiment, the disposable diaper 10 enumerating banding pattern is described for example, but the present invention also can be applied to the disposable diaper 10 of pants type.

(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 the sectional view of the disposable diaper along the F1-F1 line shown in Fig. 1.Fig. 3 is the sectional view of the disposable diaper along the F2-F2 line shown in Fig. 1.Fig. 4 is the expansion rearview of the disposable diaper shown in Fig. 1.Expanded view shown in Fig. 1 and Fig. 4 makes the elastic component 81 of leg pars contractilis 75 and leg side rivel 80 carry out extending until the positive dough sheet 50, flank 70 etc. that form disposable diaper is not formed with the figure of the state after the state of fold.

Disposable diaper 10 has front waist area 20, lower crotch region 25 and rear waist area 30.Front waist area 20 is the parts contacted with the frontal cowl of wearer (abdominal section).In addition, rear waist area 30 is the parts contacted with the rear waist portion (back portion) of wearer.Lower crotch region 25 is between front waist area 20 and rear waist area 30.

In addition, disposable diaper 10 is formed with a pair leg opening part 35.Leg opening part 35 is located at the side end in the product width direction of disposable diaper, is disposable diaper is being worn in the part of enclosing configuration under wearer's state with it along the lower limb of wearer.

In addition, in the present embodiment, the past waist area 20 is called product length direction L towards the direction of rear waist area 30, the direction with the L-orthogonal of product length direction is called product width direction W.

Disposable diaper 10 comprises crosses over lower crotch region 25 and the absorber 40 extended towards at least either direction in front waist area 20 and rear waist area 30 from lower crotch region 25.Absorber 40 is made up of absorbent core 40a and core covering 40b.

Absorbent core 40a can be formed with the material identical with disposable diaper in the past, can use the known component such as comminution pulp, high absorption polymer, material suitably forms.Absorbent core 40a is wrapped up by the core covering 40b of lamellar.

Core covering 40b is the sheet covering absorbent core 40a.A part for the side, at least skin face of core covering 40b is made up of the various fabric nonwoven cloth or thin cotton piece with liquid permeability.Such as, grammes per square metre can be used to be about 10g/m ²~ 30g/m ²hot air type fabric nonwoven cloth, spun-bonded non-woven fabrics, SMS (spunbond-melt blown-spunbond) non-woven fabrics or grammes per square metre be about 10g/m ²~ 30g/m ²thin cotton piece.

There is in the face side (skin abutment face side) of absorber 40 the positive dough sheet 50 of liquid permeability.In addition, there is in the rear side (non-skin abutment face side) of absorber 40 the back sheet 60a of opaque liquid.In the position of the back sheet 60a backrest surface side (non-skin abutment face side) than opaque liquid, there is the outer load 60 be made up of non-woven fabrics.In addition, there is the instruction unit 65 be configured to touching moisture and visually changing by the position of skin abutment face side than back sheet.Describe the structure of instruction unit 65 and outer load 60 below in detail.

Side edge part on the product width direction W of absorber 40 has flank 70 respectively.Flank 70 crosses over front waist area 20, lower crotch region 25 and rear waist area 30, and is configured in than absorber 40 by the position outside product width direction.Flank 70 is made up of the non-woven fabrics after multi-disc overlap more than a slice or two panels.In addition, a pair flank 70 has magic tape 90 respectively.

Magic tape 90 is a pair, extends in rear waist area 30 along product width direction W, by being bonded to the non-skin abutment face of front waist area 20, thus is remained on the health of wearer by disposable diaper 10.

Target portion 95 is a pair, is configured at the non-skin abutment face in front waist area, and is configured to carry out set respectively for a pair magic tape 90.

In the present embodiment, front waist area 20, rear waist area 30 and magic tape 90 is utilized to constitute waistline maintaining part.The waistline maintaining part of rear waist area 30 is the scopes extended in the width direction from the region of the snap portions being provided with magic tape 90.The waistline maintaining part of front waist area 20 is the scopes extended in the width direction from the region being provided with target portion 95.

In addition, disposable diaper 10 has the crotch pars contractilis 200 being configured in the region overlapping with the absorber of lower crotch region 25.In addition, the structure of crotch pars contractilis 200 is described after in detail.

Flank 70 has be configured at and lean on the position inside product width direction and a pair leg pars contractilis 75 that can stretch along product length direction L than leg opening part 35.

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

As long as leg pars contractilis 75 is configured to make leg opening part 35 flexible along product length direction, both can be configured along leg opening part 35, the state that also can tilt relative to leg opening part 35 with a part is configured.

In addition, leg pars contractilis 75 utilizes the formation such as telescopic sheet, rubber covered wire.Leg pars contractilis 75 is the parts of shrinking along product length direction in fact, is the concept except the part except being configured with telescopic sheet under the state not playing contractility.

In addition, in the inner side (position by central authorities on the W of product width direction) of a pair leg pars contractilis 75, there is a pair leg side rivel 80 extended along product length direction L.Leg side rivel 80 is located at the medial end on the product width direction of flank 70, is to be configured in than the flexible rivel of leg pars contractilis 75 by the erecting of the position inside product width direction.Leg side rivel 80 is configured in than leg pars contractilis 75 by the position inside product width direction.Leg side rivel 80 can adopt known structure, specifically, also can utilize with flank 70 phase independently sheet material form.

In addition, the waistline pars contractilis 85 that can stretch along product width direction is provided with between a pair magic tape on product width direction.Waistline pars contractilis 85 shrinks along product width direction between magic tape.

In the present embodiment, waistline pars contractilis 85 is made up of telescopic sheet.The component forming waistline pars contractilis 85 is not particularly limited, but preferably uses the thin as far as possible and component that flexural rigidity is lower, contracting amplitude-frequency is less.Form waistline pars contractilis 85 by the material utilizing flexural rigidity lower, thus waistline pars contractilis 85 is easy to bend along health, load need not be applied to the health of wearer and waistline pars contractilis 85 just can be made along body fit.In addition, waistline pars contractilis 85 is formed by utilizing the material that contracting amplitude-frequency is less, thus the contraction on the product length direction of disposable diaper when disposable diaper can be suppressed to extend along product width direction, disposable diaper can be suppressed by under in-leg layback at the waistline place of wearer.

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

Waistline pars contractilis 85, after elongating to 1.2 times ~ 2.5 times of the length under non-elongate state (naturalness), utilizes hot-melt adhesive or heat treated etc. to be adhered to outer load 60.

In the present embodiment, waistline pars contractilis 85 is configured between outer load 60 and back sheet 60a.But in the structure that core covering 40b extends outside product length direction than absorbent core 40a, waistline pars contractilis 85 also can be configured between core covering 40b and back sheet 60a or outer load 60.The position of waistline pars contractilis is not particularly limited.In addition, in the region not being configured with absorber, also can be configured between flank 70 and back sheet 60a or outer load 60.

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

Magic tape 90 is installed on the region corresponding with rear waist area 30 of flank 70.Magic tape 90 comprises the substrate sheets 91 that is linked to flank 70 and is provided with multiple clamping hooked as fastened component (not shown) and is fixed on the hook tabs 92 of substrate sheets 91.Hook tabs 92 is the regions being provided with fastened component, and above-mentioned waistline maintaining part is the region extended along product width direction from hook tabs 92.

Hook tabs 92 is fixed on substrate sheets 91, is specifically engaged in substrate sheets 91.Preferably, the joint between hook tabs 92 and substrate sheets 91 can not make the rigidity of magic tape 90 be elevated to required more than.Specifically, preferably, the hot-melt adhesive be coated with intermittently that hook tabs 92 and substrate sheets 91 utilize point-like, wire or helical form such engages.In addition, hook tabs 92 and substrate sheets 91 also can engage by seal etc.

Substrate sheets 91 is made up of the non-woven fabrics after multi-disc overlap more than a slice or two panels.As substrate sheets 91, the non-woven fabrics utilizing the method for making such as spunbond (SB) or spunbond-melt blown-spunbond (SMS) to manufacture can be used.The weight per unit area (being summation unit area weight when multi-disc) forming the non-woven fabrics of substrate sheets 91 is 30g/m ²~ 120g/m ², be preferably 40g/m ²~ 90g/m ².

(2) structure of crotch pars contractilis

Then, the shape of crotch pars contractilis 200 is described.

Crotch pars contractilis 200 is configured to compared with other parts of absorber 40, can maintain smooth shape when disposable diaper being worn on wearer in a part for lower crotch region.

At this, crotch pars contractilis 200 both can be can stretch along product length direction L, also can be can stretch along product width direction W, can also be can stretch along product length direction L and product width direction this both direction of W.

Such as, crotch pars contractilis 200 and leg pars contractilis 75 are arranged separately independently, in the position overlapping with absorbent core 40a (in the present embodiment, for wrapping up the position between the core covering 40b of absorbent core 40a and back sheet 60a), be configured to the length (naturalness) on the product width direction W of the absorbent core 40a making this position more than 60% shrinks.

Like this, be configured with the portion retracts of absorbent core 40a by utilizing crotch pars contractilis 200 to make, thus absorbent core 40a shrinking, compared with the non-shrinking part of absorbent core 40a, being easy to maintain smooth shape.

On the other hand, be configured to be positioned at and do not utilize crotch pars contractilis 200 to shrink than crotch pars contractilis 200 by the front waist area 20 of position outside the L of product length direction, the absorbent core 40a of rear waist area 30.

Thus, under the state utilizing magic tape to be held in the waist of wearer, waistline, the crotch pars contractilis 200 being maintained smooth shape at the lower crotch region 25 of disposable diaper 10 can not excessively cling to the body, as a result, crotch pars contractilis 200 is moderately configured along health.

In addition, when crotch pars contractilis 200 can stretch along product length direction L, front waist area 20 and rear waist area 30 are easy to erect because of the contraction of crotch pars contractilis 200, when wearing, can form smooth lower crotch region at the lower crotch of wearer along health.

Its result, because front waist area 20 and rear waist area 30 erect from crotch pars contractilis 200, therefore the conformability of disposable diaper 10 couples of wearers improves.

That is, by the contraction of crotch pars contractilis 200, the mode that can be configured at the lower crotch of wearer with the lower crotch region 25 of disposable diaper 10 stably dresses disposable diaper 10.

In addition, as mentioned above, crotch pars contractilis 200 is configured to stretch, and therefore a part for the lower crotch region 25 of disposable diaper 10 is shunk and forms irregular fold on the surface of the side of wearing the clothes (non-skin abutment face side) of disposable diaper 10.Its result, can make to wear auxiliary by vision and sense of touch and remember clearly have crotch in the disposable diaper 10 of present embodiment.

In addition, crotch pars contractilis 200 also can utilize telescopic sheet to form.By utilizing telescopic sheet to form crotch pars contractilis 200, thus the absorbent core 40a being configured with the region of telescopic sheet shrinks the samely, maintains smooth shape and becomes easier.In addition, telescopic sheet such as can utilize the telescopic sheet identical with leg pars contractilis 75 to form.

Such as, as this telescopic sheet, the such thermoplastic elastomer resin melting of polyurethane, styrene can be used and be formed as membranaceous retractility thin film, the flexible nonwoven fabrics be made up of contractile fibre, the composite sheet etc. of the non-elongate sheet that bonding local is cut-off or brittle on retractility thin film, flexible nonwoven fabrics.

In addition, replace this telescopic sheet, the telescopic elastic component of the wire band shape that also can be made up of polyurethane elastomeric fiber, natural rubber mutual arranged in parallel forms crotch pars contractilis 200.

In this case, the rigidity of the rigidity considering absorbent core 40a and other components forming disposable diaper 10, the thickness can suitably selecting used elastic component, the spacing be configured, but preferably, when disposable diaper 10 main body being set to naturalness (non-elongate state), the whole region of side edge part on the product width direction W of absorbent core 40a has become contracted state.

In addition, make absorbent core 40a the same to utilize crotch pars contractilis 200 shrink, preferably elastic component interval is each other set to below 7mm, is more preferably set to below 5mm.In addition, in order to make absorbent core 40a the same shrink, it is desirable that, the difference at the interval of adjacent elastic component is set to below 2mm.

In addition, specifically, preferably, the expansion and contraction of crotch pars contractilis 200 is 1.1 times ~ 1.5 times.Such as, in the present embodiment, the expansion and contraction of crotch pars contractilis 200 is set to 1.25 times.

Expansion and contraction refers to the flexible degree of the crotch pars contractilis 200 on shrinkage direction (in the present embodiment, being product length direction L), limits as following.

Expansion and contraction=(length on the shrinkage direction of the crotch pars contractilis 200 under maximum elongation state)/(length on the shrinkage direction of the crotch pars contractilis 200 under naturalness)

In addition, in this manual, this expansion and contraction is such as the expansion and contraction measured as follows.

The first, when disposable diaper 10 is enclosed packaging body etc., from packaging body, take out disposable diaper 10.With this state 20 DEG C ± 2 DEG C, place 60 minutes under the atmosphere of relative humidity 60% ± 5%RH, measure the length of crotch pars contractilis 200 along shrinkage direction.Using this length as " length of the crotch pars contractilis 200 under naturalness ".

Second, measure the length on the shrinkage direction of the desired region under this state (that is, naturalness) and make disposable diaper extend to the length the shrinkage direction of desired region when visually cannot confirm the state of the fold caused by elastic component from naturalness.Using this length as " length of the crotch pars contractilis 200 under elongation state ".

Use these measurement results, carry out calculating by utilizing above-mentioned formula and measure percentage elongation.

In addition, the measurement of " length " in this description utilizes following measuring method to carry out.

When disposable diaper 10 is enclosed packaging body etc., use to take out from packaging body and with this state 20 DEG C ± 2 DEG C, placed 12 hours under the atmosphere of relative humidity 60% ± 5%RH after sample.

Then, use the spring wind tape (spring measure) (band: reinforced PVC) of affine mensuration Co., Ltd. of Japan, along measuring object position, measure the length of the leg pars contractilis 200 under the naturalness of length, the i.e. disposable diaper 10 under this state of disposable diaper 10.In addition, the length under elongation state measures to make disposable diaper 10 extend to the length of the leg pars contractilis 200 when visually cannot confirm the state of the fold caused by elastic component from naturalness.

At this, for 10 samples, under respective state, carry out above-mentioned measurement, using its meansigma methods as length.According to the length so measured, area can be calculated.

Like this, by the expansion and contraction of crotch pars contractilis 200 is set to 1.1 times ~ 1.5 times, the flexible of the skin of wearer suitably can be followed.

Such as, if wearer rolls up such anteflexion posture on front side of health, then at the skin place of the buttocks side of wearer, exist relative to the position of about 30% that made the state after body line up extend.

Namely, if the expansion and contraction of crotch pars contractilis 200 is set to and is less than 1.1 times, the contraction of the crotch pars contractilis 200 then under naturalness is insufficient, compared with not being provided with the situation of crotch pars contractilis 200, the contraction of the absorber configuring area in the lower crotch region 25 of disposable diaper 10 is less, the lower crotch region 25 of disposable diaper 10 becomes insufficient at the lower crotch of wearer with the situation obtaining smooth shape along the mode of health, and disposable diaper 10 is easy to offset from the health of wearer.

On the other hand, if make the expansion and contraction of crotch pars contractilis 200 be greater than 1.5 times, contraction on the shrinkage direction of then crotch pars contractilis 200 is oversize, therefore the region existing for crotch pars contractilis 200 is easy to become the state than being more close to along health, and disposable diaper 10 is easy to offset to the below of wearer.

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

In addition, amount of contraction fully diminishes with fold and length " b (mm) " under the state of extending close to level and smooth mode of the surface of sample and the difference along the length " a (mm) " under the naturalness on the direction of the shrinkage direction of sample, and (b-a) can be utilized to calculate.

The present inventor can confirm: if the amount of contraction on the product length direction L of crotch pars contractilis 200 is set to 2% ~ 8% of the length on the product length direction L of disposable diaper 10, then be worn in wearer's process with it by disposable diaper 10, crotch pars contractilis 200 is easy to the health along wearer ideally.

At this, if make the amount of contraction on the product length direction L of crotch pars contractilis 200 be greater than 8%, then crotch pars contractilis 200 excess shrinkage, curtailment on the product length direction L of disposable diaper 10, be difficult to make disposable diaper 10 be attached at the health of wearer, or the health of disposable diaper 10 and wearer is excessively close at lower crotch region 25 and is easy to skew.

On the other hand, if make the amount of contraction on the product length direction L of crotch pars contractilis 200 be less than 2%, be then difficult to present the effect itself making disposable diaper 10 press close to the such crotch pars contractilis 200 of the health of wearer.

In addition, the center O2 of the crotch pars contractilis 200 on the L of product length direction is configured in the position of the side, center O1 forward waist area 20 than the disposable diaper 10 on the L of product length direction.In addition, crotch pars contractilis 200 is configured to the center O1 of the disposable diaper 10 crossed on the L of product length direction.

In addition, crotch pars contractilis 200 is formed in the position of the center O1 of the disposable diaper 10 comprised on the L of product length direction.

In addition, the length (naturalness) on the product length direction L of rear waist area 30 is configured to longer than the length (naturalness) on the product length direction L of front waist area 20.

Specifically, preferably, composition of proportions between length (naturalness) on length (naturalness) on the product length direction L of rear waist area 30 and the product length direction L of front waist area 20 is 1.1 ~ 1.6, is more preferably configured to 1.2 ~ 1.5.

If this ratio is more than 1.6, then the balance between the veutro of disposable diaper 10 and dorsal part is broken, make crotch pars contractilis 200 along lower crotch region 25 when, front waist area 20 is excessively close to, or rear waist area 30 cover required more than.

Specifically, the health of wearer generally becomes the state that buttocks is given prominence to more than hypogastric region, therefore on the basis making crotch pars contractilis 200 consistent with the lower crotch of wearer, by aforementioned proportion is set to above-mentioned scope, thus disposable diaper 10 becomes the shape of the body shape of the complexity being more suitable for wearer.

That is, the unwanted gap between the disposable diaper 10 can prevent the local of the disposable diaper 10 caused by the part producing undersize from tightening, being caused by the part that generation size is unnecessary and health.

In addition, particularly when before starting walking or when carrying out the infant used when starting walking, health is preferably taked to become the posture of circle towards veutro, under this posture, the skin of buttocks side is easy to the state becoming stretching, extension, by aforementioned proportion is set to above-mentioned scope, thus become the state being suitable for the health being easy to the infant taking this posture.

Enumerate an example, relative to the product length 400mm (length under the naturalness on the L of product length direction) of disposable diaper 10, front waist area 20 is set to 130mm (length under the naturalness on the L of product length direction), crotch pars contractilis is set to 80mm (length under the naturalness on the L of product length direction), and rear waist area 30 is set to 100mm (length under the naturalness on the L of product length direction).

In this case, the ratio of the length (naturalness) between front waist area 20 and rear waist area 30 is about 1.46.By being set to this ratio, thus crotch pars contractilis 200 can not only be made along the health of wearer, but also the overall health along wearer of the product length direction L of disposable diaper 10 can be made.

That is, according to this structure, the fore-and-aft direction position of crotch pars contractilis 200 is determined, thus disposable diaper 10 is correctly suitable for the health of wearer, can realize the target of the present invention that the design interlock of disposable diaper 10 can be made so more reliably.

State after crotch pars contractilis 200 shrinks is in different forms compared with the non-constricting state in the absorber configuring area than crotch pars contractilis 200 side, forward waist area 20 and side, rear waist area 30, therefore, when disposable diaper 10 is dressed in wearer, be easy to crotch pars contractilis 200 is correspondingly dressed with the lower crotch of wearer.

In addition, according to this configuration, under the state that the position being provided with crotch pars contractilis 200 of absorbent core 40a is shunk, rigidity or the thickness at the rigidity at this position or thickness and the position of other absorbent cores 40a are different, therefore wear auxiliary and are easy to identify the position consistent with the lower crotch of wearer at the lower crotch region 25 of disposable diaper 10.

And, after wearing disposable diaper 10, crotch pars contractilis 200 maintains smooth shape at the lower crotch of wearer, disposable diaper 10 self becomes 3D shape, can make the lower crotch of lower crotch region 25 along wearer of disposable diaper 10, the situation that therefore the lower crotch region 25 of disposable diaper 10 and the lower crotch of wearer as one man carry out dressing becomes more reliable.

As shown in Figure 1, notch part 110 and notch part 120 is formed with at the lower crotch region 25 of absorber 40.Notch part 110 and notch part 120 are the regions not having the absorbent core 40a forming absorber 40.

In the present embodiment, notch part 110 and notch part 120 are equivalent to the low rigid portion of weight per unit area lower than the weight per unit area of other parts of absorbent core 40a of absorbent core 40a.

In addition, replace and form notch part 110 and notch part 120, the weight per unit area of absorbent core 40a also can be made lower than the weight per unit area of other parts of absorbent core 40a.

As shown in Figure 1, notch part 110 and notch part 120 are formed along the edge part on the product length direction L of crotch pars contractilis 200.

In addition, preferably, even if when being formed with notch part 110 and notch part 120, the absorbent core 40a being positioned at front waist area 20 and rear the waist area 30 and absorbent core 40a being positioned at lower crotch region 25 also can not cut off but continuous print completely, particularly preferably is continuous on the W of product width direction.

Notch part 110 and notch part 120 go along with the outside to product width direction W and make the length (naturalness) on the L of product length direction elongated.

According to this shape, the outside of the product width direction W of absorbent core 40a is easy to shrink more, is therefore easilier formed on disposable diaper 10 smooth " bottom ".

And, be positioned at and erect from smooth " bottom " than the absorbent core 40a of notch part 120 position of waist area 30 rearward than the absorbent core 40a and being positioned at of the position of the forward waist area of notch part 110 20, be easy to bend in the mode of the curve of the health (abdominal part and buttocks) along wearer, therefore, it is possible to make the bodily form of shape closer to wearer of disposable diaper 10 itself itself.

As shown in Figure 1, the side, front waist area 20 of notch part 110 edge part and also can be arc-shaped than the edge part of notch 120 side, waist area 30 rearward.

Specifically, the edge part of the side, front waist area 20 of notch part 110 be circular arc be centrally located at the shape more such than the position of this edge part side, waist area 30 rearward, the edge part of the side, rear waist area 30 of notch part 120 be circular arc be centrally located at the shape more such than the position of side, this edge part forward waist area 20.

According to this shape, more easily and cause the distortion of the body curvature along wearer of disposable diaper 1 significantly.

The edge part of the side, front waist area 20 on the product length direction L of notch part 110 forms the 1st revers turn part 115, and the edge part of the side, rear waist area 30 on the product length direction L of notch part 120 forms the 2nd revers turn part 125.

In addition, the 1st revers turn part 115 and the 2nd revers turn part 125 extend along product width direction W, and are configured to the bending basic point of disposable diaper 10.

As depicted in figs. 1 and 2, in the disposable diaper 10 of present embodiment, in its natural state, the centrage that crotch pars contractilis 200 both can cross over product width direction W is symmetrical, also with the centrage of product width direction W for boundary, the difference of the width of the left and right of crotch pars contractilis 200 can be formed as within 10%.

Disposable diaper 10 according to the present embodiment, can be set to the state that center that crotch pars contractilis 200 crosses over the health of wearer is worn on the lower crotch of wearer.

In addition, in the disposable diaper 10 of present embodiment, crotch pars contractilis 200 is arranged dividually with above-mentioned waistline maintaining part and elastic component 71.

And in the disposable diaper 10 of present embodiment, the side, front waist area 20 on the product length direction L of crotch pars contractilis 200 and side, rear waist area 30 are provided with non-telescoping region.

In addition, in the disposable diaper 10 of present embodiment, as depicted in figs. 1 and 2, the length on the product width direction W of absorbent core 40a is configured to waist area 20 in the past and shortens towards lower crotch region 25, and shortens from rear waist area 30 towards lower crotch region 25.

At this, crotch pars contractilis 200 is arranged at the region being shorter in length than predetermined length on the product width direction W of absorbent core 40a.

The product width direction W of absorbent core 40a is shorter in length than in the region of predetermined length, the absorptive capacity of absorber 40 is less, therefore the discharged liquid of wearer is not absorbed by the absorber 40 in this region, and is easy to be absorbed by the absorber 40 of the side, front waist area 20 on the product length direction L in this region and side, rear waist area 30.

Its result, the variable color of instruction unit 65 is easy to side, waist area 20 and the propagation of side, rear waist area 30 forward from this region.

In general, in the region being provided with crotch pars contractilis 200, create the fold caused by crotch pars contractilis 200, therefore wear auxiliary and see that the appearance of the variable color of this instruction unit 65 is different in this region and non-telescoping region.

Consider above aspect, according to said structure, wear auxiliary and also can fix following standard: disposable diaper 10 is not changed in the variable color according to the instruction unit 65 in this region, disposable diaper 10 is changed in the variable color according to the instruction unit 65 in the non-telescoping region of the side, front waist area 20 on the product length direction L in this region and side, rear waist area 30.

Its result, can suppress the excessive replacing of disposable diaper 10, and can know the suitable replacing construction of disposable diaper 10.

(3) formation of instruction unit

In the disposable diaper 10 of present embodiment, there is instruction unit 65.Instruction unit 65 is crossed over crotch pars contractilis 200 and is extended along product length direction L, forms by once touching the colour-changing agent that moisture visually changes.

According to this formation, crotch pars contractilis 200 is when dressing along the health (lower crotch) of wearer, thus instruction unit 65 stably can be present in the position of the scavenge port near wearer.

Its result, can avoid instruction unit 65 state of affairs that variable color is so partially, only in the state of affairs that the variable color of the posterior dorsal generation instruction unit 65 of wearer is such.

And when dressing, the scavenge port of wearer is mutually close with crotch pars contractilis 200, therefore, it is possible to make the variable color of initial instruction unit 65 stably result from the lower crotch region 25 of disposable diaper 10.

As shown in Figure 4, this instruction unit 65 also can be configured to centrage with respect to product width direction W and the imaginary line extended along product length direction is extended with many substantially in parallel.

In addition, when crotch pars contractilis 200 is made up of the telescopic sheet of opaque liquid, instruction unit 65 is configured at the skin abutment face side of telescopic sheet.On the other hand, when crotch pars contractilis 200 is made up of the telescopic sheet of liquid permeability, instruction unit 65 is configured at the non-skin abutment face side of crotch pars contractilis 200.

In addition, the change (variable color) of above-mentioned instruction unit 65 can look confirmation from the non-skin abutment face sidelong glance of disposable diaper 10.Such as, when instruction unit 65 is configured at the skin abutment face side of telescopic sheet, preferably, the light penetration of telescopic sheet is 60% ~ 87%.According to this structure, can look from the non-skin abutment face sidelong glance of disposable diaper 10 change (variable color) confirming instruction unit 65.

More than 1/2 of the width of in the width of the crotch pars contractilis 200 on the W of the product width direction region existing for the crotch pars contractilis of absorbent core 40a, on the W of product width direction absorbent core 40a.

Thus, be configured with more than the constant width at the position of absorbent core 40a by utilizing crotch pars contractilis 200 to make and shrink, thus absorbent core 40a shrinks, mention absorbent core 40a in the mode of the health near wearer.

By utilizing lower crotch region to realize mentioning of such absorbent core 40a, the gap between disposable diaper 10 and wearer can be reduced.The width of the crotch pars contractilis 200 on the W of product width direction is more than 60% of the width of the absorber 40 (absorbent core 40a) on the W of product width direction, more preferably, more than 80%, the gap between disposable diaper 10 and wearer can be reduced further.

And, if the width of crotch pars contractilis 200 is narrow compared with the width of absorbent core 40a, be then difficult to obtain the effect mentioning above-mentioned absorbent core 40a.On the other hand, if the width of crotch pars contractilis 200 is wide compared with the width of absorbent core 40a, then dress disposable diaper 10 under the state of more shrinking than the position being configured with absorbent core 40a at the position not being configured with absorbent core 40a.Thus, form the component not being configured with the position of absorbent core 40a overlapping, crotch pars contractilis 200 is hardening, and the wearing comfort impression of disposable diaper 10 is damaged.

Such as, when the size at the position in the region existing for the crotch pars contractilis of absorbent core 40a, width is the narrowest (under elongation state) is for 120mm, preferably, the width of crotch pars contractilis 200 is 60mm ~ 110mm.Further preferably, the width of crotch pars contractilis 200 is 90mm ~ 110mm.

Preferably, the position that the width of absorbent core 40a is the narrowest on the W of product width direction is arranged on the position relative to the forward side 10mm ~ 60mm of product length direction centrage.Preferably, on the W of product width direction, the most narrow portion position of the width of absorbent core 40a is arranged on the position relative to the forward side 20mm ~ 40mm of product length direction centrage.Preferably, crotch pars contractilis 200 is crossed over the narrowest position of the width of absorbent core 40a on the W of product width direction and is formed.

The huckle of the left and right of wearer each other immediate position is the position of side more forward than the center on the fore-and-aft direction of the health of wearer.Thus, under the effect of the contractility of crotch pars contractilis 200, position the narrowest for the width of absorbent core 40a on the W of product width direction can be configured in energetically the huckle immediate position each other of the left and right of wearer.In other words, even if mother etc. wear the para-position that auxiliary does not carry out absorbent core 40a, the para-position of absorbent core 40a also naturally can be carried out.

In addition, instruction unit 65 is configured to exceed crotch pars contractilis 200 from the region that absorbent core 40a is overlapping with crotch pars contractilis 200 along product length direction L and extends.

According to this structure, utilize crotch pars contractilis 200 to mention absorbent core 40a and instruction unit 65 in the mode of the health along wearer, under the state of the health along wearer, can stably dress disposable diaper 10.

In addition, the aberration of the L* of the L*a*b* color specification system between the peripheral region of the overlapping region overlapping with instruction unit of outer load 60 and the overlapping region of outer load 60 is configured to the aberration of aberration higher than this L* under the state before instruction unit variable color of this L* under the state after instruction unit variable color.

According to this structure, the instruction unit after variable color can be made more eye-catching, instruction unit can be utilized easily to know replacing construction.And, such as, not eye-catching by the instruction unit being configured to the state before making variable color, the visuality of instruction unit can be reduced under the state before body fluid is discharged.The display of the functional surfaces of disposable diaper can be suppressed, the texture as underwear can be embodied.

Specifically, the color of the peripheral region of the overlapping region of outer load 60 is colors of outer load 60 self, mostly generally is white.The L-value of white is 100.In the disposable diaper with so outer load 60, (overlapping region after variable color is set to blueness (L-value: 70) by L-value: 95) overlapping region before variable color can be set to yellow.According to this structure, the instruction unit before making variable color can be configured to not eye-catching, and make the instruction unit after variable color eye-catching.

In addition, the standard of the beasurement base of light penetration Japan JIS-K7105, employs colour difference meter (Japanese electric color industry (strain) glimmer light-metering formula colour difference meter Z-300A).Specifically, the sample of width 5mm, length 5mm to be sandwiched in scopometer and to obtain TT value, can by the TT value obtained be obtained as total light transmittance (%).

(4) structure of outer load

Then, outer load 60 is described in detail based on Fig. 5 and Fig. 6.Fig. 5 is the schematic rear view after the part A shown in Fig. 4 being amplified, and Fig. 6 is the sectional view of the F3-F3 line shown in Fig. 5.

Outside on load, be processed to form concaveconvex shape (fold) by embossing.More particularly, outside load 60 is formed with protuberance 61 and recess 62.Recess 62 is by embossing processing through-thickness by the part compressed, and is the part that the thickness of the Thickness Ratio protuberance 61 of outer load is thin.Protuberance 61 is parts that the thickness of Thickness Ratio recess 62 is thick, is not by the part of embossing processing compression or the degree of the compression part lower than the degree of the compression of recess 62.

Outer load 60 is by weight per unit area 10g/m ²~ 40g/m ²non-woven fabrics form.Present embodiment is by weight per unit area 25g/m ²spun-bonded non-woven fabrics form.If the weight per unit area of non-woven fabrics is greater than 40g/m ², be then difficult to suppress the fluffing of outer load and be difficult to guarantee the flexibility of outer load 60, being easy to produce fine hair.On the other hand, if the weight per unit area of non-woven fabrics is less than 10g/m ², then enforcement embossing add sometimes be difficult to man-hour formed concavo-convex.

The outer load 60 of present embodiment is formed with protuberance 61 and recess 62 by implementing embossing processing to the roughly uniform sheet material of the weight per unit area of the fiber forming non-woven fabrics.Therefore, the fibre density of protuberance 61 is lower than the fibre density of recess 62.

The region being formed with protuberance 61 of outer load 60 forms to look from the non-skin abutment face sidelong glance of outer load 60 and confirms the 1st region R1 of instruction unit, and the region being formed with recess 62 of outer load 60 forms the visuality of the instruction unit wherein 2nd region R2 higher than the visuality of the instruction unit in the 1st region R1.That is, outside load 60 is formed with two regions that the visuality of instruction unit is different.At least partially with the 2nd region R2 of the 1st region R1 overlaps with instruction unit at least partially.

Like this, the 1st region R1 that the visuality of instruction unit is different and the 2nd region R2 is formed at outer load 60, therefore during visual confirmation disposable diaper, visually cannot confirm under the form that whole of instruction unit is identical from outside wearing auxiliary etc., can visually confirm when local is different.Such as, if see, instruction unit entirety is identical, then emphasize the functional surfaces of disposable diaper, and design reduces, or visual affirmant is difficult to feel the texture such as skin sense of touch sometimes.

But, the 2nd region R2 higher by the visuality that arranges instruction unit and the lower part 1 of the visuality of instruction unit, thus can the such as display instruction unit in striated, or periodically can show instruction unit.Therefore, it is possible to suppress by the reduction of the excessively eye-catching texture caused of instruction unit.

In addition, as long as the 1st region R1 is different from the visuality that the 2nd region R2 is configured at least instruction unit, the 1st region R1 also can be configured to the variable color form being difficult to grasp instruction unit.Such as, even if when the 1st region R1 is configured to the variable color form being difficult to grasp instruction unit, wears auxiliary also can grasp instruction unit variable color form by the 2nd region R2, can replacing construction be grasped.

In addition, also can be configured to by making the 1st region R1 and the 2nd region R2 present the color that can distinguish, thus the visuality of the 1st region R1 is different from the visuality of the 2nd region R2.Specifically, such as, by making density, the loft of the fiber of the outer load of formation different, thus the color forming the fiber of outer load is different, and the 1st region R1 and the 2nd region R2 presents the color that can distinguish.In addition, by making density, the loft of the fiber of the outer load of formation different, thus through the color difference that outer load is seen, the 1st region R1 and the 2nd region R2 presents the color that can distinguish.

In addition, stacked with the instruction unit at least partially structure of the 1st region R1 and stacked with the instruction unit at least partially structure of the 2nd region R2 not only comprise the outer load 60 that is provided with the 1st region R1 and the 2nd region R2 structure directly overlapping with instruction unit but also comprise as in the present embodiment across the concept of the structure of back sheet 60a overlap.In other words, be position relationship overlapping under the state of overlooking shown in Fig. 2 and Fig. 4.

In addition, preferably, the light penetration of outer load 60 is 60% ~ 90%.According to this structure, can look from the non-skin abutment face sidelong glance of disposable diaper 10 change (variable color) confirming instruction unit 65.The light penetration of the outer load 60 of present embodiment is 77%.

1st region R1 of outer load 60 is the protuberances 61 be processed to form by embossing, and the 2nd region R2 of outer load 60 is the recesses 62 be processed to form by embossing.Recess 62 is crimped and filming fiber by embossing processing.Therefore, compared with before processing with embossing, light penetration raises.On the other hand, protuberance 61 is the parts not implementing embossing processing, and loft is higher, and light penetration is lower than the light penetration of recess 62.

Like this, by utilizing embossing to be processed to form recess 62 and protuberance 61, the distant protuberance 61 of the recess 62 of the close together of the thickness direction apart from instruction unit and the thickness direction apart from instruction unit easily can be formed.

In addition, the outer load 60 by the surface in the outside at formation disposable diaper is formed the recess 62 based on embossing processing and protuberance 61, the skin sense of touch on the surface in the outside of disposable diaper can be improved.

In addition, it is desirable that, the protuberance 61 of outer load is more than 0.55mm with the difference in size on the thickness direction of recess 62.When the protuberance 61 of load is more than 0.55mm with the difference in size on the thickness direction of recess 62 outside, visuality based on the instruction unit of protuberance and recess is easy to different, can play the function of instruction unit and effectively improve the texture of disposable diaper entirety.

In addition, protuberance 61 such as can utilize following methods to measure with the difference in size on the thickness direction of recess 62.When being bonded to outer load on disposable diaper, cold spraying machine (such as, MIKASAMG-3003) is utilized to peel off outer load.Then, use the cutting knife spare blade HA-100 of such as Kokuyo Inc. to cut out and comprise the recess of the measuring point becoming outer load and the region of protuberance.Use microscope (Japanese KEYENCE company VHX-100), observe the cross section in product length direction, measure the thickness of protuberance and recess respectively, calculate the difference of the thickness of protuberance and recess.Sample size is 5, and what this differed from is average as protuberance 61 and the difference in size on the thickness direction of recess 62.

Crotch pars contractilis 200 as the pars contractilis stretched along at least either direction in product length direction and product width direction is being provided with by the position of skin abutment face side than back sheet 60a.Overlapping with instruction unit at least partially of crotch pars contractilis 200.

By making crotch pars contractilis 200 flexible along product length direction, thus instruction unit, back sheet 60a and outer load 60 also shrink along product length direction.Now, the recess 62 of outer load 60 due to fiber closeer and be difficult to shrink, the protuberance 61 of outer load 60 is comparatively dredged due to fiber and is easy to shrink.Therefore, overlapping with crotch pars contractilis outer load 60, the difference of size on the thickness direction of size on the thickness direction of protuberance 61 and recess 62 becomes more obvious.The protuberance 61 of outer load 60 becomes greatly with the difference of the size on the thickness direction of recess 62, thus the visuality of the visuality of the 1st region R1 and the 2nd region R2 is different also than apparition.

In addition, when utilizing crotch pars contractilis to shrink, protuberance 61 is out of shape in the mode of floating from back sheet 60a side (instruction unit side), and therefore protuberance 61 is thickening, and the fiber forming protuberance 61 carries out diffuse-reflectance.Therefore, the visuality of the instruction unit in the 1st region R1 reduces further.

Back sheet 60a and outer load 60 are bonded with each other by the bonding agent coating back sheet 60a or outer load 60 intermittently.In the present embodiment, whole that sheet 60a contacts with outer load 60 is overleaf stained with bonding agent by curtain coating, and by this bonding agent, back sheet 60a engages with outer load 60.

Such as, when the bonding agent that load 60 and back sheet 60a coat whole by means of directly be coated with outside engages, outer load 60 and back sheet 60a mono-body deformability, therefore outer load 60 and back sheet 60a are difficult to flexibly be out of shape.Therefore, even if the lower outside load 60 of situation sometimes shunk at crotch pars contractilis etc. is also difficult to utilize the contraction of crotch pars contractilis to shrink.And style is also deteriorated and becomes unlike underwear sometimes.In view of this problem, preferably, the bond area rate between outer load 60 and back sheet 60a is less than 20%.

Owing to being bonded with each other by the bonding agent coating back sheet 60a or outer load 60 intermittently, be therefore provided with part that outer load 60 engages with back sheet 60a and the part that outer load 60 does not engage with back sheet 60a.Therefore, the part that outer load 60 can be utilized to engage with back sheet 60a suppresses position to offset, and be out of shape the plurality of flexible that can utilize the contraction of crotch pars contractilis that outer load 60 is not engaged with back sheet 60a, the protuberance 61 of outer load 60 can be made more different from the visuality of recess 62.

In addition, when the bond area rate outside between load 60 and back sheet 60a is less than 3%, adhesive spots is very few, sometimes excessively creates floating between outer load 60 and back sheet 60a when shrinking.In the 1st region that visuality is higher, also sometimes produce owing to there is no multiple abutment and float, visual reduction.Therefore, visual difference is not due to protuberance 61 and the configuration pattern of recess 62 sometimes, but the contraction pattern owing to being caused by adhesive spots.Therefore, desirably bond area rate is higher than 3%.

Be of a size of 3.0mm ~ 15.0mm as the 1st region R1 on the product length direction of the shrinkage direction of pars contractilis, be of a size of 2.0mm ~ 13.6mm as the 1st region R1 on the product width direction of the orthogonal direction orthogonal with shrinkage direction.The size of the 1st region R1 on product length direction is 1.1 ~ 1.5 relative to the ratio of the size of the 1st region R1 on product width direction.

When the size of the 1st region R1 is less than 2.0mm, be difficult to distinguish visuality different based on recess and protuberance, not preferably.In addition, when the size of the 1st region R1 is greater than 15.0mm, be sometimes difficult to see instruction unit itself, and the texture being easy to produce fluffing and likely damaging as underwear, therefore not preferred.

Length due to the 1st region R1 on the shrinkage direction of crotch pars contractilis is longer than the length of the 1st region R1 on orthogonal direction, therefore, when load 60 utilizes the contraction of crotch pars contractilis 200 to shrink outside, the size of the 1st region R1 on the size of the 1st region R1 on shrinkage direction and orthogonal direction can be made to be close.

In addition, such as, if the size of the 1st region R1 on shrinkage direction relative to the ratio of the size of the 1st region R1 on orthogonal direction higher than 1.5 times, even if under the state that then load 60 shrinks outside, the size of the 1st region R1 on shrinkage direction is also long, and shape during the overlooking of protuberance 61 becomes sharp-pointed shape.Therefore, wear auxiliary etc. and sometimes feel that outer load 60 is comparatively hard, or obtain the stronger impression of stimulation.In order to suppress the impression of such texture to reduce, preferably, the size of the 1st region R1 on the size of the 1st region R1 on the orthogonal direction under contraction state and shrinkage direction is close.By making the size of the 1st region R1 on the size of the 1st region R1 on the orthogonal direction under contraction state and shrinkage direction be close, thus protuberance 61 is close to square, circular, can suppress sharp-pointed impression.

The 1st region R1 in the product length direction under the elongation state of present embodiment is of a size of 7mm, and the 1st region R1 in product width direction is of a size of 6mm.In addition, the shrinkage factor based on crotch pars contractilis of outer load 60 is 1.1 times ~ 1.5 times.Such as, if the shrinkage factor of outer load 60 is less than 1.1 times, then the contraction of outer load 60 is insufficient, and protuberance 61 cannot be made to float to non-skin abutment face side fully.On the other hand, if the shrinkage factor of outer load 60 is higher than 1.5 times, then the 2nd region R2 being formed with recess 62 also shrinks, sometimes cannot by the visual confirmation instruction unit of the 2nd region R2.

In addition, it is desirable that, the shrinkage direction of outer load 60 is along the differently-oriented directivity of fiber of non-woven fabrics forming outer load 60.Shrink by making outer load 60 in the differently-oriented directivity of the fiber of non-woven fabrics, from instead of fiber spacing from narrowing but filament contraction, therefore each bar fiber shrinks for the form mentioned with three-dimensional on the direction orthogonal with orientation, is out of shape, and the loft of the 1st region R1 can be formed get Geng Gao.On the other hand, if shrink on the direction orthogonal with the differently-oriented directivity of fiber, be then out of shape from the mode narrowed with fiber spacing, fiber two dimension distortion close to each other, therefore cannot be formed higher by the loft of the 1st region R1 effectively.

In addition, the size of the 1st region R1 on product length direction relative to the size of the 1st region R1 on product width direction ratio based on crotch pars contractilis expansion and contraction and can 1.1 ~ 1.5 be set as.

(5) comparative evaluation

Table 1 represents the comparative evaluation result of outer load.As shown in table 1, test is implemented to the outer load of embodiment 1 ~ embodiment 3 and comparative example 1 ~ comparative example 3.

[table 1]

As shown in table 1, evaluation is compared to the outer load of embodiment 1 ~ embodiment 3 and comparative example 1 ~ comparative example 3.In the test of comparative evaluation, use the disposable diaper " moony tape type S code " of Japanese Unicharm Corp. that market is sold, by the outer load of the outer load and comparative example 1 ~ comparative example 3 of changing embodiment 1 ~ embodiment 3 in disposable diaper, thus get out the sample of evaluation test.In addition, the outer load of embodiment 1, embodiment 2 and comparative example 1 ~ comparative example 3 is made up of spun-bonded non-woven fabrics, and the outer load of embodiment 3 is made up of hot-wind nonwoven cloth.

In evaluation test, often to use 20 mothers of the disposable diaper " moony tape type S code " of Japanese Unicharm Corp. for object, inquiry " about the Visual Performance of instruction unit, whether instruction unit entirety is identical ".

For this inquiry, the sample of ratio more than 70% of the number answering following (1) is evaluated as sensory evaluation (sense of touch) good, is evaluated as zero.In addition, it is not very good that the sample being less than 70% by the ratio answering the number of following (1) is evaluated as sensory evaluation (sense of touch), be evaluated as ×.

(1) instruction unit exists different on the whole at Visual Performance

(2) instruction unit does not have difference (identical) at Visual Performance on the whole

According to the result of such evaluation test, preferably, the difference in size on the thickness direction of recess and protuberance is more than 0.55mm.

(6) other embodiments

In addition, the shape (embossed pattern) of the recess 62 during the overlooking of present embodiment is diamond shape, as long as at least both recess 62 and protuberance 61 overlap with instruction unit, is not limited to this structure.

Such as, in the disposable diaper that instruction unit configures along product length direction, also can be that recess 62 extends along product width direction, and is formed multiple on product length direction at spaced intervals.In addition, in the disposable diaper that instruction unit configures along product width direction, also can be that recess 62 extends along product length direction, and is formed multiple on product width direction at spaced intervals.

In addition, the instruction unit of present embodiment is provided with 3 along product length direction, the size of the width of each instruction unit and the measure-alike of product length direction.But, product length direction or product width direction are provided with at spaced intervals in multiple instruction units, also can be that the area being positioned at the instructions of the Central Committee portion of product length direction central authorities or product width direction central authorities is greater than the area being positioned at the sidepiece instruction unit leaning on the position outside product length direction or outside product width direction than instructions of the Central Committee portion.

In multiple instruction unit, if constant area, then different because wearing auxiliary, feel dull sometimes because of instruction unit and the impression of machinery.But, different by the area being configured to multiple instruction unit, the shape of instruction unit can be utilized to give prominence to third dimension, texture, flexibility can be given further.Particularly by increasing the width being positioned at the instructions of the Central Committee portion at center, product width direction, reduce the width of sidepiece instruction unit, thus can with side in front of being centrally located at of health and the mode expanded on depth direction outside width emphasizes the shape of disposable diaper, third dimension improves further.

And the instructions of the Central Committee portion being positioned at product length direction central authorities or product width direction central authorities is easy to contact body fluid than sidepiece instruction unit and is easy to variable color.Therefore, by the area making the area in instructions of the Central Committee portion be greater than sidepiece instruction unit, the instruction unit being easy to variable color can be made eye-catching.

In addition, the structure that area is larger can illustrate the longer structure of the length of bearing of trend of the longer structure of width on the direction orthogonal with the bearing of trend of instruction unit, instruction unit.

In addition, as long as outer load 60 is provided with the visuality of instruction unit the 1st different region R1 and the 2nd region R2, as the concrete structure of the 1st region R1 and the 2nd region R2, be not limited to the protuberance 61 that is processed to form by embossing and recess 62.

Such as, both can be that the thickness of the outer load 60 in the 1st region R1 is configured thicker than the thickness of the outer load 60 in the 2nd region R2, also can be that the fibre density of the non-woven fabrics of the outer load 60 in formation the 1st region R1 is configured higher than the fibre density of the non-woven fabrics of the outer load 60 in formation the 2nd region R2, can also be that the fiber weight per unit area of the non-woven fabrics of the outer load 60 in formation the 1st region R1 is configured higher than the fibre density of the non-woven fabrics of the outer load 60 in formation the 2nd region R2, can also be these structures of combination.

Such as, be configured by the fiber weight per unit area of the non-woven fabrics by the outer load 60 in formation the 1st region R1 higher than the fibre density of the non-woven fabrics of the outer load 60 in formation the 2nd region R2, the outer load with the higher protuberance of loft and the lower recess of loft can be obtained.According to this outer load, the fibre weight of recess is less than the fibre weight of protuberance, is therefore easy to produce visual difference at protuberance and recess.

In the above-described embodiment, describe the purport that disposable diaper 10 suitably can be applied as infant use, range of application of the present invention is not limited to the disposable diaper of infant, certainly also can be applied to the disposable diaper of such as child's use, adult.

Like this, the present invention is included in this various embodiments etc. do not recorded certainly.Thus, protection scope of the present invention is only determined by the specified features of appropriate claims according to the above description.

In addition, Japanese Patent go out to be willing to the full content of No. 2012-259160 (application on November 27th, 2012) by referring to and be introduced in the description of the application.

utilizability in industry

Can provide a kind of can play instruction unit function and the disposable diaper of the texture of disposable diaper entirety can be improved

description of reference numerals

10, disposable diaper; 20, front waist area; 25, lower crotch region; 30, rear waist area; 35, leg opening part; 40, absorber; 40a, absorbent core; 40b, core covering; 50, positive dough sheet; 60a, back sheet; 60, outer load; 61, protuberance; 62, recess; 70, flank; 75, leg pars contractilis; 80, leg side rivel; 90, magic tape; 200, crotch pars contractilis; R1, the 1st region; R2, the 2nd region.

Claims

1. a disposable diaper, wherein,

This disposable diaper has front waist area, rear waist area and the lower crotch region between described front waist area and described rear waist area,

This disposable diaper has from described front waist area towards the product length direction of described rear waist area and the product width direction orthogonal with described product length direction,

This disposable diaper comprises:

Absorber, it crosses over described lower crotch region, and extends at least one in described front waist area and described rear waist area;

The back sheet of opaque liquid, it is configured in than the position of described absorber by non-skin abutment face side;

Outer load, its be configured in than described back sheet by described non-skin abutment face side position and be made up of non-woven fabrics; And

Instruction unit, it is configured in than the position of described back sheet by skin abutment face side, is configured to visually change once touching moisture,

Described outer load is provided with and can looks the visuality of the 1st region and the described instruction unit wherein confirming described instruction unit 2nd region higher than the visuality of the described instruction unit described 1st region from the non-skin abutment face sidelong glance of described outer load,

Described 1st region at least partially with the overlapping with described instruction unit at least partially of described 2nd region.

2. disposable diaper according to claim 1, wherein,

Leaning on the position of skin abutment face side to be provided with along the flexible pars contractilis of at least either direction in described product length direction and described product width direction than described back sheet,

Overlapping with described instruction unit at least partially of described pars contractilis.

3. disposable diaper according to claim 2, wherein,

Described back sheet and described outer load are bonded with each other by the bonding agent coating described back sheet or described outer load intermittently.

4. the disposable diaper according to Claims 2 or 3, wherein,

Described 1st region on the shrinkage direction of described pars contractilis is of a size of 3.0mm ~ 15.0mm,

Described 1st region on the orthogonal direction orthogonal with described shrinkage direction is of a size of 2.0mm ~ 13.6mm,

The size in described 1st region on described shrinkage direction is 1.1 ~ 1.5 relative to the ratio of the size in described 1st region on described orthogonal direction.

5. disposable diaper according to any one of claim 1 to 4, wherein,

On described outer load, be processed to form protuberance and recess by embossing,

Described 1st region is the region being provided with described protuberance, and described 2nd region is the region being provided with described recess.

6. disposable diaper according to claim 5, wherein,

Difference in size on the thickness direction of described protuberance and described recess is more than 0.55mm.

7. disposable diaper according to any one of claim 1 to 6, wherein,

Described instruction unit is provided with multiple at spaced intervals on described product length direction or described product width direction,

The area being positioned at the instructions of the Central Committee portion of the central authorities in described product length direction or the central authorities in described product width direction is greater than the area being positioned at the sidepiece instruction unit leaning on the position in the outside in described product length direction or the outside in described product width direction than described instructions of the Central Committee portion.

8. disposable diaper according to any one of claim 1 to 7, wherein,

For the aberration of the L* of the L*a*b* color specification system between the overlapping region overlapping with described instruction unit of described outer load and the peripheral region of the described overlapping region of described outer load, the aberration of this L* under the state after described instruction unit variable color is higher than the aberration of this L* under the state before described instruction unit variable color.