CN105792785B

CN105792785B - Absorbent commodity

Info

Publication number: CN105792785B
Application number: CN201480065500.1A
Authority: CN
Inventors: 山口达之; 加藤隆弘; 塚本祐贵
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2013-12-11
Filing date: 2014-11-20
Publication date: 2019-11-19
Anticipated expiration: 2034-11-20
Also published as: CN105792785A; TWI660718B; TW201529055A; JP6257297B2; WO2015087680A1; JP2015112235A

Abstract

The present invention provides a kind of absorbent commodity, it has the absorbent core (4) of the longer shape on the front-rear direction of absorbent commodity, and absorbent core (4) is in the width direction, side region (45,45) with middle section (41) and its two sides, middle section (41) have upper surface more respective than side region protruding portion (5) outstanding upwards.The middle section (41) of absorbent core (4) and side region (45) are integrally formed, and have the high density portion (41a) that density ratio protruding portion (5) are high and grammes per square metre is higher than side region (45) in the both sides of middle section (41).Cannelure (50) alongst is formed in the skin abutment face of protruding portion (5), the cannelure (50) be reduce absorbent core forming material grammes per square metre and formed, and there is bottom (50b) in non-skin abutment face side, the width direction length of the bottom (50b) of cannelure (50) is narrower than opening portion (50a).

Description

Absorbent commodity

Technical field

The present invention relates to the absorbent commodities such as sanitary napkin, panty liner (secretion protection pad), incontinence protection.

Background technique

At present it is known that the absorber in the absorbent commodities such as sanitary napkin, along the recessed of the skin of wearer The mode of convex form is provided with protrusion, in addition, it is also known that forms slotted technology in the protrusion.For example, in patent document 1, the central portion disclosed in 2 in absorber is formed about the absorber for having slotted protrusion.

In addition, disclosing following technology in patent document 3: including being arranged in two of high portion in excretory portion counterpart The region of side is configured with high-density region, thus improves the diffusion and retention property of body fluid.

Existing technical literature

Patent document

Patent document 1: Japanese Patent Laid-Open 2009-112590 bulletin

Patent document 2: Japanese Patent Laid-Open 2012-125366 bulletin

Patent document 3: Japanese Patent Laid-Open 2011-120696 bulletin

Summary of the invention

There is the lamination including the upper and lower to construct for absorber in patent document 1, and there are upper layer and formation There is the middle section of protrusion, is formed with recess portion in entire upper and lower level.However, the recess portion is formed by hot Embossing processing , the bottom of recess portion is nearby by densification, therefore liquid is not easy near the bottom of recess portion to spread to other parts, anti-wet (Wetback) there is room for improvement in terms of the effective use of the absorptive capacity for preventing performance and absorber.

In addition, in patent document 2, disclosing and being provided with equally in the absorber with multiple block-like protrusions by multiple The protrusion that protrusion is constituted, and make middle high portion blocky absorption portion density ratio around it is high.The blocky of high portion absorbs in however, The density in portion is integrally improved by compressing the blocky absorption portion, and the density in the blocky absorption portion becomes uniformly, Therefore there is room for improvement in the diffusivity in body fluid from fluid drainage portion to periphery, and then prevent performance and suction in anti-wet There is room for improvement in terms of the effective use of the absorptive capacity of acceptor.

In addition, in patent document 3, disclosing a kind of absorber, has and high portion in excretory portion counterpart is set, The both sides along absorbing articles length direction of high absorber in compression, and make the central portion of absorbent commodity width direction Density is relatively low, and the density in at least part of side portion of the side including middle high portion is relatively high.However, because not having Make the cannelure that liquid promptly penetrates, therefore the infiltration rate of liquid is slow, in terms of promptly providing wearer dry feeling, makes Liquid rapidly infiltrates into the aspect for inside absorber and effectively utilizing the absorptive capacity of absorber, and there are rooms for improvement.

The present invention relates to a kind of suctions of absorbent core with shape longer on the front-rear direction of absorbent commodity The property received article.The absorbent core has middle section and the side region positioned at the middle section two sides in the width direction Domain, the middle section have upper surface more respective than side region protruding portion outstanding upwards.The absorbent core is institute It states middle section and the side region is integrally formed, and is close with the width direction both sides for compressing the middle section Spend the high density portion higher than the protruding portion on the inside of its width direction.It is formed in the skin abutment face of the protruding portion Along the cannelure of the length direction of the absorbent core, the cannelure be reduce absorbent core forming material grammes per square metre and formed, And there is bottom in non-skin abutment face side.Width direction of the width direction length of the bottom of the cannelure than opening portion Length is narrow.

Detailed description of the invention

Fig. 1 is the perspective view for indicating the sanitary napkin of one embodiment of the present invention.

Fig. 2 (a) is the IIa-IIa line sectional view of Fig. 1, and Fig. 2 (b) is the IIb-IIb line sectional view of Fig. 1.

Fig. 3 (a)~Fig. 3 (c) is to form density ratio protruding portion height and grammes per square metre than side region in the both sides of middle section The explanatory diagram of an example of the method in high high density portion.

Fig. 4 is the schematic diagram of the deformation state of the absorbent core under the wearing effect for indicating the sanitary napkin of Fig. 1.

Fig. 5 (a) and Fig. 5 (b) is to indicate in the manufacture along the absorbent core of sanitary napkin shown in Fig. 1 preferably The schematic diagram in the circumferential section of the fine cylinder of the product that ground uses.

Fig. 6 (a) and Fig. 6 (b) is the explanatory diagram for indicating to fall into an example of the forming method of compression unit of cannelure.

Specific embodiment

The issue of the present invention is to provide a kind of absorbent commodities of performance that can further improve the above-mentioned prior art.

Hereinafter, being based on the preferred embodiments of the present invention, on one side referring to attached drawing, the present invention will be described on one side.

The sanitary napkin 1 of an embodiment as absorbent commodity of the invention is (hereinafter, also referred to as sanitary napkin 1) it is adapted for the sanitary napkin for the ight that h.d. uses, the preferably sanitary napkin of length 30cm or more.

As shown in Figure 1, sanitary napkin 1 includes the absorbent main body 6 of longer shape in the longitudinal direction, a pair of of alar part 7,7 With alar part 8,8 after a pair.About absorbent commodities such as sanitary napkins, so-called " front-rear direction " is when wearing and wearer The consistent direction of front-rear direction.In addition, in the present specification, front-rear direction is length direction, orthogonal to that direction is claimed For width direction.

Absorbent main body 6 includes in its longitudinal direction front part A, fluid drainage portion counterpart B and rear part C, in liquid The left and right sides of body excretory portion counterpart B has a pair of of alar part 7,7, the left and right sides of rear part C have it is a pair of after alar part 8, 8.Fluid drainage portion counterpart B is the portion of the central portion of width direction and fluid drainage portion (introitus) relative configuration of wearer Point, front part A is disposed on the part than fluid drainage portion counterpart B by the front side (veutro) of wearer, and rear part B is configuration In the part than fluid drainage portion counterpart B by the back side of wearer.

Sanitary napkin 1 includes: skin lateral plate 2, forms skin abutment face when wearing towards the skin side of wearer；Non- flesh Skin lateral plate 3 is formed in non-skin abutment face when wearing towards garment sides such as shorts；With absorbent core 4, configuration this two Between a piece 2,3.Skin lateral plate 2 has the positive dough sheet 2a of liquid permeability and is bonded on a pair of of three-dimensional shield formation use of its two sides Piece 2b, 2b.The positive dough sheet 2a of liquid permeability is to be configured in a manner of the overall length throughout absorbent main body 6 in absorbent main body 6 Width direction central portion.Three-dimensional shield formation is with piece 2b by the side edge part 21 of the width direction center side of absorbent main body In the state of overlapping on positive dough sheet 2a, position and positive dough sheet 2a in the outside from the slightly inclined width direction of the side edge part 21 are connect It closes.Three-dimensional shield formation (is not schemed with elastomeric element of the piece 2b near the side edge part 21 with three-dimensional shield formation Show), when wearing, utilize the convergent force of the elastomeric element, the distance of fluid drainage portion counterpart B 21 fixed width of side edge part Part erected in a manner of being left from positive dough sheet 2a and form three-dimensional shield.

Alar part 8,8 forms use by the three-dimensional shield extended from the both side edges of absorbent core 4 after a pair of of alar part 7,7 and a pair Piece 2b and non-skin lateral plate 3 are constituted.In the respective face being made of non-skin lateral plate 3 of a pair of of alar part 7, it is provided with for being fixed on The alar part adhesive part (not shown) of the non-skin abutment face of the crotch part of shorts, in the non-skin abutment face of absorbent main body 6, if It is equipped with the main body adhesive part (not shown) of the inner surface for the main body 6 to be fixed on to shorts.Alar part 8 is configured when wearing afterwards On the inner surface (skin abutment face) of shorts.It is preferred that being also equipped in the face of rear alar part 8 being made of non-skin lateral plate 3 for solid It is scheduled on the adhesive part of the inner surface of shorts.Locate in the outer part the peripheral part of the ratio absorbent core 4 of skin lateral plate 2 and non-skin lateral plate 3 It is interconnected by bonding agent, and is engaged in the peripheral part of sanitary napkin 1 by heat sealing.It is preferred that skin lateral plate 2 and suction Also by carrying out the viscous of the patterns such as point, spiral, striped coating between absorbent core 4 and non-skin lateral plate 3 between the property received core 4 It connects agent and is interconnected.

Absorbent core 4 in sanitary napkin 1 by including paper pulp fiber etc. the fiber aggregate of fibrous materials constitute or by this The component that high water absorbency polymer is maintained between the fiber of fiber assembly is constituted.Absorbent core 4 be upper and lower surfaces by by Clad sheet (illustration omitted) cladding that cotton paper or water penetration non-woven fabrics are constituted.Clad sheet is the formation material of absorbent core in order to prevent The leakage of material and improve the conformality of absorbent core and use is.

As shown in Figure 1, absorbent core 4 in sanitary napkin 1 have on direction identical with the front-rear direction of sanitary napkin 1 compared with Long shape.In addition, absorbent core 4 has middle section 41 in width direction Y and is located at it as shown in Fig. 2 (a) and Fig. 2 (b) The side region 45,45 of two sides, the middle section 41 have more upward than the side region 45,45 respective upper surface S2, S2 Side's protruding portion 5 outstanding.

Sanitary napkin 1 is due to the protruding portion 5 under positive dough sheet 2a there are absorbent core 4, and in the width of skin abutment face Direction central portion forms the skin side protrusion 11 outstanding of oriented wearer.

In addition, the width W2 (referring to Fig. 2 (a)) of protruding portion 5 is preferred relative to the ratio of the entire width W1 of absorbent core It is 20% or more, more preferably 30% or more, additionally, it is preferred that for 80% hereinafter, more preferably 70% hereinafter, additionally, it is preferred that be 20% or more 80% hereinafter, more preferably 30% or more 70% or less.

It is being absorbed as shown in Figure 1, the protruding portion 5 of the absorbent core 4 in sanitary napkin 1 and the protrusion 11 being consequently formed have Longer shape on the length direction of property core, forms from the fluid drainage portion counterpart B of sanitary napkin 1 to a part of rear part C. More specifically, it is formed near the front end of fluid drainage portion counterpart B to being near the X-direction central portion of rear part C In the range of only.

Protruding portion 5 and protrusion 11 are preferably on the front-rear direction X of sanitary napkin 1 (absorbent commodity), from fluid drainage portion Counterpart B is formed to a part of rear part C.In addition, protruding portion 5 and protrusion 11 are preferably formed in the front and back of sanitary napkin 1 To in 30% or more length of the overall length of X, more preferably it is formed in 40% or more length of the overall length of sanitary napkin 1, into And it is preferably formed in 50% or more length of the overall length of sanitary napkin 1.About following cannelures 50 and high density portion 41a, It is identical.

The skin abutment face of the protruding portion 5 of absorbent core 4 be formed with along the absorbent core 4 length direction X it is vertical Slot 50, the cannelure 50 be reduce absorbent core forming material grammes per square metre and formed, and non-skin abutment face side have bottom Portion.That is, cannelure 50 is formed not by a part of the compression protruding portion 5 such as Embossing processing, but in a part of protruding portion 5 The low part of grammes per square metre of the forming material of absorbent core is set and is formed.In addition, cannelure 50 is abutted in the skin of absorbent core 4 Face has opening portion 50a, has bottom 50b in non-skin abutment face side.In sanitary napkin 1 shown in Fig. 1, it is arranged in protrusion The cannelure 50 in portion 5 is 1, but the item number that the cannelure of protruding portion is arranged in is not limited to this, can also on width direction Y compartment of terrain It is provided with a plurality of.In sanitary napkin 1, cannelure 50 is configured in such a way that the length direction along protruding portion 5 passes through protruding portion 5.

In addition, the protruding portion 5 in absorbent core 4 is formed with translot 44a, translot 44a and cannelure 50 are equally to reduce to inhale Receive property core 4 forming material grammes per square metre and formed, and non-skin abutment face side have bottom.Translot 44a is along absorbability The width direction Y of core 4 extends.

In sanitary napkin 1 shown in Fig. 1, a plurality of translot 44a has been positioned apart from length direction X in protruding portion 5.It is defending In raw towel 1, translot 44a is arranged in such a way that the width direction along protruding portion traverses protruding portion 5.

As shown in Fig. 2 (a), in the middle section 41 of absorbent core 4, the alternately shape on the width direction Y of absorbent core 4 Cheng Yougao grammes per square metre portion 42 and formed cannelure 50 bottom low grammes per square metre portion 43, low grammes per square metre portion 43 along absorbent core 4 length side Extend to X.High grammes per square metre portion 42 is the grammes per square metre of the forming material of absorbent core part relatively high compared with low grammes per square metre portion 43, Low grammes per square metre portion 43 be the forming material of absorbent core grammes per square metre compared with high grammes per square metre portion 42 the relatively low part of grammes per square metre.

In the middle section 41 of absorbent core 4, the grammes per square metre in the low grammes per square metre portion 43 of the bottom of cannelure 50 is formed relative to Gao Ke The ratio of the grammes per square metre in weight portion 42 is preferably 5% or more, and more preferably 10% or more, additionally, it is preferred that being 50% hereinafter, more preferably 40% hereinafter, additionally, it is preferred that for 5% or more 80% hereinafter, more preferably 10% or more 70% or less.In addition, high grammes per square metre portion 42 Grammes per square metre be preferably 200g/m²More than, more preferably 300g/m²More than, additionally, it is preferred that being 800g/m²Hereinafter, more preferably 700g/m²Hereinafter, additionally, it is preferred that being 200g/m²The above 800g/m²Hereinafter, more preferably 300g/m²The above 700g/m²Below.It is low The grammes per square metre in grammes per square metre portion 43 is preferably 10g/m²More than, more preferably 15g/m²More than, additionally, it is preferred that being 400g/m²Hereinafter, more excellent It is selected as 350g/m²Hereinafter, additionally, it is preferred that being 10g/m²The above 400g/m²Hereinafter, more preferably 25g/m²The above 300g/m²Below.

In the middle section 41 of absorbent core 4, the low grammes per square metre of high grammes per square metre portion 42 not only bottom of the grammes per square metre than forming cannelure 50 Portion 43 is big, and also grammes per square metre portion 43 lower than this is big for thickness.Ratio of the thickness in low grammes per square metre portion 43 relative to the thickness in high grammes per square metre portion 42 Example preferably 5% or more, more preferably 10% or more, additionally, it is preferred that for 50% hereinafter, more preferably 40% hereinafter, in addition, excellent 5% or more 50% is selected as hereinafter, more preferably 10% or more 40% or less.In addition, the thickness in high grammes per square metre portion 42 is preferably 1.5mm or more, more preferably 2mm or more, additionally, it is preferred that being 10mm hereinafter, more preferably 8mm is hereinafter, additionally, it is preferred that be 1.5mm or more 10mm is hereinafter, more preferably 2mm or more 8mm or less.The thickness in low grammes per square metre portion 43 is preferably 0.08mm or more, more Preferably 0.15mm or more, additionally, it is preferred that being 5mm hereinafter, more preferably 4mm is hereinafter, additionally, it is preferred that be 0.08mm or more 5mm Hereinafter, more preferably 0.15mm or more 4mm or less.

Furthermore in the case where including translot 44a the sanitary napkin 1 such as present embodiment and constitute absorbent core, institute State high grammes per square metre portion 42 value and with the associated each value in low grammes per square metre portion 43, as long as not including that the high grammes per square metre portion of translot 44a meets Condition.

[measuring method of the grammes per square metre in high grammes per square metre portion and low grammes per square metre portion]

The single-blade razor manufactured using FEATHER company will be inhaled along the boundary line in high grammes per square metre portion 42 and low grammes per square metre portion 43 The property received core cutting, obtains the small pieces in high grammes per square metre portion 42 and low grammes per square metre portion 43 in a manner of becoming preset area.High grammes per square metre Portion 42 is obtained from cutting the part clipped by a pair of low grammes per square metre portion 43,43 into pieces.That is, high grammes per square metre portion 42 be as by Small block piece that low grammes per square metre portion 43 divides and cut out.The small pieces include the bottom to form the translot 44a extended along width direction Low grammes per square metre portion 48 in the case where, the Gao Ke that will be divided by high grammes per square metre portion 42 with the boundary line in low grammes per square metre portion 43 and low grammes per square metre portion 48 Weight portion 42 cuts out as sample slice and is used to measure.The small pieces in low grammes per square metre portion 43 are will to be sandwiched in a pair of high grammes per square metre portion 42,42 Between narrow part by length become 30mm in a manner of cut into pieces.

These are measured using electronic balance (the electronic balance GR-300 of A&D company manufacture, precision: 4 after decimal point) The weight of small pieces.By calculated weight divided by the area of the small pieces in high grammes per square metre portion 42 or low grammes per square metre portion 43, gram of small pieces is calculated Weight.About each high grammes per square metre portion 42 and low grammes per square metre portion 43, using the average value of the grammes per square metre of 5 small pieces as grammes per square metre.

[measuring method of the thickness in high grammes per square metre portion and low grammes per square metre portion]

The measurement of the thickness in high grammes per square metre portion 42 and low grammes per square metre portion 43 is by measurement in order to be cut to each Site Determination grammes per square metre The thickness of small pieces out carries out.With the pressure of 5kPa to the high grammes per square metre portion 42 and low grammes per square metre portion 43 cut out from absorbent commodity The determination part of small pieces pressurizes 10 minutes, is measured immediately after discharge.The middle section of sample after discharge, by size 20mm × 20mm, thickness 3mm acrylic panel be placed on absorber 3, using KEYENCE company manufacture it is contactless swash Light displacement meter (laser head LK-G30, displacement meter LK-GD500), measures the thickness of sample.The small pieces cut out size compared with It is small and be difficult to be utilized in the case that non-contacting Laser Displacement meter is measured, such as microscope can also be used (KEYENCE is public Take charge of the VHX-1000 of manufacture), the section of the cut off sample is observed, with 20~100 times of multiplying power to be measured.

In the middle section 41 of absorbent core 4, high grammes per square metre portion 42 compared with forming the low grammes per square metre portion 43 of bottom of cannelure 50, The density of absorption piece is got higher.It is such composition for example by the step of manufacturing absorbent core 4 to the central area of absorbent core 4 It pressurizes and obtains in domain 41.At this point, the pressure of pressurization concentrates on the thicker high grammes per square metre portion 42 of thickness, the low grammes per square metre portion 43 of thinner thickness Pressure is not born because of pressurization, will not be compressed.In this way, being designed to make high grammes per square metre portion 42 and only compressing high grammes per square metre portion 42 The density of absorption piece is got higher for low grammes per square metre portion 43.In addition, in the middle section 41 of absorbent core 4, in absorbability The low grammes per square metre portion 48 in high grammes per square metre portion 42 and the bottom for forming translot 44a is alternately formed on the length direction X of core 4.High grammes per square metre Compared with forming the low grammes per square metre portion 48 of bottom of translot 44a, the density of absorption piece is also got higher in portion 42.Furthermore density can pass through It is calculated using the grammes per square metre and the thickness that are obtained based on above-mentioned measuring method.

On the other hand, in the side region 45 of absorbent core 4, high grammes per square metre portion 46 is low with the bottom of formation side cannelure 52 Grammes per square metre portion 47 compares, and the density of absorption piece is also got higher.It is such to be configured to obtain as follows.The side of absorbent core 4 Region 45 is pressurized from pressurizeing to middle section 41 the step of in different step.It is concentrated by the pressure that pressurization applies In the thicker high grammes per square metre portion 46 of thickness, the low grammes per square metre portion 47 of thinner thickness does not bear pressure because of pressurization, will not be compressed.Such as This, be designed to make and only compressing high grammes per square metre portion 46 high grammes per square metre portion 46 for low grammes per square metre portion 47 absorption piece it is close Degree is got higher.Furthermore the pressurization steps utilized in the step are to try to use the shape for being carved into using digging and being equivalent to middle section 41 The pressure roller of shape or only the side region 45 for being equivalent to absorbent core 4 part there are measures such as the rollers of press section, come only to suction The side region pressurization of the property received core 4.

Moreover, by formation in the above described manner, there are the high grammes per square metre portions 42 and low grammes per square metre portion 43 of grammes per square metre difference and density contrast, and In the skin abutment face of the middle section 41 of absorbent core 4, be formed with it is extending on the length direction X of absorbent core 4 respectively, The cannelure 50 being recessed to non-skin abutment face side.In the present specification, the skin abutment face of absorbent commodity or its component parts Be absorbent commodity or its component parts when wearing towards the face of the skin side of wearer, absorbent commodity or its constituting portion The non-skin abutment face of part be absorbent commodity or its component parts when wearing towards the opposite side of the skin side of wearer Face.

In addition, as shown in Fig. 2 (a), in the side region 45 of absorbent core 4, on the width direction Y of absorbent core 4 High grammes per square metre portion 46 and low grammes per square metre portion 47 are alternately formed, each low grammes per square metre portion 47 prolongs along the length direction X of absorbent core 4 It stretches.The grammes per square metre of the forming material of the absorbent core in high grammes per square metre portion 46 is relatively high compared with low grammes per square metre portion 47, low grammes per square metre portion 47 Absorbent core forming material grammes per square metre compared with high grammes per square metre portion 46 grammes per square metre it is relatively low.

Moreover, by being formed with high grammes per square metre portion 46 and low grammes per square metre portion 47 there are grammes per square metre difference and density contrast in the above described manner, And the skin abutment face in the side region 45 of absorbent core 4, it is also formed with and prolongs on the length direction X of absorbent core 4 respectively A plurality of side cannelure 52 stretching, being recessed to non-skin abutment face side.

In the side region 45 of absorbent core 4, formed the grammes per square metre in the low grammes per square metre portion 47 of the bottom of side cannelure 52 relative to The ratio of the grammes per square metre in high grammes per square metre portion 46 is preferably 5% or more, and more preferably 10% or more, additionally, it is preferred that for 50% hereinafter, more Preferably 40% hereinafter, additionally, it is preferred that for 5% or more 50% hereinafter, more preferably 10% or more 40% or less.In addition, Gao Ke The grammes per square metre in weight portion 46 is preferably 50g/m²More than, more preferably 100g/m²More than, additionally, it is preferred that being 400g/m²Hereinafter, more excellent It is selected as 300g/m²Hereinafter, additionally, it is preferred that being 50g/m²The above 400g/m²Hereinafter, more preferably 100g/m²The above 300g/m²With Under.The grammes per square metre in low grammes per square metre portion 47 is preferably 2.5g/m²More than, more preferably 5g/m²More than, additionally, it is preferred that being 200g/m²Hereinafter, More preferably 150g/m²Hereinafter, additionally, it is preferred that being 2.5g/m²The above 200g/m²Hereinafter, more preferably 5g/m²The above 150g/m² Below.

In the side region 45 of absorbent core 4, not only grammes per square metre is lower than the bottom of formation side cannelure 52 in high grammes per square metre portion 46 Grammes per square metre portion 47 is big, and also grammes per square metre portion 47 lower than this is big for thickness.Thickness of the thickness in low grammes per square metre portion 47 relative to high grammes per square metre portion 46 Ratio be preferably 5% or more, more preferably 10% or more, additionally, it is preferred that being 50% hereinafter, more preferably 40% hereinafter, another Outside, preferably 5% or more 50% hereinafter, more preferably 10% or more 40% or less.In addition, the thickness in high grammes per square metre portion 46 is preferably 0.8mm or more, more preferably 1mm or more, additionally, it is preferred that being 5mm hereinafter, more preferably 4mm is hereinafter, additionally, it is preferred that be 0.8mm or more 5mm is hereinafter, more preferably 1mm or more 4mm or less.The thickness in low grammes per square metre portion 47 is preferably 0.04mm or more, more excellent It is selected as 0.08mm or more, additionally, it is preferred that being 0.4mm hereinafter, more preferably 0.32mm is hereinafter, additionally, it is preferred that be 0.04mm or more 0.4mm is hereinafter, more preferably 0.08mm or more 0.32mm or less.

Furthermore in the case where including translot 44b the sanitary napkin 1 such as present embodiment and constitute absorbent core, on As long as the value in the high grammes per square metre portion 46 stated and there are associated each value do not including the high grammes per square metre portion of translot 44b with low grammes per square metre portion 47 It is eligible.

Furthermore the measuring method of high grammes per square metre portion 46 and the respective grammes per square metre in low grammes per square metre portion 47 and thickness be with above-mentioned high grammes per square metre What the same mode of measuring method in portion 42 and low grammes per square metre portion 43 carried out.

In addition, the grammes per square metre in the high grammes per square metre portion 42 of middle section 41 is bigger than the high grammes per square metre portion 46 in side region 45, in addition, thickness Also bigger than the high grammes per square metre portion 46 in side region 45.Therefore, the thickness t1 of middle section 41 is thicker than the thickness t2, In in side region 45 Middle section 41 is formed with protruding portion 5 outstanding upwards than the upper surface S2 in side region 45.

The thickness t1 of middle section 41 is preferably 110% or more relative to the ratio of the thickness t2 in side region 45, more excellent It is selected as 120% or more, additionally, it is preferred that for 400% hereinafter, more preferably 300% hereinafter, additionally, it is preferred that be 110% or more 400% hereinafter, more preferably 120% or more 300% or less.In the present embodiment, the thickness t1 of middle section 41 is to be located at The thickness in the high grammes per square metre portion 42 of the width direction central portion of middle section 41, the thickness t2 in side region 45 are and center The thickness in the adjacent high grammes per square metre portion 46 in region 41.

Any one of counterpart B and rear part C in fluid drainage portion, protruding portion 5 are from the upper surface in side region 45 S2 height t outstanding is preferably 20% or more relative to the ratio of the total thickness t 1 of middle section 41, and more preferably 30% or more, Additionally, it is preferred that for 90% hereinafter, more preferably 80% hereinafter, additionally, it is preferred that be 20% or more 90% hereinafter, more preferably 30% Above 80% or less.The projecting height t of protruding portion 5 subtracts the thickness t2 in side region 45 with the total thickness t 1 from middle section 41 Resulting value is identical.

In sanitary napkin 1, in side region 45, high grammes per square metre is alternately also formed on the length direction X of absorbent core 4 Portion 46 and low grammes per square metre portion 49, each low grammes per square metre portion 49 extend along the width direction Y of absorbent core 4.As a result, in side region 45, a plurality of translot 44b is configured with relative to the compartment of terrain length direction X.The low grammes per square metre portion 48 and side region of middle section 41 Boundary portion of the 45 low grammes per square metre portion 49 in middle section 41 and side region 45, position on the length direction X of absorbent core 4 It sets unanimously, similarly, the translot 44a of middle section 41 and the translot 44b in side region 45,45 are being absorbed in the boundary portion Position consistency on the length direction X of property core 4.

That is, the translot 44a of middle section 41 and the translot 44b in side region 45,45 form the central area from absorbent core 4 Domain 41 to side region 45,45 continuous 1 translot 44, the translot 44 extend on the entire width of absorbent core 4.Moreover, The translot 44 is formed with a plurality of at spaced intervals on the length direction of absorbent core 4.In other words, the low grammes per square metre of middle section 41 The low grammes per square metre continuously extended on the entire width of the low grammes per square metre portion 49 in portion 48 and side region 45 formation absorbent core 4 Portion, the grammes per square metre of the forming material of the absorbent core in this low grammes per square metre portion, thickness and density than side region 45 high grammes per square metre portion 46 is small.

It is so-called continuously to refer to the space in the emancipated translot in upside not from middle section to side region about translot 44 It disconnects between middle section and side region, but is continuously present from middle section to side region.In present embodiment Sanitary napkin 1 in, translot 44 intersects to crosswise when looking down with cannelure 50, but across the opposite side of cannelure There are in all or part of situation in the space in another translot in the extension in the space in translot, translot will not with it is vertical The cross part of slot disconnects.

In the sanitary napkin 1 of present embodiment, the middle section 41 of absorbent core 4 and side region 45 are integrally formed, and And the height of the protruding portion 5 that there is density ratio to be located on the inside of width direction in the width direction both sides of the middle section 41 and gram The high density portion 41a higher than side region 45 again.It is high as shown in Fig. 3 (a)~Fig. 3 (c) in the sanitary napkin 1 of present embodiment Density portion 41a is when manufacturing sanitary napkin to the portion as high grammes per square metre portion 42 be formed as with the middle section 41 of absorbent core 4 The width direction both sides of the identical thickness of 42' are divided to be compressed and formed.In addition, protruding portion 5 is indulged in sanitary napkin 1 The width direction length of the bottom 50b of slot 50 is narrower than the width direction length of opening portion 50a.As shown in Fig. 2 (a), in width side Into sectional view, cannelure 50 becomes substantially V-like shape.It, can be in following sheet by the way that there is such composition in middle section 41 Characteristic effect is realized in invention.

Firstly, body fluid is discharged in fluid drainage portion counterpart B to the protruding portion 5 of middle section 41.Using in length direction X The cannelure 50 of extension, excreta become prone on length direction X spread.On the other hand, cannelure 50 becomes on width direction Y Opening portion 50a wider, bottom 50b relatively narrow shape, so enter the side wall 50c on body fluid one side and cannelure 50 of cannelure 50 Contact is flowed to the direction of bottom 50b on one side.Therefore, body fluid is just absorbed by side wall 50c before reaching bottom 50b, is existed on one side It spreads on the width direction Y of protruding portion 5, and is penetrated on one side to thickness direction.In the side of middle section 41, there are protruding portions 5 The high density portion 41a formed by compression.Therefore, the body fluid spread on width direction Y and thickness direction is led to high density Portion.The grammes per square metre of the absorbent material in high density portion is higher than side region 45, therefore keeps the ability of body fluid high.Therefore, body fluid exists The both sides of middle section 41 are intercepted, and are not easy to reach the width direction both sides of sanitary napkin 1.Therefore, in sanitary napkin 1, It is easy to inhibit the side leakage of body fluid.Furthermore in the sanitary napkin of present embodiment 1, high density portion 41a has and side region 45 The roughly the same thickness in high grammes per square metre portion 46, so the excretory portion of the width and wearer easy to set up for being both formed as making protruding portion 5 The suitable shape of phase is not easy to assign the high-selenium corn region of sense of discomfort again.However it is not limited to which this, can also make the thickness of high density portion 41a Degree is smaller than the thickness of protruding portion 5 and thicker than the high grammes per square metre portion 46 in side region 45, or with thickness from protruding portion 5 to side region 45 go to gradually become smaller so that mode identical with the height in high grammes per square metre portion 46 in side region 45, has high density portion 41a Inclination, thus, it is possible to be arranged from protruding portion 5 to the tilting zone in side region 45 to assign the flexibility of appearance.

In the present specification, so-called " integrally formed ", refer to that be different from will be using the engagement means such as bonding agent or compression The component manufactured in different step is bonded to each other, but is integrally formed in one step using identical material.Therefore, example Such as, the part 42u of the formation protruding portion 5 of middle section 41 be located at position than part 42u on the lower part 42d it Between, there is no the mutual adjacency section of layer generated when 2 absorbent cores that will be manufactured respectively are overlapped or engaging portions, in addition, In the boundary portion of middle section 41 and side region 45,45, also there is no be arranged when 2 absorbent cores that will be manufactured respectively When the mutual adjacency section of generated core or engaging portion.

When the middle section 41 for including protruding portion 5 and integrally formed a pair of of side region 45,45, the liquid of absorption has The continuity that can be moved glibly.The manufacturing method of absorbent core about such construction, is described below.

More specifically high density portion 41a is illustrated.

What the high density portion 41a of sanitary napkin 1 was formed in the manner as described below, it may be assumed that use the main portion of expression in Fig. 5 (a) The fine device of the product divided, having as shown in Fig. 3 (a) in manufacture includes becoming the part of high density portion 41a and being formed thicker After the absorbent core 4A of middle section 41, the both sides of the middle section 41 of absorbent core 4A are compressed.In sanitary napkin 1, By compressing certain part in the left and right sides portion of the protruding portion 5 of middle section 41, reduce thickness, the part is as density High density portion 41a is formed than no compressed high region of protruding portion 5.In addition, high density portion 41a is because of absorbent material Grammes per square metre is higher than side region 45, so having sufficient absorptive capacity, therefore inhibits the lateral margin of body fluid arrival absorbent core 4.Cause And it is easy to prevent body fluid from leaking from the side of sanitary napkin 1.In the sanitary napkin 1 of present embodiment, high density portion (region) 41a Thickness and side region 45 there is no the part of cannelure 52 and translot 44 is roughly the same, but it is not limited to this, can also be high The thickness in density portion is thinner than protruding portion 5, but thickness is thicker than side region 45.

In addition, in sanitary napkin 1, Fig. 2 (a) as indicated, the cannelure 50 of protruding portion 5 with from opening portion 50a to bottom 50b Width direction length is gone to become narrow gradually, in width direction sectional view, cannelure 50 becomes substantially V-like shape.Except such form with It outside, can be also stepped cross-section shape, but when for substantially V shape, since body fluid reaches bottom from the opening portion 50a of cannelure 50 Can efficiently be contacted with the wall surface of side wall 50c before 50b, and since clearance portion becomes narrow gradually, thus capillary force from The opening portion 50a of cannelure plays a role to bottom 50b, can be more quickly by inside liquid absorption to absorbent core 4, therefore is easy to Liquid is absorbed into inside absorbent core 4 from the skin abutment face side of protruding portion 5, so it is preferred that.

The width direction length La of the opening portion 50a of the cannelure 50 of protruding portion 5 is preferably 0.5mm or more, and then preferably 1mm or more, additionally, it is preferred that being 5mm hereinafter, being in turn preferably 4mm hereinafter, the width direction length Lb of bottom 50b is preferably 1mm hereinafter, be preferably 0.5mm or less in turn.The lower limit of the width direction length Lb of bottom 50b is 0 (zero).

In addition, the depth of cannelure 50 be preferably 0.5mm or more 5.0mm hereinafter, be in turn preferably 1.0mm or more 3.0mm with Under.In addition, the difference (Lb described in the La-) of the width direction length of the opening portion 50a and bottom 50b of cannelure 50 is preferably 0.5mm or more 3.0mm hereinafter, be preferably 1.0mm or more 2.0mm or less in turn.

In addition, difference (the La- institute of the depth of cannelure 50 relative to the width direction length of opening portion 50a and bottom 50b State Lb) ratio [depth/poor (Lb described in the La-)] be preferably 0.5 or more 20 hereinafter, in turn be preferably 1 or more 10 or less. If the range, then it is easy to make the dimensionally stable of the cannelure in dress, is easy to maintain preferred for absorbing excreta Shape.

In addition, position of the bottom 50b of cannelure 50 positioned at the upper surface S2 than side region 45 on the lower.It is so-called herein The position of the upper surface S2 in side region 45 is the high grammes per square metre portion 46 at the position adjacent with middle section 41 in side region 45 Upper surface.The bottom 50b of cannelure 50 is preferably on the length direction X of absorbent core 4, in the whole region of middle section 41, Positioned at the position of the upper surface S2 than side region 45 on the lower.By forming such composition, it can make liquid promptly from health The surface of towel 1 migrates to the deep inside of absorbent core 4, and makes liquid from the inside of absorbent core 4 to the lateral margin of absorbent core 4 Diffusion.Temporarily just liquid will be made in absorbent core after liquid absorption to the inside of absorbent core 4 from the surface of sanitary napkin 1 in this way 4 inside diffusion, thus can inhibit liquid in the diffusion on 1 surface of sanitary napkin, and make liquid in the back side diffusion of sanitary napkin 1.Cause This, can reduce the part wet because of liquid on 1 surface of sanitary napkin, provide comfortable dry feeling, and liquid to user It is easy to be sent to the side region 45 of absorbent core 4, and can more efficiently utilizes the absorptive capacity of absorbent core 4, so can mention Even if using also the not product of easy to leak for a long time for one kind.In addition, the diffusion because of liquid on 1 surface of sanitary napkin is inhibited, Therefore liquid becomes larger in the difference of the diffusivity at 1 back side of 1 surface of sanitary napkin and sanitary napkin, due to the difference, user can also be enabled to regard Feel that the absorbability of sanitary napkin 1 is high in feel.In this sanitary napkin 1, the grammes per square metre and thickness ratio in the low grammes per square metre portion 43 of middle section 41 The high grammes per square metre portion 46 in side region 45 is small, therefore, the length direction X of each comfortable absorbent core 4 of cannelure 50, translot 44 and width side To the whole region of the middle section 41 of Y, position of the bottom positioned at the upper surface S2 than side region 45 on the lower.

In addition, in the sanitary napkin 1 of present embodiment, a plurality of translot 44 on the width direction Y of absorbent core 4, The bottom 44d of position P1, P1 (referring to Fig. 2 (b)) adjacent with side region 45 of middle section 41 is located at than side region 45 The position on the lower upper surface S2.As shown in Fig. 2 (b), the bottom 44d of translot 44 is preferably in the width direction of absorbent core 4 On, in the whole region of middle section 41, positioned at the position of the upper surface S2 than side region 45 on the lower.In this health In towel 1, the grammes per square metre and thickness in the low grammes per square metre portion 43 of middle section 41 are smaller than the high grammes per square metre portion 46 in side region 45, therefore, cannelure 50, in the whole region of the middle section 41 on the length direction X and width direction Y of each comfortable absorbent core 4 of translot 44, bottom Position of the portion positioned at the upper surface S2 than side region 45 on the lower.

Whether the bottom of cannelure 50 and translot 44 is located at the position of the position of the upper surface S2 than side region 45 on the lower, It is by measuring the part 43 for the bottom 50b for forming cannelure 50 or forming the position adjacent with side region 45 of middle section 41 The thickness in the high grammes per square metre portion 46 of the thickness and side region 45 of the part of the bottom 44d of P1, P1 judges.Specifically, first Absorbent core 4 is taken out from sanitary napkin 1, the high grammes per square metre portion 46 in side region 45 is measured as basic point using the bottom surface of middle section 41 Thickness.The measurement of thickness proceeds as follows, it may be assumed that with the pressure of 5kPa to each position pressurization 10 minutes, in discharge The acrylic panel of size 20mm × 20mm, thickness 3mm are placed in measurement site afterwards, non-connect using what KEYENCE company manufactured Touch laser displacement gauge (laser head LK-G30, displacement meter LK-GD500) is measured.Then, it is manufactured using FEATHER company Single-blade razor, the survey of the bottom for position P1, the P1 adjacent with side region 45 for cutting out middle section 41 from absorbent commodity Determine portion, is pressurizeed 10 minutes with the pressure of 5kPa, carry out the measurement of thickness immediately after discharge.The central area of sample after discharge The acrylic panel of size 20mm × 20mm, thickness 3mm are placed in the upper of absorber 3 by domain, are manufactured using KEYENCE company non- Contact laser displacement meter (laser head LK-G30, displacement meter LK-GD500), measures the thickness of sample.In the small pieces cut out Size is smaller and is difficult to be utilized in the case that non-contacting Laser Displacement meter is measured, such as microscope can also be used (VHX-1000 of KEYENCE company manufacture), observes the section of the sample of the cutting with 20~100 times of multiplying power to carry out Measurement.If the thickness of the determination part of the bottom of position P1, P1 adjacent with side region 45 of middle section 41 is asked before being greater than The thickness in the high grammes per square metre portion 46 in side region 45 out is then judged as cannelure 50, the bottom of translot 44 is located at than side region 45 Upper surface S2 position position on the lower.

Furthermore in any one of middle section 41 and side region 45, absorbent core 4 because of the presence of translot and cannelure, Skin abutment face has concaveconvex shape, and on the other hand, non-skin abutment face side is flat.

Sanitary napkin 1 according to the present embodiment is formed with translot 44 in the middle section 41 with protruding portion 5, the translot 44 depth are deeper, and bottom 44d reaches position more deeper than the upper surface S2 in side region 45, and extends to from middle section 41 Side region 45, and the translot 44 be reduce absorbent core forming material grammes per square metre and formed, although therefore usually tool Have and be easy to interfere curved protruding portion 5, also rich in morphotropism, is not easy to produce fold in skin abutment face.Therefore, such as Fig. 4 institute Show, protruding portion 5 can be made to be bonded fluid drainage portion or the gluteal fold of wearer with the protrusion 11 being consequently formed on one side, made on one side Global shape is deformed in a manner of the body shape with wearer, relative to the concave-convex conformable excellent of body, and phase Morphotropism is excellent is followed for the movement of wearer, is also less prone to generate uncomfortable because of caused by the bending of fold or absorbent core Sense.

If the bottom 44d of translot 44 is in the whole region of the middle section 41 on the width direction Y of absorbent core 4, position In the position of the upper surface S2 than side region 45 on the lower, then such effect further increases.

Moreover, absorbent core is integrally formed, translot 44 is the grammes per square metre for the forming material for reducing absorbent core and is formed, because This successfully spreads from the liquid that protruding portion 5 absorbs in middle section 41 in a thickness direction, and liquid is easy to from translot 44 Bottom nearby to other positions spread, skin will not be back to because of pressurization by being trapped in the liquid near the bottom of translot 44 Bearing surface.Therefore, even if in the case where having supplied big quantity of fluid, liquid is also not easy to remain in skin abutment face, can obtain Comfortable wearing feeling.

From the viewpoint of more reliably playing such effect, the depth of the translot 44a (44) of middle section 41 relative to The ratio of the thickness t1 of middle section 41 is preferably 50% or more, more preferably 60% or more, additionally, it is preferred that be 95% hereinafter, More preferably 90% hereinafter, additionally, it is preferred that for 50% or more 95% hereinafter, more preferably 60% or more 90% or less.

In addition, the width W of translot 44 is preferably 0.2mm or more, more preferably 0.5mm or more, additionally, it is preferred that for 3mm with Under, more preferably 2mm is hereinafter, additionally, it is preferred that be 0.2mm or more 3mm hereinafter, more preferably 0.5mm or more 2mm or less.Such as figure Shown in 1, the width W of translot 44 is the size on the length direction X of absorbent core.

In addition, the low grammes per square metre portion 43 of density ratio in the high grammes per square metre portion 42 of middle section 41 is high in sanitary napkin 1, therefore absorb Body fluid to translot 44 is rapidly absorbed supreme grammes per square metre portion 42.Therefore, body fluid is flowed along translot 44 on one side, is being absorbed on one side It is absorbed on the length direction of property core 4, so can efficiently carry out the body fluid absorption in middle section.As a result, to liquid from The inhibition that absorbent core 4 leaks is improved.In addition, the density in high grammes per square metre portion 46 is also than low grammes per square metre portion 47 in side region 45 Height, so can get identical effect.

In middle section 41 and side region 45 are respective, the density in low grammes per square metre portion is relative to the high grammes per square metre portion being adjacent The ratio of density be preferably 5% or more, more preferably 10% or more, additionally, it is preferred that be 50% hereinafter, more preferably 40% with Under, additionally, it is preferred that for 5% or more 50% hereinafter, more preferably 10% or more, 40% or less.

In addition, being provided with from the side positive dough sheet 2a to absorbent core 4 in middle section 41 to be integrally formed in sanitary napkin 1 Mode compressed obtained by multiple compression units.Moreover, the part Chong Die with the cannelure 50 of middle section 41 in compression unit, just Dough sheet 2a is fallen into cannelure 50.Therefore, the protuberance of positive dough sheet 2a is not likely to produce in dress, it is not wrinkled.In addition, body fluid is easy to Enter in absorbent core 4 from compression unit, and is easy to prevent body fluid a problem that flowing on positive dough sheet 2a and generating side leakage.This Kind effect is particularly effective in the case where menses contour sticky body fluid.As shown in Fig. 6 (a) and Fig. 6 (b), compression unit is, for example, logical The skin abutment face crossed in absorbent core 4 stresses folded positive dough sheet 2a, and presses positive dough sheet 2a and absorbent core 4 from the side positive dough sheet 2a And formed.Pressing is, for example, shown in the symbol 61 in the pressing of protrusion 6 Fig. 6 (a) using the embossing for the circumferential surface that roller is arranged in Part and carry out.

In addition, being additionally provided with the side cannelure 52 extended in the longitudinal direction in side region 45 in sanitary napkin 1.Side The opening portion 52a positioned at skin abutment face side and the bottom 52b positioned at non-skin side of square cannelure 52 are in the direction of the width Same length." roughly the same " width for referring to the opening portion and bottom of same position in the longitudinal direction so-called herein The difference of direction length is within 5%.By such composition, sanitary napkin 1 is in dress from the compressing force of the leg of user receiving 52 Transmit evenly of cannelure in side, and side cannelure 52 is uniformly compressed, therefore can be mitigated user and be born from sanitary napkin 1 Compressing force reaction, eliminate the sense of discomfort felt in wearing sanitary napkin 1 of user.Furthermore keep side vertical when using When the opening portion 52a of slot 52 composition wider than bottom 52b, compression of the sanitary napkin 1 in dress because being born from the leg of user Power and opening portion more significantly deforms, therefore the case where deformed in a manner of being rolled to user there are the side edge part of sanitary napkin 1. There are following situations for such deformation: 1 side edge part of sanitary napkin is to the skin side warpage of user, therefore sanitary napkin 1 strongly collides Pars inguinalis, or in 1 central portion of sanitary napkin, the skin of user is generated with the surface of sanitary napkin 1 to be separated.However, by making The width direction same length of opening portion 52a and bottom 52b can reduce the risk for generating such unfavorable condition.And And additionally aid the stability of the shape of the cannelure 50 of middle section 41 of the invention.

Side cannelure 52 is preferably adjacent with high density portion.By such composition, connect with the side side of side cannelure 52 Absorbent core 4 and different from the hardness of absorbent core 4 that the center side of side cannelure 52 connects, due to the difference of the hardness, is defended Raw towel 1 is easy to be that standard shaft makes side edge part to the direction bending opposite with the skin of user with side cannelure 52, makes in dress The shape of sanitary napkin 1 is more stable, thus can reduce the sense of discomfort that user feels because wearing sanitary napkin 1, and can make health 1 central portion of towel is more close to the skin of user, to more efficiently absorb liquid.In addition, by making to be responsible for attracting and capturing The high density portion of liquid and the relatively low side cannelure 52 of density are adjacent, can play following effect, that is, liquid is prevented to be exuded to Than high density portion at side, it is fixed on liquid closer to the region of the middle section of sanitary napkin 1, prevents liquid from sanitary napkin 1 side edge part leakage.

It is preferred that the bottom 50b of the cannelure 50 of middle section 41 is located at bottom surface (the upper table of bottom 52b than side cannelure 52 Face) lean on non-skin abutment face side.By such composition, the side portion of sanitary napkin 1 first is located at bottom surface and is more abutted by non-skin The cannelure 50 of surface side is standard shaft to the direction bending opposite with the skin of user, and then the side portion of sanitary napkin 1 is with bottom surface position In the side cannelure 52 for more leaning on skin abutment face side be standard shaft, and then to the direction bending opposite with the skin of user, thus The shape of the sanitary napkin 1 in dress can be made more stable.

The absorbent core 4 of above-mentioned sanitary napkin 1 is able to use the fine device of product, after having manufactured above-mentioned absorbent core 4A, It is manufactured by implementing the processing as shown in Fig. 3 (a)~Fig. 3 (c), which includes: the fine cylinder 54 of product, is had in outer peripheral surface Have and gather with recess portion 55, and is rotated on unidirectional R；With conduit (not shown), by the forming material of absorbent core with the shape that disperses State is supplied to the outer peripheral surface of the product fibre cylinder 54.

Gather be formed at certain intervals on the circumferencial direction of the outer peripheral surface of the fine cylinder 54 of product with recess portion 55 it is multiple.Gather It is formed with the bottom surface 56 of recess portion 55 by web plate etc., and there are the multiple pores functioned as suction hole.

As shown in Fig. 5 (a), it is formed with a part of the bottom surface 56 of recess portion 55 to be formed with protruding portion 5 gathering Middle section 41 recess portion 56a.It is configured with gathering the bottom with recess portion 55 to form the low grammes per square metres such as low grammes per square metre portion 43,43 The difficult breathability feature 57 in portion.Difficult breathability feature 57 by from gather with the bottom surface of recess portion 55 it is outstanding in a manner of fix, can also be Non-breathable component, such as formed by metal or plastics.

In the same manner as the fine device of well known product with the fine cylinder of product, carried out with the bottom surface of recess portion 55 by one side from gathering Suction supplies the forming material of absorbent core into conduit on one side, and as shown in Fig. 5 (b), the forming material of absorbent core exists Gather with being piled into regulation shape in recess portion 55.By by deposit 4' from gather with recess portion 55 demoulding obtain absorbent core 4A.Absorbent core 4A can also be before being coated by clad sheet or after cladding, by pressurizeing via between a pair of rolls etc. And it is suitably compressed.As shown in Fig. 5 (b), the part 43' formed by core forming material that is deposited on difficult breathability feature 57 As low grammes per square metre portion 43 etc., the part 42' being deposited on the bottom surface for not having difficult breathability feature 57 becomes high grammes per square metre portion 42 etc.. In addition, as described above, being pressurizeed by the middle section 41 to absorbent core 4A, in the low grammes per square metre portion of the formation of middle section 41 density ratio 43 high high grammes per square metre portions 42, with formed middle section 41 part differently, by side region 45 pressurize, in side region 45 form high high grammes per square metre portion 46, the low grammes per square metre portion 47 of density ratio.In addition, the middle section 41 in absorbent core 4A forms high density The pressurization (compression) of portion 41a can also carry out before being coated by clad sheet or after cladding.Form adding for high density portion 41a Pressure (compression) both can be used to be carried out in circumferential surface with the pressurization of roller and middle section 41 of step simultaneously, can also be with side region The pressurization in domain 45 carries out simultaneously.Alternatively, it is also possible to be size appropriate by the step design that will be formed in roller circumferential surface, and in The pressurization of the pressurization and side region 45 of entreating region 41 carries out simultaneously.In turn, can also with middle section 41 pressurization and Carried out in the different step of pressurization in side region 45, can also before the pressurization of middle section 41, middle section 41 plus Press between the pressurization in side region 45, after the pressurization in side region 45, from carried out in these different steps of pressurizeing.

In the case where manufacturing the absorbent core containing water absorbent polymer, preferably in the midway of conduit, setting water imbibition is poly- Close the introduction part of object.

As positive dough sheet 2a and non-skin lateral plate 3, can be used without special restrictions in the technical field always with The identical material of material used in coming.For example, being able to use the non-woven fabrics with liquid permeability as positive dough sheet 2a or wearing Pore membrane.As non-skin lateral plate 3, can be used plastic liquid impermeability film or spunbond-melt blown-spunbond lamination without The higher water-repellancy non-woven fabrics of the water pressure resistances such as woven fabric.In addition, can be used water pressure resistance higher as three-dimensional shield formation piece 2b Water-repellancy non-woven fabrics such as spunbond-melt blown-spunbond lamination non-woven fabrics etc..

More than, it is based on the preferred embodiment of the present invention, the present invention is described, but the present invention is not restricted to institute State embodiment.

For example, can both be made only in the liquid of absorbent commodity from middle section 41 to the continuous translot 44 in side region 45 Excretory portion counterpart can also be made only in rear part.

In addition, absorbent core both can be formed only by fibrous materials such as paper pulp fibers, fibrous material and high water absorption can also be contained Both property polymer.As fibrous material, can be used without special restrictions always for sanitary napkin, panty liner or The a variety of materials of the absorber of the absorbent commodities such as disposable diaper, such as it is able to use paper pulp fiber, artificial (rayon) fibre The staple fiber etc. of the synthetic fibers such as the staple fiber of the cellulosic fibres such as dimension, cotton fiber or polyethylene.These fibers can be independent Using a kind or combine two or more use.In addition, fibrous material preferably all or part of be paper pulp fiber, in fibrous material The ratio of paper pulp fiber is preferably 50~100 mass %, more preferably 80~100 mass %, and then preferably 100 mass %. In addition, in absorbent core, it, can also be as needed with the use of deodorant or antibacterial agent etc. in addition to high water absorbency polymer.

In addition, in the above-described embodiment, the low grammes per square metre portion of the density ratio in high grammes per square metre portion is high, but can also be inhaled by omitting The pressurization steps of the property received core, and keep the density of the two identical.

In addition, in addition to make positive dough sheet 2a fall at press section 61 (compression unit) be formed in the cannelure 50 of middle section 41 with Outside, instead of it, positive dough sheet 2a can also be made to fall into the translot 44a for being formed in middle section 41 in press section.

In addition, absorbent commodity of the invention can also be panty liner (vaginal fluid shield in addition to sanitary napkin Pad), incontinence protection, other absorbent commodities such as disposable diaper.Illustrate clipped and only in said one embodiment The element for including in one embodiment can be respectively suitable for other embodiments, in addition, the element in each embodiment It being capable of the suitably phase double replacement between embodiment.

About above embodiment, the present invention discloses following absorbent commodity in turn.

A kind of absorbent commodity of 1 > of < has the absorbability of the longer shape on the front-rear direction of absorbent commodity Core,

The absorbent core has middle section and the side region positioned at the middle section two sides in the width direction, The middle section has upper surface more respective than a side region protruding portion outstanding upwards, the absorbent core it is described in It entreats region and the side region integrally formed, and has in the width direction both sides of the middle section and dash forward described in density ratio The high density portion that portion is high out and grammes per square metre is higher than the side region, is formed in the skin abutment face of the protruding portion along the suction The cannelure of the length direction of the property received core, the cannelure are the grammes per square metres for the forming material for reducing absorbent core and are formed, and in non-flesh Skin, which abuts surface side, has bottom, and the width direction length of the bottom of the cannelure is narrower than the width direction length of opening portion.

The absorbent commodity of for example described 1 > of < of 2 > of <, wherein the width direction length of the cannelure is from opening portion to bottom It goes to become narrow gradually.

The absorbent commodity of for example described 1 > of < or 2 > of < of 3 > of <, wherein forming oriented absorbent core in the protruding portion Width direction extend translot.

The absorbent commodity of for example described 3 > of < of 4 > of <, wherein the translot is in the longitudinal direction (with the absorbent core Length direction is synonymous) compartment of terrain is configured with a plurality of.

The absorbent commodity of any one of for example described 4 > of < 1 > to < of 5 > of <, wherein the cannelure is on the longitudinal direction Pass through the protruding portion.

The absorbent commodity of any one of for example described 5 > of < 1 > to < of 6 > of <, wherein in the skin of the absorbent core The positive dough sheet that surface side is configured with liquid permeability is abutted, the middle section is provided with the positive dough sheet and absorbent core one Press section made of ground is pressed, the positive dough sheet fall into the cannelure or translot in the press section.

The absorbent commodity of any one of for example described 6 > of < 1 > to < of 7 > of <, wherein in the side of the absorbent core The skin abutment face side in region is configured with the side cannelure in the length direction extension of the absorbent core, the opening of the side cannelure The width direction length in portion and the width direction same length of bottom.

The absorbent commodity of any one of for example described 7 > of < 1 > to < of 8 > of <, wherein in the side of the absorbent core The skin abutment face in region is configured with the side cannelure in the length direction extension of the absorbent core,

The high density portion connects with the side cannelure.

The absorbent commodity of any one of for example described 8 > of < 1 > to < of 9 > of <, wherein the middle section with it is described Position of the bottom of the cannelure at the position of side area adjacency positioned at the upper surface than the side region on the lower.

The absorbent commodity of any one of for example described 9 > of < 1 > to < of 10 > of <, wherein the middle section with it is described Position of the bottom of the cannelure at the position of side area adjacency positioned at the bottom surface than the side cannelure on the lower.

The absorbent commodity of any one of for example described 10 > of < 3 > to < of 11 > of <, wherein the translot is supported in non-skin Junction side has bottom, and the bottom is located at the position that non-skin abutment face side is leaned on than the upper surface in the side region.

The absorbent commodity of any one of for example described 11 > of < 1 > to < of 12 > of <, wherein the width phase of the protruding portion Ratio for the entire width of absorbent core is 20% or more 80% or less.

The absorbent commodity of any one of for example described 12 > of < 1 > to < of 13 > of <, wherein the protruding portion is formed in suction In 30% or more length of the overall length in the front-back direction of the property received article.

The absorbent commodity of any one of for example described 13 > of < 1 > to < of 14 > of <, wherein in the central area of absorbent core Domain, compared with low grammes per square metre portion, the density of absorption piece is high in high grammes per square metre portion.

The absorbent commodity of any one of for example described 14 > of < 1 > to < of 15 > of <, wherein being formed in the middle section The grammes per square metre in the low grammes per square metre portion of the bottom of the cannelure is 5% or more 80% or less relative to the ratio of the grammes per square metre in high grammes per square metre portion.

The absorbent commodity of for example described 15 > of < of 16 > of <, wherein in the middle section, the thickness in the low grammes per square metre portion The ratio of thickness relative to the high grammes per square metre portion is 5% or more 50% or less.

The absorbent commodity of any one of for example described 16 > of < 1 > to < of 17 > of <, wherein the thickness of the middle section The ratio of thickness relative to the side region is 110% or more 400% or less.

The absorbent commodity of any one of for example described 17 > of < 3 > to < of 18 > of <, wherein the translot of the middle section It is formed with the translot in side region from the middle section of absorbent core to continuous 1 translot in side region, which is absorbing Extend on the entire width of property core.

The absorbent commodity of any one of for example described 18 > of < 1 > to < of 19 > of <, wherein in the side region, in institute State between cannelure and positive dough sheet that there are gaps.

The absorbent commodity of any one of for example described 19 > of < 1 > to < of 20 > of <, wherein in the middle section, it is described Positive dough sheet falls into the translot in the press section.

The absorbent commodity of any one of for example described 20 > of < 1 > to < of 21 > of <, wherein the protruding portion is described vertical The width direction length La of the opening portion of slot is preferably 0.5mm or more, and then preferably 1mm or more, additionally, it is preferred that for 5mm with Under, and then preferably 4mm or less.

The absorbent commodity of any one of for example described 21 > of < 1 > to < of 22 > of <, wherein the protruding portion is described vertical The width direction length Lb of the bottom of slot is preferably 1mm hereinafter, being in turn preferably 0.5mm hereinafter, and lower limit is 0 (zero).

The absorbent commodity of any one of for example described 22 > of < 1 > to < of 23 > of <, wherein the protruding portion is described vertical The depth of slot is 0.5mm or more 5.0mm hereinafter, being in turn preferably 1.0mm or more 3.0mm or less.

The absorbent commodity of any one of for example described 23 > of < 1 > to < of 24 > of <, wherein the middle section is described The difference (Lb described in the La-) of the width direction length of the opening portion and bottom of cannelure is 0.5mm or more 3.0mm hereinafter, in turn Preferably 1.0mm or more 2.0mm or less.

The absorbent commodity of any one of for example described 24 > of < 1 > to < of 25 > of <, wherein the middle section is described Ratio [depth/poor (institute of the depth of cannelure relative to the difference (Lb described in the La-) of the width direction length of opening portion and bottom State Lb described in La-)] it is 0.5 or more 20 hereinafter, being in turn preferably 1 or more 10 or less.

The absorbent commodity of any one of for example described 25 > of < 1 > to < of 26 > of <, wherein the absorbent commodity is made a living Reason uses sanitary napkin.

Industrial utilizability

The body fluid absorption performance of absorbent commodity of the invention is high, can effectively inhibit the side leakage of body fluid.

Claims

1. a kind of absorbent commodity, the absorbability with shape longer than width direction on the front-rear direction of absorbent commodity Core, the absorbent commodity are characterized in that:

The absorbent core is in its width direction with middle section and positioned at the side region of the middle section two sides, the center Region has upper surface more respective than side region protruding portion outstanding upwards,

The middle section of the absorbent core and the side region are integrally formed, and the absorbent core is in the center The width direction both sides in region have the high density portion that protruding portion described in density ratio is high and grammes per square metre is higher than the side region,

It is formed with the cannelure of the length direction along the absorbent core in the skin abutment face of the protruding portion, which is to reduce The grammes per square metre of the forming material of absorbent core and formed, and non-skin abutment face side have bottom,

The width direction length of the bottom of the cannelure is narrower than the width direction length of opening portion,

The width direction length of the cannelure goes to become narrow gradually from opening portion to bottom.

2. absorbent commodity as described in claim 1, it is characterised in that:

The absorbent commodity has front part, fluid drainage portion counterpart and rear part, the protruding portion in its length direction It is formed from fluid drainage portion counterpart to a part of the rear part.

3. absorbent commodity as described in claim 1 or 2, it is characterised in that:

In the translot that the width direction that the protruding portion forms oriented absorbent core extends.

4. absorbent commodity as claimed in claim 3, it is characterised in that:

Translot compartment of terrain on the length direction of the absorbent core is configured with a plurality of.

5. absorbent commodity as described in claim 1 or 2, it is characterised in that:

The cannelure passes through the protruding portion in the length direction of the absorbent core.

6. absorbent commodity as described in claim 1 or 2, it is characterised in that:

It is configured with the positive dough sheet of liquid permeability in the skin abutment face side of the absorbent core, is provided in the middle section Press section made of the positive dough sheet and the absorbent core are integrally pressed,

In the press section part Chong Die with the cannelure for being formed in the middle section, the positive dough sheet is fallen into the press section Enter the cannelure.

7. absorbent commodity as described in claim 1 or 2, it is characterised in that:

Extend in the skin abutment face side in the side region of the absorbent core configured with the length direction in the absorbent core Side cannelure, in the longitudinal direction the width side of the width direction length and bottom of the opening portion of the side cannelure of same position It is within 5% to the difference of length.

8. absorbent commodity as described in claim 1 or 2, it is characterised in that:

Prolong in the skin abutment face side in the side region of the absorbent core configured with the length direction in the absorbent core The side cannelure stretched,

The high density portion connects with the side cannelure.

9. absorbent commodity as described in claim 1 or 2, it is characterised in that:

Position of the bottom of the cannelure of the protruding portion positioned at the upper surface than the side region on the lower.

10. absorbent commodity as described in claim 1 or 2, it is characterised in that:

Prolong in the skin abutment face side in the side region of the absorbent core configured with the length direction in the absorbent core The side cannelure stretched, position of the bottom of the cannelure positioned at the bottom surface than the side cannelure on the lower.

11. absorbent commodity as claimed in claim 3, it is characterised in that:

The translot has bottom in non-skin abutment face side, which is located at the upper surface than the side region by non-skin Abut the position of surface side.

12. absorbent commodity as described in claim 1 or 2, it is characterised in that:

The width of the protruding portion is 20% or more 80% or less relative to the ratio of the entire width of absorbent core.

13. absorbent commodity as described in claim 1 or 2, it is characterised in that:

The protruding portion is formed in 30% or more length of the overall length in the front-back direction of absorbent commodity.

14. absorbent commodity as described in claim 1 or 2, it is characterised in that:

In the middle section, it is alternately formed with high grammes per square metre portion in the width direction of the absorbent core and is formed described vertical The low grammes per square metre portion of the bottom of slot,

Compared with the low grammes per square metre portion, the density of absorption piece is high in the high grammes per square metre portion.

15. absorbent commodity as claimed in claim 14, it is characterised in that:

The grammes per square metre in the low grammes per square metre portion is 5% or more 80% or less relative to the ratio of the grammes per square metre in the high grammes per square metre portion.

16. absorbent commodity as claimed in claim 15, it is characterised in that:

In the middle section, the thickness in the low grammes per square metre portion is 5% or more relative to the ratio of the thickness in the high grammes per square metre portion 50% or less.

17. absorbent commodity as described in claim 1 or 2, it is characterised in that:

The thickness of the middle section is 110% or more 400% or less relative to the ratio of the thickness in the side region.

18. absorbent commodity as claimed in claim 3, it is characterised in that:

The middle section of the translot of the middle section and the translot in side region formation from absorbent core is continuous to side region 1 translot, which extends on the entire width of absorbent core.

19. absorbent commodity as described in claim 1 or 2, it is characterised in that:

It is configured with the positive dough sheet of liquid permeability in the skin abutment face side of the absorbent core,

In the side region, there are gaps between the side cannelure and positive dough sheet.

20. absorbent commodity as claimed in claim 3, it is characterised in that:

It is configured with the positive dough sheet of liquid permeability in the skin abutment face side of the absorbent core, is provided in the middle section Press section made of the positive dough sheet and the absorbent core are integrally extruded,

In the middle section, the positive dough sheet falls into the translot in the press section.

21. absorbent commodity as described in claim 1 or 2, it is characterised in that:

The width direction length La of the opening portion of the cannelure of the protruding portion is 0.5mm or more 5mm or less.

22. absorbent commodity as claimed in claim 21, it is characterised in that:

The width direction length Lb of the bottom of the cannelure of the protruding portion is 1mm or less and lower limit is 0.

23. absorbent commodity as claimed in claim 21, it is characterised in that:

The depth of the cannelure of the protruding portion is 0.5mm or more 5.0mm or less.

24. absorbent commodity as claimed in claim 21, it is characterised in that:

The difference of the width direction length of the opening portion and bottom of the cannelure of the middle section be 0.5mm or more 3.0mm with Under.

25. absorbent commodity as claimed in claim 24, it is characterised in that:

The depth of the cannelure of the middle section is [deep relative to the ratio of the difference of the width direction length of opening portion and bottom Degree/(La-Lb)] it is 0.5 or more 20 hereinafter, the Lb is the width direction length of the bottom of the cannelure of the protruding portion.

26. absorbent commodity as described in claim 1 or 2, it is characterised in that:

The absorbent commodity is sanitary napkin.