CN105792785A

CN105792785A - Absorbent article

Info

Publication number: CN105792785A
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: 2016-07-20
Anticipated expiration: 2034-11-20
Also published as: TWI660718B; TW201529055A; CN105792785B; JP6257297B2; WO2015087680A1; JP2015112235A

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which shows excellent liquid diffusion properties in a width direction of a protrusion part of an absorbent core, easily retains a liquid in high density parts on both sides of the protrusion part, and is excellent in absorption performance and leakage prevention performance. SOLUTION: An absorbent article is provided with an absorbent core 4 with a shape that is long in a front-back direction of the absorbent article. The absorbent core 4 has a central area 41 and lateral areas 45, 45 on both sides of the central area in the width direction, and the central area 41 has a protrusion part 5 protruding upward with respect to the respective upper surfaces of the lateral areas. The absorbent core 4 has the central area 41 and the lateral areas 45 that are integrally molded and has high density parts 41a with density that is higher than that of the protrusion part 5 and basis weight that is higher than that of the lateral areas 45 on both side parts of the central area 41. A vertical groove 50 that is formed by reducing the basis weight of a material for forming the absorbent core and has a bottom part 50b on a non-skin contact surface side is formed in a longitudinal direction on a skin contact surface of the protrusion part 5, and the bottom part 50b has a length that is shorter in a width direction than that of an opening part 50a in the vertical groove 50.

Description

Absorbent commodity

Technical field

The present invention relates to the absorbent commodities such as sanitary napkin, sanitary pad's (secretions protective pad), incontinence protection.

Background technology

At present it is known that the absorber in the absorbent commodities such as sanitary napkin, in the way of the concaveconvex shape along the skin of wearer, it is provided with protrusion, it addition, it is known that and form slotted technology at this protrusion.Such as, the central part at absorber is had to be formed about the absorber having slotted protrusion disclosed in patent documentation 1,2.

It addition, there is following technology disclosed in patent documentation 3: including being arranged on the region of the both sides in high portion in excretory portion counterpart, be configured with high-density region, thus improves the diffusion of body fluid and keep performance.

Prior art literature

Patent documentation

Patent documentation 1: Japanese Patent Laid-Open 2009-112590 publication

Patent documentation 2: Japanese Patent Laid-Open 2012-125366 publication

Patent documentation 3: Japanese Patent Laid-Open 2011-120696 publication

Summary of the invention

Absorber in patent documentation 1 has the lamination structure including the upper and lower, and there is upper strata and being formed with the middle section of protrusion, is formed with recess in whole levels.But, this recess is processed by hot pressing stricture of vagina and is formed, the near-bottom of recess is by densification, therefore liquid not easily spreads from the near-bottom of recess to other parts, anti-wet (Wetback) the absorptive capacity preventing performance and absorber effectively utilize in have room for improvement.

It addition, in patent documentation 2, disclose the absorber at the protuberance with multiple bulk and be provided with the protrusion being made up of multiple protuberances equally, and make middle high portion block absorbent portion density ratio around high.But, the density of the block absorbent portion in middle high portion is improved by compressing described block absorbent portion entirety, and the density of described block absorbent portion becomes uniform, therefore body fluid from fluid drainage portion to the diffusibility of periphery have a room for improvement, and then the anti-wet absorptive capacity preventing performance and absorber effectively utilize in have room for improvement.

Additionally, in patent documentation 3, disclose a kind of absorber, it has and is arranged in excretory portion counterpart high portion, the both sides along absorbing articles length direction of high absorber in compression, and making the density of the central part of absorbent commodity width relatively low, the density including at least one of side portion of the sidepiece in middle high portion is of a relatively high.But, because not having the pod making liquid promptly pass through, therefore the infiltration rate of liquid is slow, wearer is promptly provided dry feeling in, make liquid infiltrate into rapidly absorber internal and effectively utilize absorber absorptive capacity in, there is room for improvement.

The present invention is the absorbent commodity about a kind of absorbent core with shape longer on the fore-and-aft direction of absorbent commodity.Described absorbent core has middle section and be positioned at the region, side of these middle section both sides in the width direction, and this middle section has the protuberance highlighted upward than the respective upper surface in this region, side.It is integrally formed with region, described side that described absorbent core is described middle section, and has the width both sides compressing this middle section and density ratio is positioned at the high density portion that the described protuberance inside its width is high.Skin abutment face at described protuberance is formed with the pod of the length direction along this absorbent core, and this pod is to reduce the grammes per square metre forming material of absorbent core and formed, and has bottom in non-skin abutment face side.The width length of the width length ratio peristome of the described bottom of described pod is narrow.

Accompanying drawing explanation

Fig. 1 indicates that the axonometric chart of 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 the explanation figure of an example of the method forming the high density portion that density ratio protuberance is high and grammes per square metre is higher than side region in the both sides of middle section.

Fig. 4 indicates that the schematic diagram of the deformation state of the absorbent core under the wearing effect of the sanitary napkin of Fig. 1.

Fig. 5 (a) and Fig. 5 (b) indicates that the schematic diagram in the cross section of the circumference of the long-pending fine cylinder being preferably used in the manufacture at the absorbent core of the sanitary napkin shown in Fig. 1.

Fig. 6 (a) and Fig. 6 (b) indicates that the explanation figure of an example of the forming method of the compression unit being absorbed in pod.

Detailed description of the invention

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

Hereinafter, based on the present invention preferred embodiment, one side is with reference to accompanying drawing, and the present invention will be described for one side.

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

As it is shown in figure 1, sanitary towel 1 includes alar part 8,8 after the absorbent main body 6 of shape longer in the longitudinal direction, a pair alar part 7,7 and a pair.About absorbent commodities such as sanitary napkins, so-called " fore-and-aft direction " is the direction consistent with the fore-and-aft direction of wearer when wearing.It addition, in this manual, fore-and-aft direction is length direction, and orthogonal to that direction is called width.

Absorbent main body 6 includes front part A, fluid drainage portion counterpart B and rear portion C in its longitudinal direction, has a pair alar part 7,7 in the left and right sides of fluid drainage portion counterpart B, in the wings the left and right sides of portion C there is a pair after alar part 8,8.Fluid drainage portion counterpart B is the part that the central part of width is oppositely disposed with the fluid drainage portion (vaginal orifice) of wearer, front part A is disposed on the ratio fluid drainage portion counterpart B part by the front side (veutro) of wearer, and rear portion B is disposed on than the fluid drainage portion counterpart B part by the side, back of wearer.

Sanitary towel 1 includes: skin lateral plate 2, towards the skin abutment face of the skin side of wearer when its formation is worn；Non-skin lateral plate 3, it is formed when wearing towards the non-skin abutment face of the garment side such as medicated underpants；With absorbent core 4, it is arranged between these two sheets 2,3.Skin lateral plate 2 has the positive dough sheet 2a of liquid permeability and is bonded on a pair stereo enclosure formation sheet 2b, 2b of its both sides.The positive dough sheet 2a of liquid permeability is the central part of the width to be arranged in absorbent main body 6 in the way of the total length of absorbent main body 6.Stereo enclosure formation sheet 2b, when being overlapped on positive dough sheet 2a by the side edge part 21 of the width center side of absorbent main body, is engaging from the position in this side edge part 21 outside of width slightly partially with this positive dough sheet 2a.Stereo enclosure formation sheet 2b has the elastomeric element (not shown) that stereo enclosure is formed near described side edge part 21, when wearing, utilizing the contractility of this elastomeric element, the part of this side edge part 21 fixed width of the distance of fluid drainage portion counterpart B erects in the way of leaving from positive dough sheet 2a and forms stereo enclosure.

The stereo enclosure that after a pair alar part 7,7 and a pair, alar part 8,8 is extended by the both side edges from absorbent core 4 is formed and constitutes with sheet 2b and non-skin lateral plate 3.In a pair respective face being made up of non-skin lateral plate 3 of alar part 7, it is provided with the alar part adhesive part (not shown) of the non-skin abutment face of crotch part for being fixed on medicated underpants, in the non-skin abutment face of absorbent main body 6, it is provided with the main body adhesive part (not shown) of inner surface for this main body 6 being fixed on medicated underpants.Rear alar part 8 is arranged in when wearing on the inner surface (skin abutment face) of medicated underpants.The adhesive part of the inner surface for being fixed on medicated underpants it is also equipped with preferably in the face being made up of non-skin lateral plate 3 of rear alar part 8.The circumference place in the outer part of the ratio absorbent core 4 of skin lateral plate 2 and non-skin lateral plate 3 is bonded with each other by bonding agent, and is engaged by heat sealing at the circumference of sanitary towel 1.It is bonded with each other also by the bonding agent carrying out the pattern coatings such as point, spiral, striped between preferred skin lateral plate 2 and absorbent core 4 and between absorbent core 4 and non-skin lateral plate 3.

Absorbent core 4 in sanitary towel 1 is made up of the fiber aggregate including the fibrous materials such as paper pulp fiber or is made up of the parts maintaining high water absorbency polymer between the fiber of this fiber assembly.Absorbent core 4 is clad sheet (the omitting diagram) cladding that upper and lower two surfaces are made up of cotton paper or water penetration non-woven fabrics.Clad sheet is to form spilling and improving the conformality of absorbent core and use and be of material in order to what prevent absorbent core.

As it is shown in figure 1, the absorbent core 4 in sanitary towel 1 has shape longer on the direction identical with the fore-and-aft direction of sanitary towel 1.Additionally, as shown in Fig. 2 (a) and Fig. 2 (b), absorbent core 4 has middle section 41 at width Y and is positioned at the region, side 45,45 of its both sides, and this middle section 41 has the protuberance 5 highlighted upward than this region, side 45,45 respective upper surface S2, S2.

Owing to there is the protuberance 5 of absorbent core 4 in sanitary towel 1, and form, at the width central part of skin abutment face, the protrusion 11 that the skin side of oriented wearer is prominent under positive dough sheet 2a.

Additionally, the width W1 (with reference to Fig. 2 (a)) of protuberance 5 ratio relative to the whole width W2 of absorbent core is preferably more than 20%, it is more preferably more than 30%, additionally, it is preferably less than 80%, more preferably less than 70%, additionally, it is preferably less than more than 20% 80%, more preferably less than more than 30% 70%.

As it is shown in figure 1, the protuberance 5 of the absorbent core 4 in sanitary towel 1 has shape longer on the length direction of absorbent core with the protrusion 11 being consequently formed, form the part to rear portion C from the fluid drainage portion counterpart B of sanitary towel 1.More specifically, formed near the leading section from fluid drainage portion counterpart B in scope near the X-direction central part of rear portion C.

On protuberance 5 and the protrusion 11 fore-and-aft direction X preferably in sanitary towel 1 (absorbent commodity), form the part to rear portion C from fluid drainage portion counterpart B.Additionally, protuberance 5 and protrusion 11 are preferably formed in the length of more than the 30% of the total length of the fore-and-aft direction X of sanitary towel 1, be more preferably in the length of more than 40% of the total length being formed at sanitary towel 1, so be preferably formed in sanitary towel 1 total length more than 50% length on.About following pod 50 and high density portion 41a, also identical.

Skin abutment face at the protuberance 5 of absorbent core 4 is formed with the pod 50 of the length direction X along this absorbent core 4, and this pod 50 is to reduce the grammes per square metre forming material of absorbent core and formed, and has bottom in non-skin abutment face side.That is, pod 50 is formed not by a part for the embossing compression protuberances 5 such as processing, but arranges the low part of the grammes per square metre forming material of absorbent core in the part of protuberance 5 and formed.It addition, pod 50 has peristome 50a in the skin abutment face of absorbent core 4, there is in non-skin abutment face side bottom 50b.In the sanitary towel 1 shown in Fig. 1, the pod 50 being arranged on protuberance 5 is 1, but the bar number being arranged on the pod of protuberance is not limited to this, also can be positioned apart from a plurality of on width Y.In sanitary towel 1, pod 50 is to configure in the way of the length direction along protuberance 5 passes through protuberance 5.

It addition, the protuberance 5 at absorbent core 4 is formed with translot 44a, this translot 44a is same with pod 50 is reduce the grammes per square metre forming material of absorbent core 4 and formed, and has bottom in non-skin abutment face side.Translot 44a extends along the width Y of absorbent core 4.

In the sanitary towel 1 shown in Fig. 1, it is positioned apart from a plurality of translot 44a at protuberance 5 longitudinally X.In sanitary towel 1, translot 44a is arranged in the way of the width along protuberance traverses protuberance 5.

As shown in Fig. 2 (a), middle section 41 at absorbent core 4, alternately being formed with the low grammes per square metre portion 43 of the bottom of high grammes per square metre portion 42 and formation pod 50 on the width Y of absorbent core 4, low grammes per square metre portion 43 extends along the length direction X of absorbent core 4.High grammes per square metre portion 42 is the part of a relatively high compared with low grammes per square metre portion 43 of grammes per square metre forming material of absorbent core, and low grammes per square metre portion 43 is the grammes per square metre part that grammes per square metre is relatively low compared with high grammes per square metre portion 42 forming material of absorbent core.

Middle section 41 at absorbent core 4, the grammes per square metre in the low grammes per square metre portion 43 forming the bottom of pod 50 is preferably more than 5% relative to the ratio of the grammes per square metre in high grammes per square metre portion 42, it is more preferably more than 10%, additionally, it is preferably less than 50%, more preferably less than 40%, additionally, it is preferably less than more than 5% 80%, more preferably less than more than 10% 70%.It addition, the grammes per square metre in high grammes per square metre portion 42 is preferably 200g/m²Above, more preferably 300g/m²Above, additionally, it is preferred that be 800g/m²Below, more preferably 700g/m²Hereinafter, additionally, it is preferred that be 200g/m²Above 800g/m²Below, more preferably 300g/m²Above 700g/m²Below.The grammes per square metre in low grammes per square metre portion 43 is preferably 10g/m²Above, more preferably 15g/m²Above, additionally, it is preferred that be 400g/m²Below, more preferably 350g/m²Hereinafter, additionally, it is preferred that be 10g/m²Above 400g/m²Below, more preferably 25g/m²Above 300g/m²Below.

At the middle section 41 of absorbent core 4, high grammes per square metre portion 42 not only grammes per square metre is bigger than the low grammes per square metre portion 43 of the bottom forming pod 50, and thickness is also big than this low grammes per square metre portion 43.The thickness in low grammes per square metre portion 43 is preferably more than 5% relative to the ratio of the thickness in high grammes per square metre portion 42, more preferably more than 10%, additionally, it is preferably less than 50%, more preferably less than 40%, additionally, it is preferably less than more than 5% 50%, more preferably less than more than 10% 40%.It addition, the thickness in high grammes per square metre portion 42 is preferably more than 1.5mm, more preferably more than 2mm, additionally, it is preferred that be below 10mm, more preferably below 8mm, additionally, it is preferred that be more than 1.5mm below 10mm, more preferably more than 2mm below 8mm.The thickness in low grammes per square metre portion 43 is preferably more than 0.08mm, more preferably more than 0.15mm, additionally, it is preferred that be below 5mm, more preferably below 4mm, additionally, it is preferred that be more than 0.08mm below 5mm, more preferably more than 0.15mm below 4mm.

Furthermore, when including translot 44a as the sanitary towel 1 of present embodiment and constitute absorbent core, the value in described high grammes per square metre portion 42 and each value associated with low grammes per square metre portion 43, if eligible in the high grammes per square metre portion not including this translot 44a.

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

Use the single-blade razor that FEATHER company manufactures, along the boundary line in high grammes per square metre portion 42 with low grammes per square metre portion 43, absorbent core is cut off, in the way of becoming area set in advance, obtains high grammes per square metre portion 42 and the small pieces in low grammes per square metre portion 43.The part clipped by low a pair grammes per square metre portion 43,43 is cut into pieces and is obtained by high grammes per square metre portion 42.That is, high grammes per square metre portion 42 cuts out as the fritter sheet divided by low grammes per square metre portion 43.When these small pieces include the low grammes per square metre portion 48 being formed along the bottom of the translot 44a that width extends, the boundary line in high grammes per square metre portion 42 with low grammes per square metre portion 43 and low grammes per square metre portion 48 the high grammes per square metre portion 42 divided is cut out as sample slice and is used for measuring.The small pieces in low grammes per square metre portion 43 are the narrow part being sandwiched between high a pair grammes per square metre portion 42,42 to be cut into pieces in the way of length becomes 30mm.

Electronic balance (the electronic balance GR-300 that A&D company manufactures, precision: arithmetic point 4 later) is used to measure the weight of these small pieces.By the calculated weight area divided by high grammes per square metre portion 42 or the small pieces in low grammes per square metre portion 43, calculate the grammes per square metre of small pieces.About each high grammes per square metre portion 42 and low grammes per square metre portion 43, using the meansigma methods of the grammes per square metre of 5 small pieces as grammes per square metre.

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

Measuring by measuring in order to the thickness of the small pieces that each Site Determination grammes per square metre cuts out is carried out of the thickness in high grammes per square metre portion 42 and low grammes per square metre portion 43.Pressurize 10 minutes with the determination part of the pressure of the 5kPa high grammes per square metre portion 42 to cutting out from absorbent commodity and the small pieces in low grammes per square metre portion 43, be measured immediately after release of pressure.The middle section of the sample after release of pressure, the acrylic panel of size 20mm × 20mm, thickness 3mm is placed on absorber 3, use the non-contacting Laser Displacement meter (laser head LK-G30, displacement meter LK-GD500) that KEYENCE company manufactures, measure the thickness of sample.When the size of the small pieces cut out less and be difficult by non-contacting Laser Displacement meter be measured, such as it is used as microscope (VHX-1000 that KEYENCE company manufactures), observe the cross section of described cut off sample with the multiplying powers of 20～100 times, be measured.

At the middle section 41 of absorbent core 4, high grammes per square metre portion 42 is compared with the low grammes per square metre portion 43 of the bottom forming pod 50, and the density of absorption piece uprises.This kind of composition such as obtains by the middle section 41 of absorbent core 4 being pressurizeed in the step manufacturing absorbent core 4.Now, the pressure of pressurization concentrates on the high grammes per square metre portion 42 that thickness is thicker, and pressure is not born in the low grammes per square metre portion 43 of thinner thickness because of pressurization, will not be compressed.So, it is designed by and only compresses high grammes per square metre portion 42 and make high grammes per square metre portion 42 density of absorption piece for low grammes per square metre portion 43 uprise.It addition, at the middle section 41 of absorbent core 4, the length direction X of absorbent core 4 is alternately formed with the low grammes per square metre portion 48 of the bottom of high grammes per square metre portion 42 and formation translot 44a.High grammes per square metre portion 42 is compared with the low grammes per square metre portion 48 of the bottom forming translot 44a, and the density of absorption piece also uprises.Furthermore, density can by using the grammes per square metre obtained based on above-mentioned assay method and thickness to calculate.

On the other hand, in the region, side 45 of absorbent core 4, high grammes per square metre portion 46 is compared with the low grammes per square metre portion 47 of the bottom forming side pod 52, and the density of absorption piece also uprises.This kind is configured to obtain as follows.The region, side 45 of absorbent core 4 is pressurized in the step different from the step that middle section 41 is pressurizeed.The pressure applied by pressurizeing concentrates on the high grammes per square metre portion 46 that thickness is thicker, and pressure is not born in the low grammes per square metre portion 47 of thinner thickness because of pressurization, will not be compressed.So, it is designed by and only compresses high grammes per square metre portion 46 and make high grammes per square metre portion 46 density of absorption piece for low grammes per square metre portion 47 uprise.Furthermore, the pressurization steps utilized in this step is to manage to adopt to use dig the pressure roller being carved into the shape being equivalent to middle section 41 or only there is the measure such as roller of press section in the part in the region, side 45 being equivalent to absorbent core 4, only to be pressurizeed in the region, side of absorbent core 4.

And, by forming the high grammes per square metre portion 42 and low grammes per square metre portion 43 that there is grammes per square metre difference and density contrast in the above described manner, and the skin abutment face of the middle section 41 at absorbent core 4, it is formed with pod 50 that extend on the width Y of absorbent core 4 respectively, to non-skin abutment face side depression.In this manual, the skin abutment face of absorbent commodity or its component parts is the non-skin abutment face when wearing towards the face of the skin side of wearer, absorbent commodity or its component parts of absorbent commodity or its component parts be absorbent commodity or its component parts when wearing towards the face of the opposition side of the skin side of wearer.

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

And, by being formed with the high grammes per square metre portion 46 and low grammes per square metre portion 47 that there is grammes per square metre difference and density contrast in the above described manner, and the skin abutment face in the region, side 45 at absorbent core 4, it is also formed with a plurality of side pod 52 that extend on the length direction X of absorbent core 4 respectively, that cave in non-skin abutment face side.

Region, side 45 at absorbent core 4, the grammes per square metre in the low grammes per square metre portion 47 forming the bottom of side pod 52 is preferably more than 5% relative to the ratio of the grammes per square metre in high grammes per square metre portion 46, it is more preferably more than 10%, additionally, it is preferably less than 50%, more preferably less than 40%, additionally, it is preferably less than more than 5% 50%, more preferably less than more than 10% 40%.It addition, the grammes per square metre in high grammes per square metre portion 46 is preferably 50g/m²Above, more preferably 100g/m²Above, additionally, it is preferred that be 400g/m²Below, more preferably 300g/m²Hereinafter, additionally, it is preferred that be 50g/m²Above 400g/m²Below, more preferably 100g/m²Above 300g/m²Below.The grammes per square metre in low grammes per square metre portion 47 is preferably 2.5g/m²Above, more preferably 5g/m²Above, additionally, it is preferred that be 200g/m²Below, more preferably 150g/m²Hereinafter, additionally, it is preferred that be 2.5g/m²Above 200g/m²Below, more preferably 5g/m²Above 150g/m²Below.

In the region, side 45 of absorbent core 4, high grammes per square metre portion 46 not only grammes per square metre is bigger than the low grammes per square metre portion 47 of the bottom forming side pod 52, and thickness is also big than this low grammes per square metre portion 47.The thickness in low grammes per square metre portion 47 is preferably more than 5% relative to the ratio of the thickness in high grammes per square metre portion 46, more preferably more than 10%, additionally, it is preferably less than 50%, more preferably less than 40%, additionally, it is preferably less than more than 5% 50%, more preferably less than more than 10% 40%.It addition, the thickness in high grammes per square metre portion 46 is preferably more than 0.8mm, more preferably more than 1mm, additionally, it is preferred that be below 5mm, more preferably below 4mm, additionally, it is preferred that be more than 0.8mm below 5mm, more preferably more than 1mm below 4mm.The thickness in low grammes per square metre portion 47 is preferably more than 0.04mm, more preferably more than 0.08mm, additionally, it is preferred that be below 0.4mm, more preferably below 0.32mm, additionally, it is preferred that be more than 0.04mm below 0.4mm, more preferably more than 0.08mm below 0.32mm.

Furthermore, when including translot 44b as the sanitary towel 1 of present embodiment and constitute absorbent core, if the value in above-mentioned high grammes per square metre portion 46 and to there is, with low grammes per square metre portion 47, each value of associating eligible in the high grammes per square metre portion not including this translot 44b.

Furthermore, high grammes per square metre portion 46 is carry out in the way of same with the assay method in above-mentioned high grammes per square metre portion 42 and low grammes per square metre portion 43 with the assay method of the respective grammes per square metre in low grammes per square metre portion 47 Yu thickness.

It 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, it addition, thickness is also big 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 region, side 45, is formed than the upper surface S2 in side region 45 protuberance 5 highlighted upward at middle section 41.

The thickness t1 of middle section 41 ratio relative to the thickness t2 in region, side 45 is preferably more than 110%, more preferably more than 120%, additionally, it is preferably less than 400%, more preferably less than 300%, additionally, it is preferably less than more than 110% 400%, more preferably less than more than 120% 300%.In the present embodiment, the thickness t1 of middle section 41 is in the described thickness in the high grammes per square metre portion 42 of the width central part of middle section 41, and the thickness t2 in region, side 45 is the described thickness in the high grammes per square metre portion 46 adjacent with middle section 41.

In any one of fluid drainage portion counterpart B and rear portion C, protuberance 5 is all be preferably more than 20% from the height t that the upper surface S2 in region, side 45 is prominent relative to the ratio of the total thickness t 1 of middle section 41, it is more preferably more than 30%, additionally, it is preferably less than 90%, more preferably less than 80%, additionally, it is preferably less than more than 20% 90%, more preferably less than more than 30% 80%.The value of the thickness t2 gained that the projecting height t of protuberance 5 deducts region, side 45 with the total thickness t 1 from middle section 41 is identical.

In sanitary towel 1, in region, side 45, being also alternately formed with high grammes per square metre portion 46 and low grammes per square metre portion 49 on the length direction X of absorbent core 4, each low grammes per square metre portion 49 extends along the width Y of absorbent core 4.Thus, in region, side 45, it is configured with a plurality of translot 44b relative to length direction X compartment of terrain.The low grammes per square metre portion 48 of middle section 41 and the low grammes per square metre portion 49 in region, side 45 boundary portion at middle section 41 with region, side 45, position consistency on the length direction X of absorbent core 4, similarly, the translot 44b in the translot 44a of middle section 41 and region, side 45,45 is in described boundary portion, the position consistency on the length direction X of absorbent core 4.

That is, the translot 44a of middle section 41 forms region, middle section 41 to side 45,45 1 translot 44 of continuous print from absorbent core 4 with the translot 44b in region, side 45,45, and this translot 44 extends on the whole width of absorbent core 4.And, this translot 44 is formed a plurality of at spaced intervals on the length direction of absorbent core 4.In other words, the low grammes per square metre portion 43 of middle section 41 forms one extended continuously on the whole width of absorbent core 4 low grammes per square metre portion with the low grammes per square metre portion 47 in region, side 45, and the high grammes per square metre portion 46 forming the grammes per square metre of material, thickness and region, density ratio side 45 of the absorbent core in this low grammes per square metre portion is little.

About translot 44, the so-called space referred to continuously in the emancipated translot in upside from middle section to region, side does not disconnect between middle section and region, side, but is continuously present from middle section to region, side.In the sanitary towel 1 of present embodiment, translot 44 intersects when overlooking with pod 50 crosswise, but under there is all or part of situation in the space in another translot in the prolongation in the space in the translot of the side relative across pod, translot will not disconnect at the cross part with pod.

In the sanitary towel 1 of present embodiment, the middle section 41 of absorbent core 4 is integrally formed with region, side 45, and has density ratio in the width both sides of this middle section 41 and be positioned at the high density portion 41a that the described protuberance 5 inside width is high and grammes per square metre is higher than side region 45.In the sanitary towel 1 of present embodiment, as shown in Fig. 3 (a)～Fig. 3 (c), the width both sides of the thickness identical for part 42' becoming high grammes per square metre portion 42 of the middle section 41 be formed as with absorbent core 4 are compressed when manufacturing sanitary towel and are formed by high density portion 41a.It addition, in sanitary towel 1, the width length of the width length ratio peristome 50a of the bottom 50b of the pod 50 of protuberance 5 is narrow.As shown in Fig. 2 (a), in width sectional view, pod 50 becomes substantially V-like shape.Constitute by there is this kind at middle section 41, it is possible in the following present invention, realize distinctive effect.

First, body fluid is discharged to the protuberance 5 of middle section 41 at fluid drainage portion counterpart B.Utilizing the longitudinally X pod 50 extended, Excreta becomes prone to that longitudinally X is upper to spread.On the other hand, pod 50 becomes the shape that peristome 50a is wider, bottom 50b is narrower on width Y, so the sidewall 50c of the body fluid and pod 50 entering pod 50 contacts, while flowing to the direction of bottom 50b.Therefore, body fluid was just absorbed by sidewall 50c before arriving bottom 50b, spread on the width Y of protuberance 5, and while penetrated into thickness direction.At the sidepiece of middle section 41, there is the high density portion 41a that protuberance 5 is compressed and formed.Therefore, on width Y and thickness direction, the body fluid of diffusion is drawn towards high density portion.The grammes per square metre of the absorbent material in high density portion is higher than side region 45, and the ability therefore keeping body fluid is high.Therefore, body fluid is intercepted in the both sides of middle section 41, and not easily arrives the width both sides of sanitary towel 1.Therefore, in sanitary towel 1, it is easy to suppress the side leakage of body fluid.Furthermore, in the sanitary towel 1 of present embodiment, high density portion 41a has the thickness roughly the same with the high grammes per square metre portion 46 in region, side 45, so easy to set up be not only formed as making the width of protuberance 5 fit mutually with the excretory portion of wearer shape, but also not easily give the high-selenium corn region of sense of discomfort.But, it is not limited to this, the thickness that also can make high density portion 41a is less than the thickness of protuberance 5 and thicker than the high grammes per square metre portion 46 in side region 45, or go to taper into so that in the way of identical with the height in the high grammes per square metre portion 46 in region, side 45 from protuberance 5 to region, side 45 by thickness, make high density portion 41a have inclination, it is possible to arrange the flexibility giving outward appearance from the tilting zone in region, protuberance 5 to side 45.

In this manual, so-called " integrally formed ", refer to be different from and utilize the engagement means such as bonding agent or compression to be bonded to each other by the parts manufactured in different step, but use identical material to form in one step.Therefore, such as, at the part 42u forming protuberance 5 of middle section 41 and between the part 42d than this part 42u position on the lower, it is absent from when 2 the absorbent core overlaps that will manufacture respectively produced layer adjacency section each other or joint portion, additionally, in the boundary portion of middle section 41 with region, side 45,45, also it is absent from when being arranged by manufacture respectively 2 absorbent cores produced core adjacency section each other or joint portion.

When the middle section 41 and region, a pair side 45,45 that include protuberance 5 are integrally formed, the liquid of absorption has the seriality that can move glibly.About the manufacture method of the absorbent core of this kind of structure, described below.

More specifically high density portion 41a is illustrated.

The high density portion 41a of sanitary towel 1 is formed in the manner as described below, that is: the long-pending fine device representing major part is used in Fig. 5 (a), after the absorbent core 4A of the middle section 41 manufacturing part that having as shown in Fig. 3 (a) include becoming high density portion 41a and formed thicker, compress the both sides of the middle section 41 of this absorbent core 4A.In sanitary towel 1, by compressing certain part in the left and right sides portion of the protuberance 5 of middle section 51, make thickness reduce, be somebody's turn to do the high region of the protuberance 5 not compressed partly as density ratio and form high density portion 41a.It addition, high density portion 41a is higher than side region 45 because of the grammes per square metre of absorbent material, so having sufficient absorptive capacity, body fluid is therefore suppressed to arrive the lateral margin of absorbent core 4.It is therefore easy to prevent the body fluid sidepiece seepage from sanitary towel 1.In the sanitary towel 1 of present embodiment, the thickness of high density portion (region) 41a is roughly the same with the part being absent from pod 50 and translot 44 in region, side 45, but it is not limited to this, it is also possible to the thickness in high density portion is thinner than protuberance 5, but thickness is thicker than side region 45.

It addition, in sanitary towel 1, Fig. 2 (a) is as indicated, the pod 50 of protuberance 5 is along with going width length to become narrow gradually from peristome 50a to bottom 50b, and in width sectional view, pod 50 becomes substantially V-like shape.Except this kind of form, it can be also stepped cross-section shape, but when for substantially V shape, owing to body fluid can contact with the wall of sidewall 50c efficiently before the peristome 50a arrival bottom 50b of pod 50, and owing to clearance portion becomes narrow gradually, so capillary force plays a role from the peristome 50a of pod to bottom 50b, can more quickly liquid be absorbed to absorbent core 4 internal, it is thus susceptible to absorb to absorbent core 4 internal from the skin abutment face side of protuberance 5 by liquid, so preferably.

The width length La of the peristome 50a of the pod 50 of protuberance 5 is preferably more than 0.5mm, and then is preferably more than 1mm, additionally, it is preferably below 5mm, and then the width length Lb being preferably below 4mm, bottom 50b is preferably below 1mm, and then it is preferably below 0.5mm.The lower limit of the width length Lb of bottom 50b is 0 (zero).

It addition, the degree of depth of pod 50 is preferably more than 0.5mm below 5.0mm, and then it is preferably more than 1.0mm below 3.0mm.It addition, the difference (described in described La-Lb) of the width length of the peristome 50a and bottom 50b of pod 50 is preferably more than 0.5mm below 3.0mm, and then it is preferably more than 1.0mm below 2.0mm.

Additionally, the degree of depth of pod 50 ratio [degree of depth/poor (described in described La-Lb)] relative to peristome 50a with the difference (described in described La-Lb) of the width length of bottom 50b is preferably less than more than 0.5 20, and then is preferably less than more than 1 10.If this scope, then it is prone to make the dimensionally stable of the pod in dress, it is easy to maintain preferred shape for absorbing and excreting thing.

It addition, the bottom 50b of pod 50 is positioned at the upper surface S2 position on the lower than side region 45.The position of the upper surface S2 in region, so-called side 45 is the upper surface in the high grammes per square metre portion 46 at the position adjacent with middle section 41 in region, side 45 herein.The bottom 50b of pod 50 is preferably on the length direction X of absorbent core 4, in the whole region of middle section 41, is positioned at the upper surface S2 position on the lower than side region 45.Constitute by forming this kind, liquid can be made from the surface of sanitary towel 1 promptly to travel to the deep inside of absorbent core 4, and make liquid spread to the lateral margin of absorbent core 4 from the inside of absorbent core 4.Just make liquid in the diffusion inside of absorbent core 4 after the so temporary transient inside from the surface of sanitary towel 1 by liquid absorption to absorbent core 4, liquid thus can be suppressed in the diffusion on sanitary towel 1 surface, and make liquid in the back side diffusion of sanitary towel 1.Therefore, the part moistening because of liquid on sanitary towel 1 surface can be reduced, comfortable dry feeling is provided to user, and liquid is prone to be sent to the region, side 45 of absorbent core 4, and can more efficiently utilize the absorptive capacity of absorbent core 4, even if so can provide a kind of long-time to use the product being not easy to seepage.It addition, because liquid is inhibited in the diffusion on sanitary towel 1 surface, therefore liquid becomes big on sanitary towel 1 surface with the difference of the diffusibility at sanitary towel 1 back side, due to this difference, it is possible to the absorbability of sanitary towel 1 is high to make user visually feel.In this sanitary towel 1, grammes per square metre and the thickness in the low grammes per square metre portion 43 of middle section 41 are less than the high grammes per square metre portion 46 in side region 45, therefore, the whole region of the middle section 41 of the length direction X and width Y of each comfortable absorbent core 4 of pod 50, translot 44, bottom is positioned at the upper surface S2 position on the lower than side region 45.

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

Whether the bottom of pod 50 and translot 44 is positioned at the position on the lower, position of the upper surface S2 than side region 45, is by measuring the part 43 of the bottom 50b forming pod 50 or forming the thickness in the thickness of part of bottom 44d of position P1, P1 adjacent with region, side 45 of middle section 41 and the high grammes per square metre portion 46 in region, side 45 and judge.Specifically, first take out absorbent core 4 from sanitary towel 1, measure the thickness in the high grammes per square metre portion 46 in region, side 45 with the bottom surface of middle section 41 for basic point.The mensuration of thickness carries out as follows, that is: with the pressure of 5kPa to each position pressurization 10 minutes, after release of pressure, the acrylic panel of size 20mm × 20mm, thickness 3mm is placed in measurement site, the non-contacting Laser Displacement meter (laser head LK-G30, displacement meter LK-GD500) that KEYENCE company manufactures is used to be measured.Then, use the single-blade razor that FEATHER company manufactures, cut out the determination part of the bottom of position P1, P1 adjacent with region, side 45 of middle section 41 from absorbent commodity, pressurize 10 minutes with the pressure of 5kPa, after release of pressure, carry out the mensuration of thickness immediately.The middle section of the sample after release of pressure, the acrylic panel of size 20mm × 20mm, thickness 3mm is placed in the upper of absorber 3, use the non-contacting Laser Displacement meter (laser head LK-G30, displacement meter LK-GD500) that KEYENCE company manufactures, measure the thickness of sample.When the size of the small pieces cut out less and be difficult by non-contacting Laser Displacement meter be measured, such as it is used as microscope (VHX-1000 that KEYENCE company manufactures), is measured with the cross section of the sample of the multiplying powers described cut-out of observation of 20～100 times.If the thickness of the determination part of the bottom of position P1, P1 adjacent with region, side 45 of middle section 41 more than the thickness in the high grammes per square metre portion 46 in the region, side 45 obtained before, is then judged as pod 50, the bottom of translot 44 is positioned at the position on the lower, position of the upper surface S2 than side region 45.

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

Sanitary towel 1 according to present embodiment, there is the middle section 41 of protuberance 5, it is formed with translot 44, this translot 44 degree of depth is relatively deep, and bottom 44d arrives position more deeper of than the upper surface S2 in side region 45, and extends to region, side 45 from middle section 41, and this translot 44 is to reduce the grammes per square metre forming material of absorbent core and formed, although therefore generally having the protuberance 5 being prone to hinder bending, being also rich in morphotropism, being not easy to produce fold in skin abutment face.Therefore, as shown in Figure 4, can while making protuberance 5 and the protrusion 11 that is consequently formed fit the fluid drainage portion of wearer or gluteal fold, while making global shape deform in the way of along with the body shape of wearer, concavo-convex conformable excellence relative to health, and relative to wearer action follow morphotropism excellence, be also less prone to and produce the sense of discomfort that causes because of the bending of fold or absorbent core.

If on the whole region of the middle section 41 that the bottom 44d of translot 44 is on the width Y of absorbent core 4, be positioned at the upper surface S2 position on the lower than side region 45, then this kind of effect improves further.

And, absorbent core is integrally formed, translot 44 is to reduce the grammes per square metre forming material of absorbent core and formed, therefore the liquid absorbed from protuberance 5 successfully spreads in a thickness direction at middle section 41, and the near-bottom that liquid is prone to from translot 44 spreads to other positions, it is trapped in the liquid of near-bottom of translot 44 without being back to skin abutment face because of pressurization.Therefore, even if when for when giving a large amount of liquid, liquid is not easy to remain in skin abutment face, it is possible to obtain comfortable wearing feeling.

From the view point of play this kind of effect more reliably, the degree of depth of the translot 44a (44) of middle section 41 ratio relative to the thickness t1 of middle section 41 is preferably more than 50%, it is more preferably more than 60%, additionally, it is preferably less than 95%, more preferably less than 90%, additionally, it is preferably less than more than 50% 95%, more preferably less than more than 60% 90%.

It addition, the width W of translot 44 is preferably more than 0.2mm, more preferably more than 0.5mm, additionally, it is preferred that be below 3mm, more preferably below 2mm, additionally, it is preferred that be more than 0.2mm below 3mm, more preferably more than 0.5mm below 2mm.As it is shown in figure 1, the size on the length direction X that width W is absorbent core of translot 44.

It addition, in sanitary towel 1, 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, and the body fluid therefore absorbed to translot 44 is rapidly absorbed paramount grammes per square metre portion 42.Therefore, body fluid flows along translot 44, while being absorbed on the length direction of absorbent core 4, so the body fluid absorption at middle section can be carried out efficiently.As a result, liquid is improved from the suppression of absorbent core 4 seepage.Additionally, in region, side 45, the density in high grammes per square metre portion 46 is also high than low grammes per square metre portion 47, so identical effect can be obtained.

In middle section 41 and region, side 45 are respective, the density in low grammes per square metre portion is preferably more than 5% relative to the ratio of the density in the high grammes per square metre portion being adjacent, it is more preferably more than 10%, additionally, it is preferably less than 50%, more preferably less than 40%, additionally, it is preferably less than more than 5% 50%, more preferably more than 10%, less than 40%.

It addition, in sanitary towel 1, be provided with the multiple compression units being compressed in the way of being integrally forming and obtain from the lateral absorbent core 4 of positive dough sheet 2a at middle section 41.And, in the part that compression unit is overlapping with the pod 50 of middle section 41, positive dough sheet 2a is absorbed in pod 50.Therefore, dress is not likely to produce the protuberance of positive dough sheet 2a, does not crease easily.It addition, body fluid is prone to enter in absorbent core 4 from compression unit, and it is prone to prevent body fluid from flowing on positive dough sheet 2a and producing the unfavorable conditions such as side leakage.This kind of effect is particularly effective when the contour viscosity body fluid of menses.As shown in Fig. 6 (a) and Fig. 6 (b), compression unit is such as by stressing folded positive dough sheet 2a in the skin abutment face of absorbent core 4, and presses positive dough sheet 2a and absorbent core 4 from positive dough sheet 2a side and formed.Pressing is such as the part shown in symbol 61 utilizing the protuberance 6 of embossing of the side face being arranged on roller to press in Fig. 6 (a) and carries out.

It addition, in sanitary towel 1, be additionally provided with the side pod 52 extended in the longitudinal direction in region, side 45.The peristome 52a being positioned at skin abutment face side of side pod 52 and be positioned at the bottom 52b of non-skin side same length in the direction of the width.So-called " roughly the same " difference referring to the peristome of same position in the longitudinal direction and the width length of bottom is within 5% herein.Constituted by this kind, the compression stress that sanitary towel 1 bears from the leg of user in dress is at side pod 52 Transmit evenly, and side pod 52 is uniformly compressed, therefore can relax the retroaction of the compression stress that user bears from sanitary towel 1, eliminate the sense of discomfort that user is felt in wearing sanitary towel 1.Furthermore, when adopting wider than bottom 52b for the peristome 52a composition making side pod 52, sanitary towel 1 in dress because of the compression stress born from the leg of user and peristome deforms more significantly, therefore there is the situation that the side edge part of sanitary towel 1 deforms in the way of rolling to user.There is following situation in this kind of deformation: sanitary towel 1 side edge part is to the skin side warpage of user, and therefore pars inguinalis strongly collides in sanitary towel 1, or at sanitary towel 1 central part, the skin of user produces to separate with the surface of sanitary towel 1.But, by making the width same length of peristome 52a and bottom 52b, it is possible to reduce the danger producing this kind of unfavorable condition.And, additionally aid the stability of the shape of the pod 50 of the middle section 41 of the present invention.

Side pod 52 preferably adjoins with high density portion.Constituted by this kind, from the absorbent core 4 that the side, side of side pod 52 connects and different with the hardness of the absorbent core 4 that the center side of side pod 52 connects, difference due to this hardness, sanitary towel 1 is prone to make side edge part to the skin opposite direction bending with user with side pod 52 for standard shaft, the shape making sanitary towel 1 in dress is more stable, thus can alleviate the sense of discomfort that user is felt because wearing sanitary towel 1, and the skin that can make sanitary towel 1 central part and user is more close to, thus more efficiently absorbing liquid.Additionally, adjoined by the side pod 52 making the high density portion being responsible for attracting and catch liquid relatively low with density, following effect can be played, namely, liquid is prevented to be exuded to than high density portion by side place, liquid is made to be fixed on the region of the middle section closer to sanitary towel 1, it is prevented that liquid is from the side edge part seepage of sanitary towel 1.

The bottom 50b of the pod 50 of preferred middle section 41 is positioned at than the bottom surface of side pod 52 (upper surface of bottom 52b) by non-skin abutment face side.Constituted by this kind, first the side portion of sanitary towel 1 be positioned at bottom surface more by the pod 50 of non-skin abutment face side for standard shaft to the skin opposite direction bending with user, then the side portion of sanitary towel 1 is positioned at the side pod 52 more leaning on skin abutment face side with bottom surface is standard shaft, and then to the skin opposite direction bending with user, thus the shape of sanitary towel 1 in dress can be made more stable.

The absorbent core 4 of above-mentioned sanitary towel 1 can use long-pending fine device, after having manufactured above-mentioned absorbent core 4A, manufactured by the processing implemented as shown in Fig. 3 (a)～Fig. 3 (c), this long-pending fine device includes: long-pending fine cylinder 54, it has to gather at outer peripheral face uses recess 55, and rotates on unidirectional R；With conduit (not shown), the material that formed of absorbent core is supplied the outer peripheral face to this long-pending fine cylinder 54 with state of dispersing by it.

Gather and be formed multiple on the circumferencial direction of the outer peripheral face of long-pending fine cylinder 54 at certain intervals with recess 55.Gather and formed by web plate etc. with the bottom surface 56 of recess 55, and there are the multiple pores as suction socket function.

As shown in Fig. 5 (a), gathering the recess 56a being formed with to be formed the middle section 41 with protuberance 5 by a part for the bottom surface 56 of recess 55.Gathering the difficult breathability feature 57 being configured with to be formed the low grammes per square metre portions such as low grammes per square metre portion 43,43 with the bottom of recess 55.Difficult breathability feature 57 by from gather with the bottom surface of recess 55 prominent in the way of fix, it is possible to for non-breathable parts, for instance formed by metal or plastics.

In the same manner as there is the known long-pending fine device of long-pending fine cylinder, by while aspirating from gathering with the bottom surface of recess 55, the formation material of supply absorbent core in conductive pipe on one side, and as shown in Fig. 5 (b), the formation material of absorbent core is piled into regulation shape gathering in recess 55.By this deposit 4' is obtained absorbent core 4A with recess 55 demoulding from gathering.Absorbent core 4A can also before being coated with by clad sheet or after cladding, by being suitably compressed via carrying out pressurizeing between pair of rolls etc..As shown in Fig. 5 (b), being deposited in being formed, by core, the part 43' that material formed and become low grammes per square metre portion 43 etc. on difficult breathability feature 57, the part 42' being deposited on the bottom surface without difficult breathability feature 57 becomes high grammes per square metre portion 42 etc..Additionally, as mentioned above, by the middle section 41 of absorbent core 4A is pressurizeed, the high grammes per square metre portion 42 that density ratio low grammes per square metre portion 43 is high is formed at middle section 41, with the part of formation middle section 41 differently, by being pressurizeed in region, side 45, form the high grammes per square metre portion 46 that density ratio low grammes per square metre portion 47 is high in region, side 45.It also is able to carry out before being coated with by clad sheet or after cladding it addition, form the pressurization (compression) of high density portion 41a at the middle section 41 of absorbent core 4A.The pressurization (compression) of formation high density portion 41a both can be used in the pressurization of roller and middle section 41 that side face has step and carry out simultaneously, it is also possible to the pressurization with region, side 45 carries out simultaneously.Alternatively, it is also possible to be suitable size by the step design that will be formed in roller side face, and carry out with the pressurization of middle section 41 and the pressurization in region, side 45 simultaneously.And then, can also carry out in the step different from the pressurization of the pressurization of middle section 41 and region, side 45, before the pressurization of middle section 41, between pressurization and the pressurization in region, side 45 of middle section 41, after the pressurization in region, side 45, can also carry out in the step different from these pressurizations.

When manufacturing the absorbent core containing water absorbent polymer, it is preferable that the introduction part of water absorbent polymer is set in the midway of conduit.

As positive dough sheet 2a and non-skin lateral plate 3, it is possible to use the material identical with the material used in this technical field all the time with no particular limitation.Such as, the non-woven fabrics or membrana perforata with liquid permeability can be used as positive dough sheet 2a.As non-skin lateral plate 3, the water-repellancy non-woven fabrics that the water pressure resistances such as plastic liquid impermeability film or spunbond-melt blown-spunbond lamination non-woven fabrics are higher can be used.Additionally, as stereo enclosure formation sheet 2b, the water-repellancy non-woven fabrics such as spunbond-melt blown-spunbond lamination non-woven fabrics etc. that water pressure resistance is higher can be used.

Above, based on the preferred embodiment of the present invention, describe the present invention, but the present invention is not restricted to described embodiment.

Such as, the fluid drainage portion counterpart at absorbent commodity both can only have been formed from region 45, middle section 41 to side continuous print translot 44, it is possible to only form portion in the wings.

It addition, absorbent core both can only be formed by fibrous materials such as paper pulp fibers, it is possible to containing fibrous material and high water absorbency polymer.As fibrous material, the various materials of always absorber for absorbent commodities such as sanitary napkin, sanitary pad or disposable diapers can be used with no particular limitation, for instance the chopped fiber etc. of the synthetic fibers such as chopped fiber or polyethylene of paper pulp fiber, artificial (rayon) cellulosic fibre such as fiber, cotton fiber can be used.These fibers can be used alone a kind or combine two or more use.Additionally, fibrous material preferably all or part of be paper pulp fiber, the ratio of the paper pulp fiber in fibrous material is preferably 50～100 mass %, more preferably 80～100 mass %, and then preferably 100 mass %.It addition, in absorbent core, except high water absorbency polymer, it is possible to as required with the use of deodorizer or antibacterial etc..

It addition, in the above-described embodiment, the low grammes per square metre portion of density ratio in high grammes per square metre portion is high but it also may by omitting the pressurization steps of absorbent core, and makes both density identical.

It addition, except making positive dough sheet 2a be absorbed in, in press section 61 (compression unit), the pod 50 being formed at middle section 41, replace it, it is possible to so that front sheet 2a is absorbed in the translot 44a being formed at middle section 41 in press section.

It addition, the absorbent commodity of the present invention is except sanitary napkin, it is possible to for other absorbent commodities such as sanitary pad's (vaginal secretions protective pad), incontinence protection, disposable diapers.Said one embodiment illustrates that clipped and the key element only comprised in one embodiment can be respectively suitable for other embodiments, additionally, the key element in each embodiment can suitably phase double replacement between embodiment.

About above-mentioned embodiment, the present invention and then disclose following absorbent commodity.

< 1 > absorbent commodity, it has the absorbent core of shape longer on the fore-and-aft direction of absorbent commodity,

Described absorbent core has middle section in the width direction and is positioned at the region, side of these middle section both sides, this middle section has the protuberance highlighted upward than the respective upper surface in this region, side, described middle section and the region, described side of described absorbent core are integrally formed, and there is the high density portion that protuberance described in density ratio is high and grammes per square metre is higher than region, described side in the width both sides of this middle section, skin abutment face at described protuberance is formed with the pod of the length direction along this absorbent core, this pod is to reduce the grammes per square metre forming material of absorbent core and formed, and there is bottom in non-skin abutment face side, the width length of the width length ratio peristome of the described bottom of described pod is narrow.

The absorbent commodity of < 2 > such as described < 1 >, the width length of wherein said pod goes to become narrow gradually from peristome to bottom.

The absorbent commodity of < 3 > such as described < 1 > or < 2 >, wherein forms, at described protuberance, the translot that the width of oriented absorbent core extends.

The absorbent commodity of < 4 > such as described < 3 >, wherein said translot is configured with a plurality of in described longitudinal direction (the length direction synonym with described absorbent core) compartment of terrain.

< 5 > such as absorbent commodity any one of described < 1 > to < 4 >, wherein said pod passes through described protuberance in described longitudinal direction.

< 6 > such as absorbent commodity any one of described < 1 > to < 5 >, the positive dough sheet of liquid permeability wherein it is configured with in the skin abutment face side of described absorbent core, described middle section is provided with the press section that this positive dough sheet is pressed integratedly with this absorbent core, and described positive dough sheet is absorbed in described pod or translot in described press section.

< 7 > such as absorbent commodity any one of described < 1 > to < 6 >, the side pod that the length direction at this absorbent core extends, the width length of the peristome of this side pod and the width same length of bottom wherein it is configured with in the skin abutment face side in the region, side of described absorbent core.

< 8 > such as absorbent commodity any one of described < 1 > to < 7 >, wherein it is configured with, in the skin abutment face in the region, side of described absorbent core, the side pod that the length direction at this absorbent core extends

Described high density portion connects with described side pod.

< 9 > such as absorbent commodity any one of described < 1 > to < 8 >, the bottom with the described pod at the position of described side area adjacency of wherein said middle section is positioned at the upper surface position on the lower than this region, side.

< 10 > such as absorbent commodity any one of described < 1 > to < 9 >, the bottom with the described pod at the position of described side area adjacency of wherein said middle section is positioned at the position on the lower, bottom surface than this side pod.

< 11 > such as absorbent commodity any one of described < 3 > to < 10 >, wherein said translot has bottom in non-skin abutment face side, and is positioned at the position leaning on non-skin abutment face side than the upper surface in region, described side bottom this.

< 12 > such as absorbent commodity any one of described < 1 > to < 11 >, the width of wherein said protuberance is less than more than 20% 80% relative to the ratio of the whole width of absorbent core.

< 13 > such as absorbent commodity any one of described < 1 > to < 12 >, wherein said protuberance is formed in the length of more than the 30% of the total length of the fore-and-aft direction of absorbent commodity.

< 14 > such as absorbent commodity any one of described < 1 > to < 13 >, wherein at the middle section of absorbent core, high grammes per square metre portion is compared with low grammes per square metre portion, and the density of absorption piece is high.

< 15 > such as absorbent commodity any one of described < 1 > to < 14 >, wherein at described middle section, the grammes per square metre in the low grammes per square metre portion forming the bottom of described pod is less than more than 5% 80% relative to the ratio of the grammes per square metre in high grammes per square metre portion.

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

< 17 > such as absorbent commodity any one of described < 1 > to < 16 >, the thickness of wherein said middle section is less than more than 110% 400% relative to the ratio of the thickness in region, described side.

< 18 > such as absorbent commodity any one of described < 3 > to < 17 >, the translot in the translot of wherein said middle section and region, side is formed from the middle section of absorbent core to 1 translot of region, side continuous print, and this translot extends on the whole width of absorbent core.

< 19 > such as absorbent commodity any one of described < 1 > to < 18 >, wherein in region, described side, between described pod and positive dough sheet, there is gap.

< 20 > such as absorbent commodity any one of described < 1 > to < 19 >, wherein at described middle section, described positive dough sheet is absorbed in described translot in described press section.

< 21 > such as absorbent commodity any one of described < 1 > to < 20 >, the width length La of the peristome of the described pod of wherein said protuberance is preferably more than 0.5mm, and then it is preferably more than 1mm, additionally, it is preferably below 5mm, and then is preferably below 4mm.

< 22 > such as absorbent commodity any one of described < 1 > to < 21 >, the width length Lb of the bottom of the described pod of wherein said protuberance is preferably below 1mm, and then be preferably below 0.5mm, and lower limit is 0 (zero).

< 23 > such as absorbent commodity any one of described < 1 > to < 22 >, the degree of depth of the described pod of wherein said protuberance is more than 0.5mm below 5.0mm, and then is preferably more than 1.0mm below 3.0mm.

< 24 > such as absorbent commodity any one of described < 1 > to < 23 >, the difference (described in described La-Lb) of the peristome of the described pod of wherein said middle section and the width length of bottom is more than 0.5mm below 3.0mm, and then is preferably more than 1.0mm below 2.0mm.

< 25 > such as absorbent commodity any one of described < 1 > to < 24 >, the degree of depth of the described pod of wherein said middle section is less than more than 0.5 20 relative to the ratio [degree of depth/poor (described in described La-Lb)] of peristome Yu the difference (described in described La-Lb) of the width length of bottom, and then is preferably less than more than 1 10.

< 26 > such as absorbent commodity any one of described < 1 > to < 25 >, wherein said absorbent commodity is sanitary napkin.

Industrial utilizability

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

Claims

1. an absorbent commodity, it has the absorbent core of shape longer on the fore-and-aft direction of absorbent commodity, and described absorbent commodity is characterised by:

Described absorbent core has middle section and be positioned at the region, side of these middle section both sides at its width, and this middle section has the protuberance highlighted upward than the respective upper surface in this region, side,

Described middle section and the region, described side of described absorbent core are integrally formed, and described absorbent core has the high density portion that protuberance described in density ratio is high and grammes per square metre is higher than region, described side in the width both sides of this middle section,

Skin abutment face at described protuberance is formed with the pod of the length direction along this absorbent core, and this pod is to reduce the grammes per square metre forming material of absorbent core and formed, and has bottom in non-skin abutment face side,

The width length of the width length ratio peristome of the described bottom of described pod is narrow.

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

The width length of described pod goes to become narrow gradually from peristome to bottom.

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

The translot that the width of oriented absorbent core extends is formed at described protuberance.

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

Described translot compartment of terrain on the length direction of described absorbent core is configured with a plurality of.

5. the absorbent commodity as according to any one of Claims 1 to 4, it is characterised in that:

Described pod passes through described protuberance at the length direction of described absorbent core.

6. the absorbent commodity as according to any one of Claims 1 to 5, it is characterised in that:

It is configured with the positive dough sheet of liquid permeability in the skin abutment face side of described absorbent core, described middle section is provided with the press section that this positive dough sheet is pressed integratedly with this absorbent core,

Described positive dough sheet is absorbed in described pod in described press section.

7. the absorbent commodity as according to any one of claim 1～6, it is characterised in that:

The side pod that the length direction at this absorbent core extends, the width length of the peristome of this side pod and the width same length of bottom it is configured with in the skin abutment face side in the region, side of described absorbent core.

8. the absorbent commodity as according to any one of claim 1～7, it is characterised in that:

The side pod that the length direction at this absorbent core extends it is configured with in the skin abutment face side in the region, described side of described absorbent core,

Described high density portion connects with described side pod.

9. the absorbent commodity as according to any one of claim 1～8, it is characterised in that:

The bottom of described pod is positioned at the upper surface position on the lower than region, described side.

10. the absorbent commodity as according to any one of claim 1～9, it is characterised in that:

Be configured with the side pod that the length direction at this absorbent core extends in the skin abutment face side in the region, described side of described absorbent core, the bottom of described pod is positioned at the position on the lower, bottom surface than described side pod.

11. the absorbent commodity as according to any one of claim 3～10, it is characterised in that:

Described translot has bottom in non-skin abutment face side, is positioned at the position leaning on non-skin abutment face side than the upper surface in region, described side bottom this.

12. the absorbent commodity as according to any one of claim 1～11, it is characterised in that:

The width of described protuberance is less than more than 20% 80% relative to the ratio of the whole width of absorbent core.

13. the absorbent commodity as according to any one of claim 1～12, it is characterised in that:

Described protuberance is formed in the length of more than the 30% of the total length of the fore-and-aft direction of absorbent commodity.

14. the absorbent commodity as according to any one of claim 1～13, it is characterised in that:

At described middle section, the width of described absorbent core is alternately formed with the low grammes per square metre portion of the bottom of high grammes per square metre portion and the described pod of formation,

Described high grammes per square metre portion is compared with described low grammes per square metre portion, and the density of absorption piece is high.

15. the absorbent commodity as according to any one of claim 1～14, it is characterised in that:

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

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

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

17. the absorbent commodity as according to any one of claim 1～16, it is characterised in that:

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

18. the absorbent commodity as according to any one of claim 3～17, it is characterised in that:

The translot in the translot of described middle section and region, side is formed from the middle section of absorbent core to 1 translot of region, side continuous print, and this translot extends on the whole width of absorbent core.

19. the absorbent commodity as according to any one of claim 1～18, it is characterised in that:

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

In region, described side, between described pod and positive dough sheet, there is gap.

20. the absorbent commodity as according to any one of claim 3～19, it is characterised in that:

It is configured with the positive dough sheet of liquid permeability in the skin abutment face side of described absorbent core, described middle section is provided with the press section that this positive dough sheet is extruded integratedly with this absorbent core,

At described middle section, described positive dough sheet is absorbed in described translot in described press section.

21. the absorbent commodity as according to any one of claim 1～20, it is characterised in that:

The width length La of the peristome of the described pod of described protuberance is more than 0.5mm below 5mm.

22. the absorbent commodity as according to any one of claim 1～21, it is characterised in that:

The width length Lb of the bottom of the described pod of described protuberance is below 1mm and lower limit is 0.

23. the absorbent commodity as according to any one of claim 1～22, it is characterised in that:

The degree of depth of the described pod of described protuberance is more than 0.5mm below 5.0mm.

24. the absorbent commodity as according to any one of claim 1～23, it is characterised in that:

The difference (described in described La-Lb) of the peristome of the described pod of described middle section and the width length of bottom is more than 0.5mm below 3.0mm.

25. the absorbent commodity as according to any one of claim 1～24, it is characterised in that:

The degree of depth of the described pod of described middle section is less than more than 0.5 20 relative to the ratio [degree of depth/poor (described in described La-Lb)] of peristome Yu the difference (described in described La-Lb) of the width length of bottom.

26. the absorbent commodity as according to any one of claim 1～25, it is characterised in that:

Described absorbent commodity is sanitary napkin.