CN101061978B - Absorbent article - Google Patents
Absorbent article Download PDFInfo
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- CN101061978B CN101061978B CN200710091758.0A CN200710091758A CN101061978B CN 101061978 B CN101061978 B CN 101061978B CN 200710091758 A CN200710091758 A CN 200710091758A CN 101061978 B CN101061978 B CN 101061978B
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- Prior art keywords
- leakage barriers
- side leakage
- woven fabrics
- protuberance
- main body
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- Absorbent Articles And Supports Therefor (AREA)
Abstract
An absorbent material (1), which is elongated virtually, is provided with absorbent main body (10) containing an absorption layer (11) and a leakage protective layer (12). A pair of side leakage protective part (5, 5) is set on both side parts on the length direction of skin contact side of the absorbent main body (10). The side leakage protective parts (5, 5) are separately composed of bouffant non-woven fabrics (50) with unevennesses. The non-woven fabrics (50) overlap into two layers in the way of making the face (50a, 50a') with unevennesses face each other. The concave of one face is attached with the convex of the other face in opposite faces (50a, 50a').
Description
Technical field
The present invention relates to the absorbent commodities such as sanitary napkin, underwear back boxing, incontinence pad.
Background technology
In the past, in the absorbent commodities such as sanitary napkin, there is a kind of product that is provided with a pair of side leakage barriers.In this absorbent commodity, in order to prevent, from thering are the both sides of the absorbent main body of absorbed layer and application of anti-leakage layers, side leakage occurs, in the skin contact Mian Yice both sides of absorbent main body, be provided with a pair of side leakage barriers.Thus, in the length direction both sides of skin contact face one side of absorbent commodity, form the region that suppresses liquid diffusion, and form three-dimensional wall according to different situations, thereby can prevent that liquid is towards transverse shifting.
And, a kind of sanitary napkin with a pair of side leakage barriers has been proposed in JP-A 11-514551 communique, wherein side leakage barriers consists of the flexibility parts and the elastomeric element that produce resistance to compression pression and bending resistance.
In JP-A 11-514551 communique, following sanitary napkin being disclosed: possesses the absorbent main body with absorbed layer and application of anti-leakage layers, be in fact elongate shape, length direction both sides in skin contact face one side of above-mentioned absorbent main body are provided with a pair of side leakage barriers, a pair of side leakage barriers has respectively flexibility parts and the elastomeric element that Dui Gai side leakage barriers produces resistance to compression pression and bending resistance, elastomeric element possesses the first position and the second position, the first position and second position of elastomeric element are visually different, the second position has the part of the rib shape of a plurality of protuberances, the first position has at least two positions that are essentially plane, elastomeric element becomes C word shape in the folded around of flexibility parts.
In addition, good, the anti-fold property of a kind of fit and the good sanitary napkin of anti-leakage are disclosed in JP-A 11-299821 communique.
The applicant had previously proposed following sanitary napkin in JP-A 11-299821 communique: possess the positive layer of liquid permeability, the absorbed layer of the application of anti-leakage layers of liquid impermeability and the liquid retainability between two-layer, and form in fact elongate shape, in the portion of the limit, the left and right sides of absorbent commodity, according to above-mentioned dual-side is positioned at than the side of absorbed layer, more by the mode of the position of the inner side of absorbent commodity, be respectively arranged with banded elastic sheet material, by this elastic sheet material, formed the hollow bulb of pair of right and left ring-type.
In addition, in JP 2001-145667 communique, following sanitary napkin is disclosed: the face sheet that is provided with the liquid permeability arranging in front, back-sheet, be clipped in two absorbed layers between sheet material and in positive width both sides and the side leakage barriers extending longitudinally, side leakage barriers has the side wall portion erecting from front and the skin extending towards the outside of width from the upper end of side wall portion is close to portion, on the mid portion of the short transverse of side wall portion, be vertically arranged with the induction portion that folds into, when the skin portion of being close to is compressed on front, invagination induction portion folds into side wall portion towards the outside of width.Side leakage barriers forms by being hot pressed into the non-woven fabrics doubling of wave-like, has realized the stabilisation of its three-dimensional shape.
Summary of the invention
The absorbent commodity of the first invention of the present invention possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and be in fact elongate shape, wherein, length direction both sides in skin contact face one side of above-mentioned absorbent main body are provided with a pair of side leakage barriers, above-mentioned a pair of side leakage barriers is formed by the irregular bulk non-woven fabrics of tool respectively, above-mentioned non-woven fabrics is overlapped into 2 layers according to having above-mentioned concavo-convex face mode respect to one another, and the protuberance among relative above-mentioned two sides on a face contacts with the protuberance on another face.
The absorbent commodity of the second invention of the present invention possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and is in fact elongate shape, wherein, in the length direction both sides of skin contact face one side of above-mentioned absorbent main body, is provided with a pair of side leakage barriers; Above-mentioned a pair of side leakage barriers is following formation respectively: by the side leakage barriers with a large amount of embossed portion, form sheet material has the end of turning back mode according to the inner side of the width in above-mentioned absorbent main body above-mentioned side leakage barriers is formed to the outside that sheet material is gone back to the above-mentioned width of above-mentioned absorbent main body; Front end in the above-mentioned end of turning back does not form above-mentioned embossed portion, and it is stacked and engage integrated formation by a large amount of embossed portion by 2 above non-woven fabrics that above-mentioned side leakage barriers forms sheet material; Non-embossed portion is swelled laterally by forming above-mentioned embossed portion.
The absorbent commodity of the 3rd invention of the present invention possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and is in fact elongate shape, wherein, in the length direction both sides of skin contact face one side of above-mentioned absorbent main body, is provided with a pair of side leakage barriers; Above-mentioned a pair of side leakage barriers is following formation respectively: by the side leakage barriers with a large amount of embossed portion, form sheet material has the end of turning back mode according to the inner side of the width in above-mentioned absorbent main body above-mentioned side leakage barriers is formed to the outside that sheet material is gone back to the above-mentioned width of above-mentioned absorbent main body; Above-mentioned embossed portion is side-prominent at the relative inner surface one of the above-mentioned side leakage barriers formation sheet material turning back respectively; Above-mentioned embossed portion front end separately forms plane, and this plane part is by filming.
Accompanying drawing explanation
Fig. 1 means the axonometric chart as the first embodiment of the sanitary napkin of the absorbent commodity of the first invention of the present invention.
Fig. 2 is the X-X line profile in Fig. 1.
Fig. 3 amplifies by a part that forms the non-woven fabrics of the side leakage barriers of embodiment shown in Fig. 1 the axonometric chart representing.
Fig. 4 means the Y-Y line profile of Fig. 3 of the state contacting between protuberance after the doubling of non-woven fabrics shown in Fig. 3.
Fig. 5 (a) and Fig. 5 (b) amplify by a part for the non-woven fabrics of the side leakage barriers of the sanitary napkin of formation the second embodiment the figure representing, Fig. 5 (a) is the axonometric chart that is equivalent to Fig. 3, and Fig. 5 (b) is the Z-Z line profile of Fig. 5 (a).
Fig. 6 means the profile that is equivalent to Fig. 2 of another embodiment of the invention.
Fig. 7 means the profile that is equivalent to Fig. 2 of another embodiment of the present invention.
Fig. 8 means the axonometric chart as an embodiment of the sanitary napkin of the absorbent commodity of the second invention of the present invention.
Fig. 9 is the X-X line profile in Fig. 8.
Figure 10 (a) and Figure 10 (b) amplify by a part for the side leakage barriers of sanitary napkin shown in Fig. 8 the profile representing, Figure 10 (a) is the part that non-embossed portion contacts with each other, and Figure 10 (b) is the end of turning back.
Figure 11 means that the side leakage barriers of the side leakage barriers that forms sanitary napkin shown in Fig. 8 forms the partial top view of the deployed condition of sheet material.
Figure 12 (a)-Figure 12 (d) is the schematic diagram of wanting portion of the first embodiment of the manufacture method of absorbent commodity of the present invention.
Figure 13 (a)-Figure 13 (d) is the schematic diagram of wanting portion of the second embodiment of the manufacture method of another absorbent commodity of the present invention.
Figure 14 means the axonometric chart as an embodiment of the sanitary napkin of the absorbent commodity of the 3rd invention of the present invention.
Figure 15 is the X-X line profile in Figure 14.
Figure 16 amplifies by a part for the side leakage barriers of sanitary napkin shown in Figure 14 the profile representing.
Figure 17 will amplify the top view representing near the inner side edge portion of the side leakage barriers of sanitary napkin shown in Figure 14.
Figure 18 means that the side leakage barriers of the side leakage barriers that forms sanitary napkin shown in Figure 14 forms the partial top view of the deployed condition of sheet material.
Figure 19 (a) and Figure 19 (b) are the key diagrams of the manufacture method of preferred absorbent commodity of the present invention.
Figure 20 means the top view that is equivalent to Figure 18 of the variation of absorbent commodity of the present invention.
The specific embodiment
The elastomeric element of the skin contact of the side leakage barriers Zhong，Yu sanitary towel wearer of the sanitary napkin of recording in JP-A 11-514551 communique is formed by thin film, and wearing comfort is poor.In addition, the part of rib shape is hollow, and elastomeric element itself do not have the stability of three-dimensional shape, so need to have flexibility parts as backing material.
In addition, in the sanitary napkin of recording in JP-A 11-299821 communique, there is the hollow ring that formed by elastic sheet material as side leakage barriers, but because this side leakage barriers is hollow, so in the place remaining to be further improved in addition aspect the stability of its three-dimensional shape.
Therefore, the first invention of the present invention relates to the absorbent commodity that has the stability of simple in structure and three-dimensional shape and dress the side leakage barriers that comfort is good.
In addition, the second invention of the present invention relates to the absorbent commodity of the side leakage barriers with the excellent in stability of dressing comfort and three-dimensional shape.
In addition,, in the side leakage barriers of the sanitary napkin of recording in JP 2001-145667 communique, the fiber that compresses strong non-woven fabrics by hot pressing has formed top and the bottom of wave-like.Therefore,, while dressing sanitary towel, hard top and the skin contact of wearer, so can think that the wearing comfort of side leakage barriers is bad.
Therefore, the 3rd invention of the present invention relates to the absorbent commodity of the side leakage barriers of the excellent in stability with simple in structure and wearing comfort and three-dimensional shape.
The first invention of the present invention relates to a kind of following absorbent commodity, it possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and be in fact elongate shape, wherein, length direction both sides in skin contact face one side of above-mentioned absorbent main body are provided with a pair of side leakage barriers, above-mentioned a pair of side leakage barriers is formed by the irregular bulk non-woven fabrics of tool respectively, above-mentioned non-woven fabrics is overlapped into 2 layers according to having above-mentioned concavo-convex face mode respect to one another, and the protuberance among relative above-mentioned two sides on a face contacts with the protuberance on another face.
The second invention of the present invention relates to a kind of following absorbent commodity, it possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and be in fact elongate shape, wherein, length direction both sides in skin contact face one side of above-mentioned absorbent main body are provided with a pair of side leakage barriers, above-mentioned a pair of side leakage barriers respectively by the side leakage barriers with a large amount of embossed portion form sheet material has an end of turning back mode according to the inner side of the width in above-mentioned absorbent main body by above-mentioned side leakage barriers form sheet material go back to above-mentioned absorbent main body above-mentioned width outside and form, front end in the above-mentioned end of turning back does not form above-mentioned embossed portion, it is stacked and engage integrated formation by a large amount of embossed portion by 2 above non-woven fabrics that above-mentioned side leakage barriers forms sheet material, non-embossed portion is swelled laterally by forming above-mentioned embossed portion.
The 3rd invention of the present invention relates to a kind of following absorbent commodity, it possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and be in fact elongate shape, wherein, length direction both sides in skin contact face one side of above-mentioned absorbent main body are provided with a pair of side leakage barriers, above-mentioned a pair of side leakage barriers respectively by the side leakage barriers with a large amount of embossed portion form sheet material has an end of turning back mode according to the inner side of the width in above-mentioned absorbent main body by above-mentioned side leakage barriers form sheet material go back to above-mentioned absorbent main body above-mentioned width outside and form, above-mentioned embossed portion is side-prominent at the relative inner surface one of the above-mentioned side leakage barriers formation sheet material turning back respectively, above-mentioned embossed portion front end separately forms plane, and this plane part is by filming.
According to the absorbent commodity with side leakage barriers of the first invention of the present invention, side leakage barriers simple in structure and there is the stability of good three-dimensional shape and dress comfort.
According to the absorbent commodity with side leakage barriers of the second invention of the present invention, side leakage barriers has good wearing comfort.In addition, the mode Jiang Gai side leakage barriers contacting with each other by the non-embossed portion according on the relative inner surface of side leakage barriers formation sheet material forms sheet material and turns back, and can improve stability and the wearing comfort of the three-dimensional shape of side leakage barriers.
According to the absorbent commodity with side leakage barriers of the 3rd invention of the present invention, side leakage barriers simple in structure and there is good wearing comfort.In addition, the mode Jiang Gai side leakage barriers contacting with each other by the embossed portion according on the relative inner surface of side leakage barriers formation sheet material forms sheet material and turns back, and can improve stability and the wearing comfort of the three-dimensional shape of side leakage barriers.
Below, preferred the first embodiment with reference to Fig. 1-4 pair the of the present invention first absorbent commodity of inventing describes.
As depicted in figs. 1 and 2, the absorbent commodity 1 of the present embodiment is sanitary napkin, possesses the absorbent main body 10 with the absorbed layer 11 of liquid retainability and the application of anti-leakage layers 12 of liquid impermeability, and is in fact elongate shape.Absorbed layer 11 in sanitary towel 1 consists of the face sheet 2 of liquid permeability and the absorber 4 of liquid retainability, and application of anti-leakage layers 12 consists of the back-sheet 3 with breathability and liquid impermeability.
In addition, in the sanitary napkin 1 of the present embodiment, on the length direction both sides of skin contact face one side of absorbent main body 10, be provided with a pair of side leakage barriers 5,5, and cover this both sides.A pair of side leakage barriers 5,5 is formed by the irregular bulk non-woven fabrics 50 of tool respectively, non-woven fabrics 50 is overlapped into 2 layers according to irregular 50a, 50a ' mode respect to one another of tool, in relative above-mentioned 50a, 50a ', the protuberance 53 in a face contacts with the protuberance 53 ' in another face.
Below the sanitary napkin 1 of the present embodiment is described in further detail.Face sheet 2 and back-sheet 3 are respectively elongate shape, and its length direction is consistent with the length direction of sanitary towel 1.Absorber 4 is elongate shape, and its length direction is consistent with the length direction of sanitary towel 1, is clamped and fixed between face sheet 2 and back-sheet 3.The width of face sheet 2 forms roughly the samely with the width of absorber 4, and narrower than the width of back-sheet 3.Face sheet 2 covers the whole surf zone of skin contact face one side of absorber 4.Face sheet 2 and back-sheet 3 are stretched out from the length direction two ends of absorber 4 respectively, in the place of its extension by heat seal, utilize bonding agent to carry out the known joint method such as bonding to be bonded with each other.
In addition, as shown in Figure 2, sanitary towel 1 has a pair of alar part 6,6 stretching out from the dual-side of the length direction of absorbent main body 10, and this pair of alar part 6,6 is formed by the non-woven fabrics 50 that leakage barriers 5 is stretched out from the side respectively.
Below a pair of side leakage barriers 5,5 in the sanitary towel 1 of the present embodiment is further illustrated.As shown in Figure 1, a pair of side leakage barriers 5,5 forms respectively elongate shape, and its length direction is consistent with sanitary towel 1.In addition, a pair of side leakage barriers 5,5 spreads all over respectively between the both ends of sanitary towel's length direction and configures.
As shown in Figure 2, the non-woven fabrics 50 that forms respectively a pair of side leakage barriers 5,5 turns back in interior side direction absorbed layer 11 1 sides of napkin width direction, and its end of turning back has formed the inner side edge portion 51 of side leakage barriers 5.The leading section of the non-woven fabrics 50 turning back in addition, engages with face sheet 2 at sealing 9 places.Near the side leakage barriers 5 overleaf sealing 8 that passes through in width end of sheet material 3 engages with back-sheet 3.Sealing 8 and sealing 9 by heat seal, utilize bonding agent to carry out the known joint method such as bonding to form.
Inner side edge portion 51 and the part between sealing 9 in the non-woven fabrics 50 of non-skin contact face one side of turning back do not engage with face sheet 2, formed three-dimensional barrier, and then by forming groove 7 described later, absorbed layer 11 is absorbed in and increases three-dimensional degree in the surrounding of groove 7, from napkin width direction inner side, flow to its continuation movement in the liquid ， side leakage barriers 5 face sheet 2 and obtained prevention.In addition ， sanitary towel length direction both ends, the inner side edge portion 51 in the non-woven fabrics 50 of non-skin contact face one side of turning back and the part between sealing 9 spread all over roughly whole or engage (not shown) with face sheet 2 near inner side edge portion 51.
As shown in Figure 2, as described above, near a pair of side leakage barriers 5,5 respectively sealing 8 places in the region length direction dual-side of absorbent main body 10 engages with back-sheet 3.The shape of sealing 8 has the shape of tightening up to napkin width direction inner side at the central part of length direction so that when the alar part 6 arranging is continuously during along the edge part bending of panty crotch, alar part 6 easily and the edge part of this panty crotch identical.
From obtaining the viewpoint of good anti-leakage and wearing comfort, a pair of side leakage barriers 5,5 width separately preferably has following size.In the part of a pair of alar part 6,6 of being provided with of sanitary towel's length direction, on the length direction centrage of its alar part 6, in napkin width direction along the surface measurements of side leakage barriers 5 to sealing 8 and the length between the ora terminalis of inner side edge portion 51 1 sides be preferably 10-30mm, be particularly preferably 15-25mm.
The non-woven fabrics 50 that forms side leakage barriers 5 carries out embossing processing to bulk non-woven fabrics Cong Qi two sides and forms, and as shown in Figures 2 and 3, two sides has protuberance 53.
In non-woven fabrics 50, the junction surface 52 that embossing is processed to form is configured to so-called jagged pattern, and each junction surface 52 forms discontinuously to overlook circle respectively.Junction surface 52 is compacted, and compares with other position in non-woven fabrics 50, and thickness is little and density is large, has formed recess.
Part between ， junction surface 52 (specifically ，Si Ge bight has the essentially rectangular part at junction surface 52) forms convex (semicircle is spherical) as shown in Figure 3, thus, on non-woven fabrics 50 two sides, has formed a large amount of protuberance 53.The inside of each protuberance 53 has been full of the fiber that forms non-woven fabrics 50, and protuberance 53 is the states of having filled fibrous material.On non-woven fabrics 50 two sides decentralized configuration each protuberance 53 independently.
Thereby from improve the three-dimensional viewpoint that improves anti-leakage, obtains the good wearing comfort of side leakage barriers 5 of side leakage barriers 5 simultaneously, the mass area ratio of non-woven fabrics 50 is preferably 20-100g/m
2, be particularly preferably 25-50g/m
2.
The mensuration of mass area ratio is for example measured as follows.Non-woven fabrics 50 severings are become to size more than 10mm * 10mm, and preferably severing becomes that in big or small ，Cong Yige sanitary towel more than 30mm * 30mm, to intercept the gross area be 250mm
2above test piece, measures the weight of this test piece with the minimum electronic balance that is shown as 1mg, convert and obtain mass area ratio.In order to improve the mensuration precision of mass area ratio, preferably from a plurality of sanitary towels intercepting test piece, obtain the meansigma methods of 5 above measured values.
From with above-mentioned same viewpoint, the height T (with reference to Fig. 4) of the protuberance 53 in non-woven fabrics 50 is preferably 0.3-5mm, is particularly preferably 0.5-3mm.The height T of the height T of the protuberance 53 of inner surface one side on ，Yi junction surface 52Wei border and the protuberance 53 of outer surface one side in addition
1, from being easy to obtain the viewpoint of buffering sense and surperficial smooth touch, preferred T compares T
1high or equal.
Here, the height T of protuberance 53 for example measures as follows.First, the length cutting out in length and breadth from non-woven fabrics 50 is big or small test film more than 10mm * 10mm.Then, use by the line of junction surface 52 and protuberance 53 and make cutting plane.With microscope, (KEYENCE Co., Ltd. manufactures, and VH-8000) obtains the enlarged photograph of this section.According to the ratio of enlarged photograph, measure the height T (with reference to Fig. 4) of from protuberance 53 top to bottom (upper surface at adjacent junction surface 52).Height T obtains by measuring inner surface 50a mono-side of the non-woven fabrics 50 of skin contact face one side of stretching out to the inner side of napkin width direction.The non-woven fabrics of non-skin contact face one side of turning back also has situation about being bonded together with face sheet etc., is not preferred for highly measurement.In addition, preferably, before measuring section, use the KES-G5 HANDY-TYPECOMPRESSION TESTER (KATO TECH Corporation) of KES measuring system, in advance detect thickness T
0(0.5g/cm
2thickness under load), confirm thickness T
z(with reference to Fig. 4) is thickness T
090-110%, if lower than 90% or be more than 140%, position is measured in conversion, 110-130% if, by specimen holder in 2 plates to adjust after thickness, by enlarged photograph measuring height T.
In addition, from easily making the crooked or bending of non-woven fabrics 50, form the viewpoint of a large amount of protuberance 53 simultaneously, in non-woven fabrics 50, the length (distance between centers at junction surface) between the immediate junction surface 52 of distance is preferably 1-10mm, is particularly preferably 2-7mm.
As shown in Figure 3, the row of many protuberance 53He junction surface 52 alternative arrangements on above-mentioned non-woven fabrics 50, have been formed.Although non-woven fabrics 50 is bulk, by being provided as the easily crooked or bending that becomes of the junction surface 52 of recess.The above-mentioned row that non-woven fabrics 50 is particularly arranged along a plurality of junction surfaces 52 partition distance, can be easily crooked.Specifically, as the junction surface 52 of recess itself owing to being compacted than the tendency that becomes harder around, therefore can be along junction surface 52 thickness degree around can not cause the thickness part of bending difficulty, along surrounding's bending of recess.
A pair of side leakage barriers 5,5 is bonded on respectively in absorbent main body 10, makes the row of protuberance 53He junction surface 52 alternative arrangements on non-woven fabrics 50 along the length direction of sanitary towel.In addition, in side leakage barriers 5, the row of protuberance 53He junction surface 52 alternative arrangements have also formed multiple row in the width of ， sanitary towel and the direction that tilts at the width with respect to sanitary towel or length direction on being formed on the length direction of sanitary towel.
Inner side edge portion 51 in side leakage barriers 5 is turned back and forms along the row of protuberance 53He junction surface 52 alternative arrangements by non-woven fabrics 50, so even if non-woven fabrics 50 is bulk, also easily being turned back and being not easy produces wrinkle because this turns back.
In addition,, when wearing sanitary towel 1 makes its skin along wearer crooked, the reason based on same, is not easy to produce wrinkle on non-woven fabrics 50.Therefore, side leakage barriers 5 is not easy to produce the wrinkle extending to napkin width direction, prevents that liquid is towards the function admirable of this direction seepage.
In the part that non-woven fabrics 50 in side leakage barriers 5 is folded in half, as shown in Figure 2 and Figure 4, the protuberance 53 in a face 50a contacts with the protuberance 53 ' in another face 50a ' for relative face 50a, 50a '.
Here, so-called contact refers to following state: protuberance 53 and protuberance 53 ' contact in any mode with distortion of protuberance 53 or protuberance 53 ' at least, and while overlooking, the section of protuberance is overlapping.Protuberance 53,53 ' is the state of having filled fibrous material, and distortion is had to elasticity.Therefore, the three-dimensional shape of side leakage barriers 5 is to consist of the contact condition with distortion between protuberance 53,53 ', for the distortion that comes from outside side leakage barriers 5, has the restoring force that elasticity produces and has stability.
In addition, the section of so-called protuberance refers to, on the thickness direction of non-woven fabrics 50, and on the position that the lowermost portion of the highest part of protuberance and recess is divided equally, this cutting plane (with reference to Fig. 4) when protuberance is dissectd with imaginary plane P.
The stable viewpoint of three-dimensional shape of Cong Shi side leakage barriers 5 is set out, and the equitant ratio of section of protuberance 53 is preferably 10-90%, is particularly preferably 20-80%.Wherein, the equitant ratio of the section of protuberance is the section of a protuberance and the equitant ratio of the section of another protuberance in 2 protuberances that contact.That is,, if the section of a protuberance is all overlapping with the section of another protuberance, the equitant ratio of the section of protuberance is 100%.When the different protuberance of the area of section of protuberance contacts with each other, the section of the large protuberance of this area of section is set as to the section of a protuberance.
Here, protuberance is as given a definition.
According to and the same step of above-mentioned height T and measuring method obtain the height H of the bump between the recess that is processed to form by embossing and the recess adjacent with this recess
1.Now, in the situation that can be not by the protuberance 53 top of swelling most to carrying out a plurality of measurements between recess, will in measurement result, swell the minimum height H that is set as
1.Than this height H
1outstanding position is set as protuberance.
Then, measure as described below the area of section of protuberance.The area of section of protuberance 53 is supposition height H
1area while dissecing protuberance 53.
First, inner surface 50a, the 50a ' that takes relative non-woven fabrics 50 with above-mentioned microscope with 20-100 any multiplying power (selecting top to shine the multiplying power of 5-10) the doubly plane photo separately row image of going forward side by side is preserved (necessary words are printed).Then, on plane photo, record from the line (being set as below top one recess line) of extremely adjacent with this protuberance recess in the top of each protuberance.
Then, be conceived to certain protuberance 53, cutting plane is measured.The measurement of cutting plane must be carried out for all recess adjacent with raised part.The quantity of the recess adjacent with raised part is preferably more than 3.Each is measured and carries out as follows: use and obtained above-mentioned height H
1cutting plane, on this cutting plane, record represents height H
1line (H
1line), obtain from H
1on line, be equivalent to the position at top to the length of the profile of protuberance, according to the meansigma methods of these length, be reflected to the result demonstration on plane photo, the profile of protuberance is circular or oval, by this circle or the oval area of section that is set as protuberance.
Protuberances all in plane photo is carried out to same operation.
The section of protuberance overlapping is by being reproduced in state that inner side edge portion 51 turns back, come the plane photo of the inner surface 50a in the non-woven fabrics 50 of skin contact face one side that the inner side of subtend napkin width direction stretches out and the plane photo of the inner surface 50a ' in the non-woven fabrics 50 of the area of section of the protuberance of this record and non-skin contact face one side of turning back and measure in the area of section of the protuberance of this record.In order to reproduce overlap condition, use, in a plane photo, the area of section of another transparent or semitransparent protuberance is reflected to the method on film; Utilize the layer structure of software to make the overlapping method of the area of section of protuberance etc., with image analysis software (the NEWQUBE ver.4.22 of NEXUS system), measure the area of overlapping portion.By the area of section (area of section the greater) of the area of the overlapping portion obtaining and the protuberance of plane photo, measured the equitant ratio of section of protuberance 53.
In the part of non-woven fabrics 50 doublings in ， side leakage barriers 5, between relative face all protuberances separately, can not contact in addition yet.Its reason is, near the overlapping of protuberance producing inner side edge portion 51, makes between inner side edge Bu51He junction surface 9, and face 50a dough-making powder 50a ' easily separates, and forms discontiguous state between protuberance.The situation of this float state is more preferably from improving the viewpoint of buffering sense.
Below the sanitary towel 1 of the present embodiment is further illustrated.A pair of alar part 6,6 is formed by the side leakage barriers 5 of the same side of a non-woven fabrics 50Yu sanitary towel length direction respectively, and the middle section of the outer side edges portion of the length direction of leakage barriers 5 stretches out laterally from the side.
In addition, on a face of non-woven fabrics 50 that forms respectively a pair of alar part 6,6, be provided with for the alar part 6 of the edge part bending along panty crotch being fixed on to the adhesive layer (not shown) of the outer surface of this underwear.
In skin contact face one side of the absorbent main body 10 in ， sanitary towel 1, be provided with groove 7 as shown in Figure 1.Groove 7 is formed by a pair of embossing groove extending in the longitudinal direction and the 2 circular-arc laminations flower grooves that extend in the both ends of the length direction of this embossing groove broad ways.In addition a pair of above-mentioned embossing groove extending in the longitudinal direction, has respectively the shape of tightening up to the inside.By groove 7, face sheet 2 and absorber 4 engage.
As shown in Figure 2, the inner side edge portion 51 of side leakage barriers 5 is located in the outside of groove 7.
Below, the material that just forms the sanitary towel 1 of the present embodiment describes.Non-woven fabrics as forming side leakage barriers 5, can be used the various non-woven fabrics that in the past used in the absorbent commodities such as sanitary napkin with no particular limitation, preferably uses the non-woven fabrics of water proofing property.Can list the sheet material (such as SM, SMS, SMMS etc.) that is composited such as Nonwovens of spunbond, Nonwovens of spunbond (S) and meltblown non-woven fabrics (M), utilize combing method or air lay method to form water proofing property (hydrophobicity) non-woven fabrics such as fibroreticulate hot-rolling method non-woven fabrics, hot blast method non-woven fabrics.From improve the viewpoint of buffering sense by increasing bulkiness, also preferably as Nonwovens of spunbond or SMS sheet material and hot blast method non-woven fabrics made to composite sheet by the overlapping rear use of multiple non-woven fabrics, now, in the part as a positive side, use the non-woven fabrics of water proofing property.
In addition, as the formation material of face sheet 2, back-sheet 3 or absorber 4, can use with no particular limitation the various materials that in the past used in the absorbent commodities such as sanitary napkin.
According to the sanitary napkin 1 of above-mentioned the present embodiment, the irregular bulk non-woven fabrics 50 of tool is according to having mode doubling relative between this concavo-convex face, thereby formed side leakage barriers 5, simple in structure and easily manufacture, and also the stability of its three-dimensional shape is good with wearing comfort.In addition, side leakage barriers 5 is the skin contact with wearer with its protuberance 53, so skin sense of touch is good.
In addition, side leakage barriers 5 and alar part 6 are formed by a non-woven fabrics 50, and it is easy that its manufacture becomes.
Below, the sanitary napkin of the second embodiment of just the present invention (the first invention) describes with reference to Fig. 5.The place that there is no special instruction for the second embodiment, can the suitable applicable detailed description that above-mentioned embodiment is carried out.In addition, in Fig. 5, the parts identical with Fig. 1-4 are represented with identical symbol.
In the sanitary towel 1 of preferred the second embodiment of the present invention, on a pair of side leakage barriers 5,5 each comfortable sanitary towel length directions and width, there is respectively retractility.A pair of side leakage barriers 5,5 is engaged in respectively on the length direction both sides of skin contact face one side of absorbent main body 10 under the state extending along its length.
Naturalness Xia sanitary towel 1 due on the contractility Er sanitary towel length direction of a pair of side leakage barriers 5,5 towards the skin contact face curving of this sanitary towel 1.So-called naturalness, refers to that the external force beyond gravity does not act in fact the state of sanitary towel 1.
In the sanitary towel 1 of the present embodiment, the non-woven fabrics 50 that forms side leakage barriers 5 and alar part 6 has retractility.Here, so-called retractility in this description, refer under the pulling force of hands and be stretched, when this pulling force disappears, non-woven fabrics shrinks the character that returns to original state, for retractility, preferably have in the situation that stretching with have gentle hands is light, after disappearing, pulling force can return to the roughly elasticity of original state.
The side leakage barriers 5 being formed by non-woven fabrics 50 can be in the face that comprises the length direction of sanitary towel 1 and the non-woven fabrics 50 of this both direction of width be carried out elastic telescopic in all directions of 360 °.
Relevant other structure is identical with above-mentioned embodiment.
Below, the non-woven fabrics 50 of the present embodiment is further illustrated.
As shown in Fig. 5 (a) and Fig. 5 (b), non-woven fabrics 50 by being disposed at a ground floor 54 on face, be disposed at the second layer 55 on another face and between this is two-layer the 3rd layer 56 stacked after junction surface 52 by predetermined pattern engage partly.Non-woven fabrics 50Zhong junction surface 52 is configured to so-called jagged pattern, and each junction surface 52 forms discontinuously to overlook circle respectively.Junction surface 52 is compacted, and compares with other position in non-woven fabrics 50, and it is large that less thick and density become, and formed recess.
Part at ground floor 54Zhong， junction surface beyond 52 forms convex.That is, non-woven fabrics 50 is when overlooking, and the part between ground floor 54 junction surface 52 (specifically ，Si Ge bight has the essentially rectangular part at junction surface 52) forms convex (semicircle is spherical), thus, has formed a large amount of protuberance 53a.The inside of each protuberance 53a has been full of the fiber that forms ground floor 54, in addition, although the interface between the ground floor between junction surface 54 and the 3rd layer 56 does not engage, spreads all over whole region and has formed closely sealed state.
In the second layer 55, except the contrary side of the protuberance 53a towards with ground floor 54 has formed a large amount of protuberance 53b, and ground floor 54 has same structure.
Below, just form the ground floor 54, the second layer 55 of non-woven fabrics 50 and the formation fiber of the 3rd layer 56 and describe in detail respectively.First, as the fiber that forms ground floor 54 and the second layer 55, preferably use the fiber being formed by thermoplastic, polymeric materials.As thermoplastic, polymeric materials, can list the polyester such as the polyolefin such as polyethylene and polypropylene, polyethylene terephthalate, polyamide etc.In addition, also can use the core-sheath-type composite fibre or the parallel composite fiber that constitute by above-mentioned thermoplastic, polymeric materials.
In addition, as the fiber that forms ground floor 54 and the second layer 55, use the fiber in fact without heat-shrinkable or not thermal contraction below the heat shrink temperature of the fiber of the 3rd layer 56 of formation described later.
As the fiber that forms the 3rd layer 56, preferably use the heat-shrinkable fiber mainly being formed by thermoplastic, polymeric materials.And this fiber is used the fiber of the body behavior that demonstrates flexibility.As the example of this fiber, can list potential crimping property fiber.Potential crimping property fiber is can similarly process with the fiber that existing non-woven fabrics is used before being heated, and by the heating under set point of temperature, show spiral helicine curling, thereby there is the fiber of retractable property.By using potential crimping property fiber, can show heat-shrinkable and elastomer behavior simultaneously.
Potential crimping property fiber forms by for example take eccentric core-sheath-type composite fibre or the parallel composite fiber that two kinds of different thermoplastic, polymeric materials of shrinkage factor are composition.As its example, can list Unexamined Patent 9-296325 communique and specially permit the fiber of recording in No. 2759331 description.
From the easiness of fiber manufacture and make it show the viewpoint as the good sense of touch of the component parts of absorbent commodity, the fiber number that forms each fibrolaminar above-mentioned fiber of non-woven fabrics 50 is preferably 1.0-10dtex, is particularly preferably 1.8-4.0dtex.
As the form of aggregation that forms the fiber of ground floor 54, can list such as the fleece forming with combing method, the fleece forming by air lay method, by self thering is the fiber (binder fibre) of melt bonded property and non-melt bonded property fiber (fiber that fusing point is high), mix the overlapping aggregation of non-woven fabrics, non-woven fabrics and above-mentioned fleece that the melt bonded point separating the rear non-woven fabrics of fibre and form is few etc.When ground floor 54 is the fibroreticulate form forming with combing method, on non-woven fabrics, form bulk and be full of the protuberance that forms this fibroreticulate fiber, and this fiber is orientated along protuberance.Especially, if when the fleece that ground floor 54 use are formed by combing method forms, ground floor 54 becomes very sparse structure, can realize seeing through and keeping of high viscosity liquid.And compression when this ground floor 54 compresses on thickness direction is also improved.As full-bodied liquid, can list the cleaning agent that cleaning agent that soft stool or menses, human body use or wetting agent or object are used.
The fleece being formed by combing method or air lay method refers to the fiber assembly of the state before non-woven fabricsization.; the state of the processing of carrying out after the fleece chemical industry order that this fleece being formed by combing method or air lay method was also used when not implementing manufacturing non-woven fabrics; for example also do not implement the heating and melting adhesion process of hot blast method and hot-rolling (embossing) method, its be between fiber extremely loosely be wound around the fiber assembly of state.By the fleece being formed by combing method during for ground floor 54, when ground floor 54 and other fibrous layer engage or after it engages, make between the fiber in ground floor 54 heat fusing bonding or with solvent welding or it is mechanically interweaved.
The above-mentioned explanation that ground floor 54 is carried out is also applicable to the second layer 55.
The form of aggregation as forming the fiber of the 3rd layer 56, can list the fleece that (1) is contained potential crimping property fiber and utilized combing method to form; Or (2) as having the non-woven fabrics of heat-shrinkable, can list the non-woven fabrics that forms with heat fusing Method for bonding, with current interweave the non-woven fabrics that method forms, the non-woven fabrics forming with needle point method, the non-woven fabrics forming by solvent welding method, the non-woven fabrics forming with spun-bond process, with the non-woven fabrics of meltblown formation.Wherein, there is the non-woven fabrics of heat-shrinkable, refer to the non-woven fabrics with shrinkable character while heating under set point of temperature; Can also list the net that (3) have heat-shrinkable.
According to the sanitary towel 1 of above-mentioned the present embodiment, because a pair of side leakage barriers 5,5 has respectively retractility, so even make in the crooked Shi， of its skin along wearer side leakage barriers 5 also more difficult generation wrinkle dressing sanitary towel 1.
In addition, in the part of non-woven fabrics 50 doublings of side leakage barriers 5, in relative face, although the protuberance 53 ' in the protuberance in a face 50a 53 and another face 50a ' contacts, but protuberance 53,53 ' resiliency are improved, the stability of the three-dimensional shape of side leakage barriers 5 and dress comfort and further improve.
In addition, can obtain the effect same with above-mentioned embodiment.
The present invention (first invention) is not limited to above-mentioned embodiment, only otherwise departing from aim of the present invention just can carry out suitable change.
For example, also can be overlapping and form according to irregular relative mode of tool by 2 irregular bulk non-woven fabrics of tool in the sanitary napkin Zhong， side leakage barriers as absorbent commodity of the present invention.
In addition, in each embodiment, on the non-woven fabrics 50 that forms side leakage barriers 5, decentralized configuration has each independently protuberance 53, but non-woven fabrics also can be arranged in decentralized configuration on bulk non-woven fabrics, has recess.That is, it is roughly continuous that non-woven fabrics also can be arranged to protuberance, and the region of this protuberance is smooth in appearance.In addition, the protuberance 53 in non-woven fabrics can be positioned on the face of inner side of at least doubling, also can be arranged on the face in outside.In addition, the plan view shape at each embodiment Zhong， junction surface 52 is circular, except circle, can be also ellipse, triangle, rectangle or their combination etc.And junction surface 52 can be formed to wire such as straight line or curve of continuous shape, clathrate etc.In addition, a pair of side leakage barriers 5,5 preferably spreads all over the total length of absorbent main body 10, but also can at least spread all over the part relative with the excretory portion of wearer.
And then, in the sanitary napkin 1 of the absorbent commodity as the present invention's (the first invention), also can be as shown in Figure 6, the non-woven fabrics 50 that forms respectively a pair of side leakage barriers 5,5 extends from inner side, napkin width direction lateral, in this inner side, towards skin contact face one side, turn back, after the inner side edge portion 51 of its formation side, end leakage barriers of turning back, to napkin width direction outside, extend, in napkin width direction end, towards absorbed layer 11 1 sides, turn back.In addition, as shown in Figure 7, in sanitary napkin 1, a pair of alar part 6,6 can be distinguished the different parts of You Yu side leakage barriers 5 and form, and side leakage barriers 5 is fixed with back-sheet 3 after can be overlapping at sealing 8 places.In addition, sanitary napkin 1 also can not have a pair of alar part.
The present invention's's (the first invention) absorbent commodity can be sanitary napkin, can be also underwear back boxing, incontinence pad etc.
The part that in an above-mentioned embodiment, description thereof is omitted and only have the part that an embodiment has can suitable mutual utilization.
Below, the preferred embodiment of the absorbent commodity based on the second invention of the present invention describes with reference to accompanying drawing.
The absorbent commodity 1 of the present embodiment is sanitary napkin, as shown in Figure 8 and Figure 9, possess the absorbent main body 10 that there is the absorbed layer 11 of liquid retainability and the application of anti-leakage layers of liquid impermeability 12 and be in fact elongate shape, by a pair of side leakage barriers 5,5, covered the length direction both sides of skin contact face one side of absorbent main body 10.Absorbed layer 11 in sanitary towel 1 consists of the face sheet 2 of liquid permeability and the absorber 4 of liquid retainability, and application of anti-leakage layers 12 consists of the back-sheet 3 with breathability and liquid impermeability.
In addition, in the sanitary napkin 1 of the present embodiment, a pair of side leakage barriers 5,5 is respectively by having a large amount of embossed portion 52,52 ... side leakage barriers form sheet material 50 and according to the inner side of the width in absorbent main body 10, there is the mode of turning back end 51, Jiang Gai side leakage barriers form sheet material 50 go back to absorbent main body 10 width outside and form, the front end of the end 51 of turning back does not form embossed portion 52.
Below, the sanitary napkin 1 of the present embodiment (being also only called below sanitary towel) is described in further detail.Sanitary towel 1 is elongate shape, and its length direction is consistent with the length direction (below also referred to as principal length direction) of absorbent main body 10.Face sheet 2 and back-sheet 3 are respectively elongate shape, and its length direction is consistent with principal length direction.Absorber 4 is elongate shape, and its length direction is consistent with principal length direction, and is clamped and fastened between face sheet 2 and back-sheet 3.The width of the width of face sheet 2 and absorber 4 is roughly the same, forms narrowlyer than the width of back-sheet 3.Face sheet 2 covers the whole surf zone of skin contact face one side of absorber 4.Face sheet 2 and back-sheet 3 are stretched out from the length direction two ends of absorber 4 respectively, in the place of its extension by heat seal, utilize bonding agent to carry out the known joint method such as bonding to be bonded with each other.
Below, a pair of side leakage barriers 5,5 in the sanitary towel 1 of the present embodiment is further illustrated.As shown in Figure 8, a pair of side leakage barriers 5,5 forms respectively elongate shape, and its length direction is consistent with principal length direction.A pair of side leakage barriers 5,5 spreads all over respectively between the both ends of principal length direction and configures.
As shown in Figure 9, a pair of side leakage barriers 5,5 engages with back-sheet 3 by the first sealing 8 in the side portion of absorbent main body 10 respectively.In a pair of side leakage barriers 5,5, side leakage barriers forms sheet material 50 and extends to the inner side of the width (being also only called below body width direction) of absorbent main body from the side portion of absorbent main body 10, and as the mode of the inner side edge portion of the end 51 of turning back, towards absorbed layer 11, go back to the outer rear flank of body width direction according to formation, towards the outside of body width direction, extend.The leading section that the side leakage barriers of turning back forms sheet material 50 engages with face sheet 2 at second sealing 9 places of extending along principal length direction.Between the second both ends of sealing 9 across principal length direction, form.The first sealing 8 and the second sealing 9 respectively can be by heat seals, utilize bonding agent to carry out the known joint method such as bonding forms.
In side leakage barriers 5, than the second sealing 9, more by the part of body width direction inner side, preferably do not engage with face sheet 2.In addition, at the both ends of principal length direction, the side leakage barriers of turning back forms inner side edge portion 51 in sheet material 50 and the part between the second sealing 9 and preferably spreads all over roughly whole or engage (not shown) with face sheet 2 near inner side edge portion 51.
The sheet material 50 of ，Dui side leakage barriers formation below further illustrates.
As shown in Fig. 9 and Figure 10 (a), it is stacked by 5 non-woven fabrics that side leakage barriers forms sheet material 50, Bing Youqi both sides pattern is according to the rules by a large amount of embossed portion 52,52 ... engage integrated and form, non-embossed portion is by forming embossed portion 52,52 ... and swell laterally, formed a large amount of protuberance 53,53 ...
The outer surface of side leakage barriers 5 is formed by an outermost non-woven fabrics 54a, and the inner surface of side leakage barriers 5 is formed by another outermost non-woven fabrics 54b.
Three layers of non-woven fabrics 55a, 55b of the internal layer between two outermost non-woven fabrics 54a, 54b, at least one deck in 55c preferably have retractility on the width (being also only called below body width direction) of absorbent main body.In the present embodiment, the central internal layer non-woven fabrics 55b that is positioned at stacked non-woven fabrics has retractility.
In the present embodiment, two outermost non-woven fabrics 54a, 54b and internal layer non-woven fabrics 55a, the 55c adjacent with this two non-woven fabrics 54a, 54b swell laterally due to the contraction of internal layer non-woven fabrics 55b respectively.
Side leakage barriers forms in sheet material 50, and as shown in Figure 8, embossed portion 52 is configured to so-called jagged pattern, and each embossed portion 52 is elongate shape to overlook the oval length direction that forms discontinuously ，Yan sanitary towel 1 respectively.That is, the long axis direction of elliptical shape is roughly consistent with the length direction of sanitary towel 1.Other position that embossed portion 52 is compacted in ，Yu side leakage barriers formation sheet material 50 is compared, and it is large that less thick and density become.
In two outermost non-woven fabrics 54a, 54b, the non-embossed portion beyond embossed portion 52 forms convex.; side leakage barriers forms sheet material 50 when overlooking; the non-embossed portion between embossed portion 52 of two outermost non-woven fabrics 54a, 54b (specifically; Si Ge bight has the essentially rectangular part of embossed portion 52) formation convex (semicircle is spherical); thus, formed a large amount of protuberance 53,53 ...In addition, in the present embodiment, with two outermost non-woven fabrics 54a, 54b respectively the part beyond the embossed portion 52 in adjacent internal layer 55a, 55c also form convex.
In the inside of each protuberance 53, non-woven fabrics 55a, 55b, the 55c interface separately of two outermost non-woven fabrics 54a, 54b, internal layer do not engage, at least separately local.
Thereby from improving the three-dimensional raising anti-leakage of side leakage barriers 5, the viewpoint that simultaneously obtains the good wearing comfort of side leakage barriers 5 is set out, the height T (with reference to Figure 10 (a)) that side leakage barriers forms the protuberance 53 in sheet material 50 is preferably 0.1-1mm, is particularly preferably 0.2-0.5mm.In addition, with the height T of protuberance 53 of inner surface one side and the height T of the protuberance 53 of outer surface one side on embossed portion 52Wei border
1, from obtaining the viewpoint of buffering sense and surperficial smooth touch, preferred T compares T
1high or equal.
Here, the height T of protuberance 53 for example measures as follows.First, the length cutting out in length and breadth on the sheet material 50 of leakage barriers formation is from the side big or small test film more than 10mm * 10mm.Then, use by the line of embossed portion 52 and protuberance 53 and make cutting plane.With microscope, (KEYENCE Co., Ltd. manufactures, and VH-8000) obtains the enlarged photograph of this section.According to the ratio of enlarged photograph, measure the height T (with reference to Figure 10 (a)) of from protuberance 53 top to bottom (upper surface of adjacent embossed portion 52).Height T preferably measures the part (an inner surface 50a of side leakage barriers 5) that the side leakage barriers of stretching out to the inner side of body width direction from the side of absorbent main body 10 forms sheet material 50.The part (another inner surface 50b of side leakage barriers 5) that the side leakage barriers of turning back forms sheet material 50 also has situation about being bonded together with face sheet 2 etc., is not preferred for highly measurement.In addition, preferably, before measuring section, use the KES-G5HANDY-TYPE COMPRESSION TESTER (KATO TECH Corporation) of KES measuring system, in advance detect thickness T
0(0.5g/cm
2thickness under load), confirm thickness T
z(with reference to Figure 10 (a)) is thickness T
090-110%, if lower than 90% or be more than 140%, position is measured in conversion, 110-130% if, by specimen holder in 2 plates to adjust after thickness, by enlarged photograph measuring height T.
In side leakage barriers, form in sheet material 50, the viewpoint from a large amount of protuberance 53 is formed with appropriate height and resiliency, the easy bending of side leakage barriers 5 simultaneously or bending, the major axis of embossed portion 52 and the Length Ratio of minor axis are preferably 1: 1-3: 1, be particularly preferably 3: 2-2: 1.
In addition, the reason based on same, the interval of distance between immediate embossed portion 52 (in interval) is in the heart preferably 1-5mm in principal length direction, is particularly preferably 2-3mm, in body width direction, is preferably 1-10mm, is particularly preferably 2-8mm.In addition, according to the difference of the configuration of embossing, in interval be not in the heart likely length direction and width yet, therefore principal length direction and body width direction are hypothetically to set length direction line and the width line connecting between embossing sometimes, by the interval between this imaginary line and distance immediate embossed portion 52 center, obtain.
The protuberance 53 with said structure has restoring force for shriveling the such compression stress of this protuberance, so also can maintain its three-dimensional shape when dressing sanitary towel.
As shown in figure 11, in the side of deployed condition leakage barriers, form on sheet material 50 and be provided with the unassembled non-embossed area Q of multi-layer nonwoven fabrics 54a, 54b, 55a, 55b, 55c that there is Rack along principal length direction and form this sheet material 50 in body width direction.
Particularly, from forming the three-dimensional viewpoint highly of the buffering Gan He side leakage barriers 5 of inner side edge portion 51, the width of non-embossed area Q in body width direction is preferably 1-15mm, is particularly preferably 2-10mm.In addition, the viewpoint of easily turning back is calmly set out, and is preferably formed longlyer than the distance of the width between above-mentioned embossed portion 52.
In addition, in the side of deployed condition leakage barriers, form in sheet material 50, as shown in figure 11, a large amount of embossed portion 52,52 ... preferably with respect to imaginary line L, being line symmetry respectively forms.Equally, the protuberance 53,53 of non-embossed portion ... also preferably with respect to imaginary line L, being line symmetry respectively forms.Preferably, at least to form sheet material 50 when imaginary line L turns back in side leakage barriers, between the protuberance 53 of non-embossed portion, the mode of local contact has formed embossed portion 52,52 ...
Therefore, because side leakage barriers 5 Shi You side leakage barriers form sheet materials 50, at imaginary line L, turn back and form, so form on relative inner surface 50a, the 50b of sheet material 50 in the side leakage barriers of turning back, as shown in Fig. 9 and Figure 10 (a), contact between the protuberance 53 of non-embossed portion.Figure 10 (a) is the partial enlarged drawing of the circles mark A in Fig. 9.
Here, so-called contact refers to following state: at least any one mode with distortion in the protuberance 53 on an inner surface 50a of side leakage barriers 5 or the protuberance 53 on another inner surface 50b, contact, and while overlooking, the section overlaid of protuberance.Protuberance 53 is stacked and form by multi-layer nonwoven fabrics, for distortion, has elasticity.Therefore, the three-dimensional shape of side leakage barriers 5 is to consist of the contact condition with distortion between protuberance 53, and the distortion for the side leakage barriers 5 from outside, has the restoring force that elasticity produces, thereby has the stability of three-dimensional shape.
From making the stable viewpoint of three-dimensional shape of side leakage barriers 5, the equitant ratio of section of protuberance 53 is preferably 10-90%, is particularly preferably 20-80%.Here, the equitant ratio of the section of protuberance 53 refers to, the ratio that the section of a protuberance 53 in two protuberances 53 of contact and the section of another protuberance 53 are overlapping.That is,, if the section of a protuberance 53 is all overlapping with the section of another protuberance 53, the equitant ratio of the section of protuberance 53 is 100%.When the area of section of a protuberance 53 is different with the area of section of another protuberance 53, the protuberance that in this section, area is larger 53 is set as to a protuberance.
The measurement of the area of section of protuberance 53 is carried out as follows.
The protuberance first, is here as given a definition.
With and the same step of above-mentioned height T and measuring method obtain the height H of the bump between embossed portion and the embossed portion adjacent with this embossed portion
1(not shown).Now, in the situation that can be not by the protuberance 53 top of swelling most to carrying out a plurality of measurements between embossed portion, will in measurement result, swell the minimum height H that is set as
1.Than this height H
1outstanding position is set as protuberance.
Then, measure as described below the area of section of protuberance.The area of section of protuberance 53 is supposition height H
1area while dissecing protuberance 53.
First, with above-mentioned microscope, with 20-100 any multiplying power (selecting top to shine the multiplying power of 5-10) doubly, take inner surface 50a, 50b that relative side leakage barriers the forms sheet material 50 plane photo separately row image of going forward side by side and preserve (necessary words are printed).Then, on plane photo, record from the line (being set as below top-embossed portion line) of extremely adjacent with this protuberance embossed portion in the top of each protuberance.
Then, be conceived to certain protuberance 53, cutting plane is measured.The measurement of cutting plane must be carried out for all embossed portion adjacent with raised part.The quantity of the embossed portion adjacent with raised part is preferably more than 3.Each is measured and carries out as follows: use and obtained above-mentioned height H
1cutting plane, on this cutting plane, record represents height H
1line (H
1line), obtain from H
1on line, be equivalent to the position at top to the length of the profile of protuberance, according to the meansigma methods of these length, be reflected to the result demonstration on plane photo, the profile of protuberance is circular or oval, by this circle or the oval area of section that is set as protuberance.
Protuberances all in plane photo is carried out to same operation.
The section of protuberance overlapping is the skin contact Mian Yice side leakage barriers that stretches out the inner side of subtend body width direction form the plane photo of the inner surface 50a in sheet material 50 and form the plane photo of the inner surface 50b in sheet material 50 and measure in the area of section of the protuberance of this record in the area of section of the protuberance of this record and the non-skin contact Mian Yice side leakage barriers of turning back by being reproduced in state that inner side edge portion 51 turns back.In order to reproduce overlap condition, use, in a plane photo, the area of section of another transparent or semitransparent protuberance is reflected to the method on film; Utilize the layer structure of software to make the overlapping method of the area of section of protuberance etc., for example, with image analysis software (the NEW QUBE ver.4.22 of NEXUS system), measure the area of overlapping portion.By the area of section (area of section the greater) of the area of the overlapping portion obtaining and the protuberance of plane photo, measured the equitant ratio of section of protuberance 53.
In addition, between inner side edge portion 51 and the second sealing 9, between relative inner surface 50a, the 50b of side leakage barriers 5 all protuberances 53 separately, can not contact yet.Overlapping by between near the protuberance 53 inner side edge portion 51, inner surface 50a and another inner surface 50b easily separate, thereby can form discontiguous part between protuberance 53.Forming the buffering sense that such part of separating can improve side leakage barriers 5, is preferred from this viewpoint.
The inner side edge portion 51 of ，Jiu side leakage barriers 5 further illustrates below.
The inner side edge Bu51You side leakage barriers of side leakage barriers 5 forms sheet material 50 and turns back and form at above-mentioned non-embossed area Q.Inner side edge portion 51 has formed the free end of the body width direction inner side of side leakage barriers 5, and linearly extension in principal length direction.
From forming the viewpoint of three-dimensional barrier, preferably inner side edge portion 51 separates with face sheet 2.In addition, for inner side edge portion 51, owing to by forming groove 7 described later, face sheet 2 being absorbed in around groove 7, so side leakage barriers 5 increases with respect to the three-dimensional degree of face sheet 2, can effectively prevent the body fluid of coming at face sheet 2 upper reaches from body width direction inner side towards side shifting.
Skin contact face one side of the outer surface You sanitary towel 1 of inner side edge portion 51 forms with the non-woven fabrics that the outermost layer non-woven fabrics 54a of the face of skin contact face one side of formation side leakage barriers 5 is connected continuously.
The front end that forms the end of turning back of sheet material 50 in side leakage barriers portion is not form embossed portion 52 on the outer surface of inner side edge portion 51.That is, the outer surface of inner side edge portion 51 is only formed by the protuberance 53 of non-embossed portion.
An outermost non-woven fabrics 54a of the front end of formation inner side edge portion 51, as shown in Figure 10 (b), has the shape that becomes convex towards the inside bend of body width direction.Equally, adjacent with outermost non-woven fabrics 54a internal layer non-woven fabrics 55a also has the shape that bends to slightly convex towards the inner side of body width direction.Figure 10 (b) is the partial enlarged drawing of the circles mark B in Fig. 9.
Like this, the front end of inner side edge portion 51 is round and smooth, has resiliency, and wearing comfort is good.
In addition, the inner surface of inner side edge portion 51 is by forming with the continuous connected non-woven fabrics of non-woven fabrics 54b that forms respectively relative inner surface 50a, the 50b of side leakage barriers 5.
Another outermost non-woven fabrics 54b of the inner surface of formation inner side edge portion 51 is as shown in Figure 10 (b), outstanding towards the outside of body width direction.Equally, adjacent with outermost non-woven fabrics 54b internal layer non-woven fabrics 55c also has towards the outstanding slightly shape in the outside of body width direction.
Like this, the end of turning back is that the inner surface of inner side edge portion 51 is as shown in Figure 10 (b), the non-woven fabrics 54b, the 55c that form inner surface one side of non-embossed portion give prominence to, therefore when dressing sanitary towel, inner side edge portion 51 is not easy to be flattened, and can maintain the circular shape of the front end of above-mentioned inner side edge portion 51.
As shown in Figure 8, in above-mentioned side leakage barriers 5, be formed with the row of a large amount of protuberance 53 and embossed portion 52 alternative arrangements.Although it is stacked and form by multi-layer nonwoven fabrics that side leakage barriers forms sheet material 50, by a large amount of embossed portion 52 easily crooked or bending that becomes is set.Side leakage barriers forms the above-mentioned row that sheet material 50 is particularly arranged along a plurality of embossed portion 52 partition distance, can be easily crooked.Specifically, embossed portion 52 is own harder than protuberance 53 owing to being compacted, and is therefore the position that is difficult to bending, but near the thickness at the position embossed portion in protuberance 53 52 is smaller, easily bending.Ji， side leakage barriers forms the easy surrounding's bending along embossed portion 52 of sheet material 50.
In addition, while making its skin along wearer crooked in wearing sanitary towel 1, due to same reason, so be not easy to form on sheet material 50 and produce wrinkle in side leakage barriers.Therefore, side leakage barriers 5 is not easy to produce the wrinkle extending along body width direction, prevents that liquid is towards the function admirable of this direction seepage.
From obtaining the viewpoint of good anti-leakage and wearing comfort, a pair of side leakage barriers 5,5 width separately preferably has size as described below.In the part of a pair of alar part 6,6 of being provided with of principal length direction, on the length direction centrage of this alar part 6, in body width direction along the surface measurements of side leakage barriers 5 to the first sealing 8 and the length between the ora terminalis of inner side edge portion 51 1 sides be preferably 10-30mm, be particularly preferably 15-25mm.
In addition, the length that forms sheet material 50 fold back portion along the surface measurements Dao side leakage barriers of side leakage barriers 5 in body width direction is preferably 70-100% with respect to the above-mentioned width of side leakage barriers 5, be particularly preferably 85-95%, reason based on same and from the viewpoint of easy formation the first sealing 8, more than being preferably at least 10mm.
Thereby from improving the three-dimensional raising anti-leakage of side leakage barriers 5, the viewpoint that simultaneously obtains the good wearing comfort of side leakage barriers 5 is set out, and the mass area ratio that side leakage barriers forms sheet material 50 is preferably 20-100g/m
2, be particularly preferably 25-50g/m
2.
The mensuration of mass area ratio is for example measured as follows.Side leakage barriers is formed to sheet material 50 severings and become size more than 10mm * 10mm, preferably severing becomes that in big or small ，Cong Yige sanitary towel more than 30mm * 30mm, to intercept the gross area be 250mm
2above test piece, measures the weight of this test piece with the minimum electronic balance that is shown as 1mg, convert and obtain mass area ratio.In order to improve the mensuration precision of mass area ratio, preferably from a plurality of sanitary towels intercepting test piece, obtain the meansigma methods of 5 above measured values.
Below, the sanitary towel 1 of the present embodiment is further illustrated.As shown in Figure 9, have a pair of alar part 6,6 stretching out from the dual-side of the length direction of absorbent main body 10, this pair of alar part 6,6 forms sheet material 50 by the side leakage barriers of stretching out from absorbent main body 10 respectively and forms.
A pair of alar part 6,6 forms sheet materials 50 with the side leakage barriers 5 You Yizhang side leakage barriers of phase the same side of principal length direction respectively and forms, and the middle section of the side of the length direction of leakage barriers 5 stretches out laterally from the side.
Yi Zhang side leakage barriers forms sheet material 50 and take the first sealing 8 and as border, be divided into side leakage barriers 5 and alar part 6.A pair of alar part 6,6 forms sheet material 50 by side leakage barriers respectively and forms, and easily the edge part along panty crotch bends.
On a face of side leakage barriers formation sheet material 50 that forms respectively a pair of alar part 6,6, be provided with for the alar part 6 of the edge part bending along panty crotch being fixed on to the adhesive layer (not shown) of the outer surface of this underwear.
As shown in Figure 9, a pair of side leakage barriers 5,5 engages with back-sheet 3 at the first sealing 8 places of the length direction dual-side portion of absorbent main body 10 respectively.The shape of the first sealing 8 has the shape of tightening up to body width direction inner side at the central part of length direction, make when the alar part 6 arranging is continuously during along the edge part bending of panty crotch, alar part 6 easily and the edge part of this panty crotch identical.
In addition, in skin contact face one side of the absorbent main body 10 in ， sanitary towel 1, be provided with groove 7 as shown in Figure 8.This groove 7 is by principal length side, upwardly extending a pair of embossing groove and the 2 circular-arc laminations flower grooves that extend along body width direction at the both ends of the length direction of this embossing groove form.In addition, in principal length side, upwardly extending a pair of above-mentioned embossing groove has respectively the shape of tightening up to the inside.By groove 7, face sheet 2 and absorber 4 engage.As shown in Figure 9, the inner side edge portion 51 of side leakage barriers 5 is located in the outside of groove 7.
Below, the material that just forms the sanitary towel 1 of the present embodiment describes.
First, just forming two outermost non-woven fabrics 54a, the 54b of side leakage barriers formation sheet material 50 and the formation material of internal layer non-woven fabrics describes in detail.
As formation, be positioned at the non-woven fabrics of outermost layer non-woven fabrics 54a of the outer surface of side leakage barriers 5, preferably use the various non-woven fabrics such as hot blast method non-woven fabrics, Nonwovens of spunbond, meltblown non-woven fabrics and jet net-spraying method non-woven fabrics that obtain such as the heat fusing bonded mat of being manufactured by combing method is carried out to hot blast processing.As the associated methods of the fiber in these non-woven fabrics, from obtaining the viewpoint of good wearing comfort, preferably can not make the small and dense degree in other position of the Thickness Ratio method larger than other position of its binding site.For example, can use and utilize the combination of binding agent or pass through the bonding combination of heat fusing.In addition, replace the combination of fiber, also can resemble the mechanical complexation that utilizes fiber jet net-spraying method non-woven fabrics etc.For three-dimensional sheet being realized significantly to smooth skin sense of touch and flexibility, as non-woven fabrics, most preferably use the heat fusing bonded mat being obtained by combing method carried out to hot blast processing, and under the condition that does not apply strong compression non-woven fabrics and the hot blast method non-woven fabrics that obtains.
From making skin contact face one side of side leakage barriers 5 there is good wearing comfort, and skin contact face one side of inner side edge portion 51 viewpoint round and smooth and that have a resiliency is set out, the mass area ratio of non-woven fabrics that forms the non-woven fabrics 54a of the outer surface that is positioned at side leakage barriers 5 is preferably 5-30g/m
2, be particularly preferably 12-20g/m
2.
As the non-woven fabrics with the internal layer of retractility, use and adopt separately or combine the non-woven fabrics that adopts hot blast method, spun-bond process, meltblown to obtain, thereby can use, in hot-melt-bondable fiber, mix the formation that non-melt bonded property fiber reduces the quantity of the melt bonded point between fiber; Form foldable structure and make folding top local engagement and the formation that obtains; By showing that the resin of elastic behavior forms the formation that the fiber of binding site forms etc.
In addition,, as the internal layer non-woven fabrics with retractility, also preferably use the non-woven fabrics of recording in the description of JP 2002-187228 communique for example.
In addition, as be positioned at side leakage barriers 5 inner surface outermost layer non-woven fabrics 54b and do not there is the internal layer non-woven fabrics of retractility, can use with no particular limitation known non-woven fabrics in the past.Can be according to the specific purposes of three-dimensional sheet and the suitable choice for use of purposes such as the heat fusing bonded mat of being manufactured by combing method being carried out to the various non-woven fabrics such as hot blast method non-woven fabrics, Nonwovens of spunbond, meltblown non-woven fabrics, jet net-spraying method non-woven fabrics and needle point method non-woven fabrics that hot blast processing obtains.Associated methods as the fiber in these non-woven fabrics, is not particularly limited, and for example, can use and utilizes the combination of binding agent or pass through the bonding combination of heat fusing.In addition, replace the combination of fiber, also can resemble the mechanical complexation that utilizes fiber jet net-spraying method non-woven fabrics etc.For three-dimensional sheet being realized significantly to smooth skin sense of touch and flexibility, as non-woven fabrics, most preferably use the heat fusing bonded mat being obtained by combing method carried out to hot blast processing, and under the condition that does not apply strong compression non-woven fabrics and the hot blast method non-woven fabrics that obtains.
From inner side edge portion 51 being not easy be flattened and obtaining the viewpoint of good wearing comfort, the mass area ratio of above-mentioned non-woven fabrics is preferably 5-30g/m
2, be particularly preferably 10-20g/m
2.
From guaranteeing that side leakage barriers forms the viewpoint of the intensity of sheet material 50, the preferred formation that side leakage barriers forms sheet material 50 can list for example following formation: use hot blast method non-woven fabrics as an outermost non-woven fabrics 54a, use SMS (spin SMS-spunbond) non-woven fabrics as another outermost non-woven fabrics 54b, use the hot crimpiness fibrous layer of recording in the description of JP 2002-187228 communique as the internal layer non-woven fabrics 55b with retractility, use SMS non-woven fabrics as internal layer non-woven fabrics 55a, the 55c without retractility.
In addition,, as the formation material of face sheet 2, back-sheet 3 or absorber 4, can use with no particular limitation the various materials that in the past used in the absorbent commodities such as sanitary napkin.
According to the sanitary napkin 1 of above-mentioned the present embodiment, simple in structure, and the excellent in stability of wearing comfort and three-dimensional shape.In addition, side leakage barriers 5 is due to the skin contact with wearer by its protuberance 53, so skin sense of touch is good.
In addition, side leakage barriers 5 and alar part 6 You Yizhang side leakage barriers form sheet material 50 and form, and its manufacture becomes easy as described below like that.
Below, according to the example of the preferable production process of above-mentioned sanitary napkin, with regard to the manufacture method of absorbent commodity of the second invention of the present invention, with reference to accompanying drawing, describe.
As preferably the first example of manufacturing sanitary towel of the present invention, can list for example following method.
The first example of the manufacture method of sanitary towel 1 is, in the manufacture method of side leakage barriers 5, first, the non-woven fabrics 55 in internal layer configuration with retractility, then stacked 3 non-woven fabrics 54a, 54b, 55, then, the internal layer non-woven fabrics 55 with retractility is extended, under the state extending at this non-woven fabrics 55, along the direction setting vertical with this prolonging direction not by 3 non-woven fabrics 54a, 54b, the 55 non-embossed area Q that engage, simultaneously by 3 stacked non-woven fabrics 54a, 54b, 55 by a large amount of embossed portion 52, 52 ... engage integrated, then remove the elongation state of internal layer non-woven fabrics 55, be made into side leakage barriers and form sheet material 50, then, side leakage barriers is formed to sheet material 50 turns back at non-embossed area Q, be made into side leakage barriers 5.
In addition, in sanitary towel's 1 Zhong， side leakage barriers of above-mentioned the present embodiment, form sheet material 50 stacked and form by 5 non-woven fabrics, but it is stacked and form by 3 non-woven fabrics in this example Zhong， side leakage barriers, to form sheet material 50.
Below, with regard to the manufacture method of the sanitary towel 1 of this example, further illustrate.
First, according to the absorbent main body 10 shown in conventional method construction drawing 8 and Fig. 9, it has face sheet 2, back-sheet 3 and the absorber between two sheet materials 4.
Then in the manufacture method of ， side leakage barriers 5, first, prepare to have the non-woven fabrics 55 of a lengthwise rectangular shape of retractility and 2 identical shaped non-woven fabrics 54a, 54b.Then, in internal layer configuration, there is the non-woven fabrics 55 of retractility, as shown in Figure 12 (a), stacked 3 non-woven fabrics 54a, 54b, 55.The direction mode consistent with the direction being stretched described later that non-woven fabrics 55 preferably has retractility according to it is configured.3 non-woven fabrics 54a, 54b, 55 shape are identical, and its gravel size decision has can form the side leakage barriers 5 of sanitary towel 1 and the size of alar part 6.
Then, as shown in Figure 12 (b), by the internal layer non-woven fabrics 55 with retractility along the direction vertical with its length direction from two side stretchings and by its elongation.Then, extending under the state of non-woven fabrics 55, along the direction (below also referred to as direction D2) vertical with this prolonging direction (below also referred to as direction D1), as shown in Figure 11, both ends across the length direction of non-woven fabrics 55 arrange not by 3 non-woven fabrics 54a, 54b, the 55 non-embossed area Q that engage, simultaneously by stacked 3 non-woven fabrics 54a, 54b, 55 as shown in Figure 12 (c), by a large amount of embossed portion 52,52 ... engage integrated.
On the width of stacked non-woven fabrics, the location optimization that forms non-embossed area Q is set in the following manner: the side leakage barriers that can guarantee respectively deployed condition in the both sides of this non-embossed area Q forms the width of sheet material 50 and the width of alar part 6.
A large amount of embossed portion 52,52 ... preference is as being configured to as shown in Figure 11 zigzag.In addition, each embossed portion 52 preferably forms elongate shape on direction D1.In addition, a large amount of embossed portion 52 is preferably line with respect to the imaginary line L non-embossed area Q roughly being divided equally along direction D2 and forms symmetrically.For example heat seal is preferably used in embossing processing.
Then, remove the elongation state of internal layer non-woven fabrics 55, as shown in Figure 12 (d), make and there is a large amount of protuberance 53,53 ... the side leakage barriers of lengthwise form sheet material 50.By the contraction of the internal layer non-woven fabrics 55 that extends, two outermost layer non-woven fabrics 54a, 54b be protuberance laterally respectively, and each protuberance 53 is formed on side leakage barriers and forms on sheet material 50 two sides.Similarly make again Yi Ge side leakage barriers and form sheet material 50.
Then an end edge portion that, by heat seal, a pair of side leakage barriers of making is as mentioned above formed to sheet material 50,50 width separately engages with the dual-side portion of the face sheet 2 of absorbent main body 10.
Then, side leakage barriers is formed to sheet material 50 according to having a large amount of protuberance 53,53 ... the relative mode of face 50a, 50b towards top, at imaginary line L, go back to the width outside of absorbent main body 10, a protuberance 53 in inner surface 50a is contacted with the protuberance 53 in another inner surface 50b.A pair of side leakage barriers forms the part of another ora terminalis side of sheet material 50,50 width separately and stretches out laterally from the dual-side of the length direction of absorbent main body 10.
In addition, by heat seal, a pair of side leakage barriers of the state turning back as mentioned above being formed to sheet material 50,50 and absorbent main body 10 engages along the side portion of absorbent main body 10, simultaneously, at the both ends of the length direction of absorbent main body 10, with bonding agent, a pair of side leakage barriers is formed to sheet material 50,50 and face sheet 2 bonding.
In addition, absorbent main body 10He side leakage barriers is formed to the profile that sheet material 50 profile separately cuts into regulation, when making side leakage barriers 5, make alar part 6, obtain the sanitary towel 1 of the second invention of the present invention.
In this above-mentioned example, be to make singly sanitary towel 1, but also preferably use the side leakage barriers formation sheet material of strip and the absorbent main body of strip, make continuously sanitary towel.As the above-mentioned side leakage barriers that forms strip, form the non-woven fabrics grey cloth of the strip of sheet material, preferably use the non-woven fabrics with rolled state keeping of making in addition.When the volume of curling non-woven fabrics reduces, preferably recover the volume of curling non-woven fabrics grey cloth, with the non-woven fabrics grey cloth that has recovered volume, make side leakage barriers and form sheet material.
As the method for recovering the volume of curling non-woven fabrics with hot blast, there is the method for recording in the description of JP 2004-137655 communique for example.
In addition, when the internal layer non-woven fabrics 55 with retractility extends 20% on it has the direction of retractility, the elongation recovery rate of (100mm being elongated to the state of 120mm) is preferably more than 3%, is particularly preferably more than 5%.The desired retractility of non-woven fabrics 55 is so not high.
Above-mentioned elongation recovery rate is measured according to for example following method.The Compression and Expansion tester TENSILON " RTA-100 " that uses ORIENTEC company to produce measures according to stretch mode.First, non-woven fabrics 55 is cut into and has in the direction of retractility for size that 70mm * direction vertical with this direction is 50mm is with acquisition test piece.Between the air spider being installed on Compression and Expansion tester, make the direction between this air spider consistent with the direction with retractility of non-woven fabrics 55, according to making initial specimen length (distance between chuck) test piece is set for 50mm, make to be arranged on chuck on the force cell (the specified 5kg of being output as) of Compression and Expansion tester with the speed rising of 100mm/ minute, test piece is extended.When test piece has been extended 20% of initial specimen length, when having extended 10mm, make the moving direction of chuck reverse, and chuck is declined with the speed of 100mm/ minute, get back to the position of initial specimen length.According to the operation during this, the relation between the detected load of force cell and the elongation of test piece for record in chart, is obtained and is extended recovery rate (%) by following formula according to this chart.
Extend recovery rate=recovery elongation/maximum elongation length (=10mm) * 100
Wherein, recover elongation and be defined as, from maximum elongation length (=10mm), chuck is declined, be recorded at first and load while being zero, the distance that chuck moves from maximum elongation length.
Below, the preferable production process as the of the present invention second sanitary towel of inventing, describes the second example.The place that the second example be there is no to special instruction, can the suitable applicable detailed description to the first example.
In the manufacture method of the second example Shi， side leakage barriers 5 of the manufacture method of sanitary towel 1, first, in two outermost layer configurations, there is non-woven fabrics 54a, the 54b of retractility, then stacked 3 non-woven fabrics 54a, 54b, 55.Having the direction mode consistent with the direction being stretched described later that non-woven fabrics 54a, the 54b of retractility preferably have retractility according to it is configured.Then, extend respectively two outermost non-woven fabrics 54a, 54b, extending this non-woven fabrics 54a, under the state of 54b, along the direction D2 vertical with this prolonging direction D1, arrange not by 3 non-woven fabrics 54a, 54b, the 55 non-embossed area Q that engage, simultaneously, by a large amount of embossed portion 52, 52 ... by 3 stacked non-woven fabrics 54a, 54b, 55 engage integrated, then remove two outermost layer non-woven fabrics 54a, 54b elongation state separately, be made into side leakage barriers and form sheet material 50, then, side leakage barriers is formed to sheet material 50 turns back at non-embossed area Q, be made into side leakage barriers 5.
Below, with regard to the manufacture method of the sanitary towel 1 of this example, further illustrate.
In the manufacture method of side leakage barriers 5, first, prepare to have non-woven fabrics 54a, the 54b of 2 lengthwise rectangular shapes of retractility and 1 identical shaped non-woven fabrics 55.Then, in two outermost layer configurations, there is non-woven fabrics 54a, the 54b of retractility, as shown in Figure 13 (a), stacked 3 non-woven fabrics 54a, 54b, 55.
Then, as shown in Figure 13 (b), two outermost non-woven fabrics 54a, the 54b with retractility are extended to same degree along the direction vertical with its length direction from two side stretchings respectively.Then, extending under the state of non-woven fabrics 54a, 54b, along the direction D2 vertical with this prolonging direction D1, as shown in Figure 11, both ends across the length direction of non-woven fabrics 54a, 54b arrange not by 3 non-woven fabrics 54a, 54b, the 55 non-embossed area Q that engage, meanwhile, by stacked 3 non-woven fabrics 54a, 54b, 55 as shown in Figure 13 (c), by a large amount of embossed portion 52,52 ... engage integrated.
Then, remove the elongation state of two outermost non-woven fabrics 54a, 54b, as shown in Figure 13 (d), make and there is a large amount of protuberance 53,53 ... the side leakage barriers of lengthwise form sheet material 50.By the two outermost layer non-woven fabrics 54a that extend, the contraction of 54b, the non-woven fabrics 55 of internal layer shrinks, and forms wrinkle 55a, 55b on non-woven fabrics 55.Then, similarly make again Yi Ge side leakage barriers and form sheet material 50.
Then, with above-mentioned this example similarly, when making side leakage barriers 5, make alar part 6, obtain the sanitary towel 1 of the second invention of the present invention.
The side leakage barriers of the sanitary towel 1 being made by this example forms sheet material 50 as shown in Figure 13 (d), by 3 non-woven fabrics 54a, 54b, 55 stacked and by a large amount of embossed portion 52,52 ... engage integrated and form.
The internal layer non-woven fabrics 55 of the protuberance 53 of non-embossed portion has wrinkle 55a, 55b, non-woven fabrics 54a, the 54b adjacent with this non-woven fabrics 55 extrude laterally due to wrinkle 55a, 55b, and two outermost layer non-woven fabrics 54a, 54b swell laterally respectively Er side leakage barriers and form on sheet material 50 two sides and formed protuberance 53.
Describe in detail below.The internal layer non-woven fabrics 55 of protuberance 53 for example, as shown in Figure 13 (d), has wrinkle 55a, 55b, and a wrinkle 55a is side-prominent towards adjacent outermost layer non-woven fabrics 54a mono-, and another wrinkle 55b is side-prominent towards adjacent outermost layer non-woven fabrics 54b mono-.Two outermost non-woven fabrics 54a, 54b have respectively retractility, thereby easily swell laterally.
The present invention (second invention) is not limited to above-mentioned embodiment or example, only otherwise departing from aim of the present invention just can carry out suitable change.
For example, in the sanitary napkin as absorbent commodity of the present invention, the side leakage barriers of the present embodiment forms sheet material 50 and is formed by multiple non-woven fabrics, but also can be formed by a non-woven fabrics.For example, for bulk non-woven fabrics, also can, when forming a large amount of embossed portion by its one or both sides, form a large amount of protuberances.
In addition, the side leakage barriers of the present embodiment forms sheet material 50 and is formed by 5 non-woven fabrics, but also can be stacked by the non-woven fabrics below 5 or more than 5, and by a large amount of embossed portion 52,52 ... engage integrated and form.When side leakage barriers forms sheet material 50 and formed by 2 non-woven fabrics, non-woven fabrics swells laterally and forms protuberance 53.In addition, in the present embodiment, embossed portion 52 forms discontinuously, but the both ends that also can spread all over the length direction of side leakage barriers 5 form continuously.In addition, in the present embodiment, the plan view shape of embossed portion 52 is elliptical shapes, but except elliptical shape, can be also circle, triangle, rectangle or their combination etc.In addition, also embossed portion 52 can be formed to wire such as straight line or curve of continuous shape, clathrate etc.In addition, a pair of side leakage barriers 5,5 preferably spreads all over the total length of absorbent main body 10 and forms, but also can at least relative with the excretory portion of wearer part, form.
Moreover, in the first example, by 3 non-woven fabrics, form side leakage barriers and form sheet material 50, but also can form side leakage barriers by more than 2 or 3 non-woven fabrics, form sheet material 50.In addition, in the second example, by 3 non-woven fabrics, form side leakage barriers and form sheet material 50, but also can form side leakage barriers by 3 above non-woven fabrics, form sheet material 50.
Moreover sanitary napkin 1 also can not have a pair of alar part.
The present invention's's (the second invention) absorbent commodity can be sanitary napkin, but can be also underwear back boxing, incontinence pad etc.
The part that in an above-mentioned embodiment, description thereof is omitted and only have the part that an embodiment has can suitable mutual utilization.And the part that in an above-mentioned example, description thereof is omitted and only have the part that an example has can suitable mutual utilization.
Below, according to preferred embodiment, with regard to the of the present invention the 3rd absorbent commodity of inventing, with reference to accompanying drawing, describe.
As shown in Figure 14 and Figure 15, the absorbent commodity 1 of the present embodiment is sanitary napkin, possess the absorbent main body 10 that there is the absorbed layer 11 of liquid retainability and the application of anti-leakage layers of liquid impermeability 12 and be in fact elongate shape, by a pair of side leakage barriers 5,5, covered the length direction both sides of skin contact face one side of absorbent main body 10.Absorbed layer 11 in sanitary towel 1 consists of the face sheet 2 of liquid permeability and the absorber 4 of liquid retainability, and application of anti-leakage layers 12 consists of the back-sheet 3 with breathability and liquid impermeability.
In addition, in the sanitary napkin 1 of the present embodiment, a pair of side leakage barriers 5, 5 respectively by having a large amount of embossed portion 52, 52 ... side leakage barriers form sheet material 50 and there is the mode of turning back end 51 according to the width inner side in absorbent main body 10, Jiang Gai side leakage barriers form sheet material 50 go back to absorbent main body 10 width outside and form, embossed portion 52, 52 ... to the side leakage barriers of turning back, form respectively the relative inner surface 50a of sheet material 50, 50b mono-is side-prominent, embossed portion 52, 52 ... front end 56 separately forms plane, this plane part is by filming.
Below, the sanitary napkin 1 of the present embodiment (being also only called below sanitary towel) is described in further detail.Sanitary towel 1 is elongate shape, and its length direction is consistent with the length direction (below also referred to as principal length direction) of absorbent main body 10.Face sheet 2 and back-sheet 3 are respectively elongate shape, and its length direction is consistent with principal length direction.Absorber 4 is elongate shape, and its length direction is consistent with principal length direction, and is clamped and fastened between face sheet 2 and back-sheet 3.The width of the width of face sheet 2 and absorber 4 is roughly the same, forms narrowlyer than the width of back-sheet 3.Face sheet 2 covers the whole surf zone of skin contact face one side of absorber 4.Face sheet 2 and back-sheet 3 are stretched out from the length direction two ends of absorber 4 respectively, in the place of its extension by heat seal, utilize bonding agent to carry out the known joint method such as bonding to engage.
Below, a pair of side leakage barriers 5,5 in the sanitary towel 1 of the present embodiment is further illustrated.As shown in figure 14, a pair of side leakage barriers 5,5 forms respectively elongate shape, and its length direction is consistent with principal length direction.A pair of side leakage barriers 5,5 spreads all over respectively between the both ends of principal length direction and configures.
As shown in figure 15, a pair of side leakage barriers 5,5 engages with back-sheet 3 by the first sealing 8 in the side portion of absorbent main body 10 respectively.In a pair of side leakage barriers 5,5, side leakage barriers forms sheet material 50 and extends to the inner side of the width (being also only called below body width direction) of absorbent main body from the side portion of absorbent main body 10, and as the mode of the inner side edge portion of the end 51 of turning back, towards absorbed layer 11, go back to the outer rear flank of body width direction according to formation, towards the outside of body width direction, extend.The leading section that the side leakage barriers of turning back forms sheet material 50 engages with face sheet 2 at second sealing 9 places of extending along principal length direction.Between the second both ends of sealing 9 across principal length direction, form.The first sealing 8 and the second sealing respectively can be by heat seals, utilize bonding agent to carry out the known joint method such as bonding forms.
In addition, as shown in Figure 15 and Figure 16, in the side leakage barriers of turning back, form on relative inner surface 50a, the 50b of sheet material 50, the front end 56 of embossed portion 52 contacts with each other.
Sanitary towel's 1 Zhong， side leakage barriers formation sheet material 50 in the present embodiment is formed by non-woven fabrics.
In side leakage barriers 5, from the viewpoint of easy formation pocket portion, than the second sealing 9, more by the part of body width direction inner side, preferably do not engage with face sheet 2.In addition, at the both ends of principal length direction, the side leakage barriers of turning back forms inner side edge portion 51 in sheet material 50 and the part between the second sealing 9 and preferably spreads all over roughly whole or engage (not shown) with face sheet 2 near inner side edge portion 51.
The sheet material 50 of ，Dui side leakage barriers formation below further illustrates.
It is that a large amount of embossed portion 52,52 is set on non-woven fabrics that side leakage barriers forms sheet material 50 ... and form.The part that does not form embossed portion 52 in side leakage barriers 50 is the non-embossing part of non-woven fabrics.
， side leakage barriers forms in sheet material 50 as shown in figure 14, and embossed portion 52 is configured to so-called jagged pattern, and each embossed portion 52 forms discontinuously to overlook circle respectively.In embossed portion 52, the fiber of non-woven fabrics is compacted, and it is large that density becomes.
As shown in Figure 15 and Figure 16, by embossed portion 52Er side leakage barriers, form on sheet material 50 and formed recess 52a.This recess 52a is formed by the outer surface 50c mono-lateral inner surface 50a of leakage barriers 5 from the side, the non-woven fabrics that 50b mono-side is stretched out.On the outer surface 50c of recess 52a side leakage barriers 5, there is opening.Each recess 52a preferably has identical size.
Here, inner surface 50a, the 50b of the skin contact face one Ce Mian， side leakage barriers 5 of the outer surface 50cShi side leakage barriers 5 of side leakage barriers 5 are relative faces that the side leakage barriers of turning back forms sheet material 50.In addition, the outer surface 50c of side leakage barriers 5 is by turning back side leakage barriers formation sheet material 50 to make its part relative with face sheet 2.
Form as recess 52a, can list the shape of the taper that for example diameter cylindric, recess 52a increases gradually from outer surface 50c mono-lateral inner surface 50a, 50b mono-side, but the viewpoint from the stability of the three-dimensional shape of recess 52a, as shown in Figure 15 and Figure 16, the form of recess 52a is preferably the shape of the inverted cone that the diameter of recess 52a reduces gradually from outer surface 50c mono-lateral inner surface 50a, 50b mono-side.In the present embodiment, recess 52a has the shape of inverted cone-shaped.The front end 56 of recess 52a consists of the wall portion 57 that forms the bottom surface sections 56a of its outer surface and arrange continuously in the surrounding of this bottom surface sections 56a.The outer surface of bottom surface sections 56a is the inner surface 50a of side leakage barriers 5, a part of 50b.
From obtaining the good resiliency of side leakage barriers 5 and the viewpoint of smooth sense of touch, the opening diameter of the outer surface 50c of recess 52aZhong side leakage barriers 5 is preferably 1-5mm, is particularly preferably 1.5-3mm.
As shown in figure 17, the bottom surface sections 56a of recess 52a has round-shaped when overlooking, and forms tabular, and by filming.From obtaining the viewpoint of stability of the three-dimensional shape of side leakage barriers 5, by the part of filming, the area when overlooking bottom surface sections 56a is preferably 30-100% to bottom surface sections 56a, is particularly preferably 60-100%.In the present embodiment, bottom surface sections 56a is all by filming.
In this manual, filming refers to, there is softening (being preferably melting and solidification) in the resin that in the formation resin of the formation fiber of non-woven fabrics, at least fusing point is minimum, thereby forms the state that fiber is bonded into film like, by the part optimum fiber shape of filming, roughly disappeared.By the bottom surface sections 56a of filming, compared with the part of the not filming of recess 52a, thickness is thinner, and density is higher, and its surface becomes level and smooth.
As shown in figure 18, in the side of deployed condition leakage barriers, form on sheet material 50, along principal length direction, be provided with the non-embossed area Q in body width direction with Rack.
Particularly, from improving the viewpoint of anti-leakage of the buffering Gan He side leakage barriers 5 of inner side edge portion 51, non-embossed area Q is preferably 1-15mm at the width of body width direction, is particularly preferably 2-10mm.
In addition, in the side of deployed condition leakage barriers, form on sheet material 50, as shown in figure 18, a large amount of recess 52a, 52a ... preferably with respect to imaginary line L, being line symmetry respectively forms.Preferably, according to when side leakage barriers formation sheet material 50 turns back at imaginary line L place, between the bottom surface sections 56a of recess 52a, the mode of at least local contact has formed recess 52a, 52a ...
Therefore, because side leakage barriers 5 forms sheet material 50 by side leakage barriers, according to imaginary line L, turn back and form, so form on relative inner surface 50a, the 50b of sheet material 50 in the side leakage barriers of turning back, as shown in Figure 15 and Figure 16, the bottom surface sections 56a of recess 52a contacts with each other.Figure 16 is the enlarged drawing of the circles mark part in Figure 15.As shown in figure 16, the bottom surface sections 56a of recess 52a is changed into tabular by thin film.
The outer surface of bottom surface sections 56a is plane, between bottom surface sections 56a owing to being that face contacts with face, so there is larger contact area between bottom surface sections 56a.
Between the bottom surface sections 56a of recess 52a, be preferably roughly whole coincidence, now, a pair of inverted cone shape becomes the shape that bottom surface (diameter compare little bottom surface) contacts with each other.Side leakage barriers 5 simple in structure with this structure, bulk and there is resiliency, dress comfort good, there is the stability of good three-dimensional shape simultaneously.
In addition, according to the difference of the machining accuracy of manufacturing process, in side leakage barriers, form that sheet material 50 turns back and while forming side leakage barriers 5, actual folded back position likely departs from imaginary line L, but the side leakage barriers 5 for the present embodiment, actual folded back position departing from respect to imaginary line L as long as below half of the diameter of bottom surface sections 56a, just can access at least local state contacting between bottom surface sections 56a in body width direction.
Although the diameter of preferred bottom surface sections 56a also depends on the machining accuracy of manufacturing process, from obtaining the viewpoint of the state contacting between bottom surface sections 56a, be generally following scope.The diameter of the bottom surface sections 56a of recess 52a is preferably 0.5-4mm, is particularly preferably 1-3mm.
In addition,, from obtaining the viewpoint of stability of the three-dimensional shape of side leakage barriers 5, the area of the ratio of the bottom surface sections 56a overlapping when overlooking bottom surface sections 56a is preferably 10-90%, is particularly preferably 20-80%.
In addition, the reason based on same, the interval of distance between immediate recess 52a (for example, in interval) is in the heart preferably 1-5mm, is particularly preferably 2-3mm, in body width direction, is preferably 1-8mm, is particularly preferably 2-5mm.In addition, according to the difference of the configuration of embossed portion, in interval be not in the heart likely length direction and width, so, sometimes principal length direction and body width direction are hypothetically to set length direction line and the width line connecting between embossed portion, by the interval between this imaginary line and distance immediate embossed portion 52 center, are obtained.
The recess 52a forming in dressing sanitary towel's 1 Shi， side leakage barriers 5 is likely subject to such compression stress of bending by recess 52a.Even if recess 52a is preferably subject to above-mentioned compression stress, be also not easy to bend, and hypothesis recess 52a is bent also and can returns to original shape, this is preferred from obtaining good resiliency of side leakage barriers 5 and the viewpoint of anti-leakage.
As shown in figure 17, in order to realize above-mentioned preferred side leakage barriers 5, the wall portion 57 of the recess 52a of side leakage barriers 5 is by partial thin film.
In addition, be formed with peristome 57b in wall portion 57, the surrounding of this peristome 57b is by filming.By peristome 57b is set in the part 57a of filming, can prevent that part 57a from becoming really up to the mark, so even in the situation that recess 52a is bent, also easily return to the shape of the recess 52a before press-bending.
Below, the wall portion 57 of recess 52a is further illustrated.As shown in figure 17, wall portion 57 is owing to spreading all between the both ends of depth direction of recess 52a width with regulation by filming, so the press-bending property that prevents of recess 52a has obtained further raising.
From preventing the press-bending of recess 52a, obtain the viewpoint of the good wearing comfortableness of side leakage barriers 5 simultaneously, the above-mentioned width of the regulation of the part 57a of filming is preferably 20-90% with respect to the diameter of the bottom surface sections 56a of recess 52a, is particularly preferably 30-80%.In addition, from shape stability, flexibility be not easy the viewpoint of bending, the situation that all forms film like with the part 57a of filming is compared, the part 57a that is more preferably filming has the part of the film like of not forming, and particularly preferably this part that does not form film like is independently scattered in the part 57a of filming.
In addition, as shown in figure 17, wall portion 57 in principal length direction by filming.The part 57a of filming clamps bottom surface sections 56a and along principal length direction, forms on the relative position of wall portion 57.In each recess 52a, by making the direction of part 57a of filming all along principal length direction, can guarantee the flexibility of the body width direction of side leakage barriers 5.
Thereby from improve the three-dimensional viewpoint that improves anti-leakage, obtains the good wearing comfort of side leakage barriers 5 of side leakage barriers 5 simultaneously, the degree of depth T (with reference to Figure 16) of recess 52a in side leakage barriers 5 is preferably 0.2-5mm, is particularly preferably 0.5-2mm.
Here, the degree of depth T of recess 52a for example measures as follows.First, the length cutting out in length and breadth on the sheet material 50 of leakage barriers formation is from the side big or small test film more than 10mm * 10mm.Then, use by the line of embossed portion 52 and non-embossing part and make cutting plane.With microscope, (KEYENCE Co., Ltd. manufactures, and VH-8000) obtains the enlarged photograph of this section.According to the ratio of enlarged photograph, measure the height T (with reference to Figure 16) from the front end 56 of embossed portion 52 to the outer surface of non-embossing part.Height T preferably measures the part (inner surface 50a mono-side of side leakage barriers 5) that the side leakage barriers of stretching out to the inner side of body width direction from the side of absorbent main body 10 forms sheet material 50.The part (another inner surface 50b mono-side of side leakage barriers 5) that the side leakage barriers of turning back forms sheet material 50 also has situation about being bonded together with face sheet 2 etc., is not preferred for highly measurement.In addition, preferably, before measuring section, use the KES-G5HANDY-TYPE COMPRESSION TESTER (KATO TECH Corporation) of KES measuring system, in advance detect thickness T
0(0.5g/cm
2thickness under load), confirm thickness T
z(with reference to Figure 16) is thickness T
090-110%, if lower than 90% or be more than 140%, position is measured in conversion, 110-130% if, by specimen holder in 2 plates to adjust after thickness, by enlarged photograph measuring height T.
Above-mentioned a large amount of recess 52a, 52a in side leakage barriers 5, have been formed ..., recess 52a is out of shape because of compression stress, so side leakage barriers 5 can give the sensation of sanitary towel's wearer softness.In addition, when compression stress disappears, recess 52a returns to again original shape, so can maintain the three-dimensional height of side leakage barriers 5, guarantees good anti-leakage.
In addition, side leakage barriers 5 is owing to having a large amount of recess 52a, 52a ... so when body fluid is attached on the face of skin contact face one side of side leakage barriers 5, body fluid flow in recess 52a, in skin contact face one side of side leakage barriers 5, be not easy to produce body fluid thus residual.
On the other hand, the non-woven fabrics of the non-embossing part of side leakage barriers 5 is not owing to forming embossed portion, without filming, so feel is good yet.The outer surface of the side leakage barriers 5 directly contacting with the skin of sanitary towel wearer is owing to being to be divided and formed by the non-embossed portion of non-woven fabrics, so skin sense of touch is good.
The inner side edge portion 51 of ，Jiu side leakage barriers 5 further illustrates below.
The inner side edge Bu51Shi You side leakage barriers of side leakage barriers 5 forms sheet material 50 and turns back and form at above-mentioned non-embossed area Q.Inner side edge portion 51 has formed the free end of the body width direction inner side of side leakage barriers 5, and extends with linearity along principal length direction.
From forming the viewpoint of three-dimensional barrier, inner side edge portion 51 preferably separates with face sheet 2.In addition, for inner side edge portion 51, owing to by forming groove 7 described later, face sheet 2 being absorbed in around groove 7, so side leakage barriers 5 increases with respect to the three-dimensional degree of face sheet 2, can effectively prevent the body fluid of coming at face sheet 2 upper reaches from body width direction inner side towards side shifting.
In addition, in inner side edge portion 51, do not form embossed portion 52.That is, inner side edge portion 51 is only divided and is formed by non-embossed portion, and the front end of inner side edge portion 51 is round and smooth, has resiliency, and wearing comfort is good.
As shown in figure 14, the row of a large amount of embossed portion 52 and non-embossing part alternative arrangement in above-mentioned side leakage barriers 5, have been formed.Side leakage barriers forms sheet material 50 by a large amount of embossed portion 52,52 is set ... and the easily crooked or bending that becomes.Side leakage barriers forms the above-mentioned row that sheet material 50 is particularly arranged along a plurality of embossed portion 52 partition distance, can be easily crooked.Specifically, embossed portion 52 itself is harder than non-embossing part owing to being compacted, and is therefore the position that is difficult to bending, but is that near the positions embossed portion 52 during non-embossed portion is divided easily bend.Ji， side leakage barriers forms the easy surrounding's bending along embossed portion 52 of sheet material 50.
In addition, while making its skin along wearer crooked in wearing sanitary towel 1, due to same reason, so be not easy to form on sheet material 50 and produce wrinkle in side leakage barriers.Therefore, side leakage barriers 5 is not easy to produce the wrinkle extending along body width direction, prevents that liquid is towards the function admirable of this direction seepage.
From obtaining the viewpoint of good anti-leakage and wearing comfort, a pair of side leakage barriers 5,5 width separately preferably has size as described below.In the part of a pair of alar part 6,6 of being provided with of principal length direction, on the length direction centrage of this alar part 6, in body width direction along the surface measurements of side leakage barriers 5 to the first sealing 8 and the length between the ora terminalis of inner side edge portion 51 1 sides be preferably 10-30mm, be particularly preferably 15-25mm.
In addition, the length that forms sheet material 50 fold back portion along the surface measurements Dao side leakage barriers of side leakage barriers 5 in body width direction is preferably 70-100% with respect to the above-mentioned width of side leakage barriers 5, be particularly preferably 85-95%, reason based on same and from the viewpoint of easy formation the first sealing 8, more than being preferably at least 10mm.
Below the sanitary towel 1 of the present embodiment is further illustrated.As shown in figure 15, sanitary towel 1 has a pair of alar part 6,6 stretching out from the dual-side of the length direction of absorbent main body 10, and this pair of alar part 6,6 forms sheet material 50 by the side leakage barriers of stretching out from absorbent main body 10 respectively and forms.
A pair of alar part 6,6 forms sheet materials 50 with the side leakage barriers 5 You Yizhang side leakage barriers of phase the same side of principal length direction respectively and forms, and the middle section of the side of the length direction of leakage barriers 5 stretches out laterally from the side.
Yi Zhang side leakage barriers forms sheet material 50 and take the first sealing 8 and as border, be divided into side leakage barriers 5 and alar part 6.A pair of alar part 6,6 forms sheet material 50 by side leakage barriers respectively and forms, and easily the edge part along panty crotch bends.
On a face of side leakage barriers formation sheet material 50 that forms respectively a pair of alar part 6,6, be provided with for the alar part 6 of the edge part bending along panty crotch being fixed on to the adhesive layer (not shown) of the outer surface of this underwear.
As shown in figure 15, a pair of side leakage barriers 5,5 engages with back-sheet 3 at the first sealing 8 places of the length direction dual-side portion of absorbent main body 10 respectively.The shape of the first sealing 8 has the shape of tightening up to body width direction inner side at the central part of length direction, make when the alar part 6 arranging is continuously during along the edge part bending of panty crotch, alar part 6 easily and the edge part of this panty crotch identical.
Like this, in sanitary towel's 1 Zhong， side leakage barriers 5 and alar part 6 You Yizhang side leakage barriers formation sheet materials 50 formation of the present embodiment, it is easy that its manufacture becomes.
In addition, in skin contact face one side of the absorbent main body 10 in ， sanitary towel 1, be provided with groove 7 as shown in figure 14.Groove 7 is by principal length side, upwardly extending a pair of embossing groove and the 2 circular-arc laminations flower grooves that extend along body width direction at the both ends of the length direction of this embossing groove form.In addition, in principal length side, upwardly extending a pair of above-mentioned embossing groove has respectively the shape of tightening up to the inside.By groove 7, face sheet 2 and absorber 4 engage.As shown in figure 15, the inner side edge portion 51 of side leakage barriers 5 is located in the outside of groove 7.
Below, the material that just forms the sanitary towel 1 of the present embodiment describes.
Non-woven fabrics as forming side leakage barriers formation sheet material 50, can be used known non-woven fabrics in the past with no particular limitation.Can use the various non-woven fabrics such as hot blast method non-woven fabrics, Nonwovens of spunbond, meltblown non-woven fabrics, jet net-spraying method non-woven fabrics and needle point method non-woven fabrics that obtain such as the heat fusing bonded mat of being manufactured by combing method is carried out to hot blast processing.Associated methods as the fiber in these non-woven fabrics, is not particularly limited, and for example, can use and utilizes the combination of binding agent or pass through the bonding combination of heat fusing.In addition, replace the combination of fiber, also can resemble the mechanical complexation that utilizes fiber jet net-spraying method non-woven fabrics etc.For side leakage barriers 5 being realized significantly to smooth skin sense of touch and flexibility, as non-woven fabrics, most preferably use the heat fusing bonded mat being obtained by combing method carried out to hot blast processing, and under the condition that does not apply strong compression non-woven fabrics and the hot blast method non-woven fabrics that obtains.
Thereby from improve the three-dimensional viewpoint that improves anti-leakage, obtains the good wearing comfort of side leakage barriers 5 of side leakage barriers 5 simultaneously, the mass area ratio that forms the non-woven fabrics of side leakage barriers formation sheet material 50 is preferably 20-100g/m
2, be particularly preferably 25-50g/m
2.
The mensuration of mass area ratio is for example measured as follows.Side leakage barriers is formed to sheet material 50 severings and become size more than 10mm * 10mm, preferably severing becomes that in big or small ，Cong Yige sanitary towel more than 30mm * 30mm, to intercept the gross area be 250mm
2above test piece, measures the weight of this test piece with the minimum electronic balance that is shown as 1mg, convert and obtain mass area ratio.In order to improve the mensuration precision of mass area ratio, preferably from a plurality of sanitary towels intercepting test piece, obtain the meansigma methods of 5 above measured values.
In addition, as the formation material of face sheet 2, back-sheet 3 or absorber 4, can use with no particular limitation the various materials that in the past used in the absorbent commodities such as sanitary napkin.
As shown in Figure 19 (a) and Figure 19 (b), the side leakage barriers of the present embodiment forms sheet material 50 can be by being clipped in the non-woven fabrics as grey cloth 50 ' between the first pressing mold 100 and the second pressing mold 102 and pushing and easily and efficiently manufacture.Figure 19 (b) will want portion at the amplification profile of the vertical enterprising line display of direction of the carriage direction with non-woven fabrics 50 ' in Figure 19 (a).
The first pressing mold 100 consists of metallic roll, and the carriage direction along non-woven fabrics 50 ' in this metallic roll is the protuberance 101 that row shape has a large amount of cone shapes, and above-mentioned row are set up in parallel into multiple row.In each row, be provided with to devices spaced apart protuberance 101, during any one protuberance 101 in being conceived to string, be listed as in the row of adjacent left and right with this, on the position adjacent with this protuberance 101, there is no protuberance.The second pressing mold 102 consists of metallic roll, has the recess 103 of multiple row protuberance 101 embeddings that make in the first pressing mold 100 in this metallic roll.
In addition, the first pressing mold 100 and the second pressing mold 102 are as shown in Figure 19 (b), make in advance front end face and the gap between recess 103 bottom surface of protuberance 101 fully little with respect to the thickness of non-woven fabrics 50 ', and, the front end face of protuberance 101 and/or recess 103 bottom surface are at least set as forming in advance the softening point of the resin that fusing point in the resin of formation fiber of non-woven fabrics 50 ' is minimum or more than fusing point.In addition, in part 104 between the protuberance 101 of multiple row, from the viewpoint of skin sense of touch etc., more than the gap between the first pressing mold 100 and the second pressing mold 102 is preferably redefined for the thickness of non-woven fabrics 50 ', make to be not easy Yin Re and the variation that causes non-woven fabrics.
Preferably on the periphery of the first pressing mold 100, with Rack setting, do not there is multiple row protuberance 101 region Q ' (not shown), and the first pressing mold 100 in the Q ' of Shi Gai region is identical with part 104 with the gap between the second pressing mold 102 in advance.
Between the first pressing mold 100 and the second pressing mold 102, the result of extruding is, non-woven fabrics 50 ' is out of shape and formation recess 52a, the bottom surface sections 56a of this recess 52a is changed into tabular by thin film, and simultaneously, in the wall portion 57 of recess 52a, carriage direction along non-woven fabrics 50 ' has formed by the part 57a of filming, obtains having a large amount of recess 52a, 52a ... the side leakage barriers of the present embodiment form sheet material 50.In addition, preferably the part 104He region Q ' between the protuberance 101 of multiple row locates, and non-woven fabrics 50 ' does not carry out any of filming or compacting.
In the wall portion 57 of recess 52a, along the carriage direction of non-woven fabrics 50 ', form described in the reasons are as follows of part 57a of filming.The first, on carriage direction, the multiple row protuberance 101 of pressing mold 100 contacts at first with the non-woven fabrics without concaveconvex structure.Therefore, compare with other position, easily apply hot total amount and pressure.The second, the protuberance 101 of extracting after chimeric is easily exerted pressure to the rear portion of carriage direction.The 3rd, device is not easy to produce deviation on width, generation time deviation sometimes on carriage direction.Because above will thereby easily apply heat and pressure on carriage direction, so infer easy filming.
In addition, in each recess 52a, in the part 57a of the filming of wall portion 57 due to following former thereby form peristome 57b.As mentioned above, owing to easily exerting pressure, thus in the part of filming, the easy attenuation of resin thickness, resin is easily assembled with molten condition or the state approaching with it, and non-woven fabrics 50 ' is own inhomogeneous etc., because these want thereby form peristome 57b.
The present invention (the 3rd invention) is not limited to above-mentioned embodiment or example, only otherwise departing from aim of the present invention just can carry out suitable change.
For example, in the sanitary napkin 1 of the present embodiment, the plan view shape of embossed portion 52 is circular, except circle, can be also ellipse, triangle, rectangle or their combination etc.In addition, the total length that a pair of side leakage barriers 5,5 preferably spreads all over absorbent main body 10 forms, but also can at least be formed in the part relative with the excretory portion of wearer.
In addition, the deployed condition of the side leakage barriers 10 of the present embodiment as shown in figure 18, is overlooked circular recess 52a and is configured to zigzag, but can be also that the recess 52a of lengthwise configures as shown in Figure 20.Recess 52a forms row T1, T2, T3, T4 in principal length direction.In each row, between recess 52a, be spaced apart length P1, this P1 is shorter than the length P2 of the principal length direction of recess 52a.Row T1 and row T3 and row T2 and row T4 are respectively with respect to imaginary line L configuration equidistantly in body width direction.In addition, the recess 52a in row T1 and row T2 is with respect to the staggered positions configuration in principal length direction of the recess 52a in row T3 and row T4.In addition, from improving the three-dimensional height of side leakage barriers 5, thereby the viewpoint that improves its anti-leakage set out, preferably the elastomeric element of wire is engaged with the side leakage barriers formation sheet material 50 shown in Figure 20 along imaginary line L with elongation state, then form side leakage barriers 5.
Moreover the preferable production process that the side leakage barriers of above-mentioned the present embodiment forms sheet material 50 is only an example, also can be used in this method listing method in addition and manufactures.In addition, sanitary napkin 1 also can not have a pair of alar part.
The present invention's's (the 3rd invention) absorbent commodity can be sanitary napkin, can be also underwear back boxing, incontinence pad etc.
The part that in an above-mentioned embodiment, description thereof is omitted and only have the part that an embodiment has can suitable mutual utilization.
Claims (6)
1. absorbent commodity, it possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and is in fact elongate shape, wherein, in the length direction both sides of skin contact face one side of described absorbent main body, is provided with a pair of side leakage barriers; Described a pair of side leakage barriers is formed by the irregular bulk non-woven fabrics of tool respectively; Described non-woven fabrics is overlapped into 2 layers according to having described concavo-convex face mode respect to one another, and the protuberance among relative described two sides on a face contacts with the protuberance on another face,
In described non-woven fabrics, recess is the embossed portion being processed to form by embossing, is configured to jagged pattern, and each embossed portion forms respectively discontinuously,
A pair of side leakage barriers covers respectively the length direction both sides of skin contact face one side of absorbent main body,
In skin contact face one side of absorbent main body, be provided with a pair of groove, the inner side edge portion of side leakage barriers is located in the outside of this groove,
Described protuberance is the state of having filled fibrous material,
The height of the described protuberance of inner surface one side that the embossed portion of take is border as the height of the described protuberance of T, outer surface one side be T
1time, T compares T
1high or equal.
2. absorbent commodity as claimed in claim 1, wherein, the described non-woven fabrics that forms described side leakage barriers in the width of described absorbent commodity described in side direction absorbed layer one side turn back, its end of turning back has formed the inner side edge portion of described side leakage barriers.
3. absorbent commodity as claimed in claim 1, wherein, described absorbent commodity has a pair of alar part stretching out from the dual-side of the length direction of described absorbent main body, and described a pair of alar part is formed by the described non-woven fabrics stretching out from described side leakage barriers respectively.
4. absorbent commodity, it possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and is in fact elongate shape, wherein, in the length direction both sides of skin contact face one side of described absorbent main body, is provided with a pair of side leakage barriers; Described a pair of side leakage barriers is following formation respectively: by the side leakage barriers with a large amount of embossed portion, form sheet material has the end of turning back mode according to the inner side of the width in described absorbent main body described side leakage barriers is formed to the outside that sheet material is gone back to the described width of described absorbent main body; Described embossed portion is configured to jagged pattern, and each embossed portion forms respectively discontinuously; Front end in the described end of turning back does not form described embossed portion; It is stacked and engage integrated formation by a large amount of embossed portion by 2 above non-woven fabrics that described side leakage barriers forms sheet material; Non-embossed portion is swelled laterally by forming described embossed portion,
A pair of side leakage barriers covers respectively the length direction both sides of skin contact face one side of absorbent main body,
In skin contact face one side of absorbent main body, be provided with a pair of groove, the inner side edge portion of side leakage barriers is located in the outside of this groove,
Protuberance is the state of having filled fibrous material,
The height of the protuberance of inner surface one side that the embossed portion of take is border as the height of the protuberance of T, outer surface one side be T
1time, T compares T
1high or equal.
5. absorbent commodity, it possesses the absorbent main body with absorbed layer and application of anti-leakage layers, and be in fact elongate shape, wherein, length direction both sides in skin contact face one side of described absorbent main body are provided with a pair of side leakage barriers, and described a pair of side leakage barriers is following formation respectively: by the side leakage barriers with a large amount of embossed portion, form sheet material has the end of turning back mode according to the inner side of the width in described absorbent main body described side leakage barriers is formed to the outside that sheet material is gone back to the described width of described absorbent main body; Described embossed portion is configured to jagged pattern, and each embossed portion forms respectively discontinuously; Described embossed portion is side-prominent at the relative inner surface one of the described side leakage barriers formation sheet material turning back respectively; Described embossed portion front end separately forms plane, and this plane part is by filming,
A pair of side leakage barriers covers respectively the length direction both sides of skin contact face one side of absorbent main body,
In skin contact face one side of absorbent main body, be provided with a pair of groove, the inner side edge portion of side leakage barriers is located in the outside of this groove,
Protuberance is the state of having filled fibrous material,
The height of the protuberance of inner surface one side that the embossed portion of take is border as the height of the protuberance of T, outer surface one side be T
1time, T compares T
1high or equal.
6. the absorbent commodity as described in claim 4 or 5, wherein, described absorbent commodity has a pair of alar part stretching out from the dual-side of the length direction of described absorbent main body, and described a pair of alar part forms sheet material by the described side leakage barriers of stretching out from described absorbent main body respectively and forms.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP124611/2006 | 2006-04-28 | ||
| JP2006124611A JP4822923B2 (en) | 2006-04-28 | 2006-04-28 | Absorbent articles |
| JP239024/2006 | 2006-09-04 | ||
| JP2006239023A JP4749283B2 (en) | 2006-09-04 | 2006-09-04 | Absorbent article and manufacturing method thereof |
| JP2006239024A JP4749284B2 (en) | 2006-09-04 | 2006-09-04 | Absorbent articles |
| JP239023/2006 | 2006-09-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101061978A CN101061978A (en) | 2007-10-31 |
| CN101061978B true CN101061978B (en) | 2014-01-15 |
Family
ID=38766036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710091758.0A Expired - Fee Related CN101061978B (en) | 2006-04-28 | 2007-04-09 | Absorbent article |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4822923B2 (en) |
| CN (1) | CN101061978B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4969437B2 (en) * | 2007-12-28 | 2012-07-04 | 花王株式会社 | Absorbent articles |
| JP2009291475A (en) * | 2008-06-06 | 2009-12-17 | Zuiko Corp | Absorbent core for sanitary article, and method of manufacturing the same |
| CN103550033B (en) * | 2013-10-22 | 2015-04-22 | 贵州汇景纸业有限公司 | Novel strong-absorption paper diaper |
| CN103767830B (en) | 2014-01-24 | 2015-12-09 | 北京倍舒特妇幼用品有限公司 | A kind of multiple structure absorbent cores for nursing pad and preparation method thereof |
| CN104523371B (en) * | 2015-01-22 | 2018-11-06 | 黄文鹏 | Sanitary napkin |
| JP6704236B2 (en) * | 2015-10-16 | 2020-06-03 | 花王株式会社 | Absorbent article |
| CN108524103A (en) * | 2018-05-08 | 2018-09-14 | 湖北丝宝股份有限公司 | A kind of sanitary napkin and manufacture craft with novel flap |
| CN108578071A (en) * | 2018-05-23 | 2018-09-28 | 广东川田卫生用品有限公司 | A kind of novel encirclement structure and the sanitary napkin using the novel encirclement structure |
| JP6692954B2 (en) * | 2018-06-01 | 2020-05-13 | 花王株式会社 | Absorbent article |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995007063A1 (en) * | 1993-09-09 | 1995-03-16 | The Procter & Gamble Company | Absorptive article |
| WO1997020533A1 (en) * | 1995-12-04 | 1997-06-12 | The Procter & Gamble Company | Absorbent article with angled band structural elastic-like film cuffs |
| JP2001252306A (en) * | 2000-03-13 | 2001-09-18 | Uni Charm Corp | Absorptive article |
| CN1095648C (en) * | 1994-01-13 | 2002-12-11 | 花王株式会社 | Hygienic cotton wool for physiological use |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05220191A (en) * | 1992-02-12 | 1993-08-31 | Shiseido Co Ltd | Physilogical napkin and production thereof |
| JP2002000653A (en) * | 2000-06-19 | 2002-01-08 | Uni Charm Corp | Absorptive goods |
| JP3609361B2 (en) * | 2000-10-12 | 2005-01-12 | 花王株式会社 | Three-dimensional sheet material |
| JP3818955B2 (en) * | 2002-11-06 | 2006-09-06 | 花王株式会社 | Absorbent articles |
| JP4322140B2 (en) * | 2004-01-30 | 2009-08-26 | 花王株式会社 | Composite elastic member and manufacturing method thereof |
| US7252656B2 (en) * | 2004-02-18 | 2007-08-07 | The Procter & Gamble Company | Disposable absorbent articles with wings having corrugated regions and methods of manufacturing thereof |
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2006
- 2006-04-28 JP JP2006124611A patent/JP4822923B2/en active Active
-
2007
- 2007-04-09 CN CN200710091758.0A patent/CN101061978B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995007063A1 (en) * | 1993-09-09 | 1995-03-16 | The Procter & Gamble Company | Absorptive article |
| CN1095648C (en) * | 1994-01-13 | 2002-12-11 | 花王株式会社 | Hygienic cotton wool for physiological use |
| WO1997020533A1 (en) * | 1995-12-04 | 1997-06-12 | The Procter & Gamble Company | Absorbent article with angled band structural elastic-like film cuffs |
| JP2001252306A (en) * | 2000-03-13 | 2001-09-18 | Uni Charm Corp | Absorptive article |
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| Title |
|---|
| JP平3-268753A 1991.11.29 |
| JP特平表11-500653A 1999.01.19 |
| JP特开2001252306A 2001.09.18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007296001A (en) | 2007-11-15 |
| CN101061978A (en) | 2007-10-31 |
| JP4822923B2 (en) | 2011-11-24 |
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