CN101543443A - Disposable absorbent article - Google Patents
Disposable absorbent article Download PDFInfo
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- CN101543443A CN101543443A CNA2009101347668A CN200910134766A CN101543443A CN 101543443 A CN101543443 A CN 101543443A CN A2009101347668 A CNA2009101347668 A CN A2009101347668A CN 200910134766 A CN200910134766 A CN 200910134766A CN 101543443 A CN101543443 A CN 101543443A
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- resin powder
- absorbent resin
- water accepting
- accepting layer
- layer
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- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
The invention provides a disposable absorbent article includes an absorbent mat between a liquid-permeable top sheet and a liquid-impermeable back sheet. The absorbent mat includes a sheet-shaped water-absorbent layer that contains a water-absorbent resin powder but that does not contain pulp fibers; and a fiber assembly layer that contains a water-absorbent resin powder and pulp fibers in this order from a top sheet side. The sheet-shaped water-absorbent layer includes a plurality of water-absorbent resin presence regions in each of which the water-absorbent resin powder is wrapped; and a plurality of water-absorbent resin powder absence regions each being formed between the two adjacent water-absorbent resin powder presence regions.
Description
The application is that application number is 200480006367.9, the applying date is that March 12, denomination of invention in 2004 are: the dividing an application of disposable absorbent article.
Technical field
The present invention relates to disposable absorbent articles such as a kind of disposable diaper or disposable pants.
Background technology
In recent years, use in the field of hygienic material of disposable absorbent article at disposable diaper, disposable pants, sanitary napkin etc., particularly needed adult uses in the field of disposable diaper in personage's at advanced age drainage nursing, do not need repeatedly to be done in order to make wearing because of changing babies' napkin more, in addition, in order to alleviate care-giver's physical load, wish to have the absorbent commodity that possesses the high absorbing power that can stand to use for a long time, is difficult to the morphological stability of losing shape in use.
Employed in the past absorbent commodity is to possess the article that absorber forms between the back foil of the surface sheets of liquid permeability and liquid impermeability, as this absorber, use will divide a pulp fiber, absorbent resin powder, thermoplastic fibre etc. to make matt-like, by wrap into the absorption pad of having fixed with tissue paper etc.
In order to improve the absorbent properties of this kind absorbent commodity,,, can cause easily that absorption pad loses shape owing to dilated absorbent resin powder though the method for the absorbent resin powder amount that increases in the absorption pad is arranged.
In addition, by increasing the branch silk pulp fiber amount that constitutes absorption pad, also can increase absorbent properties.But, during branch silk pulp fiber amount in increasing described absorption pad,, therefore between wearer's thigh, can increase very hard sensation, discomfort that will be very under long-time situation about using because the thickness of absorption pad increases.In addition, when increasing the pulp fiber amount, with the phenomenon that is easy to cause that the body fluid such as urine that temporarily absorbed flow backwards to the top flat side in the mat, and because the body fluid that flows backwards can cause harmful effect to wearer's skin, therefore using under the situation of absorbent commodity for a long time especially, it is very serious that its influence will become.
Up to now, absorbent commodity as the refluence that has improved body fluid, announcement has between the leakproof thin slice of liquid permeability thin slice and liquid impermeability, has possessed the article (spy opens communique 2002-No. 224161) of the absorbing material with the water accepting layer that comprises water-absorbing resins.In this kind technology, adopted following formation, that is,, used the material that constitutes by water-absorbing resins and fibrous substrate, between the surface of the surface sheets of liquid permeability and absorbing material, also be provided with the water-absorbing resins layer as described absorbing material.
But, water-absorbing resins layer in the described technology is disperseed separately owing to water-absorbing resins, perhaps by the absorbent paper clamping of having used cellulose fibre etc., even therefore this layer helps to improve refluence, but the stability for form is not but considered fully, when expanding, just might produce the problem that the super absorbent resin layer loses shape when the absorbent resin powder absorb body fluids.
On the other hand, as ultra-thin, be difficult to after suction, cause the absorbent commodity that loses shape, propose not contain non-woven fabrics pulp fiber in addition by the applicant, utilized netted hot melt binding agent absorbent resin powder to be clamped in the ultra-thin absorbing sheet body (the international pamphlet that discloses No. 01/89439) of 2 formations between the non-woven fabrics.
In this kind technology,, therefore do not worry causing the situation of losing shape, and become ultra-thin and comfortable absorbing sheet body for the wearer because absorbent resin powder kept securely by netted hot melt binding agent.But, when considering the absorbent commodity that long-time use is used this absorption pad as absorber, must guarantee more absorbtivity.In order to ensure more absorbtivity, for example can consider stacked multi-disc absorbing sheet body and use as absorption pad, perhaps increase the area of per 1 absorbing sheet body or the method for absorbent resin powder amount.But when using a lot of absorbing sheet bodies, or when increasing the absorbent resin powder amount of per 1 absorbing sheet body,, therefore just become hard absorption pad, cause very hard adherent feeling because the ratio of the whole contained absorbent resin powder of absorption pad improves.In addition, increase the area of per 1 absorbing sheet body, must thereupon increase the area of disposable absorbent article self, this situation is not only for manufacturing, and all can bring inconvenience for using.
In addition, in the described absorbing sheet body,, therefore when comparing, relatively poor aspect absorption speed with the absorption pad in the past that with the pulp fiber is main constituent because the main constituent of performance absorbent properties is an absorbent resin powder.
Summary of the invention
The present invention is conceived to aforesaid situation and finishes, its purpose is, the disposable absorbent article that has possessed following absorption pad is provided, promptly, can absorb body fluid such as urine apace, have the high absorbent capacity that can use for a long time, lose shape, and have the comfortable adherent feeling that is difficult to cause refluence even absorb body fluids also is difficult to cause.
Disposable absorbent article of the present invention is between the back foil of the surface sheets of liquid permeability and liquid impermeability, the disposable absorbent article that possesses absorption pad, it is characterized in that, described absorption pad begins to have successively the laminar water accepting layer that contains absorbent resin powder and do not contain pulp fiber from the surface sheets side, the fiber collection layer that contains absorbent resin powder and pulp fiber, and there is the zone in a plurality of absorbent resin powders that described laminar water accepting layer has wrapped absorbent resin powder in having, being formed at adjacent absorbent resin powder exists the non-existence of absorbent resin powder between the zone regional.
Owing to, just can improve absorbent properties,, also can bring into play absorbability fully, the refluence of inhibition body fluid even when therefore using for a long time by adopting this kind formation.
Description of drawings
Fig. 1 is a partial cut axonometric chart of having represented laminar water accepting layer of the present invention.
Fig. 2 is the generalized section of described laminar water accepting layer.
Fig. 3 is the generalized section that has possessed the absorption pad of dilated laminar water accepting layer.
Fig. 4 is the generalized section that has possessed the absorption pad of the laminar water accepting layer with stromatolithic structure.
Fig. 5 is possessing of other has the generalized section of absorption pad of the laminar water accepting layer of stromatolithic structure.
Fig. 6 is possessing of other has the generalized section of absorption pad of the laminar water accepting layer of stromatolithic structure.
Fig. 7 is other the generalized section of structure of laminar water accepting layer of expression.
Fig. 8 is the generalized section that has possessed the absorption pad of the fiber assembly with opening.
Fig. 9 (a)～(c) is the vertical view with fiber collection layer of opening.
Figure 10 is the generalized section on the Y-Y line of the fiber collection layer shown in Fig. 9 (a).
Figure 11 is the figure of the concrete example of expression preferred absorbent commodity of the present invention.
Figure 12 is the generalized section on the X-X line of described absorbent commodity.
Figure 13 is result's the chart of the refluence of expression embodiment and comparative example.
The specific embodiment
Disposable absorbent article of the present invention is between the back foil of the surface sheets of liquid permeability and liquid impermeability, the disposable absorbent article that possesses absorption pad, the feature of maximum of the present invention is, described absorption pad begins to have successively the laminar water accepting layer that contains absorbent resin powder and do not contain pulp fiber from the surface sheets side, the fiber collection layer that contains absorbent resin powder and pulp fiber, and there is the zone in a plurality of absorbent resin powders that described laminar water accepting layer has wrapped absorbent resin powder in having, being formed at adjacent absorbent resin powder exists the non-existence of absorbent resin powder between the zone regional.
By the absorption pad that employing has aforesaid formation, just can guarantee to stand the water absorption of use for a long time, and can prevent the deterioration of usabilities such as refluence property.
At first, the fiber collection layer as an element of described absorption pad is described.This fiber collection layer is a layer of being located at the bottom of laminar water accepting layer in absorption pad of the present invention, is indispensable layer in order to ensure the water absorption that can stand to use for a long time.
Described fiber collection layer applies the property fiber by a minute silk pulp fiber, hot melt and the absorbent resin powder that is scattered in these fibers constitutes, and forms by wrapping into the material that they make unitary mould with tissue paper (for example cotton paper etc.).
As the absorbent resin powder that is scattered in the described fiber collection layer, can use and the identical powder of laminar water accepting layer described later.The amount of water-absorbing resins of this moment best with respect to the pulp fiber amount of employed branchs in the fiber collection layer more than the 15 quality %, below the 90 quality %.When the water-absorbing resins amount surpasses 90 quality %, because resin is too much, produce harder sensation as a whole, also become the reason that dilated water-absorbing resins is lost shape in addition, therefore not ideal enough.On the other hand, when water-absorbing resins during less than 15 quality %, content is very few, can't participate in the raising of absorbtivity effectively.
Branch silk pulp fiber as the fiber that forms the fiber collection layer, can use the pulp fiber of paper supply, apply the property fiber as the hot melt that uses in order to improve conformality, can enumerate TPO fiber or polyester fiber or composite fibres etc. such as polyethylene, polypropylene.
In that described fiber and absorbent resin powder are mixed, make unitary mould, or after making fiber, scatter absorbent resin powder and form the fiber collection layer.The fiber collection layer that has formed unitary mould applies the pushing of machinery when being preferably in heating, make its dimensionally stableization.After this, wrapped in the tissue paper.Though tissue paper use cotton paper etc. gets final product, so long as can see through the paper of body fluid, just is not particularly limited.And the flat shape of the integral body of fiber collection layer for example can be enumerated Pear-Shaped or shapes such as rectangle, hourglass shape as long as suitably determine according to purposes.
Below, laminar water accepting layer is described.Among Fig. 1 and Fig. 2, expression has shown the partial cut axonometric chart and the generalized section of the representational embodiment of laminar water accepting layer of the present invention.And, above meaning, the arrow on the right side among following Fig. 2～Fig. 7 and 12 is wearer's skin face side.
Laminar water accepting layer 1A has at the 1st non-woven fabrics 2, with it between roughly the same the 2nd non-woven fabrics 4 of area, shape, clamping the formation of absorbent resin powder 3.This absorbent resin powder 3 applied the 1st adhesive layer S1, the 2nd adhesive layer S2 that coat on the 2nd non-woven fabrics 4 on the 1st non-woven fabrics 2 are fixed on each non-woven fabrics.
Here, 2a is the non-existence of the absorbent resin powder at laminar water accepting layer width both ends zone (being made as zone, both ends 2a), 2b is the non-existence zone of absorbent resin powder (being made as zone line 2b) of being located at laminar water accepting layer pars intermedia, and 2c is that absorbent resin powder exists the zone.Among Fig. 1,4 absorbent resin powders exist regional 2c (among figure, the blank direction of arrow) on the long side direction of the 1st and the 2nd non-woven fabrics 2,4 to exist continuously, are existed separatedly by the regional 2b of the non-existence of absorbent resin powder on width.
In addition, the 1st and the 2nd non-woven fabrics 2,4 is engaged (Fig. 2) at the both ends zone 2a and the zone line 2b place that do not have absorbent resin powder 3.That is, described absorbent resin powder exists sealed 5 of regional 2c and the absorbent resin powder that is positioned at the adjacent position to exist the zone to demarcate.And, among Fig. 1,2,, also can be provided on the regional 2b of the non-existence of absorbent resin powder though represented that adhesive layer S1, S2 only are equipped on absorbent resin powder and have example on the regional 2c.In addition, sealing 5 also can form by sealing with heat seal etc.
Described sealing 5 must be according to making each adjacent absorbent resin powder exist the self-existent separately mode of regional 2c, 2c to be provided with at least.After the suction, absorbent resin powder 3 expands and exists the inside of regional 2c to launch at absorbent resin powder.So, even in laminar water accepting layer 1A, be formed with the non-existence of absorbent resin powder zone, when not having sealing, will on constituting between the non-woven fabrics of laminar water accepting layer comprehensively after the suction, form the layer of dilated water-absorbing resins, thereby certainly can't and the fiber collection layer between guarantee the space, dilated water-absorbing resins can hinder seeing through of the body fluid that is discharged from later on for the 2nd time.Thus, just exist among regional 2c, the 2c and need form sealing 5 at each absorbent resin powder according to the mode of bag in absorbent resin powder 3.And, in the regional 2a of the non-existence of absorbent resin powder, the 2b that form sealing 5,, also can have absorbent resin powder so long as do not influence the degree of sealing.
Among Fig. 3 in the expression absorbent article of the present invention employed absorption pad absorbed the state of body fluid.The absorption pad of this legend possesses laminar water accepting layer 1A, at the downside of this laminar water accepting layer 1A, possesses fiber collection layer 6A.This fiber collection layer 6 form with 2 layers the fiber assembly up and down of roughly the same shape stacked structure.
Among Fig. 3, absorbent resin powder 3 absorbs and is expanded by the excretory body fluid of wearer.Absorbent resin powder 3 exists 2,4 of the non-woven fabrics of regional 2c to allow in the scope of stretching, extension at sealed 5,5 absorbent resin powder of having divided, and increases its volume, and the thickness of laminar water accepting layer 1A is increased.Consequently, the distance of being located at the fiber collection layer 6A of bottom of laminar water accepting layer 1A and wearer's skin will be separated greatlyyer.
And, among the fiber collection layer 6A, between its fiber, have a plurality of spaces, in addition, contained absorbent resin powder 7 does not concentrate on a position among the fiber collection layer 6A, but exists dispersedly.So when suction, described space is owing to can become the expansion space of fiber or absorbent resin powder 7, therefore before and after body fluid absorption, fiber collection layer 6A just can not make its thickness change terrifically.
The reason of the phenomenon of in general, the refluence of absorbent commodity (wet back) is the existence of the fiber collection layer that possessed in these article.The fiber collection layer mainly remains on the body fluid of being discharged in its interfibrous space.So, remain on interfibrous body fluid and can be subjected to certain extruding, and be easy to ooze out to the fiber collection laminar surface because of the fiber collection layer.In contrast, absorbent resin powder is owing to be firmly held in absorbent resin powder (expansion particle) inside with the body fluid that is absorbed, even therefore when resin is extruded, the body fluid that has absorbed is also considerably less to the situation that resin surface oozes out once more.
In addition, the absorption pad of absorbent commodity of the present invention is because when laminar water accepting layer 1A is disposable when body fluid is absorbed, its thickness promptly can increase because of the expansion of absorbent resin powder 3, and therefore the interval of the fiber collection layer 6A of the final water conservation layer of conduct and wearer's skin will be drawn back.Thus, even fiber collection layer 6A is extruded, when body fluid oozed out from fiber collection layer 6A, this body fluid also was difficult to cross the laminar water accepting layer 1A that has increased thickness and arrives surface sheets 11 (with reference to Fig. 9), thereby suppresses the refluence of body fluid effectively.
In addition, at this moment, being located at the expansion that sealing 5 among the regional 2a of the non-existence of absorbent resin powder, the 2b is accompanied by absorbent resin powder 3, rises to upside on thickness direction at leisure in the position before absorb water.Consequently, between fiber collection layer 6A and sealing portion 5, produce space 8.Long side direction to absorbent commodity spreads owing to make the body fluid that oozes out from the fiber collection layer 6A that has been subjected to extruding pass this space segment in the space 8 that so produces, so the existence in this space 8 also can help to prevent to flow backwards.
, when long-time the use, particularly when the body fluid that absorption is discharged from later on for the 2nd time, can play a role effectively in the space 8 that produces between fiber collection layer 6A and the laminar water accepting layer 1A.That is because the water quantities that can absorb of laminar water accepting layer 1A is restricted, absorb to its to greatest extent under the situation, even discharge new body fluid, also can't absorb.But if having space 8 at the downside of laminar water accepting layer 1A, then unabsorbed body fluid will pass space 8, the part diffusion in the leeway that also has suction in fiber collection layer 6A, thus it can be absorbed.
In addition, therefore laminar water accepting layer 1A can help to prevent to flow backwards owing to prevent body fluid from the passing through of the laminar water accepting layer 1A of fiber collection layer 6A side direction upside.That is, when absorb body fluids, among the 2c of the absorbent resin powder of laminar water accepting layer 1A zone because dilated absorbent resin powder 3 becomes the state of tight obstruction, so liquid just be very difficult to by.Like this, the liquid that oozes out to the surface of fiber collection layer 6A just can't pass through to laminar water accepting layer 1A upside, can not flow backwards.
But this dilated absorbent resin powder exists regional 2c preventing body fluid when the fiber collection layer flows backwards, and the body fluid that also can hinder new discharge passes through to the downside of laminar water accepting layer 1A.But, because in laminar water accepting layer 1A of the present invention, be provided with sealing 5 (zone line 2b), there is not absorbent resin powder 3 in sealing portion 5, even perhaps existing also is minute quantity, therefore since new body fluid of discharging can pass sealing 5 and shift to the fiber collection layer 6A of downside apace, so just can absorb later body fluid reliably the 2nd time.
As mentioned above, among the present invention,, just can guarantee absorbtivity that the 2nd later discharge liquor also absorbed apace by laminar water accepting layer 1A and fiber collection layer 6A are made as described structure.In addition, be suppressed at more low-levelly by refluence, prevent that wearer's skin is contaminated, just can keep clean body fluid.
Among the present invention,, also laminar water accepting layer 1A can be made as the stromatolithic structure more than 2 layers in order to ensure sufficient absorbtivity.When the stromatolithic structure that laminar water accepting layer 1A is made as more than 2 layers, both can be with a plurality of laminar water accepting layer 1A stacked simply (Fig. 4), in addition also can the laminar water accepting layer 1A of wide cut is folding, form stromatolithic structure (Fig. 5,6).Adopting under the situation of folded structure, so long as in the folding mode (Fig. 5) of the width centre of 1 plate sheet shape water accepting layer 1A, with the width ora terminalis downwards or the mode that folds over (Fig. 6), just can guarantee essential absorbtivity.
Under the situation for the laminar water accepting layer 1A that has these stromatolithic structures in employing, reduce the refluence amount of the absorbent commodity that uses it, guarantee infiltration rate, diffusibility fast, preferably make the absorbent resin powder of laminar water accepting layer 1A exist regional 2c to overlap separately.Because in laminar water accepting layer 1A up and down, by being existed between the regional 2c, absorbent resin powder overlaps, the thickness of laminar water accepting layer 1A after the expansion will become big, it is big that the interval of wearer's skin and fiber collection layer further becomes, and the effect that therefore suppresses the refluence phenomenon of liquid will increase.When absorbent resin powder exists regional 2c to overlap with sealing 5, just can't form space 8 effectively, the body fluid that is discharged from later on for the 2nd time successfully can't be absorbed.And in order stably to keep aforesaid stromatolithic structure, each laminar water accepting layer 1A preferably engages fixing in advance.
In addition, as shown in Figure 7, also can use between the 1st non-woven fabrics 2, middle non-woven fabrics the 9, the 2nd non-woven fabrics 4 these 3 non-woven fabrics, adhesive layer S1, S2, S3 are set, the laminar water accepting layer 1B that absorbent resin powder 3 has been enclosed.In this laminar water accepting layer 1B, the interlayer of the absorbent resin powder 3 about thickness direction is because therefore non-woven fabrics 9 in the middle of only having 1 is compared with the laminar water accepting layer 1A shown in Fig. 4～6, manufacturing process is oversimplified, and can reduce the cost of absorbent commodity self.In addition, owing to compare,, therefore can also omit making space as long as manufacturing thin slice does not in a narrow margin need folding process yet with the situation that laminar water accepting layer 1A is folding.
Though the fiber collection layer 6A of illustrated up to now absorption pad is with the fiber assembly of the roughly the same shape structure along 2 layers of stacked on top of one another, but also can be the structure that only constitutes by 1 layer fiber assembly, can also be with the overlapping structure more than 3 layers of fiber assembly.But, because when the fiber collection layer became blocked up, the thickness of the absorption pad of gained just increased very greatly, thereby the very hard sensation of increase between wearer's thigh is arranged, the situation that usability is worsened, so the lamination sheets number suitably determines to get final product.
In addition, as the fiber collection layer, the set layer that also can use the fiber assembly of upside to have the formation of opening.This is because can be difficult to cause when wearing loses shape, and also accelerates body fluid absorption speed.Represented among Fig. 8 in the bottom of laminar water accepting layer 1A, set the profile that constitutes the absorption pad of different fiber collection layer 6B with described fiber collection layer 6A.This fiber collection layer 6B is that upside fiber assembly 61, or downside fiber assembly that width narrower identical with upside fiber assembly 61 width 62 is stacked and constitute.
Set peristome 63 on the upside fiber assembly 61 of this legend is owing to be neither to exist pulp fiber also not have the zone of absorbent resin powder, so rigidity is lower.Like this, utilize the existence of peristome 63, upside fiber assembly 61 is with regard to easy deformation.Because laminar water accepting layer 1A was extremely thin thin slice originally, though therefore the absorption pad of this formation can or not cause and lose shape along with wearer's the bodily form or mobile and be out of shape.In addition, consequently, between wearer's skin and absorption pad, be difficult to produce the gap, can obtain to prevent the effect of the transverse leakage of body fluid.In addition,,, therefore just can realize absorbing fast, utilize this formation also can prevent transverse leakage owing to necessarily have downside fiber assembly 62 at the downside of peristome 63.
The shape of peristome 63 is not particularly limited.Among Fig. 9 (a), represented that 2 rectangular peristomes 63 are continuous at the long side direction of fiber collection layer 6B, and by with respect to the long side direction centrage standoff distance W of fiber collection layer 6B and the example that near symmetrical ground in the left and right sides forms, among Fig. 9 (b), represented on the position identical, to form intermittently the example of 6 peristomes 63 with Fig. 9 (a), among Fig. 9 (c), represented to be formed with the example of the cyclic peristome 63 that the central part with upside fiber assembly 61 surrounds.In addition, Figure 10 is Y-Y line profile of Fig. 9 (a).
Shown in the middle example of Fig. 9 (a)～(c), peristome 63 preferably is located at the central part zone in addition of upside fiber assembly 61 as described.Here, the central part of described so-called fiber assembly 61 is meant the zone that contacts with wearer's excretory portion (be equivalent to urinate mouthful and its periphery) when wearing absorbent commodity, for example be meant the zone of the width that has the length represented with arrow M and represent with arrow N in Fig. 9.If be equivalent to urinate mouthful and the part of periphery is not provided with peristome 63 like this, and configuration fibers etc. absorb composition, then owing to greatly improved the connecting airtight property of wearer and absorbent commodity, therefore just can guarantee the excretory urine of institute is absorbed apace.
In addition, to the integral body diffusion of the fiber assembly 63 of downside, be preferred because described peristome 63 so long as along the long side direction of fiber collection layer 6B continuously or the mode of extending intermittently, just can make body fluid pass this peristome 63 therefore.In addition, under roughly symmetric locational situation about the long side direction centrage that is formed at described peristome 63 with respect to upside fiber assembly 61, just easier distortion of absorption pad, therefore preferred.
And, existing more than the position 2 of the width of upside fiber assembly 61 under the situation of peristome 63, the interval W between the peristome 63 preferably is made as more than the 10mm.This be because, when interval W is narrow, though upside fiber assembly 61 at peristome 63 place's warpages, absorbent commodity also can't be fit to wearer's the bodily form fully, prevents from the effect of the leakage of the width of absorbent commodity very low.More preferably be made as more than the 20mm, further preferably be made as more than the 30mm.
When adopting described formation, about the preferred 2～10mm of thickness of fiber collection layer 6B, the ratio of the thickness of the downside fiber assembly 62 among the fiber collection layer 6B is preferred about 50%, and more preferably about 40%.This is because when the thickness of downside fiber assembly 62 surpassed 50%, even peristome 63 then is set on upside fiber assembly 61, absorption pad also was difficult to distortion.
Below, describe for the formation raw material of laminar water accepting layer 1A, 1B (following when being called laminar water accepting layer 1 simply, as to be to represent both), fiber collection layer 6A, 6B (following when being called fiber collection layer 6 simply, as to be to represent both).
The 1st non-woven fabrics the 2, the 2nd non-woven fabrics 4, middle non-woven fabrics 9 as described laminar water accepting layer 1, though can use the non-woven fabrics of liquid permeability, but as the fiber that constitutes this kind non-woven fabrics, except hydrophilic fibres such as cellulose, artificial silk, Cotton Gossypii, can also use the material that the surface of hydrophobic fibres such as polypropylene, polyethylene, polyester, polyamide has been carried out hydrophilic treated with surfactant.In addition, when utilizing heat seal to form sealing 5, use can be carried out thermosealed non-woven fabrics and get final product.And, as non-woven fabrics 2,4, also can be with a plurality of non-woven fabrics stacked material.
The 1st adhesive layer S1, the 2nd adhesive layer S2, the 3rd adhesive layer S3 are used to make absorbent resin powder 3 attached to the layer on the described non-woven fabrics 2,4,9.So these adhesive layers S1, S2, S3 also can not hinder suction, expand for when preventing the coming off of absorbent resin powder 3, the breathability in the time of can also guaranteeing to use is in addition preferably made netted.
As the binding agent that is used for described adhesive layer S1, S2, S3, can use material of the same race or xenogeneic, its kind is not particularly limited.For example, can use hot melt class binding agents such as phenylethylene elastomers such as rubber-like such as natural rubber class, butyl type rubber, polyisoprene, SIS, SBS, SIBS, SEBS, SEPS, ethylene-vinyl acetate copolymer (EVA), polyester, acrylic compounds, TPO elastomer.The bonding force that preferably has the degree that comes off of the water-absorbing resins after can preventing to absorb water has the material of the degree of stretching of the expansible degree that can follow water-absorbing resins, considers the elastomeric hot melt binding agent of preferred rubber class or phenylethylene from this point.
With adhesive layer S1, S2, when S3 makes reticulate body, from a plurality of nozzles with the binding agent of molten condition with the method (curtain formula nebulization, spiral cladding process) of thread ejection because very easy and preferred.Specifically, if utilize the shape ground arrangement that will a plurality of very little squit hole groups be in line, being provided with near each squit hole can be to spray the curtain formula spray application machine of the gas vent of heated air at a high speed, then by air is blowed to the binding agent with the molten condition of wire ejection from squit hole, many fine fibrous binding agents just can be used as the netted aggregation coating of having adhered at random.In addition, if utilize near hot melt binding agent squit hole, be provided with on 3 above point symmetries ground and can then can on non-woven fabrics, form spiral helicine adhesive layer to the spiral of the gas vent of direction blow gas of the nozzle center spray gun of spraying.And, in the laminar water accepting layer 1A of Fig. 1, represented adhesive layer S1 with the coating of curtain formula nebulization, with the example of S2 with the coating of spiral cladding process.Certainly be not limited to these legends, adhesive layer S1, S2, S3 can freely form.Adhesive layer S1, S2, S3 both can adopt the mode with a plurality of adhesive-coated portion, also can adopt in addition non-woven fabrics comprehensively on the mode of coating adhesive layer.
As employed absorbent resin powder 3 or 7 in laminar water accepting layer 1 or the fiber collection layer 6, can use the material of making by known water-absorbing resins, for example can enumerate water-absorbing resins such as polyacrylic, cellulose family, starch acrylamide nitrile.
Because in laminar water accepting layer 1, absorbent resin powder exist regional 2c up and down by non-woven fabrics 2,4 (or middle non-woven fabrics 9) clamping, in addition, non-woven fabrics 2,4 (or middle non-woven fabrics 9) is sealed in the regional 2a of the non-existence of absorbent resin powder, 2b, and is therefore just restricted in absorbent resin powder 3 can expansible space.So in order to implement the present invention rightly, the amount of absorbent resin powder 3 exists the zone preferably to be made as 100g/m with respect to it
2More than, 250g/m
2Below.This be because, when less than 100g/m
2The time, just be difficult to guarantee enough water absorption, or at the interval that between fiber collection layer 6 and wearer's skin, is difficult to after the expansion keep enough, on the other hand, when surpassing 250g/m
2And when using, then cost can increase.Preferably be made as 130g/m
2More than, 220g/m
2Below, more preferably be made as 150g/m
2More than, 200g/m
2Below.
As mentioned above, on each non-woven fabrics 2,4,9, form adhesive layer S1, S2, S3, scattered absorbent resin powder 3 after, non-woven fabrics 2,4,9 is engaged, whole or partially sealed with the regional 2a of the non-existence of absorbent resin powder, 2b forms sealing 5.
Described sealing is necessary to have not by the intensity of the degree of the expansion damage of resin, as the formation means of this kind sealing, can enumerate heat seal, utilize joint, ultrasound wave joint, stitching of hot melt binding agent etc.In the middle of them, heat seal is preferred owing to non-woven fabrics 2,4,9 can be engaged securely.
In addition, when beyond described two end regions 2a and zone line 2b, when the width of laminar water accepting layer 1 is provided with the non-existence of toner zone abreast, also can with should the zone as sealing.This is because if so, then in manufacturing process, just be easy to laminar water accepting layer 1 is cut off.
The absorption pad that absorbent commodity of the present invention possessed forms by overlapping laminar water accepting layer 1A or 1B on fiber collection layer 6A or 6B.The distortion when preventing that absorbent commodity from using or the distortion of form also can engage prior fiber collection layer 6A or 6B and laminar water accepting layer 1A or 1B fixing with means such as binding agents.But, form space 8 in order not hinder after suction, in addition, in order to ensure the breathability of absorbent commodity etc., adhesive layer preferably is made as netted.As this moment employed binding agent, can use with described laminar water accepting layer 1 in the identical binding agent of employed binding agent.
The absorption pad that obtains as described above as absorber, is made disposable absorbent articles such as disposable pants, disposable diaper, sanitary napkin.Among Figure 11 and Figure 12, represent absorbent commodity of the present invention preferred embodiment.Figure 12 is the X-X line profile in the vertical view of Figure 11.Absorbent commodity 10 is at first between the back foil 12 of the surface sheets 11 of liquid permeability and liquid impermeability, the absorption pad 13 that will possess laminar water accepting layer 1A (also can be 1B) and fiber collection layer 6A (also can be 6B), after sandwiching according to the mode that makes laminar water accepting layer 1A become surface sheets 11 sides, the mode that covers sidepiece according to the bottom from this absorption pad 13 is provided with the sidepiece thin slice 14 of liquid impermeability and forms.
Here, sidepiece thin slice 14 is to prolong among the fixed area A that portion in the foreign side that is located at absorption pad 13 bottoms, engage with surface sheets 11 and back foil 12, in absorption pad 13 tops (wearer's side), width ora terminalis (cardinal extremity junction surface 15) at this absorption pad 13 is located to engage with surface sheets 11, in addition, has the setting area B of holding up upward from cardinal extremity junction surface 15.And sidepiece thin slice 14 has and the roughly equal length of the length of absorbent commodity 10, goes in the before and after end of absorbent commodity 10, with top joint the (not shown) of surface sheets 11.
Described setting area B is folded (interior direction ora terminalis 16) in the width inboard of absorption pad 13, flexible member 17 is set up with extended configuration in direction ora terminalis 16 inside in this, will engage between the sidepiece thin slice 14 with fold joint portion 18 in addition.This kind erect area B when wearing absorbent commodity 10, according to cardinal extremity junction surface 15 as cardinal extremity, direction ora terminalis 16 is erect along the mode of wearer's skin in making, and prevents the transverse leakage of the body fluid of portion between thigh.
As the surface sheets 11 of described liquid permeability, owing to the body fluid (Excreta) that need catch as soon as possible from the wearer, make it to shift the therefore preferred sheeting that uses liquid permeability to absorption pad 13.Specifically, can enumerate the non-woven fabrics of using the hydrophilic fibre that has used cellulose, artificial silk, Cotton Gossypii etc., the non-woven fabrics that has used hydrophobic fibres such as polypropylene, polyethylene, polyester, polyamide, utilize surfactant to handle on its surface and formed the material of liquid permeability, the plastic sheeting etc. that perhaps has a perforate is the sheeting of employed liquid permeability in disposable absorbent article usually.
As the back foil 12 of liquid impermeability, ooze out to the outside of absorbent commodity 10 in order to prevent to be absorbed the body fluid that pad 13 absorbed, preferably use the sheeting of hydrophobicity or liquid impermeability.Preferred employed hydrophobicity nonwoven cloth material (for example spun bonded fabric, melt-blown (meltblown) non-woven fabrics, SMS non-woven fabrics (the lamination non-woven fabrics of spun bonded fabric-melt-blown non-woven fabrics) etc.) or plastic sheeting in disposable diaper (preferred breathable plastics thin film) or their composite can enumerated usually.
As described sidepiece thin slice 14, preferably use the sheeting of hydrophobicity or liquid impermeability.More preferably use described hydrophobicity nonwoven cloth material (spun bonded fabric, melt-blown non-woven fabrics, SMS non-woven fabrics etc.) or breathability or non-breathable plastics thin film (more preferably breathable plastics thin film) or their composite.
The cardinal extremity junction surface 15 that sidepiece thin slice 14 and surface sheets 11 engaged, the fixed area A that sidepiece thin slice 14 and back foil 12 are engaged and with the fold joint portion 18 that engages between the sidepiece thin slice 14 as long as with methods such as heat seal, hot melt binding agent joints, ultrasound wave joint joint.
As the elastic component of setting up in interior direction ora terminalis 16 inside of sidepiece thin slice 14 17, so long as usually in disposable diaper employed elastic component get final product, for example can enumerate polyurethane or natural rubber etc., they can be made strand or film like and use.And these elastic components 17 can adopt extended configuration, utilize hot melt to apply methods such as joint, hot melt binding agent joint, ultrasound wave joint and are attached to interior direction ora terminalis 16 inside.
The length direction rear portion C1 that contacts with wearer's buttocks when wearing of disposable absorbent article 10 shown in Figure 11 is formed on the shape that width has the side exhibition in order to encase buttocks.In addition, length direction pars intermedia C2 is in order to connect airtight and to be made into shape in a narrow margin easily with between wearer's the thigh, thereby attenuates along with the mobile of wearer easily.In addition, the anterior C3 of length direction has not the side exhibition of width that the wearer is caused the degree of sense of discomfort, becomes the disposable absorbent article of approximate Pear-Shaped as a whole.Certainly, the shape of the integral body of disposable absorbent article of the present invention is not limited to described approximate Pear-Shaped shown in Figure 11, can adopt shape arbitrarily such as rectangle or hourglass.
In addition, among Figure 11, though represented to spread all over absorbent commodity 10 the long side direction Zone Full disposed the example of absorption pad 13, but also laminar water accepting layer 1 can be cut off with suitable length, in the ground configuration of top, desired position, only for example also can form the absorbent commodity that between thigh portion is provided with laminar water accepting layer 1.
Below, the preferred manufacture method of the absorption pad of absorbent commodity of the present invention is described.At first, with special-purpose laminar water accepting layer production line make described laminar water accepting layer along long side direction continuous continuous slice shape water accepting layer, after being cut into given width, the coiling tubular.With the production line different with described laminar water accepting layer production line (preferably it being made as the absorbent commodity production line), manufacturing is corresponding to the continuum (continuous fiber set layer) of the fiber collection layer of the lower floor of absorption pad.Then, when from described reel, continuous slice shape water accepting layer being pulled out, when the fiber collection layer on making this thin slice water accepting layer is advanced, coated heat dissolubility binding agent on thereon and the composition surface described laminar water accepting layer.When continuous fiber set layer is advanced, place described laminar water accepting layer thereon, engage and make it integrated.To the punching press of pressurizeing of the continuous absorption pad of gained, make its dimensionally stableization, by being cut to required size, just can obtain one absorption pad.Then, the absorption pad that so obtains is provided between the back foil of the surface sheets of liquid permeability and liquid impermeability with known method in the past, forms absorbent commodity.And, under the situation of area less than the fiber collection layer of described laminar water accepting layer, also coated heat dissolubility binding agent on the laminar water accepting layer of given length can be cut in advance, it is transferred to the suitable position (for example middle section that is equivalent to portion between thigh of absorbent commodity) on the fiber collection layer and after forming absorption pad, imports the absorbent commodity production line.
In addition, when on production line, making one by one the fiber collection layer of absorbent commodity off and on, can be identical with described situation, the laminar water accepting layer and the fiber collection layer that are cut to given length in advance are integrated making, after forming absorption pad, import the absorbent commodity production line, make absorbent commodity.
When making continuous or one fiber collection layer, can adopt the manufacture method identical with known absorbent commodity.For example, as long as on the suction drum side face that is provided with the recess (suction areas) suitable with required fiber collection shape, suction is piled up and is divided silk pulp fiber and absorbent resin powder to get final product.And, have in manufacturing under the situation of fiber 6B of the upside fiber assembly 61 that has peristome 63, as long as on the recess of the side face of described suction drum, form the suitable non-suction areas of shape with peristome 63, suction is here piled up and is divided silk pulp fiber and absorbent resin powder to get final product.
In addition, under peristome 63 is cyclic situation shown in Fig. 9 (c), at first, on upside fiber assembly 61, the bigger opening of the central part that does not have upside fiber assembly 61 only is set earlier, after placing it on the downside fiber assembly 62 that forms with other suction drum, form the central part of upside fiber assembly 61 then with the other suction drum of being located at downstream side, it is prevented to get final product in the central authorities of the bigger opening of described upside fiber assembly 61.
Below, will utilize experimental example that the present invention is further elaborated, but following experimental example does not limit the present invention, the situation of implementing change in the scope that does not break away from purport of the present invention all is contained in the technical scope of the present invention.
[comparative example (example in the past)]
Made between surface sheets and back foil, folder has been established the absorbent commodity of the absorption pad that has possessed the fiber collection layer that is made of upside fiber assembly and downside fiber assembly.
In surface sheets, used the following ventilative non-woven fabrics (surface density of making: 20g/m
2), that is, will be sheath, be the composite fibre surfactant hydrophiling of core with the polyester that cutting after with its cutting, utilizes hot blast to make combination between the fiber, in the thin slice, has used the polyethylene film of the liquid impermeability of thickness 25 μ m overleaf with the polyethylene.
In cotton paper (surface density: 18g/m
2, size: wide 410mm * long 540mm), with the about 1～2g/m of netted coating
2Hot melt binding agent (Japanese Niigata Seimitsu Co., Ltd. system, trade name " MQ-24E ", rubber-like hot melt binding agent), on it, place suction and the branch silk pulp fiber core that has been shaped (surface density: about 185g/m
2), scattered (dispersion volume: 50g/m then thereon equably
2) water-absorbing resins (Nippon Shokubai Co., Ltd's system, trade name " CAS601 ", polyacrylic water-absorbing resins) after, uses from the cotton paper that minute the width ora terminalis of silk pulp fiber core extends out, to divide a pulp fiber core and water-absorbing resins to wrap into, form the downside fiber assembly.
At this above downside fiber assembly, directly with the about 1～2g/m of netted coating
2Hot melt binding agent (with the identical binding agent of employed material in the downside fiber assembly), place cotton paper (surface density: 18g/m
2, size: wide 180mm * long 540mm),, be coated with about 1～2g/m then thereon with netted
2Described hot melt binding agent.To wherein mixing about 78g/m
2Water-absorbing resins (with the identical resin of employed material in the downside fiber assembly), divide silk pulp fiber (a 180～185g/m
2) time, place suction and the branch silk pulp fiber core that has been shaped, formed the upside fiber assembly.
On this upside fiber assembly, be coated with about 10～15g/m with netted again
2The hot melt binding agent after, reach about 83g/m according to area with respect to the upside fiber assembly
2With mode scattered water-absorbing resins.
After the absorption pad with gained is arranged between described surface sheets and the back foil, between these thin slices, utilize the hot melt binding agent will not exist the zone of absorption pad to engage, made the absorbent commodity of comparative example.
[embodiment (example of the present invention)]
Among the embodiment, replace the upside fiber assembly intersperse among in the comparative example and the water-absorbing resins between the surface sheets, use laminar water accepting layer of the present invention, made absorbent commodity.
Laminar water accepting layer is that (coating weight: surface, the back side all are 10g/m with the described hot melt binding agent of netted coating at the inner face of the 1st (face side) non-woven fabrics and the 2nd (rear side) non-woven fabrics
2), adhere to water-absorbing resins here and make.
As the 1st non-woven fabrics, used the fiber cutting that will mix according to the mode that makes rayon fiber and polyester fiber reach the mass ratio of about 7:3, the so-called immeasurability non-woven fabrics (surface density: 40g/m of having carried out the current complexations
2), as the 2nd non-woven fabrics, used the following ventilative non-woven fabrics (surface density of making: 20g/m
2), that is, will be sheath, be the composite fibre surfactant hydrophiling of core with the polyester that cutting after with its cutting, utilizes hot blast to make combination between the fiber with the polyethylene.
Described hot melt binding agent is coated with according to the mode that makes absorbent resin powder exist the width in zone to reach about 15～18mm on non-woven fabrics, exists the non-mode that exists regional width to reach about 7～10mm of absorbent resin powder of interregional separation to adjust each absorbent resin powder according to making.And it is about 180g/m that there is the dispersion volume of the water-absorbing resins in zone in the absorbent resin powder of this moment
2
After with the 1st non-woven fabrics and the 2nd non-woven fabrics joint,, made laminar water accepting layer by the regional heat seal of the non-existence of described absorbent resin powder is formed sealing (sealing width: be about 5mm).
And, reach roughly equal mode according to the integral dose of the absorbent article that makes comparative example and embodiment and adjust.
Use each absorbing articles that obtains as mentioned above, carried out following refluence mensuration.
Refluence mensuration
Use the glass liquid separatory funnel of 300cc, near the central part with the absorbent commodity of gained in vertically disposable inflow embodiment of the artificial urine of 100cc (1% sodium-chloride water solution) and the comparative example.The size end that drips from separatory funnel of this moment is made as 3cm to the vertical dimension of the surface sheets of absorbent commodity.Side by side begin the instrumentation time with the inflow beginning, after having passed through 5 minutes, flowing into the filter paper (Japan filter paper Co., Ltd. system) of placing 10 diameter 150mm on the part, placed the hammer cylindraceous of diameter 150mm, gross mass 7kg then thereon.Mensuration begins through the filter paper quality after 6 minutes from inflow, deducts the filter paper quality (g) after the mensuration the filter paper quality (g) before measuring, and the numerical value (g) of gained as the refluence amount, has been carried out the evaluation (the 1st time mensuration) of refluence.
Then, after having passed through 10 minutes since the 1st time inflow, flow into new artificial urine 100cc once to the part identical with the 1st time mensuration, since the 2nd time inflow after 5 minutes (since the 1st time inflow after 15 minutes), place 10 new filter paper, since the 2nd time inflow after 6 minutes (since the 1st time inflow after 16 minutes), with the 1st time mensuration in the same manner, measured refluence amount (g) (mensuration of the 2nd time).
Identical with the 1st, 2 time, measured refluence amount until 3～5 times.And, be 500cc until the total flux of the artificial urine of the 5th.The results are shown among table 1 and Figure 13.
Table 1
| The 1st time | The 2nd time | The 3rd time | The 4th | The 5th | Add up to | |
| Embodiment | 0.1 | 0.3 | 2.1 | 8.9 | 16.7 | 28.1(g) |
| Comparative example | 0.1 | 2.1 | 11.0 | 25.6 | 28.5 | 67.3(g) |
Find that according to table 1 even the absorbent commodity of embodiment flows into artificial urine repeatedly, the refluence amount is also very little, the increase of its amount is also very little.In contrast, the absorbtivity of the absorbent commodity of comparative example increases, and the refluence amount also increases the artificial urine amount increase of oozing out to the absorbent commodity surface.
The industrial possibility of utilizing
Therefore absorbent commodity of the present invention can use for a long time owing to have the high-absorbable energy, low-level owing to refluence is suppressed at, even therefore use for a long time, also can not pollute wearer's skin, can keep clean. In addition, even be to absorb rapidly urine to wait body fluid absorption body fluid also to be difficult to cause the article with comfortable adherent feeling that lose shape, very useful as disposable diaper or disposable pants.
Claims (5)
1. disposable absorbent article is the disposable absorbent article that possesses absorption pad between the back foil of the surface sheets of liquid permeability and liquid impermeability, it is characterized in that,
Described absorption pad begins from the surface sheets side to have successively: contain absorbent resin powder and do not contain pulp fiber laminar water accepting layer, contain the fiber collection layer of absorbent resin powder and pulp fiber,
And described laminar water accepting layer has: there are the zone in the interior a plurality of absorbent resin powders that wrapped absorbent resin powder, be formed at adjacent absorbent resin powder exists non-existences of absorbent resin powder between the zone regional,
Be wrapped between the multi-disc non-woven fabrics in the absorbent resin powder quilt in the described laminar water accepting layer, the described non-woven fabrics of described laminar water accepting layer is engaged in the non-existence of absorbent resin powder zone, forms sealing,
Described sealing is not by the expansion damage of absorbent resin powder.
2. disposable absorbent article according to claim 1 is characterized in that, described sealing rises to upside on thickness direction by the expansion of absorbent resin powder, produces the space between fiber collection layer and sealing.
3. disposable absorbent article according to claim 1 is characterized in that, the described non-woven fabrics of described laminar water accepting layer in the non-existence of absorbent resin powder zone by deposited.
4. according to any described disposable absorbent article in the claim 1～3, it is characterized in that, described laminar water accepting layer is stacked more than 2 layers, and the absorbent resin powder of each laminar water accepting layer exists the zone stacked according to the mode that roughly overlaps at thickness direction.
5. disposable absorbent article according to claim 1, it is characterized in that, non-woven fabrics in the described laminar water accepting layer is the rectangle with long side direction and width, absorbent resin powder exists the zone continuous along the non-woven fabrics long side direction, and, described absorbent resin powder exists the zone at the non-woven fabrics width, is had region separation and has a plurality of zones by absorbent resin powder is non-.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003067287A JP4502586B2 (en) | 2003-03-12 | 2003-03-12 | Disposable absorbent article |
| JP2003067287 | 2003-03-12 | ||
| JP2003-067287 | 2003-03-12 | ||
| JP2003175148 | 2003-06-19 | ||
| JP2003-175148 | 2003-06-19 | ||
| JP2003175148A JP4416441B2 (en) | 2003-06-19 | 2003-06-19 | Disposable absorbent article |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800063679A Division CN100539976C (en) | 2003-03-12 | 2004-03-12 | Disposable absorbent article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101543443A true CN101543443A (en) | 2009-09-30 |
| CN101543443B CN101543443B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800063679A Expired - Lifetime CN100539976C (en) | 2003-03-12 | 2004-03-12 | Disposable absorbent article |
| CN2009101347668A Expired - Lifetime CN101543443B (en) | 2003-03-12 | 2004-03-12 | Disposable absorbent article |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800063679A Expired - Lifetime CN100539976C (en) | 2003-03-12 | 2004-03-12 | Disposable absorbent article |
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| Country | Link |
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| JP (1) | JP4502586B2 (en) |
| CN (2) | CN100539976C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102711687A (en) * | 2009-12-28 | 2012-10-03 | 利卫多株式会社 | Absorbent article |
| CN104023690A (en) * | 2011-12-27 | 2014-09-03 | 利卫多株式会社 | Water-Absorbent Resin Powder And Absorber And Absorbent Article Using The Same |
| CN104023756A (en) * | 2011-12-27 | 2014-09-03 | 利卫多株式会社 | Absorbent article |
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| JP4340564B2 (en) * | 2004-03-15 | 2009-10-07 | 株式会社リブドゥコーポレーション | Disposable absorbent article |
| JP5185738B2 (en) * | 2008-08-29 | 2013-04-17 | ユニ・チャーム株式会社 | Excrement disposal sheet for pets |
| JP5336138B2 (en) * | 2008-09-26 | 2013-11-06 | 花王株式会社 | Absorbent articles |
| JP5346537B2 (en) * | 2008-10-03 | 2013-11-20 | 花王株式会社 | Absorbent articles |
| JP5306773B2 (en) * | 2008-10-29 | 2013-10-02 | ユニ・チャーム株式会社 | Liquid absorbing structure for worn articles |
| WO2010074208A1 (en) * | 2008-12-25 | 2010-07-01 | 花王株式会社 | Non-woven fabric |
| JP5021719B2 (en) * | 2009-12-18 | 2012-09-12 | 花王株式会社 | Non-woven |
| JP4975091B2 (en) * | 2008-12-25 | 2012-07-11 | 花王株式会社 | Non-woven |
| US8802918B2 (en) | 2008-12-29 | 2014-08-12 | Sumitomo Seika Chemicals Co., Ltd. | Water-absorbent sheet composition |
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| JPH05237146A (en) * | 1992-02-27 | 1993-09-17 | Yamaguchi Midori | Diaper |
| MX213505B (en) * | 1993-02-24 | 2003-04-03 | ||
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| JPH07231911A (en) * | 1994-02-24 | 1995-09-05 | Nippon Shokubai Co Ltd | Water absorbable article |
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| JP2001046435A (en) * | 1999-05-28 | 2001-02-20 | Oji Paper Co Ltd | Absorbent article |
-
2003
- 2003-03-12 JP JP2003067287A patent/JP4502586B2/en not_active Expired - Lifetime
-
2004
- 2004-03-12 CN CNB2004800063679A patent/CN100539976C/en not_active Expired - Lifetime
- 2004-03-12 CN CN2009101347668A patent/CN101543443B/en not_active Expired - Lifetime
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| CN104023756B (en) * | 2011-12-27 | 2016-03-30 | 利卫多株式会社 | Absorbent commodity |
| CN104023690B (en) * | 2011-12-27 | 2016-09-14 | 利卫多株式会社 | Absorbent resin powder and employ absorber and the absorbent commodity of this absorbent resin powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4502586B2 (en) | 2010-07-14 |
| CN101543443B (en) | 2012-07-18 |
| CN100539976C (en) | 2009-09-16 |
| CN1758889A (en) | 2006-04-12 |
| JP2004275225A (en) | 2004-10-07 |
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