CN1976663B - Apparatus for producing absorbing material - Google Patents
Apparatus for producing absorbing material Download PDFInfo
- Publication number
- CN1976663B CN1976663B CN2005800217101A CN200580021710A CN1976663B CN 1976663 B CN1976663 B CN 1976663B CN 2005800217101 A CN2005800217101 A CN 2005800217101A CN 200580021710 A CN200580021710 A CN 200580021710A CN 1976663 B CN1976663 B CN 1976663B
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- China
- Prior art keywords
- superabsorbent polymer
- fiber assembly
- mentioned
- polymer particle
- absorber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
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- Absorbent Articles And Supports Therefor (AREA)
Abstract
The technological problem of the invention is to prevent the gritty touch and the unintended unevenness of absorbing characteristics, which have conventionally appeared in the case of the use of a tow(fiber bundle). In the invention, an absorbing material which has a fiber assembly (21) formed by opening a tow, a high absorbing polymer (54) and a sheet (58) wrapping them, wherein an adhesive is applied at least on the whole or almost whole surface of the part contacting with the high absorbing polymer (54) continuously in a plane form and the high absorbing polymer (54) is adhered to the sheet (58) by the adhesive.
Description
Technical field
The present invention relates to these absorbent commodities of diaper or sanitary napkin, be used for the absorber of absorbent commodity and the manufacturing equipment of absorber.
Background technology
In the past, the absorber that is used for humor absorbent article was in that pulp short fiber and superabsorbent polymer particle is folded fine after on the folded fine drum, and absorbability sheet by wadding etc. is packed it and formed.On the other hand,, proposed the folded slim of alternative short fiber, will be used for the scheme (for example with reference to special table 2001-524399 communique) of absorber by the fibre bundle (fibre bundle) that fiber constitutes in recent years.
Figure 29 represents the structure of the absorber 120 of use fibre bundle in the past.In this absorber 120, after superabsorbent polymer 122 being interspersed among on the zonal fibre bundle 125, the sheet 123 that is coated with bonding agent 124 with pearl is packed.
In addition, as the method for using the absorber of such fibre bundle by the manufacturing of manufacturing line, the applicant has developed following method, promptly, after will being configured on the successive banded sheet by the fiber assembly that successive fibre bundle fiber constitutes successively, as required, with the superabsorbent polymer particle diffusion on fiber assembly, then, folding banded sheet coats the fiber assembly that contains superabsorbent polymer, after this, cut with the interval of regulation along MD direction (linear flow moves direction), make each absorber.
But in the method, existence can not add the problem of superabsorbent polymer wittingly to fiber assembly.In addition, exist the life-span of the cutter blade that is used to cut than lacked the problem that superabsorbent polymer is scattered from cutting position in the past.
Have, there is following problems in the absorber of manufacturing, promptly again, superabsorbent polymer is not almost kept by fibre bundle and sheet, can move freely, have the sensation of " loud, high-pitched sound bundle sound " when hands touches, be not conscious imbalance producing aspect the absorption characteristic of absorbtivity etc.
Patent documentation 1: special table 2001-524399 communique
Therefore, main problem of the present invention is to overcome the problems referred to above point.
Summary of the invention
The present invention who has solved above-mentioned problem is as described below.
[first invention]
First invention is a kind of absorber, is to have fibre bundle is opened fibre and the fiber assembly and the superabsorbent polymer that form, and the absorber that coats their sheet,
It is characterized in that in the part that is provided with superabsorbent polymer at least of sheet whole or roughly whole with continuous planar coating adhesive, has by this bonding agent and the bonding superabsorbent polymer of sheet.
By such formation, because the major part of superabsorbent polymer and sheet are bonding,, can prevent to exist when hands from touching the sensation of " loud, high-pitched sound bundle sound " effectively so superabsorbent polymer is difficult to move, and the non-conscious imbalance of absorption characteristic aspect.
[second invention]
Second invention is a kind of absorber, is to have fibre bundle is opened fibre and the fiber assembly and the superabsorbent polymer that form, and the absorber that coats their sheet,
It is characterized in that, whole or roughly whole of the part that is provided with superabsorbent polymer at least of sheet, the part that is being coated with bonding agent is set, with a plurality of parts that do not have bonding agent of surrounding by the part that is being coated with bonding agent, have the bonding superabsorbent polymer of part and sheet by being coated with bonding agent and be present in the superabsorbent polymer of the part that does not have bonding agent.
By such formation, because superabsorbent polymer and sheet are bonding, or by the encirclement of bonding agent coating part branch, so superabsorbent polymer is difficult to move, can prevent to exist when hands from touching the sensation of " loud, high-pitched sound bundle sound " effectively, and the non-conscious imbalance of absorption characteristic aspect.
[the 3rd invention]
The 3rd invention is in first or second invention, has the superabsorbent polymer bonding with fiber assembly.
According to this 3rd invention, because superabsorbent polymer and fiber assembly are bonding, thus can more effectively prevent to exist when hands from touching the sensation of " loud, high-pitched sound bundle sound ", and the non-conscious imbalance of absorption characteristic aspect.
[the 4th invention]
The 4th invention is a kind of absorber, is to have fibre bundle is opened fibre and the fiber assembly and the superabsorbent polymer that form, and the absorber that coats their sheet,
It is characterized in that the amount of the superabsorbent polymer in the first of fiber assembly is more than the amount of the superabsorbent polymer in the second portion of fiber assembly.
Like this, the part that the amount by superabsorbent polymer is set is relatively many and few part can have conscious imbalance aspect the absorption characteristic of absorber.
[the 5th invention]
The 5th invention is that first is the width pars intermedia of fiber assembly in the 4th invention, and second portion is width two flanks of fiber assembly.
Like this, because the amount of the superabsorbent polymer in the width pars intermedia of fiber assembly is more than the amount of the superabsorbent polymer in width two flanks of fiber assembly, be used under the situation of absorbent commodity, can guaranteeing the absorbtivity of the part that more liquid is supplied to morely.
[the 6th invention]
The 6th invention is that first is the part of the length direction of fiber assembly in the 4th invention, and second portion is another part of the length direction of fiber assembly.
The amount of the superabsorbent polymer in its length direction part of this absorber is more than the amount of the superabsorbent polymer in other parts, and the absorption characteristic that can make absorber is in the length direction difference.
[the 7th invention]
The 7th invention is in the 6th invention, at the length direction both ends, does not have superabsorbent polymer in fact.
According to this 7th invention, during fabrication, under the situation at the length direction both ends of cutting absorber, can prevent the lost of life of cutter blade.
[the 8th invention]
The 8th invention is a kind of absorber, is to have fibre bundle is opened fibre and the fiber assembly and the superabsorbent polymer that form, and the absorber that coats their sheet,
It is characterized in that the density of the superabsorbent polymer in the first of fiber assembly is than the density height of the superabsorbent polymer in the second portion of fiber assembly.
Part and relative few part that density by the superabsorbent polymer in the fiber assembly is set is relatively many can have conscious imbalance aspect the absorption characteristic of the infiltration rate of absorber etc.
[the 9th invention]
The 9th invention is that first is the width pars intermedia of fiber assembly in the 8th invention, and second portion is width two flanks of fiber assembly.
In this case, absorption characteristic is that the infiltration rate of width pars intermedia is slow, and the infiltration rate of two flanks is fast.Therefore, be used under the situation of absorbent commodity, because the peripherad diffusibility of part that is supplied to from more liquid is good, thus bigger area can be used for absorbing, simultaneously, because the infiltration rate of two flanks is fast, so prevented so-called side leakage.
[the tenth invention]
The tenth invention is that first is the length direction pars intermedia of fiber assembly in the 8th invention, and second portion is the front part and the rear section of the length direction pars intermedia of fiber assembly.
In this case, absorption characteristic is that the infiltration rate of length direction pars intermedia is slow, and the front part of length direction pars intermedia and the infiltration rate of rear section are fast.Therefore, be used under the situation of absorbent commodity, because the peripherad diffusibility of part that is supplied to from more liquid is good, so bigger area can be used for absorbing.
[the 11 invention]
The 11 invention is a kind of absorber, is to have fibre bundle is opened fibre and the fiber assembly and the superabsorbent polymer that form, and the absorber that coats their sheet,
It is characterized in that the fibre density in the first of fiber assembly is than the fibre density height of the second portion of fiber assembly.
Fibre bundle is opened fibre and the fiber assembly that forms has the character that makes the liquid diffusion along the continuous direction of fiber, and density is high more, and this tendency is remarkable more.Therefore, part that the fibre density by fiber assembly is set is relatively high and low part also can make the absorption characteristic aspect of absorber have conscious imbalance.
[the 12 invention]
The 12 invention is that first is the width pars intermedia of fiber assembly in the 11 invention, and second portion is width two flanks of fiber assembly.
In this case, because the diffusibility of the body fluid in the width pars intermedia of fiber assembly is than the diffusibility height of the body fluid in width two flanks, so be used under the situation of body fluid absorbent article, in the width pars intermedia that more body fluid is supplied to, body fluid spreads easily, bigger area can be used for absorbing, simultaneously because in width two flanks, body fluid is difficult to diffusion, so prevented so-called side leakage effectively.
[the 13 invention]
The 13 invention is a kind of absorber, is to have fibre bundle is opened fibre and the fiber assembly that forms and the absorber of superabsorbent polymer,
It is characterized in that superabsorbent polymer is dispersed to the inside of fiber assembly, simultaneously, bonding by bonding agent and fiber.
In the absorber of this 13 invention, because superabsorbent polymer is dispersed to the inside of fiber assembly, simultaneously, by bonding agent, bonding with fiber, so compare with the method in the past that only only superabsorbent polymer is spread to fiber assembly, more superabsorbent polymer positively is fixed in the fiber assembly. therefore, reduced the sensation that has " loud, high-pitched sound bundle sound " when hands touches. in addition, be difficult to produce non-conscious imbalance aspect the absorption characteristic of absorbtivity etc., in other words, can make absorption characteristic become conscious mode, for example make it even or inhomogeneous.
[the 14 invention]
The 14 invention is that its fiber weight per unit area of fiber assembly is 30-90g/m in the 13 invention
2, superabsorbent polymer is the particle shape superabsorbent polymer of the population of particle diameter 20-850 μ m more than or equal to all particles several 90%, superabsorbent polymer with respect to the weight per unit area of fiber assembly smaller or equal to 400g/m
2, and, bonding agent with respect to the weight per unit area of fiber assembly more than or equal to 1g/m
2
If fiber weight per unit area, the particle diameter of superabsorbent polymer, the weight per unit area of superabsorbent polymer and the weight per unit area of bonding agent that employing is specific like this, then advantageous particularly aspect the action effect of performance the invention described above.
[the 15 invention]
The 15 invention is a kind of absorbent commodity, it is characterized in that, has the absorber of first-Di, 14 inventions.
According to the absorbent commodity of this 15 invention, can have the advantage of the absorber of first-Di, 14 inventions.
[the 16 invention]
The 16 invention is a kind of absorber manufacturing equipment, it is characterized in that having polymer additional member, polymer mobile member,
The outside of the fiber assembly that this polymer additional member forms to fibre bundle is opened fibre adds superabsorbent polymer;
This polymer mobile member makes gas by having added the fiber assembly of superabsorbent polymer, by the power of passing through of gas, superabsorbent polymer is moved in fiber assembly.
In this 16 invention, because can utilize the power of passing through of gas, superabsorbent polymer is moved in fiber assembly, so compare, more superabsorbent polymer is remained in the fiber assembly well with the method for only only scattering in the past.Therefore, can reduce the sensation that has " loud, high-pitched sound bundle sound " when hands touches.In addition,, in other words, can make absorption characteristic become conscious mode, for example make it even or inhomogeneous being difficult to produce non-conscious imbalance aspect the absorption characteristic of absorbtivity etc.
[the 17 invention]
The 17 invention is in the 16 invention, has the sheet covering member on the face of superabsorbent polymer that covered adding of fiber assembly,
The polymer mobile member from the covering of fiber assembly the face of opposition side of face of sheet attract.
Because under the state as if the side's side that like this sheet is configured in fiber assembly, attract from its opposition side, the captivation that then acts on superabsorbent polymer increases, and superabsorbent polymer efficient is moved better, so best.
[the 18 invention]
The 18 invention is in the 16 or the 17 invention, after having the fiber assembly before additional superabsorbent polymer or adding superabsorbent polymer, and the member of the fiber assembly supply bonding agent before superabsorbent polymer is moved in fiber assembly.
According to this 18 invention, superabsorbent polymer can be adhered to fiber assembly, can more effectively prevent to exist when hands from touching the sensation of " loud, high-pitched sound bundle sound ", and the non-conscious imbalance aspect absorption characteristic.In other words, can make absorption characteristic become conscious mode, for example make it even or inhomogeneous.On the other hand, because during fabrication, the state that is adhered to fibre bundle with superabsorbent polymer transports, so can prevent coming off, disperse or being equipment fault of being caused of reason etc. with it of polymer.
[the 19 invention]
The 19 invention is in the 18 invention, has out fine member and shading member, and this opens fine member by compressed air, and fibre bundle is opened fibre, forms fiber assembly; This shading member covers from this opens the air that fine member blows to the bonding agent supply member.
To use compressed-air actuated opening under the situation of preceding operation that fine member is arranged at the bonding agent supply member, though exist the compressed air that leaks out to flow into the bonding agent supply member along fiber assembly, or make the supply disorder of bonding agent, or make the exsiccant probability of bonding agent, but in the invention of this record, by shading member is set, these problems have been prevented.
[the 20 invention]
The 20 invention is in the 17 invention, has before emulsion sheet, supplies with the member of bonding agent to the face that becomes the fiber collection side of sheet.
According to this 20 invention, superabsorbent polymer can be adhered on the sheet, can more effectively prevent to exist when hands from touching the sensation of " loud, high-pitched sound bundle sound ", and the non-conscious imbalance aspect absorption characteristic.
[the 21 invention]
The 21 invention is in the 17 invention, does not have bonding agent is applied to member on the sheet.
For fixing superabsorbent polymer, or for other purpose, and bonding agent is coated under the situation on the sheet, exist because the bending of fibre bundle, narrowed width (owing to transporting tension force, the phenomenon that the width of length direction pars intermedia is relatively narrow), bonding agent is attached to the situation on the equipment.Therefore, in order to prevent that bonding agent is attached on the equipment and to be the variety of issue that reason produces with it, had better not be on sheet coating adhesive.
[the 22 invention]
The 22 invention is in any one invention in the 16-the 21, has to making fiber assembly after superabsorbent polymer moves in fiber assembly supply with the member of bonding agent.
According to this 22 invention, can be by attracting, make under the state that superabsorbent polymer moves by the mode of hope, be adhered to fiber assembly.Therefore, can more effectively prevent to exist when hands from touching the sensation of " loud, high-pitched sound bundle sound ", and the non-conscious imbalance of absorption characteristic aspect.
[the 23 invention]
The 23 the invention be in the 16-the 22 any one the invention in, the polymer additional member is so that the amount of the superabsorbent polymer in the first of fiber assembly more than the mode of the amount of the superabsorbent polymer in the second portion of fiber assembly, is added superabsorbent polymer.
By being provided with like this, can make the absorption characteristic aspect of absorber have conscious imbalance to the relatively few part of the amount of the additional superabsorbent polymer of fiber assembly and many parts.
[the 24 invention]
The 24 invention is that first is the width pars intermedia of fiber assembly in the 23 invention, and second portion is width two flanks of fiber assembly.
Like this, by so that the amount of the superabsorbent polymer in the width pars intermedia of fiber assembly more than the mode of the amount of the superabsorbent polymer of width two flanks of fiber assembly, additional superabsorbent polymer, be used under the situation of absorbent commodity, the absorbtivity of the part that liquid can be supplied with is more guaranteed more.
[the 25 invention]
The 25 invention is that first is the length direction pars intermedia of fiber assembly in the 23 invention, and second portion is the front part and the rear section of the length direction pars intermedia of fiber assembly.
Like this, by so that the amount of the superabsorbent polymer in the length direction pars intermedia of fiber assembly more than the mode of the amount of the superabsorbent polymer of the front part of the length direction pars intermedia of fiber assembly and rear section, additional superabsorbent polymer, be used under the situation of absorbent commodity, the absorbtivity of the part that liquid can be supplied with is more guaranteed more.
[the 26 invention]
The 26 invention is in any one invention in the 16-the 25, the polymer mobile member make gas to pass through first that masterpiece is used for fiber assembly strong or grow than the second portion that acts on fiber assembly.
Like this, if what gas was set passes through relatively strong part of intensity of force and weak part, or relatively long part and short part of action time be set, the part that the amount of movement that has then produced the superabsorbent polymer in the fiber assembly is relatively many and few part, its result is, produced relatively high part of the density of the superabsorbent polymer in the fiber assembly and low part.Therefore, can make the absorption characteristic aspect of the infiltration rate etc. of absorber have conscious imbalance.
[the 27 invention]
The 27 invention is that first is the width pars intermedia of fiber assembly in the 26 invention, and second portion is width two flanks of fiber assembly.
Like this, if make gas to pass through width pars intermedia that masterpiece is used for fiber assembly strong or grow than width two flanks that act on fiber assembly, then the amount of movement of the superabsorbent polymer in the width pars intermedia of fiber assembly increases than width two flanks, its result is that the density of the superabsorbent polymer in the width pars intermedia of fiber assembly is than the density height of the superabsorbent polymer in width two flanks of fiber assembly.So in this case, absorption characteristic is that the infiltration rate of width pars intermedia is slow, the infiltration rate of width two flanks is fast.Therefore, be used under the situation of body fluid absorbent article, because the peripherad diffusibility of part that is supplied to from more body fluid is good, so bigger area can be used for absorbing, simultaneously, because the infiltration rate of two flanks is fast, so prevented so-called side leakage.
[the 28 invention]
The 28 the invention be in the 16-the 27 any one the invention in, have the fibre density member higher in the first that makes fiber assembly than the fibre density in the second portion of fiber assembly.
Fibre bundle is opened fibre and the fiber assembly that forms has along the character of the continuous direction diffusion liquid of fiber, and density is high more, and this tendency is remarkable more.Therefore, even, also can make the absorption characteristic aspect of absorber have conscious imbalance by high part of fibre density and low part are set in fiber assembly.
[the 29 invention]
The 29 invention is that first is the width pars intermedia of fiber assembly in the 28 invention, and second portion is width two flanks of fiber assembly.
Because the fibre density of the width pars intermedia by making fiber assembly is higher than the fibre density of width two flanks of fiber assembly, make that the diffusibility of the body fluid in the width pars intermedia is better than the diffusibility of the body fluid of width two flanks, so be used under the situation of body fluid absorbent article, the width pars intermedia that can be supplied at more body fluid, body fluid is spread easily, bigger area can be used for absorbing, simultaneously, because width two flanks are difficult to diffusion, so also prevented so-called side leakage effectively.
[the 30 invention]
The 30 invention is a kind of absorber manufacturing equipment, it is characterized in that having the line of transporting and polymer additional member,
This transports line and transports fibre bundle is opened fibre and the fiber assembly that forms;
This polymer additional member is transported fiber assembly on the line at this, makes the additional amount cyclically-varying, and additional superabsorbent polymer.
By having like this at fiber assembly, make the additional amount cyclically-varying, and the polymer additional member of additional superabsorbent polymer, absorption characteristic is changed along carriage direction, or setting have the part of superabsorbent polymer and the part that does not have.
[hentriaconta-invention]
Hentriaconta-invention is in the 30 invention, at by the polymer additional member, has added the fiber assembly of superabsorbent polymer, does not carry out passing through moving of the superabsorbent polymer that caused by gas.
In this case, the structure of the outside that nearly all is positioned at fiber assembly of superabsorbent polymer can be made, that is, the absorber of stromatolithic structure of the layer that has the layer that constitutes by superabsorbent polymer and constitute by fiber assembly can be made.Such absorber then has the fast advantage of infiltration rate if be used for absorbing from the layer side of fiber assembly.
[the 32 invention]
The 32 invention be the 30 or hentriaconta-invention in, the polymer additional member is along the additional off and on superabsorbent polymer of carriage direction, the part of additional superabsorbent polymer alternatively is set and does not have additional part along carriage direction, have in the part of not adding superabsorbent polymer, cut the cutter arrangement of discrete absorber.
People of the present invention carry out studying with keen determination to the problem of the lost of life of above-mentioned cutter blade, find its reason be the general superabsorbent polymer that uses the hardness ratio anticipation want high.The invention of this record is on the basis of this knowledge and produce, by adding superabsorbent polymer and the not cutting of the part of additional superabsorbent polymer off and on, make the possibility that is cut in the part that has superabsorbent polymer hardly, therefore, can avoid the lost of life of cutter blade.In addition, according to the invention of this record,,, can prevent the equipment fault of dispersing and accompanying of polymer with it so superabsorbent polymer is difficult to be scattered from cutting position because have superabsorbent polymer hardly at cutting part.In addition, in the present invention, the part of additional superabsorbent polymer is not meant the not enough 0.01g/cm of weight per unit area of superabsorbent polymer
2Part.
The invention effect
As mentioned above, according to the present invention, can produce above-mentioned various effect.
Description of drawings
Fig. 1 is the axonometric chart of expression shorts type diaper.
Fig. 2 is the vertical view of the shorts type diaper of expression deployed condition.
Fig. 3 is the vertical view of the shorts type diaper of expression deployed condition.
Fig. 4 is the cutaway view of the 1st mode of expression absorber.
Fig. 5 is the cutaway view of the 2nd mode of expression absorber.
Fig. 6 is the cutaway view of the 3rd mode of expression absorber.
Fig. 7 is the cutaway view of the 4th mode of expression absorber.
Fig. 8 is the cutaway view of the 5th mode of expression absorber.
Fig. 9 is the cutaway view of the 6th mode of expression absorber.
Figure 10 is the vertical view of the 7th mode of expression absorber.
Figure 11 is the cutaway view of the 7th mode of expression absorber.
Figure 12 is the vertical view of the 7th mode of expression absorber.
Figure 13 is the cutaway view of the 7th mode of expression absorber.
Figure 14 is the cutaway view of the 7th mode of expression absorber.
Figure 15 is the synoptic diagram that is used to illustrate the direction of absorber.
Figure 16 is the cutaway view of the 8th mode of expression absorber.
Figure 17 is the cutaway view of the 9th mode of expression absorber.
Figure 18 is a vertical view of roughly representing the configuration of absorber.
Figure 19 is the cutaway view of other modes of expression absorber.
Figure 20 is the cutaway view of other modes of expression absorber.
Figure 21 is the cutaway view of other modes of expression absorber.
Figure 22 is the vertical view of the belt diaper of expression deployed condition.
Figure 23 is the 4-4 line cutaway view of Figure 22.
Figure 24 is the synoptic diagram of the manufacturing equipment example of expression absorber.
Figure 25 is the synoptic diagram of expression fiber-opening apparatus example.
Figure 26 is the synoptic diagram of the distribution method of expression superabsorbent polymer particle.
Figure 27 is the synoptic diagram that is used to illustrate the direction of absorber.
Figure 28 is the key diagram of expression assay device.
Figure 29 represents the cutaway view of example in the past.
Symbol description
10 ... Breeches type disposable diaper, 10A ... the belt disposable diaper, 12 ... outer load, 12A ... egative film, 20 ... absorbent main body, 30 ... top flat, 40 ... intermediate, 50 ... absorber, 52 ... long fine, 52X ... bundle, 52Y ... fibre bundle, 52Z ... fiber assembly, 54 ... the superabsorbent polymer particle, 56 ... absorbent cores, 58 ... covering piece, 60,60A ... flap, 64 ... barrier sheet, 70 ... body fluid impermeability sheet, 72 ... the second body fluid impermeability sheet, 80 ... retention tab, 130 ... brace, E ... recess, Z ... superabsorbent polymer particle diffusion district.
The specific embodiment
Below, one side is with reference to diaper shown in the drawings and manufacturing equipment thereof, and one side describes an embodiment of the invention in detail.
[example of Breeches type disposable diaper]
The example of having represented Breeches type disposable diaper among Fig. 1.This Breeches type disposable diaper 10 has the outer load 12 of outside (the inside) side and the absorbent main body 20 of inner face (surface) side, is fixing absorbent main body 20 on the load 12 outside.Absorbent main body 20 is the parts that stop and absorb the body fluid (being menses) that keeps urine or soft stool etc. when sanitary napkin described later.Outer load 12 is to be used for the part that the wearer wears.
The length direction of illustrated absorbent main body 20 (promptly, the above-below direction of Fig. 2. also be the fore-and-aft direction of goods) intermediary width, being shown as the mode shorter than the width that the part that is tied of outer load 12 is joined. the relation of this width also can be opposite, also can be same width.
(absorbent main body)
The absorbent main body 20 of embodiment has top flat 30, intermediate (second) 40 that is made of for example non-woven fabrics that body fluid is seen through etc. and the absorber 50 that contains absorbent cores 56 as shown in Figure 3.In addition, in the inside of absorber 50 side, be provided with the body fluid impermeability sheet (being also referred to as egative film) 70 that constitutes by plastic sheet etc.In the inside side of this body fluid impermeability sheet 70, be provided with outer load 12.Have again, have flap 60,60 in both sides.
(top flat)
Top flat 30 has the character through body fluid.Therefore, the material of top flat 30 be so long as can embody the material of this fluid permeable and get final product, and for example, can express the non-woven fabrics of porose or atresia or porous plastic sheet etc. for example.In addition, with regard to non-woven fabrics, be what is not particularly limited wherein to its raw fibre.For example, can express the natural fiber etc. of the regenerated fiber, cotton etc. of the olefines, polyesters of polyethylene or polypropylene etc., polyamide-based etc. synthetic fibers, artificial silk or cuprammonium rayon etc. for example, and use these both above composite fibre etc.Have, non-woven fabrics can be the non-woven fabrics that manufactures by processing arbitrarily again.As processing method, can express disclosed method for example, for example water acupuncture manipulation, spun-bond process, hot sticky method, meltblown, needle point method etc.For example, if require flexibility, vertical perception, then the water acupuncture manipulation is good processing method, is good processing method if require bulkiness, soft property, then hot sticky method.
In addition, top flat 30 can be to be made of a sheet, also can be to constitute by the resulting lamination sheet of bonding sheet more than 2.Equally, top flat 30 can be to be made of a sheet for in-plane, also can be to constitute by bonding sheet more than 2.
(intermediate)
For the body fluid that has seen through top flat 30 is promptly shifted to absorber, the penetration speed that body fluid can be set is faster than top flat 30, is commonly called the intermediate 40 of " second ".This intermediate not only makes body fluid promptly shift to absorber, improves the absorbent properties of absorber, and can also prevent the body fluid that the absorbed phenomenon from absorber " backflow ", makes the state that always keeps dry on the top flat 30.
Intermediate (second) 40 is between top flat 30 and the covering piece 58.As shown in figure 20, also can use the mode that intermediate (second) 40 is not set.
The intermediate 40 of diagramatic way is shorter than the width of absorbent cores 56, is configured in central authorities, is provided with but also can spread all over whole width ground.The length of the length direction of intermediate 40 can be identical with the length of absorbent cores 56, also can be in the length range of weak point that with the zone that receives body fluid is the center.The representational material of intermediate 40 is non-woven fabrics of fluid permeable excellence.
As intermediate 40, can express for example and top flat 30 identical materials, or the mixing tab of water thorn, process nonwoven pulp fabric, pulp and artificial silk, the sticking or crimped paper of point.Good especially is hot-wind nonwoven cloth and spun-laced nonwoven fabric.
Though the deflection of the fore-and-aft direction of intermediate goods is 0.05-0.75gcm
2/ cm, but the inharmonious sense of " loud, high-pitched sound bundle sound " when being suitable for being used to alleviating face side contact from goods or make it can not produce.Here, " deflection of goods fore-and-aft direction " is that expression is as utilizing pure bending experimental machine (KATO TECH corporate system " KES-FB2 "), at DFE sensitivity 20, curvature range 0.0cm
-1-0.5cm
-1Scope in, the sample that is cut to long 200mm, wide 200mm is carried out the resulting data of value of crooked situation.With regard to covering piece, also be same.
(absorber)
(first mode of absorber)
Fig. 4 represents first mode of absorber, and this absorber 50 has absorbent cores 56 and covering piece 58, and this absorbent cores 56 has fiber assembly 21 and superabsorbent polymer particle 54; This covering piece 58 coats the inside and the side of this absorbent cores 56 at least, on whole or roughly whole of the part that is provided with the superabsorbent polymer particle at least in covering piece 58, with continuous planar coating adhesive 24.In addition, " roughly whole face " expression be provided with superabsorbent polymer part 80%.
In more detail, on the inner face of covering piece 58,, the layer that is made of superabsorbent polymer 22 is being set by bonding agent 24, by bonding agent 25, the layer that is made of fiber assembly 21 is being set also thereon, is having again, on fiber assembly 21, by bonding agent, bonding covering piece 58.Though the covering piece 58 of illustrated example is constituted as by turning back at two flanks, come covered fiber aggregation 21 and superabsorbent polymer particle 54, also can adopt by two sheets up and down and clip the mode of packing.As this covering piece 58, as described later, be fit to use the absorbability sheet of crimped paper or non-woven fabrics etc.
In addition, do not illustrate, on whole or roughly whole of the part that superabsorbent polymer is set at least in covering piece 58, setting is coated with part and applied a plurality of parts that do not have bonding agent that the part encirclement of bonding agent is arranged of bonding agent, can also be constituted as to have and be adhered to the superabsorbent polymer of covering piece 58 and be present in the superabsorbent polymer of the part that does not have bonding agent by the part that is coated with bonding agent.
Being under the continuous planar situation, can use heavy curtain coating or roller coat cloth with bonding agent 24 coatings.In addition, setting be coated with the part of bonding agent and the situation of a plurality of parts that do not have a bonding agent of surrounding by the part that is coated with bonding agent under, can use the spiral coating.As bonding agent 24, suitable use can be used in the thermoplastic resin of the binding agent of fiber assembly described later.
In the example of this first absorber, the major part of superabsorbent polymer particle 54 is bonding by bonding agent 24 and covering piece 58, perhaps the part of superabsorbent polymer particle 54 is bonding by bonding agent 24 and covering piece 58, simultaneously, in the closed space that does not have bonding agent that the major part of superabsorbent polymer particle 54 is limited in being surrounded by the part that is coated with bonding agent.In addition, part or all of superabsorbent polymer particle 54 is bonding by bonding agent 25 and fiber assembly 21.In view of the above, can prevent to exist when hands from touching the sensation of " loud, high-pitched sound bundle sound " and the non-conscious imbalance of absorption characteristic effectively.In addition, the symbol 26 expression bonding agent that the face of fiber assembly 21 and the opposition side polymer side and covering piece 58 is bonding.
(second mode of absorber)
Fig. 5 represents second mode of absorber, and with respect to first mode, difference is also to keep superabsorbent polymer 54 in fiber assembly 21.
(Third Way of absorber)
Fig. 6 represents the Third Way of absorber, and with respect to first mode that superabsorbent polymer 54 only is set at one-sided (downside) of fiber assembly 21, difference is the both sides up and down at fiber assembly 21, and superabsorbent polymer 54 is set respectively.In this case, being positioned at the superabsorbent polymer 54 of the upside of fiber assembly 21 can be bonding by bonding agent 28 and fiber assembly 21.
(the cubic formula of absorber)
Fig. 7 represents the cubic formula of absorber, is in Third Way, also similarly also keeps the mode of superabsorbent polymer 54 in fiber assembly 21 with second mode.
(the 5th mode of absorber)
Fig. 8 represents the 5th mode of absorber, be omitted in second mode with the bonding superabsorbent polymer 54 of covering piece 58 and be used for its bonding bonding agent 25, only in fiber assembly 21, keep the mode of superabsorbent polymer 54.
(the 6th mode of absorber)
Fig. 9 represents the 6th mode of absorber, be with respect to the 5th mode, being provided with separately on the fiber assembly 21 that keeps superabsorbent polymer 54 only is the layer 21B of fiber assembly (not keeping superabsorbent polymer 54), simultaneously, by bonding agent 26B, will keep the fiber assembly 21 of superabsorbent polymer 54 and only be the bonding mode of layer 21B of fiber assembly.
(the 7th mode of absorber)
Figure 10 and Figure 11 represent the 6th mode of absorber 50.This absorber 50 has absorbent cores 56 and covering piece 58, and this absorbent cores 56 has fiber assembly and the superabsorbent polymer that the fibre bundle that is made of fiber is formed; This covering piece 58 coats them, in characteristic aspect, is provided with the relatively many parts of the amount of superabsorbent polymer and few part.What of this amount are in the drawings with deep or light expression of putting.According to such formation, can make absorption characteristic, particularly absorbtivity have conscious imbalance.
Particularly as shown example like that, mostly the amount that makes the superabsorbent polymer among the width pars intermedia 50C of fiber assembly is good mode than the amount of the superabsorbent polymer among the length direction two flank 50S of fiber assembly.In this case, under the situation about using, can guarantee that the absorbtivity of the width pars intermedia 50C that more body fluid is supplied to is more width and absorbent commodity being matched (illustrated example is diaper DP).
In addition, as shown in figure 12, it also is good mode that the amount of the superabsorbent polymer among the length direction pars intermedia 50M of fiber assembly is howed than the amount of the superabsorbent polymer among the 50E before and after the length direction of fiber assembly.In this case, under the situation about using, can guarantee that the absorbtivity of the length direction pars intermedia 50M that more liquid is supplied to is more length direction and absorbent commodity being matched (illustrated example is diaper DP).
In addition, superabsorbent polymer not being set on the cutting part 50e at length direction two ends also is good mode.During fabrication, can prevent the shortening in the life-span of cutter blade.Such mode can be set the additional amount of superabsorbent polymer for three phases (what do not have), by being made by few cycle how much nothing constitutes repeatedly.
On the other hand, in some cases, can also make the amount of the superabsorbent polymer among length direction both ends 50E, the 50E more than the amount of the superabsorbent polymer among the length direction pars intermedia 50M.In addition, though in illustrated example, be that length direction branch with absorber 50 is for three parts of pars intermedia and both ends, but also can be divided into the part more than two or four, make the amount of superabsorbent polymer different respectively, in addition, the amount that also can make superabsorbent polymer changes continuously along the length direction of absorber 50.
In absorber 50, superabsorbent polymer can remain in the fiber assembly, also can remain on the fiber collection surface, or can also be among both at it. have again, also can be that superabsorbent polymer only remains on the part in the fiber collection surface, in fiber assembly, remain on all on.
But, wish at least in the body fluid receiving area, with respect to fiber assembly, make superabsorbent polymer particle (SAP particle) be dispersed in fact thickness direction all on.This is dispersed in the state of thickness direction on all in fact and represents conceptually as the main position enlarged drawing of Figure 13.In addition, the fiber (long fine) of symbol 52 expression formation fiber assemblies among Figure 13.
Top, bottom and pars intermedia in absorbent cores 56 do not have under the situation of SAP particle, not talkative " be dispersed in thickness direction all on ".Therefore, " be dispersed in thickness direction all on " is except with respect to fiber assembly, " equably " be dispersed in beyond the mode of thickness direction on all, though also comprise on top, the bottom and or pars intermedia " inhomogeneous ", but still be dispersed in the mode of the each several part of top, bottom and pars intermedia.In addition, not getting rid of the SAP particle of a part does not invade in the fiber assembly yet, but remain in its surperficial mode, or the SAP particle of a part passes fiber assembly, is in the mode on the covering piece 58 or is in mode on the retention tab 80 as shown in Figure 14.In addition, under the situation of not considering gel blockage, also can be only on top or only inhomogeneous at pars intermedia, under the situation of not considering to reflux, also can be only in pars intermedia or uneven mode only in the bottom.
Though the 7th mode is at least one direction of width, length direction and thickness direction at goods, there is size in the amount of the superabsorbent polymer particle of each several part (below be called the branch bulk density), but as other mode, also can adopt whole direction of width, length direction and thickness direction, make the uniform mode of amount of superabsorbent polymer particle at goods.
Mode to " there is size in superabsorbent polymer dispersion of nano-particles density " is summarized as follows.Now, as shown in figure 15, with regard to absorbent cores 56, as X, length direction is as Y with the width of goods, and thickness direction is as Z, as shown in table 1, if respectively superabsorbent polymer dispersion of nano-particles density is defined as " gathering " than the situation in other zone big (height), the identical situation of superabsorbent polymer dispersion of nano-particles density is defined as " evenly ", then the distinctive effect of each mode is as showing shown in the 2-table 4.Each condition can certainly be used in combination.
[table 1]
| X (width) | The middle gathering | Evenly | Edge portion assembles | |
| Y (length direction) | Abdominal part is assembled | The middle gathering | Evenly | Assemble at the back |
| Z (thickness direction) | The middle gathering | Evenly | The skin face | The underwear face |
[table 2]
With regard to directions X, if " middle assemble " then can be configured in necessary position effectively with SAP, can be with low expense manufacturing, and the SAP loss when making is few.
[table 3]
With regard to directions X, if " evenly ", the inharmonious sense that then SAP caused reduces, and the SAP in the use moves few.
[table 4]
With regard to directions X, if " gathering of edge portion " reduces effectively then that lower limb encloses or flank leaks.Be particularly suitable for using jointly with liner.
(all directions formula of absorber)
Then, Figure 16 represents all directions formula of absorber.This absorber 50 has absorbent cores 56 and covering piece 58, and this absorbent cores 56 contains fiber assembly and superabsorbent polymer; This covering piece 58 coats them, in characteristic aspect, is provided with relatively high part of the density of the superabsorbent polymer in the fiber assembly and low part.The height of this density is in the drawings by layering.Like this, if relatively high part of the density of the superabsorbent polymer in the fiber assembly and low part are set, then can make absorption characteristic, particularly infiltration rate have conscious imbalance.
Particularly as shown example like that, the density that makes the superabsorbent polymer among the width pars intermedia 50C is good mode than the density height of the superabsorbent polymer among the width two flank 50S.In this case, absorption characteristic is that the infiltration rate of width pars intermedia 50C is slow, and the infiltration rate of width two flank 50S is fast.In view of the above, under the situation that width and absorbent commodity is matched and use, because the liquid length direction pars intermedia in width pars intermedia 50C morely is supplied with, from diffusion well towards periphery here, so bigger area can be used for absorbing, simultaneously, because the infiltration rate among the width two flank 50S is fast, so prevented so-called side leakage.
(the 9th mode of absorber)
Then, Figure 17 represents the 9th mode of absorber. this absorber 50 has absorbent cores 56 and covering piece 58, and this absorbent cores 56 contains fiber assembly and superabsorbent polymer; This covering piece 58 coats them, in characteristic aspect, being provided with relatively high part of fibre density in the fiber assembly and low part. the height of this fibre density is in the drawings with thick close expression of line. the character of the fiber assembly that is made of fibre bundle is the continuous direction diffusion liquid along fiber, density is high more, this tendency is remarkable more. in view of the above, even relatively high part of fibre density in the fiber assembly and low part are set, also can make the absorption characteristic of absorber 50 have conscious imbalance.
The height of fibre density like this can perhaps use a plurality of fibre bundles of local harness to wait and realize by locally when making fiber assembly strong opening fibre etc., carrying out imbalance and open fibre.
Particularly as shown example like that, the fibre density that makes width pars intermedia 50C is good mode than the fibre density height of width two flank 50S.Fiber assembly has if fibre density is low, body fluid retentivity excellence then, on the other hand, if fibre density height, the then characteristic of diffusion of body fluids excellence.Therefore, if the difference of this density is set, then in width pars intermedia 50C, body fluid promptly spreads, and in not needing diffusible fast two flank 50S, has improved the body fluid retentivity, has paid the good characteristic in each position.More particularly, because the diffusibility of the body fluid among the width pars intermedia 50C is than the diffusibility height of the body fluid among the width two flank 50S, so under the situation that width and body fluid absorbent article is matched and use, in the width pars intermedia 50C that more liquid is supplied to, body fluid spreads easily, bigger area can be used for absorbing, simultaneously, because in width two flank 50S, liquid is difficult to diffusion, so prevented so-called side leakage effectively.
But irrelevant for what kind of difference with the fibre density of width two flank 50S and width pars intermedia 50C, the fibre density of two flank 50S is 10-100g/m
3For good, be 20-70g/m
3For better, be 30-50g/m
3For the spy good.If the fibre density of two flank 50S is low excessively, then exist fiber assembly to the accumulative probability of width.On the other hand, if the fibre density of both side ends is too high, then there is the probability that causes inharmonious sense to the wearer.
(configuration of absorber)
In addition, Figure 18 represents the configuration example of the absorber among diaper DP or the sanitary napkin NP.Fibre bundle is opened the continuous direction (flow direction) that fine fiber assembly has at fiber makes diffusion of body fluids easily, but with the orthogonal direction of continuous direction of fiber, the characteristic that body fluid is difficult to spread.Therefore, though wish absorber 60 as Figure 18 (a) (b) shown in, the continuous direction of fiber (by the performance of many lines) is arranged to length direction (fore-and-aft direction) along article, but also can as Figure 18 (c) (d) shown in, the continuous direction of fiber is arranged to width along article.If with the continuous direction of the fiber length direction as article, then liquid also can promptly spread at length direction, can effectively utilize absorber 50 whole.
(fiber assembly)
Fiber assembly is to form by the fibre bundle (fibre bundle) of the fine bundle of the conduct length that is counted as continuous fiber is in fact opened fibre, is long fine aggregation.As the fiber that constitutes fibre bundle, though can use for example polysaccharide and derivant (cellulose, cellulose esters, chitin, chitosan etc.), synthetic high polymer (polyethylene, polypropylene, polyamide, polyester, Port リ ラ Network タ ア ミ De, polyvinyl acetate etc.) etc., preferably cellulose esters and cellulose.
As cellulose, can use the cellulose of plant-derived bodies such as silk floss, cotton linters, wood pulp or Bacterial cellulose etc., also can be the regenerated cellulose of artificial silk etc., the fiber that regenerated cellulose can be spinned.
As the cellulose esters that is fit to use, can use for example polyacetates element, butyrate cellulose (せ Le ロ one ス Block チ レ one ト), organic acid esters such as cellulose propionate, cellulose acetate propionate, acetylbutyrylcellulose, cellulose acetate-phthalate, the cellulose esters derivant of the nitration mixture ester of nitric acid cellulose acetate etc. and polycaprolactone grafted cellulose ester etc. etc. these cellulose esters can separately or be use mixing two or more. and the viscosity average polymerization degree of cellulose esters for example is 50-900, preferably the degree of 200-800. and the average degree of exchange of cellulose esters for example is the degree of 1.5-3.0 (for example 2-3).
The average degree of polymerization of cellulose esters for example can be 10-1000, and that good is 50-900, is more preferably the degree of 200-800, and the average degree of exchange of cellulose esters for example can be the degree of 1-3, and good is the degree of 1-2.15, is more preferably the degree of 1.1-2.0.The average degree of exchange of cellulose esters can be selected from the viewpoint that improves biological degradability etc.
As cellulose esters, suitable is organic acid esters (for example being the organic acid ester of the degree of 2-4 with the charcoal prime number), and specially suitable is the polyacetates element.The acetify degree of polyacetates element mostly is the degree of 43-62% greatly, if the degree of 30-50% particularly, then because biological degradability is also excellent, so good.Good especially polyacetates element is a cellulose diacetate.
The fiber that constitutes fibre bundle also can contain various additives, for example, and heat stabilizer, coloring agent, oil preparation, efficient promoter, whiteness modifying agent etc.
The fiber number that constitutes the fiber of fibre bundle can for example be the 1-16 danier, and good is the 1-10 danier, is more preferably the degree of 2-8 danier.The fiber that constitutes fibre bundle also can be non-crinkled fibre, but crinkled fibre preferably.The degree of crispaturaing of crinkled fibre can for example be per inch 5-75, and good is 10-50, is more preferably 15-50 degree.In addition, most cases uses the crinkled fibre of crispaturaing equably.If use crinkled fibre, then can make bulk and lightweight absorbent cores, simultaneously, can easily make the higher fibre bundle of integraty by interfibrous interlacing.Cross sectional shape to the fiber that constitutes fibre bundle is not particularly limited, and for example can be the shape arbitrarily of circular, oval, abnormity (for example Y word shape, X word shape, I word shape, R word shape etc.) or hollow form etc.The fiber that constitutes fibre bundle can be according to by will be for example 3,000-1, and 000,000, good is 5,000-1, the ultimate fibre of 000,000 degree tie up and the form of the fibre bundle (fibre bundle) that forms is used.Fibre bundle is preferably with 3,000-1, the continuous fiber boundling of 000,000 degree and constituting.
Fibre bundle is because a little less than the interfibrous interlacing, so mainly be shaped as purpose to keep, can use to have the contact portion of fiber is carried out binding agent bonding or the welding effect.As binding agent, except the esters plasticizer of glyceryl triacetate, triethylene-glycol diacetate (ト リ エ チ レ Application グ リ コ one Le ジ ア セ テ one ト), triethylene glycol dipropionate (ト リ エ チ レ Application グ リ コ one Le ジ プ ロ ピ オ ネ one ト), phthalate, dimethoxy-ethyl phthalate ester (ジ メ ト キ シ エ チ Le Off タ レ one ト), triethyl citrate etc., can also use various resin adhesives, particularly thermoplastic resin.
In the thermoplastic resin that uses as binding agent, contain the resin that embodies bonding force by melting and solidification, and be water-insoluble or slightly water-soluble resin and water-soluble resin.As water-insoluble or slightly water-soluble resin and water-soluble resin, can also use simultaneously as required.
As water-insoluble or slightly water-soluble resin, can use for example polyethylene, polypropylene, ethylene-propylene copolymer, the monomer of the olefines of ethylene-vinyl acetate copolymer etc. or copolymer, polyvinyl acetate, the polymethyl methyl ester, metering system methyl ester-acrylate copolymer, the allyl resin of the copolymer of (methyl) propylene class monomer and styrene monomer etc., polrvinyl chloride, vinyl acetate-chloride copolymer, polystyrene, the styrenic polymer of styrene monomer and the monomeric copolymer of (methyl) propylene class etc., even the polyester that degeneration is also no problem, nylon 11, nylon 12, NYLON610, the polyamide of nylon 612 etc., rosin derivative (for example rosin ester etc.), hydrocarbon resin (Oleum Terebinthinae resin for example, dcpd resin, Petropols etc.), hydrogenated hydrocarbon resins (the plain carbonization water element that adds of water) etc.These thermoplastic resins can use one or more.
As water-soluble resin, can use various water soluble polymers, for example polyvinyl alcohol, polyvinylpyrrolidone, polyvinylether, vinyl monomer and carboxyl, sulfone acidic group or with the vinyl water-soluble resin of the copolymer of the co-polymerized monomer with these salt etc., propylene class water-soluble resin, polyalkylene oxide, water-soluble polyester, water soluble polyamide etc.When these water-soluble resins can use separately, also can use by two or more combinations.
In thermoplastic resin, can add the various additives of the stabilizing agent, filler, plasticizer, antiseptic, antifungus agent etc. of antioxidant, UV absorbent etc.
But, under possible prerequisite, should avoid using the adhesive ingredients that harms the intrusion of superabsorbent polymer particle.Preferably do not use and harm the adhesive ingredients that the superabsorbent polymer particle is invaded.
Because fibre bundle is made by known method, so be not elaborated.Be suitable for the big part of fibre bundle of the cellulose diacetate of absorber 50, by セ ラ ニ one ズ company or ダ イ セ Le chemical industry etc. in market sale.The big part density of the fibre bundle of cellulose diacetate is about 0.5g/cm
3, gross weight is 400-600kg.
From this big fibre bundle of tearing, open the wide band shape of fine one-tenth with size, the volume of hope.The fine width of opening of fibre bundle can be any, for example, can be wide 100-2000mm, and the width of goods absorbent cores that good is is the degree of 100-300mm.In addition, by adjusting the fine degree of opening of fibre bundle, can adjust the density of absorbent cores.
As fiber assembly, the fibre density that suitable is when thickness is 10mm is smaller or equal to 0.0075g/cm
3, in particular for 0.0060-0.0070g/cm
3Fiber assembly.If fibre density is too high, then use advantage to reduce by fibre bundle being opened the fiber assembly that fibre forms, for example, be difficult to seek lightweight and slimming.In addition, the weight per unit area of fiber assembly is 30-300g/m
2, that good especially is 30-90g/m
2The fiber weight per unit area can be adjusted by creating conditions to the fibre bundle that is selected to the reel material or according to it.
Fiber opening method as fibre bundle, for example can use the fibre bundle lash is opened on the fine roller a plurality of, along with advancing of fibre bundle, the width that enlarges fibre bundle gradually opens fine method, carry out the tension (elongation) of fibre bundle and lax (contractions) repeatedly opens the method etc. that fine method, use compressed air expansion width are opened fibre.
(superabsorbent polymer)
As superabsorbent polymer, starch based, cellulose family and synthetic polymer class etc. are arranged, can use starch-acrylic acid (salt) graft copolymer, saponified, the cross-linking agent of sodium carboxymethyl cellulose of starch-acrylonitrile copolymer and polymer of acrylic acid (salt) etc.
As the shape of superabsorbent polymer, normally used particle shape is just suitable, but also can use other shape.The superabsorbent polymer particle is to represent also to comprise the meaning of " powder body " except that " particle ".The particle diameter of superabsorbent polymer particle can directly use the diameter of the particle that is used for this absorbent commodity, and for example, 20-850 μ m is fit to use.Specifically, can use the superabsorbent polymer particle of following such characteristic.
Averaged particles footpath: about 350 μ m
Particle size distribution
850μm?on：0％
500μm?on：12.2％
250μm?on：75.7％
180μm?on：8.8％
106μm?on：2.4％
106μm?pass：0.9％
Primary particle footpath: 110-120 μ m
Performance as superabsorbent polymer, can not add special qualification ground uses, but be fit to use the superabsorbent polymer of water absorption more than or equal to 50g/g. in addition, as superabsorbent polymer, be fit to use absorption speed smaller or equal to 45 seconds superabsorbent polymer. if absorption speed was above 45 seconds, then be easy to generate to supply to and absorb intravital body fluid and turn back to the outer so-called backflow phenomenon of absorber. have again, as superabsorbent polymer, be fit to use the superabsorbent polymer of gel strength more than or equal to 900Pa. in view of the above, even, also can suppress the surface adhering sense after body fluid absorbs effectively by using fibre bundle to become under the situation of bulk absorbent cores.
The weight per unit area of superabsorbent polymer can be mutually should absorber the desired absorbtivity of purposes and determine rightly.Therefore, can not for example can be smaller or equal to 400g/m without exception
2If the weight per unit area of polymer is too small, then can not keep absorbent properties, otherwise if excessive, then not only effect is saturated, and because the surplus of superabsorbent polymer particle produces the sensation of above-mentioned " loud, high-pitched sound bundle sound ".
As described in the 7th above-mentioned mode, the superabsorbent polymer particle can scatter density or dispersion volume in the in-plane adjustment of absorbent cores 56.For example, can make dispersion volume more than other position in the drain site of body fluid.Under the situation of considering men and women's difference, the men's distribution density (amount) that can improve the front side, the lady's distribution density (amount) that can improve central part.In addition, at the in-plane of absorbent cores 56, (for example mottled) is provided with the part that does not have polymer partly.
Can as the superabsorbent polymer particle, prepare the different majority of particle size distribution as required, scatter projection at thickness direction successively.For example, superabsorbent polymer particle diffusion member 90 devices spaced apart described later are disposed along a plurality of line directions, after formerly that particle size distribution is the little particle diffusion projection, by scattering the big particle of projection particle size distribution, can make the downside of the little distribution of particles of particle size distribution in absorbent cores 56, make the big distribution of particles of particle size distribution at upside.This mode is because can make the little particle of particle size distribution invade in the fiber assembly very darkly, so effectively.
The ratio left and right sides absorption characteristic of superabsorbent polymer and fiber assembly.As the weight ratio in the area of plane of the 5cm * 5cm in the zone of the direct reception body fluid in the absorbent cores 56, hope is that superabsorbent polymer/fibre weight is 1-14, wishes it is 3-9 especially.
(dimensional weight of absorbent cores)
On the other hand, the size of absorbent cores 56 wishes that its plane projection area is more than or equal to 250cm
2, and its thickness is 0.5-10mm, especially 1-5mm.If the size of absorbent cores then in the increase that can not cause weight and thickness, cost, has improved on the basis of nerve in this scope, and is extremely beneficial.In addition, preferably the weight of absorbent cores is smaller or equal to 25g, preferably 10-20g and constituting.If the weight of absorbent cores is in this scope, the advantage of then not using special-purpose member to bring is remarkable especially.
(compression property of absorbent cores)
That the elasticity of compression distortion RC of absorbent cores 56 is good is 40-60%, and that good especially is 50-60%.In view of the above, can pass through absorbent cores itself, bring into play sufficient nerve.
Have again, if the compression energy WC of absorbent cores 56 is 4.0-10.0gfcm/cm
2, then in when packing, can with identical in the past level, or be higher than compression compactly ago.
These compression properties can be by owing to open the adjustment of selected degree of treatment of kind of binding agent of selected, plasticizer etc. of adjustment, the fibrous raw material of the fibre density of the fiber assembly that fibre etc. carries out, or these combination waits and adjusts.
Here, compression energy (WC) is meant the energy consumption of when the central part of the test film that is tailored to long 200mm, wide 50mm is pushed with 50g (embodiment is the thickness of this moment).
This compression energy can be measured by portable compact testing machine (KES-G5, KATO TECH corporate system).Condition determination under this testing machine situation is the kind of SENS:2, ergometer: 1kg, SPEED RANGE:STD, DEF sensitivity: 20, pressurization area: 2cm
2, obtain at interval: 0.1 (standard), STROKE SET:5.0, upper limit load: 50gf/cm
2
On the other hand, elasticity of compression distortion (RC) is the parameter of the recovery of expression fiber when being compressed.Therefore, if recovery is good, then elasticity of compression distortion is big.This elasticity of compression distortion can be measured by portable compact testing machine (KES-G5, KATO TECH corporate system).Condition determination under this testing machine situation is identical with the situation of above-mentioned compression energy.
(covering piece)
As covering piece 58, can use medicated napkin, particularly crimped paper, non-woven fabrics, multi-layer nonwoven fabrics, have the sheet of aperture etc.But hope is the sheet that the superabsorbent polymer particle can not be separated out.At alternative crimped paper, use under the situation of non-woven fabrics, hydrophilic SMMS (water sting/melt and spray/melt and spray/the water thorn) non-woven fabrics is suitable especially, and its material can be used polypropylene, polybutene/polypropylene etc.Weight per unit area wishes it is 8-20g/m
2, special hope is 10-15g/m
2
This covering piece 58 except being layer all mode of covered fiber aggregation and superabsorbent polymer particle 54, can also only coat the inside and the side of this layer as shown in Figure 3 for example as shown in figure 19.In addition, though not shownly go out, it also can be the top and side that only covers absorbent cores 56 with crimped paper or non-woven fabrics, mode below covering with the body fluid impermeability sheet of polybutene etc., with crimped paper or non-woven fabrics cover absorbent cores 56 above, cover side and following (these each raw materials are the element of covering piece) such as modes with the body fluid impermeability sheet of polybutene etc.If be necessary, though also can be to use two-layer mode that clips the layer of fiber assembly and superabsorbent polymer particle 54 up and down, or only with fiber assembly and superabsorbent polymer particle 54 the layer be configured in below above mode, but, because be difficult to prevent moving of superabsorbent polymer particle, so be not desirable mode.
(retention tab)
In addition, among Figure 14, represented that schematically the situation of superabsorbent polymer particle is set or be contained in superabsorbent polymer particle in the absorbent cores 56 below absorbent cores 56, separated out, collected in the situation on the retention tab 80 from fiber assembly from being fabricated onto the stage that consumer uses.
Material to retention tab 80 is not particularly limited, and gets final product so long as have the maintenance performance of absorbable polymer.Specifically, for example can express non-woven fabrics for example, the pulp of crispaturaing, low absorbefacient cotton fiber (for example, cotton fiber, the rayon fiber to unskimmed cotton fiber, defat carried out processing etc. with waterproofing agent or hydrophobizers), polyethylene fibre, polyester fiber, tacryl, polypropylene fibre, thin,tough silk, cotton, fiber crops, nylon, polyurethane, acetate fiber etc.
In retention tab 80 is under the situation of non-woven fabrics, and that these retention tab 80 its compression energies of testing based on KES are good is 0.01-10.00gfcm/cm
2, be more preferably 0.01-1.00gfcm/cm
2, and its elasticity of compression is out of shape good to be 10-100%, to be more preferably the non-woven fabrics of 70-100%.In addition, the deflection of the goods fore-and-aft direction of retention tab 80 is 0.05-0.75gcm
2/ cm is the inharmonious sense of " the loud, high-pitched sound bundle sound " of cause because can alleviate or not produce because of the superabsorbent polymer particle, so fine.Here, " deflection of goods fore-and-aft direction " is that expression is as utilizing pure bending experimental machine (KATO TECH corporate system " KES-FB2 ") at DFE sensitivity 20, curvature range 0.0cm
-1-0.5cm
-1Scope in, the sample that is cut to long 200mm, wide 200mm is carried out the resulting data of value of crooked situation.
The reason that retention tab 80 is set is the mode that contacts with in advance, keeps for example absorbable polymer from absorbent cores 56 whereabouts (disengaging) to the below.Therefore, with regard to the superabsorbent polymer particle that breaks away from, because be to contact with user, so there is not the probability of passing user as the inharmonious propagated sensation of " loud, high-pitched sound bundle sound " by covering piece 58 and retention tab 80.Particularly, if the non-woven fabrics of above-mentioned compression energy and elasticity of compression distortion is then given full play to the function as retention tab.
In addition, because being held sheet 80, the absorbable polymer that breaks away from keeps, on covering piece 58, do not move, so there is not the unbalanced probability that produces absorbability. particularly, because having prevented the superabsorbent polymer particle moves on retention tab 80, so can be in advance hot-melt adhesive with tackness etc. be coated on the retention tab 80. in addition, also can be exasperate by top (towards the face that uses the face side) that makes retention tab 80, prevent that the superabsorbent polymer particle from moving on retention tab 80. as being used for the means that exasperateization or feather are holded up, can listing and when making non-woven fabrics, make it not to be wire side and be the polishing processing of non-wire side, the processing of being undertaken by needle point method, scratch brushing processing etc.
Above-mentioned example is the example that retention tab 80 is set between the side, the inside of absorbent cores 56 and covering piece 58, retention tab 80 can be compared inside side (this mode not shown go out) with covering piece 58, also retention tab 80 can be set separately, but make covering piece 58 own as retention tab performance function, generally speaking, as long as with respect to absorbent cores 56, retention tab is arranged on the inside side, the inharmonious sense of " creak sound " in the time of can alleviating from the contact of the inside of goods, or make it can not take place.
(body fluid impermeability sheet)
Body fluid impermeability sheet 70 only represents to be configured in the sheet of the inside side of absorbent cores 56, in the present embodiment, be and top flat 30 between the sheet of absorbent cores 56 is arranged.Therefore, its material of this body fluid impermeability sheet is not particularly limited.Specifically, can express the olefine kind resin of for example polyethylene or polypropylene etc. for example or nonwoven fabric laminate is had waterproofing membrane to multi-layer nonwoven fabrics, the centre of polythene strip etc., guaranteed the non-woven fabrics (in this case, constituting body fluid impermeability sheet) of opaque liquid etc. in fact by waterproofing membrane and non-woven fabrics.Certainly, in addition, can also express for example in recent years from preventing air-locked viewpoint, opaque liquid that is used preferably and material with poisture-penetrability.As this opaque liquid and have the sheet of the material of poisture-penetrability, for example can express inorganic filler is being mixed in the olefine kind resin of polyethylene or polypropylene etc. for example, form sheet after, extend and little porous sheet of obtaining at one or two direction of principal axis.
Though body fluid impermeability sheet 70 can be by extending (not shown go out) at use face in the mode of so-called outstanding winding, prevent the side leakage of body fluid, but in embodiment, at side leakage, be to prevent by the second body fluid impermeability sheet 72 is between the dual barrier sheet 64 that forms flap 60.According to this mode, because the second body fluid impermeability sheet 72 extends to the position that flap 60 is holded up, so can prevent from addition transmitting on the top flat 30 and the advantage of the side leakage of the body fluid of horizontal proliferation or the soft stool between the flap 60,60.
(flap)
Be arranged on the flap the 60, the 60th of the both sides of goods, transmit and along the urine or the soft stool that laterally move, prevent side leakage and be provided with, but it is an additional element in order to stop on top flat 30.
Illustrated flap 60 is that to make barrier sheet be the dual article that form, and is formed the part that covering folds into from the below of the inside side direction top flat 30 of absorbent cores 56, protrudes in face side.On top flat 30, to transmit and, between particularly that the sidepiece insertion of body fluid impermeability sheet 70 is the dual non-woven fabric plate, extend in the way of the flap 60 that protrudes in face side in order to stop along the urine that transverse direction moves.
In addition, the shape of flap 60 self can suitably design, in illustrated example, at the leading section and the pars intermedia of the protuberance of flap 60, elastic telescopic parts for example line style rubber 62 are fixed under stretching, in user mode, by its contractility, flap 60 is holded up.Compare with the line style rubber 62,62 of leading section at the line style rubber 62 of pars intermedia and to be positioned at center side, and be fixed under the relation of end, front and back of top flat 30, as shown in Figure 3, the base portion side of flap 60 becomes to center side holds up obliquely, begins the mode that leading section is holded up laterally obliquely from pars intermedia.
The material of barrier sheet can have the character that body fluid is seen through, also can have the character that body fluid is seen through, its kind is not particularly limited. for example, can use and the material identical materials of give an example and representing as top flat 30 or body fluid impermeability sheet 70. still, from preventing that skin contact or friction from causing the viewpoint of macule etc., good is non-woven fabrics, is more preferably such bulk non-woven fabrics such as heat production wind non-woven fabrics.
In addition, can be used alone or in combination water preventing ability non-woven fabrics or hydrophilic non-woven respectively according to the function of being paid attention to.For example, if pay attention to preventing the infiltration of body fluid, or improve contact skin sense etc., then good is the water preventing ability non-woven fabrics, for example coated processing non-woven fabrics that blocks water that silicon class, paraffin class, ア Le キ Le Network ロ ミ Star Network Network ロ リ De class waterproofing agent etc. are arranged.On the other hand, if pay attention to body fluid absorption, then good is hydrophilic non-woven, for example, except that the non-woven fabrics that constitutes by hydrophilic natural fiber, synthetic fibers, regenerated fiber etc., can also use the non-woven fabrics that non-hydrophilic fibre was carried out hydrophilic treated by hydrophilizing agent.
(elastic telescopic parts)
As the elastic telescopic parts, get final product so long as have the material of retractility, its kind is not particularly limited.For example, can express flexible hot melt material, self-adhering film, line style rubber, flat pattern rubber etc. for example.In addition, as raw material, for example can express foaming body of the rubber of phenylethylene, olefines, carbamates, esters or polyurethanes, polyethylene, polystyrene, butylbenzene, silicon, polyester etc. etc. for example.
(embossing processing)
Also can begin to form the recess E that produces by embossing at thickness direction from the face side of top flat 30.In this case, except only on top flat 30, forming the recess E that produces by embossing, also can or shown in Figure 21 (a), form the recess E that produces by embossing at top flat 30 and intermediate 40 on both, or shown in Figure 21 (b), to arrive a part or roughly all modes of the thickness direction of absorbent cores 56 from the face side of top flat 30, the recess E that formation produces by embossing, or shown in Figure 21 (c), to arrive the mode of retention tab 80 from the face side of top flat 30, form the recess E that produces by embossing.From being condition not hinder liquid permeability, can carry out the aspect of embossing processing fully, in order to form the recess E that produces by embossing on both, wish to be 8-40g/m at weight per unit area as intermediate 40 at top flat 30 and intermediate 40
2, thickness is in the scope of 0.2-1.5mm, as top flat 30, is 15-80g/m at weight per unit area
2, thickness is in the scope of 0.2-3.5mm.
In addition, can on top flat 30, not form recess yet, only on intermediate 40, form the recess that produces by embossing, have again, can on top flat 30 and intermediate 40, not form recess yet, only on absorbent cores 56, form the recess that produces by embossing, in addition, can on top flat 30, intermediate 40 and covering piece 58, not form recess yet, only on absorbent cores 56, form the recess that produces by embossing.
Recess E has the effect that the direction lead body fluids in its extension makes it to spread.Therefore, if make recess E groove shape ground continuous (the empty standard widths of a room in an old-style house of a plurality of recesses are divided into row, and the situation that forms a groove is also included within interior) in fact, then body fluid is before arriving absorbent cores, recess E at the face side layer transmits diffusion, the part widely of absorbent cores can be used for absorbing.Therefore, the absorptive capacity of goods integral body increases, and becomes to be difficult to produce because the absorbent commodity from the leakage or the backflow of side that the absorptive capacity deficiency causes.
On the other hand, though compare with pulp thing in the past by the absorbent cores 56 that fibre bundle constitutes, rigidity reduces easily, but because if can on absorbent cores 56, form the recess that produces by embossing, then can improve rigidity, though it is so fine. not shown, but in order to improve the rigidity of absorber 50, also is good mode from the inside side (for top flat 30 sides the is opposition side) beginning of absorbent cores 56 at the recess that thickness direction forms by the embossing generation. in order to form the recess of this inside side, can be with from retention tab 80, covering piece 58, the inside side of body fluid impermeability sheet 70 or outer load 12 begins to arrive the mode of absorbent cores 56 and carries out embossing processing integratedly. in addition, the recess of the inside side although it is so preferably forms with the recess E of face side, but also can not form the recess E of face side, only form the recess of the inside side. recess is being located under the situation of the exterior and the interior both sides, the mode of recess can be that the exterior and the interior is common, in addition, also can make the exterior and the interior difference.
The recess that produces by embossing has the effect that the direction lead body fluids in its extension makes it to spread.In addition, improve inflexible effect in addition.Therefore, wish to consider that these effects decide the mode of the recess that produces by embossing.For example, recess can also be the recess of a plurality of recess devices spaced apart point-like ground configuration except being in fact outside the successive recess in groove shape ground (the empty standard widths of a room in an old-style house of a plurality of recesses are divided into row, in the situation that forms a groove is also included within).In addition,, can adopt length direction, the width of the recess of groove shape or point-like along goods as plane pattern, and reciprocal mode zigzag (Canis familiaris L. tooth shape) or configuration brokenly of the cancellate width that they are combined etc.Have again, also can adopt suitable manner such as needle-like, coniform, Serpentis abdomen shape.
(other)
In addition, though not shownly go out, each component parts of absorbent main body 20 can interfix by hot-melt adhesive etc.Under the situation of coating adhesive, can coated portion and non-coated portion be set wittingly at bonding plane.In addition, bonding agent can be coated with by heavy curtain, slit, spiral, control joint (coating of Ω font), pearl coating etc.
(example of belt disposable diaper)
On the other hand, Figure 22 and Figure 23 represent the example of belt disposable diaper.Figure 23 is the 4-4 alignment view among Figure 22, but at absorbent main body 20, illustrates slightly turgidly.
Belt disposable diaper 10A has the brace of the dorsal part both side ends that is installed in diaper, on the stationary plane of this brace, has the element of having contact with, simultaneously, making the egative film of the inside that constitutes diaper is the nonwoven fabric laminate body, when wearing diaper, be can be with the diaper of optional position that element is engaged to the surface of egative film that has contact with of brace.
Absorbent main body 20 has absorbent cores 56 between top flat 30 and body fluid impermeability sheet 70.These absorbent cores 56 whole covering pieces that are made of medicated napkin 58 coat, and overlook to be rectangle.Between absorbent cores 56 and covering piece 58, retention tab 80 is set.
Have again, between top flat 30 and absorbent cores 56, intermediate 40 is arranged.Body fluid impermeability sheet 70 is the rectangle wideer than absorbent cores 56, in its foreign side the egative film 12A that the non-woven fabrics by hourglass shape constitutes is set.
Top flat 30 is the rectangle wideer than absorbent cores 56, extends to foreign side slightly from the lateral margin of absorbent cores 56, is fixed by hot-melt adhesive etc. with body fluid impermeability sheet 70.
Both sides at diaper, formation is to the side-prominent flap A of use face, at successive barrier sheet 64 and the elastic telescopic parts that are made of non-woven fabrics of width, for example the line style rubber 62 that encloses with the elastic telescopic parts as one or more lower limb that is made of line style rubber constitutes this flap 60A by in fact.The 130th, glue the brace that chain constitutes by nylon.
The inner face of barrier sheet 64 has fixedly top in the position of the lateral margin that leaves top flat 30, and fixedly top is to the extension edge of body fluid impermeability sheet 70 from this, and width foreign side part is fixed by hot-melt adhesive etc.The outside of barrier sheet 64 is fixed on the egative film 12A by hot-melt adhesive etc. in its lower section.Have, liner wing elastic telescopic parts are being set, for example line style rubber 66.
The end of the holding up inner face of barrier sheet 64, form flap 60A to the fixedly top of body fluid impermeability sheet 70.In lower limb enclosed, holding up the inboard compared of end with this was the free part that is not fixed in the goods main body, and this freedom part is holded up by the contractility of line style rubber 62.
In this example,, can mechanically fix by using the sticking chain of nylon as brace 130 with respect to egative film 12A.Therefore, so-called object tape can be omitted, and the fixed position of brace 130 can be freely selected.
Brace 130 can be with plastics, multi-layer nonwoven fabrics, the base portion of the connection basic material of grade made of paper is engaged on the egative film 12A by for example bonding agent, front have have contact with element 130A. have contact with element 130A by bonding agent be connected basic components and engage. have contact with element 130A and have a plurality of snap-latch pieces at its exterior side. with have contact with the front that element 130A compares and have the latter stage of the temporary fixed bonding agent 130B. of portion in the goods assembling, by the temporary fixed bonding agent 130B of portion is adhered on the barrier sheet 64, prevent the peeling off of front of brace 130. in use, resisting its bonding force peels off, bring the front of brace 130 into the predecessor sheet. front is exposed from the temporary fixed bonding agent 130B of portion the connection basic components, becomes lappet portion.
Peristome side at predecessor's sheet, inner face side at egative film 12A is being provided with as the target printed sheet 74 that designs sheet, be the target printing of having carried out making fixedly connected 130 the easy descried design in position of having contact with element 130A, carry out to see through the mode that egative film 12A can visual identification from the outside.
When wearing diaper, because be diaper to be worn on the health, like this because the contractility of line style rubber 62 plays a role, so in lower limb enclosed, by the contractility of line style rubber 62, flap 60A holded up with ship shape.
Formed at the inclosure space of urine or soft stool by the space of the portion's of holding up encirclement.If urinate in this space, then this urine is absorbed in the absorbent cores 56 by top flat 30, and simultaneously, with regard to the solid constituent of soft stool, the portion of holding up of flap 60A becomes and stops, prevents that it from crossing.The urine of transverse leakage is that barrier functionality by plane contact portion prevents its side leakage just in case crossed the holding up the amphi position lateral margin of the portion of holding up.
In the manner, form the barrier sheet 64 respectively hold up the wing and wish it is not liquid permeability but opaque liquid (semi-transparent fluidity also can) in fact.In addition, can make it to become the character of repelling liquid to barrier sheet 64 by the silicon processing etc.In any case, suitable is that barrier sheet 64 and egative film 12A have aeration respectively, and barrier sheet 64 and egative film 12A are respectively that water pressure resistance is more than or equal to 100mmH
2The sheet of O.In view of the above, embodied aeration, can prevent wearer's macule at the width sidepiece of goods.
For other point, the materials used of each one etc. for example, since identical with the situation of above-mentioned pants-type paper diaper, explanation omitted so make bold.
(mode of manufacturing equipment)
Then, the manufacturing equipment example to absorber describes.Figure 24 represents the manufacturing equipment example of absorber, supplies with the width density of hope and has carried out opening fine continuous band-shaped fiber assembly 52Z.When opening fibre, for example, as shown in figure 25, emit fibre bundle 52Y successively from the bundle 52X of fibre bundle, transport in the process at this, successively by using the compressed-air actuated fine member 120 of widening out, with the roller that circular velocity is resembled the downstream fast a plurality of fine portions that open that fine niproll 126A, 126B, 126C combine that open, and after widening out fibre, add case 140 by binding agent, pay (smog of glyceryl triacetate is filled in the case) binding agent 140b, can become the fiber assembly 52Z that the fibre bundle by desirable width density constitutes.This is opened fine line and is constituted as and makes line with the absorber of Figure 24 and directly link, and the fiber assembly 52Z that produces is directly sent into absorber make line.
Can to be fed into absorber make the fiber assembly 52Z of line pay superabsorbent polymer before coating adhesive.Therefore, in illustrated example, the upstream side of the polymer dispersed position in transporting line sets bonding agent apparatus for coating 114.As bonding agent, can use the bonding agent that constitutes by thermoplastic resin (concrete example as previously mentioned) rightly.Bonding agent except use the heavy curtain coating and roller coat cloth is continuous be coated with planarly, can also use the spiral coating, a plurality of parts that do not have bonding agent of the part encirclement of the part of coating adhesive and applied bonding agent are set.The coating weight of bonding agent is as long as determine rightly, under the common situation, more than or equal to 1g/m
2Suitable.But, because if coating too much then hinders moving of superabsorbent polymer, thus good be at 1-10g/m
2Scope in.
When coating adhesive, to use compressed-air actuated opening under the situation of upstream side that fine member 110,120 closely is arranged at bonding agent apparatus for coating 114, exist the compressed air AR that leaks out to flow into bonding agent apparatus for coating 114 along fiber assembly 52Z, or make the supply disorder of bonding agent, or make the exsiccant probability of bonding agent. therefore, preferably constitute upstream side at bonding agent apparatus for coating 114, shield 113 is set, covers bonding agent apparatus for coating 114 sides that this shield 113 of compressed air AR. preferably is arranged on fiber assembly 52Z at least.
The fiber assembly 52Z that is coated with bonding agent follows, and scatters superabsorbent polymer particle 54 by superabsorbent polymer particle diffusion member above it.This distribution for example can be undertaken by falling within conducting oneself with dignity on the fiber assembly 52Z by making the superabsorbent polymer particle simply.
At this moment, can as required the dispersion volume of superabsorbent polymer particle 54 be changed periodically.Specifically, alternatively spread state and non-spread state repeatedly alternatively are provided with the part of having paid superabsorbent polymer particle 54 and the part of not paying (paying superabsorbent polymer particle 54 off and on along carriage direction) is a good mode along carriage direction.In this case, as shown in figure 26, on the cutting position C that will cut in the back, it is good especially not scatter superabsorbent polymer particle 54 substantially.Specifically, special good be that sky is opened than the shorter appropriate length L 1 of a length of absorber, for example, open the interval of 10-30cm along the carriage direction sky, determine cutting position C, become in the length L 2 that contains enough cutting surpluses as the center, for example spread all over width integral body, do not have state (the not enough weight per unit area 0.01g/cm of superabsorbent polymer particle 54 in fact with the 5-20mm degree
2), cut.Like this, by make superabsorbent polymer particle 54 pay operation and cutting action also can be understood from embodiment described later synchronously, compare with the situation of cutting, can prolong the life-span of cutter blade significantly in part with superabsorbent polymer particle 54.
Can utilize the cyclically-varying of the dispersion volume of superabsorbent polymer particle 54, the many parts of dispersion volume and few part are set.In addition, can also increase and decrease dispersion volume continuously, in this case, for example, can adopt at cutting position and not scatter superabsorbent polymer particle 54, and, along with the mode that dispersion volume is increased.
Then, the fiber assembly 52Z that has scattered superabsorbent polymer particle 54 can only be rotated by the rotation roller, is transported to the operation of back, and still, attracting in rotation by vacuum furnace 106 also is good mode.This vacuum furnace 106 is constituted as at periphery wall has suction hole, spreads all over its all direction dictates scope (in the illustrated example roughly the scope of left-half), attracts from the inboard by the not shown suction pump that goes out.The fiber assembly that is scattered with superabsorbent polymer particle 54 is directed when contacting with outer peripheral face by vacuum furnace 106.Then, in this process, attract by suction hole from vacuum furnace 106, environmental gas is paid side by in the fiber assembly 52Z from superabsorbent polymer particle 54, by opposition side (vacuum furnace 106 sides), by the power of passing through of this gas, superabsorbent polymer particle 54 moves in fiber assembly 52Z.
Particularly in good mode, after spreading to superabsorbent polymer particle 54 on the fiber assembly 52Z, further cover the sheet of covering piece 58 grades thereon.In this case, in vacuum furnace 106, the opposite sides of the face that is coating sheet 58 from fiber assembly attracts.Like this, if sheet 58 is coated when attracting, then do not compare with there being coating and so on situation, stronger attraction force acts can make superabsorbent polymer particle 54 disperse to inner the moving of fiber assembly 52Z in superabsorbent polymer particle 54 respond wellly.As this sheet, can use the liquid permeability sheet of crimped paper, non-woven fabrics, apertured topsheet etc., the liquid impermeability sheet of polyethylene made membrane etc.In illustrated example, this sheet only is a covering piece 58, under the situation that above-mentioned retention tab 80 is set, though not shownly go out, also retention tab can be supplied with covering piece 58, under these sheets and the eclipsed state of fiber assembly 52Z, attracts.
For superabsorbent polymer particle 54 is fixed on the fiber assembly 52Z, on the fiber assembly 52Z before paying superabsorbent polymer the coating adhesive, though not shownly go out, can also be after having paid superabsorbent polymer particle 54, and make coating adhesive on the fiber assembly 52Z before superabsorbent polymer particle 54 moves in fiber assembly 52Z, promptly, from illustrated example, superabsorbent polymer particle 54 by scatter the back before enter vacuum furnace 106 during, bonding agent can be applied on the fiber assembly 52Z.
In addition, after spreading to superabsorbent polymer particle 54 on the fiber assembly 52Z, further cover thereon under the situation of sheet of retention tab 80 or covering piece 58 etc., can on sheet feed path, bonding agent apparatus for coating 115 be set, supply with bonding agent to the face that becomes fiber assembly 52Z side of sheet 58 in advance with respect to vacuum furnace 106.If this mode of employing, the superabsorbent polymer particle 54 that then is exposed to fiber assembly 52Z surface is fixed on the sheet 58 by bonding agent, and not bonding superabsorbent polymer particle 54 is inner mobile to fiber assembly 52Z by the attraction of back.But, because exist bonding agent, in the side apparatus of downstream, produce the probability of adhering to the fault that is cause, so should not inadequate coating adhesive at sheet 58 with bonding agent attached to causing hole obstruction etc. on the vacuum furnace 106.
Have again, also can be at the apparatus for coating 116 that side (opposing face of sheet 58 sides, among the figure for top) is provided with bonding agent that exposes of the fiber assembly 52Z in the downstream of vacuum furnace 106, after attracting, that is, the fiber assembly 52Z after superabsorbent polymer particle 54 is moved supplies with bonding agent.If adopt this mode, then the polymer in fiber assembly 52Z in the superabsorbent polymer particle of being paid 54 can be paid the superabsorbent polymer particle 54 that the opposition side of side moves and be fixed on the fiber assembly 52Z.In addition, when the side of exposing at fiber assembly 52Z, emulsion sheet or as above-mentioned separately, make two flanks of covering piece 58 turn back when coating around the two ends of fiber assembly 52Z, can be with the superabsorbent polymer particle 54 that moves the side to exposing of fiber assembly 52Z, with respect to the fixing superabsorbent polymer particle 54 of this sheet 58.
The supply of these bonding agents can be suitable for any one or plural combination.As bonding agent, can use the bonding agent that constitutes by thermoplastic resin (concrete example as mentioned above) rightly.
Like this, for example covered sheet or such as shown separately so paid the fiber assembly 52Z of superabsorbent polymer 54, by セ one ラ one, with two flanks of sheet 58 around the two ends of fiber assembly 10 turn back coat after, length cutting according to the rules becomes independent absorber 50.
On the other hand, amount with respect to the superabsorbent polymer of fiber assembly 52Z distributes, the Density Distribution of superabsorbent polymer, fibre density distribute, be under the situation of purpose with general, evenly for well, to bring into play under the situation that special absorption characteristic is a purpose, good is according to its purpose, and few part of correspondingly many parts or the high low part of part are set.
Specifically, when scattering polymer, can be arranged on the relatively many parts of in-plane dispersion volume and few part.Particularly in absorbent commodity, most applications requires the absorbtivity of the width central part of increase absorber, in this case, when scattering polymer, the mode that can Duo than the amount of the superabsorbent polymer of width two flanks of fiber assembly 52Z with the amount of the superabsorbent polymer in the width pars intermedia of fiber assembly 52Z is scattered superabsorbent polymer.
In addition, when scattering polymer, the mode that can Duo than the amount of the superabsorbent polymer before and after the length direction of fiber assembly 52Z with the amount of the superabsorbent polymer in the length direction pars intermedia (becoming the length direction pars intermedia of the part of each absorber) of fiber assembly 52Z, the distribution superabsorbent polymer.Such distribution can be by above-mentioned superabsorbent polymer particle 54 cycle of dispersion volume change and realize.
In addition, by high part of captivation in the vacuum furnace 106 and low part are set, because in the high position of captivation, the superabsorbent polymer of more amount is offside in vacuum furnace 106 sides, so relatively high part of the density of the superabsorbent polymer in the fiber assembly and low part can be set. for example, by making attraction force acts in the vacuum furnace 106 in the width central part of fiber assembly 52Z, than width two flanks that act on fiber assembly 52Z strong (maybe can make pull up time length), can be as above-mentioned all directions formula, make the density height of the density of the superabsorbent polymer in the width central part of fiber assembly 52Z than width two flanks. in such structure, because the infiltration rate of the width central part of fiber assembly 52Z is low, the infiltration rate height of width two flanks, so be used under the situation of absorbent commodity, liquid all spreads to absorber easily, that is, improved diffusibility.
Have, the fiber assembly 52Z that is made of fibre bundle flows along the continuous direction of fiber easily because of liquid, so by relatively high part of fibre density and low part are set, can pay special absorption characteristic again.Such situation can be by partly opening fibre strongly when making fiber assembly 52Z, perhaps partly tie up to use a plurality of fibre bundles to wait to realize.As concrete example, as the 9th above-mentioned mode, making the fibre density of the width pars intermedia of the fiber assembly 52Z that is made of fibre bundle is greatly good mode than the fibre density of width two flanks.The fiber assembly 52Z that is made of fibre bundle is because liquid flows along the continuous direction of fiber easily, so at the width pars intermedia of fiber assembly 52Z, more liquid flows along the continuous direction of fiber.
In addition, also can not utilize the moving of the superabsorbent polymer particle 54 that passes through power of gas.Such mode can be paid superabsorbent polymer particle 54 to fiber assembly by the downstream at vacuum furnace 106 as shown in figure 24, or the attraction of omission vacuum furnace 106 realizes.
In addition, also pay superabsorbent polymer particle 54, simultaneously, also pay superabsorbent polymer particle 54 to fiber assembly 52Z in the downstream of vacuum furnace 106 at the upstream side of vacuum furnace 106.In this case, can also spread all over all of the part that becomes an absorber, upstream side and downstream both sides at vacuum furnace 106 pay superabsorbent polymer particle 54, in addition, also can be at the part of the part that becomes an absorber, pay superabsorbent polymer particle 54 at the upstream side of vacuum furnace 106,, pay superabsorbent polymer particle 54 in the downstream of vacuum furnace 106 at another part.
Have again, downstream at vacuum furnace 106, the situation of paying superabsorbent polymer particle 54 to fiber assembly 52Z is inferior, as required, in the downstream of vacuum furnace 106, particularly pay under the situation of superabsorbent polymer particle 54 in the downstream of vacuum furnace 106, pay in the later roughly all or part of transporting line in position at this, attract from the below by sheet 58 and fiber assembly 52Z, it is mobile to promote that polymer waits in fiber assembly 10.
Embodiment
(experiment 1)
Use and do not contain superabsorbent polymer (weight per unit area is 0.000g/cm
2) fiber assembly and superabsorbent polymer be 0.020g/cm
2Fiber assembly, cut repeatedly, damage until cutter blade.Its result is, distinguished by cutting in the position of not containing or do not contain substantially superabsorbent polymer fully, can be with the life-span maximum extension about 30% of cutter blade.
(experiment 2)
Use the pants-type paper diaper (embodiment and comparative example) of the fibre bundle of cellulose diacetate fiber being opened the absorber that fine fiber assembly produces at having, used the general absorber of pulp short fiber and goods (example in the past) to carry out following mensuration.The result is illustrated in table 5 and the table 6.
The weight per unit area of superabsorbent polymer particle (SAP) as shown in figure 27, the area of overlooking of the absorber of object is divided into 3 parts equably at width, be divided into 3 parts of totals equably at length direction and be divided into 9 zones, with respect to the weight of the superabsorbent polymer particle of each regional area for dividing a bulk density.
In addition, the test method in this table is as follows.
(mensuration of the water absorption of superabsorbent polymer particle)
Sodium-chloride water solution with 0.9% (the superfine sodium chloride 9.00g of reagent being dissolved in the ion exchange water modulation of 991.0g) 500.00 ± 0.10g puts into 1 liter of beaker that rotor is housed, one side stirs liquid by the electromagnetic type agitator, one side adds sample 2.0000 ± 0.0002g, cover with the saran cover plate, stirred 1 hour.
Use standard filter screen (38 μ m, 200mm Φ x45mm) filters the beaker content, with polyfluortetraethylene plate gel residual on the filter screen is dewatered, and places 15 minutes.Measure the weight A of gel residual on the filter screen, calculate water absorption by following formula.
C＝A/S…(1)
Here, C: naturalness water absorption (g/g), A: the weight of residual gel (g), S on the filter screen: example weight (g).
(mensuration that adds the absorbtivity of depressing of superabsorbent polymer particle)
As shown in figure 28, make the through hole up and down of center and brace table 201 central authorities involutory, setting is provided with acrylic resin rounding tube 203 (internal diameter 2cm, high 5cm, the nylon wire 201N of 75 μ m is installed in the bottom surface), the sample 200 of 0.100 ± 0.0002g is put into this cylinder 203, on sample 200, place columned hammer 202 (diameter 1.9cm, weight 120g).
By conduit 206, the outlet of buret 204 is connected with the open lower side of the through hole of brace table 201, read scale value and the scale value after 30 minutes opened before valve V1, the V2.
Calculate by following formula and to add the absorbtivity of depressing.
C＝(A-B)/S…(3)
Here, C: add the absorbtivity (ml/g), the A that depress: scale value (ml), B that the suction beginning is back 30 minutes: scale value (ml), S before the suction: example weight (g).
(mensuration of the gel strength of superabsorbent polymer particle)
Carbamide 20.0g, sodium chloride 8.0g, calcium chloride 0.3g, magnesium sulfate 0.8g, ion exchange water 970.9g, ferrous sulfate 0.25g are mixed, and modulation integral body is 1 liter artificial urine (iron ion 50ppm).
Artificial urine 49 ± the 0.1g that will contain iron ion 50ppm joins in 100 milliliters the beaker that rotor is housed, and uses the electromagnetic type agitator to stir.Weigh reagent 1.0000 ± 0.0002g, put in the vortex in the beaker, stir, until dissipation of vorticity, liquid level becomes level.
The gel that generates was placed in the constant temperature and humidity machine of 40 ℃ * 60%RH three hours.
In being immersed in 25 ℃ thermostatic water bath, after 5 minutes, use gelometer to measure gel strength.By following formula, this measured value is carried out unit conversion, calculate gel strength (Pa).
C＝A×0.1…(4)
Here, C: gel strength (Pa), A: the gel strength (dyne/cm that obtains from gelometer
2), 0.1: coefficient.
(mensuration of the capacity of returns of diaper state)
Top flat is placed on the absorber that is cut into 100mm * 300mm, seals four limits, become sample.
Sample central authorities are placed on the cylinder utensil that internal diameter is 27mm (on the support portion 150mm * 150mm).The cylinder utensil increases the weight of as required.
3 artificial urine of dripping in 10 minutes interval of amount with 50cc.
Behind 10 minutes of dripping for the third time, put filter paper (ADVANTEC NO.2,10cm * 10cm, 30 overlapping), behind the load in 10 seconds of weight that apply 5kg, measure the weight of medicated napkin, deduct the weight of the medicated napkin of measuring in advance that absorbs, calculate the artificial urine amount that moves to medicated napkin, as capacity of returns (g).
(mensuration of the infiltration rate under the diaper state)
Use U word utensil, this U word utensil by imagination from the crotch to the buttocks part and the U word shape plate that forms constitutes, be formed with inlet in the width central authorities of upper/lower positions.
The length direction middle position of the absorber in the sample diaper is done labelling, and this mark position and inlet is involutory, sample is fixed on the outside of U word utensil.
The U word utensil of fixing sample is positioned over hammock, does not tilt.
The hammer (1kg, the 10cm * 10cm) be positioned on the U word utensil that central authorities are had through hole.At this moment, the through hole of hammer and the inlet of U word utensil are coincide.
By the through hole of hammer and the inlet of U word utensil, 100cc injects sample with artificial urine (above-mentioned artificial urine), measures the needed time that all absorbs, as infiltration rate (second).
(sensory evaluation of nerve)
Use each absorber,, make the diaper sample according to the shared mode of remaining part except that absorber.Preparation is at the sample that does not have compression after the manufacturing with after with common mode compression packing, and the sample of unpacking utilizes visual and hands touches and estimates nerve by 20 persons of being verified.Its result is, with example in the past be benchmark and with its contrast, the nerve height is arranged, (evaluation as zero in table is represented to be rich in the evaluation of flexibility.)。
(evaluations of absorbent properties)
Prepare the anthropometric dummy (men's and lady's) that the L size is used, lie on the back and prostrate each state under, in the speed of dividing, inject under the situation of artificial urine of 100cc with injection rate 12.5cc/, by by the end of leak produce stand up number of times evaluation.
Covering piece: all be crimped paper 20gsm
Retention tab has and intermediate has: the use hot-wind nonwoven cloth (eccentric 50% durable hydrophilic of the long 44mm of 30gsm PE/PET 2.2dtex fiber,
The eccentric hollow 50% durable hydrophilic Off Network ロ Application corporate system of the long 51mm of PE/PET 2.8dtex fiber) (deflection B 0.300gfcm
2/ cm)
The retention tab of embodiment 7: use hot-wind nonwoven cloth (the long 51mm of 50gsm PE/PP 5.6dtex crinkled fibre block water Off Network ロ Application corporate system) (deflection B 0.850gfcm
2/ cm)
The retention tab of embodiment 8: use SMMS 13gsm PP100% system (the deflection B 0.03gfcm of Technical Sourcing Internation
2/ cm)
Anthropometric dummy test: use the L size
" deflection is big " expression deflection is excessively big, and " deflection is little " expression deflection is excessively little.
The possibility of utilizing on the industry
The present invention is suitable for the manufacturing of the absorber in the absorbent commodity of the absorbing sheet that paper nappy, sanitary napkin, incontinence together use with sheet, with cover of diaper etc.
Claims (10)
1. absorber manufacturing equipment, described absorber contains absorbent cores, and described absorbent cores has opens fibre and the fiber assembly and the superabsorbent polymer particle that form to fibre bundle, it is characterized in that,
The member that described absorber manufacturing equipment has superabsorbent polymer particle additional member, the particle migration member of superabsorbent polymer and supplies with bonding agent,
The outside of the fiber assembly that this superabsorbent polymer particle additional member forms to fibre bundle is opened fibre adds the superabsorbent polymer particle;
The particle migration member of this superabsorbent polymer makes gas by having added the fiber assembly of superabsorbent polymer particle, by the power of passing through of gas, above-mentioned superabsorbent polymer particle is moved in above-mentioned fiber assembly;
The member of this supply bonding agent to the fiber assembly before the additional above-mentioned superabsorbent polymer particle, after additional above-mentioned superabsorbent polymer particle and make the superabsorbent polymer particle before in fiber assembly, moving fiber assembly or make the particle migration fiber assembly supply bonding agent after in fiber assembly of above-mentioned superabsorbent polymer.
2. absorber manufacturing equipment as claimed in claim 1 is characterized in that,
Have the covering member on the sheet face of superabsorbent polymer particle that covered adding of fiber assembly,
The particle migration member of above-mentioned superabsorbent polymer from the covering of above-mentioned fiber assembly the opposite sides of face of sheet attract.
3. absorber manufacturing equipment as claimed in claim 2 is characterized in that, has before covering above-mentioned, supplies with the member of bonding agent to the face on the above-mentioned fiber collection of above-mentioned become side.
4. as each described absorber manufacturing equipment in the claim 1 to 3, it is characterized in that having out fine member and shading member, this opens fine member by compressed air, and fibre bundle is opened fibre, forms fiber assembly; This shading member covers from this opens the air that fine member blows to above-mentioned bonding agent supply member.
5. as each described absorber manufacturing equipment in the claim 1 to 3, it is characterized in that,
The particle migration member of above-mentioned superabsorbent polymer makes the second portion effect that power compares above-mentioned fiber assembly to the first of above-mentioned fiber assembly passed through of above-mentioned gas, and to get intensity strong or the time is long; Above-mentioned first is the width pars intermedia of above-mentioned fiber assembly, and above-mentioned second portion is width two flanks of above-mentioned fiber assembly.
6. as each described absorber manufacturing equipment in the claim 1 to 3, it is characterized in that, above-mentioned superabsorbent polymer particle additional member is so that the amount of the superabsorbent polymer particle of the first of above-mentioned fiber assembly more than the mode of the amount of the superabsorbent polymer particle of the second portion of above-mentioned fiber assembly, is added the superabsorbent polymer particle; Above-mentioned first is the width pars intermedia of above-mentioned fiber assembly, and above-mentioned second portion is width two flanks of above-mentioned fiber assembly.
7. as each described absorber manufacturing equipment in the claim 1 to 3, it is characterized in that, above-mentioned superabsorbent polymer particle additional member is so that the amount of the superabsorbent polymer particle of the first of above-mentioned fiber assembly more than the mode of the amount of the superabsorbent polymer particle of the second portion of above-mentioned fiber assembly, is added the superabsorbent polymer particle; Above-mentioned first is the length direction pars intermedia of above-mentioned fiber assembly, and above-mentioned second portion is the front part and the rear section of the length direction pars intermedia of above-mentioned fiber assembly.
8. as each described absorber manufacturing equipment in the claim 1 to 3, it is characterized in that having the fibre density of the first that the makes above-mentioned fiber assembly member higher than the fibre density of the second portion of above-mentioned fiber assembly; Above-mentioned first is the width pars intermedia of above-mentioned fiber assembly, and above-mentioned second portion is width two flanks of above-mentioned fiber assembly.
9. as each described absorber manufacturing equipment in the claim 1 to 3, it is characterized in that, have transport to fibre bundle open fibre and the fiber assembly that forms transport line, above-mentioned superabsorbent polymer particle additional member is at the above-mentioned fiber assembly that transports on the line, make the additional amount cyclically-varying of superabsorbent polymer particle, and additional superabsorbent polymer particle.
10. absorber manufacturing equipment as claimed in claim 9, it is characterized in that, above-mentioned superabsorbent polymer particle additional member is along the additional off and on above-mentioned superabsorbent polymer particle of carriage direction, along carriage direction part of having added the superabsorbent polymer particle and the part of not adding the superabsorbent polymer particle are set alternatively, and have the cutter arrangement that is cut into discrete absorber in the part of not adding the superabsorbent polymer particle.
Applications Claiming Priority (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP190409/2004 | 2004-06-28 | ||
| JP2004190409A JP4477430B2 (en) | 2004-06-28 | 2004-06-28 | Absorber manufacturing equipment and absorber manufacturing method |
| JP2004340950A JP4549168B2 (en) | 2004-11-25 | 2004-11-25 | Production facility for absorbents of body fluid absorbent articles |
| JP340950/2004 | 2004-11-25 | ||
| JP344715/2004 | 2004-11-29 | ||
| JP2004344715A JP4553700B2 (en) | 2004-11-29 | 2004-11-29 | Absorbent article and manufacturing method of absorbent body |
| JP2005031662A JP4790281B2 (en) | 2005-02-08 | 2005-02-08 | Absorbent articles |
| JP031662/2005 | 2005-02-08 | ||
| JP103856/2005 | 2005-03-31 | ||
| JP2005103856A JP4790296B2 (en) | 2005-03-31 | 2005-03-31 | Absorbent articles |
| PCT/JP2005/011861 WO2006001456A1 (en) | 2004-06-28 | 2005-06-28 | Apparatus for producing absorbing material, absorbing material and absorbent article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1976663A CN1976663A (en) | 2007-06-06 |
| CN1976663B true CN1976663B (en) | 2010-05-12 |
Family
ID=35774610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800217101A Expired - Fee Related CN1976663B (en) | 2004-06-28 | 2005-06-28 | Apparatus for producing absorbing material |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4477430B2 (en) |
| CN (1) | CN1976663B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD777332S1 (en) | 2013-10-29 | 2017-01-24 | Beijing Beishute Maternity & Child Articles Co., Ltd. | Absorbent pad |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4557905B2 (en) * | 2006-02-15 | 2010-10-06 | 花王株式会社 | Disposable diapers |
| KR101400703B1 (en) | 2006-03-23 | 2014-05-29 | 가오 가부시키가이샤 | Absorbent article and process for production thereof |
| JP4863848B2 (en) * | 2006-11-17 | 2012-01-25 | 花王株式会社 | Absorbent body of absorbent article and method for producing the same |
| JP2007267763A (en) * | 2006-03-30 | 2007-10-18 | Kao Corp | Absorbent article and manufacturing method thereof |
| JP4474480B2 (en) * | 2006-05-31 | 2010-06-02 | 大王製紙株式会社 | Absorbent article and method of manufacturing absorbent element |
| JP4919774B2 (en) * | 2006-11-17 | 2012-04-18 | 花王株式会社 | Absorber |
| JP5306773B2 (en) | 2008-10-29 | 2013-10-02 | ユニ・チャーム株式会社 | Liquid absorbing structure for worn articles |
| ES2605420T3 (en) | 2008-12-29 | 2017-03-14 | Sumitomo Seika Chemicals Co., Ltd. | Water absorbing laminar composition |
| JP5615523B2 (en) | 2009-09-25 | 2014-10-29 | 株式会社リブドゥコーポレーション | Sheet member and method for manufacturing sheet member |
| WO2014026346A1 (en) * | 2012-08-16 | 2014-02-20 | 北京倍舒特妇幼用品有限公司 | Method of machining absorbent body of sanitary product nursing pad and device therefor |
| CN103961218B (en) * | 2014-05-15 | 2016-04-27 | 泉州市汉威机械制造有限公司 | A kind of manufacture method of disposable absorbent |
| JP6170977B2 (en) * | 2015-10-07 | 2017-07-26 | 花王株式会社 | Absorbent articles |
| JP6360540B2 (en) | 2016-11-29 | 2018-07-18 | 大王製紙株式会社 | Absorbent articles |
| JP7121480B2 (en) * | 2017-11-14 | 2022-08-18 | 株式会社ダイセル | ABSORBENT ARTICLE MANUFACTURING METHOD, ABSORBENT ARTICLE MANUFACTURER, ABSORBENT ARTICLE, AND ABSORBENT |
| JP7351657B2 (en) * | 2019-06-28 | 2023-09-27 | 花王株式会社 | absorbent articles |
| JP7402147B2 (en) * | 2019-12-23 | 2023-12-20 | 花王株式会社 | Absorbent body and its manufacturing method |
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|---|---|---|---|---|
| CN1069890A (en) * | 1991-07-23 | 1993-03-17 | 伊斯曼柯达公司 | Fiber that can spontaneously transporting fluids |
| US6068620A (en) * | 1998-03-30 | 2000-05-30 | Paragon Trade Brands | Absorbent laminate |
| JP2003192732A (en) * | 2001-08-09 | 2003-07-09 | San-Dia Polymer Ltd | Water absorbent resin and absorbent article formed thereof |
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- 2004-06-28 JP JP2004190409A patent/JP4477430B2/en not_active Expired - Lifetime
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069890A (en) * | 1991-07-23 | 1993-03-17 | 伊斯曼柯达公司 | Fiber that can spontaneously transporting fluids |
| US6068620A (en) * | 1998-03-30 | 2000-05-30 | Paragon Trade Brands | Absorbent laminate |
| JP2003192732A (en) * | 2001-08-09 | 2003-07-09 | San-Dia Polymer Ltd | Water absorbent resin and absorbent article formed thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD777332S1 (en) | 2013-10-29 | 2017-01-24 | Beijing Beishute Maternity & Child Articles Co., Ltd. | Absorbent pad |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006006741A (en) | 2006-01-12 |
| CN1976663A (en) | 2007-06-06 |
| JP4477430B2 (en) | 2010-06-09 |
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