CN1163100A - Absorptive articles - Google Patents
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- CN1163100A CN1163100A CN 97103775 CN97103775A CN1163100A CN 1163100 A CN1163100 A CN 1163100A CN 97103775 CN97103775 CN 97103775 CN 97103775 A CN97103775 A CN 97103775A CN 1163100 A CN1163100 A CN 1163100A
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Abstract
The invention discloses an article of absorbability which is provided with liquid-permeable surface layer material, liquid-non-permeable bottom layer material and a liquid storage absorber embedded between the two layer materials, wherein, the absorber meets the following requirement (1) and the super-absorbing polymer containing in the absorber meets the following requirements (2) and (3), namely, (1): the absorber mainly includes fiber base material and super-absorbing polymer, with the ratio of the super-absorbing polymer no less than 45% of the total weight of the absorber; (2): according to the centrifugal dewatering method, the absorbability of the super-absorbing polymer saline is no less than 25g/g; (3): the passing time of the super-absorbing polymer is no more than 20 seconds.
Description
The present invention relates to absorbent commodity, more particularly, it is absorbent commodity as disposable diaper and sanitary towel, this absorbent commodity comprises liquid permeability top layer material, non-liquid permeability backsheet, and be embedded in liquid-keeping absorber between top layer material and the backsheet, and this absorbent commodity still has the high-absorbable energy when absorber is extremely thin, and have suitable sense of good subsides and excellent leakageresistance.
Absorbent commodity, as disposable diaper, sanitary towel and urinary incontinence pad, mainly be included in the absorber that its core place is provided with, this absorber plays the effect that absorbs and store up the body fluid such as urine or the blood that stay body discharges, absorbent commodity also comprises and is arranged on the softish liquid permeability top layer material on the side that contacts with skin and is arranged on non-liquid permeability backsheet on the absorber opposite side.
Conventional absorber is made by hydrophilic fibre base material and super-absorbent polymer as wood pulp.Body fluid flow is crossed the top layer material of being made by non-woven fabrics etc., is absorbed bulk absorption then.The body fluid that absorbs temporarily rests in fiber base material such as the wood pulp, oozes then and moves and store up and stay in the super-absorbent polymer.In the absorbent commodity of routine, with total restatement of absorber, the usage ratio of super-absorbent polymer is about 10-30%.
Normally the amount that increases super-absorbent polymer by the amount that reduces the fiber base material reduces the thickness of this absorbent commodity.In this case, because the ratio of super-absorbent polymer increases in the absorber, and body fluid makes super-absorbent polymer particles swelling and deliquescing, these granules will be in contact with one another, or polymer beads rearranges and close mutually, and this causes the space between the swelling granule to diminish.Consequently, the effect of body fluid passage should be played in this space, and is blocked, and also formed one deck body fluid on blocking portion, so-called gel blockage phenomenon that Here it is.In case the gel blockage phenomenon takes place, even the body fluid volume that absorbs does not also reach capacity, absorbent commodity is absorb body fluids again.
On the other hand, integrally formed top layer material and absorber also are known by the top layer material to the liquid permeability of absorber to increase liquid.In the case, top layer material and absorber can separate, and hinder absorbability.If use a large amount of hotmelts to prevent separating of top layer material and absorber, hot melt adhesive then can cause blocking, and also can hinder absorbability.
Japanese Patent Application Publication 49964/92 has proposed to mix the conjugate fiber with different melting points in absorber, so that come integrally formed absorber and top layer material by hot adhesion.Yet, according to its disclosed content, because the mixed ratio of conjugate fiber is higher, the absorber slightly hydrophobicity that becomes.Consequently, not only absorbability descends, and some super-absorbent polymers that use together also cause absorbability to descend because bonding is blocked.Moreover because the type heartwood material of conjugate fiber is the resin with high resiliency modulus, absorber will thickening, makes to be difficult to reduce general thickness.
Therefore, the purpose of this invention is to provide a kind of slim absorbent commodity, the absorber of this absorbent commodity has a high proportion of super-absorbent polymer, but still has excellent absorbent properties again, and does not hinder absorbability, and for example bonding is blocked.
Found that of present inventor's broad research, by in absorber, using a certain proportion of super-absorbent polymer, and this super-absorbent polymer has specific absorbent properties and specific liquid passes through the time, just can obtain meeting the absorbent commodity (first finds) of above-mentioned purpose.
The present inventor also finds, above-mentioned purpose can realize by a kind of absorbent commodity, this absorbent commodity has the absorber that is made of first absorbed layer and second absorbed layer, this first absorbed layer comprises specific super-absorbent polymer, this second absorbed layer also comprises specific super-absorbent polymer, and the set-up mode of first and second absorbed layers is to make separately super-absorbent polymer mix mutually (second finds).
The present invention just is based on first and finds to finish, and by providing a kind of absorbent commodity to realize its purpose, this absorbent commodity has liquid permeability top layer material, non-liquid permeability backsheet and is embedded in liquid-keeping absorber between them, wherein, described absorber meets the following conditions (1), is included in super-absorbent polymer in the absorber meet the following conditions (2) and (3) (being " a first aspect of the present invention " to call this in the following text):
(1) described absorber mainly comprises fiber base material and super-absorbent polymer, and with total restatement of described absorber, the ratio of described super-absorbent polymer is for being no less than 45 weight %.
(2) according to the centrifuge dehydration method, the normal saline absorbability of described super-absorbent polymer is for being no less than 25g/g.
(3) liquid of described super-absorbent polymer is no more than 20 seconds by the time, and this measures according to following method: with the described super-absorbent polymer of 0.5g put into be equipped with normal saline, cross-sectional area is 4.91cm
2In the cylinder of (internal diameter is 25mm φ), so that make described super-absorbent polymer swelling until saturated with normal saline, then after the super-absorbent polymer of swelling sinks, measure the 50ml normal saline by required time of described super-absorbent polymer (later used term " liquid passes through the time " refer to obtain with this understanding measured value).
The present invention also is based on second and finds to reach, and by providing a kind of absorbent commodity to realize its purpose, this absorbent commodity has liquid permeability top layer material, non-liquid permeability backsheet and is embedded in liquid-keeping absorber between them, wherein, described absorber has first absorbed layer and second absorbed layer, first absorbed layer comprises the super-absorbent polymer (A) that satisfies above-mentioned condition (3), and second absorbed layer comprises the super-absorbent polymer (B) of meet the following conditions (4); Described super-absorbent polymer (A) and described super-absorbent polymer (B) exist in the mode that does not mix basically; And described first absorbed layer is arranged near described top layer material one side, and described second absorbed layer is arranged near described backsheet one side (following claim that sometimes this is a second aspect of the present invention).
(4) the normal saline absorbance of described super-absorbent polymer (B) is no less than 5g/30sec/0.3g, and this value is held wettability (DW) (demand wettabilitty) method according to need and recorded.
Absorbent commodity according to the present invention has a high proportion of super absorbing polymer in absorber, thing but still have excellent absorbent properties again, and do not hinder absorbability, example gel blocks, and thickness has reduced.
Even absorbent commodity according to the present invention when once excreting a large amount of liquid, also has excellent quick liquid-absorbent.
Is slim according to absorbent commodity of the present invention owing to its absorber, so feel as snug as a bug in a rug when dressing.
Can reduce because the leak of liquid that the torsional deformation of absorber causes according to absorbent commodity of the present invention, and because can stably keep its shape according to the absorber of absorbent commodity of the present invention, so this absorbent commodity has good surface appearance when dressing.Brief Description Of Drawings:
Fig. 1 is the axonometric chart as the disposable diaper of first embodiment of the absorbent commodity of first aspect present invention.
Fig. 2 is the plane graph of disposable diaper when flattening shown in Figure 1, and its part has been clipped.
Fig. 3 be the major part of disposable diaper along the schematic cross-sectional on its width, this disposable diaper is as second embodiment of the absorbent commodity of first aspect present invention.
Fig. 4 be the major part of disposable diaper along the schematic cross-sectional on its width, this disposable diaper is as the 3rd embodiment (corresponding to Fig. 3) of the absorbent commodity of first aspect present invention.
Fig. 5 be the major part of disposable diaper along the schematic cross-sectional on its width, this disposable diaper is as the 4th embodiment (corresponding to Fig. 4) of the absorbent commodity of first aspect present invention.
Fig. 6 is the amplification cross-sectional view that schematically shows the structure of the absorber that is used for second aspect present invention.
Fig. 7 is the amplification cross-sectional view (corresponding to Fig. 6) that schematically shows the another kind of structure of the absorber that is used for second aspect present invention.
Fig. 8 is the amplification cross-sectional view (corresponding to Fig. 6) that schematically shows another structure of the absorber that is used for second aspect present invention.
Fig. 9 is the amplification cross-sectional view (corresponding to Fig. 6) that schematically shows the another kind of structure again of the absorber that is used for second aspect present invention.
Shown in Figure 10 is to be used to measure the device of the liquid of super-absorbent polymer by the time.
Shown in Figure 11 is to hold the device that wettability (DW) method is measured the normal saline absorbance according to need.
Below with reference to the preferred embodiment of accompanying drawing, be described as disposable diaper to the absorbent commodity of first aspect according to the present invention.Fig. 1 is the axonometric chart as the disposable diaper of first embodiment of the absorbent commodity of first aspect present invention.Fig. 2 is the plane graph of disposable diaper when flattening shown in Figure 1, and its part has been clipped.
The disposable diaper of embodiment as illustrated in fig. 1 and 2 comprises liquid permeability top layer material 2, non-liquid permeability backsheet 3 and be embedded in top layer material 2 and backsheet 3 between liquid-keeping absorber 4.It has front waist portion 5 and back waist portion 5 ', and when dressing this diaper, they are equivalent to the health front part and the health rear section of wearer respectively.
The limit of waist portions 5 ' is provided with a pair of tightening up and is with 10 and 10 ' after the disposable diaper 1, when dressing diaper, front waist portion 5 and back waist portion 5 ' can be fixed tightly in together by them.On the surface of the backsheet 3 of front waist portion 5, be provided with so-called fixing band 11, tighten up be with 10 and 10 ' and this fixing band stick together mutually.
In disposable diaper 1, top layer material 2 is liquid permeability sheet materials, and the Excreta of health can be by it by entering in the absorber 4, and it is preferably made by the material with underwear sense.This type of liquid permeability sheet material preferably includes textile fabric, non-woven fabrics and porous membrane.The preferred top layer material 2 that uses is peripheral as repellency, can prevent that like this urine etc. from oozing out the leakage that causes by periphery.The processing that makes this sheet material have repellency can be carried out by the following method: with the peripheral part of hydrophobic compound such as silicone oil and paraffin oil coating top layer material 2, or apply the whole surface of top layer material 2 with hydrophilic compounds such as alkyl phosphate, use the warm water washing peripheral part then.
Form elastomer 6 of waist gauffer 7 and 7 ' and the elastomer 8 of formation leg creases 9 and 9 ' and be preferably rubber covered wire, rubber braid over braid, elastic film or polyurethane foam thin film.
The fiber base material package is drawn together cellulose fibre, modified cellulose fibre, the mixture of synthetic fibers and two or more above-mentioned fibers.
Cellulose fibre comprises natural fiber, as wood pulp and Cotton Gossypii and cellulose chemistry fiber, as viscosity artificial silk and typel.
Synthetic fibers comprise polyethylene fibre, polypropylene fibre, polyester fiber, Fypro, polyacrylonitrile fibre, vinal, core/sheath type the conjugate fiber that contains at least two kinds of these synthetic fibers, and the composite fibre of making by at least two kinds of these synthetic fibers.
The fiber base material is preferably various hydrophilic fibre cellulose fibers.When using the fiber base material of possess hydrophilic property not, material usable surface activating agent etc. carries out surface treatment, makes its possess hydrophilic property.
In absorber 4, with total restatement of absorber 4, the usage ratio of super-absorbent polymer is 45 weight % or higher.Just aforesaid, if consider problem as gel blockage, with total restatement of absorber, it is about 10-30 weight % that conventional disposable diaper only allows the content of super-absorbent polymer.In the present invention, even when the content of super-absorbent polymer is no less than 45 weight %, also the gel blockage phenomenon can not take place, this just makes absorbent commodity of the present invention when having excellent absorbent properties again, and thickness is also reduced.With total restatement of absorber, the use amount of super-absorbent polymer is preferably 45-90 weight %, particularly 50-80 weight %.
Because following reason, with total restatement of absorber, the use amount of fiber base material is preferably 10-55 weight %, particularly 20-50 weight %.If the amount of fiber base material is lower than 10 weight %, absorber 4 is understood owing to the mutual winding of shortage between the fiber of fiber base material, and is torn or torsional deformation in use.If it surpasses 55 weight %, just can not obtain slim absorbent commodity.
Should satisfy above-mentioned condition (2) and (3) at this used super-absorbent polymer.That is to say that (2) according to the centrifuge dehydration method, the normal saline Absorption of described super-absorbent polymer is for being no less than 25g/g; (3) liquid of described super-absorbent polymer is no more than 20 seconds by the time, and this measures according to following method: with the described super-absorbent polymer of 0.5g put into be equipped with normal saline, cross-sectional area is 4.91cm
2In the cylinder of (internal diameter is 25mm φ),, after the super-absorbent polymer of swelling sinks, measure the 50ml normal saline then by the required time of described super-absorbent polymer so that make described super-absorbent polymer swelling until saturated with normal saline.
According to " the normal saline Absorption " of condition (2) (below be sometimes referred to as the water Absorption) be super-absorbent polymer water absorbability can measure.If the water Absorption is lower than 25g/g, even total be 45 weight % or higher with the amount of the restatement super-absorbent polymer of absorber 4, the absorbent commodity of gained can not have enough absorbabilities yet.The water Absorption is high more makes an appointment, but considers practical situation, and preferred water Absorption scope is 25-65g/g, particularly 35-65g/g.The measuring method of water Absorption will be described in detail in the embodiment of back.
" liquid passes through the time " according to condition (3) is measuring of super-absorbent polymer generation gel blockage.If liquid is by being to be longer than 20 seconds, be 45 weight % or higher with the usage ratio of total restatement super-absorbent polymer of absorber, this will cause gel blockage, and hinders its absorbent properties of performance.Liquid is short more good more by the time, but considers practical situation, and preferable range is 2-20 second, particularly 2-25 second.To carry out concrete description to measuring liquid by time method in an embodiment.
As long as satisfy condition (2) and (3), the kind of used super-absorbent polymer is just had no particular limits.The example of suitable super-absorbent polymer comprises sodium polyacrylate, acrylic acid-ethylene alcohol copolymer, crosslinked sodium polyacrylate, starch-acrylic acid-grafted polymer, isobutene-maleic anhydride copolymer and their saponification resultant, polyacrylic acid potassium and polyacrylic acid caesium.The super-absorbent polymer of (2) and (3) of satisfying condition can obtain by the following method: form the gradient of crosslink density on the surface of super-absorbent polymer particles, or super-absorbent polymer particles is made non-sphere and irregular shape.More specifically, please referring to the disclosed method of the 7th row 28 row-Di 9 row, 6 row of Japanese Patent Application Publication 184956/95, the document is incorporated herein by reference.
If satisfy condition (2) and (3), just can prevent super-absorbent polymer generation gel blockage effectively, and thereby can be in absorber use in a large number, can reduce the thickness of absorber thus.
Above-mentioned fiber base material and super-absorbent polymer can be present in the absorber 4 with mixing, or super-absorbent polymer is present among the fiber base material from becoming one deck.The fiber base material can be for wherein being placed with the stacked form of fine fiber base material, or as the sheet-form of paper or non-woven fabrics and so on.
For guarantee actual absorbent properties as absorbent commodity the time, super-absorbent polymer is preferably with 10-1000g/m
2, 20-500g/m particularly
2Unit Weight use.
Because therefore the amount of used super-absorbent polymer big than fiber base material, compared with conventional absorber in absorber 4, the thickness of absorber 4 is thinner.Thereby, can draw also thinner than routine of disposable diaper 1 very naturally.Particularly, the thickness of disposable diaper 1 is at 2.5g/cm
2Be preferably 1.0-4.0mm during load, be preferably 1.0-3.0mm especially.
Below with reference to Fig. 3 to being described as disposable diaper according to second embodiment of the absorbent commodity of first aspect present invention.Fig. 3 be the major part of disposable diaper along the schematic cross-sectional on its width, this disposable diaper is as second embodiment of the absorbent commodity of first aspect present invention.
Only to setting forth with the first above-mentioned embodiment difference in second embodiment.Although do not point out, above-mentioned description to first embodiment also is applicable to the second embodiment something in common.In Fig. 3, the parts identical with Fig. 1 and 2 illustrate with identical numeral.
The absorber 4 that is used in second embodiment as shown in Figure 3 comprises two or more layers (having only two-layer) in Fig. 3; At least one of them is 15 (being called " the fiber base bed of material " later on) of layer that comprise above-mentioned fiber base material, and one deck is 16 (being called " containing polymeric layer " later on) of layer that comprise above-mentioned super-absorbent polymer or super-absorbent polymer and fiber base material mixture at least in addition.These layers alternately are stacked together mutually, form absorber 4.Having so, the absorber 4 of structure is that preferably its reason is as follows.Even swelling takes place super-absorbent polymer, make that the winding between the fiber of the fiber base material in containing polymeric layer 16 reduces, but the winding of the fiber base material in the fiber base bed of material 15 can not reduce after absorb body fluids.Therefore, although absorber is very thin, be difficult to tear or be out of shape.
As shown in Figure 3, contain polymeric layer 16 and be arranged on the side near top layer material 2, and the fiber base bed of material 15 is arranged near on the side of backsheet 3.By pressing, contain polymeric layer 16 and closely contact mutually with the fiber base bed of material 15.
The fiber base bed of material 15 in the absorber 4 can be the stacked form that wherein is placed with the fine fiber base material, or as the sheet-form of paper or non-woven fabrics and so on.
Particularly preferably be, one deck fiber base bed of material 15 is to be made by the sheet material or the non-woven fabrics that contain hydrophilic fibre such as paper (as absorption paper) at least.Use the fiber base bed of material 5 of sheet-form to be better than the stacked form that use wherein is placed with the fine fiber base material; Because the former can prevent that absorber is torn in use or is out of shape.
If the fiber base bed of material 15 is sheet materials, keep and reduce the angle of the thickness of absorber 4 from the shape of absorber 4 in actual use, the Unit Weight of preferred sheet material is 5-200g/cm
2, 10-100g/cm particularly
2
The polymeric layer 16 that contains in the absorber 4 is the layers that contain polymer, for improving the bonding between the layer 15 and 16, preferably containing polymeric layer 16 forms by the following method: disperse a spot of water or contain the aqueous solution of adhesive ingredients on the fiber base bed of material 15, as latex, with wettable layer 15, and then disperse the super-absorbent polymer of scheduled volume thereon.
On the other hand, if contain polymeric layer 16 are the layers that comprise the mixture of super-absorbent polymer and fiber base material, this layer is preferably by the 50-95 weight portion, and particularly the fiber base material of the super-absorbent polymer of 55-75 weight portion and 5-45 weight portion, particularly 25-45 weight portion is formed.In the case, preferably, super-absorbent polymer is evenly dispersed in and contains on the polymeric layer 16.
Below with reference to Fig. 4 to being described as disposable diaper according to the 3rd embodiment of the absorbent commodity of first aspect present invention.Fig. 4 be the major part of disposable diaper along the schematic cross-sectional on its width, this disposable diaper is as the 3rd embodiment (corresponding to Fig. 3) of the absorbent commodity of first aspect present invention.
Only to setting forth with the first and second above-mentioned embodiment differences in the 3rd embodiment.Although do not point out, above-mentioned description to first and second embodiments also is applicable to the 3rd embodiment something in common.In Fig. 4, the parts identical with Fig. 1-3 illustrate with identical numeral.
The absorber 4 that is used in the 3rd embodiment as shown in Figure 4 comprises three layers, wherein, one deck is the layer that comprises above-mentioned super-absorbent polymer or above-mentioned super-absorbent polymer and fiber base material mixture (is above-mentioned contain polymeric layer 16), this layer is clipped in two layers that contain identical or different fiber base material, between the promptly above-mentioned fiber base bed of material 15 and 15.Having so, the absorber 4 of structure is that preferably its reason is as follows.Similar to second embodiment, although absorber is very thin, be difficult to tear or be out of shape.In addition, owing to be clipped between the fiber base bed of material 15 and 15, the super-absorbent polymer that contains in the polymeric layer 16 can fall down from absorber 4 hardly.
According to the type or the purposes of used absorbent commodity, clipping the fiber base bed of material 15 and 15 that contains polymeric layer 16 can be identical or different fiber base material.
Below with reference to Fig. 5 to being described as the 4th embodiment according to the absorbent commodity of first aspect present invention.Fig. 5 be the major part of disposable diaper along the schematic cross-sectional on its width, this disposable diaper is as the 4th embodiment (corresponding to Fig. 3) of the absorbent commodity of first aspect present invention.
Only to setting forth with first to the 3rd above-mentioned embodiment difference in the 4th embodiment.Although do not point out, above-mentioned description to first to the 3rd embodiment also is applicable to the 4th embodiment something in common.In Fig. 5, the parts identical with Fig. 1-4 illustrate with identical numeral.
In the 4th embodiment, the top layer material comprises the thermoplastic resin fibre; With total restatement of absorber, absorber comprises the super-absorbent polymer of 45-90wt% and thermoplastic resin particle or the fiber of 0.5-20wt%; And the top layer material is that hot adhesion is on the thermoplastic resin particle or fiber of absorber.
As shown in Figure 5, absorber 4 comprises super-absorbent polymer particles 63 and thermoplastic resin particle or fiber 65, but also contains the paper pulp fiber as fiber base material 64.Super-absorbent polymer particles 63, thermoplastic resin particle or fiber 65 and fiber base material 64 mix equably and are scattered among the absorber 4.
With total restatement of absorber 4, absorber 4 preferably comprises the super-absorbent polymer of 45-90wt%, and it be the reasons are as follows.If the ratio of super-absorbent polymer is lower than 45wt%, the thickness of absorber must increase, so that have enough absorbabilities, but like this thickness of diaper also is increased.If surpass 90wt%, the shape retention of absorber then can be relatively poor, or super-absorbent polymer particles can fall down when humidity.
Preferably, the 0.5-20wt% of absorber 4 gross weights comprises the granule or the fiber of thermoplastic resin.As described later, thermoplastic resin particle or fiber are to be used for forming as one by hot adhesion and top layer material 2 and backsheet 3 (if desired), increase the Liquid Absorption rate and the shape retention of absorber 4 with this.Therefore, if the ratio of the granule of thermoplastic resin or fiber is lower than 0.5wt%, with the hot adhesion of top layer material 2 or backsheet 3 just may be not firm.If surpass 20wt%, absorber has just become hydrophobic on the whole, or thermoplastic resin particle or fiber can become thin film, impairs absorbability.The ratio of thermoplastic resin particle or fiber is preferably 5-15wt%.
Thermoplastic resin can be a granule or fibrous, also can be the mixture of granule and fiber.
Preferably, super-absorbent polymer and thermoplastic resin particle or fiber account for the 45.5wt% at least of absorber 4 gross weights or more, particularly 55wt% or more altogether.Can comprise aforesaid fiber base material with the other materials that super-absorbent polymer and thermoplastic resin particle or fiber constitute absorber 4.If other materials is arranged, with total restatement of absorber 4, its ratio is preferred maximum to 54.5wt%.
In absorber 4, the weight ratio of super-absorbent polymer and thermoplastic resin particle or fiber is preferably 99: 1-50: 50, still preferred 90: 10-75: 25.If weight ratio is within above-mentioned scope, can guarantee whole absorber 4 shape retention and with the hot adhesion of top layer material 2, but can not hinder absorbability.If outside above-mentioned scope, absorb to hinder prevent or the degree of hot adhesion just insufficient.
From a) reducing thickness, the b) flexibility of whole absorbent commodity, c) packing is compact, and d) angle that reduces weight sees that the Unit Weight of absorber 4 integral body is preferably 100-1000g/m
2, 200-700g/m particularly
2, and its gross thickness is at 0.5g/cm
2Be preferably 0.5-10mm under the load, particularly 0.5-5mm.
Used thermoplastic resin particle or fiber are selected from and can form those of one by hot adhesion and top layer material 2 (if necessary and backsheet 3).This type of thermoplastic resin comprises vistanex, as polyethylene and polypropylene; Mylar is as polyethylene terephthalate; And polyamide, as nylon.Thermoplastic resin can with top layer material or backsheet in identical.
When using granular thermoplastic resin, from aspects such as preventing of hindering of uniformly dispersed, machinability and absorbability, particulate mean diameter is 10-2000 μ m, particularly 50-1000 μ m.
On the other hand, if the thermoplastic resin that uses is fibrous, fiber can be any long fibre, as successive long filament, and short fiber, as staple fiber.From uniform mixing, uniformly dispersed and heat treated easy on, fibre diameter is preferably the 0.2-10 dawn, particularly the 1-6 dawn.Particularly preferred fiber is the two component conjugate fibers that are made of high-melting-point component and low melting point component, as core/sheath type conjugate fiber and parallel type conjugate fiber.
As shown in Figure 5, thermoplastic resin particle in absorber 4 or fiber 65 are bonded in by hot adhesion with the top layer material 2 that comprises thermoplastic resin.Particularly, at least a portion of thermoplastic resin particle or fiber 65 and top layer material 2 hot adhesions together, like this, absorber 4 and top layer material 2 are bonded to an integral body.By hot adhesion, absorber 4 and top layer material 2 form an integral body, but to permeability and not influence of liquid-absorbent.Consequently, the shape retention of absorber 4 is improved; Reduced because the leakage that distortion or distortion cause; And diaper also can have good surface appearance when dressing.As previously discussed, do not need whole thermoplastic resin particles or fiber 65 hot adhesions on top layer material 2.Neededly be, be at least the thermoplastic resin particle of contiguous top layer material 2 or fiber 65 hot adhesions on top layer material 2, make top layer material 2 and absorber 4 form an integral body thus.
Further preferably, thermoplastic resin particle or fiber 65 form space network at the mutual hot adhesion in the inside of absorber 4 together.This space network can not only prevent effectively that super-absorbent polymer particles 63 from gel blockage taking place when swelling, but also can further improve the shape retention of absorber 4.
" form an integral body " at this used term and be meant that top layer material 2 and absorber 4 have the shape retention of following degree, that is: when diaper was got wet by liquid such as water, they still kept given shape, and are not separated from each other out.
As shown in Figure 5, further preferably, thermoplastic resin particle in the absorber 4 or fiber 65 form an integral body with the backsheet 3 that contains thermoplastic resin by hot adhesion.In the case, the shape retention of absorber 4 can be further improved; Further reduce because the leakage that distortion or distortion cause; And the outward appearance of diaper when dressing is better.
Disposable diaper 1 according to this embodiment is preferably made by the following method: stack top layer material 2; the homogeneous mixture of super-absorbent polymer particles 63, thermoplastic resin particle or fiber 65 and fiber base material 64; backsheet 3 then thereon again superposes; with the predetermined temperature hot-air or by hot embossing with the resulting structures hot adhesion together; make top layer material 2 thus; thermoplastic resin particle or fiber 65 and backsheet 3 form an integral body.
In the present invention, comprising the microperforated sheet that the sheet material of polyolefin and filler obtains by uniaxial tension at least is particularly preferred as backsheet 3.
Should the preferred microperforated sheet of using comprise that the molding sheet material of the mixture that comprises crystalline polyolefin resin and chemical compound (filler) by stretching at least one direction obtained sheet material, wherein said chemical compound dissolves each other with crystalline polyolefin under molten condition, but when the crystallization temperature of crystalline polyolefin resin or when being lower than this temperature, this chemical compound and crystalline polyolefin generation phase separation (hereinafter referred to as microperforated sheet A).
Though it is unrestricted, crystalline polyolefin comprises low density polyethylene (LDPE), medium density polyethylene, high density polyethylene (HDPE), linear low density polyethylene, vinyl-vinyl acetate copolymer, ethylene-acrylic acid copolymer, polypropylene, ethylene-propylene copolymer, propene-1-butene copolymer, ionomer resin and their polyblend.Among them preferably: acrylic resin, the polyblend of acrylic resin and ethylene-propylene copolymer resin, and the polyblend of acrylic resin and polyvinyl resin.The crystalline polyolefin resin of part can be replaced with mylar, and as polyethylene terephthalate and polybutylene terephthalate (PBT), its ratio is advisable not undermine the inherent performance of crystalline polyolefin.
Crystalline polyolefin resin preferably has the melt index (MI) of 15g/10min or lower, particularly 0.2-12g/10min, and it be the reasons are as follows.Melt index (MI) can provide melt tension required in the sheet material forming process for 15g/10min or lower crystalline polyolefin resin, and can be molded as sheet material at a high speed with stable manner.If melt index (MI) is lower than 0.2g/10min, just need high energy to extrude the formation sheet material, this makes productivity reduce.At this used term " melt index (MI) " is the numerical value that obtains according to ASTM D-1238, that is: for polypropylene and polyethylene and ethylene copolymers, load is 2.16kgf, and temperature is 230 ℃; For polyethylene, load is 2.16kgf, and temperature is 190 ℃.
Chemical compound (filler)--another component in the mixture is to dissolve each other with crystalline polyolefin under molten condition, but when the crystallization temperature of crystalline polyolefin resin or when being lower than this temperature, with the chemical compound of crystalline polyolefin generation phase separation.Though unrestricted, this chemical compound comprises various hydro carbons, as liquid paraffin, alpha-olefin low polymers, mineral oil, synthetic lubricant fluid, solvent naphtha, and paraffin; And the various aliphatic carboxylic acids esters pure with (polynary), as dioctyl phthalate, diethyl phthalate, trimethylolpropane laurate, adipic acid distearyl ester and 1,2,4,5-benzenetetracarboxylic acid four monooctyl esters.Mineral oil, synthetic lubricant fluid, paraffin, and the ester of aliphatic carboxylic acid and (polynary) alcohol is preferred among them.Partially mixed thing can be used water repellent, replaces as silicone oil, and its ratio is not advisable to not undermining the inherent performance of mixture with little.
Mixture preferably is made of the crystalline polyolefin resin of 50-90 weight portion and the chemical compound of 10-50 weight portion.If the amount of chemical compound is lower than 10 weight portions, mixture just can not make microperforated sheet A have enough poisture-penetrabilitys.If surpass 50 weight portions, the mechanical strength of the microperforated sheet A of gained is then not enough, and chemical compound can ooze out from microperforated sheet A when long term storage.Mixture is preferably by the 60-80 weight portion, and particularly the crystalline polyolefin resin of 60-75 weight portion and 20-40 weight portion, the particularly chemical compound of 25-40 weight portion constitute.
If desired, except that crystallization vistanex and chemical compound, also can comprise other additive in the mixture, as nucleator.The preferred nucleator that uses is to increase the degree of crystallinity of crystalline polyolefin.In the mixture of per 100 weight portions, the preferred use amount of nucleator is the 0.01-3 weight portion, preferred 0.05-1 weight portion, and it be the reasons are as follows.If the amount of nucleator is lower than 0.01 weight portion, just can not produce enough nucleations.If surpass 3 weight portions, the microperforated sheet A of gained does not then have enough poisture-penetrabilitys.
Though unrestricted, available nucleator comprises 1.3-, the 2.4-dibenzyl sorbitol, 1.3-, two 2.4-(to the methyl benzal) sorbitol, 1.3-, two (to the ethyl benzal) sorbitol of 2.4-, two (4-t-butyl-phenyl) sodium phosphate, adipic acid, benzoic acid, sodium benzoate, Talcum, titanium dioxide and Kaolin.
Other additives that can sneak in the mixture comprise inorganic filler (as calcium carbonate), stabilizing agent (as antioxidant), antistatic additive, organic pigment, and dyestuff.The use amount of these additives is per 100 weight portion mixture 0.01-10 weight portions, preferred 0.1-5 weight portion.
Mixture is extruded by blown film or T type punch die is extruded and is molded as sheet material, and uniaxial tension resulting sheet at least then is to obtain having the sheet material of continuous micropore and poisture-penetrability.With the areameter at least one direction, preferably be that 1.2-5 stretches with the draw ratio.If draw ratio is lower than 1.2, just can not form enough micropores, so that enough poisture-penetrabilitys to be provided.If draw ratio surpasses 5, because can being torn or obtaining sheet material when stretching, sheet material is easy to be torn, so be difficult to carry out stable production.Be the quality of satisfaction guaranted and enough poisture-penetrabilitys, still the draw ratio of preferred 1.2-3.
Can be used for uniaxial tension with single shaft roller stretching-machine when stretching, or be used for simultaneously or successive biaxial stretching with stenter or axle stretching-machine.Can heat sheet material in the tensile while.
Be preferred for microperforated sheet among the present invention and also comprise the sheet material (hereinafter referred to as microperforated sheet B) that comprises crystalline polyolefin resin by at least one direction, stretching and obtain with the molding sheet material of the mixture of inconsistent thermoplastic resin of crystalline polyolefin resin or filler.
The filler that can be used for this comprises and is generally used among rubber or the plastics those, as inorganic filler, as calcium carbonate, Gypsum Fibrosum, calcium sulfate, calcium phosphate, magnesium carbonate, magnesium sulfate, silicate hydrate, anhydrous silicic acid, soda ash, sodium chloride, sodium sulfate, barium sulfate, Talcum, clay, various Calx, volcanic ash, shirasu, titanium dioxide, ferrum oxide and carbon black; Various metal dusts; Other inorganic substances; The organic metal salt that mainly comprises inorganic substances.Also comprise thermosetting resin in the filler, as phenolic resins, epoxy resin and sodium polyacrylate; The thermoplastic resin of crosslinked (by radiation-induced) is as polyethylene, polypropylene and polyacrylate; Be higher than the resin of the molding temperature of crystalline polyolefin with fusing point.Desirablely be, these fillers use with particulate form, and its mean diameter is not more than 50 μ m, particularly at about 0.05-30 μ m, and especially about 0.1-5 μ m.
The preferred use amount of filler is per 100 weight portion crystalline polyolefin 50-400 weight portions, particularly 60-300 weight portion.If the amount of filler is lower than 50 weight portions, the continuous micropore quantity that forms in the microperforated sheet B of gained will reduce, and causes poisture-penetrability to descend.If surpass 400 weight portions, the formation of sheet material and follow-up stretching just are difficult to carry out.
Filler is preferably united use with softening agent.The plasticizer and the lubricant that are generally used among rubber and the plastics all can be used as softening agent.The example of available softening agent comprises the monoesters that is made by fatty acid and aliphatic alcohol, the list or the polynary ester that make by aromatic carboxylic acids and aliphatic alcohol, the polynary ester that makes by fatty polybasic carboxylic acid and polyhydric alcohol, the polynary ester that makes by monocarboxylic acid and/or polybasic carboxylic acid and unit alcohol and/or polyhydric alcohol, ester or polynary ester with residual alcoholic extract hydroxyl group and/or residual carboxyl, fatty acid amide, aromatic amides, the metallic soap of fatty acid, the metallic soap of aromatic carboxylic acids, the dibutene oligomer, butene low polymers, isobutylene oligomer, the isoprene oligomer, Petropols, cumarone resin, ketone resin, chlorinated paraffin wax, silicone oil, liquid paraffin, and Tissuemat E.
Though the use amount of softening agent can be according to the affinity between softening agent and the crystalline polyolefin resin, affinity between softening agent and the filler, and the required property of softening of microperforated sheet B changes, but this amount is preferably per 100 weight portion crystalline polyolefin resin 0-20 weight portions, particularly 0.1-10 weight portion.
On the other hand, comprise styrene polymer with the inconsistent thermoplastic resin of crystalline polyolefin resin, as general polystyrene, the polystyrene of impact, acrylonitritrile-styrene resin, BS, and acrylonitrile-butadiene-styrene copolymer; Polymethyl methacrylate; Polyester is as polyethylene terephthalate and polybutylene terephthalate (PBT); Polyamide is as nylon 6 and nylon 66; Merlon; Polyacrylonitrile; The modification of these thermoplastic resins or derived polymer; And their two or more mixture.The dispersibility of these thermoplastic resins can be controlled easily by add one or more following polymer in thermoplastic resin: thermoplastic elastomer (TPE), as styrene polymer, polyolefin, polyurethane, polyester, polyamide, poly-(1, the 2-butadiene), poly-(anti-form-1,4-isoprene) or the like.Wish to use the thermoplastic resin of dispersity, its mean diameter is for being not more than 50 μ m, particularly at about 0.05-30 μ m, and especially about 0.1-5 μ m.
The use amount of thermoplastic resin is preferably per 100 weight portion crystalline polyolefin resin 10-100 weight portions, particularly 20-100 weight portion.
If the use thermoplastic resin, it preferably with as employed identical softening agent when using filler unites use.The amount of softening agent is used identical during with filler.
For other details of microperforated sheet B, aforementioned description to microperforated sheet A is also applicable.
With reference to accompanying drawing 6-9 the preferred embodiment of the present invention's second aspect is described.Fig. 6-9 schematically shows the amplification cross-sectional view of absorbent structure of the preferred embodiment of the absorbent commodity that is used for second aspect present invention respectively.
Only to setting forth with first to fourth embodiment difference of first aspect present invention in these embodiments.Although do not point out, the above-mentioned something in common that the description of first to fourth embodiment also is applicable to second aspect present invention.In Fig. 6-9, the parts identical with Fig. 1-5 illustrate with identical numeral.
According to the disposable diaper of these embodiments structurally with shown in Figure 1 identical, its difference is: absorber has first absorbed layer and second absorbed layer, first absorbed layer comprises the super-absorbent polymer (A) that satisfies above-mentioned condition (3), and second absorbed layer comprises the super-absorbent polymer (B) of meet the following conditions (4); Super-absorbent polymer (A) and super-absorbent polymer (B) exist with the form that can not mix mutually basically; And first absorbed layer be arranged near top layer material one side, and second absorbed layer is arranged near backsheet one side.
(4) the normal saline absorbance of described super-absorbent polymer (B) is no less than 5g/30sec/0.3g, and this value is held wettability (DW) method according to need and recorded.
Be not meant that this used " not mixing mutually basically " existence of super-absorbent polymer (A) and super-absorbent polymer (B) does not undermine their characteristics separately mutually.
Super-absorbent polymer (A) and super-absorbent polymer (B) do not mix mutually basically preferably and to realize in the following manner: (i) by super-absorbent polymer (A) or (B) and the mixture of fiber base material form in first absorbed layer and second absorbed layer at least one, or (ii) first absorbed layer and second absorbed layer are stacked respectively by the fiber base bed of material that comprises the fiber base material.
Also possible is, first absorbed layer of being made up of super-absorbent polymer (A) and second absorbed layer of being made up of super-absorbent polymer (B) are deposited in together mutually.In the case, although be difficult to be separated from each other super-absorbent polymer (A) and super-absorbent polymer (B) fully,, just can think that the mixing of this degree is not mix mutually basically so long as the characteristic of polymer is not undermined mutually.For example, if total restatement with super-absorbent polymer (A), first absorbed layer particularly comprises the super-absorbent polymer (B) that is lower than 30wt% at the neighbouring part at the interface of itself and second absorbed layer in the interface, the mixing of this degree can be thought the state that do not mix mutually basically.
For super-absorbent polymer (A), the description of the present invention's first aspect also is suitable for.On the other hand, super-absorbent polymer (B) is the polymer of (4) of meeting the following conditions.
(4) the normal saline absorbance of described super-absorbent polymer (B) (the following water absorbance that abbreviates as sometimes) is no less than 5g/30sec/0.3g, is preferably 6-15g/30sec/0.3g, and this value is held wettability (DW) method according to need and recorded.
If above-mentioned water absorbance is lower than 5g/30sec/0.3g, it is too fast that super-absorbent polymer itself absorbs liquid, causes keeping the ability drop of drained liquid, and therefore can not reduce the amount of fiber base material.
The DW method of measuring the water absorbance will be described later in an embodiment.
As long as satisfy condition (4), (B) just has no particular limits to super-absorbent polymer.The example of suitable super-absorbent polymer (B) is: sodium polyacrylate, acrylic acid-ethylene alcohol copolymer, crosslinked sodium polyacrylate, starch-acrylate graft copolymer, isobutene-maleic anhydride copolymer and saponification resultant, polyacrylic acid potassium and polyacrylic acid caesium.These polymer use with the form of granule or fiber.
In (A) and gross weight (B) is 100, and super-absorbent polymer (A) and weight ratio (B) are preferably 90-30: 10-70, particularly 80-50: 20-50.
If the ratio of super-absorbent polymer (A) surpasses 90, the hold facility of drained liquid then can descend.If be lower than 30, gel blockage will take place, cause the reduction of absorbent properties.
From obtaining the angle of slim absorbent commodity, the gross weight of super-absorbent polymer (A) and super-absorbent polymer (B) preferably is not less than 45wt%, particularly 45-90wt%, the especially 50-80wt% of absorber gross weight.
Description 6-9 sets forth the structure according to the absorber of these embodiments.
In second absorbed layer 30, super-absorbent polymer (B) 73 mixes with fiber base material 74.
Absorber 4a as shown in Figure 7 is a four-layer structure, comprise the first absorbed layer 20a that contains super-absorbent polymer (A) 72a, the second absorbed layer 30a by super-absorbent polymer (B) 73a formation, with a pair of absorption ply of paper 50a, this absorption ply of paper is made by absorption paper, and is placed on the outside of the first absorbed layer 20a and the second absorbed layer 30a.In this structure, the super-absorbent polymer of setting (A) 72a and super-absorbent polymer (B) 73a do not mix basically mutually.
In the first absorbed layer 20a, super-absorbent polymer (A) 72a and fiber base material 74a mix.
Absorber 4b as shown in Figure 8 is a four-layer structure, comprise the first absorbed layer 20b that contains super-absorbent polymer (A) 72b, the second absorbed layer 30b that comprises super-absorbent polymer (B) 73b, with a pair of absorption ply of paper 50b, this absorption ply of paper is made by absorption paper, and is placed on the outside of the first absorbed layer 20b and the second absorbed layer 30b.In this structure, super-absorbent polymer (A) 72b and super-absorbent polymer (B) 73b do not mix basically mutually.
In the first absorbed layer 20b and the second absorbed layer 30b, super-absorbent polymer (A) 72b and (B) 73b mix with fiber base material 74b respectively.
Absorber 4c shown in Figure 9 has the first absorbed layer 20c that is made of super-absorbent polymer (A) 72c, with the second absorbed layer 30c that is made of super-absorbent polymer (B) 73c, super-absorbent polymer (A) 72c and super-absorbent polymer (B) 73c do not mix basically mutually.
The first absorbed layer 20c and the second absorbed layer 30c are separated from each other stacking, wherein are fiber base bed of material 40c.Therefore, absorber 4c is a five-layer structure, comprises the first absorbed layer 20c, the second absorbed layer 30c, fiber base bed of material 40c and a pair of absorption ply of paper 50c, this absorption ply of paper is made by absorption paper, and is placed on the outside of the first absorbed layer 20c and the second absorbed layer 30c.
Absorption ply of paper among Fig. 6-9 not necessarily or absorbs the side that ply of paper only is arranged on absorber.
The Unit Weight of the absorber in the above-mentioned embodiment is preferably 100-1000g/m
2, thickness is 0.5-5.0mm.
The absorber of these embodiments prepares in order to the below method.As the absorber 4 of Fig. 6 and 7 and the preparation method of 4a be: at first the mixture with super-absorbent polymer and fiber base material is shaped to fleece with common mode, obtain comprising first and second absorbed layers of the mixture of super-absorbent polymer and fiber base material, then gained the layer on reshaping comprise another kind of super-absorbent polymer the layer, at last the gained layer is clipped between a pair of absorption paper.
The preparation method of absorber 4b as shown in Figure 8 is as follows: at first be shaped to fleece by the mixture with super-absorbent polymer and fiber base material with common mode, form first and second absorbed layers respectively, two layers are put together mutually, then the gained layer is clipped between a pair of absorption paper.
The preparation method of absorber 4c as shown in Figure 9 is as follows: at first form the fiber base bed of material with common mode, with super-absorbent polymer (A) with (B) be placed on the surface and the back side of the fiber base bed of material respectively, then the gained layer is clipped between a pair of absorption paper.
Disposable diaper 1 according to the embodiment of absorber with arbitrary said structure, it has absorbability stably to urinating first, even used absorber is very thin, this absorbent commodity can not take place because the absorbability that gel blockage causes hinders when a step urinates again yet.Therefore, disposable diaper 1 has excellent absorbability, and can not produce leakage.
Though absorbent commodity of the present invention (comprising first and second aspects of the present invention) is described in detail according to embodiment preferred, but should not think that the present invention only limits to these embodiments, but also can carry out various modifications and improvement it.
For example, in embodiment as shown in Figure 3, wherein absorber 4 comprises the single fiber base bed of material 15 and the single polymeric layer 16 that contains, it also can comprise more than one the fiber base bed of material 15 and/or more than one contain polymeric layer 16.
In absorber 4 as shown in Figure 5, wherein use paper pulp fiber as fiber base material 64, but can also use soda pulping, carboxy methylation paper pulp, artificial silk, Cotton Gossypii to wait to replace or mix paper pulp fiber.
In Fig. 5, the sheet material that comprises above-mentioned thermoplastic resin particle or fiber can insert among absorber 4 and the top layer material 2 or among absorber 4 and the backsheet 3, thus with the thermoplastic resin particle in the sheet material or fiber and top layer material 2 or backsheet 3 hot adhesions.
Above-mentioned embodiment also can be shared above explanation.
The present invention is not only applicable to above-described disposable diaper, also can be used as other absorbent commodities, as sanitary towel, and urinary incontinence pad and Breast feeding pad etc.
Embodiment
Now the advantage of absorbent commodity of the present invention is further elaborated, but it will be appreciated that the present invention is not intended to only limit to this according to embodiment.
In embodiment and Comparative Examples, will measure normal saline absorbability according to following method according to the centrifuge dehydration method, liquid is by the time, according to the normal saline absorbance of the super-absorbent polymer of DW method and the normal saline saturated absorption of the fiber base bed of material.Measure the normal saline absorbability of super-absorbent polymer according to the centrifuge dehydration method:
With the normal saline swelling 1g super-absorbent polymer of 150ml 30 minutes.The polymer of swelling is put into 250 purpose nylon net bags, under 143G, in whizzer, dewatered 10 minutes then, measure gross weight (weight that comprises bag).Calculate normal saline absorbability (g/g) according to following formula (I) according to centrifugal separation:
According to normal saline absorbability=((gross weight)-(weight of nylon net bag)-(weight of polymer)-(remaining in the weight of the normal saline on the nylon net bag))/(weight of polymer) of centrifuging (I) liquid of super-absorbent polymer pass through the time:
In device 80 (internal diameter of column part is that 25mm, length are the glass drop fixed tube of about 250mm) as shown in figure 10, put into the super-absorbent polymer P of 0.5g, inject the normal saline W of excess then thereon, so that super-absorbent polymer P swelling is to balance.After reaching balance, regulate liquid level to 200mm, turn on cock (internal diameter: 4mm) then.After the polymer P of determining swelling has avaled fully as shown in figure 10, cut-out tap.Metering normal saline W got this value and passes through the time (sec) as liquid by the needed time of distance (as shown in figure 10, being equivalent to 50ml) between two scale L and the M.The normal saline saturated absorption of the fiber base bed of material:
Cut next 20cm * 15cm (300cm from the fiber base bed of material
2) sample, it was immersed in the normal saline of 150ml 30 minutes, be placed on then on the 80 purpose wire nettings, make leakage liquid under.After infra leaked 30 minutes, measure gross weight (weight that comprises wire netting), to calculate the saturated absorption (g/cm of normal saline according to formula (II)
2):
The saturated absorption of normal saline=((gross weight)-(weight of wire netting)-(weight of the fiber base bed of material)-(remaining in the weight of the normal saline on the wire netting))/(area of the fiber base bed of material) (II) measured the absorbance of normal saline according to the DW method:
Use device 81 as shown in figure 11, it is the known wettability tester that needs to hold.As shown in figure 11, normal saline W is injected tester, two liquid levels are maintained an equal level, the super-absorbent polymer P with 0.3g is dispersed in carriage 82 (diameter: 70mm φ then; 1 flint glass F filter is placed with filter paper No. 2 on it) on.Water during with dispersed polymeres absorbs counts 1, by reading the scale on the burette 83, and the decline of the liquid level of this graduation apparatus open-birth reason saline W, the water that measures behind the 30sec absorbs.The value of being measured is promptly as the normal saline absorbance.Embodiment 1
On the non-spinning paper lodicule material (1) (its preparation method is as follows: purified paper pulp lay is become stacked form, with binding agent fiber is bonded to sheet material then) that dry method makes, the normal saline saturated absorption of this sheet material is 0.15g/cm with a spot of aqueous dispersion
2Then super-absorbent polymer (I) (at the cross-linked sodium polyacrylate granule that on its surface portion is high crosslink density) is evenly dispersed on this sheet material, formation contains polymeric layer, the normal saline absorbability that described super-absorbent polymer is measured according to the centrifuge dehydration method is 29g/g, and liquid is 12sec by the time.Containing placement paper pulp absorption paper (2) (being obtained by paper pulp by the wet papermaking method) on the polymeric layer, the normal saline saturated absorption of this absorption paper is 0.04g/cm
2Suppress resulting layer, obtain the absorber (a) of disposable diaper.With total restatement of absorber (a), the ratio of super-absorbent polymer (I) is 59wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (a) is 0.19g/cm
2
On non-spinning paper lodicule material (1) side that dry method makes, place hydrophilic polypropylene non-woven fabric as the top layer material, on paper pulp absorption paper (2) side, place polyethylene film then, obtain disposable diaper (A) thus as backsheet.The disposable diaper of gained (A) is 2.5g/cm in load
2Shi Houdu is 2.0mm.Embodiment 2
The absorber (b) and the disposable diaper (B) that are used for disposable diaper by the method manufacturing identical with embodiment 1, but difference is: (its surface portion is the cross-linked sodium polyacrylate granule of high crosslink density with super-absorbent polymer (II), suppose that its crosslink density is lower than the crosslink density of super-absorbent polymer (I)) replacement super-absorbent polymer (I), this super-absorbent polymer (II) according to the centrifuge dehydration method measure the normal saline absorbance be 37g/g, its liquid is 17sec by the time.
With total restatement of absorber (b), the ratio of super-absorbent polymer (II) is 59wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (b) is 0.19g/cm
2The disposable diaper of gained (B) is 2.5g/cm in load
2Shi Houdu is 2.0mm.Embodiment 3
A spot of aqueous dispersion on the non-spinning paper lodicule material (1) that dry method makes, is evenly dispersed in super-absorbent polymer (II) on this sheet material then, and formation contains polymeric layer.Containing placement repellency polypropylene non-woven fabric (3) on the polymeric layer, suppress resulting layer then, obtain the absorber (c) of disposable diaper.With total restatement of absorber (c), the ratio of super-absorbent polymer (II) is 56wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (c) is 0.15g/cm
2
Make disposable diaper (C) by the method identical with embodiment 1, but difference is: the non-spinning paper lodicule material (1) that makes with the dry method of absorber (c) is as close top layer material one side.The disposable diaper of gained (C) is 2.5g/cm in load
2Shi Houdu is 2.2mm.Embodiment 4
Refining wood pulp, the saturated absorption of lay formation normal saline is 0.12g/cm then
2Pulp layer (4).The mixture that to make with extra care wood pulp and super-absorbent polymer (I) is placed on the pulp layer (4), forms to contain polymeric layer.Suppress the layer of gained, obtain being used for the absorber (d) of disposable diaper.With total restatement of absorber (d), the ratio of super-absorbent polymer (I) is 63wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (d) is 0.12g/cm
2
Make disposable diaper (D) by the method identical, but difference is with embodiment 1: with the pulp layer (4) of absorber (d) as near top layer material one side.The disposable diaper of gained (D) is 2.5g/cm in load
2Shi Houdu is 2.5mm.Embodiment 5
A spot of aqueous dispersion on paper pulp absorption paper (2), is evenly dispersed in super-absorbent polymer (II) on this absorption paper then, and formation contains polymeric layer.Containing placement hydrophilic polypropylene non-woven fabric (5) on the polymeric layer, the normal saline saturated absorption of this non-woven fabrics is 0.08g/cm
2, suppress resulting layer then, obtain the absorber (e) of disposable diaper.With total restatement of absorber (e), the ratio of super-absorbent polymer (II) is 67wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (e) is 0.12g/cm
2
Make disposable diaper (E) by the method identical, but difference is with embodiment 1: with the paper pulp absorption paper (2) of absorber (e) as near top layer material one side.The disposable diaper of gained (E) is 2.5g/cm in load
2Shi Houdu is 1.7mm.Embodiment 6
Super-absorbent polymer (I) is evenly dispersed on the pulp layer (4), and formation contains polymeric layer.Place another pulp layer (4) on the polymeric layer again containing, then compacting.With a small amount of emulsion binder be dispersed in the top of gained layer and below, drying obtains pulp layer (4) non-woven fabrics then, makes the absorber (f) that is used for disposable diaper thus.With total restatement of absorber (f), the ratio of super-absorbent polymer (I) is 53wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (f) is 0.24g/cm
2
Make disposable diaper (F) by the method identical, but difference is with embodiment 1: with the pulp layer (4) of absorber (f) F side as near top layer material one side.The disposable diaper of gained (F) is 2.5g/cm in load
2Shi Houdu is 2.6mm.Comparative Examples 1
Be used for the absorber (g) and the disposable diaper (G) of disposable diaper by the method manufacturing identical with embodiment 4, but difference is: replace pulp layer (4) with pulp layer (6), the normal saline saturated absorption of this pulp layer (6) is 0.40g/cm
2, its by refining wood pulp then this purified wood pulp of lay make.
With total restatement of absorber (g), the ratio of super-absorbent polymer (I) is 36wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (g) is 0.40g/cm
2The disposable diaper of gained (G) is 2.5g/cm in load
2Shi Houdu is 5.5mm.Comparative Examples 2
The absorber (h) and the disposable diaper (H) that are used for disposable diaper by the method manufacturing identical with embodiment 1, but difference is: replace used super-absorbent polymer (I) among the embodiment 1 with super-absorbent polymer (III) (whole particle is the cross-linked sodium polyacrylate granule of uniform relatively crosslink density), this super-absorbent polymer (III) according to the centrifuge dehydration method measure the normal saline absorbance be 3g/g, its general by the time be 33sec.
With total restatement of absorber (h), the ratio of super-absorbent polymer (III) is 59wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (h) is 0.19g/cm
2The disposable diaper of gained (H) is 2.5g/cm in load
2Shi Houdu is 2.0mm.Comparative Examples 3
The absorber (i) and the disposable diaper (I) that are used for disposable diaper by the method manufacturing identical with embodiment 4, but difference is: (whole particle is the cross-linked sodium polyacrylate granule of uniform relatively crosslink density with super-absorbent polymer (IV), its crosslink density is much higher than the crosslink density of super-absorbent polymer (III)) replace used super-absorbent polymer (I) among the embodiment 4, this super-absorbent polymer (IV) according to the centrifuge dehydration method measure the normal saline absorbance be 20g/g, its liquid is 14sec by the time.
With total restatement of absorber (i), the ratio of super-absorbent polymer (IV) is 63wt%.Total normal saline saturated absorption of the fiber base bed of material in the absorber (i) is 0.12g/cm
2The disposable diaper of gained (I) is 2.5g/cm in load
2Shi Houdu is 2.5mm.
The disposable diaper that makes in embodiment 1-6 and Comparative Examples 1-3 is prevented the leakage of urine test.Concerning each embodiment or Comparative Examples, in actual use each 200 disposable diaper is tested by 10 wearers.The test result of gained and 2.5g/cm
2The thickness of test diaper is listed in the table 1 together under the load.
Table 1
Embodiment 7
| The ratio of diaper generation leakage of urine | Diaper is at 2.5g/cm 2Thickness under the load | ||
| Embodiment | ????1 | ????1.5％ | ????2.0mm |
| ????2 | ????0.5％ | ????2.0mm | |
| ????3 | ????1.5％ | ????2.2mm | |
| ????4 | ????1.0％ | ????2.5mm | |
| ????5 | ????1.5％ | ????1.7mm | |
| ????6 | ????1.0％ | ????2.6mm | |
| Comparative Examples | ????1 | ????2.5％ | ????5.5mm |
| ????2 | ????4.5％ | ????2.0mm | |
| ????3 | ????5.0％ | ????2.5mm | |
Make suction heat bonding non-woven fabrics (Unit Weight: 25g/m with surfactant
2) possess hydrophilic property, then as the top layer material.This non-woven fabrics is made by core/sheath type conjugate fiber, and conjugate fiber comprises that fibre diameter was 3 dawn as the polypropylene of core with as the polyethylene of sheath, and blocking length is 51mm.
On non-woven fabrics, place absorber (Unit Weight: 250g/m
2), this absorber comprises the fabric of following homogeneous mixture: the refined pulp fiber of 60 weight portions, the cross-linked sodium polyacrylate granule as super-absorbent polymer of polyethylene fibre of 5 weight portions (fusing point: 110 ℃) and 100 weight portions.
With the layer of 135 ℃ hot air treatment gained, the polyethylene fibre in nonwoven cloth with thermal caking top layer material and the absorber, make top layer material and absorber form an integral body thus.
On absorber, place polyethylene sheets, to obtain disposable diaper as backsheet.
Above-mentioned used cross-linked sodium polyacrylate granule has the crosslink density of raising at its surface portion, and its normal saline absorbability of measuring according to centrifugal separation is 29g/g, and liquid is 12sec by the time.Embodiment 8
Make disposable diaper according to the method identical with embodiment 7, but difference is: being the polyethylene fibre among the polyethylene particle replacement embodiment 7 of 50 μ m with mean diameter, with total restatement of absorber, is 10wt% in this used poly ratio.Embodiment 9
To be placed on as the microperforated sheet of backsheet on the top layer material/absorbent structure (before the hot air treatment) that makes among the embodiment 7.The three-decker of gained is handled through the embossing that is heated, and makes top layer material and polyethylene fibre form an integral body by hot adhesion thus, and makes backsheet and polyethylene fibre form an integral body by hot adhesion simultaneously, obtains disposable diaper at last.
More than used backsheet be the microperforated sheet that obtains by the following method: the linear low density polyethylene (density: 0.925g/cm of uniform mixing 40 weight portions in a pair of screw mixer
2Melt index (MI): 2.1g/10min), the trimethylolpropane adipic acid stearate of the stearic acid-treated calcium carbonate of 60 weight portions and 4 weight portions is extruded by blown film mixture is molded as sheet material, then with 2.1 draw ratio uniaxial tension resulting sheet.Embodiment 10
Make disposable diaper according to the method identical with embodiment 7, but difference is: to use the normal saline absorbance of measuring by ion isolation process be 38g/g, liquid by the time is that the super-absorbent polymer of 16sec replaces used super-absorbent polymer among the embodiment 7.Comparative Examples 4
Make disposable diaper according to the method identical with embodiment 7, but difference is: with total restatement of absorber, the ratio that changes polyethylene fiber peacekeeping super-absorbent polymer respectively is 30wt% and 33wt%.The evaluation and test disposable diaper:
According to following method, to the liquid fast Absorption of (1) absorber of the disposable diaper that makes in embodiment 7-10 and Comparative Examples 4 and the separation degree of absorber and top layer material, and leak than evaluating and testing (2).Gained the results are shown in the following table 2.(1) the liquid fast Absorption of absorber
Disposable diaper is cut into the sample of 20cm * 20cm size, the normal saline of once toppling over 50ml then thereon.Separation degree based on following standard evaluation and test Liquid Absorption rapidity and absorber and top layer material.Repeat to topple over normal saline (50ml), reach capacity until Liquid Absorption.The Liquid Absorption rapidity:
A... liquid is not stayed on the surface of sample by fast Absorption
B... have a little liquid to stay on the surface, and liquid can flow from the teeth outwards
C... liquid is slowly absorbed, and the separating of flow from the teeth outwards absorber and top layer material
A... do not observe separation
C... observe separation (2) and leak ratio
Carry out the investigation of relevant leakage of urine to 10 common wearers, obtain testing the leakage ratio of disposable diaper.
Table 2
| Liquid fast Absorption/absorber separates with the top layer material | Leak ratio | |||
| Absorb for the first time | Further absorb | ????(％) | ||
| Embodiment | ????7 ????8 ????9 ????10 | ????A/A ????A/A ????A/A ????A/A | ????A/A ????A/A ????A/A ????A/A | ????1.5 ????1.4 ????1.8 ????1.5 |
| Comparative Examples | ????4 | ????B/A | ????B/C | ????7.8 |
In the disposable diaper (the present invention) of embodiment 7-10, form absorber by specific component with special ratios, make top layer material and absorber integrally formed, and the super-absorbent polymer that is included in the absorber also have specific physical property.Result by table 2 can find out obviously that these disposable diapers are more much better than the disposable diaper of Comparative Examples 4, and this shows the rapidity of Liquid Absorption, and do not take place separating of top layer material and absorber, and has anti-leak of liquid performance.Embodiment 11
It is 19g/m that super-absorbent polymer (A-1) (at its surface portion, crosslinked sodium polyacrylate granule has higher crosslink density) is dispersed in Unit Weight
2Absorption paper on, the formation Unit Weight is 150g/m
2First absorbed layer, the normal saline absorbability that wherein said super-absorbent polymer is measured according to the centrifuge dehydration method is 29g/g, liquid is 12sec by the time.
The fabric that is formed by the homogeneous mixture of the super-absorbent polymer (B-1) of the refined pulp fiber of 100 weight portions and 50 weight portions is laid on first absorbed layer, and the formation Unit Weight is 150g/m
2Second absorbed layer, wherein, the normal saline absorbance of super-absorbent polymer herein is 6.5g/30sec/0.3g.Super-absorbent polymer (A-1) is 75: 25 with the weight ratio of super-absorbent polymer (B-1).Be 19g/m with Unit Weight again
2Absorption paper be laid on second absorbed layer, obtain absorber as shown in Figure 6.
With non-woven fabrics (Unit Weight: 25g/m
2) be placed on the first absorbed layer side of absorber as the top layer material, this non-woven fabrics is made by core/sheath type conjugate fiber, and conjugate fiber comprises that fibre diameter was 3 dawn as the polypropylene of core with as the polyethylene of sheath, blocking length is 51mm, and is hydrophilic.On the second absorbed layer side, place polyethylene sheets as backsheet, to obtain disposable diaper as shown in Figure 1.
According to following method of testing, the water absorbability of gained absorber and disposable diaper can and be leaked than testing.Gained the results are shown in Table 3.The evaluation and test of absorbent properties:
Absorber is cut into the sample of 20cm * 20cm size, the normal saline of once toppling over 50ml then thereon.Liquid fast Absorption based on following standard evaluation and test absorber.Repeat to topple over normal saline (50ml), reach capacity until Liquid Absorption.Result in the table 3 is the result who absorbs and further absorb for the first time.
A... liquid is not stayed on the surface of sample by fast Absorption
B... have a little liquid to stay on the surface, and liquid can flow from the teeth outwards
C... liquid is slowly absorbed, and the leakage ratio that flows from the teeth outwards:
Carry out the investigation of relevant leakage of urine to 10 common wearers, obtain testing the leakage ratio of disposable diaper according to following equation (III):
Leakage is than (%)=(the diaper quantity that leakage is arranged)/(total quantity of used diaper) * 100 (III) embodiment 12
Make absorber and disposable diaper according to the method identical with embodiment 11, difference is: the Unit Weight of first absorbed layer is changed to 75g/m
2, and the amount of super-absorbent polymer (B-1) increased to 100 weight portions, be increased to 50: 50 with weight ratio super-absorbent polymer (A-1)/super-absorbent polymer (B-1).
According to the method identical the absorber of gained and the water absorbability of disposable diaper can and be leaked than evaluating and testing with embodiment 11.Gained the results are shown in Table 3.Embodiment 13
According to the absorber of method manufacturing as shown in Figure 9 the structure identical and the disposable diaper of structure as shown in Figure 1, but following difference is arranged with embodiment 11.
With the normal saline absorbance is that to be dispersed in Unit Weight be 50g/m for the super-absorbent polymer (B-2) of 10g/30sec/0.3g
2Dry method paper pulp non-woven fabrics on, obtaining Unit Weight is 50g/m
2, form the absorption ply of paper and second absorbed layer thus.
Then, with non-woven fabrics (Unit Weight: 22g/m
2) be placed on second absorbed layer of absorber, to form the fiber base bed of material, this non-woven fabrics is made by core/sheath type conjugate fiber, conjugate fiber comprises as the polyethylene terephthalate of core with as the polyethylene of sheath, fibre diameter was 2 dawn, and blocking length is 51mm, and is hydrophilic.Moreover, the super-absorbent polymer (A-1) identical with embodiment 11 is placed on the fiber base bed of material, the formation Unit Weight is 150g/m
2Super-absorbent polymer (A-1) is 75: 25 with the weight ratio of super-absorbent polymer (B-2).
According to the method identical the absorber of gained and the water absorbability of disposable diaper can and be leaked than evaluating and testing with embodiment 11.Gained the results are shown in Table 3.Comparative Examples 5
Make absorber and disposable diaper according to the method identical, but following difference is arranged with embodiment 11.
It is 19g/m that the fabric that will be made by the homogeneous mixture of the refined pulp fiber of 100 weight portions and the super-absorbent polymer (A-1) of 170 weight portions (is the cross-linked sodium polyacrylate granule of high crosslink density at its surface portion) is laid in Unit Weight
2Absorption paper on, the normal saline absorbability that this super-absorbent polymer (A-1) is measured according to centrifugal separation is that 29g/g, its liquid are 12sec by the time, then further on fabric the lamination Unit Weight be 19g/m
2Absorption paper.
According to the method identical the absorber of gained and the water absorbability of disposable diaper can and be leaked than evaluating and testing with embodiment 11.Gained the results are shown in Table 3.Comparative Examples 6
Make absorber and disposable diaper according to the method identical, but its difference is: be super-absorbent polymer (B-1) the replacement super-absorbent polymer (A-1) of 6.5g/30sec/0.3g with the normal saline absorbance with Comparative Examples 5.
According to the method identical the absorber of gained and the water absorbability of disposable diaper can and be leaked than evaluating and testing with embodiment 11.Gained the results are shown in Table 3.Comparative Examples 7
Make absorber and disposable diaper according to the method identical, but following difference is arranged with embodiment 11.
Will be by the refined pulp fiber of 100 weight portions, it is 19g/m that the fabric that the homogeneous mixture of the super-absorbent polymer (B-1) of super-absorbent polymer of 150 weight portions (A-1) and 50 weight portions makes is laid in Unit Weight
2Absorption paper on, be 300g/m to obtain Unit Weight
2(super-absorbent polymer (A-1) is 75: 25 with the weight ratio of super-absorbent polymer (B-1)).
According to the method identical the absorber of gained and the water absorbability of disposable diaper can and be leaked than evaluating and testing with embodiment 11.Gained the results are shown in Table 3.
Table 3
| Absorb for the first time | Further absorb | Leakage is than (%) | ||
| Embodiment | ????11 | ????A | ????A | ????1.2 |
| ????12 | ????A | ????A | ????1.6 | |
| ????13 | ????A | ????A | ????1.5 | |
| Comparative Examples | ????5 | ????C | ????A | ????5.3 |
| ????6 | ????A | ????C | ????7.7 | |
| ????7 | ????A | ????B | ????4.4 | |
Claims (15)
1, a kind of absorbent commodity, it has liquid permeability top layer material, non-liquid permeability backsheet and is embedded in liquid-keeping absorber between them, wherein, described absorber meets the following conditions (1), and is included in super-absorbent polymer in the described absorber meet the following conditions (2) and (3):
(1) described absorber mainly comprises fiber base material and super-absorbent polymer, and with total restatement of described absorber, the ratio of described super-absorbent polymer is for being no less than 45 weight %,
(2) according to the centrifuge dehydration method, the normal saline absorbability of described super-absorbent polymer is for being no less than 25g/g,
(3) liquid of described super-absorbent polymer is no more than 20 seconds by the time, and this measures according to following method: with the described super-absorbent polymer of 0.5g put into be equipped with normal saline, cross-sectional area is 4.91cm
2In the cylinder of (internal diameter is 25mm φ),, after the super-absorbent polymer of swelling sinks, measure the 50ml normal saline then by the required time of described super-absorbent polymer so that make described super-absorbent polymer swelling until saturated with normal saline.
2, absorbent commodity as claimed in claim 1, wherein, the normal saline absorbability of described super-absorbent polymer is 25-65g/g.
3, absorbent commodity as claimed in claim 1, wherein, described absorber comprises two or more layer, at least one layer comprises described fiber base material, and another layer comprises the mixture of described super-absorbent polymer or described super-absorbent polymer and described fiber base material at least, and these layers are stacked alternately together mutually.
4, absorbent commodity as claimed in claim 1, wherein, described absorber comprises three layers, and one of them layer comprises the mixture of described super-absorbent polymer or described super-absorbent polymer and described fiber base material, and this layer be clipped in two comprise identical or different fiber base material the layer among.
5, absorbent commodity as claimed in claim 3, wherein, described absorber has the one or more layers that comprises the fiber base material, and total normal saline saturated absorption of this layer is not less than 0.1g/cm
2
6, absorbent commodity as claimed in claim 4, wherein, described two layers comprise total normal saline saturated absorption and are not less than 0.1g/cm
2Described fiber base material.
7, as the absorbent commodity of claim 3 or 4, wherein, the layer that at least one is described to comprise described fiber base material is by comprising that the hydrophilic fibre sheet material makes.
8, absorbent commodity as claimed in claim 1, wherein, described top layer material comprises the thermoplastic resin fibre; With total restatement of described absorber, described absorber comprises the described super-absorbent polymer of 45-90wt% and thermoplastic resin particle or the fiber of 0.5-20wt%; And described top layer material be with described absorber in described thermoplastic resin particle or the fiber hot adhesion together.
9, absorbent commodity as claimed in claim 8, wherein, described backsheet is the non-liquid permeability sheet material that contains thermoplastic resin, and described backsheet be with described absorber in described thermoplastic resin particle or the fiber hot adhesion together.
10, absorbent commodity as claimed in claim 8, wherein, described backsheet is to contain the microperforated sheet that the sheet material of vistanex and filler obtains by uniaxial tension at least.
11, a kind of absorbent commodity, it has liquid permeability top layer material, non-liquid permeability backsheet and is embedded in liquid-keeping absorber between them, wherein, described absorber has first absorbed layer and second absorbed layer, first absorbed layer comprises the super-absorbent polymer (A) that satisfies above-mentioned condition (3), and second absorbed layer comprises the super-absorbent polymer (B) of meet the following conditions (4); Described super-absorbent polymer (A) and described super-absorbent polymer (B) exist in the mode that can not mix; And described first absorbed layer is arranged near described top layer material one side, and described second absorbed layer is arranged near described backsheet one side:
(4) the normal saline absorbance of described super-absorbent polymer (B) is no less than 5g/30sec/0.3g, and this value is held wettability (DW) method according to need and recorded.
12, as the absorbent commodity of claim 11, wherein, described super-absorbent polymer (A) and weight ratio (B) are 90-30: 10-70.
13, as the absorbent commodity of claim 11, wherein, in described first absorbed layer and described second absorbed layer at least one by described super-absorbent polymer (A) or (B) and the mixture of hydrophilic fibre base material form.
14, as the absorbent commodity of claim 11, wherein, described first absorbed layer and described second absorbed layer separate lay by the fiber base bed of material, and this fiber base bed of material is arranged among the above-mentioned absorbed layer, and contains the fiber base material.
15, as the absorbent commodity of claim 11, wherein, with total restatement of described absorber, the gross weight of described super-absorbent polymer (A) and described super-absorbent polymer (B) is not less than 45wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97103775 CN1163100A (en) | 1996-04-12 | 1997-04-14 | Absorptive articles |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP91507/96 | 1996-04-12 | ||
| JP276697/96 | 1996-10-18 | ||
| JP279239/96 | 1996-10-22 | ||
| CN 97103775 CN1163100A (en) | 1996-04-12 | 1997-04-14 | Absorptive articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1163100A true CN1163100A (en) | 1997-10-29 |
Family
ID=5166876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97103775 Pending CN1163100A (en) | 1996-04-12 | 1997-04-14 | Absorptive articles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1163100A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170848A (en) * | 2008-08-06 | 2011-08-31 | 巴斯夫欧洲公司 | Fluid-absorbent articles |
| CN103976824A (en) * | 2014-04-28 | 2014-08-13 | 浙江珍琦护理用品有限公司 | Fully-degradable environment-friendly paper diaper |
| WO2019165590A1 (en) * | 2018-02-28 | 2019-09-06 | Kimberly-Clark (China) Co., Ltd. | Multi-layer absorbent cores and methods of manufacture |
| CN111565690A (en) * | 2017-12-29 | 2020-08-21 | 花王株式会社 | Absorbent body and absorbent article |
| CN112438838A (en) * | 2019-08-27 | 2021-03-05 | 福建省奇邦新型材料有限公司 | Sanitary water-absorbing core and preparation method thereof |
-
1997
- 1997-04-14 CN CN 97103775 patent/CN1163100A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170848A (en) * | 2008-08-06 | 2011-08-31 | 巴斯夫欧洲公司 | Fluid-absorbent articles |
| CN103976824A (en) * | 2014-04-28 | 2014-08-13 | 浙江珍琦护理用品有限公司 | Fully-degradable environment-friendly paper diaper |
| CN111565690A (en) * | 2017-12-29 | 2020-08-21 | 花王株式会社 | Absorbent body and absorbent article |
| WO2019165590A1 (en) * | 2018-02-28 | 2019-09-06 | Kimberly-Clark (China) Co., Ltd. | Multi-layer absorbent cores and methods of manufacture |
| CN111801075A (en) * | 2018-02-28 | 2020-10-20 | 金佰利（中国）有限公司 | Multi-layer absorbent core and method of making same |
| KR20200126385A (en) | 2018-02-28 | 2020-11-06 | 킴벌리-클라크 월드와이드, 인크. | Multilayer absorbent core and manufacturing method |
| GB2584977A (en) * | 2018-02-28 | 2020-12-23 | Kimberly Clark Co | Multi-layer absorbent cores and methods of manufacture |
| US20200405548A1 (en) * | 2018-02-28 | 2020-12-31 | Kimberly-Clark (China) Co., Ltd. | Multi-layer absorbent cores and methods of manufacture |
| GB2584977B (en) * | 2018-02-28 | 2022-06-01 | Kimberly Clark Co | Multi-layer absorbent cores and methods of manufacture |
| KR102552255B1 (en) * | 2018-02-28 | 2023-07-06 | 킴벌리-클라크 월드와이드, 인크. | Multilayer absorbent core and manufacturing method |
| AU2018411085B2 (en) * | 2018-02-28 | 2024-05-09 | Kimberly-Clark Worldwide, Inc. | Multi-layer absorbent cores and methods of manufacture |
| CN112438838A (en) * | 2019-08-27 | 2021-03-05 | 福建省奇邦新型材料有限公司 | Sanitary water-absorbing core and preparation method thereof |
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