CN1086989A

CN1086989A - Absorbent item with improved longitudinal fluid movement performance

Info

Publication number: CN1086989A
Application number: CN93119084A
Authority: CN
Inventors: C·W·查佩尔; L·M·海恩斯; J·L·哈蒙斯; T·L·约翰逊
Original assignee: Procter and Gamble Co
Current assignee: Procter and Gamble Co
Priority date: 1992-09-10
Filing date: 1993-09-10
Publication date: 1994-05-25
Also published as: AU5102093A; WO1994005243A2; USH1511H; MX9305584A

Abstract

The invention provides a kind of absorbent item, particularly include a sanitary towel that is positioned at the fluid stream adjustor between top flat and the absorbent cores.In use, the fluid that is deposited on the top flat spontaneously longitudinally moved by means of fluid stream adjustor before arriving absorbent cores.Fluid stream adjustor longitudinally moves by making most of fluid, makes the utilization of absorbent cores more effective.

Description

Absorbent item with improved longitudinal fluid movement performance

The present invention relates to absorbent item, particularly relate to for example various sanitary towels of sanpro.These absorbent items are particularly suitable for absorbing bodily excretory various fluids, particularly menstruation, and they can be cosily match with wearer's health.

At present, the structure that has various fluidic disposable absorbent items of discharging for collection of bodily to know.Commercial absorbent item comprises diaper, adult-incontinence articles, menopad and ligature etc.This disposable product is used for accepting, absorbs and preserved fluidic functor and form by some.These absorbent items generally include an absorbing material core of mainly being made up of fibrous cellulose.These articles for use generally include the top flat of a permeate fluid, an absorbent cores and a fluid-tight egative film.

To menopad, woman look forward to for a long time having and a kind ofly have high comfort and matching property and have high preservation fluid capacity and do not stain the absorbent item of characteristic as far as possible.Above every among, fluid leaks into underwear and is considered to receptible anything but from pad.

Though a lot of improvement have been carried out in the material and structure two aspects of sanitary towel at present, the improvement of the performance of sanitary towel are still being carried out continuing sincere landing.Yet leak for restriction, particularly, just can not satisfy the desired requirement of user as not taking into account conformability and comfort along the inner side leakage of thigh.

The leakage of sanitary towel is considered to be in usually in body flows out the position fluid undue concentration of menstruation and the result who directly contacts with the sanitary towel surface.At this lodgment, the absorbing material of sanitary towel reaches the super full state that closes very soon.Menstruation goes out from this upper edge, position Radial Flow and from two lower limb side leakages near the wearer.Its result usually is that menstruation adheres on the health and the underwear of making dirty.The scheme that restriction is leaked comprises: adopt fine and close marginal texture to stop fluid (authorizing No. 4820295 patents of the U.S. of people such as Chapas on April 11st, 1989); Surround the barrier layer (No. 4666439 patents of United States Patent (USP) that on May 19th, 1987 was authorized people such as Williams) of absorbent item; And the side edge formations (authorizing No. 4701177 patents of the U.S. of people such as Ellis on October 10th, 1987) of " wing is arranged " of sealing around underwear.

Regrettably, the closely knit excessively cross section of sanitary towel causes discomfort in use.Some user are lost interest in to " wing is arranged " product, and other user are dissatisfied to the product on band barrier layer.But, because most of sanitary towels is to keep suitable dry status and be not utilized greatly, now determined fluid can be prevented that from the device in the zone that is not fully utilized of lodgment guiding absorbent item over-saturation from also can significantly reduce or limit leakage by providing a kind of.

Except that the underwear of making dirty, the modern sanitary towel and the user of other similar articles for use expect that the surface that the surface energy of these sanitary towels has a sanitary towel of common bafta that a ratio had or non-woven material more cleans, much cleaner and dry status more.Therefore, modern sanitary towel, moisture absorption and incontinence device generally include to making fluid promptly by last slice and flow into for the top flat in the absorbent cores of the lower floor that stores usefulness.The surface of the fast more and abundant more absorbent item of this motion is just dry more and clean more as can expecting.

In a word, the present invention can not only make above-mentioned fluid carry out desirable directed movement, such fluid directed movement has improved the utilization of the absorbability of the integral body of absorbent item and has reduced side leakage, the means that fluid is extracted out by top flat also are provided, thereby have protected desired dry hygienic advantages when having levied use.

In addition, adopt the sanitary towel of the technology that the present invention embodied to rely on for example high density absorbent core region together, compare to have with the sanitary towel that reaches the purpose that makes fluid motion and feel more comfortable and cooperate more good performance.It should also be noted that this technology can utilize the densification that is in softish, flexible a, low-density and the comfortable pad but uncomfortable absorbent cores obtains fluidic directed movement and control characteristic.

The present invention is suitable for some absorbent items in a desirable embodiment, preferably a kind of sanitary towel or pantiliner, but also comprise diaper, adult-incontinence underwear, ligature etc.This absorbent item has one vertically, one laterally and Z to.This absorbent cores comprises the top flat and an egative film that links to each other with top flat of a transflective liquid.An absorbent cores is positioned between this top flat and the egative film, and absorbent cores has the lower surface that a upper surface and that is pasting top flat is pasting egative film.A fluid stream demodulator is positioned between top flat and the absorbent cores.This fluid flow conditioner when having promoted fluidic lengthwise movement, controlled fluidic laterally and Z to motion.

In a comparatively desirable embodiment, this fluid stream demodulator comprises that one second top flat and some have the fiber of surperficial capillary channel, and second top flat preferably is configured on some pleats of stretching along the vertical edge that is parallel to absorbent item basically.Fiber with surperficial capillary channel forms yam-like, and is positioned in those pleats of second top flat, and the fiber yarn that is positioned in those pleats of second top flat is twisted.

In another desirable embodiment, the fiber with outer surface capillary channel forms the non-woven fleece shape.Cover on second top flat by having the non-woven fleece that the outer surface capillary channel fiber forms.Orientation with non-woven fleece outer surface capillary channel fiber preferably makes their passage be located substantially on the direction that vertically parallels with absorbent item.Fiber with outer surface capillary channel is preferably hydrophilic.The cross section of these capillary channel fibers preferably has " H " shape.

Though claims of this description ending have been pointed out the present invention particularly and in all seriousness to the present invention proposes claim,, can more be expressly understood the present invention from following description taken in conjunction with the accompanying drawings.Identical in the accompanying drawings reference number is represented components identical.

Fig. 1 is the top view of a desirable sanitary towel of the present invention, wherein for the structure of seeing sanitary towel clearly with its partly cut-away;

Fig. 2 is the cutaway view of the sanitary towel that cuts open of the line 2-2 along Fig. 1;

Fig. 3 is one and has a flat supporting part (4), the drawing in side sectional elevation of the symmetrical H shape capillary channel fiber of the height (6) of width between two walls (5) and wall;

Fig. 4 is a drawing in side sectional elevation with C shape capillary channel fiber of the relevant projection of several stable same capillary channels;

Fig. 5 is the drawing in side sectional elevation of a multistage H shape capillary channel fiber;

Fig. 6 is the drawing in side sectional elevation of a Multistage U shape capillary channel fiber;

Fig. 7 A is a drawing in side sectional elevation that is in the H shape capillary channel fiber (though not being that optimized, such fiber can be used at this) of part collapsed mode;

Fig. 7 B is the drawing in side sectional elevation of an expansible capillary channel fiber;

Fig. 7 C is the drawing in side sectional elevation of a capillary channel fiber that all subsides; (such fiber can not be used at this);

Fig. 8 is the section microphotograph of a sanitary towel, and this cross sectional photograph demonstrates the tight contact between a bottom of the film topsheet of a formation and capillary channel fiber and enters into the bossing of the capillary channel fiber in top flat hole;

Fig. 9 is the top view of another embodiment of sanitary towel of the present invention, wherein, and in order more to clearly illustrate the structure of sanitary towel, with its partly cut-away;

Figure 10 is the cross-sectional view of the sanitary towel that cuts open of the line 10-10 along Fig. 9;

" absorbent item " speech is a kind of device that absorbs and preserve the human body ejection at this, and be meant especially pasting or near wearer's health so that absorb and hold the various excremental device that from human body, excretes." absorbent item " speech is to be used for representing diaper, menopad, sanitary towel, pantiliner, incontinence pad etc." with after promptly abandon " a speech be to be used for describing those absorbent items of not planning to wash or being reclaimed and reusing with additive method as a kind of absorbent item (promptly once using the back just to plan they are being abandoned, preferably reclaiming and make compost or handle) at this with other processing mode free from environmental pollution." assembling " absorbent item is meant by one parts and fits together the absorbent item that constitutes a collaborative integral body, need not be divided into the parts of separately handling of a similar independent fixture and a pad like this to them.

An embodiment of the disposable absorbent item of an assembling of the present invention is menopad, a sanitary towel as shown in Figure 1." sanitary towel " speech is meant at this and is through near perineal region by the woman, generally be through the absorbent item of region pudendalis, they are intended to be used to absorb and hold from the menstrual fluid of wearer's body discharge and other vagina Excreta (for example blood, menstruation and urine).Part is positioned at wearer's the inside of cloudy vestibule and epipharynx device that part is positioned at cloudy vestibule outside also within the scope of the invention." perineum " speech is meant woman's visible external genitalia district at this.But, should be noted that the present invention also is suitable for other women sanitary articles or menopad panty-liners for example, or other absorbent item, for example incontinence pad.

Sanitary towel has two faces, the surface of a body contact or " surface " 20a and a underwear surface 20b.Sanitary towel 20 shown in Figure 1 looks from the surperficial 20a direction of its body contact.Contact human body surface 20a is intended to wear near wearer's body.The underwear surface 20b(of sanitary towel 20 sees Fig. 2) in an opposite side, when sanitary towel was through on the health, underwear surface 20b was pasting wearer's underwear and is fixing.

There are two centrages in sanitary towel, a longitudinal centre line " l " and a cross central line " i "." longitudinally " speech is meant a line on the plane of sanitary towel 20 at this, axis or direction, the same vertical plane phase alignment of this line (promptly approximate parallel) when this vertical plane is through on the health in sanitary towel is divided into wearer's split of standing a left side and right two halves.Speech " laterally " or " horizontal " they are interchangeable at this, are meant a line on the plane of sanitary towel, axis or direction, and this line is big to above-mentioned vertically vertical.

Fig. 1 is the top view under the offset flat shape attitude of sanitary towel 20 of the present invention, for the structure that clearly shows sanitary towel 20 with its partly cut-away, sanitary towel towards or that side 20a of contact wearer towards the observer.As shown in Figure 1, sanitary towel 20 preferably includes the top flat 22 of a transflective liquid, an absorbent cores 24 and a fluid that is positioned between top flat 22 and the absorbent cores 24 that is positioned between top flat 22 and the top flat 23 with top flat 22 23, one continuous of liquid-tight top flats flows demodulator 21.

Fig. 1 also demonstrates sanitary towel 20 border 30, and it is limited by the external margin of sanitary towel 20, and longitudinal edge wherein (or " lateral margin ") is represented with 31, and end limit end (or end) is represented with 32.

Sanitary towel 20 preferably includes an optional side tongue or " aileron " 34, and they encase the crotch place of wearer's underwear.It is that the underwear that prevents the wearer is made dirty and guaranteed that sanitary towel abuts on wearer's the trousers that the effect of side tongue 34 includes, but is not limited to.

Fig. 2 is the cutaway view of the sanitary towel 20 of being got of the hatching 2-2 along Fig. 1.As can be seen in Figure 2, fluid conditioner 21 preferably includes one second top flat 27 and some fibers 25 with outer surface capillary channel.Second top flat 27 preferably includes the pleat that some bearing of trends are arranged essentially parallel to the y direction of sanitary towel 20.Those fibers 25 with outer surface capillary channel preferably are located among those pleats of second top flat 27.

Sanitary towel 20 preferably has one to be used for sanitary towel 20 is bonded to the parts 36 that are adhesively fixed on wearer's underwear.For the part that prevents to be adhesively fixed before use adhere in part beyond the crotch, discerptible release liner 37 is covered on the part 36 that is adhesively fixed.

Sanitary towel also has " Z " direction or Z axle except that having a longitudinal direction and transverse direction, the Z direction is to enter direction in the fluid storage core 24 that may provide then through top flat 22 downwards.The objective of the invention is provides a capillary siphoning gradient between the top flat 22 of sanitary towel and a lower floor (or several lower floor), thereby makes fluid finally enter its last storage layer at the top flat that the Z direction was extracted and left sanitary towel.

Fluid stream adjustor preferably is made up of second top flat that is configured on some vertical plates, be fixed with the fiber that some have outer capillary channel on these vertical plates, utilize this fluid stream adjustor can promote fluid stream flowing longitudinally, this vertically flows and has improved the overall absorption utilization rate of absorbent item.In addition, in order to limit as much as possible or even to prevent that fully fluid from leaking along the transverse edge of absorbent item, will be controlled horizontal fluid stream.Therefore, absorbent item difference with prior art, this fluid stream adjustor can make fluidic flowing have desirable flow direction, and the sanitary towel in the prior art makes fluid do unoriented flowing on X, Y, Z direction by consisted of fiber felt by interior fiber hair pore.So, with what come into one's own be: compare with the absorbing structure (they do not use and preferably include one second top flat and the fluid demodulator with the fiber that impels body fluid fiber capillary channel in the outer surface that vertically passes through) of various public technologies, absorbent item of the present invention is the mode that is different in essence according to a kind of, and the material that the benefit that is different in essence can be provided that use is different in essence plays a role.

To introduce each independent parts of sanitary towel of the present invention below in more detail.

2. the independent parts of sanitary towel

The A top flat

Top flat 22 has the stickiness soft feeling and to the wearer's skin nonirritant.In addition, top flat 22 is permeate fluid, can make fluid (for example menstruation and/or urine) see through its thickness easily.Suitable top flat 22 can be used a variety of materials manufacturing, and these materials for example can be textile material and non-woven material; The porous thermoplastic membrane that polymeric material for example is shaped, plastic film, hydroforming thermoplastic film, sponge plastics, reticulated polymer foam, net structure thermoplastic film and thermoplasticity woven scrim.The weaving and the non-woven material that are suitable for can be formed or be made up of the compositions of natural fiber and synthetic fibers by natural fiber (for example wood fiber or cotton fiber), synthetic fibers [for example polymer fiber (for example polyester fiber, polypropylene fibre or polyethylene fibre)].

A preferred top flat 22 is made up of the shaping porous membrane.The saving grace of making top flat with the porous membrane that is shaped is that they can see through the Excreta of human body, but does not absorb these Excretas, can also reduce fluidic backflow and prevent to get wet once more wearer's skin.Therefore, remain drying regime with the porous membrane surface of the shaping of Body contact, thereby reduced the probability of the health of making dirty, and the wearer is produced a kind of more comfortable sensation.Following patent document has been described the formed film that is fit to, these patents are: Decembers in 1975 were authorized the US3929135 of Thompson on the 30th, authorize the US4324246 of Mullane April 13 nineteen eighty-two, authorize people's such as Radel IS4342314 August 3 nineteen eighty-two, authorized people's such as Ahr US4463045 on July 31st, 1984, Decembers in 1986 were authorized people's such as Curro US4629643 on the 16th, and authorized the US5006394 of Baird on April 9th, 1991.Above-mentioned each piece patent document all is used as reference paper and quotes.Be used for preferred top flat 22 of the present invention and be the formed film described in above-mentioned one or more patent document, and by The Procter ﹠ Gamble Company of Cincinnati(Ohio) in sanitary towel registered trade mark be " DRI-WEAVWE ".

The body-facing surface of the top flat 22 of formed film is hydrophilic in a preferred embodiment of the present invention, and the body-facing surface of possess hydrophilic property is not fast thereby make ratio that liquid passes through top flat 22 transmission.This will reduce the mobile disengaging top flat 22 of menstrual fluid and not flow into top flat 22 and be absorbed the probability that core 24 absorbs.In a preferred embodiment, surfactant being mixed in the polymeric material of formed film top flat 22, is that 07/794745 U.S. Patent application has been described this scheme be called " have nonwoven with the absorbent item porous membrane emulsion sheet " application number in the name of on November 19th, 1991 application by people such as Aziz for example.In addition, also can make it obtain hydrophilic by the body-facing surface of top flat 22 is handled with surfactant, for example authorize the US4950264 of Osborn and authorized on April 23rd, 1991 in the US5009653 U.S. patent documents of Osborn and described this scheme on August 21st, 1991, these two pieces of patent documents are used as reference paper and quote.

The B absorbent cores

Absorbent cores 24 can be any absorption plant that can absorb or preserve liquid (for example menstruation and/or urine).As depicted in figs. 1 and 2, absorbent cores 24 has a body-facing surface, and one towards the underwear surface, lateral edges and end margin.Absorbent cores 24 can be made various sizes and shape (for example rectangle, avette, hourglass shape, Os Canitis frame shape, asymmetry etc.), and can adopt the various common material manufacture that are used for the absorption liquid of sanitary towel and other absorbing articles, for example these materials are to pulverize just slurry, and it is commonly referred to airfelt.The example of the absorbing material that other is fit to comprises wrinkling cellulose wadding, comprises the cellulose of enhanced or chemical modification or the chemical crosslinking of molten blown polymer, the chemistry of conformal thing; Capillary pipe fiber; Synthetic cellulose is shrinkage for example.Polyester fiber, peat moss floss comprises that tissue paper strip of paper used for sealing and tissue paper are stacked in interior thin paper; Absorbent foam materials, absorption sponge, super-absorbent polymer, absorption gel rubber material; Or any substitution material of these materials or any of these material compositions or mixture.

The shape of absorbent cores 24 and structure can change also that [for example absorbent cores can have the zone (for example making in the cross section of core thicker) of a thickness variable, the super absorption gradient of the hydrophilic gradient of variation, variation or than the Ji Qu that fears of low-density and low basic weight; Or can form] by one or more layered structures.Yet total absorptive capacity of absorbent cores 24 should be consistent with the absorbtivity of design and 20 concrete purposes of sanitary towel.The size of absorbent cores 24 and the absorptive capacity sanitary towel that can for example use under incontinence pad, pantiliner, the normal condition according to different purposes or the sanitary towel of spending the night etc. change in addition.

Following patent document has been described the typical structure as absorbent cores 24 of the present invention, and these patent documents are: authorize the U.S.4950264 of Osborn August 21 nineteen ninety, JIUYUE was authorized people such as Weisman on the 9th in 1986.U.S.4610678, authorized people's such as Alemany U.S.4834735 on May 30th, 1989, the U.S.5009653 and the european patent application No.0198683(that authorized Osborne on April 23rd, 1991 are applied for by The Drocter Gambe Company, on October 22nd, 1986 is open, and the invention people is people such as Duenk) above-mentioned each piece patent document all is used as reference paper and quotes.

The absorbent cores 24 of a preferred embodiment is made up of laminated construction shown in Figure 2.This laminated construction is by a super-absorbent polymer materials (or absorb gel rubber material) layer, and one or more pieces or reticulated of cross-linked cellulose fibres constitute.The cross-linked cellulosic that is fit to that is used for absorbent cores 24 is disclosed in following patent document; Decembers in 1989 were authorized people's such as Cook U.S.4888093 on the 19th, authorized people's such as Dean U.S.4822543 on April 18th, 1989, and Decembers in 1989 were authorized people's such as Schoggen U.S.4889595 on the 26th; And February 6 nineteen ninety authorize people's such as Morre U.S.4898642; Authorize people's such as Lash U.S.4935022 June 19 nineteen ninety, May in 1991 people such as disclosed Herron on the 15th the open No.0427316A of european patent application ₂With 0427317H and May in 1991 people such as disclosed Herron on the 29th European patent No.0429112A ₂, these patent documents are cited as a reference.

The cross-linked cellulose fibres material comprises a unique sheet that encases the granular layer that absorbs gel rubber material 40 in the embodiment shown in Figure 2.When this sheet is used to encase described granular layer, see that from the end it presents a kind of " C " shape configuration.This bag sheet forms a upper strata 41 and a lower floor 42.Lamination can constitute with a variety of other modes in some alternative embodiment, for example the different layers of absorbent cores lamination (rather than independent a slice) is provided the separation reticulated of cross-linked cellulose fibres material (or other absorbing material) respectively, perhaps provide extra play to different layers.

Among such absorption stamen, curl, twisting, preferably chemical enhanced and cross-linked cellulosic will be made with extra care, so as to provide can lamellar as the fiber of absorbent cores.Can be used to make the situation that curl, chemical enhanced cellulose fibre that is fit to purified, that curl, chemical enhanced cellulose fibre absorbent cores about preparation describes in detail in United States Patent (USP) U.S.4888903,4822543,4889595,4889597,4889596 and 4898642.

In the U.S.493502 patent description is arranged with the means that being used in combination and being used for making these goods that absorb gel rubber material about these fibers, these preparation methoies typically comprise uses aldehydes (for example glutaraldehyde) to make cross-linking agent.Polycarboxylic acids also can be used as cross-linking agent in addition.The means that need be appreciated that the cross-linked cellulose fibres that prepare other also are known, and these fibers can may be suboptimums though the performance of its absorption fluids is compared with above-mentioned fiber using also.Application for the fiber of other kind can be with reference to those files of quoting as proof in U.S.4898642 and the PCTU.S.8901581 patent application.The above-mentioned scheme of GPRS is carried out polish to the cellulose fibre that curls, and just can obtain to be used for preparing the fibrous material of use in the desirable absorbent cores of technology of the present invention.

The C egative film

Egative film 23 is impenetrable liquid (for example menstruation and/or a urine), and preferably makes of an elastic film, though also can adopt other liquid-tight flexible material to make." flexible " speech is meant the submissive performance that material has and is easy to basically the performance that shape and profile phase with human body cooperate at this.The effect of egative film 23 is to prevent that the Excreta that is absorbed and is included in the absorbent cores 24 from soaking 20 contacted articles for use, for example underwear, pyjamas and underwear etc. with sanitary towel.Therefore egative film 23 can be a material weaving or nonwoven, and polymer thin film is polyethylene or polyacrylic thermoplastic film for example, or composite for example scribbles the non-woven material of thin film.Egative film 23 a preferably thickness is about 0.012mm(0.5 Mill) to about 0.051mm(20. Mill) polyethylene film, typical polyethylene film is by Clopay Corporation of Cincinnati(Ohio) make according to the P18-0401 technical conditions, and by Ethyl Corporation Visqueen Division, of Terre Haute(Indiana) make according to the XP-39385 technical conditions.Egative film 23 preferably through embossing and/or matt processed so that obtain an outward appearance that resembles fabric.In addition, egative film 23 can make steam overflow from absorbent cores 24 (can be easy to suck) but still can stop Excreta to pass through egative film 23 simultaneously.

D. fluid flows adjustor

Fluid stream adjustor 21 can be can collect arbitrarily and the parts of distributing fluids (for example menstruation and/or urine).Making fluid stream adjustor 21 is important with the suitable balance of the mobile maintenance of Z direction longitudinally.Fluid stream adjustor must make fluid go up substantially along vertically flowing at fluid permeability before following absorbent cores.By fluid is gone up substantially along vertically flowing, fluid stream adjustor has more effectively utilized absorbent cores.Fluid stream adjustor preferably has in the outside fiber capillary channel fiber 25 by one second top flat 27 and some and forms.

(i) second top flat

Second top flat 27 can be that any one can be collected and the parts of dispense liquid (for example menstruation and/or urine).As shown in Figure 2, second top flat 27 has the surface of a contact human body, surface, lateral edges and the end margin of a contact underwear.In addition, second top flat, 27 wrinkle are become a lot of pleats, these pleats are basically along the longitudinal extension that is parallel to sanitary towel 20.Second top flat 27 helps to distribute the fluid that has sunk on the top flat 22 and it is flowed.Material that second top flat 27 can wrinkle be shaped by one deck and the material with fiber inner capillary tube be formed, thus make fluid from top flat thoroughly on absorbent cores.

Second top flat 27 is when preferably a slice has from about 0.025g/ ²During to about 0.045g ²Basic weight and have from about 0.06 to 0.11g/cm ³The textile material of density.These typical fabrics are by Fort.Howard Corpration(Green Bay, Wisconsin) make.

(ii) capillary channel fiber

Sanitary towel 20 preferably includes within some vertical pleats 26 that are positioned at second top flat 27 and the big extremely capillary channel fiber 25 between second top flat, 27 same first top flats 22.Capillary channel fiber 25 is to have therein, preferably the fiber of the passage that forms on its outer surface.Fig. 3 to 7 shows the capillary channel fiber of some types.The capillary channel fiber that is fit to has description in following patent application: these patents are the U.S. Patent application No.07/734404 that submitted on July 23rd, 1991, propose with people such as Thompson name; U.S. Patent application No.734392 that proposes with people's such as Thompson name and the U.S. Patent application No.07/734405 that proposes with people's such as Buenger name.These patent applications can be collected the reference as " capillary channel fiber " patent application.The capillary channel fiber that is fit to was also described in the disclosed european patent application 0391814 in October 10 nineteen ninety.

Though the present invention can use various capillary channel fibers, some comparatively desirable performances of the capillary channel fiber 25 that is impregnated in the absorbent item of the present invention have been discussed in following description.

(a) fiber form

As mentioned above, capillary channel fiber has capillary channel 29 on its outer surface.The shape of capillary channel fiber 25 is comparatively preferably crooked, more preferably curls (that is to say that these fiber right and wrong are rectilinear).Capillary channel fiber 25 preferably is (or wrinkle is held together) of curling basically.This makes capillary channel fiber have higher top layer and makes one to have increased elasticity for the fiber of determined number.By increasing the top layer of individual fibers, make the pad of the whole top layer of making by this fiber thicker and soft.This will allow to make the pad of low-density high top layer, suppose these independent fibers itself not too slightly or these high top layer pads of too not hard words not only as snug as a bug in a rug, conveyance fluid effectively.

, the non-rectilinear capillary channel fiber of the best here should not kinked, and can kink the system point that the position forms some capillary channels at each when capillary channel fiber is kinked.Certainly, this disturbs the flow dynamics along capillary channel.

In addition, utilize the non-rectilinear capillary channel fiber to also have an important advantage.As shown in Figure 8, at least in fact the small part of capillary channel fiber is reached in some pore 35 of top flat 22 of absorbent item described here.When utilizing the capillary channel fiber that curls to prepare the capillary channel pad, relatively be easy to generate these projectioies.Make some ends in capillary channel fiber and/or frizz find one they enter the probability of energy circuit in hole of top sheet materials than the collinear capillary channel of main employing in the past and big.Can capillary channel fiber be curled with several different methods, these methods include, but is not limited to: when deviate from from shaping mould when fiber (1), by the big slightly strong opposite side (or making a side cool off sooner than opposite side conversely) of fiber one side heating is optionally carried out thermal quenching to these fibers; (2), then lax by stretching, or under certain tension force, make fiber can use synthetic polymer by then lax mode around an edge of acute angle, polyester for example, the fiber crimp of making; (3) by immersing in the methanol.In a desirable mode, these fiber major parts are spiral helicine, no matter how to make capillary channel fiber shrinkage or curling by other means, can unclog and readjust them as required then, so that form a fiber module.

Best crimp amplitude is in the scope of about 0.1mm to about 5mm, and the generally curling frequency is that fiber is about 1 and is about 10 when per approximately when per.Has the fiber that about 0.5mm amplitude peace treaty is 6 pleats when per even the fiber with big capillary channel that distributes for higher Denier also shows good flexibility.

(b) fibre structure and surface characteristic

This used capillary channel fiber 25 can by any can usefulness, the not polymer manufacturing of bulking when moistening.Polymer is polyethylene, polypropylene, polyester (the best) and other materials similar for example, as long as they are spinnable so that make its molding have the outer surface capillary channel, here are exactly useful.These polymer are fusible extruding, and this is easily.Usually will be at this capillary channel fiber by a kind of fused mass manufacturing of synthetic polyethylene terephthalate polymer, the intrinsic viscosity of this fused mass (" IV ") from about 0.6 to about 0.9.(IV is a technical term, and can determine with known method, sees for example the 8th hurdle of United States Patent (USP) 4829761).The IV of the fused mass of polymer keeps the ability of capillary channel fiber wall shape relevant with polymer, and relevant with the mean molecule quantity of polymer.It is suitable for example adopting intrinsic viscosity to be about 0.7 polyester at this, is that 0.9 polymer will be more desirable but utilize intrinsic viscosity, because this will make the wall of seal character thinner, breaks under working pressure preventing yet still have enough intensity.

The fiber number of capillary channel fiber 25 is preferably about 10 to about 22 Denier.Certainly be understood that used fiber number is to be determined by formulator, every fine yarn denier is that about 25 to about 35 scope is fine undoubtedly.

It is about 2.0 that the depth-to-width ratio of capillary channel fiber is preferably, and under the qualifications except technology, also should consider economic factor as mentioned above, adopts about 1.3 depth/width ratio usually.Satisfy about 46 μ of wall thickness at the typical and capillary channel fiber that is easy to produce of this application, and about 33 μ of the distance between wall, the thickness of wall itself is generally about 3-15 μ.Though these sizes are to allow to change, can reach its its intended purposes well by the capillary channel polyester manufacturing and that have these characteristics.These fibers can utilize general process equipment manufacturing, and under the pressure of the sort of type that health device (particularly sanitary towel and pantiliner) is run into, and capillary channel wall is subsided or be deployed into the capillary degree of loss.

Capillary channel 29 can have different shape.In the certain products purposes, some shape can provide specific advantage.For example can use the U-shaped, H shape, the capillary channel 25 C shape and V-type that have suspension steady component thereon.Can repeat basic shape (seeing figure) in addition, or even can bifurcated so that produce the fiber that contains the thin passage of hirsutism, but should be noted that if adopt more than about three repetition shape, consider in fiber, to increase some strengthening parts.Many " U " fiber among Fig. 6 provides an additional advantage-because aspectant contact has additional capillarity and be easy to curl.

Manufacture method at such capillary channel fiber 25 of this employing has description in following patent application document: the invention people is the patent application that continues of the EPO application 391814 of submitting people's such as Phillips Jones 23 days July in 1991 and common No. 07/7356261 part of the U.S. in examination, and name is called " fiber of transmitting fluid automatically " (Eastman Chemical Campany); The name of submitting on July 23rd, 1992 is called the U.S. Patent application (inventor Phillips etc.) in common examination still " hole of fusulus and have the long fibre of stabilizing leg " No. 07/91817; And the name that submit February 20 nineteen ninety to be called " open capillary channel structure is made the improvement technology of capillary channel structure and the tension and compression mould of use thereof " application number be 07/482466 the patent application in examination still (inventor Thompson and Krautter).

Though be used to make the polymer of capillary channel fiber itself and be (or do not inhale urine or contain for example menstruation of fluid of blood) of not absorbing water, these fibers itself are preferably hydrophilic.Because most of synthetic polymers are hydrophobic, so will carry out surface treatment so that it obtains hydrophilicity to the capillary channel fiber of usefulness herein.

The surface treatment of polymer fiber is included in the technology of knowing in the drawing of fiber document.These technologies generally include with hydrophilic reagent particularly handles fiber surface with surfactant.[can measure according to a conventional method by the hydrophiling that aqueous fluid makes fiber obtain wettable performance, for example utilize variable feeler measurement method.Contact angle generally shows it is a water-wetted surface less than 90 ℃.Can measure hydrophilicity with a kind of CAHN surface tension analyzer (SFA), also can be with various other known instruments.] exemplary surfactants that is used in these technologies comprises the various medium-sized non-ionic and anionic surfactants that cleaning effectiveness is arranged in known cleaning documents and materials.Hydrophiling reagent comprises for example polyethylene glycol monolaurate (PEGOSPERSE 200ML for example of wetting agent, from LonZa, Inc.Williamsport, a kind of Cithrol 2ML that PA.USA buys), and the oleoyl alcohols of ethoxylation is (for example from Croda Inc.New York, New York, the VoLpo-3 that USA buys).Other kind hydrophilic reagent and technology also can adopt, and they are included in fiber and the field of textiles to increasing wettability, improve technology that those professionals of the separating property of dirt know etc.Can each stage before use hydrophiling reagent be dosed in the polymer, certainly, preferably before capillary channel controls to its final size, dose.For example can be with hydrophiling reagent in fusion or be mixed into and then carry out in the polymer compound dosing in the polymer in advance before the fusion.Also the hydrophiling reagent of dosing can be followed after being shaped, to be coated onto on the polymer and (, follow in the technologies such as moistening or dried stretching), preferably before fiber drawing becomes minor diameter, add after the drawing finishing die is deviate from for example in fusion.Certainly, because absorbent item is to contact with the sensitive part of industry with human body herein, so it is preferably avirulent and non-irritating to people's skin to be used for the surfactant on hydrophiling capillary channel fiber surface.The various surface activating process that are used for hydrophiling capillary channel fiber embodiment in the back will be described.Be used to make other methods of fiber surface hydrophiling to comprise and make this surface stand the ionizing radiation, for example the advantage with plasma, these methods is not have surfactant to remain on the fiber surface.Which kind of method no matter, its total target are will guarantee to have by its fluid that will transmit performance of moistening spontaneously at this used capillary channel fiber.

(c) different shape of capillary channel fiber

Capillary channel fiber 25 preferably becomes the shape of the yarn shown in Fig. 1 and 2.The yarn of capillary fiber 25 is made up of independent capillary fiber 25, and capillary fiber 25 has produced curling after stretching.A small amount of twisting can make and have cohesion between the fiber to capillary channel fiber.

Be used in the cross section that the capillary channel fiber 25 in the yarn preferably has a H shape as shown in Figure 3.Dark about 46 μ of the wall of H type capillary channel fiber 25, the width between two walls is 33 μ, about 16 Denier of the fiber number of fiber.About 657 Denier of the fiber number of capillary channel fiber yarn.Preferably fiber is become spiral type, fiber about 8.3 when the about 0.15mm of its amplitude, curling frequency were per.

In another embodiment, capillary channel fiber 25 can become the form of a nonwoven.This non-woven fleece preferably one by the fibrous heat bonding of volume by 2 durations of curl, become blocky with become acicular sheet stock.The method of other formation non-woven fleece comprises combing, random processing, and antiseized, acupuncture perforation, it is curling etc. that deep fat is exerted pressure.Fiber has the fiber number of 17 Denier of every fiber.The basic weight of final non-woven fleece is preferably about 11.6OZ/Ya ²A kind of suitable non-woven fleece of being made up of capillary channel fiber has description in the name that JIUYUE 10 in 1992 is submitted is called U.S. Patent application people such as () inventor Thoupson of " structure that fluid receives transmission and preserves ".

E. the fluid at each interlayer flows

Fluid at first impacts on the egative film 22 of sanitary towel 20, flows adjustor 21 through egative film 22 towards fluid then, and fluid stream adjustor 21 preferably is made up of second top flat 27 and capillary channel fiber yarn.The fluid stream adjustor 21 that egative film 22 is separated with absorbent cores 24 prevents that fluid from arriving following absorbent cores 24 too quickly.If fluid is located on the yarn contact of the capillary channel fiber 25 in the pleat 26 of second top flat 27, fluid is with main vertically scattering along sanitary towel 20.In other words, the fluid stream adjustor of being made up of second top flat and capillary channel fiber 25 has promoted fluidic lengthwise movement, rather than fluid is directly sunk on the part of the absorbent cores under the shock point on the egative film 22 24.

Second top flat 28 allows fluids 24 to move along the Z direction towards absorbent cores, but its movement velocity is small enough to make fluidic major part longitudinally move through capillary channel fiber 25, allows fluid to see through second top flat, 27 arrival absorbent cores 24 at last.

By fluid that health discharges is flowed before receiving depositing on the absorbent cores 24 or be absorbed core 24, make absorbent cores 24 obtain to make full use of.Owing to made full use of whole absorbent cores 24, to stain so can reduce side, this drainage occasion for all reality all is suitable for.

Being absorbed core 24 at fluid makes before absorbing idea that fluid longitudinally moves for being valuable especially under the situation in sanitary towel for example in some cases.The fluidic target area of body discharges almost is the narrowest part of sanitary towel 20 in sanitary towel.Therefore, human skeleton forces the heap(ed) capacity district of absorbent cores to be in laterally, so the very wide major part of absorbent cores 24 is not utilized.

Fluidic total motion of body discharges can be regarded as a kind of Z direction motion, then, is right after the motion of Z direction and is regarded as a kind of lengthwise movement afterwards.In other words, when body fluid deposited in the sanitary towel 20, they at first passed top flat 22 and move on the Z-direction.Then, on the absorbent cores 24 of body fluid below being transported to before, by the effect of fluid adjustor 21, in lengthwise movement.As mentioned above, this will make whole absorbent cores 24 be subjected to more efficient use.

By making fluid in the motion of Z direction, then, be right after the motion of Z direction in lengthwise movement, the capillary channel fiber 25 of fluid adjustor is able to " recovery " and prepares against absorption fluids next time, so make top flat 22 keep fresh, exsiccant the look and feel.Sanitary towel 20 just can continue this process, reaches capacity until absorbent cores 24.

For fluid is moved between each layer of sanitary towel 20, importantly make each layer maintenance each other closely, in other words conj.or perhaps directly contact.Can realize this contact with certain methods, that these methods include, but is not limited to is bonding with bonding agent, with ultrasonic bonding etc., or connects by tension force.

Therefore, in a very desirable pattern, at top flat 22(by leading to capillary channel fiber 25 here) and the absorbent cores 24 of the second top flat 28(below leading to here of fluid adjustor 21) between the network that connects in having one, so pass top flat 22 fluid high-effective, along capillary channel 25, enter second top flat 27, enter absorbent cores 24 again.Even interconnecting under the situation that is subjected to using tension force (for example moist, mechanical shearing and the pressurized that links mutually with the motion of the health of wearer-lax) between this each layer still keeping.

If adopt bonding agent to connect, should consider Several Factors.The amount that is used in the bonding agent in the figure should make bonding the be restricted to minimum of absorbent item to the user health, and described figure is top coating adhesive.

Recognize that the capillary channel that adopts excessive bonding agent may cause undesirable fiber 25 stops up, thereby reduced its effect.So the quantity of the bonding agent that uses should be the quantity of one " non-interference ".These quantity can be according to selected bonding agent, the arranging graphic of bonding agent, the width of capillary channel and the width of fiber etc. and change.The quantity of control bonding agent also helps to make bonding the reach bottom line of sanitary towel to the user health.

Bonding agent should be to skin non-irritating be used in sensitive organization with human body and contact under the occasion and accept for toxicology.When bonding agent is not deposited at dampness (when making this absorbent item), preferably (when using absorbent item) still keeps its viscosity when dampness exists.

Bonding agent should be the adhesives when making top flat, is again the adhesives of making capillary channel fiber.If top flat or fibre weight are surface treated, for example use hydrophiling technology, when selecting bonding agent, should consider to handle the person's character on surface.

Typical as used herein bonding agent can be chosen from latex bonding agent and hot-melt adhesive.

Bonding agent can be applied by a random figure, yet preferably utilize scroll or multiple spiral figure.The bonding agent lines can be the underwear side by the downside that the spiral type figure is ejected into top flat 22 by the nozzle of 0.2mm, still are gratifying but utilize the adhesive linkage of the nozzle injection that can arrive 0.6mm at least greatly.In addition, also bonding agent can be ejected on the top flat 22 with point-like, but this is less desirable.

The bonding agent that is fit to can be bought from Findley Adhesives, particularly hot-melt adhesive 4031 and latex 8085.Type according to the type bonding agent of the coating on capillary channel fiber can be slightly different.The coating that is fit to comprises Eastman ' sLK5483, LK5563 and Eastman ' s LK5570 the most preferably, and the polymer bought of trade name that can MILEASE T, this polymer is well-known in washing process as a kind of ethylene terephthalate/polyetholglycal terephthalare decontamination polymer of coated fiber, and this polymer can have been bought from ICI America.

Authorize as on March 4th, 1986 described in people's such as Minetola the United States Patent (USP) 457398, bonding agent can be painted the web of the opening of bonding agent long filament.Use is rolled into the scroll goods by the retaining element that is fit to of the netted silk of an open figure that several lines of bonding agent long filament are formed, this rolling technology is to illustrate by the apparatus and method described in the following patent document: authorized Sprague, the United States Patent (USP) 3911173 of Jr on October 7th, 1975; Authorized Zieker people's United States Patent (USP) 4785996 on November 22nd, 1978; And on June 27th, 1989 authorize the United States Patent (USP) 4842666 of Werenicz.

By pressurization in bonding process and/or by the method that makes the superiors' capillary channel fiber " combination " form independent fiber initiation (this projection make contact better) with binding agent can further improve top flat and below the capillary channel fiber layer between contact.

F. Ren Xuan holding device

In use, sanitary towel 20 can utilize the support component arbitrarily or the fixed part that are used for this purpose to remain on certain position.Sanitary towel preferably places on the underwear of user or the underwear and is fixed thereon with-fixture (for example bonding agent 36).Bonding agent 36 provides means for the crotch portion that sanitary towel 20 is fixed to underwear.Therefore, the outer surface part of egative film 23 or all be coated with the last layer bonding agent.In prior art for this purpose and any bonding agent of usefulness or glue can be used as this bonding agent, with pressure adhesive for the most desirable.The bonding agent that is fit to is by the cenlury Adhesives Corporation of Columbus(Ohio) the Century A-305-IV made, and by the national starch and Chemical Company of Bridgewater(New Jersey) the Instant Lock 34-2823 that makes.The bond that is fit to has introduction in United States Patent (USP) 4917697.In the time of before sanitary towel is in use, on pressure adhesive 36, be stamped the peelable release liner of one deck 37 usually, become dry or adhere on the surface except that the surface of the crotch portion of user underwear so that prevent bonding agent before use.The release liner 37 that is fit to also has description in the United States Patent (USP) 4917697 of above-mentioned reference.Any kind of commercially available release liner that is used for these purposes all can be used at this.The example of the indefiniteness of the release liner that is fit to is by Akrosil Corporation of Menasha(Widconsin) the BL30MG-A Si/oX EI/O and the BL30MG-A Si/oX 4P/O that make.When using sanitary towel 20 of the present invention, the release liner 37 of tearing is placed on sanitary towel 20 on the underwear then, so that make bonding agent 36 with the underwear contact, between the operating period, bonding agent 36 keeps sanitary towels on the correct position of underwear in sanitary towel.

G. Ren Xuan parts

Sanitary towel 20 can also have two limit tongues 34, and wherein each is near the lateral edges of absorbent cores and along laterally extending out from this lateral edges.The shape of limit tongue 34 should be fit to cover on the edge of wearer's underwear in crotch district, so that make limit tongue 34 between the edge and thigh of wearer's underwear.

Limit tongue 34 has two effects at least.The first, limit tongue 34 helps preventing that wearer's health and underwear from being got wet by menstruation, preferably a kind of double-walled barrier that forms along the underwear edge by limit tongue 34.The second, limit tongue 34 is preferably with and is positioned at the more lip-deep fixtures of wearer's underwear, and making can be with limit tongue folding below the underwear and bond on the clothes of underwear side.

Limit tongue 34 can be made of various materials, and these materials comprise and are similar to top flat, egative film, the such material of fabric, or the compositions of these materials.In addition, the limit tongue can also be attached to one on sanitary towel's main part element independently, or can constitute by the extension of top flat 22 and egative film 23 (promptly whole).

Some have the sanitary towel that is fit to the limit tongue that uses with sanitary towel of the present invention and are disclosed in the following files, and they are: authorized the United States Patent (USP) 4687478 of the exercise question of Van tilburg for " the shaping sanitary towel that has the limit tongue " on August 18th, 1987; The name of authorizing Van Tilburg on May 20th, 1986 is called the United States Patent (USP) 4589876 of " sanitary towel ", and the name of authorizing Medingly on August 26th, 1989 is called the United States Patent (USP) 4608047 of " sanitary towel's connector ".

H. the assembling of each parts of sanitary towel

Preferably assemble sanitary towel with following manner.For simplicity, by a kind of possible method this assembling process is described.The step that describes below can be finished with a lot of different ways.Also have a lot of alternate manners of assembling sanitary towel.All these available schemes all within the scope of the invention.

With second top flat, 27 auxilliary being placed on the shaping rod, so that on second top flat, form first pleat.Repeat this technology up to till 6-12 pleat all finished on second top flat 27.

The yarn of capillary channel fiber 25 is put into each pleat of second top flat 27.Exceed outside the pleat of second top flat 27 up to the yarn that can see capillary channel fiber 25 till.The yarn of capillary channel fiber can be placed in the pleat in successive strand mode, and that part of yarn outside the end of top flat 27 is stretched out in combing subsequently.Perhaps adopt other scheme; Each yarn is cut in advance the length of each pleat that can put into second top flat 27.

With adhesive applicating to top flat 22 on underwear side (downside).Preferably make bonding agent become roulette pattern be coated to top flat 22 on the inboard.Then top flat 22 is placed on the top of second top flat 22 of beating pleat, so that capillary channel fiber is fixed between the top flat 22 and second top flat 27.Pressurize in order to realize being fixed on the top flat.

Utilize bonding agent that absorbent cores 24 is adhered on the body-facing surface of egative film 23 simultaneously.Surely, obtain these before to the egative film 23 and be used for the parts of absorbent cores in that absorbent cores 24 is sticking.Absorbent cores 24 preferably one above-mentioned by two-layer

cross-linked cellulose fibres

41 and 42 with being clipped in the lamination that its intermediary gel material particle 40 is formed.Absorb the top (or its part bottom) that gel rubber material 40 is placed on sheet, thereby form the bottom 42 of cross-linked cellulose fibres.The upper strata 41 of absorbent cores 24 is placed on the particulate top of lamination that absorbs gel rubber material 40.This absorbent core components is arrived together by sewing or adhesive securement.Then this egative film absorbent cores assembly is placed on the assembly of top flat collecting layer, has so just constituted a pre-assembled sanitary towel.Should pre-assembled sanitary towel seal simply then.In a preferable technology, partly seal by the vertical side of the edge part and the end margin of a heater with sanitary towel.Heater is in the same place vertical side of the edge part and end margin part " pressing ".

3. another embodiment of sanitary towel of the present invention

Fig. 9 is that sanitary towel 60 of the present invention is at the top view that is in another embodiment under the situation of flat form, for the structure that more clearly illustrates sanitary towel 60 several portions of its structure is cut open, and towards or the sanitary towel 60 of contact wearer 60a that part of towards the observer.As shown in Figure 9, sanitary towel 60 preferably includes the top flat 62 of a saturating liquid, liquid-tight egative film that is connected with top flat 62 63, one at absorbent cores 64 between top flat 62 and the egative film 63 and the fluid adjustor 61 between top flat 62 and absorbent cores 64.Fluid adjustor 61 comprises one second top flat 66 and by the non-woven fleece 65 with outer surface capillary channel.

Figure 10 is the cutaway view along the sanitary towel 60 that the cutting line of Fig. 9 is got.As can seeing among Figure 10, be superimposed upon on second top flat, 66 body-facing surface by having the non-woven fleece 65 that the outer surface capillary channel fiber constitutes.Second top flat constitutes fluid adjustor 61 with non-woven fleece.The formation that fluid adjustor 61 preferably is provided with is a series of basically along the pleat 67 that is parallel to the longitudinal extension of sanitary towel 60.

Sanitary towel 60 has two surfaces, a surperficial 60a and the surperficial 60b towards underwear towards human body.Sanitary towel shown in Figure 9 be from it towards the surface observation of human body.Towards the surperficial 60a of human body is to want the nearly wearer's body of towel to be worn, the surperficial 60b towards underwear of sanitary towel 60.Being positioned at an opposite side is the underwear that will be used near the wearer.

Sanitary towel 60 preferably includes and is used for sanitary towel 60 is adhered to the part 71 that is adhesively fixed on the user underwear.Discerptible release liner 72 covers on the part 71 that is adhesively fixed, and adheres on the surface except that the crotch district of underwear so that prevent bonding agent before use.

Egative film 63, top flat 62, absorbent cores 64, be adhesively fixed part 71 and release liner 72, the second top flats 66 and non-woven fleece 65 preferably are made up of the material that describes in detail above, and constitute by top structure detailed.

The direction of passage of fiber that preferably makes non-woven fleece 65 is substantially to towards vertically.Therefore, make the fluid motion longitudinally before guiding to second top flat 66 that is deposited on the non-woven fleece 65, second top flat 66 is guided to absorbent cores 64 with fluid.

Though specific embodiments of the invention are described in conjunction with diagram, for this professional those of ordinary skill, can be without prejudice to marrow of the present invention with can make various change and remodeling within the scope of the invention.Therefore all these changes within the scope of the invention and remodeling all will be included by claims of the present invention.

Claims

1, a kind of have one vertically, one laterally and Z to absorbent item, this absorbent item comprises:

(a) top flat of a permeate fluid;

(b) fluid-tight egative film that links to each other with this top flat;

(c) absorbent cores that is positioned between this top flat and this egative film, this absorbent cores have a upper surface and the lower surface towards this egative film towards top flat;

(d) fluid stream adjustor that is positioned between this top flat and this absorbent cores, this fluid stream adjustor has promoted fluid motion longitudinally, control simultaneously fluid along laterally and Z to move.

2, absorbent item as claimed in claim 1, wherein, this fluid stream adjustor comprises that one second top flat and some have the fiber of outer surface capillary channel.

3, absorbent item as claimed in claim 2, wherein, the configuration of this second top flat is to make some pleats basically along the longitudinal extension of this absorbent item of equality.

4, absorbent item as claimed in claim 3, wherein, this has the processed resultant yarn shape of fiber of outer surface capillary channel and is positioned in the pleat of this second top flat.

5, absorbent item as claimed in claim 3, wherein, this fiber process with outer surface capillary channel becomes non-woven fleece, and this non-woven fleece is stacked on this second top flat.

6, absorbent item as claimed in claim 3, wherein, the orientation of the fiber with outer surface capillary channel of this non-woven fleece is to make their passage be located substantially on the vertical of parallel this absorbent item.

7, absorbent item as claimed in claim 2, wherein, this outer surface capillary channel fiber is hydrophilic.

8, a kind of have one vertically, one laterally and Z to absorbent item, this absorbent item comprises:

(a) top flat of a permeate fluid;

(b) fluid-tight egative film that links together with top flat;

(c) absorbent cores that is positioned between this top flat and 7 these egative films, this absorbent cores have a upper surface and the lower surface towards this egative film towards this top flat;

(d) second top flat that is positioned between this top flat and this absorbent cores, the configuration of this second top flat are to make several pleats basically along the longitudinal extension of parallel absorbent item.

(e) several fibers with outer surface capillary channel that are positioned between this top flat and this egative film are placed in those pleats of this second top flat.

9, absorbent item as claimed in claim 8, wherein, this has the processed resultant yarn shape of fiber of outer capillary channel.

10, absorbent item as claimed in claim 9, wherein, capillary channel fiber is hydrophilic.

11, absorbent item as claimed in claim 10 wherein, has the cross section that the silvalin of capillary channel has H shape.

12, absorbent item as claimed in claim 9, wherein, the silvalin with outer surface capillary channel is twisted.

13, absorbent item as claimed in claim 8, wherein, this absorbent cores comprises the absorption gel rubber material between the upper and lower surface that is placed on this absorbent cores.

14, absorbent item as claimed in claim 8, wherein, this second top flat is a fabric.

15, a kind of have one vertically, one laterally and Z to absorbent item, this absorbent item comprises:

(a) top flat that sees through liquid;

(b) liquid-tight second egative film that connects with top flat,

(c) absorbent cores that is positioned between this top flat and this egative film, this absorbent cores have a upper surface and the lower surface towards this egative film towards this top flat;

(d) second top flat that is positioned between this upper surface and this absorbent cores, the configuration of this second top flat are to make several pleats basically along the longitudinal extension of parallel absorbent item.

(e) non-woven fleece is positioned between this top flat and this second top flat, and is superimposed upon on the body-facing surface of this top flat.

16, absorbent item as claimed in claim 15, wherein, this non-woven fleece is by having the fibrous of outer surface capillary channel.

17, absorbent item as claimed in claim 16, wherein, this orientation with fiber of outer surface capillary channel is to make their passage be located substantially on the vertical of parallel this absorbent item.

18, absorbent item as claimed in claim 17, wherein, this fiber with outer surface capillary channel absorbs water.

19, absorbent item as claimed in claim 15, wherein, this absorbent cores is made up of the absorption gel rubber material of the upper and lower surface that is placed on this absorbent cores.

20, sanitary towel as claimed in claim 15, wherein, this second top flat is a fabric.