CN1419433A

CN1419433A - Co-apertured system for hygienic products

Info

Publication number: CN1419433A
Application number: CN01807011A
Authority: CN
Inventors: J·布拉弗曼; C·W·科尔曼; M·A·达利; R·L·埃登斯; A·E·加拉瓦格利亚; A·M·吉恩克; Y·L·哈蒙兹; N·D·科林; M·B·科特克; T·L·梅斯; D·M·马特拉; S·J·莫德尔; J·A·布拉姆斯特德特内尔森; S·R·拉斯穆森; T·H·雷斯勒; L·J·瓦尔克
Original assignee: Kimberly Clark Worldwide Inc
Current assignee: Kimberly Clark Worldwide Inc; Kimberly Clark Corp
Priority date: 2000-03-24
Filing date: 2001-03-21
Publication date: 2003-05-21
Also published as: EP1267776A1; KR20020081486A; AU2001249332A1; JP2004501676A; WO2001072251A1; BR0108683A; ZA200206308B; MXPA02008668A; AR028271A1

Abstract

A system for a hygienic product having a cover layer, an intake/distribution layer and an absorbent core, in which at least the cover and intake/distribution layers are co-apertured. Combining these improvements into an integrated absorbent system allows the successful achievement of variable flow management and a successful balance between intake and cover desorption properties. The result is improved multiple intake performance and a clean and dry cover surface during use.

Description

The co-apertured system that is used for health product

Technical field

The present invention relates to a kind of used system of assimilate, health, personal care product, particularly feminine hygiene that is used for.This product must receive viscous fluid fast and keep it, and it just can not be diffused into outer consequently stained wearer's the underwear of product like this.

Technical background

The personal care product comprises for example diaper, training pants, feminine hygiene such as sanitary towel, underpants lining and tapon, incontinence undergarments and device, binder etc.The most basic design of all these products typically comprises a bodyside liner (clad material), an outer covering layer (being also referred to as block piece) and place absorbent cores between a bodyside liner and the outer covering layer.

The personal care product must receive fluid fast and preserve them, so that reduce the probability that leaks into outside the product.Product should be softish and make skin that comfortable sensation be arranged, even also can be not coalescent after fluid is stained, distortion or adhesion user and make the wearer uncomfortable.Unfortunately, product formerly meets many standards in various degree, and some does not then have.

Particularly, the feminine hygiene that long-term (promptly spending the night) uses will be born the higher and more diverse flow rate of using than routine or short-term, and fluid-load use than routine or short-term those are many.Therefore, spend the night the product that uses in the useful life of product, must have and absorb and retain continuously and small volume of fluid and gushing out and a large amount of fluidic abilities suddenly.Have found that the stained average out to 1ml/hr of Continuous Flow in the feminine hygiene, but can be higher, and not exclusively continuously or continue, but rate-compatible even in the cycle, suspend.The phalangeal process that " shoves " a large amount of fluidic situations of so gushing out, and take place with the flow rate that reaches 1ml/sec.During shoving, the fluid of 1-5ml is discharged on the product from health.Term " Continuous Flow " is used to refer to any various streams outside the definition of shoving.

The combination of the Continuous Flow and the situation of shoving produces non-uniform flow.In fact, " non-uniform flow " is defined as the Continuous Flow of shoving and taking place therebetween.Fig. 1 is the figure of explanation difference between useful life's internal speed-changing of single product stream (rhombus) and Continuous Flow (square), is the unit representation flow rate with g/hr at the y-axle wherein, at the x-axle hour being the unit representation time.

The fundamental challenge of product is partly or entirely to be soaked into the shove ability of (burst fluid) of post processing by stained and absorption system at product.

Many feminine care clad materials have the low conductivity, low-surface-energy of z-direction, low space volume, and because their two-dimensional structure thereby have very little separation between absorbent cores and user.As a result, these coating cause slow and incomplete suction, height is moistening again and the surface blot of bulk.In addition, typically sucking or obtain layer is low-density, high-voidage volume structure, it sucks very desirable to rapid fluid, but because these structures typically have the low capillary effect and because their common fibrous characteristics, fluid can not come out from the abundant desorption of clad material, causes stained and surface moisture.The material that strengthens the coating desorption typically is high density, high capillarity material, but because the hypotonicity that these materials have low space volume and z-direction, they postpone fluid in essence and suck.

Also have the demand to this system to be, this system is designed to promote suck fast and keeps cleaning and dry, and receives fluid with proper speed.Also having the demand to such system is that this system also allows absorption of fluids in the specific absorption layer.

Therefore, an object of the present invention is to provide a kind of like this system.Another object of the present invention provides the design of the feminine hygiene that adopts this system, especially for the design of the medium of high fluid-load.

Summary of the invention

Purpose of the present invention can realize that this system has a coating by such system, a suction/Distribution Layer and an absorbent cores, and wherein coating and suction/Distribution Layer are co-apertured at least.Also can have other layer, these layers comprise surges and transfer delay layer.Coating can be film or the supatex fabric made by the thermoplastic polymer.Suction/Distribution Layer is supatex fabric preferably, and preferably makes through air-laid process.Surge layer and transfer delay layer normally change the supatex fabric of wettability, hole size, permeability and fiber denier.Absorbent cores can be made by slurry, superabsorbent thing or various other absorbing material.System of the present invention causes improved repeatedly stained absorption, allowing fluid storage in certain layer, thereby provides clean and exsiccant clad surface during use.Provide these functional characteristics by improved material technology and product structure.

Description of drawings

Fig. 1 is the variable-flow (rhombus) in the useful life of single product and the chart of continuous-flow (square), is unit representation flow rate volume at the y-axle with Grams Per Hour (g/hr) wherein, and at the x-axle hour being the unit representation time;

Fig. 2 demonstrates the pin of use 2.06mm diameter with 7.4 holes/cm ²The pin hole pattern that forms;

Fig. 3 demonstrates the pin of use and Fig. 2 same diameter with 2.5 holes/cm ²The pin hole pattern that forms;

Fig. 4 is the sketch map of the unit that tests the speed that is suitable for determining the fluid respiratory time of material or material system;

Fig. 5 is the sketch map of absorption system, and this absorption system has the hole of running through coating and absorption/Distribution Layer;

Fig. 6 is the sketch map that is similar to the co-apertured absorption system of Fig. 5, this system between coating and suction/Distribution Layer in conjunction with an additional material layer; And

Fig. 7,8,9,10,11,12 and 13 is the examples that can be used for the sectional co-apertured pattern in the practical application of the present invention.

Definition

Here employed term " supatex fabric or paper web " refers to a kind of like this fabric, and it has the single fiber of mutual stratification or the matrix of line, but does not adopt such as discernible mode in the knit goods. Supatex fabric or paper web are by for example meltblown, spun-bond process and the formation of bonded carded paper web method of many methods. The basic weight of supatex fabric represents that with ounce number (osy) or g/m (gsm) of every square yard of material the diameter of useful fiber represents with micron usually usually. (note converting gsm to from osy, need to take advantage of osy with 33.91).

" spun-bonded fibre " refers to by making the melting heat moulding material push the small diameter fibers that filamentation forms through the many thin capillary tube of spinning head.This technology is open in the United States Patent (USP) 4,340,563 of for example authorizing people such as Appel.Fiber also can have those shapes of describing in 5,227, No. 976 United States Patent (USP)s for example authorizing people such as Hogle, and this patent has been described the fiber with unconventional shape.

" bonded carded paper web " refers to the paper web made by the synthetic staple of carrying through combing or comb unit; this combing or comb unit make the synthetic staple fracture and align along machine direction, to form the cellulosic nonwoven web of common machine direction orientation.This paper web is a little bonding by comprising, ventilative bonding etc. method combines.

" air lay " is the known method that forms the cellulosic non-woven layer.In the air lay method, will have about 3 the fibrillose bundles of typical length to about 19 millimeters scopes and separate and in source of the gas, carry secretly, it is online to be deposited on forming screen then, and this carries out under vacuum source is assisted usually.Then by using hot-air for example or jet binder that the fiber of random deposition is together with each other.The example of air lay technology can find on No. 4640810 United States Patent (USP)s authorizing people such as Laursen.

Here employed term " is shaped altogether " and is meant a kind of method, and wherein at least one meltblown beam is arranged near the inclined tube place, when it is shaped other material is added on the paper web through inclined tube.These other materials can be pulp, superabsorbent thing or other granules, natural polymer (for example, artificial silk or cotton fiber) and/or synthetic polymer (for example polypropylene or polyester) fiber, and for example, fiber can have staple length.Altogether manufacturing process has description common authorizing No. 4818464 of Lau and authorizing in people's such as Anderson No. 4100324 United States Patent (USP)s of transferring the possession of.Paper web by manufacturing process production altogether is commonly referred to common moulding material.

" co-apertured " refers to a kind of material of perforate, and the process of perforate, wherein two or more materials perforate together.The hole from the top of material the end of to, and basically mutually alignment extend.By entanglement, physical bond or chemical bond, co-apertured material temporarily or for good and all can the connection.At ambient temperature or can finish co-apertured layer under the elevated temperature.Higher temperature helps the material combination and produces cleaner and tidier hole.A co-apertured process is, together crosses roll gap between the roller of two reverse rotations to the warp let-off by making each layer, and one of them roller has pin, makes pin pass through each layer, to produce the hole.The hole can, for example, have diameter from 0.5mm to 5mm, its use from about 1 to 15 holes/cm ²The pin of density, and generation has less than 19.6mm ²The hole of area, and the scope of atresia area is from about 2 to about 25%.Co-aperturedly can be used as independently " off line " operation or carry out as relatively large conversion operations (online), this depends on the economy of process and the effectiveness of equipment.The example of some co-apertured patterns that feminine hygiene pads is used visible Fig. 7-13.

" transfer delay layer " refers to a kind of like this material, this material fluid transmission speed that between other adjacent layer, slows down, but it does not retain a large amount of fluid itself.

" personal care product " means diaper, training pants, disposable swimming suit, absorbs underwear, adult-incontinence articles, feminine hygiene, wound care article such as binder and other goods.

" feminine hygiene " means sanitary towel or pad and underpants lining.

" target area " refers to this zone of personal care product, and this zone is the position that the wearer besmirches when wearing product usually.

Test method

The caliper measurements thickness (thickness) of material:

The caliper measurements thickness of material is the measured value of thickness, and is at 0.05psi (3.5g/cm with STARRET -type loft tester ²) measure under the pressure, unit is a micron.Sample is cut into 4 inches and takes advantage of the square of 4 inches (10.2cm takes advantage of 10.2cm), and measures five samples and its result is average.

Density:

Density of material is by will being that the per unit area sample weight of unit is divided by at 0.05psi (3.5g/cm with every square of Mick number (gsm) ²) under the pressure with millimeter (mm) be unit material caliper measurements thickness, this value be converted to every cubic centimetre of gram number (g/cc) calculate thereby the result be multiply by 0.001.Three samples are calculated and be averaged obtain density value.

The preparation of menses simulant:

The artificial menses fluid that is used to test is according to 5,883, and No. 231 United States Patent (USP)s are by blood and Ovum Gallus domesticus album manufacturing, and it is by being separated into blood blood plasma and erythrocyte, and Ovum Gallus domesticus album is separated into thick and rare part, wherein " thick " refer to it after homogenization at 150sec ^-1Situation under, thick Ovum Gallus domesticus album combined with blood plasma and mix fully, add erythrocyte at last and mix fully again, to have viscosity greater than about 20 centipoises.More detailed technology is as follows:

Blood, usefulness is the defibrination Sanguis sus domestica here, under 3000rpm through 30 minutes centrifugalize, though also can adopt other effective method or speed and time.With separating plasma and storage separately, remove and abandon buffy coat, the closely knit erythrocyte of independent simultaneously storage.It should be noted that must handle blood with some method can not condense so that its energy is processed.Be known the whole bag of tricks to those skilled in the art, for example remove the fibrin in the blood, additive or resist-condense chemicals and other products so that remove the coagulating fibre material.Blood is must noncondensing ability useful, and realizes this purpose and do not destroy blood plasma and erythrocytic any method all can be received.

Especially big egg separates and rejects egg yolk and egg yolk frenulum but stay Ovum Gallus domesticus album.By making Ovum Gallus domesticus album filter about three minutes, and Ovum Gallus domesticus album is divided into thicker part and rarer part, rarer part is removed by one 1000 microns nylon mesh.The thick part of staying the Ovum Gallus domesticus album on the sieve is in collection and suction 60cc syringe, and this syringe is placed on the control syringe pump able to programme then, and discharges and heavily fill out so that homogenize by its inclusions being carried out five times.In this case, this homogenize amount is by the syringe pump pump rate of about 100 ml/min and about 0.12 inch bore control.After homogenizing, condensed Ovum Gallus domesticus album has when 150sec-1 at least about the viscosity of 20 centipoises, be placed in the centrifuge then, and about 10 minutes of rotation under about 3000rpm, to remove residue and bubble.

After centrifugal treating, the condensed Ovum Gallus domesticus album that has homogenized that will comprise the ovum mucoitin utilizes syringe to dose in the FENWAL  conveying and packaging container of 300cc.Then the 60cc porcine blood plasma is dosed in this FENWAL  conveying and packaging container, clamped this FENWAL  conveying and packaging container, remove all bubbles, and be placed in the Stomacher lab mixer, it mixed about 2 minutes with standard (or medium) speed at this.From then on remove this FENWAL  conveying and packaging container in the blender then, add 60cc pig erythrocyte, knead with hands and mixed this content in about two minutes, perhaps seem homogenizing up to content.For the artificial menstruation that makes according to this example, the hematocrit of final mixture should show that the erythrocyte weight percent content is about 30%, usually should be at least in the scope of 28-32%.The percentage by weight of Ovum Gallus domesticus album amount is about 40%.

Preparing employed component of artificial menstruation and equipment is easy to obtain.List the source of goods of the project that is used for this example below, as long as their equivalences basically can be used other source of goods certainly.

Blood (pig): Cocalico Biologicals, Inc., 449 Stevens Rd., Reamstown, Pennsylvania 17567, (717) 336-1990.

FENWAL  conveying and packaging container, has adapter, coding 4R2014:Baxter Healthcare Corporation, Fenwal Division, Deerfield, Illinois 60015 by 300 milliliters.

Model is the Harvard equipment of a 55-4143 control syringe pump able to programme: Harvard equipment, and South Natick, MA 01760.

Model is BA7021, and sequence number is 31968 Stomacher 400 test chamber mixers: Seward Medical, London, Britain.

Model is 1000 tm screen of CMN-1000-B: Small Parts, Inc., mailbox 4650, Miami Lakes, Florida State, 33014-0650,1-800-220-4242.

Measure the Hemata Stat-II device of blood cell, sequence number is 1194Z03127: Separation Technologies, Inc., 1096 Rainer Drive, Altamont Springs, Florida State, 32714.

The unit inhalation test of testing the speed

This test is used for determining that known quantity of fluid sucks the time in material and/or the material system.Testing equipment comprises as shown in Figure 4 the clean preferably acrylic acid unit 10 that tests the speed.The unit 10 that tests the speed is 3 inches (76.2mm) wide and 2.87 inches (72.9mm) dark (entering in the page), and whole height is 1.125 inches (28.6mm), it is included in a center 19 on the bottom of the unit 10 that tests the speed, this center is outstanding far from the main body of the unit 10 that tests the speed, and has the height of 0.125 inch (3.2mm) and the width of 0.886 inch (22.5mm).Test the speed unit 10 for having a capillary tube 12 of 0.186 inch (4.7mm) internal diameter, and this capillary tube extends to centrage 16 with the angles that become 21.8 degree with horizontal level under oblique from a side 15.The hole that can bore appropriate size with suitable angle by side 15 from the unit 10 that tests the speed, this hole begins at the some place of 0.726 inch (18.4mm) on the bottom of unit 10 of testing the speed, and makes capillary tube 12; But on the starting point of boring must be blocked subsequently in side 15, test fluid just can not overflowed therefrom like this.Top-portion apertures 17 has the diameter of 0.312 inch (7.9mm), and the degree of depth of 0.625 inch (15.9mm), so that it and capillary tube 12 intersects.Top-portion apertures 17 is perpendicular to the top of the unit 10 that tests the speed, and is that 0.28 inch (7.1mm) is the center with distance side 15.Top-portion apertures 17 is such openings, wherein is placed with funnel 11.Centre bore 18 is for the fluidic progress situation of viewing test, and in fact is oval in the plane of Fig. 4.Centre bore 18 is placed in the middle on the width of unit 10 that tests the speed, and has 0.315 inch (8mm) wide and from 1.50 inches (38.1mm) long bottom outlets of center to center of the semicircle of 0.315 inch (8mm) diameter forming oval-shaped end.For ease of observing, ellipse is wide and 1.930 inches (49mm) length from the bottom to 0.395 inch (10mm) of the unit 10 that tests the speed, and size has been amplified 0.44 inch (11.2mm).Boring also can produce top-portion apertures 17 and centre bore 18.

Stamping is cut assimilate 14 and the coating 13 that a 10.2cm takes advantage of 10.2cm (4 inches * 4 inches) sheet.Specific coating is described in specific example.Except as otherwise noted, the assimilate that is used for these researchs be standard and by 250g/m ²Air lay constitute, this air lay is made by 90% CR-0054 (the US Alliance PulpMils of the Alabamian Coosa of the U.S.) and 10% KoSa T-255 binding agent.The gross density of this system is 0.14g/cc.Coating 13 is placed on the assimilate 14, and the unit 10 that tests the speed is placed on the top of two materials.2 milliliters menses simulant is transported in the funnel 11 of testing equipment, and picks up counting.Fluid is shifted to pipeline 12 from funnel 11, and this fluid is from this line transportation to material or the material system.Stop timing to material or material system the time when observe all absorption of fluids from the intracavity of testing equipment.Respiratory time to the known fluid of given material or material system record known quantity.This value is measuring of material or material system absorbability.Usually, finish 5 to 10 repetitions, and determine average respiratory time.

The test of rewetting profit

This test is used to determine to turn back to the Fluid Volume on surface when applying load.The Fluid Volume that returns by the surface is called as " moistening again " value.It is many more to turn back to lip-deep fluid, and " moistening again " value is big more.Less wetting value again is relevant with more exsiccant material and even more exsiccant product.When considering the rewetting profit, three performances are important: (1) inhalation rate, if materials/systems does not have good suction speed, fluid can be moistening more so; (2) ability of assimilate trap fluid (the assimilate trap fluid is many more, and it is few more to be used for moistening fluid again); (3) reflux, coating forbids that the fluid that fluid turns back on the whole coating is many more, moistening fewer more.

Do not consider variable (2), we assess assimilate and keep constant coating system, and we only are concerned about variable (1) and (3) like this, are respectively imbedibility and backflow.

Die-cut 10.2cm takes advantage of the assimilate and the coating of 10.2cm (4 inches * 4 inches) sheet.Except as otherwise noted, the assimilate that is used for this research be standard and constitute by the air lay of 250gsm, this air lay is made by 90% CR-0054 (U.S. Alabamian CoosaUSAlliance Pulp Mils) and 10% KoSa T-255 binding agent.Unless otherwise prescribed, the gross density of this system is 0.14g/cc.Coating is placed on the assimilate, and the unit that tests the speed is placed on the top of two materials.2 milliliters menses simulant is transported to the cell arrangement that tests the speed, and is drawn in 4 inches * 4 inches facing material samples on the top of the absorbing sheet that is placed on 4 inches * 4 inches.Fluid can place the top of material with the system interaction unit that tested the speed simultaneously in 1 minute.Material system coating and assimilate are placed on and are full of on the fluidic bag.A slice blotting paper is weighed and placed it on the top of material system.The vertical traverse of bag touches polypropylene board on it up to it, so at first makes whole material system push down plate blotting paper side.System pushes down polypropylene board up to the gross pressure that applies 1psi.Stable this pressure of maintenance three minutes removes pressure thereafter, takes by weighing the weight of blotting paper.The blotting paper reservation is transferred to its any fluid from coating/absorption system.Weight difference between the blotting paper after original blotting paper and the test is known as " moistening again " value.Typically, carry out five to ten times and repeat, and determine wetting value again.

Three inhalation test processes:

The purpose of this test is to determine to suck the difference of speed between material and/or material, composite or the composite system applying 3 burst fluid spots when (shoving), and its time allows fluid to be assigned in the material between spot.With preparing measured material with the above-mentioned identical mode of unit inhalation test that tests the speed.Two 2 milliliters menses simulant is given material through the unit that tests the speed.Remove the unit that tests the speed after 9 minutes, and each layer is weighed all and is write down weight.To all 3 times stained this steps that repeat, carry out the test of the profit of rewetting as mentioned above thereafter, and write down its value.The weight that fluid-load in each parts utilizes the weight after stained to deduct before stained is calculated.The stained time is the soak time of directly measuring.The more assimilate sample of smaller value representative of respiratory time, and the less absorption sample of bigger respiratory time representative.Should assess three samples to every kind of material.

Fluid distributes test:

Design this test measure form the personal care product particularly the fluid in each layer of feminine care distribute.Every layer material in the tested sample should be weighed before test and be write down weight.Measured material is kept flat, and the hourglass shape plate is placed on the material.It is polyacrylic that plate is preferably, and long 21.5cm, and wide 8.7cm weigh 230 grams, and the heart has a hole that 3mm is wide therein.Load 800 gram imposts on the plate, these weight are evenly distributed on its surface as far as possible.In case sample is ready to for test, during one hour, the menses simulant of 7ml is delivered to sample through the hole with uniform rate.Providing a method of analogies to sample is to be Harvard equipment pump and the plastic tube of 55-4143 with model, and can use correlation method known to a person of ordinary skill in the art.After one hour, remove plate and take by weighing the layer weight.Weight difference dried and wet layer is exactly the amount of every layer of analogies that is absorbed.Then, the fluidic percentage ratio that retains in can calculating every layer.Should calculate three samples to every kind of material

The specific embodiment

In sum, the present invention relates to a kind of synthetic that is used for feminine hygiene pads, wherein the coating of synthetic and suction/Distribution Layer are co-apertured.These layers are a coating, a suction/Distribution Layer, an optional surge layer, an optional transfer delay layer and an absorbent cores.Can by various processes comprise air lay, spunbond, melt and spray, combing, be shaped altogether and foaming technology is made fabric used in the practice of the present invention, although preferably suction/Distribution Layer be with air lay and transfer delay layer with spunbond.Can make each layer by man-made polymer and natural fiber.Particularly consider cost preferably polyolefin such as polyethylene and polypropylene.

Fig. 5 demonstrates one embodiment of the present of invention.In Fig. 5, outer covering layer 5 is most external of product.Absorbent cores 4 next-door neighbour's outer covering layers 5 are provided with.What be close to absorbent cores 4 is optional transfer delay layer 3.Coating 1 and suction/Distribution Layer 2 are co-apertured, by taper 6 expressions.

Fig. 6 demonstrates another embodiment of the present invention, and is similar with Fig. 5, and wherein another layer 7 has been interposed between coating 1 and the suction/Distribution Layer 2.This extra play 7 can be, for example, and surge layer.

Importantly coating is with in the quick suction product of dirt and have a soft-surface.Many materials provide this suction characteristic.These comprise film, non-woven fabric and film/nonwoven laminate, non-woven/the non-woven layer casting die, conjugate fibre nonwoven fabric, the nonwoven fabric that creases, airlaid fabric, bonded carded paper web, jet ring spray supatex fabric, cotton ginning supatex fabric etc.Many initial inappropriate clad materials can become receivable by using the processing of partial chemical treatment and mechanical technology.Any material, it allows to suck fast, hang down stained when combining with absorbent cores under all flox conditions, and low moistening again and low fluid retains, and all is suitable in the practice of the present invention.These materials can comprise that also different additives is to improve flexibility or to make dermal sensation good.

Suction/Distribution Layer can and comprise staple fibre and the mixture of the fiber of natural fiber is made by various fibers, and they comprise machinery and chemical softening slurry, staple fiber, cotton sliver, melt and spray and spun-bonded fibre, superabsorbent thing etc.Fiber in this paper web can be made by the fiber of identical or different diameter, also can have difformity for example five leaf, trilobal, ellipse, circle etc.Suction/Distribution Layer can be made by many methods, and these methods comprise that air lay, water tangle, bonding and combing, and are shaped altogether, although air lay preferably.Suction/Distribution Layer can have the basic weight between the density and about 100 to 300gsm between about 0.06 to 0.19g/cc.

Optionally surge layer is used for absorbing a large amount of unexpected fluid streams.Provide the control material of surging to be used for spot that quick reception will face and also absorb, retain, guide or handle fluid on the contrary so that it can not leak into outside the goods.By the fluff pulp that absorbs in the product, perhaps for example nonwoven fabric or bonded carded paper web of high osmosis non-woven layer typically provides the control of surging.

Optionally transfer delay layer also can be made by the various fibers that are different shape and size, and also a kind of film.Also can be for example spunbond according to many PROCESS FOR TREATMENT, combing, melt and spray with film molding and make transfer delay layer, although preferably spunbond.The purpose of transfer delay layer is to make fluid slowly flow to the absorbed layer that is close to transfer delay layer at either side from suction/Distribution Layer.

Absorbent cores or retain layer material and can be made by material well known in the art or material also can be made by any other material of development for this purpose.Example comprises fast and slow superabsorbent thing, slurry and its mixture.Can calculate by weight between about 100/0 and 0/100, between particularly about 80/20 and 20/80, ratio use as retaining the superabsorbent thing of material and the mixture of slurry.Be suitable for absorbent cores of the present invention typically have about 0.05 and 0.20g/cc between density, and about 150 and 500gsm between basic weight.The layer that comprises absorbent cores more than one deck also can be arranged.Absorbent cores has the binding agent of some forms usually, so that parts are fixed together.Typically binding agent comprises conjugate fibre, can be by heat activated powder adhesive, and liquid adhesive.

Staple fibre comprises that those are by known any other suitable rayon fibers of polyamide, polyester, artificial silk, polypropylene, superabsorbent thing, LYOCELL  regenerated cellulose and those of ordinary skill in the art.For product can be degraded, staple fibre also can comprise kosmotropes.

Many polyolefin can be used as the production of fiber, polyethylene for example, and as the ASPUN  6811A linear low density polyethylene of Dow chemical company, 2553 LLDPE and 25355 and 12350 high density polyethylene (HDPE)s all are this suitable polymers.It is respectively about melt flow rate of 26,40,25 and 12 that polyethylene has.The polypropylene of fibre forming comprises ESCPRENE  PD 3445 polypropylene of Exxon chemical company and the PF-304 of Montell chemical company.Commercially also can obtain other polyolefin.

Natural fiber comprises Pilus Caprae seu Ovis, cotton, Caulis et Folium Lini, Fructus Cannabis and wood pulp.The standard softwood that wood pulp comprises fluffy grade is CR-1654 (the US Alliance PulpMills of the Coosa of Alabama) for example.Can make fiber crimp by the method that comprises chemical treatment or mechanical distortion to the inherent character of slurry modification with fortifying fibre and their processing characteristicies.It is curled.By using for example formaldehyde or derivatives thereof of cross-linking agent, glutaraldehyde, expoxy propane, methylolated chemical compound is carbamide or urea derivative for example, and dialdehyde is maleic anhydride for example, non-methylolated urea derivative, citric acid or other polycarboxylic acid can be strengthened slurry.For environment and healthy consideration, some of these reagent are not as other.Also can by use heating or corrosion treatment for example mercerization slurry is strengthened.The example of these types of fibers comprises NHB416, and it is the chemical crosslinking southern softwood pulp fibres that has strengthened wet modulus, can obtain from the Weyerhaeuser company of the Tacoma of Washington state.Other useful slurry is also can be from the loosen slurry (NF405) and the non-slurry (NB416) of loosening of Weyerhaeuser company acquisition.The HPZ3 of the Bucheye Technologies company of the Memphis of tennessee,USA has that fiber is additional to be done and wet strength and elasticity are produces the chemical treatment of curling and twisting except giving.Other suitable slurry is a Buckeye HP2 slurry, is exactly the IP Supersoft of Internetional Paper Corporation in addition.Suitable rayon fiber is the 1.5 denier Merge18453 fibers that the Acordis CelluloseFivers Incorporated of the Alabamian Axis of the U.S. produces.

Being used for superabsorbent thing of the present invention can select from the kind apoplexy due to endogenous wind based on chemical constitution and physical form.These comprise have low gel strength, the superabsorbent thing of high-gel strength, surface-crosslinked superabsorbent thing, even crosslinked superabsorbent thing perhaps has the superabsorbent thing of the crosslink density of variation on total.The superabsorbent thing can include but are not limited to acrylic acid based on chemical property, isobutene ./maleic anhydride, poly(ethylene oxide), carboxy-methyl cellulose, polyethylene pyrrollidone, and polyvinyl alcohol.The speed range of superabsorbent thing is from slowly to soon.The superabsorbent thing can be foam, macropore or aperture granule or fiber, but villous or fibrous coating or form.The superabsorbent thing can have the shape of band shape, granule, fiber, sheet or film.The superabsorbent thing can have all lengths and diameter and distribution.The superabsorbent thing can have neutralization in various degree.By using counter ion counterionsl gegenions; For example Li, Na, K, Ca produce neutralization.

Material of the present invention can comprise the superabsorbent thing of the above-mentioned type.The example of these superabsorbent things can be obtained by (Greensboro's of North Carolina) Stockhausen company, and is labeled as FAVOR  880.The example of the superabsorbent thing of these types that obtain from (Canadian Alberta's) CamelotTechnologies Ltd. is appointed as FIBERDRI  1241 and FIBERDEI  1161.The example of the superabsorbent thing of these types that obtained by (Grimsby's of Britain) TechnicalAbsorbents Ltd. is appointed as OASIS  101 and OASIS  111.Other example that is included in these type superabsorbent things can be appointed as FLOSROB  60 LADY  from what (Illinois d Alington's) Chemdall International obtained.Other example that is included in these type superabsorbent things can obtain from the Sumitomo Seika of Japan, and is appointed as SA60N Type2.

The binding agent that the typical case uses in these structures helps to provide mechanical integrity and stability.Binding agent comprises fiber, liquid or can be by heat activated other bonder.Included preferred fiber is those fibers polyolefine fiber for example with relative fusing point.Low-melting polymer is provided at the ability that under the heating state fabric is bonded together at the fiber intersection points place.In addition, have the fiber of low melt polymer, resemble conjugation and biconstitutent fibre and be fit to the present invention.Fiber with low melt polymer is commonly referred to " fusible fibers "." low melt polymer " is meant that those have the glass transition temperature that is less than about 175C.It should be noted that the glass transition temperature by selective polymer, the quality that absorbs paper web can change to hard from softness.Exemplary binder fibre comprises the conjugate fibre of polyolefin, polyamide and polyester.Three kinds of suitable binder fibres are core-skin conjugate fibres, it can be called T-255 and T-256 or copolyester title with name from (Charlotte's of North Carolina) KoSa Inc. and obtain, although can use the known many suitable binder fibres of those of ordinary skill in the art, and can be from for example Chisso and the Fibervisions LLC acquisition of the Wilmington of Delaware, USA of many manufacturers.KoSa has developed a kind of suitable polyester binding fiber and has used as core-skin, and is known as title T254 (low melt CoPET).Suitable liquid adhesive is can be from the KYMENE  557LX of Fibervisions LLC acquisition.Other suitable liquid adhesives comprise ethylene-vinyl acetate fat liquor polymer, this polymer is sold by (Bridgewater's of N.J.) National Starch and Chemical Company, and trade mark is called Dur-O-Set  ELITE  series (comprising ELITE  33 and ELITE  32).Air Products Polymers and Chemicals sells other suitable binder fibres, and name is called AIRFLEX .

In case produce, paper web must enough be stablized and be firm so that keep its shape.The combination of the fusible fibers of q.s and heat bonding subsequently is to obtain enough method for optimizing of stability.It is enough bonding to believe that this method allows on the center of thick material and surface thereof.

As mentioned above, the coating of this system and suction/Distribution Layer are co-apertured at least, set up a kind of structure like this, and this structure allows fluid to suck fast and the suction on the appointment absorbed layer.Other layers may be selected to be co-apertured or co-apertured with coating and suction/Distribution Layer, perhaps not co-apertured mutually.Therefore the co-apertured permeability that improves material of coating and absorption system has reduced the fluid inhalation rate.Run through all layer holes that produces and also set up necessary passage, so that fluid is absorbed under high or the condition of shoving in the preferred layer for fluid.This provides the balance of the absorption of fluids on X-Y and the Z direction, and wherein the Y direction is the direction from the back of product, and the Z direction is perpendicular to the Z direction and be the direction that enters product, and directions X is perpendicular to the direction of Y and Z direction.Make that layer is simultaneously co-apertured also to provide structural integrity greatly to system.

The shape of each layer do not think to of the present invention successfully be strict.But, it should be noted that air lay suction/Distribution Layer and absorbent cores or retain layer also to be merged into a rectangular strip geometry reduced in size, to prevent that for example, fluid wicked into the pad edge when feminine hygiene was used.The shape that retains layer can be identical or different with the shape of other layers, and can have rectangle, infundibulate, runway shape or other shapes.In addition, also can to retain and/or other layers increase cotton ginning with the globality of enhancement layer.Can only form in product center co-apertured so that strengthen the function of product in the target area and the visible signal of the residual life of product be provided to user.Replacement scheme is, product can be on its whole dimension or co-apertured on the regional area.

The usable surface activating agent is handled coating to improve its wettability.This surfactant can be placed on the whole pad in particular area or zone or be mixed into fibrous inside.To this last embodiment, if this material carries out Kong Kaizhen with hot pin, can apply enough heat so that surfactant " expansion " or shift to the outer surface of fiber, set up the humid region around the hole and therefore improve the suction characteristic of material.The example of the chemicals that can use from the teeth outwards can include but are not limited to trade mark (the ICI Surfactants of the Wilmington of Delaware, USA produces) by name AHCOVEL , (the Henkel Corporation of Chemical ' the s Group of the Cincinnati of Ohio, USA produces) GLUCOPON , (BASF of Germany produces) PLURONICS , (the Union Carbide Corporation of the Danbury of Connecticut, USA produces) TRITON  X-102, those chemicals that (. the PPG Industries of the Gurnee of Illinois, USA produces) MASILSF-19  sells, or their mixture.

Design consideration optional fluid transfer delay layer of the present invention is so that be transferred to from suctions/Distribution Layer and retain layer, the distribution in the enhancing x-y plane by postponing fluid.Under high pressure transfer delay layer allows fluid to be transferred to and retains layer, high turnover rate or saturated level occur.This controlled transport sector elongated stained pattern in causing retaining in the layer helps prevent the satiety in stained district and can be the visible signal that the wearer provides the remaining life of product that indication reduces.

By preventing the close contact between the layer of retaining in suction/Distribution Layer and underlying, transfer delay layer provides permeability and wettability gradient between this is two-layer.Therefore, transfer delay layer should have low relatively permeability and wettability, and it will impel the distribution of the lateral fluid in the suction/Distribution Layer under the Continuous Flow condition like this, and the fluid of therefore controlling on the Z-direction moves.Yet under the condition of shoving, the hole in the transfer delay layer allows fluid immediately by arriving the layer that retains of underlying.Wettability by above-mentioned coating used typical chemical treatment can change transfer delay layer.

Another embodiment of the present invention can comprise and constitute the multiwalled co-apertured of absorbent cores, therefore allows fluid to move and absorbs preferred gas producing formation and improve absorption of fluids.This has increased the utilization ratio of absorbing material, and sets up different absorption patterns.

Example below producing and testing is to determine the improvement amount that example was provided according to system of the present invention.

Example 1:

The layer that describes below is cut into 4 inches and takes advantage of 4 inches sheet and be placed on the top of each other with described order, and does not use binding agent.

Coating: the polypropylene spun-bonded supatex fabric of 20.3gsm (0.6osy) ESCORENE  PD-3445 that contains the fiber of 3.5dpf.The AHCOVEL  surfactant that typically applies 0.3% percent by volume is handled.

Suction/Distribution Layer: the NB416 slurry of 90% percentage by weight and the KoSaT-255 binder fibre of 10% percentage by weight, 250gsm, the density of 0.14g/cc.

Transfer delay layer: 27.1gsm (0.8osy), the polypropylene spun-bonded supatex fabric of 2.8dpf ESCORENE  PD-3445 contains the AHCOVEL  surfactant of 0.3% percent by volume.

Absorbed layer: the NB416 slurry of 90% percentage by weight and the KoSa T-255 binder fibre of 10% percentage by weight, 175gsm, 0.10g/cc.

Example 2:

Coating: the polypropylene spun-bonded supatex fabric of 20.3gsm (0.6osy) ESCORENE  PD-3445 that contains the fiber of 3.5dpf.The AHCOVEL  surfactant that typically applies 0.5% percent by volume is handled.

Example 3:

The layer that describes below is cut into 4 inches and takes advantage of 4 inches sheet and be placed on the top of each other with described order, and does not use binding agent.Use porcupine roller and other (recessed) rollers also only to make coating and suction/Distribution Layer co-apertured, cause having 14% hole aperture area of 8 hole/square centimeters with the pin hole opening technology.Under the speed of 40 feet per minute clocks, used temperature is 280 °F (138 ℃) on porcupine roller, is 170 °F (77 ℃) on recessed roller.

Example 4:

Table 1

Example	Respiratory time (second)	Moistening again (gram)
Example	Respiratory time (second)	Moistening again (gram)	????1	????103	????0.11
????2	????75	????0.13	????1	????103	????0.11
????2	????75	????0.13	????3	????50.5	????0.12
????4	????33.5	????0.23	????3	????50.5	????0.12

As above shown in the table 1, increase the respiratory time of the surface-active contents minimizing absorption system on the non-woven fabric.And, make the co-apertured respiratory time that reduced more of layer.Mixture and co-apertured layer with high surfactant level have strengthened this efficient.

Example 5:

These assimilate prototypes are equipped with the coating binding agent with 2-3gsm interpolation level, form Kotex  Ultrathin Maxi product with SafetyZone , and it is sold at American market now.

Coating: the polypropylene spun-bonded supatex fabric of 20.3gsm (0.6osy) ESCORENE  PD-3445 that contains the fiber of 3.5dpf.The AHCOVEL  surfactant that typically applies 0.3% percent by volume is handled.This coating is 8cm * 24.2cm.

Suction/Distribution Layer: the NB416 slurry of 90% percentage by weight and the KoSaT-255 binder fibre of 10% percentage by weight, 250gsm, the density of 0.14g/cc.This layer is that 10.2cm takes advantage of 19cm.

Transfer delay layer: 27.1gsm (0.8osy), the polypropylene spun-bonded supatex fabric of 2.8dpf ESCORENE  PD-3445 contains the AHCOVEL  surfactant of 0.3% percent by volume.This layer is that 5cm takes advantage of 20.5cm.

Absorbed layer: the NB416 slurry of 90% percentage by weight and the KoSa T-255 binder fibre of 10% percentage by weight, 175gsm, 0.10g/cc.This layer is that the wide 21.5cm of taking advantage of of 6.4cm is long.

Example 6:

These absorb prototype the coating binding agent with 2-3gsm interpolation level are housed, and form Kotex  Ultrathin Maxi product with SafetyZone , and it is sold at American market now.Use porcupine roller and other (recessed) rollers also only to make coating and suction/Distribution Layer co-apertured, cause having 14% hole aperture area of 8 hole/square centimeters with the pin hole opening technology.Under the speed of 40 feet per minute clocks, used temperature is 280 °F (138 ℃) on porcupine roller, is 170 °F (77 ℃) on recessed roller.

Coating: the polypropylene spun-bonded supatex fabric of 20.3gsm (0.6osy) ESCORENE  PD-3445 that contains the fiber of 3.5dpf.The AHCOVEL  surfactant that typically applies 0.5% percent by volume is handled.This coating is 8cm * 24.2cm.

Absorbed layer: the NB416 slurry of 90% percentage by weight and the KoSa T-255 binder fibre of 10% percentage by weight, 175gsm, 0.10g/cc.This layer is that 6.4cm takes advantage of 21.5cm.

The product backing is the film layer that retains the 0.6mils of device as fluid.Hotmelt with 20gsm is connected to absorbed layer with this layer.Backing layer be 8cm wide * 24.2cm is long.

Example 7:

These absorb prototype the coating binding agent with 2-3gsm interpolation level are housed, and form KOTEX  MAXI  product with SAFETYZONE , and it is sold by Kimberly-Clark company at American market now.

Coating: the polypropylene spun-bonded supatex fabric of 20.3gsm (0.6osy) ESCORENE  PD-3445 that contains the fiber of 3.5dpf.The AHCOVEL  surfactant that typically applies 0.3% percent by volume is handled.Coating is wide 8cm and the wide 9cm of teat in the target area, with duration 22.0cm.

Suction/Distribution Layer: the NB416 slurry of 90% percentage by weight and the KoSaT-255 binder fibre of 10% percentage by weight, 250gsm, the density of 0.14g/cc.This layer is that 9.4cm takes advantage of 15.6cm.

Transfer delay layer: 27.1gsm (0.8osy), the polypropylene spun-bonded supatex fabric of 2.8dpf ESCORENE  PD-3445 contains the AHCOVEL  surfactant of 0.3% percent by volume.The wide 4.8cm of this layer, long 20.0cm.

Absorbed layer: the NB416 slurry fine hair that air-flow is shaped, 430gsm and 0.07g/cc, the while is wide 6.0cm and the wide 7.0cm of product teat in the target area, long 20.0cm.

Second assimilate: the NB416 slurry fine hair that air-flow is shaped, the density of 400gsm and 0.09g/cc has the wide and 16.0cm length of 4.5cm simultaneously.

The product backing is the polyethylene film layer that retains the 1.1mils of device as fluid.Hotmelt with 40gsm is connected to absorbed layer with this layer.Backing layer is wide 8cm in the target area, and the wide 9cm of product teat, with duration 22cm.

Example 8:

Use porcupine roller and other (recessed) rollers also only to make coating and suction/Distribution Layer co-apertured, cause having 14% hole aperture area of 8 hole/square centimeters with the pin hole opening technology.Under the speed of 40 feet per minute clocks, used temperature is 280 °F (138 ℃) on porcupine roller, is 170 °F (77 ℃) on recessed roller.

Coating: the polypropylene spun-bonded supatex fabric of 20.3gsm (0.6osy) ESCORENE  PD-3445 that contains the fiber of 3.5dpf.The AHCOVEL  surfactant that typically applies 0.5% percent by volume is handled.Coating is wide 8cm and the wide 9cm of coign in the target area, with duration 22.0cm.

Transfer delay layer: 27.1gsm (0.8osy), the polypropylene spun-bonded supatex fabric of 2.8dpf ESCORENE  PD-3445 contains the AHCOVEL  surfactant of 0.3% percent by volume.This layer is that 9.4cm takes advantage of 15.6cm.

Result of the test according to the above-mentioned material of absorption shown in above-mentioned and the test of rewetting profit is presented in the table 2.

Table 2

Example	Respiratory time (second)	Moistening again (gram)
Example	Respiratory time (second)	Moistening again (gram)	????5	????67.17	????0.13
????6	????33.52	????0.16	????5	????67.17	????0.13
????6	????33.52	????0.16	????7	????113	????0.09
????8	????41.11	????0.09	????7	????113	????0.09

From these results as seen, the stained soak time of the co-apertured demonstration single of material is significantly reduced, and can not influence wetting value again.The inventor believes that by such system is provided, this system will provide soak time faster, reduce fluid from the spilling of coating, and this has also reduced fluid and has caused the chance that its leaks through lining wicking and user health.

The co-apertured of different product layer makes key-course distribution of Products Development personnel energy or absorption fluids to a certain degree.Table 3 provides the fluid of example 5-8 to distribute test data, the fluid percentage ratio that retains in every layer of this data show.(example 6 and 8 is co-apertured).

Table 3

Example	The fluid that retains in the suction/Distribution Layer	The fluid that retains in first absorbed layer	The fluid that retains in second absorbed layer
Example	The fluid that retains in the suction/Distribution Layer	The fluid that retains in first absorbed layer	The fluid that retains in second absorbed layer	????5	????72.14	????27.85	????N/A
????6	????47.35	????52.64	????N/A	????5	????72.14	????27.85	????N/A
????6	????47.35	????52.64	????N/A	????7	????71.36	????23.55	????5.08
????8	????56.20	????31.70	????12.06	????7	????71.36	????23.55	????5.08

Data from table 3 as seen, co-apertured system allows to make fluid can further leave coating to low absorbed layer distributing fluids preferably, like this generation concerning the wearer than dry surface and more effective whole absorbability of utilizing product.Fluid Volume in the compound relatively absorbed layer of suction/Distribution Layer can be expressed as a ratio, in this case, is the fluid separation rate.The fluid separation rate of material according to the invention should be between 70/30 and 20/80, perhaps better between 60/40 and 20/80.

Obviously, raw-material selection and by the how how good enforcement of the selection of co-apertured layer decision product.One of them zone of the present invention shows that benefit is to be near in the system with higher density assimilate of coating.This system provides the elasticity of product, with pack and the distortion between the minimizing operating period, and is tending towards priority allocation fluid on X-Y plane.This allows more effective absorption of repeated pollution.

Those of ordinary skill in the art is the product of the imagination with different materials density and absorption characteristic easily, and it can acquire benefit from selected layer co-apertured and absorb faster and fluid retains so that have in the favored area of product.Can be different layers designs co-apertured structure and moves with the fluid that improves entire product.

Other examples, wherein coating and absorbed layer are co-apertured, can see in the example of back:

Example 9:

Coating: the polypropylene spun-bonded supatex fabric that contains the 20.3gsm (0.6osy) of the fiber of 3.5dpf.The AHCOVEL  surfactant that typically applies 0.3% percent by volume is handled.

Suction/Distribution Layer: the NB416 slurry of 90% percentage by weight and the KoSaT-255 binder fibre of 10% percentage by weight, 175gsm has the density of 0.14g/cc.This layer has the wide and 37cm length of 19.0cm.

Transfer delay layer: 27.1gsm (0.8osy), the polypropylene spun-bonded supatex fabric of 2.8dpf ESCORENE  PD-3445 contains the AHCOVEL  surfactant of 0.3% percent by volume.This layer has 20.6cm and 4.8cm is long.

Absorbed layer: the NB416 slurry fine hair that air-flow is shaped, 500gsm and 0.09g/cc, with duration 20.6cm, wide 4.8cm.Have the following fine hair of 600gsm basic weight and 0.09g/cc density, it has the length of 29.5cm, in 6.5cm not lend oneself to worry and anxiety and at the wide 7.5cm of teat.

The product backing is the polyethylene film layer that retains the 1.1mils of device as fluid.Hotmelt with 40gsm is connected to absorbed layer with this layer.Backing layer is wide 8.5cm in the target area, at the wide 9.5cm of teat, long 31.5cm.

Example 10:

Use porcupine roller and other (recessed) rollers only to make coating and suction/Distribution Layer co-apertured, cause having 14% hole aperture area of 8 hole/square centimeters with the pin hole opening technology.Under the speed of 40 feet per minute clocks, used temperature is 280 °F (138 ℃) on porcupine roller, is 170 °F (77 ℃) on recessed roller.

Coating: the polypropylene spun-bonded supatex fabric of 20.3gsm (0.6osy) that contains the fiber of 3.5dpf.The AHCOVEL  surfactant that typically applies 0.3% percent by volume is handled.

Suction/Distribution Layer: the NB416 slurry of 90% percentage by weight and the KoSaT-255 binder fibre of 10% percentage by weight, 175gsm has the density of 0.14g/cc.This layer 19.0cm is wide, and 37cm is long.

Transfer delay layer: 27.1gsm (0.8osy), the polypropylene spun-bonded supatex fabric of 2.8dpf ESCORENE  PD-3445 contains the AHCOVEL  surfactant of 0.3% percent by volume.This layer has the length of 20.6cm and the width of 4.8cm.

Absorbed layer: the NB416 slurry fine hair that air-flow is shaped, 500gsm and 0.09g/cc have the length of 20.6cm simultaneously, with the width of 4.8cm, and have the 600gsm basic weight, have the following tapetum of 0.09g/cc density, this layer 29.5cm is long, and 6.5cm is wide at the center, and 7.5cm is wide on teat.

The product backing is the polyethylene film layer that retains the 1.1mils of device as fluid.Hotmelt with 40gsm is connected to absorbed layer with this layer.Backing layer is wide 8.5cm and at the wide 9.5cm of teat, with duration 31.5cm in the target area.

Example 11:

Surge layer: with the polypropylene spun-bonded supatex fabric polypropylene fibre of 23.7gsm (0.7osy) the 6dpf Escorene  PD-3445 paper web of HR6 finishing.Repairing used fiber can obtain from ChissoCorp..It is wide that this layer has 19.0cm, and 37cm is long, and thick 1.3mm.

The product backing is the polyethylene film layer that retains the 1.1mils of device as fluid.Hotmelt with 40gsm is connected to absorbed layer with this layer.Backing layer is wide 8.5cm and the wide 9.5cm of product teat in the target area, with duration 31.5cm.

Example 12:

Use porcupine roller and other (recessed) rollers to make suction/Distribution Layer and transfer delay layer co-apertured, cause having 14% hole aperture area of 8 hole/square centimeters with the pin hole opening technology.Under the speed of 50 feet per minute clocks, used temperature is 280 °F (138 ℃) on porcupine roller, is 170 °F (77 ℃) on recessed roller.

Coating: the polypropylene screen of vacuum perforate has 17% open area, 100 holes/cm ², 19gsm.

Suction/Distribution Layer: the NB416 slurry of 90% percentage by weight and the KoSaT-255 binder fibre of 10% percentage by weight, 175gsm has the density of 0.14g/cc.This layer has 19.0cm width and 37cm length.

Absorbed layer: the NB416 slurry fine hair that air-flow is shaped, 500gsm and 0.09g/cc have the length of 20.6cm simultaneously, with the width of 4.8cm, and have the 600gsm basic weight, have the following tapetum of 0.09g/cc density, this layer 29.5cm is long, and 6.5cm is wide in the target area, and 7.5cm is wide at teat.

Above-mentioned example stands the test according to three layers of suction and the test of rewetting profit, and the result is presented in the table 4.

Table 4

Example	For the first time stained respiratory time (second)	For the second time stained respiratory time (second)	Stained for the third time respiratory time (second)	Moistening again (gram)
Example	For the first time stained respiratory time (second)	For the second time stained respiratory time (second)	Stained for the third time respiratory time (second)	Moistening again (gram)	????9	????43	????58	????132	????0.45
????10	????41	????49	????98	????0.19	????9	????43	????58	????132	????0.45
????10	????41	????49	????98	????0.19	????11	????8	????13	????23	????0.15
????12	????12	????17	????24	????0.03	????11	????8	????13	????23	????0.15

From these examples as seen: under repeatedly stained situation, the co-apertured advantage that reduces the material respiratory time that shown of coating and different absorbed layers.In example 10, for example, the further optimization of useful aperture area, and can handle so that further reduce the respiratory time of system.Also can find out to have the material of big void volume in the coating and have respiratory time faster when repeatedly stained usually in these data, this shows that comparing respiratory time with no perforate absorption system significantly reduces.

As persons of ordinary skill in the art may appreciate that and to consider the present invention is carried out modifications and variations in the limit of power of those ordinarily skilled in the art.The inventor is intended to these modifications and variations within the scope of the present invention.

Claims

1, a kind of system that is used for health product, it comprises a coating, and coating is adjacent with a suction/Distribution Layer, and this suction/Distribution Layer is adjacent with an absorbent cores on a side relative with described coating, and wherein, described coating and suction/Distribution Layer are co-apertured.

2, system according to claim 1 is characterized in that, this system also comprises the transfer delay layer between described suction/Distribution Layer and described absorbent cores.

3, system according to claim 1 is characterized in that, this system has 2% to 25% open area, and has area less than 19.6mm ²Opening.

4, system according to claim 3 is characterized in that, this system has and is lower than 35 seconds the 3rd stained respiratory time.

5, system according to claim 3 is characterized in that, this system has the wetting value again less than 0.3 gram.

6, system according to claim 1 is characterized in that, described suction/Distribution Layer have between 50 and 500gsm between basic weight.

7, system according to claim 1 is characterized in that, handles described clad material with wettable surfactant.

8, system according to claim 1 is characterized in that, with making the described clad material of the good additive treating of dermal sensation.

9, system according to claim 1 is characterized in that, described clad material is the cotton ginning supatex fabric.

10, system according to claim 1 is characterized in that, described system has the fluid separation rate between 60/40 and 20/80.

11, a kind of feminine hygiene pads, it comprises non-woven coating, suction/Distribution Layer and absorbed layer, wherein, described coating and suction/Distribution Layer are co-apertured.

12, pad according to claim 11 is characterized in that, it also comprises the transfer delay layer of contiguous described absorbent cores.

13, pad according to claim 12 is characterized in that, described transfer delay layer is the material of selecting from the group that nonwoven fabric, meltblown fabric, carded webs and film constitute.

14, pad according to claim 11 is characterized in that, described transfer delay layer be basic weight between about 15 and 50gsm between nonwoven fabric.

15, pad according to claim 11 is characterized in that, described suction/Distribution Layer is from airlaid fabric, bonded carded paper web, is total to the material of selecting the group of moulding material, water entanglement slurry fabric and meltblown fabric formation.

16, pad according to claim 11 is characterized in that, described suction/Distribution Layer be basic weight between about 100 and 300gsm between, and density between about 0.06 and 0.18g/cc between airlaid fabric.

17, pad according to claim 11 is characterized in that, described coating, suction/Distribution Layer and transfer delay layer are co-apertured, and hole density is between about 1 and 15 hole/square centimeters.

18, pad according to claim 11 is characterized in that, it also is included in the surge layer between described coating and the suction/Distribution Layer.

19, pad according to claim 18 is characterized in that, described coating, surge layer and suction/Distribution Layer are co-apertured, and hole density is between about 1 and 15 hole/square centimeters.

20, a kind of feminine hygiene pads, it comprises the coating of a polypropylene fibre supatex fabric, suction/the Distribution Layer of slurry and binder fibre, this suction/Distribution Layer have between about 0.09 and 0.19g/cc between density and between about 100 and 300gsm between basic weight, the transfer delay layer of a supatex fabric, one first absorbed layer, this first absorbed layer comprise density between about 0.05 and 0.10g/cc between and basic weight between 150 and 500gsm between slurry fine hair, with one second absorbed layer, this second absorbed layer comprises that slurry fine hair and density are less than described first absorbed layer, wherein, described layer is co-apertured, and hole density from 1 to 15 hole/square centimeter.