CN1268039A

CN1268039A - Absorbent article with multi-layered extensible wings

Info

Publication number: CN1268039A
Application number: CN98808400A
Authority: CN
Inventors: 丽贝卡·W·帕特森; 托马斯·W·奥斯本第三; 迈克尔·N·赫什伯格; 莱斯利·威尔金斯
Original assignee: Procter and Gamble Co
Current assignee: Procter and Gamble Co
Priority date: 1997-06-30
Filing date: 1998-06-30
Publication date: 2000-09-27
Also published as: ID28186A; ZA985679B; BR9810382A; TW409052B; CA2295051A1; AU8272498A; WO1999000093A1; EP0993294A1; KR20010014405A; JP2002508693A

Abstract

Absorbent articles for wearing in an undergarment, such as sanitary napkins panty liners, incontinence pads, and the like, which have wings (or side flaps) are disclosed. The absorbent articles typically have a liquid pervious topsheet, a liquid impervious backsheet joined to the topsheet, and an absorbent core positioned between the topsheet and backsheet. In one embodiment, the flaps are comprised of extensions of the topsheet and backsheet. The extensions of the topsheet and backsheet are provided with extensible portions therein. At least portions of the extensible portions of the topsheet and backsheet are located inboard of the longitudinal side edges of the absorbent core of the absorbent article.

Description

The absorbent device that has multi-layered extensible wings

Invention field

The present invention relates to a kind of absorbent device, for example sanitary towel, smallclothes liner, incontinence etc.Or rather, the present invention relates to a kind of extending and also preferably can be on a plurality of directions the absorbent device of the above-mentioned type of elastic elongation.

Background technology

Resembling the such absorbent device of sanitary towel, panty liners and incontinent person's liner all is designed to absorb and to keep liquid and other Excreta from human body is discharged also can prevent make dirty health and medicated clothing.Sanitary towel is a kind of absorbent device that is worn by the women, and this articles for use are placed between wearer's two lower limbs usually near on the position of human body perineal region.

In general, most of above-mentioned various disposable absorbent articles all are to make with the material that can not extend.That is to say that under the power effect that the absorbent device of being worn normally stands, material (and articles for use itself) can not extend.

Absorbent device can not extend and make this articles for use have some very important disadvantages.One of important disadvantages is that they can not provide enough comfortable sensation to the wearer.In theory, the wearer should be able to perceive the difference between absorbent device that can extend to become to be fit to wearer's body and move with the wearer and the absorbent device that can not extend.Conventional sanitary towel can not extend and move with wearer's underwear, can make sanitary towel produce skew like this in underwear.Provide the elongation performance will make sanitary towel to be fit to wearer's underwear better and be on the suitable position to sanitary towel.

Some patent disclosure publications disclose the absorbent device with multiple parts that can extend.These achievements have been disclosed in the United States Patent (USP) 2701567 of authorizing Smith, authorize the United States Patent (USP) 3570493 of Olsson, authorize people's such as Easley United States Patent (USP) 3653382, authorize the United States Patent (USP) 3717150 of Schwartz, authorize people's such as Sabee United States Patent (USP) 4013816, authorize the United States Patent (USP) 4041949 of Kozak, authorize the United States Patent (USP) 4166464 of Korpman, authorize the United States Patent (USP) 4533357 of Hall, authorize people's such as Pieniak United States Patent (USP) 4573991, authorize the United States Patent (USP) 4578070 of Holtman, authorize people's such as Jackson United States Patent (USP) 4596570, authorize people's such as Morman United States Patent (USP) 4655760, authorize the United States Patent (USP) 4731066 of Korpman, authorize people's such as Fahrenkrug United States Patent (USP) 4847134, authorize people's such as Fahrenkrug United States Patent (USP) 4891258, authorize the United States Patent (USP) 4965122 of Morman, authorize the United States Patent (USP) 4992324 of Dube, authorize people's such as Gossens United States Patent (USP) 5011480 and with among the disclosed european patent application 0450541A2 of people's such as Morris name.

Some public publications of listing above disclose some and have had the absorbent device of one or more extensible member.Authorize recently the various embodiments that disclose absorbent device such as sanitary towel in people's such as Osborn the United States Patent (USP) that is entitled as " extensible absorbent articles " 5611790 on March 18th, 1997, these moisture absorptions with fully by extending to adapt to the motion of wearer and wearer's underwear.The improvement material that is used for absorbent device has also obtained exploitation.

For example, authorized on May 21st, 1996 and disclose a kind of Web materials that demonstrates the elastic-like characteristic in people's such as Chappell the United States Patent (USP) 5518801 that is entitled as " Web materials that demonstrates the elastic-like characteristic " and with the absorbent device of this material.Authorized on October 1st, 1996 in people's such as Dragoo the United States Patent (USP) 5560878 that is entitled as " method and apparatus of preparation extensible absorbent articles " and disclose a kind of extending absorbing material.Relate to a kind of tensile absorbent device with the PCT public publication WO95/20931 of people's such as Osborn nominal disclosed being entitled as " absorbent device " August 10 nineteen ninety-five, and this articles for use have the improvement structure of the Body contact that keeps articles for use and wearer.Yet, also proceeding in the research that improves various extensible absorbent articles and be used for aspect the absorbent article core of this absorbent device.

Therefore, the purpose of this invention is to provide a kind of improved absorbent device, sanitary towel for example, this absorbent device can extend, but or the absorbent device of elastic elongation more preferably.

Another object of the present invention provides a kind of absorbent device, sanitary towel for example, and this absorbent device can have elastic elongation on a plurality of directions.

Another object of the present invention provides a kind of extensible absorbent articles with improved structure, be used to prevent influence some problems of the absorbent device of highly flexible, the end regions of for example not wishing the absorbent device that occurs folds into trend on the remainder of absorbent device etc.

Another object of the present invention provides a kind of extensible absorbent articles with diagonal angle extensibility, so that when adapting on the underwear that absorbent device is fixed to the wearer, walks and similar motion is applied to power on the absorbent device.

Another object of the present invention provides the improved absorbent article core that a kind of extensible absorbent articles is used.

Another object of the present invention provide a kind of have flank or flap absorbent device, have extending part on the described flank, this extending part is used to alleviate the stress in the sanitary towel when flank wraps in around wearer's underwear edge.

A further object of the present invention provides a kind of extensible absorbent articles with extending corrugated the sealing (crimp seal) of improving type, described extending corrugated each extensible member of sealing absorbent device links together, but still allows them to stretch.

Considering following explanation and in conjunction with the accompanying drawings the time, will make these and other objects of the present invention become more apparent.

Summary of the invention

But the invention provides a kind of absorbent device that can multidirectionally extend, be preferably elastic elongation that is worn in the underwear, for example sanitary towel, smallclothes liner, incontinence etc.

Absorbent device that can multidirectional elongation has longitudinal midline, transversal centerline, a pair of vertical lateral margin, pair of end portions edge, first petiolarea, second petiolarea and the central area between first and second petiolareas.Absorbent device that can multidirectional elongation preferably has main part, this part is made of at least two zones that can extend in different directions, at least one zone in these zones is preferably two or more zones and can produces 25% elongation under the effect of power that is less than or equal to about 500 grams.The main part of absorbent device that can multidirectional elongation preferably include can multidirectional elongation saturating liquid top flat, local at least along periphery link to each other with top flat can multidirectional elongation the liquid-tight egative film and between top flat and egative film can multidirectional elongation absorbent article core.

The main part of absorbent device that in a preferred embodiment, can multidirectional elongation has the mesozone that mainly can extend in the horizontal.First and second petiolareas preferably respectively comprise three extending zones: first zones of extensibility, second zones of extensibility and the 3rd zones of extensibility.First zones of extensibility of petiolarea is provided with near ora terminalis edge to a small part longitudinal midline of main part.First zones of extensibility mainly can extend in the horizontal.Second zones of extensibility is arranged on the side of described first zones of extensibility in the lateral outer side of part first zones of extensibility at least, and extends towards a vertical lateral margin of absorbent device.Second zones of extensibility can extend on the direction between the vertical and horizontal.The 3rd zones of extensibility is arranged on the opposite side of first zones of extensibility in the lateral outer side of part first zones of extensibility at least.The 3rd zones of extensibility extends towards another vertical lateral margin of absorbent device, and can extend on the direction between the vertical and horizontal.

In present embodiment or other embodiment, absorbent device that can multidirectional elongation is provided with flank or flap, and described flank or flap laterally extend outwardly into outside vertical lateral margin of absorbent device main part.Described flank has improved structure division, and when when the flank bag is around the lateral margin of wearer's underwear, thereby these parts can be extended and eliminated the stress on the flank.Or rather, flank and main part form one, and it has extensibility in the edge of the absorbent article core that is positioned at absorbent device area inside.Flank described here is used for also belonging to scope of the present invention on the conventional not extending absorbent device.

In addition, the parts that constitute extensible absorbent articles preferably keep together by the novel liquid impervious seal that use has a sinusoidal configuration, but described sinusoidal configuration makes the parts elastic stretch.

Brief Description Of Drawings

Fig. 1 is the top plan view of the preferred embodiment of sanitary towel of the present invention.

Fig. 2 is along the transverse cross-sectional view of the line 2-2 among Fig. 1 by a flank angular region intercepting of sanitary towel.

Fig. 3 is along the transverse cross-sectional view of the line 3-3 among Fig. 1 by the central area intercepting of a flank.

Fig. 4 is the upward view of sanitary towel shown in Fig. 1, and for simplicity, this shown figure has omitted the deformable webbed region on the egative film.

Fig. 5 is the simplified plan view of the sanitary towel after the elongation.

Fig. 6 is flexible and diagrammatic side view tensile sanitary towel, if its expression is not provided with improvement feature of the present invention, and some problems that sanitary towel may occur.

Fig. 7 is the top plan view according to preferred composite sanitary napkin of the present invention.

Fig. 8 is the profile of the composite sanitary napkin shown in Fig. 7 of getting of 8-8 along the line, and for simplicity, the ripple in not shown in the drawings top flat and the egative film.

Detailed description of the present invention

Fig. 1-4 shows a kind of preferred embodiment of disposable absorbent article of the present invention.The present invention relates to be through the absorbent device in the underwear, for example sanitary towel, smallclothes liner, incontinence etc.

Used herein term " absorbent device " is meant the articles for use that absorb and keep body excretions.More particularly, this term refers to press close to or places, is used for the various excremental articles for use that absorb and keep discharging from human body near wearer's body.Term " absorbent device " is intended to comprise sanitary towel, smallclothes liner and incontinent person's liner (and other is through the articles for use in underwear crotch district).

Term " disposable " is meant the article that use is once promptly thrown away afterwards, and this article preferably can be recycling, the article (that is to say, do not plan these article are washed or otherwise reclaim or reuse as absorbent device) making compost or handle with the mode of other environmentally compatible.In described preferred embodiment, absorbent device is that label is 20 sanitary towel.

Term used herein " sanitary towel " is meant the articles for use that are through near the various Excretas (for example blood, menstruation and urine) that are intended to the genital area to absorb and keep discharging by the women in body.Yet the present invention is not limited to the particular types and the structure of the absorbent device shown in the figure.

Sanitary towel 20 has two surfaces, the surface of body contact or " surface " 20A and underwear surface 20B.Sanitary towel 20 shown in Fig. 1 is observed from its surface 20A.Surface 20A is the surface that will wear near wearer's body.Underwear surface 20B is near the surface that will be put into when wearing sanitary towel 20 wearer's underwear.

Sanitary towel 20 has two center lines, main longitudinal midline (or " longitudinal midline ") L and a main transversal centerline (or " transversal centerline ") T.Term used herein " vertically " is meant usually with the wearer's that stands that will wear sanitary towel 20 health and is divided equally into the two-part vertical plane in the left and right sides align straight line, axis or direction in sanitary towel 20 planes of (for example being arranged essentially parallel to described vertical plane).Term used herein " horizontal " or " edgewise " can exchange, and it is meant common straight line, axis or direction perpendicular to the plane that is positioned at sanitary towel 20 longitudinally.

As shown in fig. 1, sanitary towel 20 comprises main part 22 and two flanks 24.The main part 22 of the sanitary towel 20 shown in Fig. 1 comprises sanitary towel's part of not being with flank 24.Main part 22 has two vertical lateral margins that separate each other 26, two lateral end edges that separate each other (or " end ") 28, and they form the periphery 30 of main part jointly.Main part 22 has four angular regions 27, and vertically lateral margin 26 and ora terminalis 28 27 converge in the angular region.Main part 22 also has two petiolareas, and two petiolareas are designated as first petiolarea 32 and second petiolarea 34.Central area 36 is arranged between petiolarea 32 and 34.Petiolarea 32 and 34 is that about 1/8-of main part length is about 1/3 from the longitudinally outward extending length in the edge of central area 36, or more.In authorizing the United States Patent (USP) 4690680 of Higgins on the 1st, JIUYUE in 1987 describes the characteristic of central area and two petiolareas of sanitary towel in detail.

The main part 22 of sanitary towel 20 can be any thickness, comprises thicker, intermediate gauge, thin or even very thin (or " ultra-thin ").A kind of characteristic of not extending " ultra-thin " sanitary towel has usually been described in the United States Patent (USP) 4950264 and 5009653 of authorizing Osborn.The embodiment of sanitary towel 20 refers to a kind of example of ultra-thin sanitary towel of about 4 millimeters thick shown in the accompanying drawing 1-3.The main part 22 of sanitary towel 20 is preferably soft so that make the wearer feel pleasant.

Sanitary towel 20 shown in the accompanying drawing is tensile, and is preferably stretchable, more preferably can be on a plurality of directions elastic stretching.Term used herein " tensile " is meant that the size variable of articles for use at least one direction is big in the x-y plane.The x-y plane is the plane that is arranged essentially parallel to sanitary towel 20 surfaces.Term " extending " but comprise can stretch and the articles for use of elastic stretching.Term used herein " can stretch " and be meant that when applying tensile force on articles for use articles for use are extending and produce the articles for use of certain resistance to stretching.

Term " but elastic stretching " or " but elastic elongation " are synonyms.These terms can be described by the sanitary towel's schematic diagram among Fig. 5.As shown in Figure 5, sanitary towel 20 may be elongated to tensile elongation L _SWith stretched width W _SAs using in this article, term " but elastic stretching " or " but elastic elongation " mean, and when having removed the tensile force of representing with " F ", sanitary towel will be tending towards getting back to it and not extend or not tensile size (or " original " size) L _UAnd W _UYet sanitary towel 20 needn't get back to its not tensile size fully.Can be as shown in Figure 5, it turns back to its not stretched dimension (L _UAnd W _U) and size (or the tensile size) L of its elongation _SAnd W _SLax size (as L _RAnd W _R).

Fig. 2 shows each parts of the main part 22 of sanitary towel 20 of the present invention.The main part 22 of sanitary towel preferably includes at least three basic elements of character.They are top flats 38 of liquid, liquid-tight egative film 40 and be located at top flat 38 and egative film 40 between absorbent article core.If top flat, liquid-tight egative film and the absorbent article core of saturating liquid are as described below tensile, then they can contain multiple suitable material, or contain that this description is described to be suitable for carrying out modification so that the base material of extensibility to be provided to them.

In the embodiment shown in fig. 1, the base material of the top flat 38 of saturating liquid comprises formed film with holes.Authorized people's such as Ahr United States Patent (USP) 4463045 July 31 in 4342314,1984 and authorized on April 9th, 1991 in the United States Patent (USP) 5006394 of Baird and described suitable formed film at the United States Patent (USP) of authorizing people such as Radel on United States Patent (USP) 4324245, the August 3 nineteen eighty-two of authorizing people such as Mullane on United States Patent (USP) 3929135, April 13 nineteen eighty-two that December in 1975 was authorized Thompson on the 30th.A kind of base material of particularly preferred top flat 38 is included in the formed film described in above-mentioned one or more patent and by the Procter﹠amp of Cincinnati, Ohio; " DIR-WEAVE " top flat that Gamble company sells in sanitary towel.At production period, in the base material of top flat 38, add the hydrophilic surfactant active.The base material of top flat 38 is carried out modification so that it is extending on a plurality of directions as discussed in more detail below.

Absorbent article core 42 can constitute by having various absorbing materials extensibility or that suitable modification one-tenth has extensibility.For example, the material that is suitable as absorbent article core 42 can comprise knit materials or non-woven material, and it can modification become tensile material on a plurality of directions.Has extensibility on the extending both direction at least that is meant in the x-y plane of term used herein " multidirectional ".(it will also be appreciated that if desired, be used in material as herein described in the absorbent article core 42 and can randomly be used as absorbent article core in the disposable absorbent article of other type such as disposable diaper etc.)

A kind of suitable non-woven material that can multidirectional elastic elongation is 50/50 polymer fiber mixture, and for example polyester fiber and fiber-like form the polymeric material (or " sucting wet gel material ") of superabsorbent hydrogel.Suitable fiber-like sucting wet gel material is to economize No. 1161 product that the Camelot superabsorbent company limited of Calgary obtains from Canadian Alberta.Non-woven material preferably uses the pattern of describing in the United States Patent (USP) 4781710 of authorizing people such as Megison to carry out embossing.The preferred then non-woven material with embossing is heated to the temperature (about 280 (about 138 ℃)) that is lower than the polyester glass transition temperature slightly and authorized Hassenboehler on the 14th according to JIUYUE in 1993 subsequently, the mode of describing in people's such as Jr the United States Patent (USP) 5244482 that is entitled as " post processing of non-woven network " is carried out fixed, thereby material can be extended on first direction.

Preferably non-woven network is cooled to about 200 °F (about 93 ℃) then and carries out mechanical compress (or " micrexed ") so that it has extensibility on the second direction perpendicular to first direction.The United States Patent (USP) that the United States Patent (USP) of authorizing Walton on July 12nd, 1966 was authorized Walton on February 11 in 3260778,1969 was authorized the appropriate method of having described the mechanical compress non-woven network in people's such as Walton the United States Patent (USP) 5117540 on June 2, in 3426405,1992.Whole process can be produced nonwoven absorbent article core material, this material is being less than or equal to about 200 gram/inches (about 80 gram per centimeters), preferably be less than or equal to about 100 gram/inches (about 40 gram per centimeters), more preferably between the about 100 gram/inches of about 25-(about 40 gram per centimeters of about 10-), most preferably the power effect lower edge machine direction of about 60 gram/inches (about 24 gram per centimeters) (fabric unfolded direction from the reel in the process of production sanitary towel 20) and with the vertical direction of machine (perpendicular to unfolded direction) extending about 25%.

But the absorbent article core 42 in the accompanying drawing illustrated embodiment preferably includes the knit materials of omnidirectional's elastic elongation.Used herein term " omnidirectional " elongation is meant the extensibility on all directions in the x-y plane.In a particularly preferred embodiment, absorbent article core 42 is two-layer or the laminated member of multilamellar knit materials.Preferably, absorbent article core 42 comprises three-decker, this three-decker comprises knitting nylon material layer, knitting polyester material layer and knitting 20/1 acryhic material layer, and these material layers are stitched together by the access node (stitching) that the laminate that has the jacquard weave quilting pattern is provided.This material be production number be B7112 known products and also can be from Burlington, the Flynt Amtex company of NC obtains.The quantitative of Flynt material is 24mg/cm ², absorptive capacity is about 2mm more than or equal to about 5 gram water/gram fabrics and thickness.The simple experiment that in following test method part, will be described as determining the capacity of this material and carry out.

Preferably can be with the elongation of following amount omnidirectional at absorbent article core 42 under the following given force effect (for example Flynt material): be less than or equal under the power effect of about 20 gram/inches (about 8g/cm) and extending 5%; Elongation 10% under the power effect that is less than or equal to about 35 gram/inches (about 14g/cm); Be less than or equal to about 200 gram/inches (about 80g/cm), preferably be less than or equal to about 100 gram/inches (about 40g/cm), be more preferably less than or equaling the power effect elongation 25% down of about 85 gram/inches (about 33g/cm); Elongation 50% under the power effect that is less than or equal to about 225 gram/inches (about 90g/cm).As in following test method part will as described in, given at this all is to record with one inch (2.54cm) wide strip of absorbent material effectively.For the sake of simplicity, use longitudinally, laterally and 45 ° of rectangular omnidirectional's extensibilities of measuring downcutting on the angular direction.

Preferred absorbent article core 42 (for example Flynt material) can be on all directions elastic elongation.Eliminate after the tensile force, absorbent article core 42 can but size needn't turn back to it fully and do not extend the time.This feature can be described with the percent permanent set (%) of core material.The Flynt material is vertically, laterally and to the permanent deformation on the angular direction be less than or equal to 10%.

Preferred absorbent article core 42 (for example Flynt material) is extremely submissive and dangle.With the test of describing in the United States Patent (USP) 5009653 of authorizing Osborn the Flynt material is measured separately, the Taibo deflection of Flynt material is about 0.11 or 0.12g cm; Bending rigidity is about 26mg cm/cm; Flexing resistance is about 14 or 15 grams.One side of Flynt material is " puffy " outward appearance, and opposite side is more flat relatively.The Flynt material can be placed in the sanitary towel 20, make the one side near top flat 38.Because the absorbent article core material is originally extending on all directions, so do not need this absorbent article core material is carried out modification.

In some cases, can consider to make the Flynt material to have as the required additional absorption capacity of absorbent article core 42.This can realize with several unrestricted modes.In one embodiment, additional extensible materials net or band can be connected to the downside of Flynt material.In this embodiment, on that surface (that is its inner surface) that can in additional extensible materials net or band, place sucting wet gel material is set near the Flynt material.Therefore, additional net or band are sucting wet gel material " interception " or remain near on the position of Flynt material downside.

In the preferred styles of this embodiment, extensible materials is made of the rectangle band that wide about 2 inches (about 5cm) are about 6.25 inches (about 16cm), described rectangle band is the ventilative bonding non-woven material made from bicomponent fibre, and described bicomponent fibre is produced with the HAVIXS2146 trade name by the Havix company in Japanese GiFu city.The HAVIX material preferably has certain extensibility in one direction on its width.Resemble can multidirectional elongation in above-mentioned discussion non-woven material the time as described in, preferably the HAVIX material is carried out mechanical compress (or " micrexed ") so that it also can be extended in the vertical.Preferably sucting wet gel material is applied on the HAVIX material, described sucting wet gel material is from Naperville, Nalco 1180 sucting wet gel materials that the Nalco chemical company of IL obtains and from Williamsport, the PEGOSPERSE surfactant mixtures that the Lonza company limited of PA obtains.Preferably the ratio with about 10 gram sucting wet gel materials and about 1 gram surfactant mixes these components.Preferably this mixture of about 0.4 gram of about 0.3-is applied on the band of HAVIX material.

Can in any suitable manner the band of HAVIX material be connected to the downside of Flynt material.Preferably the HAVIX material is stretched and be connected to the downside of Flynt material with binding agent, described binding agent can be for example by Wisconsin, No. 2031 binding agents that the Findley binding agent company of Wauwatosa produces.Additional fastening can place two-sided tape the periphery of HAVIX material, so that be fixed on the Flynt material if desired.Adopting this additional web material that has sucting wet gel material that the absorptive capacity of sanitary towel 20 is doubled, is that about 12 grams are increased to about 23 grams from total capacity promptly.Preferably measure these absorptive capacities according to the test of describing in the United States Patent (USP) 5009653 of authorizing Osborn.

In other embodiments, can otherwise make absorbent article core 42 have additional capacity.For example, can not adopt above-mentioned material strips to be added to the form of absorbent article core downside, but sucting wet gel material is added on the surface of one or more layers (for example one of different layers of Flynt material) of absorbent article core.In addition, one or more layers of absorbent article core comprises the fiber sucting wet gel material in the part at least.

Egative film 40 can be any suitable liquid-tight material, and this material is tensile or comprises as described herein the base material that can modification becomes to have extensibility.The base material that preferably is suitable as egative film 40 is that thickness is the polyethylene film of 0.012mm (0.5mil)-0.015mm (2.0mil).Exemplary polyethylene film is produced by the Clopay company of Cincinnati, Ohio, and its trade mark is P18-0401 and microflex 1401.Egative film 40 can be embossed and/or be to handle so that form the outward appearance that more resembles clothes through tarnish.In addition, egative film 40 can allow steam to overflow from absorbent article core 42 (that is, egative film is gas-pervious), can prevent that again effluent from passing egative film simultaneously.In a preferred embodiment, when production is suitable as the base material of egative film 40, needs that it is carried out Corona discharge Treatment and part required on the egative film is adhered on the top flat so that help.Method with the Corona discharge Treatment thin-film material has been described in the United States Patent (USP) 4351784,4456570 and 4535020 of authorizing people such as Thomas.As will going through below, can carry out modification to the base material that is used for egative film 40 and make it and multidirectionally to extend.

Top flat 38, egative film 40 and absorbent article core 42 can be combined into known various structures in the prior art (comprise the structure of lamellated or " sandwich " and parcel or " pipe " shape structure).Fig. 1-4 shows a kind of preferred embodiment that is assembled into the sanitary towel 20 of sandwich structure, and wherein the length of top flat 38 and egative film 40 and width dimensions are generally greater than the length and the width of absorbent article core 42.Top flat 38 and egative film 40 extend to outside the edge of absorbent article core 42 to form peripheral part 30.Preferably top flat 38 is connected in the absorbent article core 42 on a side of health.For this reason, can be with the known any suitable manner that is used for this purpose in the prior art, for example the binding agent by mesh pattern is connected to top flat 38 on the absorbent article core 42.Will not be connected on the absorbent article core 42 by egative film 40, according to shown in embodiment be not preferably egative film 40 be connected on the absorbent article core 42.As will describing in detail below, preferably be connected to each other and be in the same place extending to the part that forms periphery 30 outside the edge of absorbent article core 42 in top flat 38 and the egative film 40.

Can top flat 38 be connected on the absorbent article core 42 by means of the binding agent of even successive adhesive phase, figuratum adhesive phase or some isolating straight lines, spiral type or point-like.A kind of binding agent that can satisfy this purpose that has been found that is No. 2031 binding agent by the Findley binding agent company production of Wisconsin state Wauwatosa.Preferably use binding agent, as be disclosed in as described in the United States Patent (USP) 4573986 that is entitled as " the disposable medicated clothing that holds refuse " of authorizing people such as Minetola on March 4th, 1986 with the form of the mesh pattern network of adhesive filaments.Authorized Sprague, the United States Patent (USP) 3911173 of Jr on October 7th, 1975; Authorized people's such as Ziecker United States Patent (USP) 4785996 on November 22nd, 1978; The equipment shown in the United States Patent (USP) 4842666 of Werenicz of authorizing on June 27th, 1989 has been described with method and has been comprised that several adhesive filament wire-wounds become the mesh pattern network of the another kind of exemplary adhesive filaments of spiral pattern.In addition, can each parts of sanitary towel be connected together by known heat bonding in the prior art, the combination of pressing bonding, ultrasonic bonds, dynamic mechanically is bonding or other is suitable fixing means or these fixing means.

Some zone of whole sanitary towel 20 or sanitary towel 20 can be extended on all directions.Absorbent device that can multidirectional elongation preferably has main part, this main part comprises at least two zones that can extend in different directions, at least one zone in these zones, preferred two or more zones can extend 25% under the power effect that is less than or equal to about 500 grams.In the embodiment shown in Fig. 1-4, the central area 36 of sanitary towel 20 usually can be along transverse extension.The described horizontal normally direction of arrow shown in Fig. 1.As shown in FIG., if sanitary towel 20 is provided with flank 24, then the extensibility of central area 36 may extend in the flank 24.But central area 36 extending transverselies are to help to center on the curved sides folded side panel 24 on wearer's underwear.

Term used herein " usually in the horizontal " (or usually on other direction) is meant that the fundamental component of extensibility is along specified direction.Yet all elongations needn't be accurately on assigned direction.Therefore, when mentioning extensibility usually in the horizontal the time, extensibility needn't accurately be parallel to the main transversal centerline of sanitary towel.Yet, preferably make extensibility be positioned at horizontal degree greater than vertically.

Each petiolarea in first and

second petiolareas

32 and 34 of the sanitary towel 20 shown in Fig. 1-4 all preferably includes three zones of extensibility.Three zones of extensibility comprise first zones of extensibility, 44, the second zones of extensibility 46 and the 3rd zones of extensibility 48.Although in other embodiments needn't be like this, among the embodiment shown in the figure, it is symmetrical that identical in the zones of extensibility in first petiolarea 32 of sanitary towel 20 and second petiolarea 34 respectively distinguished.

First zones of extensibility 44 of

petiolarea

32 and 34 preferably is set along at least a portion on the longitudinal midline L of sanitary towel.The part of first zones of extensibility 44 is preferably placed near 22 1 of main parts and holds on the position on limit 28.Preferred first zones of extensibility 44 is to be the common pie shaped district at center with the longitudinal midline.First zones of extensibility 44 preferably has the tip or the top 50 of center line L setting longitudinally.Preferably make tip 50 extend to the ora terminalis 52 of central area 36 basically always.Among the embodiment shown in the figure, first zones of extensibility 44 is also preferably basically along laterally (as shown by arrows) stretching, extension.This can stretch the district that wins with wearer's panty, particularly in wearer's seat area.The wearer preferably make first and second petiolareas 32 have identical extensibility so that can be worn on any end of sanitary towel 20 in the seat district of its smallclothes with 34.

Second zones of extensibility 46 is arranged on the lateral outer side of at least a portion first zones of extensibility 44.Second zones of extensibility 46 is positioned at a side of first zones of extensibility 44.Second zones of extensibility 46 stretches to and preferably stretches to a vertical lateral margin 26 of sanitary towel's 20 main parts 22.As shown in FIG., if sanitary towel 20 is provided with flank 24, then this zones of extensibility in addition can reach main part vertical lateral margin 26 the outside and enter flank 24.Among the embodiment shown in the figure, cover that part of second zones of extensibility 46 on the main part 22 triangle that preferably roughly meets at right angles.

Among the embodiment shown in the figure, second zones of extensibility 46 can extend on the direction between the vertical and horizontal.Preferably, in this embodiment, preferably make second zones of extensibility 46 along direction elongation with basic vector component, as shown in Figure 1, the L shaped angled A of described basic vector component and longitudinal midline, this angle between about 45 ° and about 55 °, more preferably about 48 °.The opening portion of rotational angle A makes the transversal centerline T of angle faces to sanitary towel 20.As long as angle A is less than 90 °, will provide the extensibility of " to interior orientation ", or the basic vector component is inwardly towards the extensibility of transversal centerline T.This leaves the outside orientation of transversal centerline with the basic vector component promptly has " outwards directed " extensibility regional opposite.If extensibility outwards directed extensibility then may occur perpendicular to the arrow shown in the zone 46.Term " to interior orientation " and " outwards directed " are meant the direction of elongation rather than the direction that is tending towards withdrawing by the zone shown in the head of each arrow among Fig. 1.

Preferably the 3rd zones of extensibility 48 is arranged on the lateral outer side of at least a portion first zones of extensibility 44 of first zones of extensibility, 44 opposite sides.The 3rd zones of extensibility 48 is extended on a vertical lateral margin 26 of sanitary towel's 20 main parts 22.The 3rd zones of extensibility 48 also can reach in the flank 24.The also rectangular haply triangle of the 3rd zones of extensibility 48 parts of main body covered part 22.In the embodiment shown in the figures, the 3rd zones of extensibility 48 can stretch on the direction between the vertical and horizontal.Preferably, in this embodiment, the 3rd zones of extensibility 48 also has along the extensibility of basic vector component direction to interior orientation, and the L shaped angle that becomes of described basic vector component and longitudinal midline is preferably about 48 ° between about 45 ° and about 55 °.In preferred embodiment shown in the drawings, the second and the 3rd zones of extensibility 46 and 48 is arranged on the both sides of first zones of extensibility 44 symmetrically.

Sanitary towel 20 is that with the difference of many existing absorbent devices it preferably has the overall elongated that distributes along to the angular direction." diagonal angle " used herein is meant usually from an angle 27 of main part to the angle 27 of the offside of vertical and horizontal center line.This diagonal angle is shown among Fig. 5.As shown in Figure 5, preferably the principal direction of all extensibilities on sanitary towel's 20 main parts 22 is determined with the direction of the angled B of longitudinal midline L on.Angle B is greater than 0 ° and less than 45 °, and preferably between about 15 ° and about 30 °, and, be preferably about 20 ° to embodiment shown in the figure.

It should be understood that sanitary towel 20 can be extended on to the angular direction at two between four angles of main part 22.Therefore, sanitary towel 20 not only has the principal elongation component (wherein this angle rotates counterclockwise with respect to longitudinal midline L) by angle B orientation shown in Figure 5, but also has the component that clockwise rotates with respect to longitudinal midline L with equal angular.

The setting of the elongation of sanitary towel 20 also is very important.Preferably make sanitary towel shown in the figure 20 under the following given power effect longitudinally center line L produce the longitudinal tensile strain of following amount: be less than or equal to that elongation is 5% under the power effects of about 200 grams; Elongation is 10% under the effect that is less than or equal to about 550 gram forces; Elongation is 15% under the effect that is less than or equal to about 900 gram forces; Elongation is 25% under the effect that is less than or equal to about 1600 gram forces.But preferably make sanitary towel 20 elastic elongation in the vertical.After elongation longitudinally, sanitary towel 20 has a spot of permanent deformation (reaching 10% approximately).

Preferably make the sanitary towel 20 shown in the figure in transverse extension that the central area 36 of main part 22 under the following given power effect can produce following amount along transversal centerline T: being less than or equal under the effect of about 75 gram forces and extending 5%; Under the effect that is less than or equal to about 150 gram forces, extend 10%; Under the effect that is less than or equal to about 250 gram forces, extend 15%; Under the effect that is less than or equal to about 400 gram forces, extend 25%.Preferably make the petiolarea 32 of the main part 22 that the sanitary towel 20 shown in the figure records on being parallel to transversal centerline be approximately same amount and be subjected to the effect of identical power with transverse extension in 34.Sanitary towel 20 is extended along transverse elasticity at central area 36 and petiolarea 32,34.Carry out in these zones after the extending transversely, can there be a small amount of permanent deformation (reaching 10% approximately) in sanitary towel 20.

Preferably make sanitary towel shown in the figure 20 produce the diagonal angle elongation of following amount under the effect of following given force: being less than or equal under the effect of about 200 gram forces and extending 5%; Under the effect that is less than or equal to about 500 gram forces, extend 10%; Under the effect that is less than or equal to about 850 gram forces, extend 15%; Under the effect that is less than or equal to about 1500 gram forces, extend 25%.In these used all given power all is to record with one inch (2.45cm) wide clamper described in the following measuring method part.Preferably make sanitary towel 20 elastic elongation on to the angular direction.After sanitary towel had carried out the diagonal angle elongation, can there be a small amount of permanent deformation (reaching 10% approximately) in sanitary towel 20.

Under the situation of all prolonging directions of discussing in the paragraph in front, to such an extent as to preferably make sanitary towel 20 under the level of low active force, not have too big extensibility to be difficult to sanitary towel is fixed on wearer's the underwear.Preferably have make sanitary towel 20 under the power effects that are being less than or equal to about 50 grams on each direction of above-mentioned given extensibility elongation not too in or equal about 10%.Yet, should be realized that, be that preferred amounts is the same with the elongation that provides in this article, absorbent device of the present invention is not limited to have the articles for use of above-mentioned elongation, unless regulation is arranged in the appended claims in addition.

Because the prolonging direction in top flat 38 described herein and egative film 40 each district and omnidirectional's extensibility of preferred absorbent article core 42 are so can realize diagonal stretch.The diagonal angle overall elongated makes sanitary towel 20 have several advantages.The diagonal angle extensibility helps sanitary towel adapt to walk or the diagonal stretch of wearer's panty during similar motion.The diagonal angle overall elongated has reduced the tension force in the sanitary towel, this tension force can cause that the ora terminalis of sanitary towel folds into partly that the remainder of main part 22 is first-class does not wish that the trend that occurs (promptly, can prevent ora terminalis " upset " (roll over), wearer's underwear and the problem of making wearer's underwear dirty occur causing to cover).Under the situation of not wishing to be bound by any particular theory, can believe that reducing the end turn to small part can adapt to above-mentioned diagonal stretch better owing to sanitary towel 20 the fact.In addition, with sanitary napkin design become on the angular direction than have in the vertical bigger extensibility will make sanitary towel longitudinally center line (than maximum elongation appearance sanitary towel in the vertical) have bigger deflection, it also can reduce the ora terminalis upset.

Can make the zones of different of sanitary towel 20 and sanitary towel have extensibility with any suitable method.Among the embodiment shown in the figure, just can make it have extensibility by in the desired zone of the top flat 38 of sanitary towel 20 and egative film 40, forming deformation net.Manufacture deformation net by the described method that top flat and egative film base material are made the thin film (or change top flat and egative film base material " SELF ") of stretchable elastic-like herein.The appropriate method that forms deformation net in top flat 38 and egative film 40 is disclosed in the United States Patent (USP) 5518801 that is entitled as " Web materials that manifests the elastic-like feature " of authorizing people such as Chappell on May 21st, 1996.

As shown in Figure 1, top flat 38 and egative film 40 preferably have the several deformable webbed region that form therein.For deformable webbed region of central area 36 formation of main part 22, be that each district in three zones of extensibility of sanitary towel's 20 petiolareas 32 and 34 forms a deformable webbed region.Different deformable webbed region all preferably includes single top flat of part or egative film base material, has the area of the pattern that forms therein on the described material.In this embodiment, top flat 38 and egative film 40 have the identical deformable webbed region that forms therein (although for brief description on it adhesive graphic and in Fig. 4 the deformable net on the not shown egative film 40).Preferably make the deformable net directly alignment each other in top flat 38 and the egative film 40.

As shown in Fig. 1 and Fig. 2, each deformable net comprises at least two visually visibly different zones, first and second webbed region 64 and 66.Preferably, each deformable net comprises several first and second webbed region 64 and 66.Shown in preferred embodiment in, first webbed region 64 is plane basically.Second webbed region 66 preferably includes a plurality of distortion of protruding rib-shaped piece 74 forms that are.

When the deformable net is in not tensile state following time, the feature of first and second webbed region 64 and 66 is described according to each regional landform length that records (or first and second webbed region " surface-pathlength ") on these region surface.The surface-pathlength of second webbed region 66 is greater than the surface-pathlength of first webbed region 64.When deformable applies extending force on the net, male member 74 produces geometry deformations, and under this deformation state, male member 74 will become flat and stretch, first district distortion that will produce molecular level simultaneously.When the extending force that applied and discharge subsequently, will make the characteristic that shows elastic-like on the direction of distortion webbed region at arrow.The general characteristic of deformable webbed region has been described in the United States Patent (USP) 5518801 of authorizing people such as Chappell in more detail.

By carrying top flat and egative film base material respectively between the patterned roll, have between the matching board of figure the squeezing base material or can make the deformable net by casting in engagement.Can form the deformable net at several stages in the assembling of each parts of the sanitary towel 20 in the accompanying drawings.The deformable net is linked together make sanitary towel before, the deformable net can be made the parts of sanitary towel.In addition, the deformable net can be made the sanitary towel of overall package.Preferably, among the embodiment shown in the figure, before the deformable net is connected together, deformable net system is gone into to wrap into absorbent article core 42 in top flat 38 and the egative film 40 and between top flat and egative film.As mentioned above because absorbent article core 42 preferably has omnidirectional's extensibility, so absorbent article core 42 can but be not to have the deformable net that forms therein.Among the embodiment shown in the figure, preferably make absorbent article core 42 not have the deformable net that forms therein.

The part that reaches on top flat 38 and the egative film 40 outside absorbent article core 42 edges forms flange 76.Can couple together with any mode that can not influence sanitary towel's stretch capability these parts top flat 38 and egative film 40.Among the embodiment shown in the figure, preferred use the extending binding agent on the entire portion basically that extends to outside absorbent article core 42 edges and seals 78 top flat 38 and egative film 40 coupled together as the gain in strength waviness that is provided with of ora terminalis 28 places of main part 22, at described sealing part by exerting pressure or heating and pressurize with top flat 38 and egative film 40 compactings.Suitable extending binding agent is can be from MN, Fuller 2352 binding agents that the H.B.Fuller company of Badnais Heights has bought.Preferably contact the edge of absorbent article core 42 so that absorbent article core 42 is fixing with a little binder.

Waviness seals 78 stretch capabilities that should not influence each parts of sanitary towel.Preferably make the extending part of sealing 78 sanitary towels that connect to extend above-mentioned given amount and sanitary towel 20 is under the effect of above-mentioned given force (for example referring to the transverse elongation in the petiolarea) by waviness.Yet (, waviness seals 78 can make parts extend on a plurality of directions.) therefore, waviness can be sealed 78 and be called tensile waviness and seal (although under the situation of not using extensible member waviness seal 78 any inherent extensibility can be provided).Waviness seals 78 and preferably contains tight seal.Waviness seals 78 and is preferably formed sinusoidal potted line, along this line to major general's top flat 38 and the part of one of egative film 40 force together and/or fuse together.It is to be preferably arranged for the roughly sinusoidal figure of curve configuration that waviness shown in Fig. 1 seals 78.Can also use other configuration, for example straight sinusoidal figure.Be not bound by any particular theory if do not wish, can think that then waviness seals 78 and allows in the sanitary towel near the part elongation of sealing, this is to be stranded for the waveform of sinusoidal configuration makes corrugatedly to seal 78 and have " degree of tightness " property, can corrugatedly seal thus 78 be stretched to make its to the small part change directly.

Can adopt and variously tensilely corrugatedly seal 78.For example, can be arranged on the whole periphery of sanitary towel that comprises flank far-end edge corrugated sealing or on peripheral arbitrary part (below will describe).Except sinusoidal figure, can also use other that figure of required " degree of tightness " property can be provided, these figures include but not limited to chevron pattern.Tensile corrugated bandwidth, amplitude and frequency of sealing 78 sine (or other) figure can change.In addition, a plurality of sine waves ripple of other configuration (or have) join on phase place adjacent one another are.Can guarantee have successive ripple on the required part at sanitary towel's periphery after the processing with this a plurality of corrugated sealing.For example, can cut off corrugated sealing in process of production.This is the most recurrent when at the ora terminalis place sanitary towel's net being cut into single sanitary towel by last cutting operation (or by " final cutter ").Even a plurality of corrugated sealing can guarantee in process of production to seal cutting-out with a part is corrugated, liquid can wicking not seal 78 by ripple yet.

In other embodiments, successive sine wave can be sealed with discontinuous (or interruption) junction figure and combine.Discontinuous junction figure can be discontinuous sine wave or other suitable discontinuous graphic form.Downcut corrugated any part of sealing in process of production if the structure of discontinuous figure should make, discontinuous figure all will form zigzag stream and block and attempt any liquid of sealing wicking by corrugated.Because finally the position of cutting on ripple is not very strict, so these figures have also improved the motility of producing.

Tensilely corrugatedly seal 78 and have many advantages.These advantages include but not limited to the following.Certainly, tensilely corrugatedly seal 78 pairs and form the liquid-tight barrier from the liquid of sanitary towel's 20 ends, 28 wickings.Even corrugated sealing is successive, this seals each parts that also allows sanitary towel and stretches.Thought in the past and must avoid the elongation ability of each parts of extensible absorbent articles is impacted with discontinuous junction figure.Extendingly corrugatedly seal 78 and also help to prevent from not wish that the sanitary towel's ora terminalis that occurs partly folds into the trend on all the other main parts.Under the situation of not wishing to be bound by any particular theory, can think that above-mentioned phenomenon occurring is because extending corrugated 78 all differences of having eliminated extensibility between flange 76 and remaining main part 22 that seal, the difference of extensibility can make edge 76 produce when main part 22 is stretched to curl.

Sanitary towel 20 shown in the accompanying drawing 1-4 also comprises a pair of flank 24 that is connected on the main part 22.(or " free end ") 24B laterally extends outwardly into the outside of main part 22 vertical lateral margins 26 to flank 24 from its proximal edge 24A to its distal edge.Flank 24 outwards stretches from the central area 36 of main part 22 at least.As shown in fig. 1, each flank 24 is by flank transversal centerline T ₁Be divided into first half 54 and latter half of 56.Flank transversal centerline T ₁Overlap with the main transversal centerline T of sanitary towel, but this is not absolute requirement.Along seam each flank 24 is connected to (or attached thereto) on the main part 22.This is the seam of portrait orientation (or " vertically ") normally, and for example jointing line 68.Be meant that at this used term " seam " (or " jointing line ") flank 24 is from zone that main part 22 begins to extend or be connected to zone on the main part 22.

Can in any suitable manner flank 24 be connected on the main part 22.Term " connection " has comprised by parts directly being attached on another parts and parts directly has been fixed to structure on another parts as used herein; By being attached to, parts again intermediate member is attached on the intermediate member on other parts and the structure of a parts indirect securement to other parts; Be integral with parts and another parts, i.e. the structure that parts are the part of another parts basically.In the embodiment shown in Fig. 1-4, preferably make flank 24 and main part 22 be integral (that is, flank 24 be top flat 38 and egative film 40 whole extension component).

Can connect together containing the top flat 38 of flank 24 and the elongated portion of egative film 40 in any suitable manner.For example, can link at the elongated portion that will form the top flat 38 of flank and egative film 40 by binding agent on its whole interface or on its any suitable part and come together to form flank 24.Preferably, on the whole interface of the top flat 38 that contains flank 24 (as forming those parts of flange 76) and the elongated portion of egative film 40 with tensile binding agent for example Fuller binding agent 2352 pantostrat and with as described in top flat 38 connect together with egative film 40.

Flank 24 can be any suitable configuration.Suitable flank is disclosed in the reexamination certificate of issuing on April 27th, 1993 and authorizes the reexamination patent B14589876 that is entitled as " sanitary towel " of Van Tilburg; Authorized the United States Patent (USP) 4687478 that is entitled as " the molding sanitary towel that has flank " of Van Tilburg on August 18th, 1987; Authorize people's such as Lavash the United States Patent (USP) 5389094 that is entitled as " absorbent device " February 14 nineteen ninety-five with flank and different elongation zones; In the international patent application sequence number PCT US96/15957 that be entitled as " absorbent device with flank of band stepped construction and zones of extensibility " of on October 3rd, 1996 with people's such as Lash name application.

In a preferred embodiment, when flank 24 being wrapped on wearer's underwear edge, sanitary towel 20 has several improved characteristics aspect the stress of eliminating on main part 22 and the flank 24.

The central area 36 that an above-mentioned improved characteristic is a main part 22 is provided with cross-directional extensibility.This makes central area 36 elongations to help flank 24 to be folded in the curved sides of wearer's underwear.As shown in Figure 1, transverse elongation also preferably laterally extends outwardly into outside vertical lateral margin 26 of main part 22 and enters flank 24 from the central area 36 of main part 22.Among the embodiment shown in the figure, this transverse extension district preferably terminates in the zone 70 around flank binding agent 82.Preferably make around the deflection in the zone 70 of flank binding agent greater than the deflection of the remainder of flank 24 so that can adjust flank easily when helping consumer to use this product.

Another improved characteristic is among the embodiment shown in the figure, even flank 24 constitutes one with main part 22, they also have inboard certain any the zones of extensibility 72 (that is, in the second and the 3rd zones of extensibility 46 and 48) of the vertical lateral margin 42A that comes from absorbent article core 42 in the sanitary towel 20.For some reason, it is desirable to make zones of extensibility 72 to be positioned at the inboard of absorbent article core 42 vertical lateral margin 42A.At first, the extensibility of the vertical lateral margin 42A inboard by starting absorbent article core 42, and the elongation total amount that produces on the flank 24 is obviously increased with respect to the flank that all extensibilities all are in absorbent article core 42 lateral outer side.Secondly, when extensibility being located at absorbent article core 42 vertical lateral margin 42A inboard, described elongation performance more effectively adapts to various panty sizes and style.The where the shoe pinches that makes the sanitary towel with whole flank have extensibility in inboard, absorbent article core edge is that absorbent article core can not extend usually and is too thick so that can't form the deformable webbed region therein.Yet, among the embodiment shown in the figure, overcome these difficulties by using extending absorbent article core 42, described absorbent article core is surrounded by top flat 38 and egative film 40, all be formed with required zones of extensibility in top flat 38 and the egative film 40, and top flat 38 and egative film 40 are linked together.

Deformable webbed region vertical alignment in the top flat 38 on the extending part of top flat and egative film and the deformable webbed region that is located immediately in the egative film 40.The extending part of top flat 38 and egative film 40 can be connected on the absorbent article core 42 and it is extended with absorbent article core.In addition, can be in these zones in top flat 38 and the egative film 40 one or two do not linked to each other with absorbent article core 42.Preferably, in these zones, egative film 40 is not connected on the absorbent article core 42 at least.

Among the embodiment shown in the figure, the improved characteristic of another of sanitary towel 20 is the direction of the principal elongation vector component in the angular region 86 of flank 24 and the adjacent part of main part 22 (the second and the 3rd zones of extensibility 46 and 48).When sanitary towel 20 being shown with plane graph, the place that the outer rim that the angular region 86 of flank appears at flank 24 and vertical lateral margin 26 of main part 22 intersect.Angular region 86 not only comprises these angles, but also comprises the neighboring area and the adjacent area of inboard, flank 24 edge.Infall at these edges, needn't form acute angle or the expression acute angle the demarcation line.In the United States Patent (USP) 5389094 of authorizing people such as Lavash, comprised more detailed description to the angular region of the sanitary towel that has flank.Angular region 86 and the zones of extensibility 72 of embodiment shown in Fig. 1 are in the same area.

In each embodiment in the angular region 86 direction of the master vector component of extensibility can be mainly in the horizontal, main in the vertical or on the direction between horizontal and vertical.In the preferred embodiment shown in the figure, the direction of principal elongation vector component preferably is on the identical direction with the adjacent zones of extensibility of main part 22 in the angular region 86.Adjacent zones of extensibility is the second or the 3rd zones of extensibility 46 and 48.Because these two zones of extensibility are preferably symmetric form, so for two angular regions 86 of each flank 24, the relative direction of this master vector component is normally identical.Term " relative direction " is meant the angle between master vector component and the longitudinal midline L.Therefore, the relative direction of the principal elongation vector component of angular region 86 inwardly is towards the angled A of the transversal centerline T of sanitary towel 20.

In angular region 86, make the principal elongation vector component have many advantages to interior orientation.Extensibility is designed to when on the curved edge that flank is folded into wearer's underwear, can be than before more effectively eliminating stress on the flank 24 for addressing this problem many trials of making.Particularly, when on the curved edge that flank 24 is wrapped wearer's underwear crotch district, the elongation performance solves the problem that causes because of the main part 22 that acts on sanitary towel 20 and the power on the flank 24.

A problem in this described extensibility orientation that will solve relates to flap or flank " disengagement " (" popoff ").This comprises flank binding agent 82 (below will describe in more detail), and the flank binding agent is designed to by flank 24 being fixed to the downside of wearer's underwear or being fixed on the opposing side flaps and flank 24 is fixed to around the underwear.Underwear side folded side panel 24 around the wearer will produce tension force on flank.This tension force flank binding agent 82 is lost and wearer's underwear downside or opposing side flaps between bonding and become disconnected or make both " disengagements ".Attempt to prevent that a kind of mode that flap is thrown off from being the intensity that increases flank binding agent 82.Yet the intensity that increases flank binding agent 82 may cause other problem.

Another problem of the said extensibility orientation that need solve is owing to the tension force that produces around wearer's underwear side folded side panel 24 has also applied tension force on the main part 22 of sanitary towel 20.This special and high flexibility sanitary towel, extending sanitary towel for example as herein described is relevant.By stack flank 24 be applied to tension force on the main part 22 can make main part 22 petiolarea 32 and 34 and the binding agent that is fixed on wearer's underwear break away from.This will cause the ora terminalis 28 of main part 22 to fold to or be rolled onto the top of main part 22 other parts.

Another problem in the high flexibility sanitary towel that the tension force that produces because of folded side panel 24 causes has been shown among Fig. 6.Fig. 6 represents a high flexibility sanitary towel 20.Have flank although it should be understood that sanitary towel 20, for simplicity and not shown flank, this is because our interested influence that mainly is power to main part 22 in Fig. 6.As shown in Figure 6, the tension force that produces because of folded side panel 24 can inwardly pull to main part 22 one or both ends transversal centerline and the each several part of main part 22 is folded each other.Make the part of turning up be adhered to the bottom of main part 22 in the face of the panty fixed adhesive on the garment side 20B in the sanitary towel.From the shape that the main part branch is got, can be at this with this folding being called " Z-shaped folding ".

The direction of principal elongation vector component can reduce or eliminate these problems basically in angular region 86.Determined that the great majority in these problems are attributable to be applied to the petiolarea of main part 22 and by the tension force between some part of flank binding agent 82 fixed flanks 24.The direction of principal elongation vector component is preferably the direction that is parallel to the tension lines between these parts in the sanitary towel usually in angular region 86.This extensibility has reduced the petiolarea of main part 22 and by the tension force between flank binding agent 82 fixed flank 24 some part.In addition, identical with the prolonging direction of the second and the 3rd zones of extensibility, the prolonging direction of angular region 86 is also towards flank transversal centerline T ₁To interior orientation.Some previous effort are intended to the extending part of flank is oriented on the prolonging direction identical with wearer's panty elastic cord.The extensibility that described sanitary towel had is in the direction that the panty elastic cord with the wearer intersects and more approaches on the direction perpendicular to described elastic cord.

It should be noted, in the preferred embodiment shown in the figure,, but preferably make angular region 86 and second and third zones of extensibility 46,48 elastic elongations owing to form the deformable webbed region in angular region 86 and second and third zones of extensibility 46,48.This is to realize under situation about traditional elastic cord not being fixed in the material that contains these parts of sanitary towel.In addition, the less zone (first webbed region) of extensibility can be so that the mode that flank folds into below the absorbent article core apply tension force on these zones of sanitary towel.

Elongation is following on the direction of first webbed region 64 wherein measures being parallel under the given power effect with the second and the 3rd adjacent zones of extensibility 46,48 preferably to make angular region 86 on 20 flanks of sanitary towel shown in the figure: be less than or equal under the effect of about 75 gram forces and extending 5%; Under the effect that is less than or equal to about 150 gram forces, extend 10%; Under the effect that is less than or equal to about 175 gram forces, extend 15%; With under the effect that is less than or equal to about 250 gram forces, extend 25%.But preferably make the angular region 86 of the flank 24 shown in the embodiment and second and third adjacent zones of extensibility 46,48 elastic elongations.The angular region 86 of the flank 24 shown in the figure and second and third adjacent zones of extensibility 46,48 can have a small amount of permanent deformation (reaching 10% approximately) after elongation.

Flank shown in the figure 24 can have multiple alternative embodiment.In (not too preferred) embodiment, the angular region of flank 24 does not have the extensibility to interior orientation as herein described, but can have overall elongated in the horizontal, in the vertical overall elongated or on the direction between the vertical and horizontal the outside zone of elongation.In addition, in preferred embodiment not too, can also from the angular region 86 of flank, remove by the band that the extensibility that contain deformable net first district 64 is less.Can also comprise from the other parts of sanitary towel and remove the less zone of extensibility the main part 22.Also fall within the scope of the present invention for the flap that is used in traditional not extending absorbent device described herein.

The medicated clothing face 20B of sanitary towel 20 can comprise and preferably comprise really and be used for sanitary towel is fixed to fixture on wearer's underwear.Fig. 1 shows and is suitable for the main part 22 of sanitary towel 20 is fixed to central cushion fixture 80 in the crotch portion of underwear.Can with the fixture of known any kind in the prior art for example bonded type fixture and mechanical type fixture as central cushion fixture 80.Have been found that the fixture that comprises binding agent can work well for this reason, and contact adhesive preferably.

Central authorities' cushion fixture 80 can be any suitable structure.Preferably as shown in Figure 4, the structure of central cushion fixture 80 comprises the adhesive area 80A of portrait orientation, extends several " branch " 80B, 80C and 80D from this district.The 80B of branch, 80C and 80D are positioned on the

petiolarea

32 and 34 of main part 22 and preferably stretch to the periphery 30 of main part 22 from longitudinal midline L.In each petiolarea, each of stretching in three zones of extensibility 44,46 and 48 among the 80B of binding agent branch, 80C and the 80D.Preferably the 80B of binding agent branch, 80C and 80D are oriented in usually on the direction perpendicular to each district's principal elongation direction.Have been found that sanitary towel 20 is anchored on securely wearer's underwear really on the allocation in this permission on required direction, have extensibility.Can binding agent be applied on the egative film 40 with any suitable means.Preferably, in an illustrated embodiment, constituting each district and the ramose binding agent of each binding agent is tensile hotmelt, and for example the Fuller binding agent 2238 that can obtain from H.B.Fuller company is painted spiral figure so that certain elongation degree to be provided with this binding agent.

Preferably near on the outer surface of flank far-end edge 24B the flank fixture is being set on the flank 24, for example the flank binding agent 82.When flank binding agent 82 is used for around flank being wrapped in panty crotch portion edge, help flank 24 is remained on definite position.Although flank binding agent 82 can be any suitable dimensions, preferably be flank 24 distal portions 24B length about 60% and about 80% between.The suitable bonding fixture has in United States Patent (USP) 4917697 in more detail to be described.By being fixed to flank 24 on the underwear or can holding it on definite position on the opposing side flaps.

The fixture that uses among the present invention, central cushion fixture 80 and flank fixture 82 are not limited to the adhesive device.The fixture of any kind that uses in the prior art may be used to this purpose.For example, can be by mechanical fixed part VELCRO hook material for example, or authorize being entitled as of Battrell the United States Patent (USP) 4946527 of " pressure-sensitive adhesion fixture and make the method for this fixture " August 7 nineteen ninety or authorize the fixture described in people's such as Goulait the United States Patent (USP) 5392498 that is entitled as " mechanical fixation system that friction free is of value to skin " February 28 nineteen ninety-five.Yet, for the sake of simplicity, will fixture be described at the adhesive device.

The adhesive device is respectively 84 removable release liner by label, and promptly central cushion release liner and flank release liner cover.Should cover contact adhesive with release liner 84 adheres on the irrelevant surface before use so that prevent binding agent.Suitable release liner has been described in United States Patent (USP) 4917697.In a preferred embodiment, flank 24 is folded on the top flat and cover flank binding agent 82 with a separate paper.Can cover adhesive device on this flank without release liner, but it removably is adhered on the adherent surfaces that is located at some other parts of sanitary towel, these parts comprise main part, or flank, or are fixed to the separating component on main part or the flank.For example, can resemble described in the United States Patent (USP) 5281209 of authorizing people such as Osborn on January 25th, 1994 folding and upset flank 24.In addition, sanitary towel 20 can also be provided with particularly preferred release liner, this release liner can resemble described in the United States Patent (USP) 4556146 of authorizing people such as Swanson use as the individual packaging spare of parcel sanitary towel.

Just can use sanitary towel 20 by taking off release liner 84 and sanitary towel 20 being put on the panty.Main part 22 is placed in the crotch district of panty, makes an end of main part 22 stretch to the front portion of panty and make the other end stretch to the rear portion of panty.Egative film 40 is on the contacted position of center inner surface with panty crotch district.Central authorities' cushion adhesive part 80 is held in place main part 22.Then flank 24 is folded in around the side of panty.Flank binding agent 82 is fixed to flank 24 on the bottom or opposing side flaps of panty.

Absorbent device described herein can also have other embodiment.For example, Fig. 7 and Fig. 8 show an absorbent device embodiment who occurs with composite sanitary napkin 720 forms.Compound sanitary towel 720 comprises main hygroscopic part (or " core pipe ") 790, the linking together towards bodyside of main hygroscopic part and auxiliary hygroscopic part (or " base wad ") 792.A large amount of body fluid that main hygroscopic part 790 preferred absorptions will be discharged by user.The main effect of base wad 792 is to prevent that the medicated clothing of user from being made dirty by absorption liquid of discharging from main hygroscopic part 790 or the unexpected body fluid that flows through main hygroscopic part 790.

In Fig. 7 and embodiment shown in Figure 8, main hygroscopic part 790 comprises the outer cover 796 of absorbent structure (for example absorbent article core 794) and parcel absorbent article core 794.Outer cover 796 can comprise any material that is suitable as top flat shown in above-mentioned Fig. 1-4 among the embodiment.

Absorbent article core 794 can comprise any material that is fit to absorb or keep liquid (for example menstruation and/or urine).The example of the absorbing material that is fit to comprises the wood fragments slurry of so-called air felt; The cellulose wadding that creases; The meltblown polymer that comprises coforming (coform); Chemistry is stiffening, modification or cross-linked cellulosic; Synthetic fibers such as the polyester fiber that curls; Peat bog; The fabric that comprises fabric wrappage and fabric laminate; The moisture absorption foam; The moisture absorption sponge, the superabsorbent polymer; Sucting wet gel material; Or any suitable material or the compositions of these materials, or these mixtures of material.The structure of absorbent article core and structure be to change (for example, absorbent article core can have different caliper zones (in the middle of being processed into thicker shape), hydrophilic gradient, superabsorbent gradient or lower density and lower quantitative collection district; Maybe can comprise one or more layers or one or more structure).

Main hygroscopic part 790 may further include the selective collection layer 798 shown in Fig. 9.Collecting layer 798 can be the separating component between outer cover 796 and absorbent article core 794, or an integral part of compound outer cover.Several effects can be played in collecting layer 798, and these effects comprise that improving effluent inhaled and sucked in the absorbent article core 794 and/or with absorbing material and be included in the absorbent article core 794.

The base wad 792 of composite sanitary napkin 720 shown in Fig. 7 and Fig. 8 preferably includes the sanitary towel 20 shown in Fig. 1-4.The element that adds base wad 792 shown in Fig. 7 and 8 that numeral 700 discussed in conjunction with Fig. 1-4 above being illustrated in by front in the used same reference numerals of Fig. 1-4.Main hygroscopic part 790 can but be not must be tensile.As shown in Figure 7, in a preferred embodiment, the outer cover 796 of main hygroscopic part 790 comprises the identical materials used with the top flat 738 of base wad.Preferably, as shown in Figure 7, after outer cover 796 being wrapped on the main hygroscopic part 790, the elongation zone in the outer cover 796 directly with base wad 792 on top flat 738 on the elongation zone align.

Authorize in the United States Patent (USP) 4425130 of DesMarais and the legal invention of nominal disclosed be entitled as of on November 5th, 1996 with people such as Mayer " composite sanitary napkin adaptive with health " is registered among the H1614 and further described combined type sanitary towel (not describing extensibility at this) on January 10th, 1984.

In other embodiments, can be optionally replace parts such as the top flat of described absorbent device herein and egative film with any suitable (tensile) parts described in patent that is incorporated herein by reference and the patent application.For example, in a non-limiting example, if necessary, can replace described egative film herein with liquid-tight extending adhesive films with deformable webbed region.In addition, described herein absorbent device can optionally have the patent that is incorporated herein by reference and any characteristic and/or the feature described in the patent application.

For example, other embodiment of sanitary towel 20 can be on the given different directions of this paper elongation a certain amount of, described elongation be described in the United States Patent (USP) 5611790 when sanitary towel being through the elongation that produces under the effect of power related in the panty.Sanitary towel of the present invention can also have the further feature of sanitary towel described in the United States Patent (USP) 5611790, and these features are included as and prevent that elongation is provided with " power barrier " structure above specified quantitative under the situation that the amount that is applied to the power in the sanitary towel does not have to increase substantially.

In these or other embodiment, described herein absorbent device can be provided with any other suitable construction the elongation zone or can what its proper orientation in office on tensile zone.Described herein absorbent device can also be provided with a plurality ofly has the zone of greater or lesser draftability so that improve and the contacting or reach other purpose of wearer's body than other zone.The example of the absorbent device in some zones with different extensibilities has been described in the patent that is incorporated herein by reference and the patent application.For example, in the United States Patent (USP) 5611790 of authorizing people such as Osborn, the sanitary towel with different extensibilities zone has been described.U.s. patent application serial number 08/383536 (P﹠amp in February 2 nineteen ninety-five with people's such as Osborn name application; G files 5151R) be to have described among the disclosed PCT publication number WO95/20931 August 10 nineteen ninety-five to have the sanitary towel that improves structure, this structure can make sanitary towel and wearer's health keep in touch.

Described herein absorbent device also can be provided with than more stiffening or more softish zone, other zone so that improve and the contacting or reach other purpose of health.For example, the sanitary towel 20 that reinforcement 90 can selectivity be set has been shown among Fig. 4.The alternative reinforcement that is provided with 90 preferably is provided with along the part periphery of absorbent article core 42 at least, and particularly the vertical lateral margin 42A along absorbent article core 42 is provided with.The alternative reinforcement that is provided with can be positioned at the inboard of absorbent article core 42 whole peripheries.Yet, preferably as shown in Figure 4, the alternative reinforcement 90 that is provided with is not appeared on the longitudinal midline L of sanitary towel 20.

In the embodiment shown in fig. 4, the alternative reinforcement 90 that is provided with comprises the man-made fibre material of 60% polyester/40%, and these materials can have been bought from fabric stores, and described material is to be known as PELLON by what Freudenbert Nonwovens sold ^The Craft-Bond material.The stiffening preferred thickness of material of PELLON is 0.35mm, and bending rigidity is about 0.85g/cm for about 33 gram Taibo deflections.The stiffening material of PELLON can be located between any layer of sanitary towel 20.Preferably the stiffening material of PELLON is located at absorbent article core 42 bottoms and with binding agent for example Fuller 2031 binding agents be connected to the downside of absorbent article core.

Thereby the reinforcement 90 that selecting shown in Fig. 4 is provided with is not wished the protuberance that occurs and is reduced or eliminated ora terminalis discussed above " upset " problem for the

petiolarea

32,34 of vertical lateral margin of absorbent article core and sanitary towel 20 provides additional stiffness to reduce.Can select the reinforcement 90 that is provided with also along providing improved " raised portion " in the sanitary towel zone of sanitary towel's longitudinal midline so that improve and the contacting of wearer's body.Under the situation of not wishing to be bound by any particular theory, can think improved " raised portion,, be because of existing reinforcement 90 to cause, all raised portions all concentrate on center line longitudinally and are on the zone between reinforcement 90 inward flanges.Reinforcement district on sanitary towel neighboring or the side also helps sanitary towel is fixed on wearer's the panty.

Yet should be realized that, if with PELLON etc. not extensible materials will reduce or eliminate the extensibilities in sanitary towel 20 stiffening districts as reinforcement material.Yet particularly when longitudinally center line L reserved the gap between reinforcement 90, the sanitary towel 20 of this embodiment still can effectively work.This embodiment still can be as mentioned above center line and the angular direction is being extended longitudinally.This embodiment also makes first zones of extensibility, 44 transverse extensions in the petiolarea 32,34.If do not want to influence the extensibility of sanitary towel, can select to have the to a certain degree stiffening material of extensibility.

In addition, in other embodiments, can not establish flank, and underwear coating member or (" side parcel element ") are set on absorbent device, described parts preferably have littler span and do not need the wearer to adjust when placing wearer's underwear than the flank of stock size.Authorized people's such as Lavash the United States Patent (USP) 5584829 that is entitled as " absorbent device " on the 17th with the panty coating member that in fact coats the panty side at December in 1996; JIUYUE in 1993 u.s. patent application serial number 08/124180 that is entitled as " absorbent device " with people's such as Mansfield name application (March 23 nineteen ninety-five is open, PCT application number WO95/07675) on the 17th with the panty coating member that constitutes by the extending Web materials that presents the elastic-like feature; Authorized in 24th with JIUYUE in 1996 in people's such as Weinberger the United States Patent (USP) 5558663 that is entitled as " absorbent device " and described absorbent device with side packaging components with underwear coating member of band zones of extensibility.

The open source literature of mentioning in all patents that are hereby incorporated by, patent application (with all patents of having authorized and all corresponding disclosed foreign patent applications) and this patent application.Yet all documents that obviously are hereby incorporated by do not provide or open the present invention.And obvious described in this article any material that can obtain from the market or product does not also provide or open the present invention.

Recognize with it should also be clear that; even restricted and scope given herein is included in all narrower ranges, restriction and the quantity in given limit and the scope and does not list those restrictions and scope separately, these limited scopes and restriction also should obtain protection.

Experimental technique

Unless other explanation is arranged, otherwise all following tests finish with following sample all, before test, described sample is placed on relative humidity and is 50% and temperature be the indoor maintenance two hours of 73 (23 ℃).Under similar condition, test.

The capacity of absorbing material

Can determine the moisture absorption capacity of absorbing material by following mode.

(absorbing material of the size of 6.4cm * 7.6cm) is made rectangle sample with 2 1/2 inches * 3 inches.Samples weighing is accurate to 0.1 gram.Make it to be immersed in the distilled water fully by in being full of the dish of distilled water, soaking sample with form not crooked or that reverse or fold.Sample was soaked 20 minutes.Sample taken out from distilled water and hang distilled water was discharged in two minutes from sample.Then sample is weighed, be accurate to 0.1 gram and deduct the dry weight of dry-eye disease.Be the moisture absorption capacity of sample with the weight difference of gram expression.Can represent the moisture absorption capacity with the ratio (gram/gram) of moisture absorption capacity and sample dry weight.

The extensibility test

The tensile test equipment of constant rate of speed has been adopted in the extensibility test of following absorbing material or sanitary towel (or other absorbent device), described equipment can be that for example the instrument model is the cupping machine of 1122#, maybe can be from Newbury, OH 44065, and P.O. Box is that the model that 187 EME company obtains is the EME cupping machine of 559A.

Computer preferably is set on testing equipment, and this computer can provide the binding clasp end from the LCD of reference position distance reading with act on the reading of the power on the sample when binding clasp leaves the reference position different distance.

Care should be used to ground is disposed sample and is subjected to any stretching to avoid sample before testing.If test on absorbent device, each sample of then tackling the different product of taking from five same types carries out repeated trials.If all samples all falls in the scope or limit of requirement, think that then described product falls in the scope of claims protection.

A. the bar girdle tests of the extensibility of absorbing material-1 inch (2.5cm)

Measure the sample of extensibility

Preferably take off sample on the net from the absorbing material that adds before the absorbent device.If can not accomplish this point, can be by taking off the absorbing material material sample that is absorbed from absorbent device carefully.This can be simultaneously careful so that can not damage absorbing material or do not do any thing that influences the absorbing material extensibility and finish by the other parts of peeling off absorbent device.

Can be by using from Thwing-A1bert, the model that Philadelphia, PA have bought is that the accurate sample cut-off knife of the JDC of #1-12 just can obtain sample from 1.0 inches (2.54cm) wide bands of absorbing material cutting-out.Term " absorbing material " is meant the general material that uses as the main hygroscopic part of product, for example absorbent article core of product as used herein.Described material has also comprised the absorbing material of wicking or storage effect.

Should from absorbent device, obtain the sample strip that the measurement longitudinal tensile strain is used with respect to the part of absorbent device longitudinal midline centering.The length of band should extend to the total length of the absorbent device of sampling usefulness.

If can before absorbing material is put into absorbent device, take off sample on the net from absorbing material, then should downcut 1 " * 4 " thus fabric strip its extensibility is appeared on the identical direction, this direction is decided to be the direction of the absorbent device that assembles.Should downcut the sample of measuring longitudinal tensile strain from first sample of absorbing material.And from second sample of the absorbing material of the first sample same type (that is, identical materials or product) on downcut the sample of measuring transverse elongation.Equally, downcut the sample of measuring the diagonal angle extensibility from going up with the absorbing material of the first sample same type or the 3rd sample of absorbent device (that is, identical materials or product).

Band as the sample of measuring transverse elongation is 1.0 inches wide bands, and this band is to cut from the absorbing material that is parallel to the stretching, extension of absorbent device transversal centerline (thereby or making absorbing material in the absorbent device location that assembles it be stretched along described direction).Can on any one the 1 inch wide zone on the absorbing material that is parallel to the transversal centerline stretching, extension, downcut as measuring the band that the transverse elongation sample uses.Described sample needn't stretch along transversal centerline.

Can on 1 inch wide zone in the absorbing material that stretches with the longitudinal midline of absorbent device angle at 45 (thereby or it is stretched absorbing material location), downcut band as the sample of measuring the diagonal angle extensibility.

Test procedure

Sample is put on the testing stand unfetteredly.The length of measuring samples (perpendicular to the sample size that stretches on one inch wide dimensional directions) is accurate to 0.1 inch (0.25cm).

On tensile test equipment, clamp each end of sample with 1 inch (2.54cm) wide clamper.The clamper of cupping machine is designed to make it to draw back (that is to say, can draw back clamper on the angle with 180 degree) on opposite directions.With sample centering and make clamping pressure any slip (this is adapted to all extensibility test methods) occur in clamper even as big as preventing the sample in the clamper.Sample is clamped, make that the outermost edge (being free end) of clamper is inside apart from about 0.5 inch of the ora terminalis of absorbing material (about 1.3cm).

The full-length of cupping machine is set to the length (recording) that deducts the absorbing material after the absorbing material amount (being generally 1 inch) that sandwiches in each clamper with said method.Have been found that suitable full-length is 2 inches (5cm).Crosshead speed with 20 inch per minute clocks (51cm/ minute) begins to stretch.When articles for use arrive full-length, the ergometer of assay device is modified to 0.The trigger point that begins to collect data is located at 5 gram force places.

Get the power and the extensibility of desired times and measure, finish test.When proceeding said process, for the power of the purpose of appended claims is the actual forces of reading on testing equipment.This result represents with gram/inch or g/cm.

If but the band of 1 inch absorbing material can be a certain amount of in following three directions elongation and the effect of holding capacity, that is: vertically, along any one cross section of transversal centerline and 45 ° to the angular direction, but think that then this absorbing material is the material of omnidirectional's elongation.

B. measure the method for absorbent device or absorbent device each several part extensibility

This test is used to measure absorbent device or each regional extensibility of absorbent device.The test type that is used for this purpose is known " grasping test ".This test is included in and clamps the part of absorbent device in the clamper of cupping machine and apply tensile force on the desired zone of whole absorbent device or absorbent device.

The sample that is used for this test is whole absorbent device.Should use the single absorbent device sample of same type (that is, like products) to measure absorbent device extensibility in different directions, or the extensibility on the absorbing material zones of different.

Can the test that absorbent device carries out be comprised: the longitudinal tensile strain of absorbent device; The transverse elongation of absorbent device (along transversal centerline with in the petiolarea of absorbing material); The diagonal angle extensibility of absorbent device; The extensibility of the zones of extensibility on the angular region of flank and the close main part of flank; And the corrugated extensibility that seals.

In this test, what use in the testing machine is 1 inch clamper that (2.54cm) is wide.If each zone of absorbent device has the extensibility of different directions, and need to measure each regional extensibility, then care should be used to ground is put into two clampers in the desired zone fully.If can not accomplish this point, then clamper should be put in the required zone as far as possible fully.

When the longitudinal tensile strain of test absorbent device, should be with the longitudinal midline centering of clamper with respect to absorbent device.When the transverse elongation of test absorbent device central area, should be with clamper with respect to transversal centerline centering.When the transverse elongation of test absorbent device petiolarea, clamper should be placed in the petiolarea so that make stretching be parallel to transversal centerline.When the diagonal angle extensibility of test absorbent device, make the intersection point of the master vector component of tensile force through absorbent device vertical and horizontal center line thereby clamper is placed on the diagonal angle of main part of absorbent device.

During extensibility between the elongation zone of the absorbent device main part of test angular region of flank and adjacency, clamper should be adjusted to suitable angle A.A clamper is placed on the flank and another clamper is placed in the zones of extensibility of main part.When the corrugated extensibility that seals of test, with clamper with respect to corrugated centering of sealing, so that apply tensile force comprising on the corrugated regional prolonging direction that seals.

Should clamp absorbent device and in each zone, make the outermost edge (being free end) of clamper inside apart from about 0.5 inch of the end edge of absorbing material (about 1.3cm).Yet, if the part in the zone do not have absorbing material (for example, a clamper that is arranged in the flank angular region, if or two clampers all be positioned at corrugated zone of sealing), do not need to clamp the inboard, edge of absorbing material.

The full-length of cupping machine is set at the length that deducts remaining absorbing material after the amount that clips to the absorbing material in each clamper.Crosshead speed with 20 inch per minute clocks (51cm/ minute) begins to stretch.When sample reached full-length, it was zero that the ergometer of testing equipment is proofreaied and correct.

Get the power and the extensibility of desired times and measure, and finish test.Its result represents with gram.

Although explained and described specific embodiment of the present invention, for the person of ordinary skill of the art, under the situation that does not break away from design of the present invention and scope, obviously can make various other changes and improvements.

Claims

1. absorbent device that is through underwear crotch district, described absorbent device comprises:

Main part, it has longitudinal midline, transversal centerline, a pair of vertical lateral margin, pair of end portions edge, first petiolarea, second petiolarea and the central area between first and second petiolareas, described main part comprises: the top flat of saturating liquid, link to each other with top flat liquid-tight egative film and the absorbent article core between this top flat and this egative film, and this absorbent article core has a pair of vertical lateral margin;

Be connected to a pair of flank of described main part, its described at least central area in described main part laterally extends outwardly into outside vertical lateral margin of main part, wherein said flank is formed by the extension of described top flat extension and described egative film, described absorbent device is characterised in that, the described extension of described top flat and described egative film has extending part, wherein is positioned at the inboard of the vertical lateral margin of described absorbent article core to the described extending part of described top flat of small part and described egative film.

2. absorbent device as claimed in claim 1, wherein, the described extending part of described top flat and egative film provides the zone with different extensibilities for described flank.

3. the described absorbent device of each claim as described above, wherein, the described extending part of described top flat and egative film mainly is to extend in the horizontal.

4. the described absorbent device of each claim as described above, wherein, the described extending part of described top flat and egative film mainly be with laterally extend at angle the direction.

5. the described absorbent device of each claim as described above, wherein, the described extending part of described top flat and egative film comprises the zone with a plurality of ripples.

6. as claim 1,2,3 or 4 described absorbent devices, wherein, the described extending part of described top flat and egative film is included in the zone that wherein is formed with deformation net, described deformation net comprises at least two visually visibly different zones, the surface-pathlength at least one described zone is greater than other zone, the zone that presents longer surface-pathlength has one or more rib-shaped pieces, and the zone with short surperficial path is preferably planar shaped basically.

7. absorbent device as claimed in claim 6, wherein, each flank comprises thereon flank fixture of position, the described planar shaped basically zone of described deformation net is oriented between the petiolarea of described main part and the described flank fixture extends.

8. the described absorbent device of each claim as described above, wherein, more than or equal to 50 gram forces be less than or equal under the effect of the power between 500 gram forces, described main part can extend 10% to 50% at least one direction.