WO2005011936A1 - Device and method for perforating web-like materials______ - Google Patents

Device and method for perforating web-like materials______

Info

Publication number
WO2005011936A1
WO2005011936A1 PCT/IT2003/000496 IT0300496W WO2005011936A1 WO 2005011936 A1 WO2005011936 A1 WO 2005011936A1 IT 0300496 W IT0300496 W IT 0300496W WO 2005011936 A1 WO2005011936 A1 WO 2005011936A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
roller
material
protuberances
web
perforation
Prior art date
Application number
PCT/IT2003/000496
Other languages
French (fr)
Inventor
Riccardo Cecconi
Original Assignee
Pantex Sud S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26FPERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/24Perforating by needles or pins

Abstract

The device for the perforation of a web-like material (N) comprises a first roller (7) provided with protuberances (13), cooperating with a second roller (9), said first and said second roller being arranged along parallel axes and rotating in opposite directions forming between them a perforation nip (8) through which the web-like material (N) passes. The second roller (9) is provided with a plurality of annular projections (15) arranged in such a way that the protuberances (13) arrange themselves between contiguous annular projections (15). In this way the web-like material is pinched in the perforation nip (8) between the first roller (7) and the annular projections (15) of the second roller.

Description

Device and method for perforating web-like materials Description Technical Field This invention relates to devices and methods for producing perforated web- like materials such as films, non-woven fabrics or other materials in continuous sheets, destined for use in the production of absorbent articles such as baby diapers and sanitary napkins or in the production of filtering items or other products. State of the art Layers of materials in perforated sheets are used in the production of absorbent articles, such as baby diapers and the incontinent, sanitary napkins, absorbent bandages and other products. In diapers and sanitary napkins, for example, the top-sheet, designed to come into contact with the skin of the person wearing the product, is composed of a perforated sheet which permits the passage of the body fluids which the product is designed to absorb. This layer can be composed of a perforated film, a non-woven fabric, a web of fibers, a multilayer structure consisting of films and layers of textile fibers for example, or the like. Perforation is carried out using various techniques. The technology of interest in reference to this invention envisages the use of a roller or cylinder provided with protuberances or projecting points, which cooperates with a pressure counter-roller. EP-A-0598970 disclosees a method and a machine for perforating films or other sheet materials, destined for the production of absorbent or filtering products.

According to this known technology, the roller provided with protuberances rotates at a surface speed which is greater than the surface speed of the pressure roller so that it tears the sheet material as an effect of plastic deformation. EP-A-1046479 and EP-A-1048419 disclose devices and methods for perforating plastic or similar films in which a roller provided with needles cooperates with a counter-roller in which there are holes into which the roller needles penetrate. The holes are shaped in a manner complementary to the shape of the needles to cause deformation of the film during perforation. The problem with these known devices and methods is that the web-like material to be perforated is crushed when it passes into the nip between the roller and the counter-roller, also because of the limited height of the protuberances. This crushing causes a reduction in the thickness of the web-like material, particularly when this material is a textile material, typically a non-woven fabric. This reduction in thickness constitutes a negative aspect, inasmuch as it reduces the distance which - in the end-product - remains between the outer surface in contact with the user's skin and the first internal layer of the absorbent product, typically a body fluid acquisition and distribution layer. Objects and summary of the invention The object of this invention is to provide a device which reduces or eliminates these problems. In particular, the object of the invention is to provide a device which limits or eliminates the reduction in the thickness of the web-like material during perforation. According to another aspect, an object of this invention is to provide a method for perforating a web-like material which limits or eliminates the problem of crushing and reduction in the thickness of the material itself during perforation. Substantially, therefore, from a first point of view, the invention envisages a device for perforating a web-like material, comprising a first roller provided with protuberances, cooperating with a second roller, said first and said second roller being arranged along parallel axes and rotating in opposite directions forming between them a perforation nip through which the web-like material passes, characterized in that the second roller is provided with a plurality of annular projections, arranged in such a way that the protuberances of the first roller arrange themselves between contiguous annular projections, that is, in annular grooves defined by contiguous annular projections. In this way, the web-like material is pinched, in the perforation nip between the two rollers, between the first roller and the annular projections, while the protuberances or points with which the first roller is provided penetrate into the material itself and perforate it. In this way the web-like material is perforated without being subject to excessive crushing. In particular, it is not compressed between the protuberances and the counter-roller, that is, the roller provided with annular projections. The thickness of the web-like material is not therefore reduced, except to a modest extent, by the perforation operation. Advantageously the protuberances on the first roller are arranged and dimensioned so as not to come into contact with the second roller. For this purpose, corresponding grooves are made between the adjacent annular projections, the width and depth of which grooves are greater than the width and length in the radial direction of the protuberances of the first roller. Advantageously, the protuberances of the first roller can have a height of between 0J and 5 mm, and preferably of between 0.5 and 4 mm and even more preferably between 1 and 3 mm. Their length can therefore be substantially greater compared with the length, typically in the order of a few tenths of a millimeter, of the protuberances of perforator rollers which cooperate with smooth counter- rollers. This also contributes towards not compressing and not crushing, in a substantial manner, the web-like material being subjected to the perforation process. From a different aspect, the invention concerns a method for perforating a web-like material in which said web-like material is perforated by making a plurality of protuberances borne by a first rotating roller penetrate through it, characterized in that the web-like material is pinched against the first rotating roller adjacently to said protuberances during perforation. According to an advantageous embodiment of the method in accordance with the invention, it envisages the steps of: arranging a second roller rotating around its own axis in the direction opposite to that of the first roller and defining a perforation nip with the first roller; - providing, on the second rotating roller, a series of annular projections arranged in such a way that the protuberances of the first roller penetrate between adjacent annular projections of the second roller; feeding the web-like material through the perforation nip and perforating the web-like material by means of the protuberances on the first roller, pinching said web-like material, during perforation, between the first roller and the annular projections. In practice it is possible to envisage heating the web-like material, for example by heating one or other or both the rollers between which it is perforated. Advantageously heating has the effect of causing at least a partial plasticization of the material, for example of the fibers with the lower plasticization temperature present in the mixture of fibers of which the web-like material is composed when the latter is a textile material. Plasticization facilitates perforation and fixation of the deformation which the web-like material undergoes around the perforated zone, which deformation increases the apparent thickness of the material, that is, its three-dimensionality. Further advantageous features and embodiments of the invention are set forth in the attached dependent claims. Brief description of the drawings The invention will be better understood by following the description and the attached drawing which shows a practical, non-limiting embodiment of the invention. More specifically, in the drawing: Fig. 1 shows a schematic side view of the device; Fig. 2 shows a portion in side view of the perforator roller provided with protuberances; Fig. 3 shows a portion in side view of the counter-roller, that is, the roller provided with projections and annular grooves; Fig. 4 shows a view of the two rollers in the operating position in the feed direction of the web-like material; Fig. 5 schematically shows examples of shapes and inclinations of the protuberances or needles of the perforator roller; and Fig. 6 shows an enlarged schematic section of the work zone in the perforation nip between the two rollers.

Detailed description of an embodiment of the invention Fig. 1 schematically shows a system for perforating a web-like material N, a non-woven fabric for example. The web-like material N is fed, through a pair of entry rollers 3, into a perforating unit 5, comprising a pair of rollers 7, 9 rotating in opposite directions and defining a perforation nip 8. A further pair of rollers 11 is arranged at the exit of the perforation nip 8. One or both the pairs of rollers 3, 11 can be motorized to impose on the web-like material N the desired feeding speed into the nip 8 and/or the desired speed of exit from the nip. The roller 7 is provided with protuberances or points arranged in an appropriate pattern. In the example illustrated (Fig. 2), the protuberances are arranged in helical alignments, that is, inclined with respect to the axis and to the plane orthogonal to the axis of the rollers 7. The inclination of the helix is equal to about 20-25° with respect to a plane orthogonal to the axis of the roller 7. The protuberances, indicated by 13, are also arranged according to annular alignments spaced from one another in the axial direction. The free space between adjacent annular alignments of protuberances 13 is sufficient to permit the penetration, between them, of corresponding annular ribs or projections 15 with which the roller 9 is fitted. In practice, the thickness of each annular projection 15 in the axial direction is equal to or less than the free distance between contiguous annular alignments of protuberances 13. The height, that is the extension in the radial direction, of the protuberances 13 can also be considerable, typically from 0J to 3 mm, that is up to one order of magnitude greater than the length of the protuberances normally used in perforation devices of the prior art. The height, that is the extension in the radial direction, of the annular projections 15 is greater than the height of the protuberances 13. The distance between the rollers 7 and 9 is such that the annular projections 15 press against the lateral surface of the roller 7 in the free zone between consecutive annular alignments of protuberances 13. With this arrangement, when the web-like material N passes into the nip 8 between the rollers 7 and 9 it is pinched by the annular projections 15 against the cylindrical surface of the roller 7, while the protuberances 13 arranged between contiguous projections 15 pierce the web-like material N between pinching points defined by the contiguous projections 15. The pinching of the material between projections 15 and the cylindrical surface of the roller 7 puts the web-like material N in tension, facilitating its perforation as an effect of the penetration of the protuberances 13. However, the relatively great distance between the cylindrical surfaces of the rollers 7 and 9 prevents the web-like material N from being crushed excessively during perforation. This maintains its softness and volume, and therefore its three-dimensionality and the draining capacity of said web-like material, in particular when it is composed of a textile layer, such as a layer (made up of one or more plies) of non-woven fabric. Some of the advantages obtainable using a non-woven fabric are also found with the use of a web of non-consolidated fibers, or with a plastic film. The protuberances 13 can have different shapes, some of which are visible in Figs. 5A-5I. In the example illustrated, the protuberances 13 have a cylindrical form, with a pointed tip to facilitate perforation, and conical and frustoconical shapes. These protuberances can have a radial development, as shown in Figs. 5A, 5B and 5C and in the remaining figures, or can be inclined (with respect to the radial direction) forwards or backwards, that is, in the direction of rotation or counter to the direction of rotation of the roller 7. Figs. 5D-5I show various shapes of protuberances or needles inclined with respect to the radial direction. In this drawing the axis of rotation is parallel to the horizontal side of the sheet observing the figures. The size of the section of the points or protuberances can be variable. For example, in the case of cylindrical protuberances, the base diameter can vary from 0.2 to 3 mm. Similarly, in the case of conical or frustoconical protuberances, the base diameter can vary from 0.2 to 3 mm, while the ratio between the smaller base and larger base in frustoconical protuberances can vary between 0.99 and 0J. The values shown must be considered indicative and not binding. Depending on the shape, inclination and dimensions of the protuberances 13, these can be made by chemical working or mechanical machining starting from a solid roller. Preferably, however, in consideration of their shape and size, these protuberances will be made in the form of points which are inserted and immobilized in holes made in the body of the roller 7. For example, as shown in the drawing, they can be made from rods whose proximal ends, fixed in the roller 7, are threaded and engage in corresponding threaded holes in the surface of the roller. Fig. 6 shows the effect of the perforation obtained with the pair of rollers 7 and 9. The web-like material N held by the adjacent annular projections 15 is perforated by the protuberances 13 which may also cause a slight deformation in it that makes part of the material rise from the plane it normally lies on, increasing the apparent thickness of the material itself. The deformation of the material is fixed by means of the heating of the rollers 7 and 9. This is because one or other or both these rollers can be maintained at a temperature, which varies for example between 20 and 200°C and preferably between 100 and 160°C, at which plasticization of the web-like material or of at least a part or of a component is obtained thereof. For example, the web-like material N can be formed by bi- component fibers or contain a percentage of bi-component fibers, the outer part of which has a relatively low plasticization temperature which is lower than the plasticization temperature of the core and/or of the remaining fibers. In short, the result of the method of perforation by means of the device described is a web-like material N which maintains its original thickness, as it is not crushed in the perforation nip 8, while its apparent thickness can be found to be increased by the permanent plastic deformation caused by the perforation. Rollers 7 and 9 can be made to rotate at the same surface speed or at different surface speeds. In this latter case, it is preferable for the surface speed of the roller 7 provided with the protuberances 13 to be greater than the surface speed of the roller 9 provided with the annular projections 15. The speed difference can advantageously be in the order of 1-50% and preferably in the order of 2-30% or 5-20%, though these values must not be deemed limiting. It is understood that the drawing only shows a practical non-limiting embodiment of the invention which can vary in its forms and arrangements, without moreover departing from the scope of the basic concept of the invention. The sole purpose of the presence of any reference numbers in the attached claims is to facilitate reading in the light of the preceding description and of the attached drawings and does not limit the scope of protection in any way.

Claims

Claims 1. A device for perforating a web-like material (N), comprising a first roller (7) provided with protuberances (13), cooperating with a second roller (9), said first and said second roller being arranged along parallel axes and rotating in opposite directions forming between them a perforation nip (8) through which the web-like material (N) passes, characterized in that said second roller (9) is provided with a plurality of annular projections (15) arranged in such a way that said protuberances (13) arrange themselves between contiguous annular projections (15), the web-like material being pinched in the perforation nip (8) between said first roller (7) and said annular projections (15). 2. Device as in claim 1, characterized in that said protuberances (13) are arranged and dimensioned so as not to come into contact with the second roller (9). 3. Device as in claim 1 or 2, characterized in that the height of said annular projections (15) is greater than the radial extension of said protuberances
(13). 4. Device as in claim 1 or 2 or 3, characterized in that said protuberances are arranged in alignments which are inclined with respect to the axis of the first roller and in alignments orthogonal to the axis of said first roller (7). 5. Device as in one or more of the previous claims, characterized in that said protuberances have a height of between 0.1 and 5 mm, and preferably of between 0.5 and 4 mm and even more preferably between 1 and 3 mm. 6. Device as in one or more of the previous claims, characterized in that at least one of said first and second rollers is heated. 7. A method for perforating a web-like material (N) in which said web- like material is perforated by making a plurality of protuberances (13) borne by a first rotating roller (7) penetrate through it, characterized in that said web-like material is pinched against said first rotating roller (7) adjacently to said protuberances (13) during perforation. 8. Method as in claim 7, characterized by the steps of: arranging a second roller (9) rotating around its own axis in the direction opposite to that of said first roller (7) and defining a perforation nip (8) with said first roller; providing, on said second rotating roller (9), a series of annular projections (15) arranged in such a way that the protuberances (13) of the first roller (7) penetrate between adjacent annular projections (15) of the second roller (9); - feeding said web-like material through said perforation nip and perforating said web-like material by means of the protuberances on said first roller, pinching said web-like material, during perforation, between said first roller (7) and said annular projections. 9. Method as in claim 8, characterized in that said protuberances (13) do not touch the second roller (9). 10. Method as in claim 7, 8 or 9, characterized in that said web-like material is heated during perforation. 11. Method as in claim 10, characterized in that said first and/or said second roller is heated. 12. Method as in one or more of the claims 7 to 11, characterized in that said web-like material is a textile material. 13. Method as in claim 12, characterized in that said web-like material is a non-woven fabric. 14. Method as in claim 12 or 13, characterized in that it comprises thermoplastic fibers, and that said web-like material is heated during perforation to a temperature sufficient to cause plasticization of said fibers. 15. Method as in one or more of the claims 7 to 14, characterized in that said web-like material is deformed in a permanent manner around perforations generated by said protuberances, to increase the apparent thickness of the material itself.
PCT/IT2003/000496 2003-08-04 2003-08-04 Device and method for perforating web-like materials______ WO2005011936A1 (en)

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Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2429524A (en) * 2004-12-13 2007-02-28 Australo Ltd Fabrication of an aperture in a deformable elastomeric material
US7670665B2 (en) 2002-12-20 2010-03-02 The Procter & Gamble Company Tufted laminate web
US7682686B2 (en) 2002-12-20 2010-03-23 The Procter & Gamble Company Tufted fibrous web
US7718243B2 (en) 2002-12-20 2010-05-18 The Procter & Gamble Company Tufted laminate web
US7732657B2 (en) 2002-12-20 2010-06-08 The Procter & Gamble Company Absorbent article with lotion-containing topsheet
US7785690B2 (en) 2002-12-20 2010-08-31 The Procter & Gamble Company Compression resistant nonwovens
US7829173B2 (en) 2002-12-20 2010-11-09 The Procter & Gamble Company Tufted fibrous web
US7838099B2 (en) 2002-12-20 2010-11-23 The Procter & Gamble Company Looped nonwoven web
US7910195B2 (en) 2003-12-16 2011-03-22 The Procter & Gamble Company Absorbent article with lotion-containing topsheet
US7935207B2 (en) 2007-03-05 2011-05-03 Procter And Gamble Company Absorbent core for disposable absorbent article
US8158043B2 (en) 2009-02-06 2012-04-17 The Procter & Gamble Company Method for making an apertured web
US8241543B2 (en) 2003-08-07 2012-08-14 The Procter & Gamble Company Method and apparatus for making an apertured web
US20120277706A1 (en) * 2011-04-26 2012-11-01 Luigi Marinelli Methods of Making Absorbent Members Having Density Profile
US20120277707A1 (en) * 2011-04-26 2012-11-01 Jill Marlene Orr Methods of Making Absorbent Members Having Skewed Density Profile
US20120277710A1 (en) * 2011-04-26 2012-11-01 Luigi Marinelli Methods of Making Absorbent Members Having Density Profile
WO2012149000A1 (en) * 2011-04-26 2012-11-01 The Procter & Gamble Company Methods of mechanically deforming materials
US8502013B2 (en) 2007-03-05 2013-08-06 The Procter And Gamble Company Disposable absorbent article
US8657596B2 (en) 2011-04-26 2014-02-25 The Procter & Gamble Company Method and apparatus for deforming a web
US8708687B2 (en) 2011-04-26 2014-04-29 The Procter & Gamble Company Apparatus for making a micro-textured web
US20150099086A1 (en) * 2013-10-04 2015-04-09 Kimberly-Clark Worldwide, Inc. Apertured outer cover for absorbent articles
US9028652B2 (en) 2011-04-26 2015-05-12 The Procter & Gamble Company Methods of making bulked absorbent members
US9044353B2 (en) 2011-04-26 2015-06-02 The Procter & Gamble Company Process for making a micro-textured web
US9067357B2 (en) 2010-09-10 2015-06-30 The Procter & Gamble Company Method for deforming a web
US9204775B2 (en) 2011-04-26 2015-12-08 The Procter & Gamble Company Scrubbing strip for a cleaning sheet, cleaning sheet used therewith, and method of making
US9220638B2 (en) 2010-09-10 2015-12-29 The Procter & Gamble Company Deformed web materials
US9242406B2 (en) 2011-04-26 2016-01-26 The Procter & Gamble Company Apparatus and process for aperturing and stretching a web
US9439815B2 (en) 2011-04-26 2016-09-13 The Procter & Gamble Company Absorbent members having skewed density profile
US9440394B2 (en) 2011-04-26 2016-09-13 The Procter & Gamble Company Methods of mechanically deforming materials
US9452093B2 (en) 2011-04-26 2016-09-27 The Procter & Gamble Company Absorbent members having density profile
US9452094B2 (en) 2011-04-26 2016-09-27 The Procter & Gamble Company Absorbent members having density profile
US9724245B2 (en) 2011-04-26 2017-08-08 The Procter & Gamble Company Formed web comprising chads
US9925731B2 (en) 2011-04-26 2018-03-27 The Procter & Gamble Company Corrugated and apertured web
US9981418B2 (en) 2015-04-08 2018-05-29 The Procter & Gamble Company Process for making a micro-textured web

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Cited By (53)

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Publication number Priority date Publication date Assignee Title
US8075977B2 (en) 2002-12-20 2011-12-13 The Procter & Gamble Company Tufted laminate web
US9694556B2 (en) 2002-12-20 2017-07-04 The Procter & Gamble Company Tufted fibrous web
US7670665B2 (en) 2002-12-20 2010-03-02 The Procter & Gamble Company Tufted laminate web
US7682686B2 (en) 2002-12-20 2010-03-23 The Procter & Gamble Company Tufted fibrous web
US7718243B2 (en) 2002-12-20 2010-05-18 The Procter & Gamble Company Tufted laminate web
US7732657B2 (en) 2002-12-20 2010-06-08 The Procter & Gamble Company Absorbent article with lotion-containing topsheet
US7785690B2 (en) 2002-12-20 2010-08-31 The Procter & Gamble Company Compression resistant nonwovens
US7829173B2 (en) 2002-12-20 2010-11-09 The Procter & Gamble Company Tufted fibrous web
US7838099B2 (en) 2002-12-20 2010-11-23 The Procter & Gamble Company Looped nonwoven web
US8153225B2 (en) 2002-12-20 2012-04-10 The Procter & Gamble Company Tufted fibrous web
US8697218B2 (en) 2002-12-20 2014-04-15 The Procter & Gamble Company Tufted fibrous web
US9308133B2 (en) 2003-08-07 2016-04-12 The Procter & Gamble Company Method and apparatus for making an apertured web
US9023261B2 (en) 2003-08-07 2015-05-05 The Procter & Gamble Company Method and apparatus for making an apertured web
US8679391B2 (en) 2003-08-07 2014-03-25 The Procter & Gamble Company Method and apparatus for making an apertured web
US8241543B2 (en) 2003-08-07 2012-08-14 The Procter & Gamble Company Method and apparatus for making an apertured web
US8357445B2 (en) 2003-12-16 2013-01-22 The Procter & Gamble Company Absorbent article with lotion-containing topsheet
US7910195B2 (en) 2003-12-16 2011-03-22 The Procter & Gamble Company Absorbent article with lotion-containing topsheet
GB2429524A (en) * 2004-12-13 2007-02-28 Australo Ltd Fabrication of an aperture in a deformable elastomeric material
GB2429524B (en) * 2004-12-13 2007-05-16 Australo Ltd Fabrication of deformable apertures in particle-sensitive or radiation-sensitive devices
US7935207B2 (en) 2007-03-05 2011-05-03 Procter And Gamble Company Absorbent core for disposable absorbent article
US8502013B2 (en) 2007-03-05 2013-08-06 The Procter And Gamble Company Disposable absorbent article
US9962867B2 (en) 2009-02-06 2018-05-08 The Procter & Gamble Company Method for making an apertured web
US8158043B2 (en) 2009-02-06 2012-04-17 The Procter & Gamble Company Method for making an apertured web
US9550309B2 (en) 2009-02-06 2017-01-24 The Procter & Gamble Company Method for making an apertured web
US9623602B2 (en) 2010-09-10 2017-04-18 The Procter & Gamble Company Method for deforming a web
US9415538B2 (en) 2010-09-10 2016-08-16 The Procter & Gamble Company Method for deforming a web
US9220638B2 (en) 2010-09-10 2015-12-29 The Procter & Gamble Company Deformed web materials
US9067357B2 (en) 2010-09-10 2015-06-30 The Procter & Gamble Company Method for deforming a web
CN103491915A (en) * 2011-04-26 2014-01-01 宝洁公司 Methods of mechanically deforming materials
US20120277707A1 (en) * 2011-04-26 2012-11-01 Jill Marlene Orr Methods of Making Absorbent Members Having Skewed Density Profile
US9028652B2 (en) 2011-04-26 2015-05-12 The Procter & Gamble Company Methods of making bulked absorbent members
US9044353B2 (en) 2011-04-26 2015-06-02 The Procter & Gamble Company Process for making a micro-textured web
US8708687B2 (en) 2011-04-26 2014-04-29 The Procter & Gamble Company Apparatus for making a micro-textured web
US9120268B2 (en) 2011-04-26 2015-09-01 The Procter & Gamble Company Method and apparatus for deforming a web
US9204775B2 (en) 2011-04-26 2015-12-08 The Procter & Gamble Company Scrubbing strip for a cleaning sheet, cleaning sheet used therewith, and method of making
US20120277710A1 (en) * 2011-04-26 2012-11-01 Luigi Marinelli Methods of Making Absorbent Members Having Density Profile
US9242406B2 (en) 2011-04-26 2016-01-26 The Procter & Gamble Company Apparatus and process for aperturing and stretching a web
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US9925731B2 (en) 2011-04-26 2018-03-27 The Procter & Gamble Company Corrugated and apertured web
US9452089B2 (en) 2011-04-26 2016-09-27 The Procter & Gamble Company Methods of making absorbent members having density profile
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