Patent Application
20170209315
The present invention relates to disposable pull-on garments comprising one or more spacers.
The present specification discloses disposable absorbent articles comprising central panels comprising absorbent cores. The absorbent articles may also comprise graphics. The disclosed designs of articles herein may be worn by all ages, including infants, toddlers, children, as well as adults.
It may be desirable to run elastics continuously across the core and/or central panel to decrease the appearance of the core and central panel area, which may help to the absorbent article to appear more underwear like. This may be especially important for adult wearers. Running elastics continuously across the core and/or central panel may create too much tension in force zones and/or elastic sections causing the crotch area and areas adjacent to the crotch area to pull in transversely (i.e., to narrow).
Due to this, absorbent articles are often designed with elastics that are cut so they do not run across or continuously across the core or the central panel. Elastics cut in this manner may provide more coverage over the buttocks versus a product with elastics running continuously across the core and/or central panel. Of course, adequate coverage is desired for fit. Beyond fit, for adult incontinence products, adequate coverage is desired to provide comfort and security. Too much tension of a long continuous elastic can cause the portion of the belt adjacent to the transverse axis to narrow and ride up higher on the wearer's back-side compromising fit and causing discomfort.
Instead of cutting elastics to prevent the negatives of continuous elastics across the core and/or central panel, it may be desirable to create spacers between force zones and/or elastic sections in the areas of the front and back belts that overlap with the central panel and/or core. Thus, the area at and just above the leg cutout can benefit from spacers to keep tension from being too concentrated, thus causing narrowing of the front and back panels adjacent to the crotch. This is especially problematic in the back panel where it compromises buttocks coverage. With spacers, the average tension of the elastic zone or section is decreased.
Another benefit of having multiple spacers in the front and/or back belts is the impact it has on graphics. Graphics that overlap spacers are more clear than gathered areas of elasticized zones. Surprisingly, the eye may perceive the overall graphic area as clear even though only a portion of the graphic overlaps the spacer. This may be due to more clearly showing the observer what the design is so that she may extrapolate her understanding of the design to the more gathered areas where the graphic overlaps elastics.
Using a plurality of spacers instead of cutting elastics may simplify the process of making the multi-stranded elastic absorbent articles because it may result in managing less elastics per elastic area or zone.
And, a plurality of spacers may improve the appearance of the article out of the bag, and on the wearer, as the crotch portion of the article is not contracted as much and as the graphics have an improved appearance.
An absorbent article of the present disclosure may comprise a front belt, a back belt, and a central panel comprising an absorbent core, a topsheet, and a backsheet. The central panel may overlaps a portion of the front and back belts. The front and back belts may comprise a plurality of elastics that overlap at least a portion of the central panel, wherein the elastics are disposed such that multiple spacers are formed in each of the front and back belts, and wherein the elastics overlapping the central panel are continuous. The front and back belts may each comprise graphics overlapping at least one of the spacers in the front and the back belts.
The graphics may be printed on a wearer-facing side of an outer nonwoven of each of the front and back belts. The front and back belts may be connected by a longitudinally continuous outer cover nonwoven. The front and back belts may each comprise an inner belt nonwoven and an outer belt nonwoven, wherein the outer belt nonwovens are discrete from one another. The front and back belts may be joined to form side seams, a waist opening, and leg openings in a package comprising a plurality of like articles. The article may be packaged in open form such that no leg openings or waist opening is formed. The multiple spacers in each of the front and back belts may each be from about 5 mm to about 25 mm, or from about 5 mm to about 25 mm.
At least a portion of the graphics in the front and back belts may overlap at least a portion of the plurality of elastics in the front and back belts, such that a portion of the graphics overlapping the spacers in the front and back belts is less distorted than a portion of the graphics overlapping the plurality of elastics in the front and back belts in the article's contracted form.
The plurality of elastics in the front belt may comprise at least two groups of elastics, wherein each group comprises at least 3 elastics, and the plurality of elastics in the back belt may comprise at least two groups of elastics, wherein each group comprises at least 3 elastics. At least one of the two groups of elastics in the front belt may comprise at least 4 elastics. At least one of the two groups of elastics in the back belt may comprise at least 4 elastics.
The plurality of elastics in the front belt may comprise at least three groups of elastics, wherein each group comprises at least 3 elastics or at least 2 elastics. The plurality of elastics in the back belt may comprise at least three groups of elastics, wherein each group comprises at least 3 elastics or at least 2 elastics.
The graphics in the front and back belts may form a waistband graphic. Generally, graphics may be printed on a garment-facing side of an inner belt nonwoven of the front and back belts. Laterally opposed, barrier leg cuffs may extend laterally beyond laterally opposed side edges of the central panel.
While the specification concludes with claims particularly pointing out and distinctly claiming the subject matter which is regarded as forming the present invention, it is believed that the invention will be better understood from the following description which is taken in conjunction with the accompanying drawings in which like designations are used to designate substantially identical elements, and in which:
As used herein, the term “pull-on garment” refers to articles of wear which have a defined waist opening and a pair of leg openings and which are pulled onto the body of the wearer by inserting the legs into the leg openings and pulling the article up over the waist. The term “disposable” is used herein to describe garments which are not intended to be laundered or otherwise restored or reused as a garment (i.e., they are intended to be discarded after a single use and, preferably, to be recycled, composted or otherwise disposed of in an environmentally compatible manner). The pull-on garment is also preferably “absorbent” to absorb and contain the various exudates discharged from the body. A preferred embodiment of the absorbent article is the disposable absorbent pull-on garment, shown in
As used herein, the term “absorbent article” refers to pull-on garments generally worn by infants and other incontinent individuals to absorb and contain urine, feces and/or menses. It should be understood, however, that the term absorbent article is also applicable to other garments such as training pants, incontinent briefs, feminine hygiene garments or panties, and the like.
As used herein, the terms “elastic,” “elastomer,” and “elastomeric” refer to a material which generally is able to extend to a strain of at least 50% without breaking or rupturing, and is able to recover substantially to its original dimensions, accounting for set, after the deforming force has been removed.
As used herein, the term “joined” encompasses configurations whereby an element is directly secured to another element by affixing the element directly to the other element, and configurations whereby an element is indirectly secured to another element by affixing the element to intermediate member(s) which in turn are affixed to the other element.
In the embodiment shown in
Further, graphics of the present disclosure may include an anchoring graphic as described in 13574. In
In the embodiment shown in
The absorbent main body 38 absorbs and contains body exudates disposed on the main body 38. In the embodiment shown in
In the embodiment shown in
In the embodiment shown in
In the embodiment shown in
In the embodiment shown in
A portion or the whole of the main body 38 may be made extensible to a degree greater than the inherent extensibility of the material or materials from which the main body 38 is made, e.g., the backsheet 60. The additional extensibility may be desirable in order to allow the main body 38 to conform to the body of a wearer during movement by the wearer and or to provide adequate body coverage. The additional extensibility may also be desirable, for example, in order to allow the user of a absorbent article including a main body 38 having a particular size before extension to extend the front waist region 26, the back waist region 28, or both waist regions of the main body 38 to provide additional body coverage for wearers of differing size, i.e., to tailor the article to the individual wearer. Such extension of the waist region or regions may give the main body 38 a generally hourglass shape, so long as the crotch region is extended to a relatively lesser degree than the waist region or regions, and may impart a tailored appearance to the article when it is worn. In addition, the additional extensibility may be desirable in order to minimize the cost of the article 10. For example, an amount of material that would otherwise be sufficient only to make a relatively smaller article lacking this extensibility can be used to make an article capable of being extended to adequately cover a wearer that is larger than the unextended smaller absorbent article would fit.
A portion of the main body 38, for example a portion of the chassis in one or both of the waist regions 26, 28 may be made laterally extensible to a maximum extensibility greater than a maximum extensibility of another portion of the main body 38 in the crotch region such that a lateral extension of each of the portions to its maximum extensibility imparts an hourglass shape to the main body 38. In one embodiment, the portion of the main body 38 underlying and/or immediately adjacent one or both of the front and back extensible belts may be made laterally extensible to a maximum extensibility greater than a maximum extensibility of another portion of the main body 38, for example the crotch region, such that a lateral extension of each of the portions to its maximum extensibility facilitates application of the absorbent article onto the body of a wearer by enabling the waist regions to be extended to fit over the wearer's hips and in addition, opening and orienting the leg openings enabling the wearer to place the legs through the openings more effectively.
Additional lateral extensibility in the main body 38 may be provided in a variety of ways. For example, a material or materials from which the main body 38 is made may be pleated by any of many known methods. Alternatively, all or a portion of the main body 38 may be made of a formed web material or a formed laminate of web materials like those described in U.S. Pat. No. 5,518,801 issued on 21 May 1996 in the name of Chappell et al. This formed web material includes distinct laterally extending regions in which the original material has been altered by embossing or another method of deformation to create a pattern of generally longitudinally oriented alternating ridges and valleys and also includes laterally extending unaltered regions between the laterally extending altered regions. The formed web material can be extended in a direction perpendicular to the ridges up to the point where the ridges and valleys flatten with substantially less force than is required to extend beyond that point. In addition to lateral extensibility, the creation of a formed laminate web as described above provides a main body 38 backsheet with improved texture and cloth-like appearance and feel. The deformation creates a cloth-like pattern in the film and increases the loft of the nonwoven in multi-layer film and nonwoven laminate backsheets.
Alternatively, a portion of the absorbent article can be ring-rolled and thus rendered highly extensible as described in U.S. Pat. No. 5,366,782 (issued Nov. 22, 1994 to Curro, et al). Specifically, a ring-rolling apparatus includes opposing rolls having intermeshing teeth that incrementally stretch and thereby plastically deform the material forming the absorbent article (or a portion thereof) thereby rendering the article extensible in the ring-rolled regions. In one embodiment, the absorbent article can be ring-rolled in a portion of at least one of the front or back waist regions, for example the portion of the main body 38 underlying and/or immediately adjacent one or both of the front and back belts 84, 86, while other regions may comprise a structured elastic-like formed web material. The article may be ring-rolled across the entire width in one or both of the waist regions or alternatively may be ring-rolled over only a portion of the main body 38 width or over only a portion of one or both of the belts.
The front laterally central portion and the back laterally central portion of the main body 38 may have a different range of extensibility from other portions of the main body 38. Additionally or alternatively, the laterally central portions may be extensible to a greater or lesser degree when subjected to a given level of opposing tensile forces, i.e., may be more easily or less easily extensible, than other portions of the main body 38.
The main body 38 may comprise a liquid pervious topsheet 58, a liquid impervious backsheet 60 and an absorbent core 62 disposed therebetween. The main body 38 may additionally comprise a barrier leg cuff 64 disposed along the longitudinal side edge 48. The barrier leg cuff 64 provides improved containment of liquids and other body exudates in the crotch region 30. The barrier leg cuff 64 shown in
The liquid pervious topsheet 58 may be positioned adjacent the body-facing surface of the absorbent core 62 and may be joined thereto and/or to the backsheet 60 by any attachment means known in the art. The liquid impervious backsheet 60 is generally that portion of the absorbent article 20 positioned adjacent the garment-facing surface of the absorbent core 62 and prevents the exudates absorbed and contained therein from soiling articles that may contact the absorbent article 20. The absorbent core is positioned between the topsheet 58 and the backsheet 60 and absorbs and retains liquids such as urine and other certain body exudates.
The topsheet 58, the backsheet 60 and the absorbent core may be manufactured any known materials. Suitable topsheet materials may include porous foams; reticulated foams; apertured plastic films; or woven or nonwoven webs of natural fibers (e.g., wood or cotton fibers), synthetic fibers (e.g., polyester or polypropylene fibers), or a combination of natural and synthetic fibers. Suitable backsheet materials may include breathable materials that permit vapors to escape from the diaper while still preventing exudates from passing through the backsheet.
A suitable absorbent core for use in the absorbent article 20 may comprise any absorbent material which is generally compressible, conformable, non-irritating to the wearer's skin, and capable of absorbing and retaining liquids such as urine and other certain body exudates. In addition, the configuration and construction of the absorbent core may also be varied (e.g., the absorbent core(s) or other absorbent structure(s) may have varying caliper zones, hydrophilic gradient(s), a superabsorbent gradient(s), or lower average density and lower average basis weight acquisition zones; or may comprise one or more layers or structures). In some embodiments, the absorbent core may comprise a fluid acquisition component, a fluid distribution component, and a fluid storage component. An example of a suitable absorbent core having a fluid acquisition component, a fluid distribution component, and a fluid storage component is described in U.S. Pat. No. 6,590,136.
The outer cover layer 42 may be disposed on the outer surface 22 of the absorbent article 20 and covers the crotch panel 56 of the absorbent main body 38. The outer cover layer 42 may extend into and cover the front waist panel 52 and the back waist panel 54 of the main body 38. The outer cover layer may form a portion of the backsheet and/or the main body. The outer cover layer 42 may be directly joined to and cover a portion or all of the liquid impervious backsheet 60 of the main body 38. The central panel 80 of the front and back belt 84, 86 may be joined to the front waist panel 52 and the back waist panel 54 of the main body 38 through the outer cover layer 42. Thus, the outer cover layer 42 is disposed between the front and back belt 84, 86 and the liquid impervious backsheet 60 of the main body 38. In one embodiment shown in
The outer cover layer 42 may comprise a material separate from the material of the inner layer 83 and the outer layer 82 constituting the belt 40. The outer cover layer 42 may comprise two or more layers of materials. The outer cover layer 42 may comprise any known materials and may comprise materials used for the front and back belt 84, 86 as explained above. The outer cover layer 42 may comprise a single layer of nonwoven web of synthetic fibers. The outer cover layer 42 may comprise a single layer of hydrophobic, non-stretchable nonwoven material. The outer cover layer may comprise a film, a foam, a nonwoven, a woven material or the like and/or combinations thereof such as a laminate of a film and a nonwoven.
The belt 40 may comprise a front belt 84 and a back belt 86 (hereinafter may be referred to as “front and back belt 84, 86) and has a ring-like configuration by permanently or refastenably connecting the front belt 84 and the back belt 86 at the seams 32 or by permanently or refastenably connecting the front and/or back belt to the main body 38.
The belt 40 may be ring-like and elastic. The ring-like elastic belt 40 extends transversely about the waist opening 36 of the absorbent article 20 and acts to dynamically create fitment forces and to distribute the forces dynamically generated during wear. Applicants have found that improved fit can be created by controlling the distance between, linear density, and the pre-strain of the elastomeric material in relation to each other and to the openings for the body. This may occur by choosing different materials throughout the belt 40 that exhibit desired properties. The different materials are combined at specific distances, linear densities, and prestrains to create a belt 40 that acts to dynamically create fitment forces. This improved fit translates into reduced sagging and or gapping problems around the waist opening. The examples below illustrate various properties of the different portions of the belt embodiments that are suitable:
Each of the elastics 300 in the front and back belts may have the same dtex (e.g., 800) and the same pre-strain (e.g., 120%). The elastics 300 may be in groups of 2, 3, 4, or 5 individual elastic elements. Another suitable embodiment may have each of the elastics of the front and back belts at 680 dtex at 140% strain. Each of the front and back belts may individually comprise 1-10, 2-8, 3-7, or 4-6 spacers 136.
The front and back belt 84, 86 may comprise any known materials. Suitable material for the front and back belt 84, 86 can be manufactured from a wide range of materials such as plastic films; apertured plastic films; woven or nonwoven webs of natural materials (e.g., wood or cotton fibers), synthetic fibers (e.g., polyolefins, polyamides, polyester, polyethylene, or polypropylene fibers), or a combination of natural and/or synthetic fibers; or coated woven or nonwoven webs. The belt may comprise a nonwoven web of synthetic fibers. The belt may comprise a stretchable nonwoven. The belt may comprise an inner hydrophobic, non-stretchable nonwoven material and an outer hydrophobic, non-stretchable nonwoven material.
The belt 40 may comprise a first elastic section 102 and a second elastic section 104 located in the front belt 84. The belt 40 may comprise a third elastic section 106 and a fourth elastic section 108 located in the back belt 86. The first elastic section 102 and the fourth elastic section 108 are adjacent to the waist opening 36. The second elastic section 104 and the third elastic section 106 are adjacent to the leg openings 34. The first elastic section 102 may comprise of 20 percent to 80 percent, 25 percent, 40 percent, 50 percent, 60 percent, 70 percent of the longitudinal direction length of the front belt 84. The second elastic section 104 may comprise of 20 percent to 80 percent, 25 percent, 40 percent, 50 percent, 60 percent, 70 percent of the longitudinal direction length of the front belt 84. The third elastic section 106 may comprise of 20 percent to 80 percent, 25 percent, 40 percent, 50 percent, 60 percent, 70 percent of the longitudinal direction length of the back belt 86. The fourth elastic section 108 may comprise of 20 percent to 80 percent, 25 percent, 40 percent, 50 percent, 60 percent, 70 percent of the longitudinal direction length of the back belt 86.
The belt 40 may comprise a front border between the first elastic section 102 and a second elastic section 104, and the front border may be located within 5 mm, 10 mm, 20 mm, 30 mm 40 mm, 50 mm from the front edge of the absorbent core. The belt 40 may comprise a back border between the third elastic section 106 and a fourth elastic section 108, and the back border may be located within 5 mm, 10 mm, 20 mm, 30 mm 40 mm, 50 mm from the back edge of the absorbent core.
The belt 40 may comprise a first force zone 110, a second force zone 112, a third force zone 114, a fourth force zone 116, a fifth force zone 118, and a sixth force zone 120 located in the front belt 84. The first force zone 110, second force zone 112, and third force zone 114 may be located in the first elastic section 102. The fourth force zone 116, fifth force zone 118, and sixth force zone 120 may be located in the second elastic section 104. The first force zone 110, second force zone 112, third force zone 114, fourth force zone 116, fifth force zone 118 and sixth force zone 120 may comprise a transverse force of 0 to 10 N/zone. The force in a zone may also change between the center of the belt 40 and the left and right longitudinally extending side edges 48.
The first force zone 110 is disposed adjacent to the waist opening 36. The sixth force zone 120 is disposed adjacent to the leg opening 34. The first force zone 110, second force zone 112, and at least part of the third force zone 114 are located within upper two thirds of the front belt width, toward the waist opening along the longitudinal axis. At least part of the fourth force zone 116, fifth force zone 118, and sixth force zone 120 are located within lower two third of the front belt width, toward the leg opening 34.
The belt 40 may comprise a seventh force zone 122, a eight force zone 124, a ninth force zone 126, a tenth force zone 128, a eleventh force zone 130, and a twelfth force zone 132 located in the back belt 86. The seventh force zone 122, eight force zone 124, and ninth force zone 126 may be located in the third elastic section 106. The tenth force zone 128, eleventh force zone 130, and twelfth force zone 132 may be located in the fourth elastic section 108. The seventh force zone 122, eighth force zone 124, ninth force zone 126, tenth force zone 128, eleventh force zone 130 and twelfth force zone 132 may comprise a transverse force of 0 to 10 N/zone. The seventh force zone 122 is adjacent to the leg opening 34. The twelfth force zone 132 is adjacent to the waist opening 36. The seventh force zone 122, eighth force zone 124, and at least part of the ninth force zone 126 are located within lower two third of the back belt width, toward the leg opening 34. Force zones may be equally distanced throughout the belt along the longitudinal axis in the front and back belts 84, 86. Force zones may also be unequally distanced throughout the belt along the longitudinal axis in the front and back belts 84, 86. Force zones may have varying width and length. Force zones may be continuous or discontinuous, as for example, when disrupted by the main body 38 and/or absorbent core.
The front belt 84 may comprise 5 to 50 elastic strands. The front belt 84 may comprise 10 to 20 elastic strands. The back belt 86 may comprise 5 to 50 elastic strands. The back belt 86 may comprise 10 to 20 elastic strands. The elastic strands are distributed amongst the different force zones. Elastic strands may be distributed evenly amongst the force zones. Elastic strands may also be distributed unevenly amongst the different force zones. Each force zone comprises at least one elastic strand.
The elastic strands may have a linear density between 200 to 2500. Linear density is the density of the elastic fibers in the elastic strand. The most commonly used unit for the linear density is the decitex, abbreviated “dtex,” which is the mass in grams per 10,000 meters. The linear density may be used to change the force profile. For example, one could reach a desired force profile by selecting the linear density of a single elastic strand, combining multiple elastic strands with a smaller linear density in close proximity to each other, and/or combining with other elastomeric materials.
The elastic strands may have an elastic pre-strain. The elastic pre-strain is the percent of length increase in an elastic strand or plurality of elastic strands at the point of combining the elastic(s) with the first and/or second belt layers. For example a strand with a free length of 15 centimeters (cm) may have a load applied such that the 15 cm elastic strand is now 18 cm long. This length increase of 3 cm is 20% of 15 cm ( 3/15), or a 20% strain. The elastic pre-strain may be used to change the force profile of a single elastic strand or a plurality of elastic strands. Force profiles may also be changed by changing the linear density in conjunction with the elastic pre-strain of one or more elastic strands.
The elastic pre-strain of the eighth force zone 124 found in the third elastic section 106 of the back belt 86 may be greater than, equal to, or less than the elastic pre-strain of both the seventh force zone 122 and the ninth force zone 126. The elastic pre-strain of the eleventh force zone 130 found in the fourth elastic section 108 of the back belt 86 may be greater than, equal to, or less than the elastic pre-strain of both the tenth force zone 128 and the twelfth force zone 132.
The linear density of the elastic in the eighth force zone 124 found in the third elastic section 106 of the back belt 86 may be greater than, equal to, or less than the linear density of the elastic in one or both of the the seventh force zone 122 and the ninth force zone 126. The linear density of the elastic in the eleventh force zone 130 found in the fourth elastic section 108 of the back belt 86 may be greater than, equal to, or less than the linear density of the in one or both the tenth force zone 128 and the twelfth force zone 132.
The force of the first elastic section 102 may not be equal to the second elastic section 104. The force of the third elastic section 106 may not be equal to the fourth elastic section 108. Elastics located in the fourth elastic section 108 transversely cover substantially the whole section continuously. Elastics located in the third elastic section 106 may be laterally interrupted by the main body 38 and/or absorbent core.
The number of elastic strands in each zone may be changed according to the placement of the absorbent core. Applicants have found that the use of thinner absorbent cores may lead to a need in increased elastic force to compensate for the change in article thickness. The force profile must be adjusted depending on the location and thickness of the absorbent core. This particularly affects the second elastic section and third elastic section.
The elastic strands disposed in the belt may be aligned in a curved fashion so that the a tangent of the curve of the elastic strands may form an acute angle with the centerline or may form an arcuate shape. This may allow for targeting the force profile and/or coordinating print and elastication/rugosities/elastics in the stretch sections.
The eight force zone 124 of the third elastic section 106 contains a greater or equal force profile than the seventh 122 and ninth 126 force zones. The eleventh force zone 130 of the fourth elastic section 108 contains a greater or equal force profile than the tenth 128 and twelfth 132 force zones.
The gaps between the elastic strands may be 3 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, or 22 mm. The gap between elastic strands in the second force zone 112 and the eleventh force zone 130 may be larger than the gap between elastic strands in the first 110 and third 114 force zones or the tenth 128 and twelfth 132 force zones, for example, 20 mm. The gap between the twelfth force zone 132 and the waist opening 36 may be between about 15 mm to 40 mm. The gaps also apply to the gaps between transversely extending elements of a scrim material matrix.
A spacer 136a between the first elastic section 102 and the second elastic section 104 may be at least 1.5, 2, 3, or 4 times greater than the average spacing of the elastics disposed in one or both of the elasticity sections. A spacer 136 between the third elastic section 106 and the fourth elastic section 108 may be at least 1.5, 2, 3, or 4 times greater than the average spacing of the elastics disposed in one or both of the other elasticity sections. A spacer 136b may also be between at least two alternating zones in the front belt portion 84 and the back belt portion 86. The spacer 136 may be least 1.5, 2, 3, or 4 times greater than the average spacing of the elastics disposed in one or both of the elasticity sections. Spacers may be 5 mm to 25 mm, 7 mm to 20 mm, 10 mm to 15 mm, and/or 12 mm to 13 mm in the longitudinal direction.
As shown in
Spacers nearest the leg edge and below the lower end of the side seam (e.g., 136k) in the back belt may be most valuable for relieving stress in the portion of the belt responsible for buttocks coverage. As such, it may be desirable that a top half (longitudinally from the waist edge to a mid-point of the back belt) of the back belt is higher in force profile than a bottom half (longitudinally from the leg edge to a mid-point of the back belt) of the back belt—the same force profile dynamic may be true for the front belt. A higher force profile in the top half of the back belt and a lower force in the bottom half of the back belt may be desirable for wearers having a body mass index (“BMI”) greater than 32, as such wearers often have a need for greater buttocks coverage. The opposite may be true for lower BMI (32 or lower) wearers, where the back belt has a higher force profile in the bottom half of the back belt and a lower force profile in the top half of the back belt.
As shown in
Applicants have surprisingly found that by changing the force profile throughout one or both of the front and back portions of the belt 84, 86 so that the second force zone 112, fifth force zone 118, eighth force zone 124, and eleventh force zone 130 have a greater force profile than the adjacent zones creates an improved fit and comfort of the absorbent article. The force profile described translates into an improved fit with reduced sagging and or gapping problems around the waist opening. The gap mentioned in the paragraph immediately above allows for the caregiver or user to easily apply and remove the absorbent article. This profile can similarly be represented by alternate high low force profile force zones. An increased force profile of the second force zone 112 also allows the caregiver or user to stretch the absorbent article with less force since the force profile of the first force zone 110 is less than that of the second force zone 112.
The absorbent articles of the present disclosure may be placed into packages. The packages may comprise polymeric films and/or other materials. Graphics and/or indicia relating to properties of the absorbent articles may be formed on, printed on, positioned on, and/or placed on outer portions of the packages. Each package may comprise a plurality of absorbent articles. The absorbent articles may be packed under compression so as to reduce the size of the packages, while still providing an adequate amount of absorbent articles per package. By packaging the absorbent articles under compression, caregivers can easily handle and store the packages, while also providing distribution savings to manufacturers owing to the size of the packages.
Accordingly, packages of the absorbent articles of the present disclosure may have an In-Bag Stack Height of less than about 100 mm, less than about 95 mm, less than about 90 mm, less than about 85 mm, less than about 85 mm, but greater than about 75 mm, less than about 80 mm, less than about 78 mm, less than about 76 mm, or less than about 74 mm, specifically reciting all 0.1 mm increments within the specified ranges and all ranges formed therein or thereby, according to the In-Bag Stack Height Test described herein. Alternatively, packages of the absorbent articles of the present disclosure may have an In-Bag Stack Height of from about 70 mm to about 100 mm, from about 70 mm to about 95 mm, from about 72 mm to about 85 mm, from about 72 mm to about 80 mm, or from about 74 mm to about 78 mm, specifically reciting all 0.1 mm increments within the specified ranges and all ranges formed therein or thereby, according to the In-Back Stack Height Test described herein.
The in-bag stack height of a package of absorbent articles is determined as follows:
Equipment
A thickness tester with a flat, rigid horizontal sliding plate is used. The thickness tester is configured so that the horizontal sliding plate moves freely in a vertical direction with the horizontal sliding plate always maintained in a horizontal orientation directly above a flat, rigid horizontal base plate. The thickness tester includes a suitable device for measuring the gap between the horizontal sliding plate and the horizontal base plate to within ±0.5 mm. The horizontal sliding plate and the horizontal base plate are larger than the surface of the absorbent article package that contacts each plate, i.e. each plate extends past the contact surface of the absorbent article package in all directions. The horizontal sliding plate exerts a downward force of 850±1 gram-force (8.34 N) on the absorbent article package, which may be achieved by placing a suitable weight on the center of the non-package-contacting top surface of the horizontal sliding plate so that the total mass of the sliding plate plus added weight is 850±1 grams.
Test Procedure for In-Bag Stack Height
Absorbent article packages are equilibrated at 23±2° C. and 50±5% relative humidity prior to measurement.
The horizontal sliding plate is raised and an absorbent article package is placed centrally under the horizontal sliding plate in such a way that the absorbent articles within the package are in a horizontal orientation (see
A suitable tensile tester such as an MTS Alliance with MTS Testworks version 4.0 or equivalent instrument is used. The tester is equipped with flat clamps that are capable of holding at least the entire transverse length of the side seam should be used. The instrument is calibrated according to the manufacturer's specification. Testing is performed at 23° C.±2° C. and 50%±2% relative humidity.
The side seams of the product are broken to separate the front belt from the back belt. The respective force zones (as described in the Detailed Description of the Invention) are cut away from these belts. Each separated section of the front and back belt will be referred to as a “test sample” herein. All material layers, including the chassis components, should be kept with the test sample. All cut lines are straight, parallel to the transverse direction of the absorbent article. Each test sample needs to have at least one elastomeric material. The widths (a dimension in the longitudinal direction of the absorbent article) of the respective zones are measured.
The length of the test sample is determined. The length measures in the transverse direction of the absorbent article a distance from one end to the other end of a test sample in a fully stretched condition. The fully stretched condition is the condition where the test sample is stretched by the force of 0.1 N/mm multiplied by the width of the test sample. If one or both ends of a test sample are not parallel to the longitudinal direction, the shortest length within the test sample is considered as the length of the test sample.
An adjusted test sample length is defined such that the length of a test sample minus the combined length of any material in the upper and lower clamps. Thus, if a test sample is mounted in the clamp so that 10 mm at each end is held in the clamps, then the adjusted belt length is the measured belt length minus 20 mm.
The test samples are kept unstretched at least for 10 min before the test.
For each test sample, the initial gauge length of the tensile tester is set to allow the test sample to be mounted in a relaxed state. The load cell is zeroed to offset the sample weight.
The test sample is stretched in the transverse direction of the absorbent article at a rate of 254 mm/min, and a load (N) is measured within 5 sec after the test sample reaches at 65% of the adjusted test sample length. The transverse force is calculated for each of the force zones according to an equation:
A transverse force (N/mm) of a test sample=Measured value (N)/width of the force zone (mm)
The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numeral values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm”.
All documents cited in the Detailed Description of the Invention are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the present invention. To the extent that any meaning or definition of a term in this written document conflicts with any meaning or definition of the term in a document incorporated by reference, the meaning or definition assigned to the term in this written document shall govern.
While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
This application claims the benefit, under 35 USC 119(e), to U.S. Provisional Patent Application No. 62/286,662 filed on Jan. 25, 2016, which is herein incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 62286662 | Jan 2016 | US |
