MXPA99005476A - A diaper having perfume zones - Google Patents
A diaper having perfume zonesInfo
- Publication number
- MXPA99005476A MXPA99005476A MXPA/A/1999/005476A MX9905476A MXPA99005476A MX PA99005476 A MXPA99005476 A MX PA99005476A MX 9905476 A MX9905476 A MX 9905476A MX PA99005476 A MXPA99005476 A MX PA99005476A
- Authority
- MX
- Mexico
- Prior art keywords
- perfume
- binder
- microcapsules
- diaper
- release agents
- Prior art date
Links
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Abstract
The present invention relates to an absorbent article and preferably a diaper or incontinent device having perfume zones disposed on the backsheet outer surface or on a backing member attached to the backsheet outer surface. The perfume zones generally comprise a binder having release agents of one or more types dispersed therethrough. Additionally, the perfume zones contain pull-strips attached to the binder which, when detached from the binder, will cause perfume to be released from the release agents either by shearing of the agents or diffusion as a result of uncovering the binder. The perfume provides the functions of either masking and/or absorbing malodors and are released via fragrance burst, and/or diffusion over time. Furthermore, perfume is released either at attachment of the article about a wearer, at removal of the article from about a wearer and/or during sustained wear of the article about a wearer.
Description
A PANAL THAT HAS ZONES WITH PERFUME
FIELDS OF THE INVENTION
The present invention relates to an absorbent article having areas with perfume on the outer surface of its backsheet. The perfume areas generally comprise a binder having perfume release agents therein. The binder is attached to the outer surface of the backsheet of the absorbent article or attached to a separate backing member. A pull strip covers the opposite surface of the binder, thus keeping the release agents therein. When the pull strip is disengaged, the release agents provide a fragrance discharge and / or diffuse perfume release.
BACKGROUND OF THE INVENTION
A wide variety of fluid-absorbing structures known in the art absorb body fluids such as blood, urine, menstruation and the like, and are sanitary and convenient to use. Disposable products of this type generally comprise a fluid-permeable upper sheet material, a fluid-absorbent core, and a fluid-impermeable backsheet material. Various shapes, sizes and thicknesses of these items have been explored in an attempt to make their use more comfortable and convenient. Odor control in medical devices has been under investigation for many years. -Many of the body fluids have an unpleasant smell or develop these odors when they are in contact with air and / or bacteria during periods
prolonged Several odor controlling agents have been discovered in the literature. For example, U.S. Patent No. 4,525,410, Hagiwara et al., Issued July 25, 1985, teach that zeolite particles (stimulated with bactericidal cations), stably maintained in a fibrous web incorporating some portion of fusible fibers. In the plot and applying heat Hagiwara and others teaches the use of these compositions as the outer covering layer in general sanitary ware. U.S. Patent No. 2,690,415 F. A Shuler issued September 28, 1954, teaches particles of odor absorbing material uniformly fixed in the interstices of a permeable web by adhesive to provide an odor-absorbing medium, example, in catamenial products. Particulate carbon, silica gel and activated alumina are indicated. The deviation and / or displacement of the particles is avoided and the sheet is flexible. U.S. Patent No. 5,429,628, issued July 4, 1995 to Trinh et al., Teaches the incorporation of odor absorbing or fragrance releasing particles into the absorbent core or into the topsheet of an absorbent article. The particles are preferably activated by the presence of moisture from a user through the topsheet and the absorbent core. ABSCENTS (Union Carbide odor control molecular size) for use in diapers and catamenial products are specifically indicated in the brochure
Union Carbide (A.J. Gioffre 1988). The brochure states that Union Carbide's commercial research showed the potential benefits of these products. U.S. Patent Nos. 4,795,482 and 4,826,497, relating to ABSCENTS used as an odor controlling agent, generally, and in particular in medical devices.
BRIEF DESCRIPTION OF THE INVENTION
Accordingly, the present invention provides a diaper comprising a fluid pervious topsheet, a fluid impermeable backsheet having an inner surface and an outer surface. The backsheet is attached to the top sheet, and an absorbent core is located between the top sheet and the back sheet. There is at least one area with perfume located on the outer surface of the backsheet. The area with perfume comprises a binding agent, which has release agents in there, which are attached to the outer surface of the back sheet. Also, the perfume zone comprises a pull strip that is attached to the outer surface of the backsheet through the binder that is dispersed therein to the release agents. Preferably, the pull strip substantially covers the binder. Also, the release agents therein are preferably microcapsules of one or more functions and / or types; that is, to discharge fragrances, diffuse or absorb the bad smell. Preferably, the functions of perfume release, odor concealment and / or odor absorption of the release agents are not activated until the pull strip member is peeled off. In another embodiment of the present invention, a zone with perfume additionally comprises a backing member that is attached to the outer surface of the backsheet. The binder is then bonded, i.e., coated on the backing member having the release agents dispersed there, and the pull strip is attached to the backing member with the binder therebetween. In a preferred embodiment of the tensile strips of the present, the edges of the pull strip extend beyond the edges of the binder. In addition, those extended edges of the pull strip are sealed to the outer surface of the backsheet and / or to the backing member such that a continuous or quasi-continuous seal is formed.
around the agglutinator. The release agents comprise perfumes selected from the group consisting of non-complex cyclodextrins, volatile perfumes, fragrances, essences, zeolites, activated carbons and mixtures thereof. In the present invention, one or more traction strips can be disengaged during at least one of three times; that is, in the attachment of a diaper around a wearer in the disunion of a diaper of a wearer and during the sustained use of a diaper.
BRIEF DESCRIPTION OF THE DRAWINGS
Although the description concludes with the claims pointing out in a particular way and claiming differently to the exposed matter that is considered as formant of the present invention, it is believed that the invention will be better understood from the following descriptions, which are taken in combination with the accompanying drawings in which similar designations are used to designate substantially identical elements and in which: Figure 1 is a plan view of a disposable diaper embodiment of the present invention having portions cut away to reveal the structure underlying, the outer surface of the diaper facing the observer. Figure 1A is a side view of a type of perfume zone described herein. Figure 1B is a side view of the perfume zone of Figure 1A during uncoupling of the pull strip from the perfume zone; Figure 2 is a side view of another type of perfume zone of the present, showing a type of microcapsule before uncoupling the pull strip from the perfume zone.
Figure 2A is a side view of the area with perfume shown in Figure 2 when uncoupling the pull strip from the perfume zone; Figure 3 is a side view of the perfume zone with two types of microcapsules therein before uncoupling the pull strip from the perfume zone. Figure 3A is a side view of the perfume zone of Figure 3 when uncoupling the pull strip from the perfume zone. Figure 4 is a plan view of an alternative embodiment of a disposable diaper of the present invention having multiple zones with perfume.
DETAILED DESCRIPTION OF THE INVENTION
As used herein, the term "diaper" refers to an absorbent article generally worn by infants and incontinent persons which is worn around the wearer's lower torso, which absorbs and contains body exudates and, more specifically, refers to to devices that are placed against or near the user's body. The term "disposable" is used herein to describe absorbent articles that are not intended to be washed or otherwise restored or reused as an absorbent article (ie, they are intended to be discarded after a single use, and , preferably to be recycled, composted or otherwise disposed in an environmentally compatible manner). The term "perfume" or "encapsulated agents", as used herein, refers to odor absorbing and / or hiding agents that include volatile perfumes, essences, fragrances, zeolites, activated carbon, cyclodextrins, mixtures thereof and the like, which are placed inside microcapsules in the form of release agent that are subsequently discharged by mechanical cutting forces and / or discovered to release the perfume as a result of diffusion. The term "agent
"release", as used herein, refers to any suitable means known in the art for the containment and release of perfume as described herein.The term "microcapsules" or "microspheres", as used herein, refers to a type of release agent and / or containment assembly for retaining and subsequently distributing the perfume The term "perfume-filled", as used herein, refers to the release agents that are partially full as defined herein. "fragrance discharge", as used herein, refers to the immediate release of the perfume resulting from the opposite discharge to the uncovered release agents containing the perfume. The term "diffused" or "continuous state" as used herein, refers to a substantially continuous release of perfume starting from the term "embedded" is understood herein as the integration or assurance of a material within another material, adjacent to another material, and / or on another material, for example, release agents embedded within a binder. Preferably, the release agents for all embodiments disclosed herein are one of several types of microcapsules disclosed herein. In the type of microcapsule that is broken or ruptured, at least one opening will be created on the surface of the previously unopened microcapsule through which it will diffuse the perfume through one of the mechanisms described herein (e.g. fragrance, continuous state broadcast, etc.). Alternatively, the microcapsule may be a substantially filled porous structure, which releases perfume through one or more of the disclosed mechanisms as the microcapsule is discovered and is thus exposed to the atmosphere. By the term "uncovered uncovered", it is hereby understood that a structure that has previously been substantially and / or totally enclosed from air exposure by a cover means is now exposed; for example, wherein the pull strip member substantially
covers the release agents embedded within an area with perfume. Also alternatively, at least a plurality of microcapsules of the present absorb odors in addition to or emit the perfume through the mechanisms disclosed herein such as in a fragrance discharge. Figure 1 is a plan view of the diaper 20 of the present invention in its flattened, non-contracted state (ie, with the elastic-induced contraction, pulled outward), with parts of the structure being cut out, to show more clearly the construction of the panel 20, and with the part of the diaper 20 that gives away from the wearer, the outer surface 52, facing the observer. As shown in Figure 1, the cloth! 20 comprises a containment assembly 22 preferably comprising a top sheet
24 liquid-permeable, a liquid-impermeable backsheet 26 attached to the topsheet 24, and an absorbent core 28 positioned between the topsheet 24 and the backsheet 26. The diaper preferably further comprises elasticized leg cuffs 30, elasticated waistbands 32; and a fastening system 40, comprising a pair of first clamping members 42 and a second clamping member 41. The diaper 20 is shown in the Figure
1 to have an outer surface 52 (facing the observer in Figure 1), an inner surface 50 (not shown) opposite the outer surface 52, a front waist region 54, a rear waist region 56 longitudinally opposite to the front waist region 54, a crotch region 58 positioned between the front waist region 54 and the rear waist region 56, and a periphery that is defined by the outer perimeter or edges of the diaper 20, in which the longitudinal edges are 60 designate and the end edges are designated 62. The inner surface 50 of the diaper 20 comprises that portion of the diaper 20 that faces the wearer's body during use (i.e., the inner surface 50 is generally formed by at least a portion of the diaper 20). the upper sheet 24 and other components attached to the upper sheet 24). The outer surface 52 of the diaper 20 comprises that part
of the diaper 20 which gives away from the wearer's body during use (i.e., the outer surface 52 is generally formed by at least a portion of the backsheet and other components attached to the backsheet 26). As used herein, the term "attached" encompasses configurations by means of which one element is directly secured to the other element by fixing the element directly to the other element, and configurations by which the element is indirectly secured to the other element by fix the element to a member or intermediate members which in turn are fixed to the other element. The front waist region 54 and the rear waist region 56 extend from the extreme edges 62 of the periphery • to the crotch region 58. The diaper 20 also has two center lines, a longitudinal center line
100 and a transverse center line 102. The term "longitudinal", as used herein, refers to a line, axis or direction in the plane of the diaper 20 that is generally aligned with (eg, approximately parallel to) a plane. vertical that divides a user standing in left and right halves when using the diaper 20. The terms "transverse", "lateral", as used herein, are interchangeable and refer to a line, axis or direction that is located within the plane of the diaper 20 which is generally perpendicular to the longitudinal direction (which divides the user into front and rear body halves). The containment assembly 22 of the diaper 20 is shown in Figure 1, as comprising the main body (chassis) of the diaper 20. The containment assembly 22 comprises at least one absorbent core 28 and preferably an outer cover layer comprising the top sheet 24 and the backsheet 26. When the absorbent article comprises a separate fastener and liner, the containment assembly 22 generally comprises the fastener and the liner (i.e., the containment assembly 22 comprises one or more layers of material to define the fastener, while the liner comprises an absorbent composite such as a top sheet, a back sheet,
and an absorbent core). For the unitary absorbent articles, a containment assembly 22 comprises the main structure of the diaper with other additional features to form the composite diaper structure. In this way, the containment assembly 22 for the diaper 20 generally comprises the topsheet 24, the backsheet 26, and the absorbent core 28. Figure 1 shows a preferred embodiment of the containment assembly 22 in which the topsheet 24 and the backsheet 26 have length and width dimensions generally greater than those of the absorbent core 28. The topsheet 24 and the backsheet 26 extend beyond the edges of the absorbent core 28 to thereby form the periphery of the diaper 20. Although the top sheet 24, back sheet 26 and absorbent core
28 can be assembled in a variety of well-known configurations, preferred diaper configurations are generally described in U.S. Patent No. 3,860,003 entitled "Shrinkable side portions for disposable diaper", which was issued to Kenneth B. Buell on April 14 January 1975; and U.S. Patent No. 5,151,092 entitled "Absorbent article with elastic dynamic waist feature having a predisposed elastic flexure joint", which was issued to Kenneth B. Buel! he
September 29, 1992, each of which is incorporated herein by reference. In a preferred embodiment, Figures 1A and 1B show that the agglutinator containing microcapsules 82 is attached directly to the outer surface 52 or to the garment surface of the backsheet 26. The pull strip 80 is placed directly on the binder 82 and it is united to this one. The pull strip 82 will preferably completely cover the binder 82. In a preferred application of all embodiments disclosed herein, the pull strip 80 will not only completely cover the binder 82 but will also have edges extending beyond the edges of the binder 82. The extended edges of the pull strip 80 will preferably be attached directly to the
opposing surface of any of the outer surface of the backsheet 52 (see Figures 1A and 1B), or backing member 88 (See Figures 2A and 2B), thereby forming a continuous or semi-continuous seal around the total agglutinator 82 . This preferred seal serves to restrict the release of any of the perfumes disclosed herein, and to protect the binder 82 from the microcapsules 70 from external substances, e.g., water, dust and to provide the greatest possible release of perfume at the discretion of the users In one embodiment, the extended edges of the pull strip 80 are attached to the outer surface of the backsheet 52 or the backing member 88 by an adhesive. In another example of the above union a vacuum seal is formed using the extended edges of the pull strip 80 to seal the binder 82. In another alternate embodiment, Figures 2 and 2A disclose in part an area with perfume 85 comprising a member of backing 88 attached directly to the outer surface of the backsheet 26. That is, the backing member 88 is an independent member directly attached to the outer surface 52 of the backsheet that is not preferably removable when separating the pull strip 80. of the agglutinator 82. Additionally, the perfume zone 85 comprises a microencapsulated agglutiner 82 that is bonded to the surface of the backing member and attached to a pull strip 80 on the opposite surface. By the term "microencapsulation", it is hereby implied that the agglutinator comprises a plurality of microcapsules therein. The binder 82 is secured to the surface of the perfume 90 and joins the pull strip 80 to the backing member 88. The binder 82 preferably substantially comprises a plurality of release agents 65, preferably being microcapsules 70, which are activated upon release the pull strip 70 of the zone with perfume 85. By activated, it is hereby meant that the release agents 65 are broken to release perfume and / or exposed to release perfume by any of the mechanisms discussed herein ( for example, by
discharge of the fragrance). The present invention comprises two methods by which odors can be at least partially subjected. These are odor masks and odor absorbers. These two mechanisms that provide odor concealment are perfumes released through a discharge of fragrance or diffusion of perfume over time. When the perfume is released, either by any of these methods, the bad odors tend to be masked by the higher intensity perfume. The intensity or resistance of the perfume does not form part of the invention but increases or decreases at the discretion of a manufacturer. In contrast, odor absorbers, such as cyclodextrin or activated carbon, serve to enclose odors within their molecular structures in such a way that malodorous molecules are not discovered by almost the human sense of smell (if not all). Figures 1A, 1B 2 and 2A schematically illustrate a mechanism that is believed to be an operative mechanism in ensuring that a quantity of controlled perfume 95 is released from the release agents 65. Referring to the non-separated portion.
103 of the pull strip 80, it can be seen that a portion of at least some of the microcapsules 70 are at least partially embedded within a non-sticky binder 82. By "non-sticky" binder, it is meant in the present that the agglutinator, while causing the release agents 65 (eg, the microcapsules 70), to be embedded therein, will not substantially stick other surfaces such as a user's clothing or the wearer's body when the strip has been released. traction 80 before or during the use of a diaper. Specifically, when the person placing the diaper disengages the pull strip 80 and thus discovers the area with perfume 85 having on it an exposed non-sticky binder 82, that binder 82 will not stick to any garment that is worn adjacent to or on the diaper. Referring now to
the separated portion 102 of the pulling strip 80, it can be seen that the effects of separating the pulling strip 80, produces a cutting force through the upper parts of the microcapsules 70 which facilitate their breaking, thus releasing the 95 perfume, contained in there. Note in Figures 1A and 1B which describe the agglutinator 82 being directly attached to the outer surface 52 of the backsheet 26. This is a preferred embodiment. Conversely, Figures 2 to 3A show that the binder 82 is attached to a backing member 88. The backing member 88 is an independent member that is attached to the outer surface 52 of the backsheet 26. Those factors that control the number of broken microcapsules 70 and consequently the amount of fragrance 95 released, are totally within the control of the discretion of the manufacturer through the manipulation of these parameters such as the size and thickness of the wall of the microcapsules, the type of agglutinator used, the amount of binder used, the amount and type of perfume used, the breaking strength of the microcapsules, the number and distribution of the microcapsules, the adhesive strength of a binder in relation to the breaking strength of the microcapsules , and other of these factors that can affect the breakdown of the microcapsule. In one example, it is believed that both of the forces required to disengage a pull strip 80 from a binder 82 must be greater than the force required to break a microcapsule embedded within a binder 82. If this condition is satisfied, the microcapsules less partially imbibed within the perfume zone 85 by a binder 82 will break due to the cutting of the outer surfaces. In another example, the microcapsules 70 of size 50 microns or larger should be easily broken by separating the pull strip 80 from the perfume zone 85 because of the increased effects on the adherent and cohesive properties of a binder in contact with the microcapsules 70. A binder 82
preferably it will form a bond to the surface 90 of the perfume 85 area. In one embodiment, the binder will also have microcapsules 70 that are at least partially embedded therein. A pull strip 80, preferably comprising polyethylene, polypropylene, a non-woven material and / or a cellulosic material (these are also suitable materials for the backing member 88), will preferably substantially cover the area with perfume 85. The strip of traction 80 will settle on the side of the agglutinator that is opposite the surface of the fragrance zone 85. The pull strip 80 will form a junction with the binder 80 such that when the pull strip is pulled apart, i.e. of the area with perfume 85, the microcapsules 70, will break thereby providing a fragrance discharge. While not wishing to be bound by any particular theory, it is believed that the disengagement of the pull strip 80 cuts the microcapsules 70 capable of breaking by uncoupling the pull strip from the perfume zone 85, thereby releasing its perfume immediately. It is almost desirable to have a binder or absolute cohesion strength of which it is less than its adhesion strength to the surface of the scent zone 85. In another embodiment of the present invention, the binder 82 at least partially comprises release agents 65 which release in a widespread manner the perfume over time, for example, odor absorbers. As in the previous embodiment, the pull strip 80 is disengaged from the binder 82, thereby uncovering the release agents there for exposure to the atmosphere. These types of release agents can be combined with the type of breakable release agents, which provide both a fragrance discharge and the release of perfume diffused over time. A binder 82 carrying microcapsules 70 can be coated on a part of the adherent surface of the perfume zone 85. This binder is preferably the only bonding material between the pull strip 80, the bonding agents
release 65 and the surface of perfume 90. If any amount of effective adhesive is present in the areas where the microcapsules 70 are deposited with the intention of having them removable and not break due to the separation of the pull strip 80 from the area with perfume 85, it is then preferable that the cohesion strength of this adhesive be less than the breaking strength of the microcapsules 70. Figures 3 and 3A schematically illustrate a similar mechanism as in Figures 2 and 2A, which is believed to be a operating mechanism to ensure that the microcapsules 72, which either diffuse the perfume over time or the microcapsules 74 that release substances that can absorb bad odors are activated. As in Figures 2 and 2A the pull strip 80 is released from the area with perfume 85, thereby exposing the microcapsules 72 and 74. The microcapsules 72 and 74 are shown here together for simplicity, however, the embodiments they may comprise any combination of microcapsule types disclosed herein for any type of multi-purpose purpose; for example, one embodiment may comprise all three types of microcapsule (70, 72 and 74) or may comprise any combination of two types, or just one type. This preference is at the discretion of the manufacturer. Figure 4 discloses an alternative embodiment in which a plurality of areas with perfume 85 can be applied on the outer surface 52 of the backsheet 26 of a diaper 20. There is no fixed number in how how the areas with perfume can be applied to a part of the outer surface 52 of the backsheet. The number of areas with fragrance assigned is fully within the scope of the manufacturer. An area with fragrance 85 may be of any shape and configuration as deemed desirable by a manufacturer. Also, the size with an area with perfume is not fixed but is within the limitations of a manufacturer's design. Of course, all sizes, numbers and configurations of this must be compatible and within limits and sizes
of a diaper. Referring again to Figure 1, diaper 20 also comprises a fastening system 40 having first fastening members 42 preferably comprising fastening tabs and a second fastening member 41 that could attach to each other to form a side closure, which maintains the front waist region 54 and the rear waist region 56 in an overlapping configuration such that lateral stresses are maintained around the circumference of the diaper, to maintain the diaper on the wearer. Exemplary fastening systems are disclosed in U.S. Patent No. 4,846,8165 entitled "Disposable diaper having an improved fastening device", issued to Scripps on July 11, 1989; United States patent
No. 4,894,060, entitled "Disposable diaper with improved hook fastening portion", issued to Nestegard on January 16, 1990; U.S. Patent No. 4,946,527 entitled "Pressure-sensitive adhesive fastener and method for making the same", issued to Battrell on August 7, 1990; U.S. Patent No. 3,848,594 entitled "Disposable diaper tape fastening system", issued to Buell on November 19, 1974; U.S. Patent No. 4,662,875 entitled "Absorbing Article", issued to Hirotsu et al. on May 5, 1987; and the previously referenced hereby United States patent application Serial No. 07 / 715,152 each of which is incorporated herein by reference. Examples of suitable adhesive tape tab fastening systems are disclosed in U.S. Patent No. 3,848,594 issued to Buell on November 19, 1974; U.S. Patent No. 4,662,875 issued to Hirotsu and Robertson on May 5, 1987; each of which are incorporated herein by reference. Examples of other closure systems, including mechanical closure systems, useful in the present invention are disclosed in the United States patent.
No. 4,869,724 issued to Scripps on September 26, 1989; U.S. Patent No. 4,848,815 issued to Scripps on July 11, 1989; and the two-point fastening system described in U.S. Patent No. 5,242,436 issued to Weil, Buell, Clear and Falcone on September 7, 1993; each of which are incorporated herein by reference. When a two-point fastening system is used, the waist closure members of the waist closure system are preferably longitudinally aligned with the extensible front waist feature 42 and laterally aligned with the elastic threads of the extendable leg fold 30. to provide an effective closure around both of the legs and waist. As shown throughout the disclosure, the diaper 20 can be provided with a pair of fastening tabs 42 that allow the side panels to be first joined together. The person placing the diaper then brings the containment assembly 22 between the user's legs and attaches the assembly 22 to the outer layer of the waist feature. Such a configuration and assurance method is more fully described in the aforementioned US patent application Serial No. 08 / 044,562 (New et al.). The fastening system may comprise any fastening means known in the art including pressure sensitive adhesives, cohesive materials, mechanical fasteners such as hook-and-loop fasteners, or any combination thereof or any other means of attachment known in the art. technique. Exemplary adhesive tape tab fastening systems are disclosed in U.S. Pat. No.
3,848,594 entitled "Disposable diaper tape fastening system", issued to Buell on November 19, 1974; and in U.S. Patent No. 4,662,875 entitled "Absorbent Article" issued to Hirotsu and Robertson on May 5, 1987. Exemplary fastening systems comprising mechanical fastening components are described in U.S. Pat. No. 5,058,247 titualda "Mechanical clamping tip",
issued to Thomas on October 22, 1991; U.S. Patent No. 4,869,724 entitled "Mechanical fastening system with adhesive tape disposal means for disposal of absorbent articles", issued to Scripps on September 26, 1989; and in U.S. Patent No. 4,846,815 entitled "Disposable diaper having an improved fastening device", issued to Scripps on July 11, 1989. An example of a fastening system having the combination of mechanical fasteners / adhesive is disclosed in U.S. Patent No. 4,946,527 entitled "Pressure sensitive adhesive fastener and method for making same", issued to Battrell on August 7, 1990. Each of these patents is incorporated herein by reference. As discussed, one embodiment of the present invention comprises a hook fastening material preferably comprising a base and a plurality of coupling elements extending from the base. The hook fastening material is intended to couple the fibrous elements of a curl fastening material to provide a secure fastening device. In this way, the hook fastening material can be manufactured from a wide range of materials. In addition, the coupling elements may have any shape such as hooks, "T", or "mushrooms" or any other form as is well known in the art. Suitable materials include nylon, polyester, polypropylene or any combination of these materials. Examples of the preferred hook fastening materials are available from Charlotte, NC, under the trade designation 960, 957 and 942. Other preferred hook fastening materials are available from the Minnesota Mining and Manufacturing Company of ST. Paul, Minnesota, under the commercial designations CS200, CS300, MC5 and MC6. Another preferred hook fastening material is described in U.S. Patent No. 5,058,247 entitled "Mechanical Fastening Tip", issued to Thomas on October 22, 1991, which is incorporated herein by reference.
The second fastening member preferably comprises a fastening element capable of engaging the hook member. In this way, the second clamping member can be manufactured from a wide range of materials and configurations capable of securely engaging the hook member. For example, the second clamping member may comprise identical complementary elements or different complementary elements. As used herein, the term "identical complementary elements" is used to define mechanical fastening systems wherein the coupling elements of the hook member and the second fastening member comprise the same configuration or structure that are locked . Examples of these systems are described in Brown et al., U.S. Patent No. 4,322,875 entitled "Materials of two strips used to form fasteners" issued April 16, 1982 and by Kellenberger and other U.S. Pat. No. 4,701 , 179 entitled "Fixed Position Fasteners for Disposable Absorbent Garments", issued October 20, 1987. The term "distinct complementary elements" is used herein to designate a system where the member's hook is different from the second member. clamping but it is dockable with this one. In a preferred embodiment, the second fastening component comprises a plurality of fiber elements, such as a curl fastening material, which engages the coupling elements of the hook component. The curl fastening material can be manufactured from a wide range of materials to provide fiber elements, preferably being curls. Suitable materials include woven materials, nonwovens, nylon, polyesters, polypropylenes or any combination of these materials. A suitable curl fastening material is a nonwoven material available from the Minnesota Mining and Manufacturing Company, St. Paul, Minnesota under the EBL trade designation. A preferred terry fastening material comprises a number of elements
shaped coupling projecting from a woven backing such as the commercial commercially available material designated Guilford 18904 available from Guilford Mills of Greensboro, NC. Other suitable curl components are available from the Minnesota Mining and Manufacturing Company of St. Paul, Minnesota under the trade designation EBL. A cheap curl fastening material and a method for making the same is disclosed in U.S. Patent No. 5,032,122 entitled "Loop fastening material for fastening device and method for making the same", issued to Noel and others on July 16, 1991, whose application is incorporated herein by reference. Other suitable curl material is described in U.S. Patent No. 5,326,612, entitled "Non-woven female component for restrainable fastening device and method for making the same" issued to David J.K. Goulati on July 5, 1994, which is hereby incorporated by reference herein. Still other suitable secondary fastening components are disclosed in the copending United States patent application No. 08 / 287,571 entitled "Non-woven female component for restrainable fastening device and method for making the same", filed June 6, 1994. on behalf of Willie F. King and others; Y
U.S. Patent Application Serial No. 08 / 374,269 entitled "Non-woven female component for restrainable fastening component"; presented on August 9, 1994 in the name of Karl L. Bergman et al. The fastening elements can be arranged on either the outer surface 52 or the inner surface 50 of the diaper 20. However, in a preferred embodiment, the fastening elements are arranged on the diaper 20 in such a way that the fasteners do not irritate the user's skin In addition, the fastening elements may either be a separate discrete element affixed to the diaper 20 or a piece of unitary material that is not divided or discontinuous with a diaper member 20, such as the topsheet 24 or the backsheet 26. Although fasteners can assume sizes and shapes
variables, these preferably comprise one or more separate material patches, attached to the diaper 20, attached to the diaper 20 attached to allow for the best fit to a wider range of user. The topsheet 24 is positioned adjacent to the body surface of the absorbent core 28 and is preferably attached thereto and to the backsheet 26 by means of attachment
(not shown), such as those well known in the art. Suitable fixing means were described with respect to the attachment of the backsheet 26 to the absorbent core 28. As used herein, the term "attached" encompasses configurations by means of which a first element is directly secured to a second element. by fixing the first element directly to the second element and configurations by which the first element is indirectly secured to the second element by fixing the first element to a member or intermediate members which in turn are fixed to the second element. In a preferred embodiment of the present invention, the topsheet 24 and the backsheet 26 are directly bonded together at the periphery of the diaper, and are indirectly joined together by attaching them directly to the absorbent core 28 by the attachment means (not shown). The topsheet 24 is docile, soft in feel, and non-irritating to the wearer's skin. In addition, the topsheet 24 is permeable to liquid, allowing liquids, for example (menstruation and / or urine), to easily penetrate through its thickness. A suitable top sheet 24 can be manufactured from a wide range of materials such as woven and nonwoven materials, polymeric materials such as thermoplastic films formed with apertures, plastic films and hydroformed thermoplastic films; porous foams; cross-linked foams, cross-linked thermoplastic films, and thermoplastic films. Suitable woven and nonwoven materials may be composed of natural fibers (eg, wood or cotton fibers) of synthetic fibers (e.g. polymer fibers such as polyester, polypropylene or polyethylene fibers), or
from a combination of natural and synthetic fibers. There are a number of manufacturing techniques that can be used to make the top sheet 24. For example, the top sheet 24 can be a non-woven web of fibers. When the top sheet comprises a non-woven web, the web may be spun bonded, carded, wet-blown, hydroentangled, combinations of the above, or the like. A preferred top sheet is carded and thermally bonded by means well known to those skilled in the art of fabrics. A preferred top sheet comprises short length polypropylene fibers having a denier of about 2.2: As used herein the term "short length fibers" refers to those fibers having a length of at least about 15.9 mm. . Preferably, the topsheet has a basis weight of about 18 to about 25 grams per square meter. A suitable top sheet is manufactured by Veratec, Inc., a Division of International Paper Company, of Walpole, Massachusetts under the designation P-8. The backsheet 26 is positioned adjacent the garment surface of the absorbent core 28 and is preferably attached thereto by attachment means (not shown), such as those well known in the art. For example, the backsheet can be secured to the absorbent core 28 by a continuous uniform adhesive layer, a patterned adhesive layer, or an array of separate lines, axes, spirals or spots of adhesive. The adhesives that have been found to be satisfactory are manufactured by H.B. Fuller
Company of St. Paul, Minnesota, and is marketed as HL-1258. The attachment means preferably will comprise an open-pattern network of adhesive filaments as disclosed in U.S. Patent No. 4,573,986 entitled "disposable garbage containment garment", which was issued to Minetola and Trucker on March 4, 1985, and which is incorporated herein by reference. An exemplary joining means of a pattern network
The filament open comprises several lines of adhesive filaments twisted in a spiral pattern as illustrated by the apparatus and methods shown in United States Patent No. 3,911,173 issued to Sprague on October 7, 19875; U.S. Patent No. 4,785,996 issued to Ziecker et al. on November 22, 1978; and U.S. Patent No. 4,842,666 issued to Werenicz on June 27, 1989.
Each of these patents are incorporated herein by reference. Alternatively, the joining means may comprise heat bonds, pressure joints, heat / pressure joints, ultrasonic joints, mechanical dynamic joints or any other suitable joining means or combinations of these joining means as are known in the art. art. The backsheet 26 is impervious to liquids (eg, urine), and is preferably manufactured from a thin plastic film, although other flexible liquid impervious materials may also be used. As used herein, the term "flexible" refers to materials that are docile and that will easily conform to the contour and general shape of the human body. The backsheet 26 prevents the exudates absorbed and contained within the absorbent core 28 from wetting the articles that are in contact with the diaper 20, such as sheets and undergarments. The backsheet 26 may thus comprise a woven or non-woven material, polymeric films such as polyethylene or polypropylene thermoplastic films, or composite materials such as a film-coated nonwoven material. Preferably, the backsheet is a thermoplastic film having a thickness of about 0.012 mm to about 0.051 mm. The backsheet preferably comprises a polyethylene blend film of approximately 0.025 mm as manufactured by Tredegar Corporation of Terre Haute, In and marketed as P8863. The absorbent core 28 may be any absorbent means that is capable of absorbing and retaining liquids such as urine and certain other exudates from the body. The nucleus
absorbent 28 has a garment surface, a body surface, side edges and waist edges. The absorbent core 28 can be manufactured in a wide variety of sizes and shapes (eg, rectangular, hourglass, T-shaped, asymmetric, etc.), and from a wide range of liquid absorbent materials commonly used in disposable diapers and other absorbent articles, such as crushed wood pulp which is generally referred to as an air filter. Examples of other suitable absorbent materials include accreted cellulose wadding, meltblown polymers, including coform, crosslinked cellulose fibers, tissue, including tissue wraps and. laminates of tissue; absorbent foams, absorbent sponges, superabsorbent polymers, gelling absorbent materials or any equivalent material or combinations of materials. The configuration and construction of the absorbent core can also be varied (e.g., the absorbent core may have zones of varying gauge), a hydrophilic gradient, a superabsorbent gradient or acquisition zones with lower average density and lower average basis weight; or may comprise one or more layers or structures). However, the total absorbent capacity of the absorbent core 28 must be compatible with the design load and intended use of the diaper 20. In addition, the size and absorbent capacity of the absorbent core 28 can be varied to encompass users ranging from babies to adults. Figure 1 shows a preferred embodiment of the diaper 20 having an absorbent core with a rectangular shape. A useful absorbent structure such as the absorbent core 28 of the present invention which has achieved wide acceptance and commercial success is described in U.S. Patent No. 4,610,678 entitled "High Density Absorbing Structures", issued to Weisman and Goldman on 9 September 1986, U.S. Patent No. 4,673,402 entitled "Absorbent articles with cores in double layers", issued to Weisman, Houghton and Gellert on June 16, 1987; United States Patent No.
4,888,231 entitled "Absorbent Core Having a Dust Cap", issued to Weisman, Houghton and Gellert on June 16, 1987; U.S. Patent No. 4,888,231 entitled "High efficiency absorbent articles for the management of incontinence", issued to Young, La Von and Taylor on September 15, 1992; U.S. Patent No. 5,102,597 entitled "Absorbent, porous polymeric structures and methods for making them", issued to Roe, Lahrman and Berg on April 7, 1992; and U.S. Patent No. 4,834,735 entitled "High density absorbent members having acquisition zones with lower density and lower basis weight", issued to Berg on May 30, 1989; it also describes absorbent structures that are useful in the present invention. "Absorbent core 28 is preferably the double layer absorbent structure described in U.S. Patent No. 5,234,423 entitled" Absorbent article with elastic waist feature and increased absorbency ", issued to Alemany and Clear on August 10, 1993. Each of these patents is incorporated herein by reference In a preferred embodiment of the present invention, an acquisition layer or layers may be placed between the topsheet 24 and the core. absorbent 28 and are bonded to the absorbent core 28. The acquisition layer can serve several functions, including the capillary action of the improved exudates on and towards the absorbent core.There are several reasons why the improved capillary action of the exudates is important , including providing a more even distribution of the exudates throughout the absorbent core 28 and allowing to make the absorbent structure relatively thin. The capillary action referred to herein may encompass liquid transport, in one, two, or in all directions (i.e., in the x-y plane and / or z-direction). the acquisition layer may be composed of several different materials including non-woven or woven webs of synthetic fibers, including polyester polypropylene or polyethylene; of fibers
natural products including cotton or cellulose, mixtures of these fibers or any equivalent materials or combinations of materials. Examples of the absorbent structures disclosed herein having an acquisition layer and a topsheet are more fully described in U.S. Patent No. 4,950, k265 issued to Osborn, Ill and in U.S. Patent Application No. of Series 07 / 944,764,
"Absorbent article having fused layers", presented on October 7, 1992 in the name of Cree and others. Each of these references are incorporated herein by reference. In a preferred embodiment, the acquisition layer may be bonded to the topsheet 24 and separated from the inserted absorbent material or absorbent core 28 by any conventional means for joining together, most preferably by fusion joints as described more fully in FIG. the Cree request referred to above. The diaper 20 preferably further comprises extendable leg cuffs 30 to provide improved containment of liquids and other body exudates. Each extendable leg fold 30 may comprise several different embodiments to reduce leakage of body exudates in the leg regions, (the leg fold may be and is sometimes also referred to as leg bands, leg flaps, barrier folds). , or elastic folds). U.S. Patent No. 3,860,003 entitled "Shrinkable side portions for a disposable diaper", issued to Buell on January 14, 1975, discloses a disposable diaper that provides a collapsible leg opening that has a leg flap and a flap. more elastic members to provide an elasticized leg fold (packing fold). U.S. Patent No. 4,909,803 entitled "Disposable Absorbent Article Having Elasticized Fins", issued to Aziz and Blaney on March 20, 1990, discloses a disposable diaper having "upright" elasticated fins (barrier folds), to improve the containment of the leg regions. U.S. Patent No. 4,695,278
entitled "Absorbent article having double folds" issued to Lawson on September 22, 1987, describes a disposable diaper that has double folds that include a fold of gasket and a fold of barrier. U.S. Patent No. 4,704,115 entitled "Disposable Waste Containment Garment", issued Buell on November 3, 1987, discloses a disposable diaper or incontinence garment having sidewall leakage protection channels configured to contain the free liquids inside the garment. U.S. Patent No. 5,032,120 entitled "Disposable Absorbent Article Having Improved Leg Folds", issued to Freeland and Allen on July 16, 1991, discloses an absorbent article having leg folds that have a final contact force relatively low at relatively high elongations achieved, for example, by the low contact force differential material. U.S. Patent No. 5,087,255 entitled "Absorbent article having bent barrier folds", issued to Sims on February 11, 1992, discloses an absorbent article having bent barrier folds with the distant edge placed outwardly from the shore proximal in one waist region and inward in the other, to provide the best fit around the hip / buttock. Each of these patents are incorporated herein by reference. The diaper 20 further comprises extendable waist features that provide improved fit and containment. The extensible waist features at least extend longitudinally outward of the containment assembly 22, preferably from a respective waist edge of the absorbent core 28 and generally form at least a portion of the end edge of the diaper 20. Although a disposable diaper of the present invention invention is constructed with an extendable waist feature disposed in each waist region (a characteristic of elastic waist 32), the discussion will focus on diapers having different configurations for each feature of
Extendable waist Even a minimum is preferred that the diaper have at least one of the extensible waist features constructed in accordance with the present invention, more preferably at least the elastic waist feature 32. The waist features can be constructed as a separate element attached to the waist. containment assembly 22 or as an extension of other diaper elements (i.e., unitary). The waist characteristics will be described with respect to the preferred embodiments in which certain parts or panels comprise an extension of other diaper elements, such as the backsheet 26, the top sheet 24, or both, and other parts or panels comprise a separate element attached to other parts or panels of the waist feature or other diaper panels. As used herein the term "cyclodextrin" includes any of the known cyclodextrins such as unsubstituted cyclodextrins containing from 6 to 12 glucose units, especially, alpha-beta- and gamma-cyclodextrins and / or their derivatives and / or mixtures thereof. Alpha-cyclodextrin consists of 6, the beta-cyclodextrin of 7 and the gamma-cyclodextrin of 8 glucose units arranged in a donut-shaped ring.
The specific coupling and conformation of the glucose units give the cyclodextrin a conical, rigid molecular structure with a hollow interior of a specific volume. The "coating" of the internal cavity is formed by hydrogen atoms and oxygen atoms bridged with glycoside, therefore this surface is almost hydrophobic. These cavities can be filled with all or a part of an organic molecule of adequate size to form an "inclusion complex". Alpha-beta, - and gamma-cyclodextrins can be obtained from, among others, American Maize Products Company (Amaizo), Hammond, Indian. Cyclodextrin derivatives are described in U.S. Patent Nos. 3,426,011, Parmerter et al., Issued February 4, 1969; 3,453,257,
3,453,258, 3,453,259 and 3,453,260 all in the name of Parmerter and others, and also all issued on July 1, 1969; 3,459,731, Gramera et al. Issued August 5, 1969; 3,553,191, Parmerter et al., Issued January 5, 1971; 3,565,887, Parmerter et al., Issued February 23, 1971; 4,535,152, Szejtli, and others on August 13, 1985; 4,616,008, Hirai et al., Issued October 7, 1985; 4,638,058, Brandt et al. Issued January 20, 1987; 4,746,734, Tsuchiyama et al., Issued May 24, 1988; and U.S. Patent No. 4,678,598 Ogino et al. issued July 7, 1987; all of the above-referenced patents are hereby incorporated by reference. Examples of the cyclodexyrin derivatives suitable for use herein are methyla-beta-cyclodextrin, hydroxy-ethyl-beta-cyclodextrin and hydroxypropyl-beta-cyclodextrin of different degree of substitution (D.S.), available from Amaizo; Wacker Chemicals (E.U.A.) Ine; and of Aldrich Chemcial Company. Water-soluble derivatives are also highly desirable. The compositions and articles of this invention optionally contain, in addition, of the non-complex cyclodextrins, of reduced particle size, an effective amount (ie, odor controller, of several additional odor control auxiliary materials). The incorporation of auxiliary odor control materials will increase the cyclodextrin's ability to control odors, as well as the range of odor types that are controlled. These materials include, for example, zeolites, activated carbon, kieselguhr, and water-soluble antibacterial compounds, such as cetyl pyridinium chloride, zinc chloride, copper salts, copper ions, chlor-exidine, quaternary ammonium compounds, chelating agents. , parabens, chitin, pH regulating materials, and the like. Especially preferable is the zeolite material having intermediate proportions of silicate / aluminate. A wide variety of intermediate zeolites suitable for use here,
are commercially available as VALFOR CP301-68, VALFOR 300-63, VALFOR CP300-35 and VLAFOR eP300-56 from PQ Corporation and the CBV100 series (other than Mordenite, as indicated below) from Conteka zeolites. In the event that the zeolites herein are optionally to be used in combination with the activated carbon, it is preferred for visually aesthetic purposes), to coat the carbon with the zeolite using a binder. Another odor control agent includes kieselguhr, and the water soluble antibacterial compounds, such as cetyl pyridinium chloride, zinc chloride, copper salts, copper ions, chlorexidine, quaternary ammonium compounds, chelating agents, parabens, chitin, pH regulating materials and the like. The ingredients and compositions of the encapsulated agents, i.e., perfumes, of this invention are those conventional known in the art. The selection of any component of the encapsulated agents or the amount of the encapsulated agents is based on functional and aesthetic considerations. The components of the preferred encapsulated agents useful in the present invention are the ingredients
• of the highly volatile and moderately volatile encapsulated agents, more preferably the highly volatile low boiling ingredients. The ingredients of the highly volatile low boiling encapsulated agents typically have boiling points of about 250 ° C or less. These ingredients of the highly volatile encapsulated agents are fleeting and are quickly lost as they are released. Many of the ingredients of the more moderately volatile encapsulated agents also get lost quickly. The ingredients of the moderately volatile encapsulated agents are those having boiling points of from about 200 ° C to about 300 ° C. Many of the ingredients of the encapsulated agents as described hereinafter,
together with their odor characteristics, and their physical and chemical properties such as boiling point and molecular weight, are given in "encapsulated agents and flavoring chemicals" (aroma chemicals) "Steffen Arctander published by the author, 1969, incorporated Here by reference Examples of the ingredients of the highly volatile low boiling encapsulated agents are: anetola, benzaldehyde, benzyl acetate, benzyl alcohol, benzyl formate, isobornyl acetate, camfeno, cis-cistral (neral), citronellal, citronellol , citronellyl acetate, para-cymene, decanal, dihydrolinalol, dihydromyrencenol, dimethyl phenyl carbinol, eucalyptol, geranial, geraniol, geranyl acetate, geranyl nitrile, cis-3-hexenyl acetate, hydroxycitronellal, d-limonene, linalool, oxide of linalool, ninallyl acetate, linalyl propionate, methyl anthranilate, alpha-methyl ionone, methyl nonyl acetaldehyde, methyl phenyl carbinyl acetate, laevo-methyl acetate or, menthone, isomenthone, mircerne, mycorrhilium acetate, mircenol, nerol, neryl acetate, nonyl acetate, phenyl ethyl alcohol, alpha-pinene, beta-pinene, gamma-terpinene, alpha-terpinol, beta-terpinol, acetate of terpinyl, and vertenex (para-tert-butyl acetate, cycloex). Some natural oils also contain large percentages of highly volatile encapsulated agent ingredients. For example, bleach contains as main components: linalool; linalyl acetate, geraniol; and citronellol: Lemon oil and orange terpenes both contain approximately 95% d-limonene. Examples of the ingredients of moderately volatile encapsulated agents are: amyl cyamic aldehyde, iso-amyl salicylate, beta-caryophyllene, cedrene, cinnamic alcohol, coumarin, dimethyl benzyl carbinyl acetate, ethyl vanillin, eugenol, isoeugenol, flower acetate, heliotropin, 3-cis-hexenyl salicylate, hexyl salicylate, lilial (para-terbutyl-alpha-methyl-hydrocinnamic aldehyde), gamma-methyl ionone, nerolidol, pachulli alcohol, phenyl hexanol, beta-selinose, trichloromethyl acetate phenyl carbinyl, triethyl citrate,
vnillin and veratraldehyde. The cedar wood terpenes are mainly composed of alpha-cedrene, beta-cedrene, and other sesquiterpenes of C15 H24. The cyclodextrin inclusion / encapsulated agent complexes of the present invention are formed in any manner known in the art. Typically, the complexes are formed, either by bridging the encapsulated agents and the cyclodextrin together in a suitable solvent, for example, water or, preferably, by kneading, suspending the ingredients together in the presence of a suitable, preferably minimum, amount of solvent. preferably water. The kneading / suspension method is particularly desirable, because it results in smaller particles in such a way that there is less, or no, need to reduce the particle size. In addition, less solvent is needed and therefore less separation of the solvent is required. Disclosures of complex formation can be found in Atwood, J.L., J.ED. Davies & D.D. MacNichol, (Ed.): Inclusion Compounds-, Vol lll Academic Press (1984), especially Chapter II Atwood, J.L and J.E.D. Davies (ED.): Proceedings of the Second International Svmposium of Cvclodextirns Tokyo, Japan, (July 1984), and J. Szejtli, Cyclodextrin Technology,
Kluwer Academic Publishers (1988). The publications are hereby incorporated by reference. The microcapsules for use in this invention can be made by many of several well-known encapsulation processes. Examples of the appropriate processes include chemical encapsulation processes and mechanical encapsulation processes. A wide variety of processes exist by means of which the microcapsules of the present can be manufactured. These varied processes provide different techniques for producing microcapsules of varying sizes, alternate materials for the composition of the capsule shell and various different functional materials within the shell. Some of these various processes are shown in the patents of the
United States No. 3,516, k846 ,; 3,516,941; 3,996,156; 4,409,156 and 5,180,637 and in the British patent disclosures Nos. 1,156,725, 2,041,319 and 2,048,206 and each is incorporated herein by reference. It is also desirable to have construction of the microcapsule that will resist the effects of varying environmental conditions, therefore, it is desirable that the breaking strength exceed 4.0 g / cm after storing 120 ° C and less than 1% relative humidity for 72 hours. This test would be performed by storing in an oven, stirring an environment (eg, a sealed bag or jar) until the item is at room temperature and then measuring the breaking strength. It is preferred that the breaking strength be at least 8.0 g / cm and it is highly preferred that the breaking strength be at least 16 g / cm under these conditions. The article must still exhibit a breaking strength of between 2 and 90 g / cm at 20 ° C and 50% relative humidity. The use of microcapsules 70 that are not sensitive to moisture in combination with these large microcapsules 70 (ie greater than 30 microns and up to 50 microns), provides an adhesive layer containing useful microcapsules. An example of a mechanical encapsulation process is the collision of the droplets of the material to be encapsulated (i.e. in the case of this invention, the encapsulated agents or other deodorant compositions) within the liquid or semi-solid films of the wall material. of the capsule tried; the separation of the drop encapsulated in this way from the shock film and the solidification of the material of the wall of the microcapsule. Chemical encapsulation processes generally include combining a first reactive material in a capsule manufacturing vehicle of the continuous phase and a second reagent material in drops to be encapsulated. The drops are then dispersed in the manufacturing vehicle and a reaction is carried out between the materials
reagents The separation of the liquid-liquid phase of the polymeric material from the wall of the vehicle capsule is carried out where the separated phase polymeric material moistens and envelops the dispersed droplets to be encapsulated. A wide variety of different materials can also be used when making capsule covers. A popular material for the formation of the cover is the reaction product by polymerization between urea and formaldehyde or melamine and formaldehyde, or the products of polycondensation of monomeric or low molecular weight polymers of dimethylol urea or methylolated urea with aldehydes. A variety of capsule forming materials are disclosed, for example, in U.S. Patent Nos. 3,516,846 and 4,087,376, and in the description of the British patents Nos.
2,006,709 and 2,062,570 and each is incorporated herein by reference. It has also been found that the size of the microcapsule plays a role in the utility of the microcapsules of the present, in accordance with the practice of the present invention. Generally, the microcapsules should have an average diameter of between 5 and 100 microns and preferably between 12 and 30 microns when the payload of the capsule is of
80 and 90% by weight of the total weight of the capsule. It is highly preferred that the microcapsules have an average diameter between 14 and 42 microns and it is more preferred that the microcapsules have a diameter between 15 and 25 microns. These dimensions play a surprisingly important role in the ability to control the rupture rate of the microcapsules in the practice of the present invention. With smaller payloads, (for example 70 to 80%), the microcapsules must be larger to provide the necessary breaking strength. The widest range of the average capsule size under most conditions would be about 5 to 100 microns. When 8 micron microcapsules are used, a payload of 90 to 95% by weight is preferred. Generally preferred are microcapsules that are between 8 and 30 microns in size.
The microcapsules here can form between 20 and 99% by volume of the total composition of the zone agglutinator with perfume 85, but most preferably between
and 75% of this total volume of the composition. The absolute separation force tends to be dependent on the weight of the base coating and relatively independent of the quantity of the microcapsules (up to 50% by weight of microcapsules 70 per unit area). It is preferred that the microcapsules have an average diameter of between 5 and 100 microns, the cohesion strength of the layer of the adhesive composition being less than the strength of the bond between the binder and the coated surface of the perfume zone 85, the resistance to tensile rupture of the microcapsules being less than the cohesion strength of the binder and the breaking strength of the binder containing the microcapsules at 50% relative humidity being between at least 0.5 ounces per 5/2 linear inches (greater that 1.0 grams per centimeter and less than 20 grams per centimeter). It is preferred that the breaking strength of the microcapsules exerted by a pull strip 80 exceeds 2.0 grams per centimeter and is less than 16 grams per centimeter and most preferably exceeds 2.5 grams per centimeter and is less than 10 grams per centimeter. In the most preferable embodiments, the nature and composition of the binder is not critical to the practice of the invention as long as the binder is capable of attaching the microcapsules 70 to the outer surface 52 of the backsheet or backing member 88. It should be noted that a suitable agglutinator for the practice of the invention will not stick to or otherwise stain the laundry when the perfume area 85 has been discovered and is subsequently placed in close proximity to the garment. The amount of adhesive must be sufficient to retain the microcapsules in the place of the aforementioned surfaces, until the microcapsules rupture by the removal of the user's diaper 20. Any kind of adhesives, including, but not limited to
a, polyurethane resins, polyacrylates, polyvinyls (eg, polyvinyl alcohol, polyvinyl chloride), polyamides, polyesters, polyolefins, starches, gum arabic, gelatin and the like, can be easily used in the practice of the present invention. Preferably, the binder 82 used to secure the release agents 65 contained therein to the surface of the perfume zone 85 and the pull strip 80 is an acrylate or methacrylate-based adhesive system comprising microspheres of non-meltable elastomeric copolymer, solvent dispersible, solvent-soluble, inherently sticky, as disclosed in U.S. Patent No. 3,691,140. Alternatively, this adhesive composition may comprise microspheres of elastomeric pressure sensitive adhesive, solvent dispersible, solvent insoluble, inherently tacky, infusible, acrylate, polymer, hollow, as disclosed in U.S. Patent No. 5,045,569 . Washing the microcapsules 70 before mixing them with the adhesive often tends to provide greater consistency in their properties by removing unreacted, low molecular weight materials. In another aspect, the present invention involves a novel article comprising a thermoplastic substrate, preferably flexible, which is partially embedded therein microcapsules capable of breaking. In this mode, the agglutinating resin is required. This article can be used in situations where good protection of the microcapsules is desired, but where access to the microcapsules must be retained. The methods to apply the binder (with microcapsules to the substrate, can vary, depending on the available methods and the economic ones more than any other parameter.) The suitable methods of application include the methods of air cutting, gravure coating, and stamping including silky, gravure and flexographic stencil techniques The agglutinator (with the microcapsules) can be applied either in a continuous or discontinuous pattern on the external surface of the sheet
later or the backup member. Capsule wall materials suitable for use with the teachings of the present invention include any suitable polymer film former. For example, the microcapsules can be made from natural hydrophilic polymeric materials such as gelatin, gum arabic, carrageenan starch and ceina; natural polymeric materials modified in some way such as ethyl cellulose, carboxy methyl cellulose, shellac, resin and nitrocellulose; and other polymeric materials such as polyvinyl alcohol, polyethylene, polystyrene, polyacrylamide, polyester, polybutadiene, silicone, epoxy, and polyurethane. The encapsulated or particular agents or encapsulated deodorants do not form part of the present invention and can be varied to such a degree as to challenge classification or disappointment. Reference is made, instead, to "cosmetics, science and technology", second edition, edited by M.S. Balsam and Edeard Sagarin and published by John Wiley & Sons, New York, 1972. In particular, reference is made to chapter 32, "Fragrance" written by M.S. Balsam for examples of the variety of possible encapsulated agent formulations. The material contained in the microcapsules can be any of a variety of liquids, including solutions, dispersions, and gelled materials. Preferred types of ingredients are organic solids which are fragrance releasing materials that easily volatilize upon breaking of the microcapsules. The most preferred types of ingredients would be aromatic materials (such as essences), and most preferably highly volatile perfumes), or materials that provide vapors or chemically active liquids (eg, bacteriostats or deodorants). Whatever the fragrance, these or these must be selected to be compatible with the area with fragrance 85, the binder 82 and the pull strip 80 and all the others
diaper components. Although 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. Therefore, attempts are made in the appended claims to protect all these changes and modifications that are within the scope of the present invention.
Claims (5)
1. An absorbent article having a first surface and a second surface positioned opposite the first surface, characterized in that: said second surface comprises at least one area with perfume located thereon, said zone with perfume comprising a pull strip and a agglutinator securing the pull strip to the second surface, said binder comprising release agents dispersed therein, said release agents preferably being microcapsules.
2. An absorbent article having a fluid pervious top sheet, a fluid impermeable back sheet that is bonded to the top sheet, the back sheet having an inner surface and an outer surface, and an absorbent core located between the top sheet and the backsheet, characterized in that: the outer surface of the backsheet comprises at least one area with perfume located thereon, said zone with perfume comprising a pull strip and a binder ensuring the outer surface strip of the backsheet , the agglutinator comprising release agents dispersed there, the release agents being preferably microcapsules.
3. An absorbent article having a fluid pervious top sheet, a fluid impermeable back sheet having an inner surface and an outer surface joined to the top sheet and an absorbent core located between the top sheet and the back sheet, characterized in that: the outer surface of the backsheet comprises at least one area with perfume located thereon, said zone with perfume comprising a backing member having a first surface and a second surface, said first surface of the backing member being attached to the outer surface of the backsheet, a binder comprising dispersed release agents there which is attached to the second surface of the backing member and a pull strip which is attached to and covers the binder, being the release agents preferably microcapsules. The absorbent article according to claim 1, 2 or 3, wherein the release agents comprise at least one perfume selected from the group consisting of non-complex cyclodextrins, perfumes, zeolites, activated carbons and mixtures thereof. The absorbent article according to any of the preceding claims, wherein a number of the release agents diffuse in a diffused manner at the time of detachment of the pull strip from the perfume zone, said release agents provide a discharge of fragrance by detaching the pull strip member from the area with perfume, or both.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US08764817 | 1996-12-12 |
Publications (1)
Publication Number | Publication Date |
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MXPA99005476A true MXPA99005476A (en) | 2000-01-21 |
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