JP2002520090A - Disposable pants with asymmetric absorbent core - Google Patents

Abstract

(57) Abstract: Three-dimensional disposable pants with an absorbent core are asymmetrical forward with a factor not exceeding 0.155. The absorbent core is located in a front area, a central area, and a rear area of the disposable pants, and an absorbent core in a rear area of the disposable pants divided by a length of the absorbent core in the front area and the central area of the disposable pants. Is less than 0.155, and the length of the absorbent core in the front section of the disposable pants is greater than the length of the absorbent core in the rear section of the disposable pants. The disposable pants have elasticized leg openings and waist openings to allow the pants to extend around the user's buttocks and abdomen.

Description

DETAILED DESCRIPTION OF THE INVENTION

TECHNICAL FIELD [0001] The present invention relates generally to pants, and more particularly, to a liquid impermeable area and absorption moved forward to effectively hold and absorb excrement and waste. The present invention relates to disposable incontinence pants having a sex core.

BACKGROUND ART Currently, various types of clothing or a combination of an absorbent article and clothing are used as pants-type clothing. Examples of such garments include regular (non-disposable) pants, regular pants used in combination with various incontinence or absorbent articles, and disposable absorbent underwear, A basic structure having an aqueous liquid permeable topsheet layer and an absorbent core including one or more layers for receiving and absorbing excrement and a liquid barrier impermeable to aqueous liquid for retaining excrement It has.

[0003] As is well known, disposable underwear garments are now widely used for adult incontinence care as well as infant care. (However, there is a difference between young children and adults, as well as the amount of activity and movement, so simply increasing the size of disposable training pants and making them adult-sized would not be enough for adult users. Many disposable underwear garments include a liquid-permeable bodyside inner liner (topsheet layer), a liquid-impermeable outer cover (liquid barrier), and a liner. 3 is a three-layer composite structure with an absorbent core sandwiched between the cover and the cover. The absorbent core is typically symmetrically disposed between the front waist band and the back waist band. Currently, materials commonly used as the three main components in disposable pant underwear include various types of nonwovens for the bodyside liner (topsheet layer), thin thermoplastic films for the outer cover (liquid barrier), and even more. There are cellulose fluffs for absorbent cores.

[0004] Some of these garments function to meet their intended purpose, but have improved absorption properties, improved utilization of absorbent materials, and even wear. There is still a need to provide more freely usable underwear garments with improved waste retention characteristics that minimize discomfort to the wearer. More specifically, in the past, underwear garments have not been designed to facilitate the transfer of aqueous liquid to the entire area, including the absorbent layer, or the end of the absorbent core layer. As a result, most of the absorption capacity of the pants-type garment is not sufficiently utilized because the absorption of the waste is concentrated in the narrow area of the absorbent core.

[0005] Many products, such as pant garments and other absorbent personal care garments, are typically worn in a "J" form. The front region of the pants-type garment is worn on the wearer's body at a position lower than the rear region of the pants-type garment. Thus, the center of the pant-type garment typically does not coincide with the point of excretion. That is, the excretion point exists in the front area direction of the pants-type garment. In this pants-type garment, it can be said that the absorbent material is not properly installed at the excretion point. Furthermore, in pants-type garments having an absorbent core provided with a trapping region in the center, the expected absorbency cannot be obtained, resulting in an incomplete product.

Heretofore, some pants-type garments for absorbing and retaining human excrement are typically bulky and somewhat inefficient. Typically, the absorbent core is provided at a location where most of the absorption capacity is not fully utilized, and especially the central and rear regions are formed in a bulky shape. Of course, this style of pants-type garment is not comfortable to wear, especially when the wearer is active. In addition, this type of pants-type garment is expensive and inefficient because the absorbent material is located in the rear area that is unused and wasted.

[0007] Thus, it is clear that there is a need for an absorbent pants-type garment with improved absorption and retention characteristics of the pants-type garment while maintaining comfortable wearability.

SUMMARY OF THE INVENTION In summary, the present invention typically comprises a resilient leg opening and a waist that is circumferentially extensible around the buttocks and abdomen area. Provide three-dimensional disposable free-use pants that provide incontinence protection. The benefit of protection is gained by providing a flexible absorbent core in the crotch area of the pants, which is maintained in a proper position against incontinence by an elastic system surrounding each leg opening. Can be The absorbent core extends from the crotch region of the pants to the inside of the pants body at the front body portion and the rear body portion. This provides pants that can capture and absorb incontinence excrement and prevent liquid from permeating into the jacket or bed sheets.

[0009] The present invention provides improved disposable pants with improved absorption, retention and comfort properties. In the disposable pants of the present invention, the absorbent core is disposed mainly in the front area and the central area, and the absorbent core is not disposed symmetrically when viewed from the longitudinal dimension of the disposable pants, so that the absorbent core is substantially flat. It is possible to form a more appropriate and comfortable pants shape when the anatomical state is changed from the state described above.

Furthermore, the ratio (asymmetry factor) of the length of the absorbent core in the rear area of the disposable pants divided by the total length of the absorbent core in the central area and the front area is about 0.27.
Must be less than 0. The disposable pants also have a resilient design that facilitates the formation of a bag structure in the central area and effectively promotes a seal between the disposable pants and the wearer, so that the disposable pants can be worn comfortably. It becomes a pant and its holding properties are also improved.

Also, in a preferred embodiment of the present invention, by providing a continuous and constant ratio of fibers and superabsorbers in the CD and MD directions throughout the dimensions of the absorbent core, in the x, y, z directions An absorbent core is provided that facilitates rapid aqueous liquid transfer. However, the density or area of the fibers or superabsorbent of the absorbent core can be varied in the CD and MD directions throughout the dimensions of the absorbent core.

In addition, the absorbent pant has a surge layer (capture material) between the topsheet layer and the absorbent core, or the absorbent core and the liquid barrier, in order to retain a large volume of the jetted aqueous liquid. A gauze may be further provided between them. In some embodiments, a disposable pant can include both gauze and a surge layer (entrapment material). Ideally, the gauze and surge layers (entrapment material) should be arranged asymmetrically in the front and center areas of the disposable pants, and need not be in the rear area. Other objects of the present invention will be described below.

Definitions “Aqueous liquid impervious” means that under normal conditions of use, the aqueous liquid, such as urine, is brought into contact with the layer or laminate approximately at the point of contact with the layer or laminate. Indicates a layer or laminating means that does not pass in the vertical direction. The "rear, posterior, or posterior" based on the human anatomy is defined by reference to FIGS. 1-3, which show the front half and the rear half through the center of the underwear shown. The horizontal axis or the horizontal plane is divided into two. "Rear" or "rear side" or "rear" of the wearer includes a portion from the center line of one side of the wearer to the center line of the other side of the wearer around the back. The “rear region” is a rear portion of the garment that is worn on the back side of the wearer's body and corresponds to １ ／ of the entire length of the garment.

“Barrier fabric or barrier” refers to a fabric that is relatively impermeable to the permeation of aqueous liquids, ie, A
A fabric having a blood penetration rate of 1.0 or less according to STM (American Society for Testing and Materials) test method 22. Alternatively, "barrier fabric" refers to a fabric that has a useful level of permeation resistance to aqueous liquids and / or particles. Generally, the permeation resistance of an aqueous liquid is measured by a water column pressure test, a spot penetration test, a water spray permeation test, or the like. Unless otherwise specified, materials resistant to permeation of aqueous liquids have a water column pressure of at least 20 as measured by the standard hydraulic test AATCC (American Association of Textile Chemists and Color Engineers) TM 127-1977. A material that is centimeters. For example, such an aqueous liquid resistant material may have a water column pressure of 60 centimeters or more. The particle permeation resistance can be measured by determining the retention of the dried particles in the air filter, and can be expressed by the particle resistance efficiency. In particular, particle resistance efficiency refers to the efficiency of a material in preventing particles in a particular range of size from passing through the material. Particle resistance efficiencies are described, for example, in IBR Test Method E-217, G Revised by InterBasic Resources, Grass Lake, Michigan (Jan. 15, 1991).
It can be measured by determining the air filter retention in a test using dry particles as in (d). Generally, it is desirable for the barrier fabric to have high particle retention efficiency. Desirably, the barrier fabric should be resistant to permeation by a tap of at least about 20 cm and / or have a particle retention efficiency of at least about 40% for particles larger than about 0.1 microns. .

“Blend” refers to a mixture of two or more polymers, while “alloy” refers to a subclass of blends in which the components are immiscible but compatible. I do. "Mixed" and "immiscible" are defined as a blend of negative and positive values for the free energy of mixing, respectively. Further, "compatibilizing" is defined as a method of modifying the interfacial properties of an immiscible polymer blend to form an alloy.

“Coupling” refers to joining, bonding, connecting, attaching, or the like, two components. 2
Two components are considered to be connected if they are directly connected to each other or if they are indirectly connected to each other, such as if each is directly connected to an intermediate component.

A “bonded carded web” is a short fiber fed through a combing device or a carding device that divides and arranges short fibers in a machine direction to form a fiber nonwoven web oriented substantially in the machine direction. Refers to webs made with Typically, such fibers are purchased in a package placed in a picker that separates the fibers before entering the carding equipment. Once the web has been formed, it can be combined with one of the known bonding methods.
Combined in one or more ways. One such bonding method is powder bonding, in which the powder adhesive is distributed throughout the web and then the web and the adhesive are activated, usually by heating with hot air. Another suitable bonding method is pattern bonding, in which the web can be bonded to the entire surface, if necessary, using a heated calendar roll or an ultrasonic bonding device, but is usually Bonding the fibers in a partial bonding pattern. Other suitable known bonding methods include air bonding, especially when using short bicomponent fibers.

“Bulk” refers to the thickness of a sample as measured on a Model 49-70 thickness tester available from TMI (Testing Machine Inc.) of Amichiville, NY. The thickness tester is equipped with a 2 inch diameter circular foot and the measurement is performed under a pressure of about 0.2 / in 2 (psi). Is substantially dry (i.e., the water content, as measured by conventional methods, is typically about 1
The measurement of the bulk of the sample (less than 0%) is sometimes referred to as the dry bulk.

“CD direction” means the lateral or short direction of the product. "Cellulosic fiber" is present as one of the components in natural polymer aggregates such as wood pulp, bagasse and linter, or as a derivative of natural aggregates such as alpha pulp or viscose rayon Cellulose, which refers to fibers containing linear wettable polysaccharides. “Central region” means a central portion between the front region and the rear region of the product worn by the wearer, and is １ ／ of the total length of the garment. "Close" means that one part is placed as close as possible to another part due to other close structures, manufacturing limitations, comfort or wearability considerations, etc. I do.

“Coform” refers to a method of placing at least one melt blown die head near a chute for adding other materials to the web during web formation. Other such materials may be, for example, pulp, superabsorbent particles, cellulose or short fibers. The coform method is shown in U.S. Pat. No. 4,818,464 to Rowe and U.S. Pat. No. 4,100,324 to Anderson et al., Assigned to the present assignee. Webs made by the coform method are commonly referred to as coform materials. “Consisting essentially of” does not exclude the presence of additional materials that do not significantly affect the desired properties of the given synthetic or product. Typical materials of this type include pigments, antioxidants, stabilizers, surfactants, waxes, glidants, particles, and materials added to enhance the processability of the composite, It is not limited to this.

“Continuous” means that the described structure is a closed loop structure. The continuous structure may be unitary, i.e., a unitary structure, or may be configured with the individual components properly joined together to form a closed loop. "Disposable" means that the described clothing or article is designed to be used until it is soiled, either with urination, defecation, or otherwise, and then washed and discarded without re-use. means. Or, "disposable" is not limited to single-use or limited-use items; it is inexpensive to consumers and should be thrown away once it becomes dirty or unusable once or several times. It is also an article that can be made.

“Disposed,” “disposed on,” “disposed together,” “disposed on,” “disposed in close proximity,” or variations thereof, means that one component It is meant to be integrated or integrated with other parts, and that one part may be a separate structure joined or joined or arranged or located in close proximity to another part. "Elastic material" or "elastomer is a fiber", when referring to a film or fabric, has stretched at least 150% of its relaxed, unstretched length, or 1.5 times, when subjected to bias stress. When the bias length is reached and the tensile bias stress is relaxed, the stretched bias length means an extensible material that will recover at least 50% of its elongation.

“Elasticity”, “elasticity”, or “elasticized” refers to at least partially recovering the original size and shape when the stress that caused the deformation (expressed as a percentage) is removed. Or the properties of a synthetic elastic material. The term “elasticity can be imparted” refers to a member whose elasticity or elasticity is temporarily suppressed, but which can be activated to recover the elasticity. “Elastically imparted” means that the inherently inelastic material can be given elasticity by appropriately joining the inelastic material to the elastic material.

“Elongation” means the ratio (expressed in%) of the elongation of a material to the length of the material before elongation, and is expressed as follows. Elongated length−Original length / Original length × 100 “Extendable”, “extensible” or its deformation means that a material can increase its length (expressed in units of length). means. See also the extension section. "Elongate", "elongate", "elongate", or a deformation thereof, is a change in the length of a material that is increased by elongation, and is expressed in units of length. "Fabric" is used to describe all woven, knitted and non-woven webs.

“Filament” refers to a component having a large ratio of length to diameter or width and can include fibers, threads, strands, yarns, etc., or combinations thereof. "Complete product" means a product that is properly manufactured for its intended purpose. "Flexibility" is a material that is compliant and easily conforms to the overall shape and contours of the human body. “Front,” “front side,” or “front” refers to a front portion of an article or garment that is complementary to “rear,” “rear,” or “rear,” as defined above. .

Throughout this description, “before” or “after” is used to indicate a relationship to the garment itself, rather than an assumed position of the garment when placed on the wearer. The “front side area” is a garment front part that is worn on the front side of the wearer's body and corresponds to １ ／ of the entire length of the garment. "Completely gathered" means, for example, with respect to openings or boundaries,
It means that the material around the opening or border is gathered all around.

“Clothing” means any type of non-medical garment that can be worn. This includes industrial workwear and coveralls, underwear, pants, shirts, jackets, gloves, socks and the like. Or "garment" means any type of garment that can be worn. This includes industrial workwear and coveralls, underwear, pants, shirts, jackets, gloves, socks and the like.

“Hydrophilic” refers to a fiber or a surface of a fiber that gets wet when an aqueous liquid contacts the fiber. The degree of wetting of a material can be represented by the contact angle between the liquid and the material and the surface tension. Apparatus and methods suitable for measuring the wettability of a particular fiber material or blend of fiber materials can be obtained with the Kern SFA-222 Surface Force Analysis System. Fibers with a contact angle of less than 90 ° as measured by this system are said to be “wettable”, ie, “hydrophilic,” and fibers with a contact angle greater than 90 ° are “non-wettable,” ie, “hydrophobic.” Say that

“Entrapment layer” or “entrapment material” refers to a material designed to promote the slowing and spreading of a surge of aqueous liquid introduced into an absorbent pad. Examples of surge materials include: March 9, 1993; Proximia (Pro
U.S. Pat. No. 5,192,606 to Xmir et al .; U.S. Pat. No. 5,486,166 to Jan. 23, 1996; Ellis et al .; Feb. 2, 1996.
US Patent No. 5,490,846 to Ellis et al.
No. 5,509,915 issued to Hanson et al. On Apr. 23, 6th. These disclosures are incorporated herein by reference. The “trapping layer” or “trapping material” is also called a surge layer. "Integral" refers to the various parts of a single, unitary piece, rather than discrete structures that are joined together or placed next to or adjacent to each other.

“Inner” or “outer” refers to a position relative to the center of the absorbent garment, and in particular, in the lateral and / or longitudinal direction, at the longitudinal center and the lateral center of the absorbent garment. Close or far away. "Joint,""join,""joined," or a deformation thereof, when used to describe the relationship of two or more components, is when a component is heat sealed, ultrasonically bonded, thermally bonded, It means that it can be connected in any suitable way, such as glue, stitch, etc. Furthermore, the components can be joined directly, with one or more components inserted between them, all of which can be connected to one another.

“Layer” when used in the singular can have the dual meaning of a single part or a plurality of parts. “Liquid” is a flowing substance and / or material, meaning a substance and / or material that becomes the internal shape of the container into which it is poured or placed. As used herein, liquid means an aqueous material. “Liquid connection” or “liquid transfer” means that an aqueous liquid flows between (along) two structures.
It refers to the ability of an aqueous liquid to move through or between (or along) two structures without an aqueous liquid impervious barrier preventing movement.

“Liquid-impermeable” when used to refer to a layer or laminate having at least one aqueous liquid-impermeable film or layer, and at least one aqueous liquid-permeable film or layer, is commonly used. The condition means that at the point where the aqueous liquid contacts the laminate surface, the aqueous liquid does not pass through the laminate in a direction perpendicular to the laminate surface. The liquid may also spread or be transported parallel to the plane of the aqueous liquid impermeable film or layer, but this is not considered to be within the meaning of "aqueous liquid impermeable" when used in connection with a laminate. Alternatively, the laminate will be described as a two-layer or three-layer laminate including an “aqueous liquid impermeable film” and an “aqueous liquid permeable layer”. This is to avoid describing the "laminate" as being aqueous liquid impervious, and its impervious properties will depend on the aqueous liquid impervious film. Without using the above definition, the laminate would be "permeable" to the aqueous liquid because the aqueous liquid could escape / diffuse into the nonwoven layer and then across the top / end of the film. It should be noted that

“Machine direction” or “MD” means the length of the fabric in the direction of manufacture. By "cross-machine direction" or "CD" is meant the width of the fabric, ie, generally the direction perpendicular to the MD. The "MD direction" is the longitudinal direction of the product, typically the direction in which the product is manufactured. "Member", when used in the singular, can have the dual meaning of a single part or a plurality of parts.

“Microfiber” means a small diameter fiber having an average diameter not exceeding about 75 microns, for example, from about 0.5 microns to about 50 microns, and more particularly, The microfibers may have an average diameter from about 2 microns to about 40 microns. Another frequently used to describe fiber diameter is denier, which is defined as grams / fiber of 9000 meters, squaring the fiber diameter micron, multiplying by the density gram / cc and multiplying by 0.1 g / cc. 707 can be multiplied. A low denier indicates a thin fiber, and a high denier indicates a thick and heavy fiber. For example, the diameter of a polypropylene fiber, which is 15 microns, is squared, multiplying the result by 0.89 g / cc, and then 0.007 g / cc.
By multiplying by 07, it can be converted to denier. Thus, a 15 micron polypropylene fiber is about 1.42 (152 × 0.89 × 0.00707 = 1).
. 415) Denier. Outside the United States, the unit of measurement is more commonly "tex", defined as grams / fiber kilometer. The tex can be calculated as denier / 9.

“Single component fibers” refers to fibers that have been formed using only one polymer in one or more extruders. This means coloring, antistatic properties, lubrication,
It is not meant to exclude fibers molded with one polymer to which small amounts of additives have been added to obtain hydrophilicity. Such additives, such as titanium dioxide for coloring, are generally present at less than 5% by weight, typically about 2% by weight.

“Multilayer laminate” refers to a spunbond / meltblown / spunbond (SMS) laminate in which some of the layers are spunbond and some are meltblown and the United States as provided to Brock et al. No. 4,041,203; U.S. Pat. No. 5,169,706 to Colloier et al .; and U.S. Pat. No. 5,188,8 to Timmons et al.
No. 85 refers to a laminate such as that disclosed in US Pat. Such a laminate is formed by sequentially depositing a spunbonded fabric layer, then a meltblown fabric layer, and finally another spunbonded layer on a transfer molding belt, and then bonding the laminates in the manner described below. Can be manufactured. Alternatively, the fabric layers can be manufactured individually, collected and rolled, and combined in separate bonding steps. Such fabrics typically have a basis weight of about 0.1 to 12 osy (6 to 400 grams), or more specifically, about 0.75 to about 3 osy. Multi-layer laminates may also have various numbers of meltblown layers or multiple spunbond layers of many different constructions, film (F) or other foam materials such as coform materials such as SMMS, SM, SFC, etc. Materials can also be included. "Inelastic" refers to any material that does not fit the definition of "elastic".

By “nonwoven” or “nonwoven web” is meant a web having a structure of individual fibers or yarns that are superimposed on one another, but are not in an identifiable form as woven fibers. Nonwoven or nonwoven webs are formed in a number of ways, such as, for example, meltblowing, spunbonding, and bonded carded web methods. The basis weight of nonwovens is usually expressed in material ounces per square yard (osy) or grams per square meter (gsm), and the effective fiber diameter is usually expressed in microns. (Osy
It should be noted that the conversion from to gsm multiplies osy by 33.91. )

“Nonwoven web” means a web of material formed without using a woven or knitting process. Or, "nonwoven web" means a web having a structure of individual fibers or threads that are superimposed on one another, but that are not in a discernable repeating pattern. Conventionally, nonwoven webs have been formed by various methods, such as, for example, meltblowing, spunbonding, and bonded carded web methods. Alternatively, a "nonwoven web" refers to a web of material formed without using a woven or knitting process. Non-woven web, for example, melt blow method, spun bond method,
And various methods such as the bonded carded web method. The basis weight of nonwovens is usually expressed in material ounces per square yard (osy) or grams per square meter (gsm), and the effective fiber diameter is usually expressed in microns.

“Effectively joined,” “elastically coupled,” or “coupled to”
When referred to the attachment of an elastic member to another part, it means that when the elastic member is attached to, placed on, or formed from a part, it gives the part elastic properties. I do. When referred to the attachment of an inelastic member to another component, in any appropriate manner that allows the intended or described function to be performed without completely inhibiting the properties of the individual component. , Means that the members and components can be mounted or placed on each other. The attachment or arrangement may be direct such that any member is attached or arranged directly to the part, or indirectly by placing another member or part between the first member and the first part. Good.
Or, the elastic member is joined to the inelastic member, and the two joined members exhibit elasticity or elasticity. Or, "effectively joined" refers to the attachment of the elastic member to another component, when the elastic member is attached or connected to the component, or is treated with heat or a chemical. Means to impart elastic properties to a part when it is pulled, pulled, or similarly treated, and when referred to the attachment of an inelastic member to another part, is intended or described. In a suitable way to enable the function of the
It means that members and components can be attached. Joining, attaching, connecting, etc. may be direct, such as joining any member directly to the part, or indirect by placing another member between the first member and the first part. It can also be typical.

“Outer” refers to a position relative to the center of the absorbent garment, and in particular, a position laterally and / or vertically away from the longitudinal center and the lateral center of the absorbent garment. That is. "Partially elastic" means that at least one portion has an elastic substrate, clothing,
It is a part of clothing. “Particles such as SAPs or SAMs” include, but are not limited to, geometric or non-geometric, such as spherical granules, cylindrical fibers or strands, flat or rough, sheets, ribbons, strings, strands, and the like. Means geometric shape. The particles, when used in an absorbent structure, may be loosely formed or compressed into a formed structure.

“Permeable” or “permeable (or water permeable)” refers, for example, to the ability of an aqueous liquid to allow a gas to pass through a particular porous material. Permeability is measured in units of volume / unit time / unit area, for example, cubic feet / minute / square foot of material (
That is, it can be expressed by ft ³ / min / ft ² ). Permeability is measured using a Frazier Permeability Tester available from Frazier Precision Instruments, Inc. and is a federal test except that the sample size is 8 "x 8" instead of 7 "x 7" Measured according to Method 5450 Standard No. 191A. Permeability is usually described by the ability of air or other gas to pass through the permeable sheet, but a sufficient level of gas permeability corresponds to the level of permeability of an aqueous liquid that enables the practice of the present invention. Can be done. For example, if there is a sufficient level of gas permeability, an appropriate level of aqueous liquid can pass through the permeable sheet, with or without propulsion aids, such as, for example, an adaptive vacuum or adaptive gas pressure. it can.

“Personal care products” include diapers, training pants, absorbent pants,
Means adult incontinence products and feminine hygiene products. Alternatively, "personal care products" means diapers, training pants, absorbent pants, adult incontinence products, feminine hygiene products, and the like. “Polymer” generally includes, but is not limited to, homopolymers, eg, block, graft, copolymers such as random and alternating copolymers, terpolymers, and the like, and blends and variations thereof. Further, unless otherwise specifically limited, the term "polymer" includes all possible geometric arrangements of the molecule. Such configurations include, but are not limited to, isotactic, syndiotactic and random symmetry.

“Pulp” refers to pulp that contains fibers from natural sources, such as wood and non-wood. Wood includes, for example, deciduous and coniferous trees. Non-wood includes, for example, cotton, flax, esparto grass, milkweed, straw, jute, hemp, and bagasse. "Removably mounted", "removably coupled", "removably engaged", or a variant thereof, means that if one or both of the components does not exert a separating force, Two parts that are connected or connectable in a manner that tends to maintain a connection, and that can be separated without substantially permanently deforming or breaking. The required separation force is typically greater than the force generated while wearing the absorbent garment.

“Shrinkage” or its deformation refers to a change in which the length of the stretched material decreases upon removal of the stretching stress. "Side" refers to a position where the flank of the body faces its support surface. "Spunbond fibers" include, for example, U.S. Patent No. 4,340,563 to Appel et al., And U.S. Patent No. 3,692,618 to Dorschner et al., Matsuki. U.S. Pat. No. 3,802,817 to Kinney et al., U.S. Pat.
Nos. 38,992 and 3,341,394; U.S. Pat. No. 3,502,763 to Hartman; and U.S. Pat. No. 3,542,615 to Dobo et al. Extrusion of the molten thermoplastic material as filaments from a plurality of narrow, usually circular capillaries of a spinneret, as shown in That is. Spunbond fibers are generally not tacky when deposited on a collection surface. Spunbond fibers are generally continuous and have an average diameter (
At least 10) is greater than 7 microns, and more particularly between about 10 and 20 microns.

“Short fibers” refers to lengths cut from natural fibers or, for example, manufactured filaments. Short fibers typically have a length between about 3 millimeters and 7.5 millimeters. "Stretch", "extensibility", "stretch properties", or variations thereof, means that a material is capable of increasing its length (expressed in units of length). See also "extensible". "Stretched connection" refers to a method by which an elastic member is joined to another member while only the elastic member is stretched at least about 25% of its relaxed length. The "stretch bonding laminate" is a composite made by a stretch bonding method, that is, a method in which only elastic layers are stretched and the layers are joined to each other so that gathers approach the inelastic layers when the elastic layers are relaxed. Elastic material. Such laminates typically have stretch properties in the machine direction, and may be stretched to the extent that inelastic materials gathered between bonding sites can stretch the elastic material. One type of stretch bonded laminate is described, for example, in U.S. Pat.
No. 415, which uses the same multilayer polymer produced in multiple banks of extruders. Other composite elastic materials are U.S. Pat. No. 4,789,699 to Kieffer et al. And U.S. Pat.
No. 781,966 and U.S. Pat.
57,802 and 4,652,487 and U.S. Pat. No. 4,655,760 to Morman et al.

“Base layer”, “surface”, or “sheet” refers to a film or woven or non-woven web; a laminate that is permeable or impermeable to air, gas, and / or aqueous liquids; It refers to a layer that can have a composite structure with an absorptive medium in between the backsheet. A "superabsorbent" is capable of absorbing at least 10 grams of an aqueous liquid (eg, distilled water) per gram of absorbent material while immersed in the liquid for 4 hours, with about 1.
An absorbent material capable of retaining substantially all aqueous liquids even when a compressive force of 5 psi or less is applied. A "surge layer" is a material designed to help slow down and spread a surge of aqueous liquid introduced into an absorbent pad. An example of a surge material is 19
On March 9, 1993, D.C. US Patent No. 5,192,6, issued to Proximia et al.
06; U.S. Pat. No. 5,486, issued Jan. 23, 1996 to Ellis et al.
No. 166; U.S. Pat. No. 5,490, issued to Ellis et al. On Feb. 13, 1996.
And U.S. Patent No. 5,509,915, issued to Hanson et al. On April 23, 1996. These disclosures are incorporated herein by reference. The "surge layer" is also referred to as a trapping layer or trapping material.

“Surface” includes layers, films, wovens, nonwovens, laminates, composites, and the like, and is permeable or impermeable to air, gas, and / or aqueous liquids. "Tension" may be a force that tends to stretch the body, or it may be a balancing force within the body that resists stretching. Tension is expressed in grams. "Thermoplastic" refers to a material that softens when exposed to heat and returns to a substantially non-soft state when cooled to room temperature.

“Ventant bonding” or “TAB” refers to the bonding of nonwoven bicomponent fibrous webs that forces substantially hot air through the web to melt one of the polymers that make up the fibers of the web. Means the way. The speed of the air is between 100 and 500 feet / min, and the dwell time can be as long as 6 seconds. Bonding is obtained by melting and re-solidification of the polymer. Breathable bonds are relatively limited in variability, and breathable bonds TAB can be used to form bicomponent webs, such as conjugated fibers or fibers containing adhesives, because at least one component must be melted to bond. Limited. In the vented coupling device, air having a temperature above the melting point of one component and below the melting point of the other component passes from the surrounding hood through the web and is directed to perforated rollers that support the web. Alternatively, the vent coupling device can be in a planar configuration, where air is directed downward and vertically to the web. The working conditions of the two arrangements are the same, the main difference being the geometry of the web during splicing. Hot air melts the low melting polymer component, creating bonds between the filaments and integrating the web.

“Two-dimensional” refers to diaper-like clothing that can be unfolded and flattened without breaking the structure destructively. This type of garment does not have continuous leg and waist openings when placed on a flat surface and requires a refastening device, such as an adhesive tape, to be worn by the wearer. "Waist band" refers to the boundary around the waist opening of the pants, and may be comprised of one or more layers of material. The invention will be more fully understood and further points will become apparent with reference to the following detailed description of the invention and the drawings.

BEST MODE FOR CARRYING OUT THE INVENTION The following detailed description is based on an article 10 that includes a disposable pant 12 in which, in use, an absorbent core is placed in place. However, it is clear that the invention can be used in adult, pediatric and baby products for incontinence, sweat secretions, vaginal secretions and the like.

The disposable pants 12 of FIG. 1 a show a preferred embodiment of the invention in a planar configuration before assembly. In FIG. 1a, the underpants 12 have a front body 14,
Rear body 15, front waist 44, rear waist 45, crotch 18, waist liner 26
(Optional, shown in FIGS. 5 and 7), leg liner 38 (optional, shown in FIGS. 5 and 7)
And having an outer cover 13 with a body liner 80. The outer cover 13 includes a front body portion 14, a rear body portion, a front waist edge portion 44, and a rear waist edge portion 45.
, And a crotch portion 18, in which case the crotch portion 18 is provided between the front body portion 14 and the rear body portion 15.

The outer cover 13 is compliant and soft to the wearer. The outer cover 13 may be a soft, flexible and porous sheet that is liquid permeable and easily penetrates liquid through its thickness, or liquid impermeable and resistant to liquid permeation through its thickness. . Suitable outer covers 13 can be made of a wide variety of materials such as natural fibers (eg, wood or cotton fibers), synthetic fibers (eg, polyester or polypropylene fibers), and include both natural fibers and synthetic fibers or reticulated foam. And a perforated plastic film.

There are a number of manufacturing techniques that can be used to manufacture the outer cover 13. For example, the outer cover 13 may be a woven or non-woven web or sheet such as a spunbond, meltblown, or bonded carded web composed of synthetic polymer filaments such as polypropylene, polyethylene, polyester, or rayon or cotton. And a web of natural polymer filaments such as Bonded carded webs can be thermally bonded by means well known to textile manufacturers,
A binder can also be sprayed. A non-woven spunbond is suitable for the outer cover 13. Ideally, the outer cover 13 is a spunbond polypropylene nonwoven having a wire woven bond pattern. A suitable spunbond material is a spunbond material available from Kimberly-Clark, Inc. of Roswell, Georgia. The outer cover 13 weighs from about 0.3 oz / square yard (osy) to about 2.0 osy, or about 0.6 osy. Pants outer cover 13
Can be printed, colored, or decoratively embossed. The outer cover 13 has a hole diameter that allows air, sweat, and evaporated substances to easily pass through because the material is breathable. The outer cover 13 can be selectively embossed or perforated with discontinuous slits or holes extending over one surface.

Referring to FIGS. 1 a, 2 a and 3, the edge 60 of the front body 14 is combined with the edge 62 of the rear body 15 to form a seal or side seam 64. . Similarly, the edge 66 of the front body 14 is combined with the edge 68 of the rear body 15 to form a seal or side seam 70. When the front body portion 14 and the rear body portion 15 are combined, a waist opening 20 for attaching and detaching the pants 12 is formed.
The waist opening 20 is at least partially surrounded by a waist elastic 22 comprising elastic strands, threads, ribbons or bands of elastic material between reference numerals 1 and 40. The waist elastic body 22 is extended and attached to the main bodies 14 and 15. In addition, the waist elastic body 22 can be disposed on the front and rear waist edges 44 and 45. (In another embodiment, the waist elastic body 22 includes only the front side main body portion 14,
Or, it is provided only in the rear body 15). The waist elastics 22 are loosened when attached to the waist to create folds, gathers, or pleats 24 (shown in FIGS. 4 and 5), allowing the waist opening 20 and the body portions 14 and 15 to extend. , The pants 12 can fit humans of various sizes.

Since the user of the present invention generally prefers brief-type pants, the front waist edge 44 of the pants 12 is preferably located around the navel, and further around the waist of the wearer. With the pants 12 at this height, the front and rear body portions 14 having waist elastics 22
Pulling up either or both of them will provide a snug fit. Alternatively, pants may be in the form of bikini (eg, regular leg cut and French leg cut) and hipster (eg, regular leg cut or French leg cut)
Can be included.

In some embodiments, the waist opening 20 comprises a strand of elastic material between 1 and 10 stretched and attached to the front waist 44 and / or the back waist 45. It is surrounded by a waist elastic body 21 having a ribbon or a band. (See FIGS. 5 and 7.) (In other embodiments, the waist elastic body 21 is included only in either the front waist edge 44 or the rear waist edge 45.) The waist elastic body 21 The pants 12 can be loosened when attached to create waist folds, gathers, or pleats 25 and extend the waist opening 20, so that the pants 12 can fit humans of various sizes. By using the waist elastic body 21 having a tension or elongation different from the tension or elongation used in the waist elastic body 22, the pants 12 having an excellent fit can be obtained.

Referring again to FIG. 1a, the front body portion 14 and the rear body portion 15 together with the crotch portion 18 form leg openings 28 and 30, respectively, the shape of the leg openings being generally circular or elliptical. is there. The leg openings 28 and 30 are each at least partially surrounded by leg elastics 32, 33, 34 and 35, respectively. Front leg elastic body 3
2 and 33 are attached to the front body 14 by being extended, and the rear leg elastics 34 are provided.
And 35 are extended and attached to the rear body portion 15, and the crotch elastic members 37 and 3 are extended.
9 is extended and attached to the crotch portion 18. Leg and crotch elastic bodies 32, 33,
34, 35, 37, and 39 are loosened after installation to create leg gathers (also referred to as folds or pleats) 36 and to provide leg openings 28 and 30 with extensibility to provide variously sized legs. Fits.

Normally, the front body 14 is divided into an upper front body 40 and a lower front body 42. (See FIGS. 1a, 2a, and 3.) Similarly, the rear body 15 is divided into an upper rear body 41 and a lower rear body 43. The upper front and upper rear body portions 40 and 41 extend the waist elastics 22 which can be extended to allow the wearer to wear the pants 12 and then easily contracted to conform to the wearer's body. Preferably, it is designed to include. Thereby, it is possible to fit a wearer of various body types and physiques exactly or comfortably. The waist elastic body 22 includes the waist opening 20 and the leg openings 28 and 30 on both the upper front side and the upper rear side main bodies 40 and 41.
The pants 12 are particularly excellent in fit around the body for the wearer. The lower front side and lower rear side main body parts 42 and 43 do not necessarily need the waist elastic body 22. The basis weight of the laminate including the outer cover 13, the body liner 80, and the waist elastic body 22 can be about 5 osy.

The crotch 18 of the pants 12 is made of an absorbent barrier composite. The absorbent barrier composite 46 can extend to the front body portion 14 and / or the rear body portion 15 and is typically extended. (See FIG. 1a.) Further, the absorbent barrier composite 46 includes a liquid barrier 48, a substantially liquid permeable topsheet layer 49, and an absorbent core sandwiched between the liquid barrier 48 and the topsheet layer 49. 50. The liquid barrier 48 and the topsheet layer 49 are preferably longer and wider than the absorbent core 50 so that the perimeter of the liquid barrier 48 and the topsheet layer 49 forms an edge. They can be sealed to each other by ultrasonic bonding, thermal bonding, adhesive, or other suitable means. In this sealed area, crotch elastics 37 and 39 can be incorporated between liquid barrier 48 and topsheet layer 49. The absorbent core 50 has an ultrasonic coupling,
The liquid barrier 48 and / or the topsheet layer 4 may be bonded using an adhesive or other suitable means.
9 can be attached. (See FIGS. 1a, 8, and 9.)

The absorbent barrier complex 46 can include additional components to help capture, distribute, and retain extracorporeal exudates. For example, the absorbent barrier complex 46 is 1989
U.S. Pat. No. 4,798, issued to Meyer et al.
No. 603, or a surge control layer as described in European Published Patent Application EP 0 539 703 A1, issued May 5, 1993. This patent and application are incorporated herein by reference. Such a layer is also called an acquisition / distribution layer.

The absorbent barrier composite 46 can be constructed by preparing a topsheet layer 49 and a liquid barrier 48 material and sandwiching individual absorbent cores 50 between the liquid barrier 48 and the topsheet layer 49. it can. Around the sides and ends of the liquid barrier 48 and the topsheet layer 49 outside the absorbent core 50, the crotch portion 18, the front body portion 14, and the rear body portion 15 are joined to seal each other. it can. Absorbable barrier composite 46
And / or the absorbent core 50 can optionally be T-shaped, I-shaped, elliptical, hourglass-shaped, rectangular, or irregularly shaped. In addition, the absorbent barrier composite 46 and / or the absorbent core 50 may be connected to the longitudinal sides 87 and 89 of the absorbent barrier composite 46, the longitudinal edges 59 and 61 of the absorbent core 50 and / or the disposable pants 12. Vertical edge 1
Counterbore 29 and 31 which are opposing recesses of 04 and 106 can also be provided. The leggings 29 and 31 reduce the bulkiness between the wearer's legs and thus reduce or prevent gaps, thereby improving the fit of the disposable pants 12 and preventing leakage and improving comfort. it can. Also, other materials used for disposable pants 12 include, but are not limited to, topsheet 49, liquid barrier 48
, And an outer cover 13, and can also be molded to include leggings 29 and 31. However, in some embodiments, the absorbent core 50 is molded to include the fins 29 and 31 and the topsheet layer 49, the liquid barrier 48,
It may also be desirable that other materials, including the outer cover 13 and the outer cover 13, are not molded to include the fins 29 and 31. Absorbent barrier composite 46 and / or absorbent core 5
The 0, legholes 29 and 31 are typically not symmetrically disposed on the disposable pants 12 and are asymmetric in the direction of the front edge 103 of the disposable pants 12.

Throughout this application, the term “substantially rectangular” is used by the applicant. However, the term is not intended to be limited to rectangles only. Rather, it can include rectangular, elliptical or athletic track shapes, hourglass shapes, bilobals, and any shape geometric shape that is generally greater or less than wide in length. 1a, 1b, 1c, 2a, 2b, 3, 10, 11, and 1
Referring to FIG. 2, the absorbent core 50 is substantially rectangular and has side edges 59 and 61,
It has a peripheral edge 67 having a front edge 55 and a rear edge 57. The absorbent core 50 has an outer surface 63 not facing the wearer and an inner surface 65 facing the wearer.

The porous fiber matrix of the absorbent core 50 may be formed in a number of ways, for example, according to the teachings of Mazurak and Fries as described in US Pat. No. 4,381,782. Preferably, it is an air-laid core of fluff and superabsorbent material. This disclosure is incorporated herein by reference. Referring to FIGS. 13a, 13b, 14, 15a and 15c, the absorbent core 50 comprises a super absorbent material (SAP) 110 and fibers 112,
Preferably it comprises an air-formed mixture of fluff pulp. Most preferably, FIG.
As shown in FIGS. 13b and 14, the fluff fiber 112 and the superabsorbent material 110
Is homogeneous. In another embodiment, FIGS. 15a, 15b, and 15
As shown in FIG. c, the mixture is laminated (FIG. 15a), layered and the superabsorbent material is placed at a specific machine direction location (FIG. 15b), or placed in a narrow lateral band. (FIG. 15c). In addition to fluff pulp, fibers such as chemically cured and heat-processed pulp can also be used. Further, the absorbent core 50 can include absorbent materials other than air-formed fluff and SAP. For example, if the coform material also includes an absorbent material, the coform material referred to in U.S. Pat. No. 4,818,464 to Rowe and U.S. Pat. No. 4,100,324 to Anderson may be used. Absorbers can be made using foam materials. In addition, a wet molded composite material comprising a combination of fibers and superabsorbent materials as disclosed in US Pat. No. 5,651,862 to Anderson et al. Also, stabilized air-laid materials comprising a mixture of fibers, bonded fibers, and superabsorbent materials bonded together by latex bonding or air bonding can be used as absorbent materials.

It is desirable that the hydrogel polymer be sufficiently crosslinked to render the material substantially water insoluble. Crosslinking may be by, for example, radiation treatment or by covalent, ionic, van der Waals or hydrogen bonding. Suitable materials are
It is available from various distributors such as Dow Chemical (Drytech 2035LD), Hoechst Celanese and Allied Colloid. Typically, a superabsorbent material can absorb at least about 15 times its weight of water, and desirably can absorb more than about 25 times its weight of water.

The superabsorbent material can be distributed or incorporated into the absorbent core 50 using various techniques. For example, FIGS. 13a, 13b, 14, 15a, and 15
b, and as shown in FIG. 15c, the superabsorbent material may be substantially evenly distributed between the fibers that make up the absorbent core 50. Also, the material is a liquid barrier 48.
It can also be distributed non-uniformly in the absorbent core 50 so as to form a substantially continuous gradient of increasing or decreasing concentration of the superabsorbent material as measured by observing the concentration inward from. Alternatively, the superabsorbent material may include a separate layer separate from the fiber material of the absorbent core 50, or may include a separate layer integrated with the absorbent core 50.

The absorbent pad 50 can also include a wrap layer 100 to maintain the integrity of the fibrous core. (See FIG. 8.) The wrap layer 100 is made of cellulosic tissue or spunbond, meltblown or bonded composed of synthetic polymer filaments such as polypropylene, polyethylene, polyester or natural polymer filaments such as rayon or cotton. A carded web material can be included. The absorbent core 50 must have an aqueous liquid capacity sufficient to absorb about 10 grams to about 1500 grams of waste. The absorbent core 50 preferably has a capacity (described below), and preferably has a thickness of less than about 25 mm, which provides a less bulky and flexible fit. The capacity of the absorbent core 50 should be from about 200 grams to about 1300 grams in total volume. Preferably, the absorbent core 50 should have a total capacity of at least about 300 grams and not more than about 1200 grams. More preferably, the total capacity of the absorbent core 50 should be from about 400 grams to about 800 grams.

The total capacity of the absorbent core 50 is measured using the absorbent barrier composite 46 of the pants 12 and the outer cover 13. The saturation retention capacity is a measure of the total absorption capacity of the absorbent article 10, in this case, the disposable pants 12. The saturation retention capacity is measured as follows. The disposable pants 12 to be tested have a water content of less than about 7% by weight,
It is then weighed and submerged in an excess of room temperature (about 23 ° C.) saline described below. The material is allowed to soak for 20 minutes. After 20 minutes, disposable pants 1
2 was removed from the saline and placed on a Teflon coated fiberglass screen (sold by Taconic Plastics, Inc., Petersburg, NY) having 0.25 inch openings, and This screen is placed on a vacuum box and covered with a flexible rubber dam material. Vacuum at 3.5 kilopascals (0.5 pounds per square inch) in a vacuum box for 5 minutes. The weight of the disposable pants 12 is measured. The amount of aqueous liquid retained by the test material is
It is determined by subtracting the dry weight of disposable pants 12 from the wet weight of disposable pants 12 (after applying vacuum) and is reported in grams of aqueous liquid retained as saturated retention volume.

The saline solution is an aqueous solution of about 0.9% sodium chloride by weight. A suitable product is Baxta Diagnostics, located at McGaw Park, Illinois (Bax
S / P ™ certified blood saline available from ter Diagnostics. The absorbent core 50 comprises a material that is adapted to absorb and retain urine, menstruation, blood, or other excrement. The absorbent core 50 can include various natural or synthetic absorbent materials such as cellulosic fibers, surfactant treated meltblown fibers, wood pulp fibers, regenerated cellulose or cotton fibers, mixtures of pulp and other fibers, and the like. One such material is a coform material composed of a mixture of cellulosic fibers and synthetic polymer fibers. Also, the absorbent core 50 can include 0-95% by weight of a compound that increases absorption, such as an organic or inorganic superabsorbent material, such a superabsorbent material typically comprising Can absorb at least about 15 times, desirably 25 times or more of the water.

[0069] Organic superabsorbent materials can include natural materials such as pectin, guar gum and peat moss, as well as synthetic materials such as synthetic hydrogel polymers. Such hydrogel polymers can include, for example, carboxymethylcellulose, alkali metal salts of polyacrylic acid, polyacylamide, polyvinyl alcohol, ethylene maleic anhydride copolymer, polyvinyl ether, hydroxypropyl cellulose, polyvinyl morpholinone, and vinyl. Polymers and copolymers such as sulfonic acids, polyacrylates, polyacrylamides, polyvinylpyridines and the like can also be included. Other suitable polymers may include hydrolyzed acrylonitrile graft paste, acrylic acid graft paste, and isobutylene maleic anhydride copolymer and mixtures thereof.

Suitable superabsorbent materials are described in Kelleberger, Oct. 13, 1987.
U.S. Pat. Nos. 4,699,823 and 1992 to Nberger et al.
No. 5,147,343 issued to Kerenberger on September 15, 1998. These disclosures are incorporated herein by reference. Superabsorbent materials are available from various vendors such as Dow Chemical, Stockhausen, Hoechst Celanese, and Alide Colloids.
The absorbent core 50 can also include a tissue layer, or a capture or distribution layer, to help maintain the integrity of the fiber absorber and transport the aqueous liquid.

In addition, the absorbent disposable pants 12 may include additional components that assist in capturing, distributing, and retaining extracorporeal waste. For example, the absorbent disposable pants 12 include 1
Transfer or surge layer (entrapped material) 114, or 19, as described in U.S. Pat. No. 4,798,603, issued Jan. 17, 989 to Meyer et al.
U.S. Pat. No. 5,486,166, issued Jan. 23, 1996 to Bishop et al., And U.S. Pat. No. 5,364, issued Nov. 15, 1994 to Latimer et al.
No. 382, U.S. Pat. No. 5,490,846 to Ellis et al., U.S. Pat. No. 5,429,629 to Latimer et al., And U.S. Pat. No. 5,509,915 to Hanson et al. U.S. Pat.
No. 92,606 and European published patent application EP0539 issued May 5, 1993.
A surge management layer as described in 703A1 can be provided. These patents and applications are incorporated herein by reference. Such a layer may also be referred to as an acquisition / distribution layer. Surge layer (capture material) 114
Is within about 0 inches (0 cm) to about 4 inches (10.2 cm) of the front edge 55 of the absorbent core 50, typically less than about 0 inches (0 cm) than the front edge 55 of the absorbent core 50.
Inches (0 cm) to about 2 inches (5.1 cm), and most typically from about 0 inches (0 cm) to about 1 inch (2.5 c) from the front edge 55 of the absorbent core 50.
m).

The length of the surge layer (capture material) 114 is typically about 5 inches (12.
7 cm) and about 19 inches (48.3 cm), typically about 8 inches (28.3 cm).
0.3 cm) and about 16 inches (40.6 cm), and most typically between about 10 inches (25.4 cm) and about 14 inches (35.8 cm). The length of the surge layer (capture material) 114 is typically about 12 inches (30.5 cm).
). The acquisition / distribution layer 52 is disposed on the aqueous liquid holding layer 51 toward the body-facing surface 16 of the absorbent core 50 to reduce the surge of aqueous liquid that may be introduced into the absorbent core 50. And help spread. The acquisition / distribution layer 52 comprises a blend of 40% 6 denier polyester fiber commercially available from Hoechst Celanese and 60% 3 denier polypropylene / polyethylene sea core bicomponent fiber commercially available from Chisso. And the total basis weight is about 50 gsm to 1
It may have a breathable bonded carded web ranging up to 20 gsm.

Alternative capture / dispensing materials include those described by D.M. U.S. Patent No. 5,192,606 to Proximia et al .; January 2, 1996.
U.S. Patent No. 5,486,166, issued to Ellis et al. On March 3; U.S. Patent No. 5,490,846, issued Feb. 13, 1996 to Ellis et al .; and 1996.
No. 5,509,915, issued to Hanson et al. These disclosures are incorporated herein by reference. The illustrated acquisition / distribution layer 52 has a length of about 191 mm and a width of about 45 mm.
mm. The shape and size of the acquisition / distribution layer 52 depend on the absorbent core 5
0 and may be varied as disclosed for disposable pants 12.

One suitable absorbent core 50 comprises an aqueous liquid holding layer 52 in which the basis of the absorbent components such as fluff, pulp, and superabsorbent (SAP) is provided. The amount is generally continuous along the length of the MD of the absorbent core 50. The distribution of the absorbent component is substantially uniform in at least the Y direction, preferably in the X and Y directions, and can be uniform in the absorbent core 50 also in the Z direction. The basis weight of the absorbent core 50 may range between about 80 gsm and about 1,000 gsm. Preferably, the acquisition / distribution layer 52 is disposed over the aqueous liquid holding layer 51, and the acquisition / distribution layer 52 is typically moving forward over the aqueous liquid holding layer 51. The fluff pulp / SAP ratio ranges from about 100: 0 to about 40:60, typically about 80:20.
To about 50:50.

The gauze 140 is substantially rectangular and has a peripheral edge 142 with a leading edge 144, a trailing edge 146, and side edges 148 and 150 (see FIG. 12). Gauze 14
0 has an outer surface 152 not facing the wearer and an inner surface 154 facing the wearer. The gauze 140 has a width and a length smaller than the width and the length of the absorbent core, respectively, as compared with the absorbent core 50. In this regard, the length of gauze 140 measures between its leading edge 144 and trailing edge 146, and the width of gauze 140 measures between its side edges 148 and 150. The length of the absorbent core 50 is the front edge 55
And the width of the absorbent core 50 is measured between the side edges 59 and 61.

The gauze 140 is most preferably made of a blend of fibers comprising from about 15 to about 30% by weight polypropylene or polyethylene fibers and from about 85 to about 70% by weight wood pulp fluff fibers having a basis weight of from about 100 to about 100%. It is about 525 gsm. Additionally, about 10 to about 300 gsm of superabsorbent is added. The gauze 140 may be formed on a tissue or spunbond carrier sheet or may be formed without a carrier sheet. The gauze 140 is shown in the drawing to have a dry thickness approximately equal to the dry thickness of the absorbent core. However, it should be understood that gauze 140 and absorbent core 50 may be of different thicknesses. For example, gauze 140 can be about 1.5 to about 4 times as thick as absorbent core 50.

The gauze 140 can be symmetrically arranged on the central longitudinal axis AA, BB of the disposable pants 12 respectively. In this position, the leading edge 14 of the gauze 140
4 and the trailing edge 146 are equidistant from the leading edge 90 and the trailing edge 92 of the topsheet layer 49, respectively, and the side edges 148 and 150 of the gauze 140 are spaced from the side edges 94 and 150 of the topsheet layer 49. 96 from each other. Furthermore, in this position,
The absorbent core 50 extends beyond the peripheral edge 142 of the gauze 140. However, the gauze 140 has a top sheet layer 49, as shown in FIG. 12, where either the leading edge 144 or the trailing edge 146 is symmetric about the central longitudinal axis AA. At least two inches from each of the leading edge 90 or the trailing edge 92 (5.
1 cm). In other words, the gauze 140 can be asymmetric with respect to the transverse axis BB.

In another embodiment according to the present invention, the disposable pants 12 include a single-layer absorbent core 50. The absorbent core 50 comprises a material adapted to absorb and retain urine, menses, blood or other bodily excretions. The absorbent core 50 may comprise various natural or synthetic absorbent materials such as cellulose fibers, surfactant treated meltblown fibers, wood pulp fibers, regenerated cellulose or cotton fibers, blends of pulp with other fibers, and the like. Can be. One such material is a coform material composed of a mixture of cellulosic fibers and synthetic polymer fibers. In addition, the absorbent core 50 may include 0-95% by weight of a compound that increases absorption, such as an organic or inorganic superabsorbent material. Such compounds can typically absorb at least about 15 times, and desirably 25 times, their weight of water. Suitable superabsorbent materials include U.S. Pat. No. 4,699,823, issued to Kelenberger et al. On Oct. 13, 1987; and U.S. Pat. 147,343. These disclosures are incorporated herein by reference. Superabsorbent materials are available from various vendors such as Dow Chemical, Hoechst Celanese, and Alide Colloid.

The absorbent core 50 provides a structure capable of transporting an aqueous liquid, which can be characterized in the x and y directions and further in the z direction. The transfer of the aqueous liquid in the z-direction is a property of escape and movement by gravity.
There, the aqueous liquid moves away from the body of the wearer. Aqueous liquid x
The transfer in the direction and in the y direction is the movement and / or escape of the aqueous liquid along the length and width of the absorbent core 50. As will be appreciated, both the movement of the aqueous liquid away from the wearer and the movement along the length and width of the absorbent core 50 causes the aqueous liquid to move toward the distal end of the absorbent core 50. The use area of the absorbent core 50 is increased, and as a result, the absorption characteristics of the absorbent core are improved.

FIGS. 1 a, 1 b, 1 c, 2 a, 2 b, 3, 10, 11 and 1
As shown in FIG. 2, the width of the absorbent core 50 is measured between the side edges 59 and 61. The length of the absorbent core 50 is measured between the front edge 55 and the rear edge 57. The width and length of the absorbent core 50 are smaller than the width and length of the corresponding container 73 composed of the liquid barrier 48 and the aqueous liquid permeable topsheet layer 49, respectively.
The width of the container 73 is measured between the side edges 79 and 81, and the length of the container 73 is measured between the front edge 75 and the rear edge 77. However, the width of the absorbent core 50 may exceed the width of the pants product container 73.

The entire length of the absorbent core 50 must be of an appropriate length to help prevent aqueous liquid seepage during sleep or sitting. Referring to FIGS. 10, 11 and 12, for the purposes of the present invention, the central zone 56 is located at the center of one third of the total length of the product located between lines 4-4 and 5-5. is there. The front side area 54 includes the disposable pants 12
, One-third of the total length of the disposable pants 12 product, located between the line 4-4 and the front edge 103, and is typically worn on the front side of the wearer's body. The rear area 58 of the disposable pants 12 is one-third of the length of the disposable pants 12 between the line 5-5 and the back edge 105 of the disposable pants 12, and is typically of the wearer's body. It is worn on the back side. This entire length is at least about 10 inches (254 mm) so that it extends beyond the central section 56 along the longitudinal centerline AA of the disposable pants 12. Alternatively, the length can be from about 12 inches (305 mm) to about 30 inches (762 mm).
mm), typically from about 15 inches (381 mm) to about 23 inches (5 mm).
84 mm). Common length ranges are from about 15 inches (381 mm) to about 21 inches (533 mm), and typically range from about 17 inches (432 mm) to about 20 inches (508 mm). Optionally,
The length of the absorbent core 50 is about 19 inches (483 mm).

The width of the absorbent core 50 extends beyond the crotch portion 18 and needs to be at least equal to the width of the crotch portion 18. The width of the absorbent core 50 may be less than the width of the crotch 18, but the leakage containment capability may be weakened. In some cases, the width of the absorbent core 50 is increased beyond the crotch 18, especially if the disposable pants 12 have the legs 29 and 31 in the central area 56. The absorbent core 50 mainly comprises the front area 5
4, the leggings 29 and 31 are also disposable trousers because they are located in the central area 56 and the rear area 58 is less forwardly displaced along the longitudinal axis of the disposable trousers 12; It will be appreciated that the anterior transition along the longitudinal axis of 12 will conform to the position of the disposable pants 12 on the wearer's body. The width of the absorbent core 50 extending beyond the crotch 18 is approximately 2.5 inches (6 inches).
4 mm) to about 12 inches (305 mm), or about 4.0 inches (102 mm)
) To about 10 inches (254 mm). A common width is about 5 inches (1
27 mm) to about 9 inches (229 mm).

The present invention contemplates various shapes for the absorbent core 50. One of the preferred composite products
One has a non-rectangular shape, such as an hourglass or an I-beam shaped absorbent core 50. Another preferred embodiment of the absorbent core 50 is a rounded rectangular end. The essentially rectangular absorbent core 50 (i.e., hourglass shape) is more preferred because it has a square end and can flatten the appearance of the back of the disposable pants 12 while comfortably fitting the body contours.

The absorbent core 50 is symmetrical with respect to the central longitudinal axis AA of the disposable pants 12 and is arranged to be asymmetric in the forward direction along the central transverse axis BB of the disposable pants 12. I have. In other words, side edges 59 and 61 of absorbent core 50 are equidistant from side edges 94 and 96 of aqueous liquid permeable topsheet layer 49, respectively. The front edge 55 and the rear edge 57 of the absorbent core 50 are not equidistant from the front edge 103 and the rear edge 105 of the aqueous liquid permeable topsheet layer 49, respectively. The absorbent core 50 is disposed in the front section 54, the center section 56, and the back section 58. The front edge 103 of the absorbent core 50 is about 10 inches (254 mm) to about 1 inch (25 mm) from the front edge 103 of the disposable pants 12, preferably about 9 inches (229 mm) to about 2 inches ( 51 mm), most preferably from about 8 inches (203 mm) to about 3 inches (76 mm). Optionally, the distance is about 3 inches (76 mm). The rear edge 105 of the absorbent core 50 is 3 inches (76 mm) to about 13 inches (330 mm), preferably about 5 inches (127 mm) to about 12 inches from the rear edge 105 of the disposable pants 12. (3
05 mm), most preferably from about 6 inches (152 mm) to about 11 inches (27 mm).
9 mm).

FIGS. 1 a, 1 b, 1 c, 2 a, 2 b, 3, 10, 11 and 1
Referring to FIG. 2, an absorbent core 50 that is asymmetrical in a forward direction along a central transverse axis.
In order to better understand what it means, it is helpful to define an "asymmetry factor", which is the length of the absorbent core 50 that is greater than the length of the front zone 54 than the rear zone 58.
In combination with the presence of a longer absorbent core 50 (the absorbent core 50 is not symmetrically arranged in the longitudinal direction and is asymmetric in the forward direction within the disposable pants 12) to help define the present invention. For purposes of the present invention, “not symmetrically arranged” means that there is about 20 mm or more more absorbent core 50 in front section 54 as compared to rear section 58. The asymmetry coefficient is calculated using the following steps. 1. The length of the disposable pants 12 is divided into three equal length sections: a front section 54, a center section 56, and a rear section 58. 2. The length of each section is measured in the longitudinal direction, that is, the MD direction of the absorbent core 50 along the line AA in FIGS. 10, 11, and 12. 3. The asymmetry factor is calculated by dividing the length of the absorbent core 50 in the rear section 58 by the sum of the length of the absorbent core 50 in the front section 54 and the central section 56.

Referring again to FIGS. 1 a, 1 b, 1 c, 2 a, 2 b, 3, 10, 11 and 12, the absorbent disposable pants 12 are suitable for wearers from infants to adults. The absorbent core 5 may have a wide range of product lengths to fit
The asymmetry factor associated with having more zeros in the front section 54 than in the rear section 58 helps to account for the amount of forward asymmetry of the absorbent core 50 relative to the length of the product. The asymmetry factor depends on the overall length of the absorbent core 50 and the disposable pants 12
Is a function of how they are arranged in The asymmetry factor is also a function of the length of the disposable pants 12 since the overall length of the disposable pants 12 affects the amount of absorbent core 50 present in the front section 54, the central section 56, and the back section. . Placing the absorbent core 50 within the disposable pants 12 of various product designs and sizes depends on how the particular disposable pants 12 are designed to fit the wearer's body and the disposable. It depends on the ability of the manufacturing process to control the placement of the absorbent core 50 within the pants 12. For purposes of the present invention, the asymmetry factor may be a value such as less than about 0.155. The asymmetry coefficient ranges from about 0 to about 0.155, preferably about 0 to about 0.12, and most preferably about 0 to about 0.1.
It is 10. In some designs, it may be desirable to apply an asymmetry factor in the range of about 0 to about 0.090.

In embodiments where there is no absorbent core 50 in the rear section 58, the asymmetry factor will be zero. Thus, for a disposable pant 12 having an absorbent core 50 that is longer in the front section 54 than in the rear section 58, the range of asymmetry disclosed in the present invention is from 0 to 0.
270. In the disposable pants 12 shown in FIGS. 10, 11 and 12, the range of the asymmetry factor is 0 to 0.270, preferably 0 to 0.20, most preferably 0.07 to 0.195.

Referring to FIGS. 10, 13 a and 14, in another embodiment, the length of the disposable pants 12 is 845 mm, the width is 715 mm at the end along line 9-9, and the minimum width is line 120 mm in the central section 56 along 8-8 and the length of MD is 438
In mm, the width of the CD has an absorbent core 50 that is 153 mm at the ends and 89 mm at the center of the legs 29 and 31 along line 8-8. Absorbent core 50 is disposed over aqueous liquid permeation barrier 48. The absorbent core 50 also has a pocket area 141 with a large basis weight, and the pocket area 141 is 279 mm long, 89 mm wide along the line 8-8, and 102 mm wide at the end.

Referring to FIGS. 13 a and 14, the absorbent core 50 has end regions 700 and 7.
01, 129 gsm (grams per square meter) of Dow 2035 superabsorbent material (
(Available from Dow Chemical Company, Midland, Michigan) and 215 gsm of Alliance CR1654 fluff pulp fiber. In the pocket area 141, the basis weight of the super absorbent material is 261 gsm, and the basis weight of the fluff pulp is 43.
5 gsm. The disposable pants 12 also have a carded web capture material 114, which is 330 mm long and 76 mm wide.
mm, basis weight 85 gsm and contains a mixture of 40% by weight of 6 denier polyester fiber from Hoechst Celanese and 60% crimped 3 denier seascore polyethylene / polypropylene fiber from Chisso, Japan. The capture material 114
It is disposed between the topsheet layer 49 and the absorbent core 50. Absorbent core 50
Has a holding capacity of about 500 grams of a 0.9% aqueous sodium chloride solution. It is important that the absorbent core 50 be disposed within the disposable pants 12 such that the front edge 55 of the absorbent core 50 is 163 mm from the front edge 103 of the disposable pants 12. Further, the front edge 720 of the pocket region 141 is located 222 mm from the front edge 103 of the disposable pants 12. Finally, the length is 279m
m, 85 gsm surge material (capture material) with a width of 64 mm (not shown)
Are arranged at the center of the width with the same length as the pocket region 141 and on the inner surface 65 of the absorbent core 50. The absorbent core 50 has a holding capacity of about 500 grams of a 0.9% aqueous sodium chloride solution. This results in 27.1% of the length of the absorbent core 50 being disposed in the front area 54 of the disposable pants 12 in the machine direction, and 8.7% of the length of the absorbent core 50 is disposable. In the rear area. The asymmetric coefficient of the absorbent core 50 is 0.095. Also, 21.5% of the length of the pocket area 141 is in the front area 54, 78.5% of the length of the pocket area 141 is in the center area 56, and 0.0% of the length of the pocket area 141 is Located in the rear area. The absorbent core 50 and the uptake material 114 are arranged along the central longitudinal axis AA of FIG. 11 symmetrically in the CD direction of the disposable pants 12. When placed on the wearer's body, in this configuration, a large percentage of the absorbent core 50 will be on the front side of the wearer, which is likely to be used.

The absorbent pad or core is placed symmetrically within the MD length of the disposable pants, as compared to those in which the absorbent pad or core is equidistant in the front and back areas of such a product. The above-described forwardly asymmetric configuration increases the utilization of the absorbent core 50 and prevents the unsightly and uncomfortable bulkiness of the rear area 58 of the disposable pants 12.

Referring to FIGS. 11, 13a, and 14, in yet another embodiment, the disposable pants 12 have a length of 845 mm, a width of 715 mm at the end along 9-9, and a minimum width of 915 mm. 120 mm in the central area 56 along the line 8-8 and the MD length is 48
It has an absorbent core 50 that is 9 mm and has a CD width of 153 mm at the ends and 89 mm at the center of the legs 29 and 31 along line 8-8. Absorbent core 50 is disposed over aqueous liquid impermeable barrier 48. The absorbent core 50 also has a pocket area 143 with a large basis weight, the pocket area 143 is 489 mm in length (total length of the absorbent core 50), the width is 89 mm along the line 8-8 and at the end. 102 mm.

Referring to FIGS. 13 b and 14, the absorbent core 50 has 114 gsm (grams per square meter) of Dow 2035 superabsorbent material (available from Dow Chemical Company, Midland, Michigan) in side edge regions 721 and 722. Available) and 232 gsm of Alliance CR1654 fluff pulp fiber. In the pocket region 143, the basis weight of the super absorbent material is 282 gsm, and the basis weight of fluff pulp is 591 gsm. The absorbent core 50 has a holding capacity of about 800 grams of a 0.9% aqueous sodium chloride solution. The absorbent core 50 is such that the front edge 55 of the absorbent core 50 is 112 mm from the front edge 103 of the disposable pants 12.
It is important that it be located within the disposable pants 12. Finally, the length is 279m
85 gsm surge material (capture material) with a width of 64 mm
Is positioned 187 mm from the front edge 103 of the disposable pants 12, located at the center of the width along the central longitudinal axis A-A, and disposed on the inner surface 65 of the absorbent core 50.

As a result, 34.7% of the length of the absorbent core 50 in the machine direction is reduced by 34.7%.
57.6% of the length of the absorbent core 50 is in the central area 56 of the disposable pants 12 and 7.7% of the length of the absorbent core 50 is disposed in the disposable pants 12 will be in the rear area 58. The asymmetric coefficient of the absorbent core 50 is 0.082. The absorbent core 50 and the uptake material 114 are symmetrically arranged in the CD direction of the disposable pants 12 along the central longitudinal axis AA. When placed on the wearer's body, this configuration will result in a greater proportion of the absorbent core 50 being on the front side of the wearer, which is likely to be utilized.

[0094] Absorbent pads or cores are symmetrically placed on the MD length of disposable pants, as compared to those in which the absorbent pads or cores are equidistant in the front and back areas of such products. The above-described forward asymmetric configuration increases the utilization of the absorbent core 50 and prevents the awkward and uncomfortable bulkiness of the rear area 58 of the disposable pants 12.

EXAMPLES Two absorbent disposable pant products were tested for leak-proof performance. 72 disposable incontinence testers (44 women and 28 men) use disposable pants under normal conditions
Sent to A diary sheet pre-filled with questions was attached to all individual products, and testers filled in information about the leak. All used products were returned and weighed to determine the amount of urine contained. From the combined data, a model that best fits the leak data was determined using a step-by-step procedure for logical regression. The purpose of the logic regression is to describe the relationship between the leak and the set of explanatory variables (code number, urine gram number, gender, activity, and size around the tester's waist).

The disposable pants products tested were the prototype disposable pants and Surecare® slip-on underwear manufactured by Inbrand of Marietta, Georgia. Slip-on products are conventional pants in which the absorbent core is symmetrically arranged on the product, the prototype disposable pants have a large asymmetric absorbent core in front and have a smaller volume than the Surecare product. The Surecare product is 660 mm long and has an essentially rectangular absorbent core 550 mm long and 127 mm wide. The absorbent core has 90 gsm superabsorbent material and 1062 gsm fluff pulp. The absorbent core is located 55 mm from the front and back edges of the garment.

The prototype disposable pants (see FIG. 10) have a product length of 781 mm. The absorbent core has a length of 400 mm, an end width of 165 mm and a central width of 90 mm. The absorbent core is located 160 mm from the front edge of the prototype disposable pants and 221 mm from the rear edge of the prototype pants. The absorbent core is 11
Contains 0 gsm superabsorbent material and 165 gsm fluff fiber. In addition, the prototype disposable pants have gauze, which is 292 mm long and 9 wide.
0 mm, 185 mm from the front edge of the prototype pants and 304 mm from the rear edge of the prototype pants, between the absorbent core and the liquid barrier. The gauze is composed of 180 gsm superabsorbent material and 270 gsm fluff pulp. The density of the absorbent core and gauze is about 0.160 gm / cc.

Further, the prototype disposable pants have a width of 64 mm and a length of 203 mm and have a length of 100 gs.
m of the uptake material. The front edge of the ingested material is 216 mm from the front edge of the prototype disposable pants and 362 mm from the rear edge of the prototype disposable pants. Table 5 shows the percentage of absorbent core and gauze in the front, middle, and rear areas of the prototype disposable pants. Table 5 shows the absorbent core of the prototype disposable pants,
The gauze and the uptake material are asymmetrical with respect to the front side of the prototype disposable pants, with a large proportion of the absorbent core on the front side, whereas in Surecare products the absorbent core is symmetrically arranged.

Table I Comparison of size between prototype disposable pants and Sure Care Slip-on In Table I, the SureCare product has no asymmetry factor because the absorbent core is symmetrically arranged. On the other hand, the asymmetric coefficient of the absorbent core of the prototype disposable pants is
0.111, indicating that the absorbent core is largely asymmetric in the forward direction.

The leak information in Table II is expressed in grams of urine absorption that causes 20% (LD20) and 50% (LD50) products to leak, with the prototype having an asymmetric absorbent core in the forward direction. Disposable trousers clearly demonstrate excellent leakage protection because of the high urine absorption required to leak 20% and 50% products. Table II Sure-care slip-on vs. leakage prevention function of prototype disposable pants

Although a detailed embodiment of the disposable pant 12 is shown in the figures, any disposable pant product may be arranged such that the product has an asymmetry factor of at least 0.27, and the absorbent core 50 is not required. It is to be understood that can be incorporated. Preferably, the thickness of the absorbent core 50 is less than about 45 mm. Absorbent core 5
Zero thickness may range from about 4 mm to about 40 mm. The thickness is preferably about 5
mm to about 30 mm, most preferably from about 6 mm to about 20 m.
m. Thickness was measured using a 3 inch (76 mm) diameter acrylic platen with a Mitutoyo Daigamatic indicator and an assembly that produces 0.05 psi pressure and a 4 inch (102 mm) flat, unclamped square sample (elastic). Body removal) is measured.

In constructing the absorbent barrier composite 46, the liquid barrier 48 is made to resist the permeation normally experienced while worn so that the liquid barrier 48 It is necessary to delay the movement of the liquid through it. The absorbent barrier composite 46 may be liquid impermeable by methods well known in the art, such as coating the absorbent core 50, or by securing a separate liquid impermeable material to the absorbent core 50.

The liquid barrier 48 has an outer surface 99 not facing the wearer and an inner surface 98 facing the wearer.
Having. Liquid barrier 48 may comprise a thin liquid impervious web or a sheet of plastic film such as polyethylene, polypropylene, polyvinyl chloride or similar material. Alternatively, the liquid barrier 48 may comprise a nonwoven fibrous web appropriately configured and arranged to have a low liquid permeability. Alternatively, or in addition, the liquid barrier 48 may comprise a layered or laminated material such as a heat bonded plastic film and nonwoven web composite. Alternatively, the liquid barrier 4
8 can also be composed of a liquid impermeable film or foam that is permeable to water vapor under normal wearing conditions. More preferably, the liquid barrier 48 has a water vapor transmission rate of A
According to STM E96-92, it is at least 1000 g / m ² / day. One example of a suitable film is a 39.4 gram / square meter porous film;
This film is manufactured by Mitsui and has the trade name Espore (registered trademark) N-TAF-CT
Sold by Consolidated Thermoplastics (CT).

The liquid barrier 48 desirably comprises a material that has been made or treated to be fluid impermeable. Alternatively, the liquid barrier 48 comprises a fluid permeable material and an absorbent barrier composite 46.
(Or absorbent core 50) may include other suitable means (not shown), such as a fluid impermeable layer, to which fluid from the absorbent barrier composite 46 (or absorbent core 50) is coupled. It can be provided to prevent movement. The liquid barrier 48 may have a single layer of material or a laminate of two or more layers of material. Suitable materials include a single spunbond layer, a two-layer spunbond and meltblown material, or a three-layer material spunbond-meltblown-spunbond material.

Suitable materials for liquid barrier 48 include thermoplastic films, wovens, nonwovens, film laminates, and / or nonwovens, foams, and the like. For example, the liquid barrier 48
Can comprise a thin, substantially fluid impermeable web or a plastic film sheet such as polyethylene, polypropylene, polyvinyl chloride, or similar material. One suitable material for the liquid barrier 48 is 0.028 millimeters (mm) thick with a regular matte embossed pattern, corona treated on both sides.
Polyethylene film.

The liquid barrier 48 must prevent the liquid from seeping into the outer garment when excreted in the absorbent barrier complex 46 of the pants 12. The liquid barrier 48 is located at least at the crotch 18 inside the outer cover 13 and is made of a liquid impermeable film such as polyethylene. The use of this film alone (without the outer cover 13) is hot and uncomfortable and may not be durable enough to withstand prolonged wearing time. The absorbent core 50 can also be coupled to the liquid barrier 48 with or without elastic features. The absorbent barrier composite 46 comprises a substantially fluid-impermeable liquid barrier 48, an outer cover 13
And a fluid (or liquid) permeable topsheet layer 49 overlaid on top. (See FIGS. 1 a, 8 and 9.) The absorbent core 50 is sandwiched between the liquid barrier 48 and the topsheet layer 49. (See FIGS. 1a, 8, and 9.) Preferably, the liquid barrier 48 and the topsheet layer 49 are longer and wider than the absorbent core 50. The topsheet layer 49 is designed to be placed on the side of the wearer and is referred to as the body-facing surface 16. Conversely, the liquid barrier 48 is designed to be located on the outer cover 13 and the outer garment side of the wearer and is referred to as the garment facing surface 23.

The topsheet layer 49 has an outer surface 109 not facing the wearer and an inner surface 108 facing the wearer. The topsheet layer 49 is constructed of a non-woven or other soft material suitable for contacting the wearer's skin. The topsheet layer 49 is formed of a soft, pliable, porous aqueous liquid permeable material, and aqueous liquid waste or semi-solid waste similarly passes through the absorbent core 50 and is exposed to the absorbent barrier composite 46 (or absorbent absorbent). Core 50). Suitable topsheet layers 49 include nonwoven webs, spunbonds composed of synthetic polymer filaments or fibers such as polypropylene, polyethylene, polyester, etc., meltblown or bonded carded webs, perforated films, reticulated foams, stretched plastic webbings. Including materials, scrim materials or webs such as wood, rayon or cotton or natural polymer filaments or fibers. The top sheet layer 49 has a pore diameter based on the air permeability of the material, which allows air, sweat, and evaporated substances to easily pass therethrough.

A non-woven spunbond is suitable for the topsheet layer 49. Such spunbond materials are available from Kimberly-Clark, Inc. of Roswell, Georgia. The topsheet layer 49 has a weight from 0.3 osy to about 2.0 osy, or about 0.5 osy. The topsheet layer 49 of the pants can be printed, colored, decoratively embossed, or have discontinuous slits or holes perforated all over. Further, the topsheet layer 49 can be treated with a surfactant to facilitate fluid transfer. In certain embodiments, the topsheet layer 49 has a basis weight of about 20 grams per square meter (g) having 50% polyethylene and 50% polypropylene.
sm) having a nonwoven, spunbond web of sea core bicomponent filaments. The fabric is surface treated with a surfactant commercially available from Union Carbide Chemical and Plastics Company of Danbury, Connecticut, USA under the trade name TRIRON X-102.

The width of the crotch portion 18 between the crotch elastic members 37 and 39 is such that the absorbent core 50 has the crotch elastic members 37 and 39, and finally the leg elastic members 32, 33, 34 and 35. It is necessary to be large enough to accommodate the absorbent core 50 between the side edges 17 and 19 of the crotch portion 18 so as not to hinder the absorption. As a result, the crotch elastic members 37 and 39 are contracted, and both sides of the crotch portion are pulled up to generate a bucket having the wall of the top sheet layer 49 and the liquid barrier 48. Furthermore, it can adapt to individuals of a wide range of sizes. However, in some product designs, the crotch elastic 37
And 39 may be covered by at least a part of the absorbent core 50. The width of the crotch 18 should not be too bulky or uncomfortable, and a suitable width should be at least about 2.5 inches (64 inches) between the crotch elastics 37 and 39.
mm). The width can be from about 2.5 inches (64 mm) to about 6.0 inches (152 mm).
mm). Typically, the crotch elastic bodies 37 and 39
Between about 3.5 inches (89 mm) to about 5 inches (127 mm).
mm). Preferably, the width so determined is about 4.25
Inches (108 mm).

The crotch 18 is at least about 0.25 inches (6 mm) from the width of the absorbent core 50
Wide. The crotch 18 is about 0.25 inches (6 mm) to about 4 inches (102 mm) wider than the absorbent core 50. Typically, crotch 18 is about 0.5 inches (13 mm) to about 3 inches (76 mm) wider than absorbent core 50, and more typically about 0.5 inches (13 mm) to about 0.5 inches (13 mm). 2 inches (51 mm) wide. Preferably, each crotch elastic 37 and 39 is from about 0.2 inches (5 mm) to about 0.5 inches.
Widths up to 8 inches (20 mm). More preferably, each crotch elastic 37 and 39 is from about 0.2 inches (5 mm) to about 0.4 (10 mm). The width of the entire crotch portion 18 includes the width between the crotch elastic members 37 and 39, the crotch elastic members 37 and 39, and the edges of the leg openings 28 and 30 outside the crotch elastic members 37 and 39. Includes the width of the raffle material to the part. In some embodiments according to the present invention, the absorbent core 50 comprises:
It can be about 0 inches (0 mm) to about 1 inch (25 mm) wider than the crotch 18.

Preferably, the raffle material at the edges of the leg openings 28 and 30 outside of the leg and crotch elastics 32, 33, 34, 35, 37, and 39 is about 0.5 inches (
13 mm). More preferably, the raffle material is about 0.125 inches (
3 mm). Most preferably, the raffle material is removed from the edges of the leg openings 28 and 29. The absorbent barrier composite 46 defines a width relative to the width of the crotch 18. Complex 4
The width of 6 is at least the width of the crotch 18 between the crotch elastic bodies 37 and 39. Preferably, the width is equal to the width of the crotch 18.

The overall length of the absorbent barrier composite 46 extends beyond the end of the absorbent core 50,
It must be suitable to prevent liquid seepage at these points when sleeping or sitting. This overall length should be at least 12 inches (305 m
m), it extends beyond the crotch 18 along the vertical center line AA of the pants 12. Alternatively, the length can be from about 12 inches (305 mm) to about 30 inches (762 mm).
mm) and more typically about 15 inches (381 mm) to about 23 inches (584 mm) wide. A common length range is from about 17 inches (432 mm) to about 21 inches (533 mm). Optionally, the length of the composite 46 is about 19 inches (483 mm).

The width of the absorbent barrier composite 46 extends beyond the crotch 18 and must be at least as wide as the crotch 18. The width of the absorbent barrier composite 46 may be reduced beyond the crotch 18 but may also reduce the ability to contain leaks. Typically,
The width of the absorbent barrier composite 46 is wider than the width of the crotch 18. The width of the absorbent barrier composite 46 extending beyond the crotch 18 may be from about 2.5 inches (64 mm) to about 12 inches (305 mm), or from about 4.0 inches (102 mm) to about 10 inches (
254 mm). The most common range is from about 7 inches (178 mm) to about 9
Inches (229 mm). Optionally, the width is about 8 inches (203 mm).

The present invention contemplates absorbent barrier composites 46 of various shapes. One preferred composite is a non-rectangular shape, such as an hourglass or an I-beam shaped absorbent barrier composite 46, which allows the seating of the finished pant 12 to be more flexible. Another preferred embodiment of the absorbent barrier composite 46 is a rectangle with rounded ends. The essentially rectangular absorbent barrier composite 46 (i.e., hourglass) is squared off at the end,
It is further preferable because the appearance of the rear side of the pants 12 can be flattened while comfortably fitting the contour of the body. Referring to FIGS. 1 a-c, 2 a-b, 3, and 6, the waist elastic 22 is shown covered by a body liner 80. Body liner 80 is constructed of a non-woven or other soft material suitable for contacting the wearer's skin. The body liner 80 is described in detail below. In another embodiment, at least a portion of the waist elastic 22 is covered with an absorbent barrier composite 46. Referring to FIGS. 3 and 4, the leg elastic body 32
, 33, 34, and 35 are shown covered by a body liner 80. In FIG. 1 b, the crotch elastics 37 and 39 are shown sandwiched between the topsheet layer 49 and the liquid barrier 48. Alternatively, in other embodiments, the crotch elastics 37 and 39 may be sandwiched between the outer cover 13 and the liquid barrier 48. Depending on the size and shape of the absorbent barrier composite 46, at least a portion of the leg elastics 32, 33, 34, and 35 may be covered by the absorbent barrier composite 46.

Referring to FIGS. 5 and 7, in another embodiment, the waist elastic portion 21 is shown covered with a waist liner 26. Further, the waist elastic body 21 may be covered with the body liner 80. Referring to FIGS. 5 and 7, the leg elastics 32 and 34 are
Shown covered by leg liner 38. Depending on the size and shape of the absorbent barrier composite 46, at least a portion of the leg elastics 32, 33, 34, and 35 may be covered by the absorbent barrier composite 46. In FIG. 1a, the crotch elastic bodies 37 and 39 are:
It is shown covered with an absorbent barrier composite 46 so as to be sandwiched between the outer cover 13 and the absorbent barrier composite 46. Referring to FIG. 7, the waist elastics 22 are shown covered with a body liner 80. The body liner 80 is constructed of a non-woven or other soft material suitable for contacting the wearer's skin. In other embodiments, at least a portion of the waist elastic 22 may be covered with an absorbent barrier composite 46.

[0116] The body liner 80 is compliant and soft to the wearer. Body liner 80 may be any sheet that is soft, flexible and porous, may be liquid permeable and may easily penetrate liquid through its thickness, or may be liquid impermeable and may penetrate liquid through its thickness. It may have resistance. Suitable body liners 80 may be made of a wide range of materials such as natural fibers (eg, wood or cotton fibers), synthetic fibers (eg, polyester or polypropylene fibers), and include natural and synthetic fibers or reticulated foam and perforations. It may be manufactured by a combination of plastic films.

There are a number of manufacturing techniques that can be used to manufacture body liner 80. For example, the body liner 80 may be a woven or nonwoven web or sheet, such as a spunbond, meltblown, or bonded carded web composed of synthetic polymer filaments, such as polypropylene, polyethylene, polyester, or the like, or rayon or cotton. Such natural polymer filament webs can be used. Bonded carded webs can be thermally bonded by means well known to textile manufacturers,
A binder can also be sprayed. A nonwoven spunbond is suitable for the body liner 80. Ideally, body liner 80 is a spunbond polypropylene nonwoven having a wire woven bond pattern. A suitable spunbond material is a spunbond material available from Kimberly-Clark, Inc. of Roswell, Georgia. The body liner 80 weighs from about 0.3 oz / square yard (osy) to about 2 oz.
. 0 osy, or about 0.6 osy. Pants body liner 80
Can be printed, colored or embossed decoratively. The body liner 80 has a pore size that allows the passage of air, sweat, and transpiration easily because the material is breathable. The body liner 80 can be selectively embossed or perforated with discontinuous slits or holes extending throughout the surface.

The location and shape of the leg openings 28 and 30 are to avoid cramping of the wearer's crotch and groin area, to properly cover the buttocks, and to allow the pants to lean forward, ie, the front waist edge It is important to prevent the portion from sagging downward with respect to the rear waist edge. FIG. 1a shows the most preferred design to fit the leg and cover the buttocks. The shape of the curve across the leading edges 72 and 74 of the leg openings 28 and 30 may affect the fit of the pants 12. If the curve is too deep, the pants 12 will shift downward and rearward, which will shorten the front waist and increase the length of the rear, causing the seating of the pants to sag. This causes the pants 12 to appear slanted when worn, as indicated by the rise and fall around the wearer's waist, and cramp along the front ends 72 and 74 of the leg openings 28 and 30. The comfort fit will be reduced.

The structure of the leg openings 28 and 30 is important for the pants 12 to function properly. When the pants 12 are laid flat as in FIG. 1a, the majority (at least 51%) of the rear edges 76 and 78 of the rear sections 82 and 84 of the leg openings 28 and 30 respectively form a substantially straight line. Is preferred. More preferably, the leg openings 28 and 3
At the trailing edges 76 and 78 of the rear sections 82 and 84, the length □, which is at least about 70% of the total length of the rear sections 82 and 84, is substantially straight. Leg opening 2
The straight sections □ of the rear edges 76 and 78 of the rear sections 82 and 84 of 8 and 30 must form an acute angle with the vertical centerline AA of the pants 12. Preferably, the line □
Is between the center line AA of the pants 12 and about 45 □ and about 89 □, more preferably about 5 □.
An angle between 5 and about 87, and most preferably between about 81 and about 76.
To form The shallow curves (curves with a radius of at least 6 inches) correspond to the leg openings 28 and 3
If the trailing edges 76 and 78 of the trailing zones 83 and 84 are defined, two points are selected along the curve, one point is located about 25% of the length of the curve, and One point is located approximately 75% of the length of the curve. Using the straight line drawn between the two points, the square angle formed with the center line AA of the pants 12 is measured. As disclosed, the trailing edges 76 and 78, which form an acute angle with the longitudinal centerline, reduce the bias and offset of the absorbent core 50 during use, and provide a comfortable and comfortable fit to the body. Such an angle helps the pant 12 to undercut the buttocks, improving fit and reducing leakage. The leg elastics 34 and 35 are connected to the rear edge 7.
It will be appreciated that references to trailing edges 78 and 76 may be interpreted as describing leg elastics 34 and 35 because of their proximity to 8 and 76, respectively.

The majority (at least 51%) of the front edges 72 and 74 of the front sections 86 and 88 of the leg openings 28 and 30 have a length □ and are preferably straight, and more preferably the front The length of the edges 72 and 74 (□ of the leg openings 28 and 30) is
And 30 are substantially straight at least 70% of the length of the front sections 86 and 88. The substantially straight sections □ of the front edges 72 and 74 of the front sections of the leg openings 28 and 30 have an angle □ with the centerline of the pants 12 of between about 62 □ and about 99 □, preferably about It should be between 74 □ and about 91 □, most preferably about 85 □. The leading edges 72 and 74, which are at an angle to the centerline as disclosed, reduce the bias and offset of the absorbent core 50 during use to provide a comfortable and comfortable fit to the body. The shallow curves (with a radius of at least 6 inches) correspond to the leg openings 28 and 30.
If the front edges 72 and 74 of the front sections 86 and 88 are defined, two points are selected along the curve, one point is located about 25% of the length of the curve, and the other The point is located at about 75% of the length of the curve. Using the straight line drawn between the two points, the square angle formed with the center line AA of the pants 12 is measured. A 90 ° angled leading edge 72 and 74 may be used, but angles at least slightly larger or smaller than 90 □ result in pants 12 that fit comfortably when moving. The leg elastics 32 and 33 are close to the front edges 72 and 74, respectively, so that the front edges 72 and 7
It will be understood that reference to 4 may be construed as describing leg elastics 32 and 33.

Similarly, the shape of the crotch curve is also important. Most of the side edges 17 and 19 of the crotch 18 have a length □ and are preferably curved (bowed). If the curves are too shallow or straight (especially at the ends of the crotch 37 and 39), the inner groin will feel cramped and the pants 12 will not fit the contours of the wearer's legs, so between the pants and the body A gap is created,
Leaks will occur. Also, a preferred narrow width crotch having a shallow curve may reduce burrow coverage. To compensate for such a decrease, the rear area 82
And 84, the rear leg edges 76 and 78 are preferably modified downwardly to increase the angle. The curve between the side edges 17 and 19 of the crotch 18 and the rear sections 82 and 84 of the leg openings 28 and 30 should start slightly forward of the midline BB of the pants 12. See FIG. 1a. This allows the rear leg elastics 34 and 35 to be positioned below the lower edge of the buttocks, helping to prevent the pants 12 from slipping during walking. This means that the curved crotch □ of the leg openings 28 and 30 is completely ahead of the center line BB of the pants 12. Crotch elastic body 3
It will be understood that 7 and 39 may be construed as describing leg elastics 37 and 39 when referring to edges 17 and 19 due to their proximity to edges 17 and 19. There will be.

The leg elastics 32, 33, 34, and 35 can be designed to be moved away from the absorbent core 50 and along the edge of the crotch 18 outside the absorbent core 50, The absorbent core 50 does not significantly interfere with the function of the leg elastics 32, 33, 34, and 35 and provides an excellent gasket around the leg openings 28 and 30. Further, when the absorbent core expands by absorbing external excrement, the leg elastic member 3 arranged in this manner is expanded.
2, 33, 34, and 35 can further conform to the body of the wearer.

In a preferred embodiment, the waist and leg elastics 22, 32, 33, 34,
And 35 are the outer cover 13 and the body liner by means well known in the art, including ultrasonic bonding, heat / pressure bonding or adhesive bonding, respectively (and also in embodiments including waist elastics 21). Pants 12 in a state of being totally stretched sandwiched between
Attached to. The crotch elastics 37 and 39 are sandwiched between the liquid barrier 48 and the topsheet layer 49 of the absorbent barrier composite 46. The crotch elastics 37 and 39 are typically mounted in an extended state by means well known in the art, including ultrasonic bonding, heat / pressure bonding or adhesive bonding. Suitable materials for the elastic include, but are not limited to, elastic strands, yarn rubber, flat rubber, elastic tape, film-type rubber, polyurethane and elastomer, tape-like elastomer or foam polyurethane or molding Elastic or inelastic scrim. A suitable material is sold by DuPont, Wilmington, Del., Under the name LYCRA®. Each elastic body may be a single, multi-part, or composite structure before being integrated into pants 12.

In another embodiment, the waist, leg section, and crotch elastics 22, 32, 33, 34
, 35, 37, and 39 are each sandwiched between outer cover 13 and body liner 80 (and in embodiments including waist elastic 21) by ultrasonic bonding, heat / pressure bonding or bonding. It is attached to the pants 12 in a fully extended state by means well known in the art, such as an agent bond. Suitable materials for the elastic include, but are not limited to, elastic strands, yarn rubber, flat rubber, elastic tape, film-type rubber, polyurethane and elastomer, tape-like elastomer or foam polyurethane or molding Elastic or inelastic scrim. A suitable material is sold by DuPont, Wilmington, Del., Under the name LYCRA®. Each elastic body may be a single, multi-part, or composite structure.

The width of the front and rear body portions 14 and 15 having the waist elastic body 22 is about 1
From inches (25 mm) to about 10 inches (254 mm) (perpendicular to AA shown in FIG. 1a). Typically, the width of the portion of the front and rear body portions 14 and 15 having the waist elastics 22 is from about 3 inches (76 mm) to about 8 inches (20 mm).
3 mm). More typically, the width is from about 6 inches (152 mm) to about 7.
It is in the range of 5 inches (191 mm). In some embodiments, it is desirable to vary the width of the waist elastic 22 between the front and rear body portions 14 and 15. Main unit 14
And 15 has the narrower portion of the waist elastic 22, the width is
It ranges from about 1 inch (25 mm) to about 8 inches (203 mm), typically from about 4 inches (102 mm) to about 5.5 inches (140 mm). Waist elastic body 2
2 Elongated from about 100% to about 400%, typically from about 150% to about 30%
It is stretched 0%, most typically from about 200% to about 275%. The pants 12 can be configured such that the tension of the waist elastic body 22 in the front body 14 is different from the tension of the waist elastic body 22 of the rear body 15.

[0126] The waist elastics 22 can include threads, strands, ribbons, bands, films, elastic nonwovens, or composites. The threads, strands, ribbons, or bands may be multi-piece and may be applied as a composite. The number of elastic material parts constituting the waist elastic body 22 is about 1 to about 100, typically about 10 to about 4
0, and most typically ranges from about 15 to about 35. Preferably, when the waist elastic body 22 is a thread, 15 to 40 threads are used as the waist elastic body 22.
Used, the threads may be from about 0.0625 inches (1.6 mm) to about 2 inches (51 mm), more preferably from about 0.0625 inches (1.6 mm) to about 0.5 inches (13 mm), and most Preferably about 0.25 inches (6 mm)
Are placed at intervals. Placing the elastic material such as a thread on the waist elastic body 22 densely and flatly improves the appearance of the pants 12, but may vary the distance between the elastic material parts. Using such variants for the front and rear waist edges 44 and 45, the appearance of a waist band is obtained.

In a preferred embodiment, the elastic thread is made of a suitable elastomeric material. One suitable material is spandex, such as LYCRA® thread available from DuPont, Wilmington, Delaware. Suitable waist elastics 22 are from 100 to 1200, typically from about 470 to about 940, and most typically from about 620 to about Includes threads with up to about 740 decitex (g / 10,000 m). Adhesive 71 is typically applied in a meltblown or swirl pattern using currently known techniques to bond waist elastic 22 to outer cover 13 and body liner 80. Preferably, the adhesive 71 is applied only to the waist elastic body 22. A suitable adhesive is, for example, Findlay H2096 available from Atfindlay Adhesives of Milwaukee, Wisconsin.
Contains hot melt adhesive.

In the embodiment including the waist elastic body 21, the width of the waist elastic body 21 is about 0.06.
From 25 inches (1.6 mm) to about 2 inches (51 mm). Typically, the front and rear waist edges 4 of the front and rear body portions 14 and 15 each having a waist elastic body 21 are provided.
The width of 4 and 45 ranges from about 0.25 inches (6 mm) to about 1.5 inches (38 mm).
). More typically, the width is from about 0.5 inches (13 mm) to about 1 inch (
25 mm). The waist elastic 21 extends from about 150% to about 300%, typically from about 175% to about 275%, and most typically about 200%.
From about 250%.

The waist elastic 21 may include a thread, a strand, a ribbon, a film, an elastic nonwoven or a composite. Threads, strands, ribbons, or bands
It may be multi-part or applied as a composite. The number of parts of elastic material that make up the waist elastic 21 may be from about 1 to about 20, typically about 2 to about 10, more typically about 2 to about 8, and most typically about 2 To about 6. Preferably, if the waist elastic 21 is a thread, three to six threads are used as the waist elastic 21 and the thread can be from about 0.0625 inches (1.6 mm) to about 1.5 inches (38 mm), and even more. Preferably it is spaced from about 0.0625 inches (1.6 mm) to about 0.25 inches (6 mm) and most preferably about 0.125 inches (3 mm).

[0130] The thread can be made of a suitable elastomeric material. One suitable material is LYCRA (available from DuPont, Wilmington, Del.)
(Registered trademark) thread. For a waist elastic 21 that includes about 5 to about 10 threads, a suitable waist elastic 21 is 100 to 1200
, Typically from about 470 to about 940, and most typically from about 620 to about 940 decitex (g / 10,000 m). The adhesive 71 is typically applied in a meltblown or spiral pattern using currently known techniques, and is applied to the outer cover 13 and the body liner 80 or the waist liner 26 using the waist elastic 2.
Combine 1 Preferably, the adhesive 71 is applied only to the waist elastic body 21. Suitable adhesives include, for example, Findlay H2096 hot melt adhesive available from Atfindlay Adhesives of Milwaukee, Wisconsin.

The width of the leg elastics 32, 33, 34, and 35 is about 0.0625 inches (1.
6 mm) to about 1 inch (25 mm), typically about 0.25 inch (6 mm)
From about 1 inch (25 mm), and most typically about 0.25 inch (6 mm)
From about 0.75 inches (18 mm). The leg elastics 32, 33, 34, and 35 extend from about 100% to about 300%, typically from about 175% to about 275.
% Elongation, most typically from about 200% to about 250% elongation. The leg elastics 32, 33, 34, and 35 include threads, strands, bands,
It may include a ribbon, film, elastic nonwoven or composite. The threads, strands, ribbons, or bands may be multi-part and applied as a composite. The number of parts of the elastic material that make up the leg elastics 32, 33, 34, and 35 ranges from about 1 to about 6, typically about 2 to about 5, and most typically about 3 to about 4 Range. Preferably, when the leg elastics 32, 33, 34, and 35 are threads, 1 to 6 threads are used as the leg elastics 32, 33, 34, and 35, and the thread has about 0.0625. Inches (1.6 mm) to about 0.5 inches (1
3 mm), more preferably from about 0.0625 inches (1.6 mm) to about 0.25 inches.
Inches (6 mm) and most preferably about 0.125 inches (3 mm).

The thread may be made of a suitable elastomeric material. One suitable material is spandex, such as LYCRA® thread available from DuPont, Wilmington, Delaware. Suitable leg elastics 32, 33
, 34, and 35 include leg elastics 32, 33, 3, including about 3 to about 6 threads.
4 and 35, from about 470 to about 1200, typically from about 620 to about 1
000, most typically from about 740 to about 940 decitex (g / 10000 m
). The adhesive 71 is typically applied in a meltblown or swirl pattern using currently known techniques, using an outer cover 13 and
The leg elastic 32 may be attached to the body liner 80, the absorbent barrier composite 46, or the leg liner 38.
, 33, 34, and 35 are combined. Preferably, the adhesive 71 is used for the leg elastic body 3.
Applies only to 2, 33, 34, and 35. Suitable adhesives include, for example, Findlay H2096 hot melt adhesive available from Atfindlay Adhesives of Milwaukee, Wisconsin.

The width of the crotch elastics 37 and 39 ranges from about 0.0625 inches (1.6 mm) to about 1 inch (25 mm), typically from about 0.25 inches (6 mm) to about 1 inch (25 mm). ), And most typically from about 0.25 inches (6 mm) to about 0.75 inches.
Inches (18 mm), for example about 0.5 inches (13 mm). Crotch elastic body 3
7 and 39 are used at about 100% to about 300% stretch, typically about 150% to about 275% stretch, and most typically about 200% to about 250% stretch.

The crotch elastics 37 and 39 may include threads, strands, ribbons, bands, films, elastic nonwovens or composites. The threads, strands, ribbons, or bands may be multi-part and applied as a composite. Crotch elastic body 3
The number of parts of the resilient material comprising 7 and 39 ranges from about 1 to about 6, typically from about 2 to about 5, and most typically from about 3 to about 4. Preferably, when the crotch elastics 37 and 39 are threads, one to six threads are used as the crotch elastics 37 and 39, and the threads can be from about 0.0625 inches (1.6 mm) to about 0.4 mm. 5 inches (13 mm), more preferably about 0.0625 inches (1.6 mm)
) To about 0.25 inch (6 mm) and most preferably about 0.125 inch (3 mm).
mm).

[0135] The threads can be made of a suitable elastomeric material. One suitable material is spandex, such as LYCRA® thread available from DuPont, Wilmington, Delaware. Suitable crotch elastics 37 and 3
9 corresponds to about 47 to crotch elastics 37 and 39 including about 3 to about 6 threads.
0 to about 1200, typically about 620 to about 1000, most typically about 74
Includes threads with 0 to about 940 decitex (g / 10,000 m). The adhesive 71 is typically applied in a meltblown or swirl pattern using techniques now well known in the art, and is applied to the outer cover 13 and the absorbent barrier composite 46 or leg liner 38 to the crotch elastic. 37 and 39 are combined. Preferably, the adhesive 71 is
Applies only to crotch elastics 37 and 39. Suitable adhesives include, for example, Findlay H2096 hot melt adhesive available from Atfindlay Adhesives, Inc. of Milwaukee, Wisconsin.

In one embodiment, a comfortable fit around the leg openings 28 and 30 is provided.
To raise the sides of the crotch 18 to form a cradle structure around the absorbent core 50, the leg elastics 32, 33, 34, and 35 are about 200% to about 250%.
Stretched and applied to the outer cover. The crotch elastics 37 and 39 are stretched about 200% and sandwiched between the liquid barrier 48 and the topsheet layer 49. When the elastic body is applied, the front leg elastic bodies 32 and 33 and the rear leg elastic bodies 34 and 35 are preferably extended to different degrees and applied to the outer cover 13. In one embodiment, the front leg elastics 32 and 33 are rear leg elastics 34 and 35.
Stretched less.

In another embodiment where a comfortable fit is obtained around the leg openings 28 and 30 and the side of the crotch 18 is raised to form a cradle structure around the absorbent core 50, a leg elastic The bodies 32, 33, 34, and 35 and the crotch elastics 37 and 39 are approximately 2
It is stretched from about 00% to about 250% and applied to the outer cover 13. When applying an elastic body, it is preferable that the front leg elastic bodies 32 and 33 and the rear leg elastic bodies 34 and 35 are extended to different degrees and applied to the outer cover 13. In one embodiment, the front leg elastics 32 and 33 are extended less than the rear leg elastics 34 and 35.

Elastic body of three segments (elastic body of three segments includes front leg elastic body 3
2 and 33, the rear leg elastics 34 and 35, and the crotch elastics 37 and 39) surround the leg openings 28 and 30, respectively, in the embodiment where the front leg elastics 32 and 33 and The crotch elastic members 37 and 39 extend less than the rear leg elastic members 34 and 35. Preferably, the front leg elastics 32 and 33 and the crotch elastics 37 and 39 are stretched about 200%, and the rear leg elastics 34 and 35 are stretched about 250%. The three-segment elastic system and the different tensions provide an excellent fit, the groin is less cramped, and the crotch 18 bias caused by a high degree of elastic contraction of the legs can be reduced. The rear leg elastics 34 and 35 are highly stretched, preventing the seating of the pants 12 from shifting with movement during use and biasing the absorbent core 50 causing leakage of the pants 12 and an uncomfortable fit. Helps to prevent from happening.

In the embodiment in which the elastic body of the three segments surrounds the leg openings 28 and 30, respectively, as shown in FIG. 1a (the configuration having such a crotch elastic body 39 and the leg elastic bodies 32 and 35) ), The working parts of the crotch elastic bodies 37 and 39 may overlap the working parts of the leg elastic bodies 32, 33, 34 and 35. The action portions of the crotch and leg elastic bodies 32, 33, 34, 35, 37, and 39 (also the waist elastic bodies 21 and the waist elastic bodies 22) are parts of the elastic bodies that exert a contractive force on the article 10. Is defined as

FIG. 1 a shows another configuration in which three segments of elastics surround the leg openings 28 and 30, respectively, in which the working part of the crotch elastic 37 is replaced by the leg elastics 34. , But does not overlap with the action part of the leg elastic body 33. As a result, a gap 107 is formed in the elastic body surrounding the leg opening 30 of the front body 14. The size of the gap 107 ranges from about 3 inches (76 mm) to about 0.125.
Inches (3 mm), typically from about 2 inches (51 mm) to about 0.25 inches (
6 mm) and most typically from about 1 inch (25 mm) to about 0.5 inch (13 mm).
mm). The gap 107 provides a more comfortable fit to the pant 12 and tightens or may be caused by the leg elastics 32 and 33 and the crotch elastics 37 and 39 when used with a particular body type and physique and activity. Rubbing can be reduced. Further, the lower front body portion 42 becomes flat, and the pants 12 that can be used more freely are obtained.

FIG. 1 b shows another configuration in which the elastic body of the three segments surrounds the leg openings 28 and 30, respectively, in which the working part of the crotch elastic body 39 is replaced by the leg elastic body 32. , But does not overlap with the working portion of the leg elastic body 35. As a result, a gap 111 is formed in the elastic body surrounding the leg opening 28 of the rear body part 15. The size of the gap 111 ranges from about 3 inches (76 mm) to about 0.125.
Inches (3 mm), typically from about 2 inches (51 mm) to about 0.25 inches (
6 mm) and most typically from about 1 inch (25 mm) to about 0.5 inch (13 mm).
mm). The gap 111 provides a more comfortable fit to the pant 12 and tightens or may be caused by the leg elastics 34 and 35 and the crotch elastics 37 and 39 when used with a particular body type and physique and activity. Rubbing can be reduced. Further, the lower rear body 43 becomes flat, and the pants 12 that can be used more freely are obtained.

FIG. 1 b shows another configuration in which the elastic body of the three segments surrounds the leg openings 28 and 30, respectively, in which the working part of the crotch elastic body 37 is replaced by the leg elastic body 33. And 34 do not overlap. As a result, a gap 1 is formed in the elastic body surrounding the leg openings 28 and 30 of the front and rear body portions 14 and 15, respectively.
07 and 111 are formed. The size of each of the gaps 107 and 111 is about 3
Inches (76 mm) to about 0.125 inches (3 mm), typically about 2 inches (51 mm) to about 0.25 inches (6 mm) and most typically about 1 inch (
25 mm) to about 0.5 inches (13 mm). The gaps 107 and 111 give the pants 12 a more comfortable fit,
When used with a particular body type and size and activity, the tightening or rubbing that may be caused by the leg elastics 32, 33, 34, and 35 and the crotch elastics 37 and 39 can be reduced. Further, the lower rear body 43 becomes flat, and the pants 12 that can be used more freely are obtained.

The two segment elastics surround the leg openings 28 and 30 (the two segment elastics include the front leg elastics 32 and 33 and the rear leg elastics 34 and 35). (See FIG. 2a) In an embodiment, the front leg elastics 32 and 33 extend less than the rear leg elastics 34 and 35. Front leg elastic bodies 32 and 33
Preferably, the rear leg elastics 34 and 35 are extended approximately 250%. The two-segment elastic system and the different tensions provide an excellent fit, the groin is less cramped, and the crotch 18 bunching caused by a high degree of elastic contraction of the legs can be reduced. The rear leg elastics 34 and 35 are highly stretched, preventing the seating of the pants 12 from shifting with movement during use and biasing the absorbent core 50 causing leakage and uncomfortable fit of the pants 12. Helps to prevent from happening.

FIG. 1 c shows another configuration in which the elastic body of the two segments surrounds the leg openings 28 and 30, in which the working part of the leg elastic body 32 is of the leg elastic body 35. Does not overlap the working part. As a result, the leg openings 28 are located above the leg openings 28 of the front body portion 14, the rear body portion 15, or both the front and rear body portions 14 and 15.
A gap 107 is formed in the elastic body surrounding the. The size of the gap 107 is about 3 inches (
76 mm) to about 0.125 inch (3 mm), typically about 2 inches (51 m
m) to about 0.25 inch (6 mm) and most typically about 1 inch (25 mm).
) To about 0.5 inches (13 mm). The gap 107 provides a more comfortable fit to the pants 12 and reduces tightening or rubbing that may be caused by the leg elastics 32, 33, 34, and 35 when used with a particular body type and build and activity. can do. Further, due to the gap 107,
Since the “panty line” disappears at the upper part of the wearer's leg, the pants 12 that can be used more freely can be obtained.

As shown in FIG. 2a (such a configuration is shown in leg elastic 32 and leg elastic 35), in an embodiment where two segments of elastic surround the leg openings 28 and 30. The working portions of the leg elastic members 32 and 33 may overlap the working portions of the leg elastic members 34 and 35. FIG. 2 a shows another configuration in which the elastic body of the two segments surrounds the leg openings 28 and 30, in which the working part of the leg elastic body 33 becomes the working part of the leg elastic body 34. Do not overlap. As a result, a gap 113 is formed in the elastic body surrounding the leg opening 30 of the front body 14. The size of the gap 113 is about 3 inches (76 m
m) to about 0.125 inches (3 mm), typically about 2 inches (51 mm) to about 0.25 inches (6 mm) and most typically about 1 inch (25 mm) to about 0.5 inches ( 13 mm). The gap 113 provides a more comfortable fit to the pants 12 and reduces tightening or rubbing that can be caused by the leg elastics 32, 33, 34, and 35 when used with a particular body type and build and activity. can do.

FIG. 2 a shows another configuration in which two segments of elastics surround the leg openings 28 and 30, respectively, in which the active part of the leg elastics 32 is replaced by leg elastics 35. Does not overlap with the working part of As a result, the front body portion 14 and the rear body 1
5, or a gap 113 is formed in the elastic body surrounding the leg opening 28 in both the front and rear body portions 14 and 15. The size of the gap 113 ranges from about 3 inches (76 mm) to about 0.125 inches (3 mm), typically from about 2 inches (51 mm) to about 0.5 mm.
25 inches (6 mm) and most typically from about 1 inch (25 mm) to about 0.5
It can be in the range of inches (13 mm). The gap 113 provides a more comfortable fit to the pants 12 and reduces tightening or rubbing that may be caused by the leg elastics 32, 33, 34, and 35 when used with a particular body type and physique and activity. can do. Further, since the "panty line" disappears at the upper part of the wearer's leg due to the gap 113, the pants 12 that can be used more freely can be obtained.

In one embodiment, one segment of the elastic surrounds leg openings 28 and 30 (one segment of elastic includes leg elastics 96 and 98) (see FIG. 3). Elastics 96 and 98 are elongated from about 100% to about 300%, typically from about 175% to about 275%, and most typically from about 200% to about 250%.
Preferably it is elongated.

The waist elastics 22 surrounding the edges of the main bodies 14 and 15 of the pants 12 act separately and adapt to various shapes and sizes. As a result, a smooth, comfortable and comfortable fit is obtained within a predetermined hip size range. Waist elastic body 2
In the embodiment having 1, the waist elastic body 21 has a higher degree of elongation, a denser arrangement, and a larger cross-sectional area than the waist elastic body 22, so that the pants 12 have a rounded shape. Fits a wide range of waists, at the waist to hip ratio encountered. The degree of elongation of the waist elastic body 22 can be different between the front and rear body portions 14 and 15. Preferably, in the front body 14, the waist elastics are spaced apart from the front leg elastics 32 and 33. The waist elastic body 22 of the rear main body 15 is arranged at a distance from the rear leg elastic bodies 34 and 35. Waist elastic body 22 and leg elastic bodies 32, 3
The distance between 3, 34, and 35 ranges from about 0.125 inches (3 mm) to about 3
Inches (76 mm), typically from about 0.25 inches (6 mm) to about 2 inches (
51 mm) and more typically from about 0.25 inches (6 mm) to about 1.5 inches (38 mm). The spacing between the front body portions 14 and 15 need not be the same size. However, the waist elastic body 22 of either or both of the front and rear body portions may be adjacent to the front or rear leg elastic bodies 32, 33, 34, and 35, respectively. In the embodiment in which the waist elastic body 21 is present, the waist elastic body 22 is preferably arranged at a distance from the waist elastic body 21 and the leg elastic bodies 32, 33, 34, and 35.

However, the waist elastic body 22 of one or both of the front and rear body portions may be adjacent to one or both of the front and rear leg elastic bodies 32, 33, 34, and 35. Often, in this case, the waist elastics 22 are leg elastics 32, 33, 34, and 35.
Adjacent to at least a portion of Pants 12 sized to comfortably fit the hips ranging from about 36 inches (914 mm) to about 45 inches (1143 mm).
In the embodiment, the width of the waist elastic body 22 is about 4 inches (102 mm) in the front body section 14 and about 6.25 inches (159 mm) in the rear body section 15. Waist elastic body 22
Can be spaced from about 0.0625 inches (1.6 mm) to about 0.5 inches (13 mm). Preferably, the waist elastics 22 are about 0.06
They are spaced from 25 inches (1.6 mm) to about 0.25 inches (6 mm). Most preferably, the waist elastics 22 are spaced about 0.125 inches (3 mm) apart. The absorbent barrier composite 46 extending toward the waist opening 20 to the front and / or rear body portions 14 and 15 fits into the wearer's body by the force of the waist elastic 22.
From the lower front and lower rear body portions 42 and 43 to the upper front and upper rear body portion 40
To 41 in this manner.

In the embodiment having the waist elastic body 21, the waist elastic body 21 is
And 41 have higher tension / width units than the waist elastics 22 to provide a comfortable waist fit over a range of waist to hip ratios for various body types. In a preferred embodiment, the waist elastic 21 is equal to the tension of the waist elastic 22,
A smooth fit is formed around the waist opening 20 while transitioning smoothly from the upper body portions 40 and 41 to the front and rear waist edges 44 and 45. However, the waist elastic body 2
The tension of the 1 and waist elastics 22 and the LYCRA® count can be different.

The front and rear body portions 14 and 15 may have leg liners 38, waist liners 26, and / or topsheet layers 49 spread out to cover the inside of the body portions 14 and 15. . In another embodiment, the leg liner 38, the waist liner 26,
And / or the topsheet layer 49 may not include a central crotch 18 that is covered using an absorbent barrier composite 46. Absorbable barrier composite 46
In the body portions 14 and 15 that overlap the liner 80, the composite 46 is applied over any existing liner 80 to bring it into contact with the wearer. However, the overlapping portion of the absorbent barrier composite 46 may be sandwiched between the outer cover 13 and the body liner 80.

With respect to the embodiment having the waist elastic body 22, the leg elastic bodies 32, 33, 34, and 35 and the crotch elastic bodies 37 and 39, the elastic bodies 22, 32, 33, 34, 35, 3
The range of tensions for 7 and 39 are shown in Table III below. Table III

With respect to the embodiment having the waist elastic body 21, the waist elastic body 22, the leg elastic body 3
The tension ranges for 2, 33, 34, 35, 37, and 39 are shown in Table IV below. Table IV The waist elastic body 21, the waist elastic body 22, the crotch elastic bodies 37 and 39, and the leg elastic bodies 32, 33, 34, and 35 were measured as follows. 10mm in width and 51 in length
Samples of elastic bodies 21, 22, 32, 33, 34, and 35 having a size of mm were tested. The tensions shown in Tables III and IV are in grams / width 10 mm. If the size of the sample tested is different from the width 10 mm, the value is the width 10
mm must be the standard. The tension is measured during the first rolling extension at 100% extension at room temperature and humidity.

The side seams 64 and 70 may be made inside or outside the pant 12 and are formed flat with respect to the pant 12 to enhance the completeness of the pant's appearance and provide the side seam 64
And 70 may not be visible through clothing. Optionally, the side edges 60, 62, 66 and 68 of the front and rear body portions do not overlap, but are made flat and extend laterally. The width of the side seams 64 and 70 should be minimal, while still providing sufficient strength to be raised and lowered many times without avoiding or tearing during wear times of 24 hours or more. Proper side seams and seals
U.S. Pat. No. 4,610,681 to Strahbean et al., Sep. 9, 1986, Feb. 10, 1987, Heran.
No. 4,641,381, issued Mar. 3, and U.S. Pat. No. 4,646,362 issued Mar. 3, 1987 to Helan et al. These disclosures are incorporated herein by reference. Further, the side seams 64 and 70 can be re-attachable. Various means for securing the disposable pants 12 around the wearer include mechanical fasteners. This includes buttons and buttonholes, snaps, buckles, hooks, hooks and loops, end extensions, tabs that are designed or arranged to connect or engage a particular type of supplementary device or garment outer cover. , Adhesive tapes and the like. In addition, an elastic fastener can be used to ensure a good fit on the disposable pants 12.

The side seams 64 and 70 of the outer cover 13 are each sealed by means well known in the art such as ultrasonic bonding, stitching heat / pressure bonding or adhesive bonding.
The maximum seam strength that can be achieved depends on the materials used, the bond pattern, the bond width, and the dwell time, capacity, and pressure process settings. A suitable side bond is typically
Ultrasonic bonding is used to achieve seam strength such that the side seams 64 and 70 do not tear or open during use.

[0156] The side seams 64 and 70 may have a non-joining portion outside the joining area to soften the ends of each of the side seams 64 and 70. The width of the unbonded portion is from about 0 to about 13 mm, preferably from about 1 to about 6 mm, and most preferably from about 2 to about 3 mm.
mm. Alternatively, the seam width (bonded area plus unbonded area) may be less than about 0.6 inches (15 mm). If the seam is trimmed or cut off close to the outer edge of the joint, sharp edges will form along the edge of the seam, which can catch on clothing or irritate the wearer's skin there is a possibility. Thus, while the present invention has been described in detail, it will be readily understood that various changes and modifications can be made without departing from the spirit of the invention. All such changes and modifications are intended to be included within the scope of the present invention as defined by the appended claims.

[Brief description of the drawings]

FIG. 1a is a plan view of a disposable pants article according to the present invention in a planar configuration before assembly.

FIG. 1b is a plan view of a disposable pants article according to the present invention in a planar configuration before assembly.

FIG. 1c is a plan view of a disposable pants article according to the present invention in a planar configuration before assembly.

FIG. 2a is a plan view of a disposable pants article according to the present invention in a planar configuration before assembly.

FIG. 2b is a plan view of the disposable pants article according to the present invention in a planar configuration before assembly.

FIG. 3 is a plan view of a disposable pants article according to the present invention in a planar configuration before assembly.

FIG. 4 is a perspective view of an adult disposable pants according to the present invention.

FIG. 5 is a perspective view of an adult disposable pants according to the present invention.

FIG. 6 is a cross-sectional view showing an outer cover, a liner (top sheet layer), and an elastic body taken along line 6-6 in FIG. 1A.

FIG. 7 is a cross-sectional view showing the outer cover, the liner (top sheet layer), and the elastic body, taken along line 6-6 in FIG. 2A.

FIG. 8 is an exploded cross-sectional view showing the outer cover, the liner (top sheet layer), and the elastic body, taken along line 4-4 in FIG. 1A.

FIG. 9 is an exploded sectional view showing the outer cover, the liner (top sheet layer) and the elastic body, taken along line 4-4 in FIG. 2a.

FIG. 10 is an enlarged plan view of the disposable pants article according to the present invention in a planar configuration before assembly.
Figure 4 shows an arrangement in which the absorbent pad is asymmetrical forward.

FIG. 11 is an enlarged plan view of the disposable pants article according to the present invention in a planar configuration before assembly.
Figure 4 shows an arrangement in which the absorbent pad is asymmetrical forward.

FIG. 12 is an enlarged plan view of the disposable pants article according to the present invention in a planar configuration before assembly.
Figure 3 shows an arrangement in which the absorbent pad is asymmetrical forward.

FIG. 13a is a cross-sectional view of the absorbent pad showing a uniform distribution of fibers and superabsorbent material, taken along line 4-4 of FIG. 1a.

13b is a cross-sectional view of the absorbent pad showing a uniform distribution of fibers and superabsorbent material with a lateral basis weight distribution along line 4-4 in FIG. 1b.

FIG. 14 is a cross-sectional view of the absorbent pad showing a uniform distribution of fibers and superabsorbent material along line AA of FIG. 1a.

FIG. 15a is a cross-sectional view of the absorbent pad showing the layered distribution of fibers and superabsorbent material, taken along line 4-4 of FIG. 1a.

FIG. 15b is a cross-sectional view of the absorbent pad showing the pulsed distribution of fibers and superabsorbent material along the line AA of FIG. 1a with little superabsorbent material at the ends.

FIG. 15c is a cross-sectional view of the absorbent pad showing a non-uniform distribution of fibers and superabsorbent material in a lateral direction of the absorbent pad, taken along line 4-4 of FIG. 1a.

──────────────────────────────────────────────────続 き Continuation of front page (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE ), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR , BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS , JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZA, ZW (72) Inventor Fel Joseph Patrick 54915 Appleton, Wisconsin United States of America Westown Court W 3180 (72) Inventor Fletcher Amy Lynn 54915 Appleton North Woodridge Drive, Wisconsin United States of America 4300 (72) Inventor Freeburger Sarah Jane Mary United States Wisconsin 54130 Corner House Wellhouse Drive 2708 F-term (reference) 3B029 BA04 BA05 BA18 BD13 4C098 AA09 CC02 CC12 CC28 CE05 DD10 DD22 DD 25 DD26 DD30

Claims (19)

[Claims] 1. A disposable pant having an initial deployed shape having a longitudinal axis and a lateral axis, a front section, and a rear section, wherein the front section and the rear section are above the vertical axis. And a central area is disposed between the front and rear areas, and each of the areas is along the longitudinal axis of one third of the length of the pants. Disposable pants having a length, a) having a front body portion and a rear body portion connected by a crotch portion, wherein the front body portion and the rear body portion are connected to each other to form a waist opening; An outer cover forming a leg opening; and b) a liquid-impermeable layer, a permeable layer, and a front edge disposed between the liquid-impermeable layer and the permeable layer, at least coupled within the crotch. A substantially rectangular absorbent core with a rear edge Wherein the length of the absorbent core in the rear section divided by the length of the absorbent core in the front section and the central section is less than 0.155; and Disposable pants, wherein the absorbent core is disposed in the area where the length of the absorbent core in the front area is larger than the length of the absorbent core in the rear area. 2. The disposable pants according to claim 1, wherein the front body further includes a front waist edge, and the rear body further includes a rear waist edge. 3. The outer cover includes leg elastics disposed around each of the leg openings to form gathers around each of the leg openings, and the front body and the rear side. The disposable pants according to claim 1, further comprising a waist elastic body disposed around the front body portion and the rear body portion to form a gather with the body portion. 4. The outer cover includes leg elastics disposed around each of the leg openings to form a gather around each of the leg openings, and the front body and the rear side. The disposable pants according to claim 2, further comprising a waist elastic body disposed around the front body portion and the rear body portion to form a gather with the body portion. 5. The front edge of the absorbent core is about 7 inches from the front waist opening.
3. The absorbent core of claim 2, wherein the rear edge of the absorbent core is disposed about 4 inches to about 10 inches from the waist opening. The disposable pants described in. 6. The disposable pants according to claim 5, wherein the absorbent core is arranged symmetrically with respect to the longitudinal axis. 7. The disposable pants according to claim 6, wherein the absorbent core is arranged symmetrically with respect to the longitudinal axis. 8. The disposable pants according to claim 1, wherein the length of the absorbent core is from about 15 inches to about 21 inches. 9. The disposable pant of claim 2, wherein said absorbent core has a length of about 15 to about 21 inches. 10. The outer cover of claim 1, wherein the outer cover further comprises a waist elastic disposed about the waist opening to form a gather around the waist opening. Disposable pants. 11. The outer cover according to claim 2, wherein the outer cover further comprises a waist elastic disposed around the waist opening to form a gather around the waist opening. Disposable pants. 12. A disposable pant having an initial deployed shape having a longitudinal axis and a lateral axis, a front section, and a rear section, wherein the front section and the rear section are above the vertical axis. And a central area is disposed between the front and rear areas, and each of the areas is along the longitudinal axis of one third of the length of the pants. Disposable pants having a length, a) having a front body portion and a rear body portion connected by a crotch portion, wherein the front body portion and the rear body portion are connected to each other to form a waist opening; An outer cover forming a leg opening; and b) a liquid-impermeable layer, a permeable layer, and a front edge disposed between the liquid-impermeable layer and the permeable layer, at least coupled within the crotch. A substantially rectangular absorbent core having a rear edge C) said outer cover comprising leg elastics disposed around each leg opening to form gathers around said leg openings, and said front body portion; A waist elastic body disposed around the front body portion and the rear body portion to form a gather with the rear body portion; and a length of the absorbent core in the front region and the central region. The length of the absorbent core in the rear section divided by the length is less than 0.155, and the length of the absorbent core in the front section is larger than the length of the absorbent core in the rear section. Disposable pants, wherein the absorbent core is arranged in an area. 13. The disposable pants according to claim 12, wherein the front body further includes a front waist edge, and the rear body further includes a rear waist edge. 14. A front edge of the absorbent core is located about 7 inches to about 3 inches from the front waist opening, and a rear edge of the absorbent core is disposed on the waist. 14. The disposable pant of claim 13, wherein the pants are disposed about 4 inches to about 10 inches from the opening. 15. The disposable pants according to claim 12, wherein the absorbent core is arranged symmetrically with respect to the longitudinal axis. 16. The disposable pant of claim 12, wherein the length of the absorbent core is from about 15 inches to about 21 inches. 17. The disposable pant of claim 13, wherein said absorbent core has a length of about 15 to about 21 inches. 18. The outer cover according to claim 12, wherein the outer cover further comprises a waist elastic disposed around the waist opening to form a gather around the waist opening. Disposable pants. 19. The outer cover of claim 13, wherein the outer cover further comprises a waist elastic disposed about the waist opening to form a gather around the waist opening. Disposable pants.