RU2575433C2 - Absorbent article with gathered belt ribbon and leg cuff - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: disposable absorbent article comprising a first waist region, a second waist region, a crotch region located between the first waist region and the second waist region; a first waist edge and a second waist edge; a first longitudinal edge and a second longitudinal edge; at that the absorbent article comprises a belt ribbon and a leg sealing system, at that the belt ribbon has a first number of folds of gathering, and the leg sealing system has a second number of folds of gathering, so that the ratio of the first number of folds of gathering to the second number of folds of gathering is 0.75 to 1.25.

EFFECT: improved fitting of the article on the body and reduction of likelihood of leaks.

8 cl, 13 dwg

Description

Application area

The present invention relates to absorbent articles, such as diapers, having an improved waistband, so that the product may have a view closer to that of the garment. The proposed product may be more functional and more intuitive to use.

State of the art

Most diapers offered for sale today have waistbands (or tensile waistbands), obtained by bonding a laminate of nonwoven materials and elastic threads to the base with a certain amount of tension. Elastic threads are used as the most cost-effective material, which practically does not lose its elasticity over time. Nonwovens are preferred for use on the outside of the waistband because they are breathable and softer to the touch than films. With some technologies for applying waistbands in the manufacturing process, the elastic element is stretched, applied across the length of the product and secured between the layer of material facing the body and the layer of material facing the clothing.

In other technological processes, a laminate is first made of elastic threads and non-woven material, and then imposed in a reduced state across the length of the product on the side facing the body, so that the only material between the elastic elements and the surface of the body in the region of the waistband is non-woven material. It is known that the reduction of the waist belt around the waist improves the feeling of fitting the product on the body, due to the fact that the gaps in the back of the diaper are closed, and in addition, closing these gaps increases the absorbent capacity of the product and reduces the likelihood of leaks (both in fact and subjectively user perception). It is also known that if the strands of elastic material are joined in a stretched state with another, usually not extensible material, then after the reduction of the resulting laminate, an assembly is formed, the wave-like folds of which are repeated with a certain frequency, and the density of the obtained material will be higher than the sum of the densities of the starting materials measured when they are flattened. Since waistbands or stretch elements are embedded in the product, being fully stretched, and when donning the product they are also quite strongly stretched around the wearer's waist, their density after landing on the waist will be close to the density of the starting materials. Therefore, there is a need to improve the design of waist bands and leg cuffs, which would improve the fit of the product on the body and reduce the likelihood of leaks.

SUMMARY OF THE INVENTION

The present invention relates to a disposable absorbent article comprising: a first waist region, a second waist region, a crotch region located between the first waist region and the second waist region; a first waistband and a second waistband; a first longitudinal edge and a second longitudinal edge; wherein the absorbent article comprises at least one waist belt.

In one embodiment, the waistband comprises a laminate comprising a nonwoven fabric and at least one elastic thread, wherein the nonwoven fabric and the elastic thread are fastened to each other during the first stretching, and the waistband is attached to the disposable absorbent article during fastening stretching of the waistband, in as a result, the total combined constriction of the waist ribbon is more than about 95%, and / or the combined contraction of the waist ribbon in the extended state is more than about 35%.

In one embodiment, the disposable absorbent article comprises a first waistband located in close proximity to the first waistband and a second waistband located in close proximity to the second waistband, and wherein the difference in contractions of the front and rear parts of the base portion is more than approximately 9.0%.

In one embodiment, the disposable absorbent article comprises a foot sealing system, the waist belt having a first number of assembly folds and the foot sealing system having a second number of assembly folds, and wherein the ratio of the first number of assembly folds to the second number of assembly folds is from about 0, 75 to about 1.25.

Brief Description of the Drawings

FIG. 1. An embodiment of an absorbent article flattened.

FIG. 2. A view of a laminate webbing ribbon that can be used in one embodiment of the present invention.

FIG. 3. A view of an absorbent article in one embodiment of the present invention.

FIG. 4. A schematic section of a tucked leg cuff in one embodiment of the present invention.

FIG. 5. A schematic sectional view of a tucked leg cuff in another embodiment of the present invention.

FIG. 6. Schematic section of an absorbent core in one embodiment of the present invention.

FIG. 7. Schematic section of an absorbent core in yet another embodiment of the present invention.

FIG. 8. A schematic sectional view of an absorbent core in yet another embodiment of the present invention.

FIG. 9a to 9d. Schematic cross-sections of laminated waistbands in various embodiments of the present invention.

FIG. 10. Schematic representation of the frame for measurements.

DETAILED DESCRIPTION OF THE INVENTION

In the context of the present description, the following terms have the following meanings.

The term “disposable”, as used in relation to absorbent articles, means that these absorbent articles are not generally intended to be washed or otherwise reconstituted for reuse as absorbent articles (that is, they are intended to be discarded after their first use and, preferably recycled, composted or otherwise disposed of in an environmentally friendly manner).

The term “absorbent article” means devices that absorb and retain body excretions, and in particular, devices that are installed on or near the wearer's body and are designed to absorb and retain various body excretions. Examples of absorbent articles include diapers, training panties, diapers-panties (diapers having molded waist and leg openings as described, for example, in US Pat. No. 6,120,487), multiple fastening diapers, absorbent underwear for urinary incontinence inserts and holders for them, feminine hygiene products, such as absorbent pads, panty liners for every day and the like.

The terms “proximal” and “distal” mean respectively the location of an element relatively close or relatively far from the longitudinal or lateral center line of any structural element (for example, the proximal edge of a longitudinally extended element is closer to the longitudinal center line than the distal edge of the same the element itself is located with respect to the same longitudinal center line).

The terms “facing the body” and “facing the clothes” are used respectively to indicate the relative location of an element, the surface of an element, or a group of elements. “Facing the body” means that the element or its surface is closer to the wearer while wearing the product than some other element or some other surface. “Clothing facing” means that the item or its surface is farther away from the wearer when wearing it than some other item or some other surface (that is, this item or this surface is closer to the clothing that the user can wear over disposable absorbent product).

The term “longitudinal” means a direction extended from one waist edge to the opposite waist edge, essentially perpendicular to both of them and generally parallel to the direction along which the absorbent article has a maximum linear dimension. Directions within 45 ° of the longitudinal direction thus defined are also considered “longitudinal”. The term "lateral" means a direction extended from one longitudinal edge to the opposite longitudinal edge as a whole at right angles to the longitudinal direction. Directions within 45 ° of the lateral direction defined in this way are also considered “lateral”.

The term "located" is used in relation to an element located in a particular place or position.

The term “attached” means configurations in which one element is directly attached to another element, as well as configurations in which one element is indirectly attached to another element, by attaching the first element to one or more intermediate elements, which in turn are attached to the second element.

The term “film” means a sheet material whose length and width are significantly greater than its thickness. Typically, films have a thickness of about 0.5 mm or less.

The terms “permeable” and “waterproof” are used to denote the permeability of materials in the context of their use in disposable absorbent products. In particular, the term “water-permeable” is used to refer to a layer or multilayer structure having pores, holes or interconnected empty spaces due to which water (in a liquid state), urine or artificial substitute for urine can pass through the entire thickness of the layer or structure without applying pressure to them. Conversely, the term “waterproof” is used to refer to a layer or multilayer structure through which water (in a liquid state), urine or artificial urine substitute cannot pass without applying pressure to them (with the exception of pressure caused by naturally acting forces such such as gravity). In this case, a layer or a multilayer structure in accordance with the present definition may be permeable to water vapor (vapor permeable).

The terms “extensibility” and “extensible” mean that the length or width of the component to which they refer can be increased compared to its length or width in the initial state.

The term "elasticized" means that the component contains at least a portion made of an elastic material.

The terms “extendible material”, “stretchable material” or stretchable material ”are used as mutually replacing each other and mean material which, when applied to it, can be stretched to a length of at least 110% of its original length ( there, which can be stretched by 10% or more of the original length), without breaking or breaking, and after removing the tensile force slightly returns to the original length, namely, less than about 20% of the elongation, and also pre endures rupture or fracture (in accordance with the method of measuring the extensibility of EDANA 20.2-89). In the event that the material, after it is elongated and the tensile force is removed, returns to the original length by at least 40% of the elongation value, such a tensile material is considered “elastic” or “elastomeric”. For example, an elastic material having an initial length of 100 mm can be stretched to a length of at least 150 mm, and after removing the tensile force, it will be reduced to a length of at least 130 mm (i.e., reduced by 40% of the elongation). In the event that the material after removal of the tensile force returns to the original length by less than 40% of the elongation, such tensile material is considered to be "essentially inelastic" or "essentially inelastomeric". So, for example, a tensile material having an initial length of 100 mm can be stretched to a length of at least 150 mm, and after removing the tensile force it will be reduced to a length of at least 145 mm (no more than 10% of the elongation).

The term "elastomeric material" means a material with elasticity. Elastomeric materials may include elastomeric films, nets, non-woven materials and other sheet materials and structures.

The term “diaper pants” means disposable absorbent articles having preformed openings for the waist and legs. Panty diapers can be worn by threading the wearer's legs into the leg openings and pulling them to a position around the bottom of the wearer's body. Panty diapers are sometimes referred to as closed diapers, pre-fastened diapers and training panties.

In FIG. 1 shows a view of a non-limiting embodiment of an absorbent article 20 in accordance with the present invention in a flat, not reduced condition (i.e., in the absence of contracting forces exerted on it by elastic elements). The garment-facing surface 120 of the absorbent article 20 faces the viewer. The absorbent article 20 includes a longitudinal center line 100 and a lateral center line 110. The absorbent article 20 may comprise a base portion 22. As shown in the figure, the absorbent article 20 and its base portion 22 may have a first waist region 36, a second waist region 38 located opposite the first waist region 36, and the crotch region 37 located between the first waist region 36 and the second waist region 38. The waist regions 36 and 38 contain those parts of the absorbent article 20 that when worn whirling waist of the wearer. The waist regions 36 and 38 may contain elastic elements that, when gathered around the user's waist, provide a better fit of the product and its capacity function to retain body excreta. The waist regions 36 and 38 may include a first waistband 1000 and a second waistband 2000. The crotch region 37 is that part of the absorbent article 20 that, when worn by the absorbent article 20, is located between the legs of the wearer.

The outer perimeter of the base portion 22 is formed by longitudinal edges 12 and lateral edges 14. The longitudinal edges 12 include a front longitudinal edge 12a in the first waist region 36 and a rear longitudinal edge 12b in the rear waist region 38. The base portion 22 may have opposite longitudinal edges 12 oriented in generally parallel to the longitudinal center line 100. However, for a better fit of the product, the longitudinal edges 12 can be curved or angled with the longitudinal axis, so that the diaper, flattened to a flat state, can It has the shape of an hourglass. The base portion 22 may have opposing lateral edges 14 oriented generally parallel to the lateral center line 110.

The base portion 22 may comprise a liquid-permeable topsheet 24, a backsheet 26 and an absorbent core 28 located between the topsheet 24 and the backsheet 26. The absorbent core 28 may have a surface facing the body and a surface facing the garment. The top sheet 24 may be attached to the absorbent core 28 and / or to the back sheet 26. The back sheet 26 may be attached to the absorbent core 28 and / or top sheet 24. It is also understood that between the absorbent core 28 and the top sheet 24 and / or other structures, elements or materials may be located on the back sheet 26. In some embodiments, the base portion 22 is the basis for the structure of the absorbent article 20 to which other elements of the absorbent article can be attached, which will thus have a composite structure. Although many configurations are known in which the topsheet 24, the backsheet 26 and the absorbent core 28 can be assembled together, the most preferred diaper configurations are described in US Pat. 5,151,092; 5,221,274; 5,551,445; 5,569,234; 5580411 and 6004306.

The top sheet 24 is part of the absorbent article 20, which is located at least in partial contact or in close proximity to the user's body. The topsheet 24 can be made from a wide variety of suitable materials, such as porous foams, mesh foams, perforated polymer films, woven or non-woven fabrics made from natural fibers (e.g., wood or cotton), synthetic fibers (e.g., polyester or polypropylene), or from combinations of natural and synthetic fibers. The top sheet 24 is typically made of a flexible, soft-touch and non-irritating material. Typically, at least a portion of the topsheet 24 is liquid permeable and allows fluid to pass quickly through the entire thickness of the topsheet 24. Tops 24 may include holes. An example of a suitable material for top sheet 24 is BBA Fiberweb material (Brentwood, Tennessee, USA), manufacturer part number 055SLPV09U.

Any part of the top sheet 24 may be coated with a lotion or other skin care product known to those skilled in the art. Examples of suitable lotions include those described in US Pat. Nos. 5,607,760; 5609587, 5635191 and 5643588. The top sheet 24 can be fully or partially elasticized, or can be pulled so that an empty space forms between the top sheet 24 and the absorbent core 28. Examples of structures including elasticized or tied upper sheets are described in more detail in US patents 4892536; 4,990,147; 5037416 and 5269775.

The absorbent core 28 may contain various absorbent materials traditionally used for the manufacture of diapers and other absorbent articles. Examples of suitable absorbent materials include ground wood pulp (commonly referred to as creped cellulose packing), meltblown polymers, including co-formed; cellulose fibers, with stiffness, chemically enhanced, modified or cross-linked; fabrics, including fabric twists and laminates; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials or any other known absorbent materials and combinations thereof. In various embodiments, at least a portion of the absorbent core is substantially cellulose-free and contains less than 10% cellulosic fibers by weight, less than 5% cellulosic fibers, less than 1% cellulosic fibers, may contain a materially insignificant amount of cellulose fiber or no cellulosic fiber at all. Moreover, by a “materially insignificant” amount of cellulosic material is meant an amount of cellulosic material that does not significantly affect at least one of the following properties of the absorbent core: its thickness, flexibility and absorbing properties. You can also expect that if some part of the absorbent core is essentially cellulose-free, this gives additional advantages, for example, less thickness, greater flexibility and increased absorbent capacity of this part of the absorbent core, essentially free of cellulose. In particular, if some part of the absorbent core does not essentially contain cellulose, then it has a significantly smaller thickness and much greater flexibility than a similar part of the absorbent core, including cellulose fibers in an amount of more than 10% by weight. The amount of absorbent material, for example, particulate absorbent polymer material present in the absorbent core, may be different, and in various embodiments, it may be more than about 80% by weight of the weight of the absorbent core, or more than about 85% by weight weight by weight of the absorbent core, or more than about 90% by weight of the weight of the absorbent core, or more than about 95% by weight of the weight of the absorbent core. Non-limiting examples of suitable absorbent cores will be described in more detail below.

Examples of absorbent structures that can be used as absorbent core 28 are described in US Pat. Nos. 4,610,678; 4,673,402; 4,834,735; 4,888,231; 5,137,537; 5,147,345; 5,342,338; 5,260,345; 5,387,207; 5397316 and 5625222.

The back sheet 26 is generally arranged so that it can form at least a portion of the garment-facing surface 120 of the absorbent article 20. The back sheet 26 may have a structure that prevents contamination by body excretions absorbed and held by the absorbent article 20, of objects that may come into contact with an absorbent article 20, in particular bed linens and underwear. In some embodiments, the back sheet 26 is substantially waterproof. Suitable back sheet materials include, for example, films from Tredegar Industries Inc. (Ter-Ot, Indiana, USA) offered under the trade names X15306, X10962 and X10964. Other suitable backsheet materials may include “breathable” materials that allow fumes to escape from the absorbent article 20 without passing fluid from the body through the backsheet 26. Examples of “breathable” materials include materials such as non-woven webs and microporous films, such as, for example, the production of Mitsui Toatsu Co. (Japan) offered under the trade name ESPOIR NO and manufactured by EXXON Chemical Co. (Bay City, TX) offered under the trade name EXXAIRE. Suitable "breathable" composite materials containing polymer blends are available from Clopay Corporation (Cincinnati, Ohio) under the trade name HYTREL, blend P18-3097. Such "breathable" composite materials are described in detail in patent application WO 95/16746 and in US patent 5865823. Other suitable "breathable" back sheets containing non-woven materials and perforated molded films are described in US patent 5571096. An example of a suitable back sheet is also described in US Pat. No. 6,107,537. Other suitable materials and / or technologies for the manufacture of back sheet 26 may also be used, including but not limited to surface treatment, special selection and processing of film, special selection and processing fiber weave and others.

The back sheet 26 may also contain more than one layer. The back sheet 26 may include an outer cover layer and an inner layer. The outer cover layer may be made of soft non-woven material. The inner layer may be made of an essentially waterproof film. The outer coating layer and the inner layer may be bonded to each other using adhesive or other suitable material, or in another suitable manner. A particularly suitable material for the outer coating layer is material with the catalog number A18AH0 manufactured by Corovin GmbH (Germany), and a particularly suitable material for the inner layer is the material with the catalog number PGBR4WPR made by RKW Gronau GmbH (Germany). Since the present invention provides for a wide variety of configurations of the back sheet, one skilled in the art will understand that such changes and modifications are possible without departing from the ideas and principles of the present invention.

The absorbent article 20 may include front ears 40 and / or rear ears 42. The ears 40, 42 may be extensible, inextensible, elastic or inelastic. The ears 40, 42 can be formed from non-woven fabrics, woven fabrics, knitted fabrics, polymer and elastomeric films, perforated films, sponges, foams, nets, combinations thereof and laminates. In some embodiments, the tabs 40, 42 may be formed of a stretch laminate, for example, a nonwoven fabric / elastomeric material or a nonwoven fabric / elastomeric / nonwoven fabric. Stretchable laminates can be made by any method known to those skilled in the art. So, for example, the ears 40, 42 can be formed from a stretch laminate without tension, which includes at least a layer of nonwoven material and an elastomeric element. The elastomeric element is attached to the layer of nonwoven material, being in an unstretched or essentially unstretched state, and the resulting laminate is made expandable (or more extensible) due to a special activation process of the laminate, in which the layer of nonwoven material is irreversibly extended and the elastomeric element is temporarily extended. The nonwoven layer can be structurally integral with at least a portion of the base portion 22, and in this case, the elastomeric element can be attached to the nonwoven layer, after which the nonwoven / elastomeric laminate can be activated. Alternatively, the nonwoven layer may be a separate component from the base portion, in which case the elastomeric element is attached to the nonwoven layer to form a laminate, which is then attached to the base portion. If one or more layers of the side panel (eyelet) are made separately, the laminate can be activated before or after they are attached to the base. The tension-free activation process is further described in US Pat. Nos. 5,167,897 and 5,167,793. The elastic eye can also be an activated laminate containing an elastomeric film (for example, manufactured by Tredegar Corp — Richmond, Virginia, USA, catalog number X25007) located between two nonwoven layers ( e.g. BBA Fiberweb (Brentwood, Tennessee, USA), FPN332 Part Number).

The ears 40, 42 can be made in one piece or separately from the base part. The eye, which is carried out separately, is subsequently attached to the base part 22. The eye, made in one piece with the base part, is a part of the base part 22, which protrudes in the lateral direction outward from the longitudinal bar 12. The eye, made in one piece, can be made for by trimming the base material in a shape such that it will include tabs in the shape of ears.

The absorbent article 20 may also include a mounting system 50. When fastened, the fastening system 50 couples the first waist region 36 and the second waist region 38 to each other, thereby forming a waist circumference that surrounds the waist of the wearer while wearing the absorbent article 20. The fastening system 50 may include fastening elements, such as pieces ribbons, Velcro components, mutually fastening tabs of ribbons and grooves, buckles, buttons, buttons and / or hybrid connectors. Many other well-known fasteners are also suitable. Some suitable fastening systems are described in US Pat. Nos. 3,848,594; 4,662,875; 4,846,815; 4,894,060; 4,946,527; 5151092 and 5221274. A suitable fastening system of mutually fastening elements is described in US Pat. No. 6,432,098. The fastening system 50 may also include means for bringing the product into a position in which it is convenient to throw it away, as described in US Pat. No. 4,963,140. The fastening system 50 may also include a primary and a secondary attachment system, as described in US Pat. No. 4,699,622. The attachment system 50 may have a structure that prevents mutual displacement of the overlapping parts of the article to better fit onto the body, as described in US Pat. No. 5,242,436; 5,499,978; 5507736 and 5591152.

The waistband absorbent articles of the present invention can provide enhanced wearing comfort, improved fit on the body, and less chance of leaks. A certain type of waistband can provide increased product strength and wear resistance.

One of the objectives of the present invention is to provide improved closure of the gap in the first and / or second waist regions of the absorbent product compared to products in accordance with the prior art. Better closure of gaps in the waist regions allows you to get a product that has a better fit and less prone to leaks. One way to achieve better closure of the gaps is to make a waistband having a common edge with the rear lateral edge of the absorbent article. However, due to some features of the process of putting on the product, in some embodiments, the waistband may be present both in the first waistband region and in the second waistband absorbent article. The fact is that although it is desirable to provide a tighter waistband in the back waist region, it may be advisable to have a less stretched ribbon in the front waist region to facilitate donning. Therefore, in one embodiment, a “differential reduction” of the waistband laminate is provided, for example, the same laminate can be used, but with different elongation of the elastic threads of which the front and back waistbands are made, or due to the fact that the laminate is trimmed only one of the waist bands. Trimming the laminated waistband ribbon is done after applying the waistband ribbon to the product; while the waistband is applied so that it is extended through the trim zone of the entire product. Due to this, the same laminate can provide a different degree of contraction in the front region and the rear region, namely, a stronger contraction in the rear region, which contributes to better closure of the gap, and weaker contraction in the front.

In one embodiment, the first waistband (1000) and the second waistband (2000) comprise a laminate (3000) of waistbands. In one embodiment, the waistband laminate comprises a nonwoven fabric (3100). In one embodiment, the webbing laminate comprises a film. In one embodiment, the webbing laminate comprises at least two elastic strands (3200), at least four elastic strands, at least six elastic strands, at least eight elastic strands, at least ten elastic strands, or at least twelve elastic threads.

In one embodiment, the first waistband and the second waistband are applied to the product with the same mounting tension applied to them. In one embodiment, the first waistband and the second waistband are applied to a disposable absorbent article with a stretch greater than about 30%, greater than about 50%, or greater than about 70% of the length in the original state. In one embodiment, the first waistband and the second waistband are applied to a disposable absorbent article with a stretch of not more than about 150%, not more than about 125%, not more than about 100%, or not more than about 75% of the length of the ribbon in its original state. In one embodiment, the first waistband and the second waistband are applied to a disposable absorbent article with a stretch of from about 70% to about 75% of the length of the ribbon in its original state.

In one embodiment, the waistband laminate comprises a nonwoven fabric and at least two elastic threads, the threads being made of various elastic materials. In one embodiment, the elastic yarns have different diameters or different cross-sectional geometry.

In one embodiment, the laminate of the waistbands is cut after being applied to the absorbent article such that the cut extends between the elastic threads. So, for example, from a laminate of waistbands, containing at least two elastic threads, we obtain two waistbands, each of which contains one elastic thread; from the laminate of the waist ribbons containing at least four elastic threads, two waist ribbons are obtained, each of which contains two elastic threads. As shown in FIG. 2, from the laminate (3000) of the waist ribbons containing at least six elastic threads, after the cut (along line 4000), two waist ribbons (1000, 2000) are obtained, each of which contains three elastic threads. Similarly, from the laminate of the waistbands, containing at least eight elastic threads, we obtain two waistbands, each of which contains four elastic threads, from the laminate of the waistbands containing at least ten elastic threads, we obtain two waistbands, each of which contains five elastic threads, from the laminate of the waist ribbons containing at least twelve elastic threads, two waist ribbons are obtained, each of which contains six elastic threads. In one embodiment, the laminate of the waistbands is cut so that in the resulting two waistbands the number of elastic threads will not be the same, or there will be no elastic threads at all on one side of the cut. So, for example, a laminate of waistbands, containing ten elastic threads, can be cut into two waistbands, one of which will contain six waistbands, and the other will contain four waistbands. In another embodiment, from the laminate of the waistbands, after cutting it, one waistband containing ten elastic threads and one waistband that does not contain elastic elements can be obtained. In one of the embodiments of the laminate to obtain two waist ribbons cut in the center. In another embodiment, the laminate is cut off-center to obtain two waist ribbons. In one embodiment, the waistband laminate may comprise elastic strands spaced at equal distances from each other. In one embodiment, the waistband laminate may comprise individual elastic threads located closer to each other or further apart from each other compared to other threads.

In one embodiment, the waistband has a dimension in a direction parallel to the longitudinal axis of the article of more than about 12 mm, more than about 15 mm, or more than about 20 mm. In one embodiment, the waistband has a dimension in a direction parallel to the longitudinal axis of the article that is less than about 50 mm, less than about 45 mm, or less than about 40 mm.

In one embodiment, the waistband in the initial state of the article has a dimension in a direction parallel to the lateral axis of the article, comprising more than about 50 mm, more than about 75 mm, or more than about 100 mm. In one embodiment, the waistband in the initial state of the article has a dimension in a direction parallel to the lateral axis of the article that is less than about 300 mm, less than about 250 mm, or less than about 200 mm.

In one embodiment, the ratio of the waistband size in the direction transverse to the machine (CD) to the distance from one tape to another tape is less than about 2, or less than about 1.5, or about 1.

In one embodiment, the waistband is located on the surface of the product facing the body. In another embodiment, the waistband is located on the surface of the article facing the garment. In one embodiment, the waistband is located between the layers of the absorbent article. In one embodiment, there may be a waist belt located on the side facing the garment, on any waist regions: first or second, and a waist ribbon located on the side facing the body, on any waist regions: the first or second. In one embodiment, there is a waistband located on the side facing the body, and a waistband located on the side facing the garment. In one embodiment, the waistband is located on a surface facing the body or on the surface facing the garment, and an imitation of the waistband is printed on the side not containing the waistband.

In one embodiment, the distance from the edge of one tape to the edge of another tape is at least about 50% of the average circumference of the child’s waist (the “average” child for which diapers of this size are intended); at least about 60% of the average waist circumference, or at least about 65% of the average waist circumference.

In one embodiment, the elastic strands of the same laminate of the waistbands can have different elongation, as a result of which, after cutting the laminate, a first waistband having a first elongation and a second waistband having a second elongation can be obtained, while when attaching the ribbons to the product, the same mounting tension may be applied to them. In this case, the preliminary elongation corresponds to the stretching at which there is an elastic thread with respect to the second material with which it joins into the laminate (which can be, for example, a non-woven fabric with a low density). So, for example, if an elastic thread is stretched from a length of 100 mm to a length of 250 mm, we can say that the preliminary elongation is 150% ((250 mm / 100 mm) -1) × 100%. After removing the tensile forces, the laminate will return to its original state, almost to a length of 100 mm, but the length of the non-woven fabric will still remain equal to 250 mm. In the same laminate of the waistbands, there may be elastic threads with varying degrees of stretching. So, for example, the thread (1) can be stretched from a size of 100 mm to 250 mm when connected to a nonwoven fabric, that is, it will have a preliminary elongation of 150%, while the thread (2) can be stretched from 90 mm to 250 mm when connecting it to a non-woven fabric, that is, it will have a preliminary elongation of about 178%.

“Mounting tension of the waistband” is the stretching under which the laminate of the waistband is located when it is attached to an absorbent article. So, for example, if a laminate with a length of 100 mm when it is attached is stretched to a length of 170 mm, then the fixing tension is ((170 mm-100 mm) / 100 mm × 100%) = 70%. In one embodiment, the first pre-extension for any number of elastic yarns is about 100%, about 125%, about 140%, about 150%, about 160%, about 175%, or about 200%. In one embodiment, the second pre-extension for any number of elastic strands is about 100%, about 125%, about 140%), about 150%, about 160%), about 175%), or about 200%.

In one embodiment, the difference between the first pre-extension and the second pre-extension is more than about 20%, more than about 30%, or more than about 40%.

In one embodiment, the resulting difference in contraction of the front of the base and the rear of the base is more than about 5.0%, more than about 9.0%, more than about 9.5%, more than about 12.5%, more than about 15%, or more than about 20%.

In one embodiment, the difference in contraction of the front of the base and the rear of the base is less than about 15%, or less than about 12.5%, less than about 10%, or less than about 9.5% , or less than about 9%, with a reduction in the base portion in both the anterior region and the posterior region of more than about 18% or more than about 20%.

Another objective of the present invention is to provide an improved ratio of the thickness (and therefore softness) of the waistband to its reduction compared with the existing prior art. Currently, most waistbands are made on the basis of foam, and they are of sufficient thickness to ensure wearing comfort, but they provide a slight reduction; or waistbands are a combination of elastic threads and a non-woven fabric, and such ribbons have a high preliminary elongation, which ensures their good reduction, but they have insufficient thickness and softness to the touch when using. Therefore, in one embodiment, a waistband with “combined retraction” is proposed, namely, a waistband containing non-woven fabric and one or more elastic threads connected to each other at a higher first extension (pre-extension) is proposed, and the resulting laminate is attached to the product at lower tension (fixing tension), as a result of which the non-woven material forms folds and provides increased thickness / softness of the waist belt both in the initial state of the product and in the his-mentioned condition (when used). In FIG. 9 shows cross sections of various types of laminates (3000) of waistbands. So in FIG. 9a-9b are cross-sectional views of a waist belt without combined pulling together in a stretched state. In FIG. 9a shows a section of the product in its initial state, a plane parallel to the lateral axis of the base part (22) of the diaper. In FIG. 9b shows a section of the same product in the waist region with a plane parallel to the lateral axis of the base part (22) of the diaper, when the product is stretched. In FIG. 9c-9d are cross-sectional views of a waist belt having combined stretching contraction. Fig. 9c shows a section of a product in its initial state, by a plane parallel to the lateral axis of the diaper. From this drawing it can be seen that the amplitude and frequency of the folds on the waist belt are higher than on the base part to which it is attached. In FIG. 9d shows a section of a product in an extended state, in the waist region, by a plane parallel to the lateral axis of the diaper. From this drawing it can be seen that even with the extended condition of the base part, the waistband still has assemblies and correspondingly increased thickness.

In one of the embodiments, the waist belt contains a laminate containing non-woven material and at least one elastic thread, and the bonding of the non-woven material with elastic threads is performed during the first stretching (preliminary extension), and the waist belt is attached to the product during the second stretching (fixing tensile). In one embodiment, the first extension (also referred to as pre-extension) is more than about 50%, more than about 75%, more than about 100%, more than about 150%, more than about 200%, more than about 225%, more than about 250%, more than about 300%, more than about 350%, or more than about 375%. In one embodiment, the second extension (hereinafter referred to as the fastening extension of the waistband) is more than about 25%, more than about 50%, more than about 75%, or more than about 100%. In one embodiment, the difference between the first stretch and the fastener stretch, referred to as “combined pull”, is more than about 0%, more than about 65%, more than about 75%, more than about 100%, more than about 150%, more than about 200%, more than about 225%, more than about 250%, or more than about 300%.

In one embodiment, the waist belt has a “full combined retraction” of more than about 95%, more than about 100%, more than about 125%, more than about 150%, more than about 175%, more than about 200%.

In one embodiment, the waistband has a “combined stretch contraction” of more than about 35%, more than about 50%, more than about 75%, more than about 100%, more than about 125% , or more than about 175%.

In one embodiment, the waistband is attached in close proximity to the waistband. In one embodiment, the waistband is attached within 20 mm of the waistband. In one embodiment, the waistband is attached flush with the waistband. In one of the embodiments of the waist belt is available only on one waist edge. In one embodiment, the waist belt is present at both the first and second waist edges.

The nonwoven material and one or more elastic threads can be bonded to each other using adhesive, mechanical fastening methods or other fastening methods known in the art. The waistband may be attached to the product using adhesive, mechanical fastening methods, or other fastening methods known in the art.

In one embodiment, the thickness of the waistband in the initial state is more than about 1.60 mm, more than about 2.00 mm, more than about 2.25 mm, or more than about 2.50 mm.

In one embodiment, the thickness of the waistband in the stretched state of the article is more than about 0.80 mm, more than about 1.00 mm, more than about 1.25 mm.

Another objective of the present invention is to propose a single design, including a foot sealing system and front / rear waist belt, which provides additional protection against leaks around the perimeter of the product. Therefore, in one embodiment, the Leakage 360 protection system is proposed, which is a single system of foot sealing systems and waist bands, the elements of which have a similar design and a similar number of assembly folds. In some embodiments, there may be foot sealing systems and waistbands that overlap each other or have the same shades, texture, bond patterns, colors, or other visual similarities. In FIG. 3 shows an embodiment comprising folds of assemblies in both the waist regions and the foot sealing system.

In one embodiment, the absorbent article comprises a waistband and foot seal system described above, wherein the assembly on the foot seal system has a first number of folds, and the assembly on the waist strap has a second number of folds, and wherein the ratio of the first number of folds to the second number of folds is more than about 0.5, or more than about 0.75, but less than about 1.25, or less than about 1.50. In one embodiment, the ratio of the first number of folds to the second number of folds is about 1.00. In one embodiment, the ratio of the first number of folds to the second number of folds is from about 0.75 to about 1.25. In one embodiment, the ratio of the first number of folds to the second number of folds is from about 0.75 to about 1.25 if the assembly on the foot sealing system has a number of folds greater than about 13. In one embodiment, the ratio of the first number of folds to the second the number of folds is from about 0.75 to about 1.25 if the waistband assembly has a number of folds greater than about 12. In one embodiment, the ratio of the first number of folds to the second number of folds is from about 0.75 to about 1 , 25 if absorbed The product is a tape-mounted product.

In one embodiment, both the waistband and the foot sealing system comprise elastic threads; in one embodiment, the waistband comprises elastic threads; in one embodiment, both the waistband and the foot sealing system comprise stretchable material and / or laminate of the same type.

In one embodiment, the waistband comprises more than about 10 folds per assembly length of 30 mm, or more than about 12 folds per assembly length of 30 mm. In one embodiment, the foot sealing system comprises more than about 10 folds per assembly length of 30 mm, or more than about 12 folds per assembly length of 30 mm.

In one embodiment, a waistband is provided both on the first waistband and on the second waistband, and a foot sealing system is provided on both the first longitudinal edge and the second longitudinal edge.

The absorbent article 20 may include a foot seal system 70. In FIG. 4 and 5 are schematic cross-sections of suitable foot sealing systems. The foot foot sealing system 70 may comprise an inner barrier foot cuff 71 comprising a tucked-in edge 72 of the inner cuff and an edge 73 of the material of the inner cuff. The foot sealing system 70 may also comprise an outer cuff 74 comprising a tucked-up edge 75 of the outer cuff and an edge 76 of the outer cuff material.

In one embodiment, the foot sealing system 70 comprises a web of one material. Such an embodiment in which a web of one material is used provides a cost advantage over other embodiments in which a web of more than one material is used. In addition, an embodiment in which a web of one material is used can cause less leakage, since there are no holes that occur when several materials are attached to each other. Finally, an embodiment in which a web of one material is used may have a more attractive appearance since fewer mechanical bonds are visible.

In one embodiment, the foot sealing system 70 has an inner barrier foot cuff 71 comprising a tucked edge 72 of the inner cuff and an edge 73 of the material of the inner cuff. The foot sealing system 70 may also comprise an outer cuff 74 comprising a tucked-up edge 75 of the outer cuff and an edge 76 of the outer cuff material. In one embodiment, the web material is tucked laterally inward, resulting in a tucked-up edge 75 of the outer cuff, and tucked laterally outward, resulting in a tucked-in edge 72 of the inner cuff. In one embodiment, the web material is tucked laterally inward, resulting in a tucked edge 75 of the outer cuff being formed, and tucked laterally outward, resulting in an inner barrier leg cuff being formed. The material of the barrier leg cuff is tucked in the lateral direction inward, as a result of which the tucked edge 72 of the inner cuff is formed. The inner cuff contains two layers of material and is turned in the lateral direction outwards, as a result of which the inner barrier foot cuff and the fold 90 of the barrier foot cuff are formed, and in the lateral direction inward, as a result of which the folded edge of the inner cuff is formed. In one embodiment, the foot sealing system 70 is extended from the first waist edge to the second waist edge 38 and is attached to the top sheet 24 and / or the back sheet 26 between the turned edge of the inner cuff 72 and the turned edge 75 of the outer cuff in the crotch region 37. In one of the embodiments, the edge 76 of the material of the outer cuff is located in the lateral direction inside with respect to the edge 73 of the material of the inner cuff.

In one embodiment, the outer leg cuff 74 comprises elastic members 77 arranged in a laterally extended set between the tucked-out edge of the outer cuff 75 and the edge 76 of the outer cuff material. The outer cuff 74 may comprise at least two elastic elements 77, at least three elastic elements 77, at least four elastic elements 77, at least five elastic elements 77, or at least six elastic elements 77. In one of embodiments, elastic elements 77 may be located between the edge 73 of the material of the inner cuff and the tucked edge 75 of the outer cuff.

In one embodiment, the inner barrier leg cuff 71 comprises a set of elastic elements 78 in the region of the tucked-in edge 72 of the inner cuff. The inner barrier leg cuff 71 may comprise at least one elastic member 78; at least two elastic elements 78, at least three elastic elements 78, at least four elastic elements 78, or at least five elastic elements 78. In one embodiment, the elastic elements 78 may be located between the tucked-in edge 72 of the inner cuff and the edge 76 outer cuff material.

In one embodiment, the foot sealing system 70 has an inner barrier foot cuff 71 comprising a tucked edge 72 of the inner cuff and an edge 73 of the material of the inner cuff. The foot sealing system 70 may further comprise an outer foot cuff 74 comprising a tucked edge of the outer cuff 75 and an edge 76 of the outer cuff material. The foot sealing system 70 may comprise a first material comprising an inner barrier foot cuff 71 and a second material comprising an outer foot cuff 74. The first and second materials may overlap with each other and may be connected to each other along the longitudinal edge of each of the materials with any suitable way of fastening. In one embodiment, the web material is tucked laterally inward, resulting in a tucked edge 75 of the outer cuff, and tucked laterally outward, resulting in a tucked edge 72 of the inner cuff. In one embodiment, the proximal edges of the outer cuff 74 are aligned.

One of the advantages of the foot sealing system 70 in accordance with the present invention is that if a material substantially impervious to liquids is used in the structure, then the polymer film layer may be narrower or even absent, as a result of which such a structure will be cheaper. The use of reliable adhesive bonding technologies makes it possible to obtain essentially fluid-tight bonding lines, that is, in general, to increase the reliability of the product. This approach allows you to use a narrower layer of polymer film, which is only slightly wider than the absorbent core, which avoids overlapping bonding lines.

In some embodiments of the present invention, the polymer film layer is less than about 50 mm wider than the absorbent core; less than about 40 mm wider, or less than about 30 mm wider. In some embodiments, the polymer film of the back sheet is at least about 20 mm narrower than the width of the base portion; at least about 40 mm narrower than the width of the base portion; at least about 60 mm narrower than the width of the base portion; at least about 80 mm narrower than the width of the base portion; at least about 100 mm narrower than the width of the base portion; or at least about 120 mm narrower than the width of the base portion.

In one embodiment of the present invention, an overlay 80 may be used to enhance opacity and strength. An overlay 80 enhancing opacity and strength is an additional layer of material. The overlay 80 enhancing the opacity and strength can be connected to the foot sealing system 70, the polymer film layer or the back sheet 26. The overlay 80 enhancing the opacity and strength can be located between the back sheet 26 and the foot sealing system 70 in the first waist region 36 , back waist region 38, or in both of these product areas. An overlay 80 enhancing opacity and strength may overlap with the foot sealing system 70 and / or with a layer of polymer film. An opaque and strength reinforcing plate 80 may be attached to the foot sealing system 70 and / or the polymer film layer using any suitable means, such as glue, mechanical bonding, thermal bonding, and the like, so that stresses occurring during the process donning and wearing the product, passed from the lateral edge of the product to the foot sealing system 70 and / or a layer of polymer film. An advantage of an overlay 80 enhancing opacity and strength is that it provides the mechanical strength necessary to prevent excessive stretching of the article when it is being worn and worn; in addition, it provides additional opacity on the sides of the product and in the waist regions, so that the wearer's skin will not be visible through the product. From this point of view, an overlay 80 enhancing opacity and strength can be located anywhere in the base portion, in particular those places where opacity and mechanical strength are most desirable. Materials suitable for the manufacture of linings that enhance opacity and strength include materials having a specific gravity of at least about 10 g / m ² , at least about 15 g / m ² , or at least about 25 g / m ² . An opaque and strength reinforcing plate 80 suitable for use in the present invention may have the following transverse tensile properties: 0.4 H tensile strength with a technical deformation of 2% for a 1 inch wide specimen; tensile strength 1.25 H with a technical deformation of 5% for a sample 1 inch wide; tensile strength 2.5 N with a technical deformation of 10% for a sample 1 inch wide. An example of a suitable material for the manufacture of linings 80, enhancing opacity and strength, is the material manufactured by Pegas (Czech Republic), catalog number 803968.

In one embodiment, the foot sealing system 70 is made of a substantially liquid impervious material. The material may be selected from the group consisting of SMS non-woven fabric, SMMS type non-woven fabric (where S is a spunbond fabric, and M is a meltblown fabric) and may also contain a layer containing nanofibers.

Nonwoven webs may comprise SMS-type webs containing outer layers of spunbond webs of thermoplastic materials (e.g., polyolefins) and an inner layer of thermoplastic fibers blown from the melt. In one embodiment of the present invention, the foot sealing system 70 comprises a non-woven fabric layer of extremely thin fibers (nanofibers, or N-fibers) having an average diameter of less than 1 μm, used in conjunction with other nonwoven fabric layers. In some embodiments, a nanofiber layer (N-layer) can be used to make a nonwoven fabric of the SNS or SMNS type. A further description of the nanofibers is provided in WO 2005/095700 and US Patent Application 13/024844.

In one embodiment, the absorbent article includes an absorbent core 28, which is substantially free of cellulose, as described in US Patents 7,750,203; 7744576 and in US patent publication 2008/0312617 A1. Cross sections of various embodiments of suitable absorbent core structures are shown in FIG. 6-8. In one embodiment, the absorbent core 28 comprises first and second material layers 281, 282 and absorbent material 283 located between the first and second material layers 281, 282. In one embodiment, the first and second layers of material may include at least one of the following materials: a nonwoven fibrous web, a woven fibrous web, and a layer of thermoplastic adhesive material. And although the first and second layers can be made of the same material, in one embodiment, the first layer 281 is a nonwoven fibrous fabric, and the second layer 282 is a layer of thermoplastic adhesive material. Non-woven fibrous web 281 may include synthetic fibers, for example, single-component fibers of polyethylene, polyethylene terephthalate or polypropylene, or multi-component fibers of the configurations "side by side", "sheath / core" and "islands in the sea." Such synthetic fibers can be formed using spunbond or melt-blown processes. Non-woven fiber web 281 may include a single layer of fibers, but it may be preferable to include several layers of fibers, for example several layers of spunbond fibers, several layers of meltblown fibers or various combinations of layers of spunbond fibers and blown fibers melt. In one embodiment, the nonwoven fibrous web 281 can be treated with an active substance, for example, a surfactant, to increase the surface energy of the fibers of the web. Such active substances make the nonwoven fabric more permeable to liquids such as urine. In other embodiments, the nonwoven fabric may be treated with a substance that lowers the surface energy of the fibers of the fabric (e.g., silicone). Such active substances make the non-woven fabric less permeable to liquids such as urine.

The first layer 281 comprises a first surface 2811 and a second surface 2812, and at least regions 2813 of the first surface are in direct contact with a significant amount of absorbent material 283. In one embodiment, the absorbent material is located on the first surface 2811 in the form of regions 2813 on the first layer 281 which are in direct contact with a significant amount of absorbent polymer material 283 and regions 2814 on the first web, which are in direct contact only with no knowledge itelnym quantity of absorbent material. By “direct contact with a significant amount of absorbent material” is meant that the absorbent material is applied to a region 2813 with a specific gravity of at least 100 g / m ² , at least 250 g / m ² , or even at least 500 g / m ² . The absorbent material can be applied in the form of areas, all of which have the same shape and dimensions (base area and height). Alternatively, the absorbent material may be applied in the form of areas that have different shapes and sizes, for example, varying in gradient.

In one embodiment, the second layer 282 is a layer of thermoplastic adhesive material. In the context of the present description, "thermoplastic adhesive material" means a polymer composition from which the fibers are formed and applied to the absorbent material to immobilize the absorbent material in both dry and wet state. Non-limiting examples of thermoplastic adhesive materials may include single thermoplastic polymers or mixtures of thermoplastic polymers. The thermoplastic adhesive material may also be hot melt adhesive containing at least one thermoplastic polymer in combination with other thermoplastic components, such as tackifying resins, plasticizers and other additives, for example, antioxidants. In some embodiments, the thermoplastic polymer has a molecular weight (Mw) of more than 10,000 and a glass transition temperature (Tg) typically below room temperature (-6 ° C> Tg <16 ° C). In some embodiments, a typical polymer content in the hot melt adhesive is from about 20% to about 40% by weight. Suitable polymers are styrene block copolymers, including structures of three blocks of type ABA, structures of two blocks of type AB and block copolymers (AB) _{n of a} radial structure, where A are non-elastomeric polymer blocks, typically containing polystyrene, and B are unsaturated conjugated dienes or their (partially) hydrogenated forms. Block B is typically isoprene, butadiene, ethylene / butylene (hydrogenated butadiene), ethylene / propylene (hydrogenated isoprene), or mixtures thereof. Other suitable thermoplastic polymers are metallocene polyolefins, which are polymers made using a catalyst with a single center of metal polymerization (metallocene catalysis). In some embodiments, the tackifying resin typically has an Mw value below 5000 and a glass transition temperature Tg above room temperature. A typical resin content in hot melt adhesive is from about 30% to about 60% by weight. The plasticizer, as a rule, has a low molecular weight (less than 1000), a glass transition temperature Tg below room temperature and is used in a concentration of from about 0% to about 15%.

The thermoplastic adhesive material 282 can be substantially evenly distributed in the absorbent material 283. In alternative embodiments, the thermoplastic adhesive material 282 can be applied as a fibrous layer over the absorbent material 283 and regions 2814 of the first surface 2811 that are in contact with only a small amount of absorbent material. . In one embodiment, the thermoplastic adhesive material is applied in an amount of from about 1 g / m ² to about 20 g / m ² , from about 1 g / m ² to about 15 g / m ² , or even from about 2 g / m ² to about 8 g / m ² . The uneven application of the absorbent material on the first layer 281 gives an essentially three-dimensional structure to the fiber layer of the thermoplastic material 282. In other words, the layer of thermoplastic adhesive material repeats the topography of the absorbent material 283 deposited on the first nonwoven fibrous fabric 281 and regions 2814 that contain only a small amount of absorbent material . Although theoretically this is not necessary, it can be expected that the thermoplastic adhesive material in accordance with the present invention enhances the immobilization of the absorbent material in a dry and wet state.

In one embodiment, the absorbent core 28 may further comprise a second layer of nonwoven fibrous material 284. This second layer may be made of the same material as the nonwoven fibrous layer 281, or it may be made of another material. The manufacture of the first and second nonwoven fibrous layers 281, 284 from various materials can provide an additional advantage in the form of giving these layers different functional properties.

Region 2813 may have any suitable shape in the x-y plane of the absorbent core. In one embodiment, the regions 2813 are in the form of discs distributed over the first surface of the first web 281. In another embodiment, the regions 2813 are in the form of strips that are continuous in a continuous manner along the longitudinal axis of the absorbent core (in the y direction). In some embodiments, these strips may be located at an angle of 10 ° to 90 °, 20 ° to 80 °, 30 ° to 60 °, or even at an angle of 45 ° to the longitudinal axis of the absorbent article.

In one embodiment, the second nonwoven layer 284 has a first surface 2841 and a second surface 2842, and the absorbent material 283 is deposited on the first surface 2841, resulting in a set of regions 2843 that are in direct contact with a significant amount of absorbent material 283, and a set of regions 2844 on the first surface 2841, which are in direct contact with a small amount of absorbent material, as described above. In one embodiment, the thermoplastic adhesive material 285 may be additionally applied over the second non-woven layer 284, as described above with respect to the “first web / absorbent material / thermoplastic adhesive material” composite structure. Thereafter, a second nonwoven layer 284 may be applied over the first nonwoven layer 281. In one embodiment, the structure for applying the absorbent material to the second nonwoven layer 284 is the same as the structure for applying the absorbent material to the first nonwoven layer 281. In other embodiments, the application of absorbent material to the first and the second nonwoven layer differs in at least one of the following features: the shape of the application areas, the area of the application areas, the amount of absorbent material in the application areas and the type of absorber stripping material in the application areas.

The absorbent core 28 may also include additional adhesive, which is not shown in the drawings. Additional adhesive may be applied to at least one, or even both of the first and second nonwoven layers 281, 284 before applying the absorbent material 283 to enhance the adhesion of the absorbent material, as well as the adhesion of the thermoplastic adhesive material 282, 285 to the corresponding nonwoven layers 281, 284. The additional adhesive may also facilitate immobilization of the absorbent material and may contain thermoplastic adhesive material as described above, or may contain other adhesives, including but not limited to ayas of sprayed hot melt adhesives, including hot melt adhesive production H.B. Fuller Co. (St. Paul, Minnesota, USA), catalog number HL-1620-B. An additional adhesive may be applied to the nonwoven layers by any suitable means. In particular, in some embodiments, it may be applied in stripes from about 0.5 mm to about 1 mm wide at a distance of from about 0.5 mm to about 2 mm from each other. Non-limiting examples of suitable absorbent material 283 include absorbent polymeric materials, such as crosslinked polymeric materials, which can absorb a 0.9% salt solution in an amount of at least 5 times their own weight (Edana 441.2-01 measurement of holding capacity by centrifugation). In one embodiment, the absorbent material 283 is a particulate absorbent polymer material, that is, flowable in a dry state.

Examples

Differential reduction

(1) Anerle tape diapers (Philippines), size L (9-13 kg), SKU 90324495220, lot 20121009 WP071157C9236; green foam waistband enclosed in other layers of the product.

(2) Parents Choice tape diapers (USA), batch 9344M021759 S-1855; white foam waistband enclosed in other layers of the product.

(3) Diapers with tape fastening Moony (Japan), lot 910193071; green foam waistband enclosed in other layers of the product.

(4) Huggies Baby Steps Diapers United States, 1991, size 4, batch 3U251910248; white foam waistband in blue film.

(5) Huggies Supreme 2001 diapers, size 4, batch NM127501F0755; belt of green foam with elastic threads with a low denier, in a white film

(6) Drypers diapers, USA, size L, 9/8/1998; white foam waistband in white film

A - Pre-lengthening: 150%; Fixing tension of a waist ribbon: 150%; Pre-elongation difference front and rear: 0

B - Pre-lengthening: 200%; Mounting tension of the waist ribbon: 200%; Pre-elongation difference front and rear: 0

C - Pre-lengthening: 150%; Mounting tension of the waist belt: 130%; Pre-elongation difference front and rear: 20

D - Pre-lengthening: 200%; Mounting tension of the waist belt: 180%; Pre-elongation difference front and rear: 20

E - Pre-lengthening: 150%; Mounting tension of the waist belt: 110%; Pre-elongation difference front and rear: 40

F - Pre-lengthening: 200%; Mounting tension of the waist belt: 160%; Pre-elongation difference front and rear: 40

G - Pre-lengthening: 150% "; Mounting tension of the waist belt: 100%; Pre-elongation difference front and rear: 50

H - Pre-lengthening: 200%; Mounting tension of the waist belt: 140%; Pre-elongation difference front and rear: 60

I - Pre-lengthening: 200%; Mounting tension of the waist belt: 120%; Pre-elongation difference front and rear: 80

J - Pre-lengthening: 200%; Mounting tension of the waist belt: 100%; Pre-elongation difference front and rear: 100

Combined Contraction

(7) Huggies Snug & Dry, size 4; batch BI 103108B

(8) Huggies Little Movers, size 3; lot BI 024610B

(9) Huggies Overnight, size 4; lot PA 027104F

K - preliminary elongation of 75% and fixing tension of the waist belt 75%

L - preliminary elongation of 150% and fixing tension of the waist belt 75%

M - preliminary elongation of 225% and fixing tension of the waist belt 75%

N - preliminary elongation of 300% and fixing tension of the waist belt 75%

O - preliminary elongation of 375% and fixing tension of the waist belt 75%

360 Leakage Protection

P - preliminary elongation of 150% and fixing tension of the waist belt 75%

R - preliminary elongation of 150% and fixing tension of the waist belt 75%

Q - preliminary elongation of 150% and fixing tension of the waist belt 75%

Test methods

Method for measuring the reduction of the base

The reduction of the base part can be measured using a calibrated ruler that allows measurements to be made with an accuracy of 1 mm (according to relevant national standards, for example, the NIST standard), and a dynamometer that allows you to apply a force of 500 g-forces with an accuracy of 0.5 g -sil. A suitable dynamometer is the Chatillon DFS series manufactured by Ametek (Largo, Florida, USA). To hold the test sample, a spring clip with sponges 60 mm long and 10 mm wide was attached to the dynamometer. All measurements were carried out in a room in which a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 2% were maintained. Before measurements, the samples were kept for 2 hours at a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 2%.

To carry out this measurement, a section of the base part was selected that contains the back sheet but does not contain any straps or elastic “ears” attached to it. The product was unrolled without stretching the waist bands, and laid it on a flat horizontal surface of the desktop, with the back sheet down and the top sheet up. Planks or ears attached to the rear half of the product (if any) were also deployed and laid on the surface of the desktop. The back waist belt of the product was revealed. A calibrated ruler was laid across the product lying on the desktop and aligned with the lateral midline of the waistband. We measured the distance in the lateral direction from the right lateral edge of the base part to the left lateral edge of the base part and recorded its value with an accuracy of 1 mm. The value measured in this way is considered the “width of the rear of the base part in the initial state (RBCW)”.

A dynamometer was attached to the right distal edge of the base. The dynamometer must be attached so that the tensile force acts from left to right. The jaws of the clamp should be parallel to the longitudinal axis of the product and centered relative to the middle lateral line of the waist belt. About 3 mm of the base should be clamped in the jaws.

A strip of double-sided adhesive tape 50 mm wide and 900 mm long was glued to the desktop. They took the product so that the back sheet was facing the surface of the adhesive tape, and the back waist belt was parallel to the long side of the tape. The lateral middle line of the waist belt was combined with the lateral middle line of the adhesive strip. The first 3 mm of the left edge of the base was attached to the duct tape. With the help of a dynamometer, the back waist belt was stretched so that the applied force was 500 g-forces. The product was lowered and the back waist belt of the product was glued to the adhesive tape over the entire width of the base part. The dynamometer was detached from the base. A calibrated ruler was laid across the product and aligned with the lateral midline of the waistband. The distance in the lateral direction from the right distal edge of the base part to the left distal edge of the base part was measured and its value was recorded with an accuracy of 1 mm. The value measured in this way was considered the “width of the rear of the base in the extended state” (EBCW).

The procedure described above for the front waist belt was repeated and the “width of the front of the base in the initial state” (RFCW) and “the width of the front of the base in the stretched state” were similarly determined. The reduction rates of the base part were calculated according to the following formulas:

% back base reduction (% BCC) = (EBCW-RBCW) / EBCW × 100

% front base reduction (% FCC) = (EFCW-RFCW) / EFCW × 100

The difference in the reduction of the base part in the front and rear = absolute value (BCC-FCC)

Waistband Thickness

To measure the thickness of the waist belt in various states, we used the Ono Sokki digital micrometer (GS-503 measuring range with the DG-3610 digital scale) (Japan), which allows measurements to be made with an accuracy of 0.01 mm. Diameter foot was 1 cm, and the pressure applied to the sample was 0.5 lbs / ^in2. The readings were taken after holding the legs on the sample for 5 seconds. To measure the thickness of the waist belt in the stretched state, a steel plate 1.5 ± 0.1 mm thick, 20 cm wide and 40 mm long was placed under it. All measurements were carried out in a room in which a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 2% were maintained. Before measurements, the samples were kept for 2 hours at a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 2%.

The thickness of the waist belt in the initial state

The product was unrolled, trying not to stretch the waistbands at the same time, and laid it on the flat horizontal surface of the desktop, with the back sheet down and the top sheet up. Planks or ears attached to the rear half of the product (if any) were also deployed and laid on the surface of the desktop. The back waist belt of the product was revealed. Using a ruler, the size of the waistband was measured in the lateral direction, that is, along its longitudinal midline. The resulting value was considered "the length of the waist belt in the initial state." A mark was made on the said midline corresponding to 50% of the size of the waistband in the lateral direction. This point was called point WS1. Point WS2 located 1.5 cm to the left of the mark WS1 was also noted, and point WS3 located 1.5 cm to the right of the mark WS1.

The micrometer was mounted on the base and the digital scale was reset. The product was laid on the anvil with the top sheet up and the thickness of the product was determined at points WS1, WS2, and WS3 using a micrometer. The measured values of the thickness of the waist edge of the product in the initial state (designated RWC1, RWC2 and RWC3, respectively) were recorded with an accuracy of 0.01 mm.

Using a cryogenic atomizer (for example, CytoFreeze manufactured by Control Company, USA), the elastic element was carefully removed from the product. The product was laid on the base with the top sheet up and using a micrometer, the thickness of the product was measured at points WS1, WS2 and WS3. The measured values of the "thickness of the upper sheet in the initial state" (denoted respectively by RBC1, RBC2, RBC3) were recorded with an accuracy of 0.01 mm.

The thickness of the waist belt in the initial state was calculated by the formula:

The thickness of the waist belt in the initial state = [(RWC1-RBC1) + (RWC2-RBC2) + (RWC3-RBC3)] / 3

This procedure was repeated for three identical products, and the average value was recorded with an accuracy of 0.01 mm.

Stretch waistband thickness

The absorbent product was carefully unwrapped, trying not to stretch the waistbands. Assembled stand, which firmly held the horizontal rod. A spring clip was attached to the left edge of the base part so that the waistband was clamped in the center of the clip. The clip was suspended from a horizontal rod so that the waistband hung vertically. A second clamp was attached to the right edge of the base part, the mass of which was 300 ± 1 g, so that the waistband was also clamped in the center of the clamp. The product was allowed to hang for 30 seconds, after which, using a ruler, the length of the waistband was measured with an accuracy of 1 mm. The measured value was considered the "length of the base part in the extended state" (CEL), which was used in further measurements and calculations.

Another product was unfolded, trying not to stretch the waistbands at the same time, and laid it on a flat horizontal surface of the desktop, with the back sheet down and the top sheet up. Planks or ears attached to the rear half of the product (if any) were also deployed and laid on the surface of the desktop. The back waist belt of the product was revealed. Using a ruler, the size of the waistband was measured in the lateral direction, that is, along its longitudinal midline. The resulting size value was considered "the length of the waist belt in the initial state" (RWL). A mark was made on the said midline corresponding to 50% of the size of the waistband in the lateral direction. This point was called point WS1. Point WS2 located 1.5 cm to the left of the mark WS1 was also noted, and point WS3 located 1.5 cm to the right of the mark WS1. The proximal edge of the waistband was determined, that is, the edge closest to the crotch area of the article. A line was drawn in the lateral direction, located at a distance of 1.5 cm from the said proximal edge of the waist belt and parallel to this edge. The intersection of this lateral line with the longitudinal axis of the product passing through point WS1 was noted. The thus obtained point was designated AS1. Points AS2 and AS3 opposite the points WS2 and WS3, respectively, were noted.

The product was placed on a stainless steel plate, top sheet up. The left distal edge of the base part was fixed on a steel plate with adhesive tape, on the center line of the waist belt. They firmly grasped the right side of the base part and stretched it to such an extent that the length of the waistband became equal to the “length of the base part in the extended state” (CEL). The right side of the base was attached to the steel plate with adhesive tape.

A steel plate with the product attached to them was mounted on the base of the micrometer. The micrometer leg was lowered onto a section of a steel plate not covered by the product, and the digital scale was reset. After that, the thickness of the product at six marked points was measured with a micrometer. The readings were recorded with an accuracy of 0.01 mm. The measured values were considered the values of the "thickness of the waist edge in a stretched state" and designated EWC1, EWC2, and EWC3. Using a cryogenic atomizer, the elastic element was carefully removed from the product. The steel plate with the product was laid on the base of the micrometer and the thickness of the product was measured at points WS1, WS2 and WS3. The measured values of the “thickness of the upper sheet in the stretched state” (denoted respectively by EMC1, EMC2, EMC3) were recorded with an accuracy of 0.01 mm.

The thickness of the waist belt in the stretched state was calculated by the formula:

The thickness of the waist belt in the stretched state = [(EWC1-EBC1) + (EWC2-EBC2) + (EWC3-EBC3)] / 3

This procedure was repeated for three identical products and the average value was determined with an accuracy of 0.01 mm.

The combined pulling of the waist bands (in percent)

All length measurements described below were carried out using a calibrated ruler, which allows measuring the length with an accuracy of 1 mm (according to relevant national standards, for example, according to the NIST standard). All measurements were carried out in a room in which a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 2% were maintained. Before measurements, the samples were kept for 2 hours at a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 2%.

The absorbent product was deployed, trying not to stretch the waistbands. The product was laid on a flat horizontal surface of the desktop, with the back sheet down and the top sheet up. If the product had mounting strips or ears attached to its rear half, they were also deployed and laid on the surface of the desktop. The back waist belt of the product was revealed. The calibrated ruler measured the size of the waist belt in the lateral direction, on its midline, and recorded the result with an accuracy of 1 mm. This value was considered the “waist belt length in initial state” (RWL).

Using a cryogenic atomizer (for example, CytoFreeze manufactured by the Control Company, USA), the waistband was carefully removed from the product. The waistband was placed in a glass with 100 ml of dichloromethane and soaked for 15 minutes to dissolve the adhesives. After that, the waistband was removed from the solvent and elastic elements were removed from it. The basis of the waist belt was straightened and left in a flat state under the hood until dry. A stand was assembled in which a horizontal rod was fixed. A spring clip was attached to the left edge of the waistband at least equal to the width of the waistband. The clip was suspended from a horizontal rod so that the waistband hung vertically. A second clamp was attached to the right edge of the waistband, the mass of which was 3 ± 1 g, with a width at least equal to the width of the waistband. The product was allowed to hang for 30 seconds, after which, using a ruler, the length of the waistband was measured with an accuracy of 1 mm. The measured value was considered “the length of the waist belt in the extended state” (EWL). The total combined contraction of the waistband was calculated by the formula:

Full combined pulling the waist belt (%) = (EWL-RWL) / RWL × 100

This procedure was repeated for three identical products and the average value was determined.

The combined contraction of the waist ribbon in the extended state was calculated according to the formula:

The combined contraction of the waist belt in the extended state (%) = (EWL-RWL) / RWL × 100- (1 - ((CEL-RWL) / CEL) * 100)

This procedure was repeated for three identical products and the average value was determined.

The frequency of folds of the selected waist straps and cuffs in diapers with tape fastening

In the visually determined central part of the gathered waistband (relative to the directions of the CD and MD (the direction of movement in the car) of the diaper), the number of folds in a section 30 mm long was calculated. The number of folds was counted both at the end with fastening tapes (TE), and at the end without fastening tapes (UTE). For this, the measuring frame shown in FIG. 10, and the number of assembly peaks in a 30 mm wide window was counted. At the same time, they tried not to stretch the assembly. Counting was done for the end with tapes (TE), inside and out, and then for the end without tapes (UTE), inside and out. The number of folds thus determined was recorded on a 30 mm length section.

In the visually determined central part of the assembled foot sealing system (relative to the directions of the CD and MD diaper), the number of folds in a 30 mm long section was counted, both on the left side of the product and on its right side. For this, the measuring frame was held in place and the number of assembly peaks in a window 30 mm wide was counted. At the same time, they tried not to stretch the folds. The number of folds thus determined was recorded on a 30 mm length section.

The ratio of the folds on the assembled foot sealing system to the number of folds on the assembled waist belt was calculated by the formula:

Ratio = average number of folds in the assembled foot sealing system / average number of folds in the assembled waistband

This procedure was repeated for three identical products and the average value was determined.

Proportion of length and size in the direction of the CD

The proportion of length and size in the CD direction is defined as the ratio of the length of the base part in the stretched state (CEL) to the width of the back of the base part in the stretched state (EBCW), as defined above.

The proportion of length and size in the direction of CD was calculated by the formula:

Proportion of length and size in the direction CD = CEL / EBCW

This procedure was repeated for three identical products and the average value was determined.

The dimensions and their values contained in this document should not be construed as strictly limited to the exact values given. On the contrary, unless otherwise specified, a given value is understood to mean this value in accuracy and all values located in a functionally equivalent neighborhood. So, for example, a value designated as 40 mm should be considered as “approximately 40 mm”.

All documents cited in the detailed description of the present invention in part related to the present invention are mentioned for reference only. The citation of any document should not be construed as an admission that the cited document should be included in the prior art in relation to the present invention. If any meaning or definition of a concept in this document does not coincide with the meaning or definition of a given concept in a referenced document, one should be guided by the meaning or definition of a given concept contained in this document.

Although specific embodiments of the present invention are illustrated and described herein, one skilled in the art will appreciate that other changes and modifications are possible without violating the idea and purpose of the invention. For this purpose, it was intended in the appended claims to represent all possible similar changes and modifications within the scope of the present invention.

Claims (8)

1. A disposable absorbent article comprising a first waist region, a second waist region, a crotch region located between the first waist region and the second waist region; a first waistband and a second waistband; a first longitudinal edge and a second longitudinal edge; wherein the absorbent article comprises an elasticized waistband and an elasticized foot sealing system, wherein the waistband is located on the first waist and second waist edges, and the foot sealing system is located on the first longitudinal edge and on the second longitudinal edge, while the foot sealing system is characterized the first average value of the number of folds of the assembly, and the waistband is characterized by the second average value of the number of folds of the assembly, while the ratio of the said first the day value of the number of folds of the assembly to said second average value of the number of folds of the assembly is from 0.75 to 1.25, and the number of folds of the assembly of the foot sealing system is more than 13 in a section 30 mm long, while the waist ribbon is made of a laminate that contains a non-woven the material and at least one elastic thread, and wherein said at least one elastic thread is characterized by a preliminary elongation that corresponds to the stretching at which the elastic thread is when connected to a non-woven the material during the formation of the laminate, and the laminate of the waistband ribbon is characterized by the fastening extension of the waistband belt, which corresponds to the stretching at which the laminate of the waistband belt is attached to the absorbent product, said preliminary extension exceeding the abovementioned tensile waistband, while the waistband belt is characterized by a length of stretched state, the length in the initial state, and full combined contraction of more than 95%, moreover, a full combination The contraction of the waistband ribbon is determined by the percentage of the difference between the length of the waistband in the stretched state and the length of the waistband in the initial state to the length of the waistband in the initial state. 2. A disposable absorbent product made in the form of a product with a tape fastener, comprising a first waist region, a second waist region, a crotch region located between the first waist region and the second waist region; a first waistband and a second waistband; a first longitudinal edge and a second longitudinal edge; wherein the absorbent article comprises an elasticized waistband and an elasticized foot sealing system, wherein the waistband is located on the first waist and second waist edges, and the foot sealing system is located on the first longitudinal edge and on the second longitudinal edge, while the foot sealing system is characterized the first average value of the number of folds of the assembly, and the waistband is characterized by the second average value of the number of folds of the assembly, while the ratio of the said first the day value of the number of folds of the assembly to said second average value of the number of folds of the assembly is from 0.75 to 1.25, and the number of folds of the assembly of the waistband ribbon is more than 12 in a section 30 mm long, while the waistband ribbon is made of a laminate that contains non-woven material and at least one elastic thread, and wherein said at least one elastic thread is characterized by a preliminary elongation, which corresponds to the stretching at which the elastic thread is when connected to a nonwoven fabric and the formation of the laminate, and the waistband laminate is characterized by a fastening extension of the waistband which corresponds to the stretching at which the waistband laminate is attached to the absorbent product, said pre-extension exceeding said mounting tensile of the waistband, while the waistband is characterized by a stretched length state, the length in the initial state, and full combined contraction, comprising more than 95%, moreover, a full combined contraction The waist belt is determined by the ratio in percentage of the difference between the length of the waist ribbon in the extended state and the length of the waist ribbon in the initial state to the length of the waist ribbon in the initial state. 3. A disposable absorbent product according to claim 1 or 2, characterized in that the ratio of the first number of assembly folds to the second number of assembly folds is 1.00. 4. A disposable absorbent product according to claim 1 or 2, characterized in that the waistband and foot sealing system have laminar structures of the same type, similar color, bond configuration or texture. 5. The disposable absorbent product according to claim 1 or 2, characterized in that the waistband on the first waistband and the waistband on the second waistband are characterized by a difference in the reduction of the front and rear parts of the base part of more than 9.0%. 6. A disposable absorbent product according to claim 1 or 2, characterized in that the foot sealing system comprises an inner cuff and an outer cuff; wherein the inner cuff comprises a tucked-in edge of the inner cuff and an edge of the material of the inner cuff; wherein the outer cuff comprises a tucked-up edge of the outer cuff and an edge of the outer cuff material, and the web material is tucked in the lateral direction inward to form a tucked-up edge of the outer cuff and tucked in the lateral direction outward to form the edge of the inner cuff material. 7. A disposable absorbent product according to claim 1 or 2, characterized in that the foot sealing system is made extended from the first waist edge to the second waist edge. 8. A disposable absorbent product according to claim 1 or 2, characterized in that it further comprises a perforated top sheet.

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