SK151999A3 - Stabilized absorbent material and systems for personal care products having controlled placement of visco-elastic fluids - Google Patents

Abstract

There is provided a distribution material for personal care products which is a fabric which wicks artificial menses according to a horizontal wicking test a distance of about 1 inch in less than about 1.5 minutes. Materials meeting this performance criteria generally have a pore size distribution with a high percentage (usually more than 50 percent) of pore diameters between about 80 and 400 microns and a density below about 0.15 g/cc. There is also provided a personal care product system having a distribution/retention layer and a pad shaping layer wherein each layer has a stain length ratio of 0.5 or less and the distribution/retention layer has a saturation profile of 4 or less.

Description

STABILIZED ABSOFFICIAL MATERIAL AND SYSTEMS FOR PERSONAL USE PRODUCTS WITH CONTROLLED LOCATION OF VISCOSELASTIC FLUIDS

This application claims priority from US Provisional Applications Nos. 60/046 701 and 60/046 480, filed May 14, 1997, and No. 60/079 657, filed March 27, 1998.

Technical field

The present invention relates to a material structure and an absorbent structure or system that is useful in personal articles such as disposable sanitary napkins, diapers or incontinence products. In particular, the present invention relates to absorbent systems that have to treat complex viscous body fluids such as menstrual fluids.

BACKGROUND OF THE INVENTION

Absorbent articles such as sanitary napkins or sanitary napkins, diapers and incontinence products are intended to absorb and contain body fluids. Current products have an inadequate function in that they have a higher than desired level of leakage, which creates stains on clothing. Furthermore, current products are not designed to fully meet other consumer requirements such as dryness, adhesion, comfort and security. Many of these requirements are affected by the ability of the product to handle fluids. Despite ongoing improvements in this field, for example by introducing "wings" where a portion of the sanitary napkin is bent around the underwear to protect against leakage, there remains a need for female sanitary products with reduced permeability and improved comfort.

311 / B

Most commercially available liners have a relatively high leakage rate. These inserts can disappoint in up to 30% of cases and disturbances of around 20% are quite common. These disorders are believed to be due to the very viscous nature of the menstrual fluids and the high variability in the delivery volume, resulting in overloading of the pads in the target area and subsequent leakage. Insufficient distribution of menstrual fluids is believed to be one of the key reasons for congestion of the target space.

In the field of urine management, in personal hygiene products such as diapers, the spreading is often ensured by materials having small pores and a narrow pore size distribution. Such materials must move large volumes of low-viscosity urinary excretion from the target area in sufficient time to allow the target area to capture another secretion. Moving urine to relatively distal parts of the diaper prevents significant hydrostatic pressure. In contrast, feminine hygiene products have a lower overall volume but fluids with a higher viscosity, making it more difficult to transfer fluids. Spreading substances must be quite different for feminine hygiene products and for products originally intended for urine management.

Several examples of improved urine management systems can be found in U.S. Patent Applications Ser. 08/754 414 and 08/755 136, which have generally been abandoned, describe the use of advanced absorbent materials and system design. While the physics of fluid handling is similar in some respects to menstrual fluids and urine, the complex nature of menstrual fluids, as well as the variability of menstrual fluids and the conditions of use of the product, require substantially different arrangements of absorbent materials and systems as required for urine handling. Previous attempts to provide feminine hygiene products with lower leakage include US Pat. Nos. 5,549,589, 5,466,232 and 5,200,248, which discuss distribution structures for menstrual fluids. None of these references provides a unique combination of features of the invention.

311 / B

SUMMARY OF THE INVENTION

It is an object of the present invention to provide feminine hygiene products with excellent distribution performance to allow menstrual fluids to move from the target area and provide comfort, dryness and lower leakage than conventional sanitary napkins.

It is an object of the present invention to provide improved female sanitary products with reduced leakage and improved comfort by using materials designed to conform to the nature of menstrual fluids and subsequently direct the menstrual fluids to an absorbent system that substantially isolates them in a particular area of the absorbent system. It is a further object of the invention to provide female hygiene articles having pores that are accessible and capable of retaining an adequate amount of fluids without adversely affecting infiltration and distribution. Summary of the Invention

The object of the invention is achieved by means of a guide material comprising stabilized, high absorbent fibers arranged to provide capillary pore dimensions and a degree of wicking suitably selected for absorbing viscoelastic fluids. When exposed to viscoelastic fluids and the like, these materials show improved fluid distribution, with respect to wicking distances, wicking rates, as well as the amount of fluid transferred.

The distribution material for the personal hygiene articles of the present invention is a fabric that sucks artificial menstrual fluids according to a horizontal suction test to a distance of about 2.5 cm (1 inch) in less than about 1.5 minutes. Materials with such performance criteria generally have a pore size distribution over a large percentage range (mostly greater than about 50%) with a pore diameter of between about 80 and 400 gm and a specific gravity below about 0.15 g / cm ³ .

311 / B

Also provided is a personal hygiene article system comprising a diverting / retention layer and a pillow-shaped layer, wherein each layer has a soiling length ratio of 0.5 or less and the diverting / retention layer has a saturation profile of 4 or less.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a graph of the pore size distribution of the material of Example 1, Repeat 1, with a specific gravity of 0.05 g / cm ³ .

Fig. 2 is a graph of the pore size distribution of the material of Example 1, Repeat 2, with a specific gravity of 0.05 g / cm ³ .

Fig. 3 is a graph of the pore size distribution of the material of Example 1, Repeat 1, with a specific gravity of 0.1 g / cm ³ .

Fig. 4 is a graph of the pore size distribution of the material of Example 1, Repeat 2, with a specific gravity of 0.1 g / cm ³ .

Fig. 5 is a graph of the pore size distribution of the non-oriented material of Example 2 with a density of 0.028 g / cm ³ .

Fig. 6 is a graph of the pore size distribution of the material of Example 2 with a specific gravity of 0.068 g / cm ³ .

Fig. 7 is a graph of the pore size distribution of the oriented material of Example 2 with a density of 0.028 g / cm ³ .

Fig. 8 shows a multi-layer arrangement.

Fig. 9 shows an example of cover material.

Fig. 10 shows the suction layer.

Fig. 11 shows the distribution / containment layer.

Fig. 12 shows a backsheet or a pillow-like layer. Fig. 13 shows a two-layer arrangement for feminine hygiene articles. Fig. 14 shows a type of four-layer arrangement.

311 / B

Fig. 15 is a bar graph for systems having a topsheet, a second layer that is a distribution / containment layer, and a third layer that is a pillow-forming layer. The column size shows the liquid uptake in grams.

Fig. 16 illustrates an arrangement for female sanitary articles comprising a sinusoidal profile.

Fig. 17 shows a convex profile for personal hygiene articles that are packaging profiles.

Definitions "Disposable" includes cases that are postponed after use and are not intended for cleaning and re-use.

"Front" and "rear" are used in the description to indicate the relationship with the product itself rather than advise on any placement of the product that is assumed when placed on the carrier.

&Quot; Hydrophilic " describes fibers or fiber surfaces that are soaked upon contact of an aqueous solution with the fibers. The degree of wetting of the material can in turn be described by the contact angles and surface tension of the fluids and associated materials. Equipment and procedures suitable for measuring the wettability of particularly fibrous materials may be determined using a Cahn SFA222 Surface Force Analyzer System or a substantially equivalent system. When measured with this system, fibers with a contact angle of less than 90 ° are labeled "wettable" or hydrophilic, while fibers having a contact angle equal to or greater than 90 ° are labeled "non-wettable" or hydrophobic.

"In" or "out" refers to a position relative to the center of the absorbent article, and in particular transversely and / or along closer to or from the longitudinal and transverse center of the absorbent article.

311 / B

The word "layer" in the singular may have a double meaning, may refer to one element or a plurality of elements.

"Fluid" means a substance and / or material that flows and can assume the internal shape of a container into which it flows or is placed.

"Fluid connection" means that the fluid is able to pass from one layer to another layer or from one location to another in the layer.

"Longitudinally" or "transversely" has its original meaning. The longitudinal axis lies in the plane of the object when the object lies flatly unfolded and is generally parallel to the horizontal plane and divides the standing wearer into the left and right body halves when the member is worn. The transverse axis lies in the object plane generally perpendicular to the longitudinal axis. The object, as shown, is longer in the longitudinal direction than in the transverse direction.

"Particle" refers to any geometrical figure such as spherical grains, cylindrical fibers or threads, flat or rough surfaces, sheets, ribbons, strings, strips and the like, but this is not limited.

"Spray" and variations thereof include heavily sputtered fluid, whether as a jet, such as a swirling fiber or crumbled particles, by passing through a throat, nozzle, and the like, by applying air or other gas pressure, by gravity or by centrifugal force. The spray can be intermittent or uninterrupted.

As used herein, the term "nonwoven fabric or web" means a web with a structure of individual fibers or yarns which are folded over one another but not with a recognizable structure as a knitted fabric. The nonwoven web or web has been formed by a variety of techniques such as melt blowing, spinning and web bonding. The basis weight of the nonwoven fabric is generally expressed in grams per square meter (g / m ² ) or ounces per square yard (axes), and the fiber diameter is usually expressed in micrometers. (To convert from axis to g / m ² , multiply the axes by a factor of 33.91.)

311 / B

As used herein, the term "centrifugal bundling" of fibers refers to small diameter fibers that are formed by extruding thermoformed thermoplastic material as a plurality of fine, usually circular spinneret capillaries with extruded filament diameter, which then rapidly shrinks as described in e.g. U.S. Pat. No. 4,340,563 to Appel et al., U.S. Pat. No. 3,692,618 to Dorschner et al., U.S. Pat. No. 3,802,817 to Matsuki et al., U.S. Pat. 3,338,992 and no. No. 3,341,394 to Kinney, U.S. Pat. No. 3,502,763 to Hartman and U.S. Pat. 3,542,615 Dobo et al. The spunbond fibers are generally not sticky when placed on the collection surface. Centrifugally bonded fibers are generally continuous and have a mean diameter (of at least 10 fibers from the sample) of greater than 7 gm, especially between about 10 and 20 gm. These fibers may also have the shape as described in U.S. Pat. No. 5,277,976 to Hogle et al., U.S. Pat. No. 5,466,410 Hills and U.S. Pat. Nos. 5,069,970 and 5,057,368 to Largman et al., Which disclose fibers with unusual shapes.

As used herein, the term " meltblown fibers " means fibers formed by extruding molten thermoplastic material through a plurality of fine, mostly circular, capillary nozzles such as molten yarns or filaments into a concentrated gas (e.g., air) beam, usually hot, causes the filaments of molten thermoplastic material to reduce their diameter, which may be the diameter of the microfiber. Later, the meltblown fibers are entrained by a high velocity gas stream and are located on the collecting surface in the form of a web of randomly arranged in the meltblown fibers. This method is described, for example, in U.S. Pat. No. 3,849,241 to Bulin et al. The meltblown fibers are microfibers which can be continuous or discontinuous and have a mean diameter of less than 10 gm and are generally sticky when placed on a collecting surface.

As used herein, the term " coform " means a method in which at least one melt-blowing nozzle head is located near the chute through which other materials are added to the web during its formation. These materials may be

311 / B, for example technical pulp, superabsorbent particles, natural polymers (for example, rayon or cotton fibers) and / or synthetic polymeric fibers (for example, polypropylene or polyester), these fibers may be, for example, staple lengths. Formal processing methods are generally described in U.S. Pat. No. 4,818,464 to Lau and U.S. Pat. 4 100 324 Anderson et al. Nonwovens produced by coform processes are generally referred to as coform materials.

As used herein, the term "polymer" generally includes, but is not limited to, homopolymers, copolymers such as block copolymers, graft copolymers, random and alternating copolymers, terpolymers, and the like. and mixtures and modifications thereof. Further, unless expressly stated otherwise, the term "polymer" encompasses all possible geometric arrangements of the molecule. Such arrangements include, but are not limited to, isotactic, syndiotactic, and random symmetry.

As used herein, "machine direction" or "MD" means the length of the fabric in the direction in which it is produced. The term "transverse to machine direction" or "CD" means the width of the fabric, i. a direction generally perpendicular to the MD.

As used herein, the term "monocomponent" fiber refers to a fiber formed from one or more extruders using only one polymer. This does not mean the elimination of fibers formed by a single polymer to which a small amount of additives have been added due to coloring, antistatic properties, lubrication, hydrophilicity, etc. These additives, for example titanium dioxide for coloring, are generally present in an amount of less than 5% by weight and more usually about 2% by weight.

As used herein, the term "composite fibers" refers to fibers that have been formed from at least two polymers extruded by separate extruders, but spun together to form a single fiber. Compound fibers are also sometimes referred to as multicomponent or bicomponent fibers. These polymers usually differ from each other, although the composite fibers may be monocomponent fibers. The polymers are disposed in a substantially constant, clearly visible region across the cross-section of the composite fibers and extend continuously along the

311 / g

lengths of composite fibers. The arrangement of such composite fibers may be, for example, a sheath / core arrangement where one polymer is wrapped by another, may be arranged alongside each other, in a cake arrangement or in an "island in the sea" arrangement. The composite fibers are disclosed in U.S. Pat. 5,108,820 Kaneko et al., U.S. Pat. No. 4,795,668 to Krueger et al., U.S. Pat. 5,540,992 Marcher et al. and U.S. Pat. 5,336,552 Strack et al. Compound fibers have also been disclosed in U.S. Pat. No. 5,382,400 to Pike et al. and may be used to form a crimping on the fibers used at different stretching and contracting speeds of two (or more) polymers. The crimped fibers can also be produced mechanically and by the method of German patent DT 25 13 251 A1. For bicomponent fibers, the polymers may be present in ratios of 75/25, 50/50, 25/75 or any other desired ratio. These fibers may also have the shapes as described in U.S. Pat. No. 5,277,976 to Hogle et al., U.S. Pat. No. 5,466,410 Hills and U.S. Pat. Nos. 5,069,970 and 5,057,368 to Largman et al., Which disclose fibers with unusual shapes.

As used herein, the term "bicomponent fibers" means fibers that have been formed from at least two polymers extruded from the same extruder as the blend. The term "mixture" is explained below. The bicomponent fibers do not have different polymerization components located in relatively evenly spaced distinct areas on the fiber cut, and the different polymers are not usually continuous along the entire length of the fiber, but instead tend to form fiber or fiber filaments that start and end randomly. Bicomponent fibers are also sometimes referred to as multicomponent fibers. Fibers of this general type are described, for example, in U.S. Pat. Nos. 5,108,827 and 5,294,482 to Gesser. The bicomponent fibers are also described in the Polymer Blends and Composites textbook by John A. Manson and Leslie H. Sperling, Copyright 1976, Plenum Press, Plenum Publishing Corporation of New York, IBSN 0-306-30831-2, pages 273-277. .

As used herein, the term "blend" refers to a blend of two or more polymers, while the term "alloy" means a subset of blends in which the parts are immiscible but can be compatible. The term "miscible" or "immiscible" is defined as a mixture with a negative or a positive

311 / B value for free mixing energy. Further, the term "compatibilization" is defined as the process of modifying the interfacial properties of an immiscible polymerization mixture to form an "alloy".

"Bonded carded web" means a spunbond that has been made from staple fibers that have been treated with a bonding or bundling unit that separates and aligns the staple fibers in the machine direction in the form of a machine-oriented fibrous nonwoven web. Such fibers are commonly purchased in ladies which are placed in a lifter that separates the fibers in front of the carding unit. Once the web is formed, it is joined by one or more of the known bonding methods. One of these bonding methods is powder bonding, wherein the powdered adhesive is applied after the spunbond and then activated, most often by heating the web and the adhesive with hot air. Another suitable bonding method is pattern bonding, wherein a heated calender roller or ultrasonic bonding device is used to bond the fibers together, most often by a local bonding pattern, by which the web can be bonded over the entire surface if desired. Another suitable and well known method, especially when using bicomponent staple fibers, is air bonding.

"Air-laying" is a well known method by which fibrous nonwoven layers can be formed. In the air-laying method, small fiber bundles with a characteristic length in the range of about 6 to about 19 mm are separated and enter the air stream and then placed on a generating surface, mostly by means of vacuum. The randomly spaced fibers are further coupled to other, for example, hot air or adhesive spray.

The term "personal articles" means diapers, baby pants, absorbent trousers, adult incontinence products, dressings and feminine hygiene products.

311 / B

Testing methods

Material clamp (thickness):

The material clamp is a thickness gauge and measured at 344 Pa (0.05 psi) using a Starret-type thickness gauge in millimeters.

density:

The density of the material is calculated by dividing the weight per unit area of the sample in grams per m ² (g / m ² ) by the sample thickness in millimeters (mm) at 68.9 Pa and multiplying the result by 0.001 to convert the value to g / cm ² . To obtain a density value, three samples are scored and the result averaged. Tampon time and horizontal fluid flow through the absorbent structure

A sample specimen of approximately 2.5 cm (8 inch) by 20 cm (8 inch) is positioned horizontally such that when placed in the liquid container at the start of the test, the specimen sample just touches the surface of the fluid. The relative humidity during the measurement should be maintained from about 90 to about 98%. The sample blank is placed next to a large (effectively infinite) amount of fluid, and as soon as the edge of the sample blank touches the surface of the solution, the stopwatch starts.

The horizontal distance of the face of the fluid moving through the sample slice and the weight of the fluid absorbed by the sample are recorded at different times. The measured values also determine the weight of the liquid absorbed by the snippet sample from the start of measurement to about 1.3 cm (0.5 inch), 2.5 cm (1 inch), 5 cm (2 inch) and 7.6 cm (3 inch) ).

The fluid used in this assay was a fluid designed to simulate the viscoelastic and other menstrual fluid properties and was produced according to the method described in the following assay.

311 / B

Method of flat-system testing

Purpose:

Determination of fluid handling characteristics from different absorbent systems by analyzing the dirt length, saturation capacity, and fluid loading of the pad system.

Appliances:

Clock-shaped acrylic plates (with an opening of 6.3 mm (0.25 inch) in the center) weighing approximately 330 g, syringes, 3.2 mm (1/8 inch) inner cross-section, Tygon tube, pipette pump, menstruation simulans, laboratory scales (accuracy to 0.00 g).

Preparation:

1. The components are cut to the desired shape (3.8 cm by 13.97 cm (1.5 by 5.5 inch) for the inlet and partition layer, 4.44 cm by 13.97 cm (1.75 by 5, 5 inch) for the transmission delay layer, 200 mm watch glass length for the perimeter of the layer).

2. Mark 13.97 cm (5.5 inch) layers on 2.79 cm (1.1 inch) parts and the perimeter layer on the parts corresponding to the markings on the blanks that are centered on the perimeter layer.

3. Each component shall be weighed and its mass recorded.

4. Assemble the individual components into the desired component system according to the ordered labeled components. Mark one end as the top.

5. Fill the syringes with menstruation simulans and attach the Tygon tube to the syringes.

6. Place the syringes in the pipette pump.

7. The pump is programmed (concurrent use of 30 cm ³ ) syringes discharging 10 ml of simulans per hour).

311 / B

8. Through the open ends of the tube located in the beaker, it is first conveyed by the process pump until all air comes out of the tube and the simulans are exiting the tube at the driven end.

9. Component systems to be tested shall be placed close to the pipette pump. Place approximately a 5 by 15 cm (2 by 6 inch) portion with 25 g / m ² , 10d BCW on top of the center of the whole, and place the acrylic plate in the center on top of the whole.

10. Insert the free end of one tube into the hole in the acrylic plate. This is repeated for the remaining test systems.

11. The pipette pump will start to work.

12. At the end of working hours, the tube and acrylic plates are removed. Carefully remove the BCW (without moving with the layers below) and discard.

13. Take photos of the folder and layer system and print the photos.

14. Weigh each layer separately and record the weight.

15. At the beginning, the end marked as top shall be cut off and the first marked part shall be weighed and its weight recorded. This is repeated for the remaining parts and layers.

16. Measure and record the soiling length for each layer.

17. The data is entered into a spreadsheet, plotted and analyzed.

The menstruation simulans used for testing were produced as follows.

Blood, in this case defibrinated pork blood, was separated by centrifugation at 3000 rpm for 30 minutes; other methods, speeds or times may be used if effective. Plasma was separated and stored separately, the leukocyte clot was removed and discarded, and separate red blood cells (blood cells) were also stored separately.

311 / B

The eggs (in this case Jumbo chicken eggs) were separated, the yolk and the shell were discarded and the white was retained. The whites were separated into a thick and thin portion by filtering the whites through a 1000 gm nylon mesh for about 3 minutes and the lower portion was discarded. Note that a different mesh size can be used and the separation time or method can be changed, provided that the viscosity is at least as desired. The dense part of the whites that were retained on the mesh was captured and placed in a 60 cm ³ syringe in which it was placed in a programmable syringe pump and homogenized five times by squeezing and absorbing the contents. In this case, the extent of homogenization was controlled by a syringe pump at a rate of about 100 ml / min, the inner diameter of the tube being about 0.3 mm (0.12 inch). After homogenization, the dense portion of white had a viscosity of at least 20 MPa.s in 150 seconds and was then placed in a centrifuge and centrifuged to remove tissue debris and air bubbles at a speed of 3000 rpm for about 10 minutes, using any effective method for removing tissue debris and bubbles.

After centrifugation, homogenized egg white thick portion containing the ovamucín, was added to 300 ^cm3 of transport packaging Fenwal ^(R) using a syringe. Then, 60 cm ^{3 of} pig plasma was added to the transport package. Then the package was sealed with a clamp, all air bubbles were removed, and the package was placed in a Stomacher laboratory meter where it was stirred at normal (or medium) speed for 2 minutes. Then the shipping package was removed from the mixer, 60 cm ^{3 of} red pork cells were added, and the contents were mixed by hand for about 2 minutes until it appeared homogeneous. The hematocrit of the final blend showed a red blood cell content of about 30% by weight and should generally be at least in the range of 28 to 32% by weight for artificial menstrual fluids made according to this example. The amount of egg white was about 40% by weight.

311 / B

The ingredients and devices used to prepare these artificial menstrual fluids are readily available. The following is a calculation of the sources for the items used and it is of course assumed that other sources may be used to produce approximately the same fluids.

Blood (pork): Cocalico Biologicals, Inc., 449 Stevens Rd., Reamstown, PA 17567, (717), 336-1990.

Fenwal ^(R) Transfer Pack Container, 300 ml with coupling device, code 4R2014: Baxter Healthcare Corporation, Fenwal Division, Deerfield, IL 60015.

Hardward Apparatus Programmable Syringe Pump Model no. 55-4143, Harvard Apparatus, South Natick, MA 01760.

Stomacher 400 laboratory mixer, model no. BA 7021, serial number 31968: Seward Medical, London, England, UK.

1000 pm mesh, item number CMN-1000-B: Small Parts, Inc., P.O. Box 4650, Miami Lakes, FL 33014-0650, 1-800-220-4242.

Hemata Stat-11 Hematocriteter, Serial No. 1194Z03127: Separation Technology, Inc., 1096 Rainer Drive, Altamont Springs, FL 32714.

Pore Size Distribution: The pore size distribution of the material is measured using a porous plate method used by Burgen and Kapur in The Textile Research Journal, 37, 356 (1967). Using this device, the amount of fluid desorbed from the sample material at various pressures can be correlated with the pore radius in the material. This method is described in Chattterjee's Absorbancy, Elsevier Science Publishers, B.

V. 1985, pp. 36-40.

The modified system used consists of a movable structure associated with a programmable stepper motor and electronic scales controlled by a personal computer. The controller automatically sets the desired construction height, collects data at a given sample rate until equilibrium is reached, and then sets the next

311 / B calculated height. The Plexiglas ^(R) support structure is used to keep the material / porous sheet at a certain level in the top position throughout the test. Optional parameters for this method include sample rate, equilibrium criterion, and range of pore sizes measured. Data for these test materials was obtained using mineral oil (820 kg / m ³ , 32 mNm ^-1 (dyn.cm), 0 ° C fluid contact angle) as the test liquid. At the beginning of each test, a sample of material is placed on the porous plate and then the sample is completely saturated by reducing the porous structure of the plate. The pore size is then determined by collecting mass values as the pressure (ie, the size of the structure) increases. The equilibrium is reached if, after four 60 second intervals, the change is less than 0.05 g / min.

Values are given as a percentage of the pore volume to the pore radius in micrometers by plotting the pore size on the x-axis and incremental weight change divided by the total weight change on the y-axis.

DETAILED DESCRIPTION OF THE INVENTION

The present invention is a group of guide materials comprised of stabilized, high absorbent fibers laid to provide capillary pore size and a degree of infiltration ideally adapted to absorb viscoelastic fluids. Stabilization may be achieved by the use of liquid binders, binder fibers, thermally, or other methods known to those skilled in the art. When exposed to viscoelastic fluids or fluid simulans, these materials show an improved ability to distribute fluids over infiltration distances, infiltration rate, and amount of fluid transferred. The pore characteristics are stable when the fibers are dry or only slightly soaked, preferably less than about 25%, more preferably less than 20% and most preferably 15%, swollen or collapsed when wetted by viscoelastic fluid simulans. All these features are critical to the overall functionality of the distribution materials located in the targeted area of personal care products, such as in sanitary napkins.

311 / B

Samples of dry and wet measured material, i. after saturation of menstrual fluid simulans using a pressure gauge at 0.135 Pa (0.02 psi) with a clamp diameter of 5 cm are shown below.

mass specific % technical dry Wet foundation mass pulp / clamp clamp reduction (g / cm ² ) (g / cm ³ ) binder (Mm) (Mm) (Mm) 100 0.06 90/10 0,190 0,175 0,015 0,195 0,165 0,030 0,198 0,170 0,027 average 0,195 0,170 0,025 100 0.10 90/10 0,149 0,137 0,012 0,157 0,152 0,005 0,162 0,137 0,020 average 0,157 0,144 0,012 200 0.08 90/10 0,276 0,231 0,012 0,279 0,248 0,045 0,261 0,241 0,020 average 0,271 0,241 0,033 200 0.20 90/10 0,116 0,132 -0,015 0,127 0,119 0,007 0,106 0,111 -0,005 average 0,116 0,121 0,005

311 / B

An appropriate capillary pore structure within a given infiltration range of important fluids is required for the ability to distribute fluids. Distribution materials have been developed using several technological approaches that demonstrate the necessary material characteristics of the base material for the desired performance. Examples of these materials are as follows.

Example 1

In this example, the distribution material consists of about 80% by weight fine technical pulp (Rayonier R-9401 Mercerized Technical Pulp from Southern coniferous wood) and about 20% by weight connecting Danaclon (5 mm) short fibers, polyethylene / propylene (PE / PP) ) Sheath / core composite fibers with a titer of 2.2 g per 9000 m length with finisher S2 / B2 / 39. This finisher is referred to as a finisher retaining hydrophilicity after repeated damage. This material was produced in three different specific weights, 0.05 g / cm ³ , 0.1 g / cm ³ and 0.2 g / cm ³ with a weight basis of about 100 to 250 g / m ² . Examples of materials having specific weights of 0.05 g / cm ³ , 0.1 g / cm ³ and 0.2 g / cm ³ at a basis weight of about 125 g / m ² are given for comparison.

These materials were tested by a horizontal tampon test which was repeated a total of three times using 2.5 x 20.3 mm (1 x 8 inch) samples. Table 1 shows the weight results in grams of retained fluid, time in seconds, and ND means "not achieved".

The fine technical pulp was from Rayonier Inc., Jessup, GA 31545. The binder fibers were from Danaklon a / s, Engdraget 22, KD-6800 Varde, Denmark and were composite fibers with a titer of 2.2 g per 9000 m length, PE / PP sheath / core, chopped to 5 mm.

The distribution material was produced by Dan-Web air laying. Any other suitable method known to one skilled in the art can be used to produce this material. Some samples were tested for pore size distribution. The results are shown graphically in FIG. 1, 2 and 3, respectively

311 / B pore size distribution for 0.05 g / cm ³ repetition 1 and repetition 2 and 0.1 g / cm ³ repetition 2. The results show that as the density decreases and the pore size increases, the tamponing ability of the material increases greatly.

Repetition 1 Repetition 2 Repetition 3 (Cm) mass (G) time (with) mass (G) time (with) mass (G) time (with) 0.05 g / cm ³ 1.25 1.26 50 1.15 50 1.13 54 2.54 1.80 161 1.77 170 1.55 170 5.08 1.56 633 1.71 611 1.48 714 6.62 1.02 ND 0.89 ND 0.72 ND 0.1 g / cm ³ 1.25 0.86 20 0.68 24 0.76 18 2.54 1.14 155 1.07 123 1.03 139 5.08 0.95 811 0.91 868 0.9 810 6.62 0.32 ND 0.16 ND 0.23 ND 0.2 g / cm ³ 1.25 0.79 56 0.83 43 0.73 56 2.54 1.11 253 1.03 174 0.98 245 5.08 0.62 ND 0.96 1074 0.76 ND 0.21 ND

311 / B

Example 2

In this example, the guide materials are bonded with a carded web made of 100% off-center sheath / core composite fibers of polyethylene and polypropylene available from Chisso Chemical Co., Japan. These fibers have a finishing (known as HR6) applied to them. The table further shows the tampon results for a sample of 0.028 g / cm ³ , a sample of 0.068 g / cm ^3, and 0.028 g / cm ³ in which the fibers were oriented during the carding process. The table below shows the distance in cm, the weight in grams, and the time in minutes and seconds as indicated. The pore volume distribution was tested and the results are plotted in FIG. 4, 5 and 6. These data show that when a high percentage of pore volume has pores ranging from about 200 to about 400 µm, better tamponizing efficiency is achieved.

Specific weight distance mass Time 0.028 g / cm ³ 2.54 1.7 50 s 5.08 1.1 10 min. 6.62 0.9 15 min. 0.068 g / cm ³ 2.54 0.6 1.5 min. 5.08 0.1 ND 0.028 g / cm ³ oriented 2.54 1.7 1 min 5.08 1.2 6.6 min. 6.62 0.9 18 min. 9.16 0.1 20 min. and more

311 / B

The distribution material of the present invention, to be successful, should aspirate artificial menstrual fluids according to a horizontal tampon test to a distance of 2.5 cm (1 inch) in less than about 1.5 minutes. Materials that meet this performance criterion generally have a pore distribution with a high percentage ratio (mostly only 50%, preferably more than 60% and most preferably more than 70%) of a pore diameter of between about 80 and 400 µm and a specific gravity of less than about 0 , 15 g / cm ³ . It is believed that an increase in pore surface infiltration results in higher infiltration forces that can maintain fluid movement in smaller pores with higher resistive forces.

The personal care products of the present invention have been designed to have controlled final storage in the central region along the length of the insert. This functional behavior is highly desirable to prevent lateral leakage, which is predominantly a leak for sanitary napkins. This behavior is achieved by a layered absorbent which may contain three or more layers. The lowest layer, i. the layer furthest from the wearer, has larger dimensions in the x-y plane than the other layers above it. This creates an increasing topographic arrangement that increases the likelihood that the menstrual fluids from the wearer will enter a narrow strip as shown in FIG. 8. FIG. 8 shows a multilayer structure with the lowest layer 1, the top or inlet layer 3 and the middle layer 2.

The pores in each layer of material, in combination with the layer geometry, are designed to create a particular controlled fill strategy in the absorbent system. The average pore size in the second or middle layer is smaller than the average pore size in the top and bottom layers. It is assumed that the fluid is retained and distributed through the middle layer. The average pore size of the backsheet is larger than the middle layer, and is believed to prevent fluid transfer to the backsheet during product use. This limitation of the amount of fluid in the backsheet is critical to reduce leakage since it is believed that any fluid in this

311 / B of the widest layer may start to leak to the edge, causing lateral leakage. In addition, each layer is stabilized to help maintain the intended pore size during use and further to have the microscopical coherence necessary to shape the liner.

Alternatively, the backsheet may have a convex or thicker portion, such as lines in the direction of the axis, to help maintain fluid in the middle of the backsheet when high saturation induces transfer from the middle to the backsheet, as may occur after prolonged use. .

The topsheet, also called the acquisition layer, is the layer closest to the wearer and has a low specific gravity in the range of about 0.02 to 0.06 g / cm ³ and a base weight of about 25 g / m ² to about 125 g / m ² . This results in a pore diameter of from about 80 to about 1000 µm, which is very suitable for receiving viscous menstrual fluids.

The topsheet or acquisition layer may be manufactured in a number of ways. Examples include, but are not limited to, a bonded carded web of 100% synthetic fiber, or an airlaid mixture of cellulosic and synthetic bonding fibers.

The layer under the intake layer is intended for distributing and retaining fluids and it is called so-called. the distribution / retention layer or strip. It has a density in the range of about 0.1 g / cm ³ to about 0.2 g / cm ³ , but it must be higher in density than the acquisition layer. It is believed that such increased specific gravity aids desorption from the acquisition layer into the distribution / containment layer. The distribution / retention layer has a basis weight of from about 175 g / m ² to about 300 g / m ² and has an average pore diameter of from about 40 to about 500 µm. Materials suitable for this layer include air laid materials which are mixtures of high cellulosic fibers (80 to 95% by weight) with synthetic bonding fibers (5 to 20% by weight) that stabilize the web to provide this distribution function, but which is ensured by these fibers make this layer highly absorbent.

311 / B

The backsheet or liner-forming layer has a lower density than the distribution / retention layer. Its main function is to facilitate adherence to the body, ensure comfort to the wearer and ensure further encapsulation. Its specific gravity is from about 0.03 g / cm ³ to about 0.10 g / cm ³ , so that there is no readily desorption from the distribution / containment layer, resulting in the most liquid remaining. in the distribution / retention layer. In some embodiments, the liner-forming layer may be an air laid web of 80 to 90% by weight cellulose fine technical pulp blended with 10 to 20% by weight synthetic bonding fibers. While the main purpose is to shape the liner, this layer can retain fluid from the guide / restraint strip, especially when the guide / restraint strip is highly saturated with fluid. The liner-forming layer may also include protruding shapes such as lines, sine waves, miniature protrusions, etc.

Another aspect of the present invention is a liner forming feature wherein the uppermost two (acquisition and distribution / containment) layers may be slit in the longitudinal (longitudinal) direction, preferably in the middle, to allow bending when the backsheet begins to be compressed from the side. In this way, the liner closes close to the body, which is also important to reduce leakage.

It should be noted that in the invention the term object has "layers", which does not mean that the materials should be made separately and joined together. The term " layers " is also meant to include a single monolithic material in which the properties change in order to meet the functional and physical characteristics of the present invention. The material thus produced in one step, for example with characteristics varying from the upper to the lower regions to suit the requirements of the invention, is contemplated in the claims. A description of such materials can be found in the co-pending patent application filed on the same day as this patent application under representative file number 14002.

311 / B

The present invention may be modified according to various methods to provide functional advantages for a wide variety of product forms. Fig. Figures 9, 10, 11 and 12 illustrate examples of arrangement of components that make a very thin end product for users who prefer this type of end product. Fig. 9 shows an example of a wrapper that should touch the wearer, wherein the wrapper is about 80 mm wide in the middle, about 90 mm wide at its widest point, and about 238 mm long. Fig. 10 shows a reception layer that is about 37 mm wide and 218 mm long with an intermediate slot of about 101 mm long. Fig. 11 illustrates a distribution / retention layer with the same dimensions as the acquisition layer. Fig. 12 shows a backsheet or liner-shaped layer of generally the same shape as the cover layer, but with a width of 60 mm at the center and 70 mm at the widest point. The backsheet of FIG. 12 has five protruding lines of variable length, equidistant and centered on the liner. The layers of FIG. 10, 11 and 12 are further described in Table 1.

The following examples are provided to illustrate the distributive properties of the present invention.

Example 3

The nonwoven fabric was made of fine technical pulp and synthetic bonding fibers by air laying. Alternative examples of fine technical pulp include Coosa 054 made from 100% by weight of coniferous wood available from Kimberly-Clark Corporation, Weyerhauser NB416 or NF405 from 100% by weight of coniferous wood, Rayonier 9401 or any similar fine technical pulp with similar properties . The synthetic bonding fiber was a Hoechst-Celanese T-255 (H-C T-255) titer of 1.8-3 g per 9,000 m length. Any other binder that produces similar bonding properties of the mixture for the combination may be used.

The basis weights and specific weights are given in Table 1.

311 / B

Table 1

Fig. feature mixture Base weight g / m ² Specific gravity g / cm ³ 10 reception air laid 90/10 technical pulp / binder 100 0.1 11 distributing / retention air laid 90/10 technical pulp / binder 200 0.2 12 formation inserts, retention air laid 90/10 technical pulp / binder 175 0.1

Example 4

In the two-layer arrangement shown in FIG. 13, the top band 4 has a density range such that it can suck, distribute and retain menstrual fluids. The backsheet or liner-forming layer 5 has a lower specific gravity, thereby preventing the transfer of fluids into each other until the topsheet is fully saturated. This arrangement maintains the thinness required by some users. The properties of the layers of the example illustrated in FIG. 13 are as follows:

311 / B

feature mixture Weight g / m ² foundation Specific gravity g / cm ³ Input / Distribution / air laid 250 0.1 retention 90/10 liner shaping, air laid 175 0.05 retention 90/10

Example 5

In yet another embodiment, the absorbent system of the invention also provides coarse products for users that favor this form of article. Fig. 14 illustrates this type of four-layer arrangement, wherein the inlet layer 6 is above the distribution / containment layer 7, which is above the fluid-retarding strip 8 and finally the layer 9 forming the shape of the insert.

In this example and as shown in FIG. 14, the inlet layer 6 provides a reception function, while the next layer 7 is a guide / restraint strip with a higher density. The third layer 8 has a lower density than the spreader / restraint strip 7 and therefore provides delay in the transfer of fluids to the wider and thicker liner-forming layer 9, which also provides comfort and thickness requirements for this product area. Preventing fluid from entering the widest layer reduces the chances of leakage to the edges that cause leakage. The liner-forming layer 9 may have protruding patterns to prevent fluid from leaking to the sides after the fluid has penetrated the delay layer 8 after prolonged use of the article.

While these three examples will help illustrate the invention, the present invention is not limited thereto. The present invention encompasses absorbent articles that maintain the controlled downward placement of fluids in the center of the absorbent system to prevent side leaks.

311 / B

The following test values show controlled fill patterns for a number of examples of absorbent systems. In the following description, "topsheet" means the acquisition layer, "middlesheet" means the distribution / containment layer, and "bottomsheet" means the layer forming the shape of the insert. The test procedure involves assembling parts of the absorbent system and exposing it to 10 ml at 10 ml / h of menstruation simulans, as described in detail in the "Test Methods" section above.

Two fluid intake systems were tested. These results are plotted graphically in FIG. 15 where system I is on the left and system II on the right. In FIG. 15, the first column is a topsheet for each system, the second is a distribution / containment layer, and the third is a layer that forms the shape of the insert. The y-axis gauge is the fluid intake in grams. The aspiration systems were made of Coosa technical pulp and synthetic fibers described in detail above and briefly summarized below. It should also be noted that any of the following tables referring to the "watch glass" shape means that the backsheet is thus shaped, with the other layers being rectangular in shape.

Description of fluid intake systems System I

layer top Prostredná lower Base weight 100 g / m ² 200 g / m * 175 g / m * % technical pulp 90% Coosa 0054 90% Coosa 0054 90% Coosa 0054 % binder 10% 2.8 d H-C T-255 10% 2.8 d H-C T-255 10% 2.8 d H-C T-255 Specific weight 0.10 g / cm ³ 0.20 g / cm ³ 0.10 g / cm ³ Dimensions mm 38x152 38x152 hour glass - 60 mm depth. oval 70 x 218mm

311 / B

System II

layer top Prostredná lower Base weight 125 g / m ² 250 g / m ² 250 g / m ² % technical 90% Rayonier 90% Rayonier 90% Rayonier pulp 9401 9401 9401 % binder 10% 1.7 d 10% 1.7 d 10% 1.7 d DANAKLON DANAKLON DANAKLON Specific weight 0.10 g / cm ³ 0.20 g / cm ³ 0.10 g / cm ³ Dimensions mm 38x152 38x152 hour glass - 60 mm depth. oval 70 x 218mm

The columns of FIG. 15 means the mean values of absorbed fluid from the original values. The original values for the graph in FIG. 15 are shown below.

311 / B

Fluid intake values

Dry weight - layers Wet weight - layers Absorbed fluid - layers top Central lower top Central lower top Central lower System I. 1 0.66 1.37 2.56 2.02 6.81 5.21 1.36 5.44 2.65 2 0.63 1.34 2.37 2.00 6.98 4.73 1.37 5.64 2.36 3 0.59 1.30 2.73 1.78 5.98 6.02 1.19 4.68 3.29 average 0.63 1.34 2.55 1.93 6.59 5.32 1.31 5.25 2.77 System II. 1 0.64 1.55 3.19 2.45 5.82 7.02 1.81 4.27 3.83 2 0.65 1.70 3.45 2.32 5.96 7.30 1.67 4.26 3.85 3 0.64 1.61 3.26 1.99 6.41 6.77 1.35 4.80 3.51 4 0.64 1.67 3.52 1.98 6.17 7.33 1.34 4.50 3.81 5 0.72 1.58 3.33 2.32 6.17 6.64 1.60 4.59 3.31 6 0.68 1.52 3.50 1.92 6.09 7.05 1.24 4.57 3.55 average 0.66 1.61 3.38 2.16 6.10 7.02 1.50 4.50 3.64

The blot size ratio is useful in describing parts and systems of the present invention. The spot size ratio is defined as the spot width (w) divided by the spot length (d) after reaching the spot equilibrium. The liner-forming layer and the distribution / retention layer must have a spot size ratio of less than or equal to 0.5, preferably 0.375, and most preferably 0.1875. Samples with a length of 22 cm (8.7 inch) for the liner-forming layer and 15.24 cm (6 inch) for the distribution / containment layer were tested. It should be noted that longer or shorter products with these ratios are within the scope of the invention. Below is a description of each layer of the test system, and the values immediately follow the description. Note that system I is the same as the previous system I.

311 / B

Composition of spot length systems System I

layer top Prostredná lower Base weight 100 g / m ² 200 g / m ² 175 g / m ² % technical 90% Coosa 90% Coosa 90% Coosa pulp 0054 0054 0054 % binder 10% 2.8 d 10% 2.8 d 10% 2.8 d H-C T-255 H-C T-255 H-C T-255 Specific weight 0.10 g / cm ³ 0.20 g / cm ³ 0.10 g / cm ³ Dimensions mm 38 x 152 38x152 hour glass - 60 mm depth. oval 70 x 218mm

System III

layer top Prostredná lower Base weight 25 g / m ² 175 g / m ² 200 g / m ² % technical 90% Coosa 90% Coosa pulp 0054 0054 % binder 100% 3.0 d 10% 2.8 d 10% 2.8 d Chisso ESC- H-C T-255 H-C T-255 Specific weight 0.03 g / cm ³ 0.20 g / cm ³ 0.10 g / cm ³ Dimensions mm 38x152 38x152 hour glass - 60 mm depth. oval 70 x 218mm

311 / B

Spot length and spot ratio values

Length of the stain Speck width Spot ratio top Central lower top Central lower top Central lower System I. 1 4.70 5.80 5.30 3.8 3.8 3.8 0.32 0.26 0.28 2 4.70 5.80 5.70 3.8 3.8 3.8 0.32 0.26 0.26 3 5.20 5.90 5.70 3.8 3.8 3.8 0.29 0.25 0.26 average 4.87 5.83 5.57 3.8 3.8 3.8 0.31 0.26 0.27 System III. 1 1.40 6.00 6.00 3.8 3.8 3.8 1.07 0.25 0.25 2 1.40 6.00 6.00 3.8 3.8 3.8 1.07 0.25 0.25 3 1.40 6.00 5.70 3.8 3.8 3.8 1.07 0.25 0.26 average 1.40 6.00 5.90 3.8 3.8 3.8 1.07 0.25 0.25

The stain width for all samples was 3.8 cm (1.5 inch).

In addition to the blot length ratio, the saturation profile for the middle or distribution / retention layers is important. The saturation profile determines the location of the fluid along the length of the layer. To determine the saturation profile, the guide / restraint strip may be divided into six sections of equal length, as shown:

311 / B

The ratio is obtained as (C + D) divided (A + F). This corresponds to the amount of fluid (in grams) in the approximate middle third of the product divided by the sum of the amount of fluid in the end sixths of the product. If the distribution / retention layer tested is not rectangular as in this case, the product should be distributed so that the dry weight of each part is approximately the same. The ratio of saturation profiles in the present invention must be at most about 4, preferably less than about 2, preferably about less than 1.6 or less, and most preferably less than 1.4 (using six portions). Examples of materials used to test the saturation profiles and the results of these tests are given below.

Systems description for saturation profiles

System I

layer top Prostredná lower Base weight 100 g / m ² 200 g / m ² 175 g / m ² % technical 90% Coosa 90% Coosa 90% Coosa pulp 0054 0054 0054 % binder 10% 2.8 d 10% 2.8 d 10% 2.8 d H-C T-255 H-C T-255 H-C T-255 Specific weight 0.10 g / cm ³ 0.20 g / cm ³ 0.10 g / cm ³ Dimensions mm 38x152 38 x 152 hour glass - 60 mm depth. oval 70 x 218mm

311 / B

System IV

layer top Prostredná lower Base weight 100 g / m ² 175 g / m ² 200 g / m ² % technical 90% Coosa 90% Coosa 90% Coosa pulp 0054 0054 0054 % binder 10% 2.8 d 10% 2.8 d 10% 2.8 d H-C T-255 H-C T-255 H-C T-255 Specific weight 0.10 g / cm ³ 0.20 g / cm ³ 0.10 g / cm ³ Dimensions mm 38 x 152 38x152 hour glass - 60 mm depth. oval 70 x 218mm

System V

layer top Prostredná lower Base weight 100 g / m ² 200 g / m ² 200 g / m ² % technical 94% Coosa 94% Coosa 94% Coosa pulp 0054 0054 0054 % binder 6% 2.8 d 6% 2.8 d 6% 2.8 d H-C T-255 H-C T-255 H-C T-255 Specific weight 0.10 g / cm ³ 0.20 g / cm ³ 0.10 g / cm ³ Dimensions mm 38 x 152 38x152 hour glass - 60 mm depth. oval 70 x 218mm

311 / B

Medium Layer Saturation Profiles System I

Section A B C D E F ratio (C + D) / (A + F) 1 2.24 4.30 4.34 4.30 4.17 3.47 1.51 2 2.85 4.60 4.60 4.51 4.51 2.81 1.61 3 1.40 4.03 4.54 4.58 4.35 1.17 3.55 average 2.16 4.31 4.49 4.46 4.34 2.48 2.22

System IV

Section A B C D E F ratio (C + D) / (A + F) 1 2.83 3.91 4.04 3.85 3.60 1.74 1.73 2 2.61 4.25 4.39 4.39 4.32 2.89 1.60 3 2.47 4.05 3.99 4.24 4.05 2.85 1.55 average 2.64 4.07 4.14 4.16 3.99 2.49 1.62

311 / B

System V

Section A B C D E F Ratio (C + D) / (A ⁺ F) 1 3.32 3.94 4.09 4.28 4.23 2.94 1.34 2 3.20 3.77 3.91 4.06 4.15 2.87 1.31 3 3.61 4.33 4.57 4.47 4.04 2.07 1.59 average 3.38 4.01 4.19 4.27 4.14 2.63 1.41

The configuration for a strong product was also tested for saturation profiles. Design information and saturation ratios are given below.

System I

layer top second The third lower Basic mass 100 g / m ² 250 g / m ² 100 g / m ² 470 g / m ² % technical 90% Coosa 90% Coosa 90% Coosa 100% Coosa pulp 0054 0054 0054 0054 % binder 10% 2.8 d H-C T-255 10% 2.8 d H-C T-255 10% 2.8 d H-C T-255 0% Specific weight 0.06 g / cm ³ 0.12 g / cm ³ 0.06 g / cm ³ Dimensions mm 38 x 152 38x152 hour glass -60 mm depth. oval 70 x 218mm 200 mm long

311 / B

Saturation profile values

condition A B C D E C / A C / E 1 4.04 6.69 6.35 6.24 2.99 1.57 2.12 2 2.62 6.17 6.36 6.07 3.67 2.42 1.73 average 3.33 6.43 6.35 6.15 3.33 2.00 1.93

Example 5 above describes a sanitary napkin with a delayed transmission function. In Example 5, the delay material has a lower specific gravity than the lower layer and therefore delays the transfer of fluids to the lower layer. Although the specific gravity of the material, density is only one way to cause a delay in fluid transfer, other properties of the material may also cause a delay in fluid transfer. Other suitable delayable materials include fabrics such as nonwoven fabrics, composite nonwoven fabrics or bonded carded webs. Perforated sheets may also be used in absorbent systems to provide this function.

Although both nonwoven fabrics and films can be used as the delay-inducing materials, they are preferably non-wettable. In the case of nonwoven fabrics, composite nonwoven fabrics and films, the structures used in the following examples are somewhat "flat". In other words, they need not have a lower specific gravity than the layer in the absorbent system below them. Their function is a particularly occlusive, hydrophobic layer that only begins to transfer fluid after the layer becomes very high saturated.

In the example that uses a bonded carded web, the transmission delay also works best when the web is hydrophobic. However, in this material both density and hydrophobicity play a role in the delayed transfer.

311 / B

The following examples include six thin absorbent systems and seven coarse absorbent systems that use different materials that delay transmission. Test results show that by using these materials better saturation profile ratios are achieved and in some cases better spot length ratios can be achieved compared to the original arrangements based on specific gravity / pore size gradients.

Although certain materials have been used for the resulting testing, other hydrophobic materials or materials that are hydrophobic in combination with a lower specific gravity than the material below them may also provide a transfer delay function.

Another aspect of these values is that all the previous values used the distribution of the distribution strip into six equal parts, and this was the method used further in the claims. The following values divide the strips into five equal parts, as shown below, which means that the dirt point is not exactly on the dividing line between the two parts. Saturation profiles can be calculated from both sets of values. If five parts are used, the saturation profile used is calculated as the ratio of the amount of fluid in the middle portion to the sum of the amount in the extreme portions.

Saturation profile of a thin system with a transmission delay layer

A B C D LU

C ((A + E) / 2)

Top layer saturation profiles (g / g)

311 / B

System 1

Section A B C D E ratio C / ((A + E) / 2) 1 5.58 5.85 5.68 6.15 5.51 1,024 2 5.48 5.82 5.51 5.26 5.19 1,032 average 5.53 5.83 5.59 5.70 5.35 1,028

System 2

Section A B C D E ratio C / ((A + E) / 2) 1 5.90 5.97 6.01 5.65 5.62 1,043 2 5.04 5.36 5.56 5.23 5.07 1,099 average 5.47 5.67 5.78 5.44 5.35 1,071

System 3

Section A B C D E ratio C / ((A + E) / 2) 1 5.51 5.88 5.68 5.58 5.58 1,024 2 5.70 5.81 5.81 5.84 5.35 1,052 average 5.61 5.84 5.74 5.71 5.47 1,038

311 / B

System 4

Section A B C D E ratio C / ((A + E) / 2) 1 4.99 6.41 5.74 5.88 5.42 1,103 2 5.57 6.03 5.68 5.96 5.47 1,028 average 5.28 6.22 5.71 5.92 5.44 1,066

System 5

Section A B C D E ratio C / ((A + E) / 2) 1 4.51 5.68 5.75 5.50 5.28 1,174 2 4.87 5.63 5.63 5.92 5.34 1,102 average 4.69 5.65 5.69 5.71 5.31 1,138

System 6

Section A B C D E ratio C / ((A + E) / 2) 1 5.88 6.06 6.38 5.91 5.81 0,874 2 5.78 6.37 6.04 6.15 6.30 1,000 average 5.83 6.21 6.21 6.03 6.05 0,937

311 / B

Spot length ratio of thin system with transmission delay layer V = top layer P = middle layer S = bottom layer

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 1 1 6.00 NN 3.30 1.5 NN 1.5 0.25 NN 0.45 2 6.00 NN 2.00 1.5 NN 1.5 0.25 NN 0.75 average 6.00 NN 2.65 1.5 NN 1.5 0.25 NN 0.60

Length of the stain Speck width W / L ratio layer in P WITH IN P WITH IN P WITH System 2 1 6.00 NN 2.6 1.5 NN 1.5 0.25 NN 0.58 2 6.00 NN 4.30 1.5 NN 1.5 0.25 NN 0.35 average 6.00 NN 3.45 1.5 NN 1.5 0.25 NN 0.47

311 / B

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 3 1 6.00 NN 0.90 1.5 NN 1.5 0.25 NN 1.67 2 6.00 NN 2.10 1.5 NN 1.5 0.25 NN 0.71 average 6.00 NN 1.50 1.5 NN 1.5 0.25 NN 1.19

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 4 1 6.00 NN 1.50 1.5 NN 1.5 0.25 NN 1.00 2 6.00 NN 1.40 1.5 NN 1.5 0.25 NN 1.07 average 6.00 NN 1.45 1.5 NN 1.5 0.25 NN 1.03

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 5 1 5.80 NN 4.90 1.5 NN 1.5 0.26 NN 0.31 2 6.00 NN 4.10 1.5 NN 1.5 0.25 NN 0.37 average 5.90 NN 4.50 1.5 NN 1.5 0.25 NN 0.34

311 / B

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 6 1 6.00 NN 0.00 1.5 NN 1.5 0.25 NN 00 2 6.00 NN 0.00 1.5 NN 1.5 0.25 NN 00 average 6.00 NN 0.00 1.5 NN 1.5 0.25 NN 00

All thin systems consist of.

layer top Prostredná lower Base weight 250 g / m ² See description below 175 g / m ² % technical pulp 90% Weyerhauser NB416 88% Weyerhauser NB416 % binder 10% 2.8 d H-C T-255 12% 2.8 d H-C T-255 Specific weight 0.14 g / cm ³ 0.08 g / cm ³ Dimensions mm 38 x 140 52 x 154 hour glass - 60 mm depth. 70 x 200 oval mm

311 / B

Middle delay layer for the systems described above:

System 1: 27 g / m ² (0.8 axis), 2.2 g / 9000 m, polypropylene spinning bundled fibers.

System 2: 34 g / m ² (1.0 axis), 2.2 g / 9000 m, polypropylene spinning bundled fibers.

System 3: 27 g / m ² (1.0 axis), 2.0 g / 9000 m, polypropylene / polyethylene composite fiber.

System 4: 51 g / m ² (1.5 axis), 2.0 g / 9000 m, polypropylene / polyethylene composite fiber.

System 5: 0.0254 mm (1.0 mil), perforated polyethylene film.

System 6: 50 g / m ² , bonded carded fleece.

Top layer saturation profiles (g / g)

A B C D E

C / ((A + E) / 2) System 1

A B C D E ratio C / ((A + E) / 2) 1 6.48 7.90 8.10 8.05 7.38 1.16 2 6.43 7.81 8.24 8.00 4.76 1.47 average 6.45 7.86 8.17 8.02 6.07 1.32

311IB

System 2

A B C D E ratio C / ((A + E) / 2) 1 7.24 7.90 8.24 8.05 7.52 1.12 2 6.98 8.13 8.09 8.18 7.46 1.12 average 7.11 8.02 8.16 8.12 7.49 1.12

System 3

A B C D E ratio C / ((A + E) / 2) 1 6.79 8.86 8.01 7.87 7.51 1.12 2 7.99 8.66 8.71 8.71 8.28 1.12 average 7.39 8.76 8.36 8.29 7.90 1.12

System 4

A B C D E ratio C / ((A + E) / 2) 1 7.59 8.22 7.93 8.66 8.17 1.00 2 8.01 8.55 8.11 8.50 7.91 1.02 average 7.80 8.39 8.02 8.58 8.04 1.01

311 / B

System 5

A B C D E ratio C / ((A + E) / 2) 1 0.31 6.62 7.04 6.43 3.44 3.75 2 0.12 5.29 7.35 7.04 2.26 6.17 average 0.21 5.96 7.19 6.73 2.85 4.96

System 6

A B C D E ratio C / ((A + E) / 2) 1 5.31 5.35 5.22 5.03 5.57 0.96 2 4.82 5.27 5.01 5.11 5.27 0.99 average 5.07 5.31 5.12 5.07 5.42 0.98

System 7

A B C D E ratio C / ((A + E) / 2) 1 3.65 5.94 6.33 6.22 3.51 1.77 2 3.65 6.11 6.15 6.15 2.49 2.00 average 3.65 6.03 6.24 6.19 3.00 1.89

311 / B

Staining ratios of coarse systems with a transmission delay layer

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 1 1 6.00 NN 3.20 1.5 NN 1.5 0.25 NN 0.47 2 5.60 NN 3.80 1.5 NN 1.5 0.27 NN 0.39 average 5.80 NN 3.50 1.5 NN 1.5 0.26 NN 0.43

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 2 1 6.00 NN 1.50 1.5 NN 1.5 0.25 NN 1.00 2 6.00 NN 2.50 1.5 NN 1.5 0.25 NN 0.60 average 6.00 NN 2.00 1.5 NN 1.5 0.25 NN 0.80

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 3 1 6.00 NN 0.50 1.5 NN 1.5 0.25 NN 3.00 2 6.00 NN 1.50 1.5 NN 1.5 0.25 NN 1.00 average 6.00 NN 1.00 1.5 NN 1.5 0.25 NN 2.00

311 / B

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 4 1 6.00 NN 1.50 1.5 NN 1.5 0.25 NN 1.00 2 6.00 NN 1.00 1.5 NN 1.5 0.25 NN 1.50 average 6.00 NN 1.25 1.5 NN 1.5 0.25 NN 1.25

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 5 1 5.30 NN 4.20 1.5 NN 1.5 0.28 NN 0.36 2 4.60 NN 3.70 1.5 NN 1.5 0.33 NN 0.40 average 4.95 NN 3.95 1.5 NN 1.5 0.31 NN 0.38

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 6 1 6.00 NN 0.50 1.5 NN 1.5 0.25 NN 3.00 2 6.00 NN 0.70 1.5 NN 1.5 0.25 NN 2.14 average 6.00 NN 0.60 1.5 NN 1.5 0.25 NN 2.57

311 / B

Length of the stain Speck width W / L ratio layer IN P WITH IN P WITH IN P WITH System 7 1 4.7 4.4 2.0 1.5 1.5 1.5 0.32 0.34 0.75 2 4.8 3.7 1.7 1.5 1.5 1.5 0.31 0.41 0.88 average 4.75 4.05 1.85 1.5 1.5 1.5 0.31 0.38 0.82

All coarse systems consist of:

layer top Prostredná lower Base weight 250 g / m ² See description below 435 g / m ² % technical pulp 90% Weyerhauser NB416 100% Coosa 0054 with bulges in the shape sinusoidal % binder 10% 2.8 d H-C T-255 0% Specific weight 0.12 g / cm ³ 0.08 g / cm ³ Dimensions mm 38 x 140 52 x 154 hour glass - 60 mm HLB. oval 70 x 200 mm

311 / B

Middle delay layer for the systems described above:

System 1: 27 g / m ² (0.8 axis), 2.2 g / 9000 m, polypropylene spinning bundled fibers.

System 2: 34 g / m ² (1.0 axis), 2.2 g / 9000 m, polypropylene spinning bundled fibers.

System 3: 27 g / m ² (1.0 axis), 2.0 g / 9000 m, polypropylene / polyethylene composite fiber.

System 4: 51 g / m ² (1.5 axis), 2.0 g / 9000 m, polypropylene / polyethylene composite fiber.

System 5: 0.0254 mm (1.0 mil), perforated polyethylene film.

System 6: 50 g / m ² , bonded carded fleece.

System 7: made by air laying, 100 g / m ² , 0.03 g / cm ³ , 50/50 mixture of Weyerhauser NB 416 technical pulp and HC T-255 bonding fibers.

The personal care product arrangement of the present invention includes female sanitary napkins with a lining on the side of the body, a distribution / retention layer, a transfer delay layer, a layer that shapes the insert or the second absorbent layer, and a backsheet. The materials may be joined together by a variety of means including adhesive bonding, mechanical and thermal bonding means.

The lining may be a nonwoven fabric or a laminated nonwoven fabric or film. In the case of a layered arrangement, the liner must be perforated in some way to allow the passage of fluids. A satisfactory nonwoven fabric for such layering is made of air-bonded low density polypropylene / polyethylene composite fibers, a 50/50 core / sheath concentric fiber from 6 to 10 g / 9000 m having a finish providing increased wicking. Suitable nonwoven fabrics may have a specific gravity of about 0.03 g / cm ³ and a basis weight of about 24 g / m ² (0.7 axis). A suitable film for such layering is available from Edison Plastics, which is

311 / B film containing 94% low density polyethylene Rexene ^(R) with a melt index of 5.5 and a specific gravity of 0.923 g / cm ³ and 6% Ampacet ^(R) titanium dioxide concentrate. The film and the nonwoven web may be laminated with a thermal bonding pattern having, for example, from 8 to 12% of the bonded area and about 27% of the open area for fluid passage.

This lining may be bonded to the distribution / retention layer with an adhesive such as National Starch NS34-5610 or equivalent applied in an amount of about 5 g / m ² . Of course, any other adhesive or other bonding method must not obstruct fluid flow between the layers.

The distribution / retention layer can be made by air laying and contains, for example, 90% NB-416 or NF-405 technical pulp from Southern coniferous wood from Weyerhauser and 10% T-255 polyethylene terephthalate-copolyolefin from Hoechst-Celanese, 50/50 concentric core / sheath fiber, 2.8 g titer at 9000 m length. The base weight of the distribution layer may be about 250 g / m ² with a density of about 0.14 g / m ² . This distribution / retention layer can be cut longitudinally as described above, so that the product will be arched upwards in use, improving body comfort. These slits may be integral or intermittent and may be placed on the middle of the article.

A suitable transfer delay-inducing layer may be a fabric made by, for example, a centrifugal bonding process of polyolefin fibers, such as polypropylene, at a basis weight of about 27 g / m ² (0.8 axis) with a titer of 2.7 g per 9,000 m length. This layer may be larger in the x-y plane than the distribution layer and may be of a color other than white to warn the wearer that the liquid has reached the edges of the distribution / containment layer. For example, the color may be pink to provide an aesthetic appearance to the article.

When the fluid retention in the distribution / containment layer is maximally and / or the product is subjected to a compressive force, the delay layer should allow the fluid to move in the z-direction (downward) into the liner-forming layer.

311 / B

The liner-forming layer or secondary absorbent layer should be made of the same material in the same ratio as the distribution layer, but with a lower density, for example about 0.08 g / cm ^3, and a lower basis weight, for example 175 g / m ² . A suitable liner-forming layer may have a protruding pattern in the longitudinal direction, which may serve as a channel and direct the fluid in the longitudinal direction so that it does not tend to leak on its sides and may improve body comfort.

Another, also suitable liner-forming layer may have two layers of technical pulp. One such layer may have a specific gravity of 500 g / m ² and may be 100% technical pulp of southern coniferous wood, such as Coosa 0054, Weyerhauser NB-416 or NF-405 or Georgia Pacific Golden Isles, 4821 technical fabric with a length of about 200 mm and a width of from about 60 to 70 mm and may have, for example, a sinusoidal pattern as shown in FIG. 16 or other longitudinal protruding pattern. The second layer may have a density of 400 g / m ² and be of the same material with a length of about 160 mm and a width of about 45 mm and may be provided with corners or other protruding pattern.

The liner-forming layer may be adhered to the backing or separating layer with an adhesive such as National Starch NS 345410 in an amount of less than about 15 g / m ² .

The backing or separating layer of the article may be made of a 0.025 mm thick low density polyethylene film such as Edison Plastic's XP 746A pink with a protruding pattern of very small dimensions. Likewise, any other color can be selected for the bottom.

A more detailed description of the method and apparatus used to manufacture the present invention can be found in co-pending co-pending patent application number 13817.

As mentioned above, the entire material may be provided with a protruding pattern, preferably from the side of the body lining. The protrusion may be so fine that it only prints the lining from the side of the body, or it may also include other layers. The protruding pattern can be selected to maximize material densification,

311 / B which enhances fluid uptake and dispersion in the product and distributes fluid along the front-to-back axis. The performance may also provide visual signaling to the wearer that the full capacity of the article has already been reached and should be postponed and may also be used to obtain an aesthetic advantage. Examples of protruding patterns are shown in the figures. Fig. 16 is a protruding pattern for personal care products referred to as a sinus wave pattern; and FIG. 17 is a protruding pattern for personal care products referred to as a packaging pattern.

It is clear that female personal care systems such as female sanitary articles with the features required in the present invention result in a fairly good distribution of fluids. With such a spread, the entire product can be better utilized before leaking and leads to excellent wearer comfort.

Although only a few exemplary embodiments of the present invention have been described in detail above, one skilled in the art will readily recognize that many exemplary modifications are possible without materially departing from the new data and advantages of the invention. Therefore, all such modifications are intended to be included within the scope of the invention as defined by the following claims. It is intended in the claims that the members together with the functional claims cover the arrangement described herein as members performing the aforementioned functions and not only equivalent to the arrangement but also equivalent to the function. Just as the nail and screw cannot be structurally equivalent in that the nail uses a cylindrical surface to connect the wooden parts to each other, while the screw uses spiral surfaces in the wood joining environment, the nail and the screw may have equivalent structures.

Claims (46)

PATENT CLAIMS 1. Distributor material for personal protection products, characterized in that it comprises a flat fabric which soaks up artificial menstrual fluids according to a horizontal suction test to a distance of at least 2.54 cm (1 inch) in less than about 1.5 min. The distribution material of claim 1, wherein said fabric has a specific gravity of less than about 0.15 g / cm ³ . Distributor material according to claim 1, characterized in that the material has more than 50% pores with a diameter of about 80 to 400 µm. Distributor material according to claim 1, characterized in that the material has more than 60% pores with a diameter of about 80 to 400 µm. Distributor material according to claim 1, characterized in that the material has more than 70% pores with a diameter of about 80 to 400 µm. 6. A sanitary napkin comprising a fabric according to claim 1. Distributor material according to claim 1, characterized in that the material comprises composite fibers. Distributor material according to claim 1, characterized in that the material is stabilized. 9. A personal protection system product comprising a diverting / containment layer and a liner-forming layer, each layer having a soiling length ratio of 0.5 or less and said diverting / containment layer having a saturation profile of 4 or less. 31,311 / B 10. A personal protection system product according to claim 9, wherein the distribution / retention layer and the liner-forming layer have a stain length ratio of 0.375 or less. 11. The personal protection system product of claim 9, wherein the distribution / retention layer and the liner-forming layer have a stain length ratio of 0.1875 or less. A personal protection system product according to claim 9, characterized in that the distribution / containment layer has a saturation profile ratio of 2 or less. A personal protection system product according to claim 9, wherein the distribution / containment layer has a saturation profile ratio of 1.4 or less. The personal protection system product of claim 9, wherein the distribution / containment layer has a density in the range of about 0.1 g / cm ³ to about 0.2 g / cm ³ . The personal protection system article of claim 14, wherein the distribution / containment layer has a basis weight in the range of about 175 g / cm ² to 300 g / m ² . The personal protection system article of claim 9, wherein the lining layer has a density in the range of about 0.03 g / cm ³ to about 0.1 g / cm ³ . 17. The personal protection system product of claim 9, wherein the liner-forming layer has a pore size greater than the distribution / containment layer. 31,311 / B 18. The personal protection system product of claim 9, further comprising an acquisition layer. 19. The personal protection system product of claim 18, wherein the liner-forming layer has a pore size larger than the distribution / retention layer, which has a smaller pore size than said acquisition layer. Personal protection system product according to claim 18, characterized in that the layers are areas of monolithic materials. 21. The personal protection system product of claim 18, wherein at least one of said layers is slit. The personal protection system product of claim 18, wherein the at least one layer is made according to a method selected from the group consisting of air laid, wet laid and carded web bonding. 23. The personal protection system product of claim 22, wherein the at least one layer is made of materials selected from the group consisting of cellulose fibers, foams, synthetic fibers, and mixtures thereof. 24. The personal protection system article of claim 18, further comprising a fluid transfer delay layer. 25. The personal protection system product of claim 18, wherein the at least one layer is embossed. 26. The personal protection system product of claim 25, wherein the liner-forming layer is extruded in the form of a sinusoid. 31,311 / B 27. The personal protection system product of claim 25 wherein all layers are embossed in the form of a packaging pattern. 28. A feminine hygiene product comprising the system of claim 9. 29. The feminine hygiene article comprising a reception layer having a density of between about 0.02 and about 0.06 g / cm ³ , a basis weight of between about 25 and about 125 g / m ² and a pore size of about 80 up to about 1000 µm and at least one lengthwise cut on the device, a distribution / retention layer having a density of about 0.1 to about 0.2 g / cm ³ , a basis weight of between about 175 and about 300 g / m ² , size pores between about 40 and about 500 µm and at least one slit along the length disposed on the device, and a layer-forming insert that is extruded having a density of between about 0.03 to 0.2 g / cm ³ 30. A feminine hygiene article comprising a body-side lining, a distribution / retention layer, a transfer delay layer, a liner-forming layer, and a backsheet, said lining selected from the group consisting of nonwoven fabrics and perforated nonwoven laminates. said web / sheet, said distribution / retention layer being adhesively bonded to the lining layer and comprising technical pulp and bonding fibers, said transfer retarding layer comprising a nonwoven web made of polyolefin fibers which is longer in the xy plane than the distribution / retention layer and has a color treatment to warn the wearer when the liquid has reached the edge of the distribution / containment layer, 31,311 / B, said liner-forming layer is extruded into a channel-like pattern and directs fluid in the longitudinal direction, and said backsheet comprises a low-density film adhesively bonded to said liner-forming layer, said distribution / retention layer and liner-forming layer it has a soiling length ratio of 0.5 or less and the distribution / retention layer has a saturation profile of 4 or less. 31. The feminine hygiene article of claim 30, wherein said lining is a lamination of 50/50 polypropylene / polyethylene low viscosity core / sheath concentric configurations having a titer thickness of from about 6 to 50 10 g over 9000 m length, wherein the nonwoven fabric has a density of about 0.03 g / cm ³ and a basis weight of about 24 g / m ² (0.7 axis) and the film contains about 94% low density polyethylene with an index a melt flow of about 5.5 and a specific gravity of about 0.9 g / cm ³ and 6% titanium dioxide concentrate. 32. The feminine hygiene product of claim 31 wherein said lining is a laminate and a nonwoven fabric and is formed with a thermal bonding pattern having from about 8 to 12% of the bonding area and is perforated to provide about 27% of the open area to the passing fluids. The feminine hygiene article of claim 30, wherein said lining is attached to the distribution / retention layer by an adhesive applied in an amount of about 5 g / m ² . 34. The feminine hygiene product of claim 30, wherein said distribution / containment layer is air laid and comprises about 90% technical pulp of coniferous wood and 10% polyethylene terephthalate copolyolefin 50/50 core / sheath, concentric 31,311 / B configurations, with a titer of 2.8 g per 9,000 m of length, wherein the distribution / containment layer has a basis weight of about 250 g / m ² and a specific gravity of 0.14 g / cm ³ . 35. The feminine hygiene product of claim 34, wherein said distribution / containment layer is slit longitudinally such that the product will be arched upward in use to improve body comfort. 36. The feminine hygiene product according to claim 35, wherein said slits are integral or intermittent and are disposed on the middle of the article. The feminine hygiene product of claim 30, wherein the transfer delay layer is a centrifugally bonded polyolefin fiber web having a titer of about 2.7 g per 9,000 m length and wherein said web has a basis weight of about 27 g / m ² (0). , 8 axis). 38. The feminine hygiene product of claim 37, wherein the transfer delay layer has a color other than white. 39. The feminine hygiene product according to claim 30, wherein said liner-forming layer is air laid and comprises about 90% technical pulp of coniferous wood and 10% polyethylene terephthalate copolyolefin 50/50 core / sheath, concentric a titre of 2.8 g per 9000 m of length, wherein the distribution / containment layer has a basis weight of about 175 g / m ² and a specific gravity of about 0.8 g / cm ³ . The feminine hygiene product of claim 30, wherein said liner-forming layer comprises two layers of technical pulp, the first layer comprises about 500 g / m ^{2 of} technical pulp of coniferous wood, and has an embossed sinusoidal pattern and the second layer comprises about 400 g / m ^{2 of} technical pulp from coniferous wood and is embossed in a pattern. 31,311 / B The feminine hygiene product according to claim 30, wherein the backsheet is a 0.0254 mm thick low density polyethylene film. 42. The feminine hygiene product of claim 30, wherein the backsheet is pink colored. 43. A feminine hygiene product comprising a body-side lining, a distribution / retention layer, a liner-forming layer, and a backsheet, said lining being a lamination of 50/50 low-viscosity, bonded, 50/50 polypropylene / polyethylene low fiber composite fibers a core / shell density of 50/50 concentric arrangement having a titre of about 6 to 10 g per 9000 m length, wherein the nonwoven fabric has a density of about 0.03 g / cm ³ and a basis weight of about 24 g / m ² (0 (7 axis) and the film comprises about 94% low density polyethylene having a melt index of about 5.5 and a specific gravity of about 0.9 g / cm ³ and a 6% titanium dioxide concentrate layered with a thermal bond pattern of from about 8 to 12% of the mating surface and is perforated to provide about 27% of the open area for fluid passage, said distribution / retention layer being adhesively bonded to said lining and produced air-cooled and contains about 90% technical pulp of coniferous wood and 10% polyethylene terephthalate copolyolefin 50/50 core / shell type, concentric arrangement, with a titer of 2,8 g per 9000 m length, where the distribution / retention layer has a a basis weight of about 250 g / m ² and a specific gravity of 0.14 g / cm ^3, and wherein said distribution / containment layer has an interruption or continuous cut in the middle, said insert forming layer is air laid and comprises a web having about 90% technical pulp made of coniferous wood and 10% core / sheath 50/50 polyethylene terephthalate copolyolefin, 31,311 / B concentric arrangement, with a titre of 2.8 grams per 9,000 m in length, with a basis weight of about 175 grams / m ² and a specific gravity of 0.8 grams / cm ³ with longitudinal extrusion into the channel shape and directs the fluid in the longitudinal axis the backsheet comprises 0.0254 mm of low density polyethylene film pink colored adhesively bonded to said liner-forming layer. 44. The feminine hygiene article of claim 43, further comprising a transfer delay layer between said distribution / restraint layer and said insert-forming layer comprising a centrifugally shaped web of fabric larger in the x-y plane than said distribution / restraint layer and comprises a polyolefinic layer. fibers having a titer of about 2.7 g per 9000 m length and wherein said web has a basis weight of about 27 g / m ² (0.8 axis) and the color is other than white. 45. A feminine hygiene article comprising a body-side lining, a distribution / retention layer, a liner-forming layer, and a backsheet, said lining being layered with a 50/50 low density, 50/50 polypropylene / polyethylene, infiltrated, composite fiber web. a core / shell type concentric arrangement having a thickness in the range of from about 6 to 10 g per 9,000 m length, wherein the nonwoven fabric has a density of about 0.03 g / cm ³ and a basis weight of about 24 g / m ² (0.7 The film comprises about 94% low density polyethylene with a melt index of about 5.5 and a specific gravity of about 0.9 g / cm ³ and 6% titanium dioxide concentrate and is layered with a thermal bonding pattern having from about 8 to 12 and is perforated to achieve about 27% of the open area for fluid passage, said distribution / retention layer being adhesively bonded to this fluid. is made by air laying and contains about 90% technical pulp of coniferous wood and 10% polyethylene terephthalate 31 311 / B of a 50/50 core / sheath copolyolefin, concentric arrangement, with a titer of 2.8 g per 9000 m length, wherein the distribution / retention layer has a basis weight of about 250 g / m ² and a specific gravity of about 0.14 g / cm ³ , said liner-forming layer is a nonwoven comprising two layers of technical pulp, the first layer containing about 500 g / m ² technical pulp of coniferous wood and having a printed sinusoidal pattern and the second layer containing about 400 g / m ² For example, the technical pulp of coniferous wood and is embossed into a pattern, the backing comprises a 0.0254 mm low density polyethylene film of pink color, adhesively attached to said liner-forming layer. 46. The feminine hygiene product of claim 45, further comprising a transfer delay layer between said distribution / containment layer and said insert-forming layer comprising a centrifugally bonded nonwoven larger in the x-y plane than said distribution / containment layer and comprising polyolefin fibers having a titer of about 2.7 g per 9,000 m length and wherein said web has a basis weight of about 27 g / m ² (0.8 axis) and the color is other than white.