MXPA01011269A - Leakage prevention means by distributing fluid - Google Patents

Abstract

The present invention provides a material for distributing liquid and a method for making such a material. The material includes a substrate permeable to a liquid and a chemical treatment applied to at least a portion of the substrate. The substrate further includes a leakage prevention means of at least one area of an increased concentration of the chemical treatment such that the chemical treatment is non-uniform along a planar dimension of the substrate and creates an area of preferential flow through the substrate. The chemical treatment useful for application to the substrate preferably induces wetting of the substrate by a liquid. The material for distributing liquid has best utility as a component of an absorbent article, e.g. a liner of a diaper. In a preferred embodiment, the substrate is attached to an absorbent layer such that the absorbent layer receives and retains the liquid when the liquid flows from a first planar dimension to a second planar dimension. Preferably, the absorbent layer is attached to an inner face of the substrate in face-to-face juxtaposition. The leakage prevention means is generally positioned in the absorbent article to prevent leakage out of the periphery of said absorbent article and the periphery is generally less wettable than the leakage prevention means.

Description

MEANS OF PREVENTION OF OCCURRENCE THROUGH FLUID DISTRIBUTION Field of the Invention The present invention is directed to a material for distributing the liquid and to a method for making such a material so that the material includes a liquid permeable substrate and a chemical treatment applied to at least part of the substrate. Spreading prevention means are formed on the substrate in at least one area of increased concentration of the chemical treatment so that the chemical treatment is not uniform along a planar dimension of the substrate and creates a preferential flow area to the substrate. through the substrate.

Background of the Invention Substrates such as nonwoven materials are known in the art and are used especially as components of absorbent articles and disposable articles due to the relatively low cost of such materials. As used herein, the term "absorbent articles" refers to devices which absorb and contain liquids, fluids and exudates, more specifically, absorbent articles refer to devices that are placed against or in proximity to the body of the absorbent. user pa absorb and contain the various fluids discharged from body, and try to include diapers, underpants learning, absorbent undergarments, incontinence products, products for women's hygiene medical applications, such as surgical covers, gowns, face masks, and bandages, clothing items or parts thereof including work clothes and laboratory clothing, and the like The term "disposable" used herein to describe absorbent articles that does not intend to be washed or otherwise restored or reused as an absorbent article.

There still exists in practice, however, a need for such a substrate, which when in use, serves as a barrier to the runoff of such liquids. An area that continues to receive a lot of attention and research in the technical community is the prevention of liquid runoff. A useful substrate in the prevention of drainage, such as a diaper component, includes leg flaps and waistbands, which typically perform the same functions, that is, improving the notch (and the comfort of the article and preventing runoff). A typical pier flap usually includes a collection of material to "cinch" the article, such as a diaper, around a user's leg.As used herein, the term "leg flap" will be understood by those skilled in the art. art of disposable personal care items such as diapers means that part of the diaper which is mechanically gathered around the user's leg to prevent drainage of such fluid or liquid, for example from urine. devices have proven not reliable as the only means to capture these fluids.

Various methods are also known in the art to apply coating of, for example, a moisturizing agent, to convey out any exudates from the surface of the skin to help avoid irritation of the skin. Specifically, U.S. Patent No. 5,792,404 issued to Cree et al., Assigned to "Th Procter &Gamble Company of Cincinnati, Ohio, describes a complicated approach to creating a" plurality of surface energy gradients ... to exert a force on the fluid "to effect the transport of the fluids towards the surface of the material, and thus towards the outside of the user." Such uses of the wetting agents have not been used to date to assist in the prevention of runoff of the material One theory is that these agents can, in fact, contribute to the runoff of the press as these agents are used for purposes of the well-being of the skin to transmit the fluid out of the skin and finally to the periphery outside of the garment When such humidifying agents are used, the leg flap is usually under even greater tension to contain the fluids Various processes for applying chemical treatments to substrates and the like are also known in the art. A common feature of these prior art processes is and attempt to achieve a uniform application of the agent. In fact, the literature is full of attempts to avoid the non-uniform application of coating agents. For example, references have been made to provide means for preventing the coating from accumulating on the corners (or edges) of an applicator roll to provide a uniform distribution of coating on the surface of the material.

The article and method of the present invention overcomes these above disadvantages and takes advantage of the accumulation of a chemical treatment applied in a manner such as to form a drainage prevention means designed to prevent the article from slipping.

Synthesis of the Invention The present invention provides a material for distributing the liquid and a method for manufacturing such a material. The material includes a liquid permeable substrate and a chemical treatment applied to at least a portion of the substrate. The substrate further includes a means of preventing the runoff from at least one area of an increased concentration of the chemical treatment so that the chemical treatment is not uniform along a planar dimension of the substrate and creates a preferential flow area through the substrate. of substrate. The material for distributing the liquid has better utility as a component of an absorbent article, for example a diaper liner. In a preferred embodiment, the substrate is to an absorbent layer so that the absorbent cap receives and retains the liquid when the liquid flows from a first planar dimension to a second planar dimension. Preferably, the absorbent layer is bonded to an inside face of the substrate in face-to-face juxtaposition. The run-off prevention means is preferably placed in the absorbent article to prevent outflow from the periphery of said absorbent article.

The chemical treatment useful for the application to the substrate and preferably indexes the wetting of the substrate by a liquid. As such, the run-off prevention means are generally positioned so that the outer periphery of the substrate is less humid than the run-off prevention means. The substrate can be made of various materials including a woven fabric, a non-woven fabric, foam, a knitted fabric, and a film. The material is preferably used in an absorbent article such as a diaper, a training underpants, an internal absorbent garment, a product for incontinence, in products for women's hygiene, in the medical application such as a cover, gown and surgical face mask and a bandage and an article of clothing or part thereof including a lab coat and work clothes, and the like.

Brief Description of the Drawings Figure 1 is a top plan view of material for distributing the liquid of the present invention including means for preventing runoff to prevent the flow of a fluid out of the periphery (outer edge of the material.

Figure 2 is an enlarged cross-sectional view of a liquid sticking to the outer surface of material of the present invention wherein the means for preventing runoff prevent runoff of the liquid out of the outer periphery of the substrate.

Figure 3 is a schematic drawing of an example process for forming the material for distributing the liquid of the present invention.

Figure 4 is a side view of the example embodiments of the second applicator rolls for applying a chemical treatment according to the present invention.

Figure 5 is a cross-sectional side view of the exemplary embodiments of the second applicator rollers, along with the impression made by these rollers when applying chemical treatment to the substrate of the present invention.

Figure 6 is a perspective view of an example article, in this case, a training underpants that uses the material to distribute the liquid of the present invention as the lining of the garment.

Figure 7 is a top plan view of another article, in this case a sanitary napkin, which uses the material to distribute the liquid of the present invention with the garment lining.

Detailed description of the invention Referring now to the drawings, where the like reference numbers represent the same or an equivalent structure, and in particular, Figure 1, the present invention provides a "material for distributing the liquid" which includes a substrate 10 which is permeable to a liquid and its chemical treatment applied to at least a portion of substrate 10. The substrate has, in this embodiment, four edges of an outer periphery shown in point 16, and a center 14 of the substrate between the means for preventing runoff 12. In Figure 1, the outer surface of the substrate 10 is shown. The runoff prevention means 12 is an increased concentration of chemical treatment so that the chemical treatment is not uniform along the planar dimension of the substrate and creates a preferential flow area through the substrate Preferably, the concentration of chemical treatment varied from a lower concentration in the center of the substrate at a higher concentration within the treated part. The means for prevention of runoff result from a transfer of an accumulation of said chemical treatment onto an applicator roll used to apply it to the substrate as will be discussed in greater detail below in relation to Figure 3.

As shown in Figure 1, the runoff prevention means are formed on one side of the outer periphery 16 along the direction of the substrate machine. It will be understood by one with ordinary skill in the art that such means may also be useful in the cross-machine direction. As used herein, the term "machine address" or MD means the length of a tel in the direction in which it is produced. The term "transverse direction to the machine" or CD means the width of the fabric, for example, an address generally perpendicular to the direction of the machine.

Returning to Figure 2, there is shown a cross-sectional and amplified side view of a preferred embodiment wherein a composite material 62 is formed of a substrate 10 which is attached to an absorbent layer 66 that the absorbent layer 66 receives and it retains the liquid 18 when the liquid 18 flows from a first planar dimension 20 to a second planar dimension 22. Preferably, the absorbent layer 66 is attached to an inner face 24 of the substrate 10 in face-to-face juxtaposition. The runoff prevention means 12 is placed in the composite material 62 to prevent runoff from the outer periphery 16 of composite material 62. As in most absorbent articles, some of the liquid 18 will be absorbed by the substrate 10, and will move through the substrate 10 in the direction of the absorbent layer 66. The runoff prevention means 1 formed from at least one area of an increased concentration of the chemical treatment will create a preferential flow area through the substrate 10 a, by example, an underlying absorbent cap 66.

The location of the means of prevention of runoff on the substrate will be suitable for the particular intended use. As an example, the material for distributing the liquid of the present invention can be used as a liner 64, for example, in an absorbent article 60 ta as a training underpants, as shown in Fig. 6. The absorbent article 60 includes the waste containment section 52 and the two side panels 54 and 56 define a waist opening 58 and a pair of leg openings 71 and 72. Figure 6 illustrates the absorbent article 60 provided with a user tors 84 shown partially in lines dotted The side panel 54 includes a stretchable side member 76 and a stretchable side member 68 that connect with the intermediate member 60 which is made of a non-stretchable material. E similar way, the side panel 56 includes a stretchable side member 72 and a stretchable side member 74 connecting the intermediate member 76 which is made of an n stretchable material. The absorbent article 60 also includes the front waist elastic member 68 and an elastic waist belt member 90 to provide additional conformation along the waist opening 58. The leg flaps 82 are provided with a waste containment section 5. between the side panels 54 and 56.

The material of the present invention can be used to form various parts of the absorbent article 60, particularly the liner 64. In this example article, the run-off prevention means 12 can be placed on one side of the leg flaps 82, and can also be placed on the side of the leg flaps 82. placed on one side of the front waist elastic member 78 the rear waist elastic member 90 to assist in the prevention of liquid from the garment. In this embodiment, the run-off prevention means are positioned on the side of the outer periphery of the liner so that the outer periphery is less wettable than the means for preventing runoff.

As another example and as shown in FIG. 7, the run-off prevention means 12 'is used in a liner 64 of an absorbent article 60', in this case a sanitary towel. In this case, it may be useful to provide the leakage prevention means 12 'at one or more locations shown to prevent the flow of menstrual fluid along the direction shown by the arrows 80.

Suitable substrates include woven fabrics, non-woven fabrics, foams, knitted fabrics, films and combinations of any of the foregoing. If the substrate is a film, the film can be made of and be blown or set processes and will be permeable to liquids. Examples of a non-woven fabric include those formed from a meltblowing process, a spin-linked process, coformmed processes and bonded and bonded tissue processes.

As used herein, the term "knitted fabric or fabric" means a fabric having a fiber structure of individual yarns which are interleaved, but not in an identifiable manner, as in a woven fabric. The basic weight of non-woven fabrics is usually expressed in ounces of material per square yard (osy) or grams per square meter. (gsm) and the useful fiber diameters are usually expressed in microns. (Note that to convert from ounces per square yard to grams per square meter, multiply ounces per square yard by 33.91).

As used herein, the term "spunbonded fibers" refers to fibers of small diameter which are formed by extruding the molten thermoplastic material as filaments of a plurality of thin, usually circular, capillary vessels of a spinner member with the The diameter of the extruded filaments is then rapidly reduced, as, for example, in US Pat. Nos. 4,340,563 issued to Appel et al., 3,692,618 issued to Dorschner et al., 3,802,817 issued Matsuki et al., numbers 3,338,992 and 3,341,394 granted Kinney, number 3,502,763 granted to Hartman, and number 3,542.61 granted to Dobo and others. Spunbonded fibers are not usually sticky when they are deposited on a collecting surface. Spunbonded fibers are generally continuous and have average diameters (from a sample of at least 10) larger than 7 microns (μm), more particularly, between about 10 and 20 microns (μm).

The substrate can be a layer of microfiber or d fiber blown with fusion. Melt blown fiber or microfiber is formed using a conventional melt blown process. The meltblowing processes generally involve extruding a molten thermoplastic material through a plurality of fine, usually circular, capillary vessels of a meltblown matrix such as filament or fused wires into gas streams (eg, air). , usually hot and at high speed and convergent which attenuate the filaments of the molten thermoplastic material to reduce its diameter, which can be a microfiber diameter d. Then, the melt blown fibers are carried by the high velocity gas stream and are deposited on a collecting surface to form a meltblown and randomly dispersed fiber fabric. Such a process is described, for example, in United States Patent No. 3,849,241 issued to Butin et al., Assigned to Exxon Researc Engineering Company. Melt-blown fibers are microfibers which are generally smaller than 10 micrometers (μm) in average diameter and are generally sticky when deposited on a collecting surface.

As used herein, the term "microfibers" means small diameter fibers having an average diameter of no greater than about 50 microns (μm), for example having an average diameter of from about 0.5 miera. (μm) to about 20 microns (μm), or more particularly, the microfibers can have an average diameter of from about 2 microns (μm) to about 40 microns (μm). Another frequently used expression of fiber diameter is denier, which is defined as grams per 9,000 meters of a fiber and can be calculated as fiber diameter in square microns (μm) multiplied by the density in grams per cubic centimeter multiplied by 0.00707 . A lower denier indicates a finer fibr and a higher denier indicates a thicker or heavier fiber. For example, the diameter of polypropylene fiber as of 15 microns (μm) can be converted to a denier by placing the square, multiplying the result by 0.89 grams per cubic centimeter and multiplying by Q.0-0707. Therefore a polypropylene fiber of 15 microns (μm) has a denier d around 1.42 (152 x 0.89 x 0.00707 = 1.415). Outside of the United States of America, the unit of measurement is most commonly the "tex" which is defined as the grams per kilometer of fiber. -The tex can be calculated as denier / 9.

The nonwoven fabric can be a mixture of various fibers or particles. For an example of such a mixture, reference was made to U.S. Patent No. 4,209,563 issued to Sisson, assigned to The Procter and Gambl Company, and incorporated herein by reference, in which elastomeric or non-elastomeric fibers are blended to form a single coherent fabric of fibers dispersed at random. Another example of such a fabric would be one made by a technique such as described in the aforementioned United States patent of Améric number 4,741,949. This patent describes a non-woven material which includes a blend of blown thermoplastic fibers and other materials. The fibers and other materials are combined in the ga stream in which the meltblown fibers are carried out in such a way that mixing with intimate entanglement of the meltblown fibers and other materials occurs, for example the wood pulp or the fibers. basic particles such as, for example, activated carbonate, clays, starches, or hydrocolloid particles (hydrogel) commonly referred to as superabsorbent materials prior to harvesting the fibers onto a collecting device to form a coherent fiber fabric dispersed at random.

The substrate is one which is formed from any material which can be made from suitable thermoplastic polymer or mixtures containing the same. As used herein, the terms "layer" or "gone" when used in the singular may have the dual meaning of a single element or a plurality of elements. As used herein, the term "polymer" generally includes, but is not limited to homopolymers, copolymers, such as, for example, block, graft, random and alternating copolymers, terpolymers, etc., and mixtures and modifications thereof In addition, unless specifically limited otherwise, the term "polymer" will include all possible geometric configurations of the molecule. These configurations include, but are limited to isotactic, syndiotactic, and random symmetries Useful polymers include polyolefins for example polyethylene, polypropylene and polybutylene including copolymers of ethylene, d-propylene copolymers, and butene copolymers, including high density polyethylene, low density polyethylene, low polyethylene. linear density. A polyethylene particularly useful may be obtained from U.S. I. Chemical Company under the trade designation Petrothene NA 601 (also referred to here as PE N 601 or polyethylene NA 601). Two or more polyolefins can be used. Other thermoplastic polymers include cellophane, polyvinyl acetate, polyvinyl alcohol polycaprolactam, polyester, polyamide, polyethylene terephthalate, polybutylene terephthalate, polytetrafluoroethylene or mixtures or coextrusions of one or more of these materials.

The substrates useful in the material of the present invention may additionally be made of elastomeric thermoplastic polymer such as block copolymers including polyurethanes; copolyester elastomers with polyether esters; the polyether polyamide block copolymers, the copolymers of ethylene and at least one vinyl monomer such as, for example, vinyl acetates such as ethylene vinyl acetate (EVA), the unsaturated aliphatic monocarboxylic acids, and the esters of such monocarboxylic acids; block copolymers having the general formula ABA ', A or ABAb as copoly (styrene / ethylene-butylene), styrene poly (ethylene-propylene) -styrene, styrene-poly (ethylene butylene) -styrene, (polystyrene / poly (ethylene) butylene) / polystyrene, poly (styrene / ethylene-butylene / styrene) polystyrene / poly (ethylene-propylene) -polystyrene-poly (ethylene proprietary) and the like Also, the new class of polymer referred to as single-site catalyzed polymers such as The "metallocene" polymers produced according to a metallocene process are also useful For a more detailed description of the metallocene polymers and the process for producing them which are useful in the present invention see the patent application of the treaty The commonly assigned patent cooperation number WO 98/29246 issued to Gwaltney et al., which is incorporated herein by reference in its entirety.

The chemical treatment is any chemical treatment which may be useful in the formation of the means for prevention of runoff of the present invention. Preferably, the chemical treatment is one which induces and wetting of the substrate by the liquid. Examples of such wetting agents include TRITON XI02 available from Union Carbide, Ahcovel Base N-62 mixture of sorbitol monooleate and hydrogenated and polyethoxylated castor oil, manufactured by ICI (Imperial Chemical Industries), Inc., GLUCOPON 220 available from Henkel, MASIL® SF-19 available from BASF, Inc., similar.

The chemical treatment is done from about 1% to about 100% chemical treatment and from about 0% to about 99% water. Preferably, the chemical treatment is made of about 20% chemical treatment and 80% water.

The material for distributing the liquid may be used in absorbent articles such as diapers, underpants, absorbent undergarments, incontinence products, products for women's hygiene, medical applications such as covers, Dressing gowns, face masks and surgical bandages, articles of clothing or parts thereof including work clothes and lab coats, similar Articles made from the material of the present invention may also have topical treatments applied to more specialized functions. Such topical treatments and their methods of application are known in the art include, for example, alcohol repellency treatments, antistatic treatments and the like, applied by spraying, embedding etc. An example of such topical treatment is the application of an antistatic Zelec® (available from E. I DuPont of Nemours and Company, of Wilmington, Delaware).

According to the present invention and by returning to Figure 3, a material for liquid distribution can be made by the process of the present invention. The method for applying the chemical treatment to the substrate 10 to form the means for preventing runoff was achieved, preferably by providing a first applicator roll 38 which is designed to be partially submerged in a chemical treatment 32 which is contained in a tank. of chemical treatment 34. By rotating the first applicator roll 38 about the axis 42, the chemical treatment 32 is taken up by the roller At least 1, and preferably a plurality of second applicator rolls 36 are placed on the axis 40 and contact with the first applicator roll 38, so that during rotation, the chemical treatment 32 is transferred from the first applicator roll 38 to the second applicator rolls 36. The outer face 26 of the substrate 10 is placed in contact with the second applicator rolls 36 so that the chemical treatment 32 is therefore transferred to the substrate 10. By applying the chemical treatment 32 in this manner, a heavy chemical treatment count 32 is formed on the surface of the substrate 10 to form the means for preventing runoff 12. A further advantage of the Application of chemical treatment as an increased concentration to a periphery of the substrate is the reduction in user exposure to chemical treatment, as applied when the chemical treatment is uniformly applied to the substrate. Preferably, the runoff prevention means 1 is formed in the contact area between the substrate 10 and a edge of the second roller applied 36. It will be understood that the chemical treatment can also be applied to the substrate and various degrees of concentration between the heavy beads d concentration formed by the edge of the applicator roll depending on the selection of the roller. It will further be understood that the second applicator rolls will be made of sufficient size to apply the necessary amount of chemical treatment to the surface of the substrate. As an example, if the substrate were to be used as a liner in a diaper, the substrate could be cut into liner size portions for conversion into diapers. The substrate, therefore, can be cut in, for example, 14 inches (35.14 centimeters) in the direction of the machine and 7 inches (17.57 centimeters) in the transverse direction. In this case, the width of the applicator roller can be, for example, 5 inches (12.7 centimeters) in width and which would apply the chemical treatment concentration beads along the outer periphery in the machine direction, approximately 1 inch (2.54 centimeters) of the outer periphery. A pressure point roller or stop (not shown) can be placed in contact with the inside face 24 of the. substrate 10 opposite the second applicator roller 36 to prevent the flapping of the substrate during the application of the chemical treatment.

Unlike previous methods used for the application of a chemical treatment to a substrate by means of roll applications, the use of a doctor blade is not useful in the present invention because the accumulation of a concentration of the chemical treatment It will be more feasibly removed. Along with the advantageous use of this accumulation, the various degrees of chemical treatment can be applied to the substrate depending on the selection of the second applicator roller 36 used. Returning to Figures 4 and 5, together with a standard roller, the applicator roll may be modified to provide such varying degrees of chemical treatment to the substrate. The second applicator rolls of Figure 4 include a roll having a concave surface 36a, a roll having engraved ends 36b and a roll having a convex surface 36c.

Although particular embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various other changes and modifications may be made without departing from the spirit of the invention. It is therefore intended to cover in the appended claims all those changes and modifications which are within the scope of the invention.

Claims (30)

R E I V I N D I C A C I O N S
1. A material for distributing liquid, which comprises: a) a substrate permeable to liquid; b) a chemical treatment applied to at least a part of said substrate; Y c) means for preventing runoff from at least one area of an increased concentration of said chemical treatment, wherein said non-uniform chemical treatment along a planar dimension of said substrate creates a preferential flow area through said chemical treatment. substratum.
2. 2. The material as claimed in clause 1 characterized in that said means for preventing runoff result from a transfer of an accumulation of said chemical treatment on an applicator to said substrate.
3. 3. The material as claimed in clause 1 characterized in that said chemical treatment further comprises from about 1% to about 100% chemical treatment and from about 0% to about 99 water.
4. 4. The material as claimed in clause 1 characterized in that said chemical treatment induces the wetting of said substrate by the liquid.
5. 5. The material as claimed in clause 1 characterized in that said substrate is selected from the group comprising a woven fabric, a non-woven fabric, knitted fabric, and film.
6. 6. The material as claimed in clause 5 characterized in that the material is used in an absorbent article selected from the group comprising a diaper, a training underpants, an internal absorbent garment, a product for the hygiene of women and a product for incontinence.
7. 7. The material as claimed in clause 5 characterized in that said material is used in an absorbent article for the medical application selected from a group comprising a cover, a gown, a mask for the face and a surgical bandage.
8. 8. The material as claimed in clause 5 characterized in that said material is used in an absorbent article selected from the group comprising a clothing article or a part thereof.
9. 9. The material as claimed in any of clauses 6, 7 or 8, characterized in that the means for preventing runoff are placed in an absorbent article to prevent runoff from the periphery of said absorbent article.
10. 10. An absorbent article comprising: a) a liner permeable to a liquid; b) a wetting agent applied to at least a part of said liner; Y c) means for preventing runoff from at least one area of an increased concentration of said moisturizing agent, wherein said wetting agent is not uniform along a planar dimension of said liner and creates a preferential flow area through the cover; wherein said d rain prevention means are positioned in said absorbent article to prevent runoff from the periphery of said absorbent article; and also where the periphery of said lining is less wettable than said means to prevent runoff
11. 11 A composite material for distributing liquid retention, comprising: a) a liquid permeable substrate, b) a chemical treatment applied to at least a portion of said substrate; c) means for preventing runoff from at least one area of an increased concentration of said chemical treatment, wherein said non-uniform chemical treatment along a planar dimension of said substrate creates a preferential flow area through said treatment. substrate and d) an absorbent layer in a face to face juxtaposition with an inner face of said substrate so that it receives and retains the liquid when the liquid flows from a first planar dimension to a second planar dimension of said composite material.
12. 12. The composite material as claimed in clause 11 characterized in that said means for preventing runoff result from a transfer d an accumulation of said chemical treatment on one applied to said substrate.
13. 13. The composite material as claimed in clause 11 characterized in that chemical treatment also comprises from about 1% about 100% of the chemical treatment and from about d 0% to about 99% water.
14. 14. The composite material as claimed in clause 13 characterized in that chemical treatment induces the wetting of said substrate by a liquid.
15. 15. The composite material as claimed in clause 11 characterized in that said substrate is selected from the group comprising a woven fabric, a nonwoven fabric, a foam, a knitted fabric, and a film.
16. 16. The composite material as claimed in clause 15 characterized in that said material is used in an absorbent article selected from the group comprising a diaper, a training underpants, an absorbent interior and a product for the hygiene of women and their product. for incontinence.
17. 17. The composite material as claimed in clause 15 characterized in that said material is used in an absorbent article for the medical application selected from the group comprising a cover, a gown, a mask for the face and a surgical bandage.
18. 18. The composite material as claimed in clause 15 characterized in that said material is used in an absorbent article selected from the group comprising a clothing article or a part thereof.
19. 19. The composite material as claimed in clause 15 characterized in that said article of clothing further comprises a lab coat or work clothes.
20. 20. The composite material as claimed in any of clauses 16, 17 18 or 19, characterized in that said means for preventing runoff are placed in said absorbent article to prevent runoff from the periphery of said absorbent article.
21. 21. The composite material as claimed in clause 20 characterized in that said means for prevention of runoff are placed on one side of at least one outer edge of said absorbent article.
22. 22. The composite material as claimed in clause 21 characterized in that the periphery d said liner is less humid than said means to prevent runoff.
23. 23. A process for making a material to distribute the liquid, which comprises: a) providing a liquid permeable substrate; b) provide an applicator for the application of a chemical treatment; Y c) applying said chemical treatment to said substrate to form a means for preventing the draining of at least one area of an increased concentration of said chemical treatment, wherein said chemical treatment is uniform along a planar dimension of said substrate. and creates preferential flow areas through said substrat to form a material to distribute the liquid.
24. 24. The process as claimed in clause 23 further characterized because it comprises: a) providing a first applicator roller for applying said chemical treatment; b) applying said chemical treatment to said first applicator roller; c) contacting said first applicator roller with a second applicator roller, so that chemical treatment is transferred from said first applicator roller to said second applicator roller; Y d) transferring said chemical treatment to said substrate by contacting said substrate with said second applicator roll.
25. 25. The process as claimed in clause 24 further characterized because it comprises: e) attaching an absorbent layer in a face-to-face juxtaposition with an inner face of said substrate to form a composite material such that the composite material receives and retains the liquid when the liquid flows from a first planar dimension to a second planar dimension .
26. 26. The process as claimed in clause 25 characterized in that said drip prevention means are formed in the contact area between said substrate and an edge of the second applicator roll.
27. 27. The process as claimed in clause 26 characterized in that said composite material forms an absorbent article and said draining prevention means are placed in said absorbent article to prevent runoff from the periphery of said absorbent article.
28. 28. The process as claimed in clause 27 characterized in that said chemical treatment induces the wetting of said substrate by a liquid.
29. 29. The process as claimed in clause 28 characterized in that said chemical treatment comprises from about 1% to about 100% chemical treatment and from about 0% to about 99 water.
30. 30. The process as claimed in clause 29 characterized in that said substrate is selected from the group comprising woven fabric, non-woven fabric, knitted fabric foam, and film. SUMMARY The present invention provides a material for distributing the liquid and a method for making such a material. The material includes a substrate permeable to a liquid and a chemical treatment applied to at least a portion of the substrate. The substrate further includes a means of preventing the runoff from at least one area of an increased concentration of the chemical treatment so that the chemical treatment is not uniform along a planar dimension of the substrate and creates a preferential flow area through the substrate. of substrate. The chemical treatment useful for application to the substrate preferably induces the wetting of the substrate by a liquid. The material for distributing the liquid has better utility as a component of an absorbent article, for example a diaper liner. In a preferred embodiment, the substrate is attached to an absorbent layer so that the absorbent layer receives and retains the liquid when the liquid flows from a first planar dimension to a second planar dimension. Preferably, the absorbent layer is attached to an interior face of the substrate in a face-to-face juxtaposition. The means for preventing runoff are generally placed in the absorbent article to prevent drainage out of the periphery of said absorbent article and the periphery is generally less Wettable that means d prevention of runoff.