MXPA06008984A - Hydrophobic surface coated absorbent articles - Google Patents

Abstract

The present invention relates to absorbent articles which include one or more components that have been treated with a hydrophobic surface coating intended to render such components impermeable to liquids having relatively low surface tensions.

Description

ABSORBENT ARTICLES COATED WITH A HYDROPHOBIC SURFACE CROSS REFERENCE TO A RELATED APPLICATION This application claims the benefit of the Provisional Application of States United number 60 / 543,785, filed on February 11, 2004.

FIELD OF THE INVENTION The present invention relates to absorbent articles that include one or more components, which have been treated with a hydrophobic surface coating with the intention of rendering such components liquid impervious and having a relatively low surface tension.

BACKGROUND OF THE INVENTION The main purpose of the consumer's use of disposable absorbent articles, such as diapers, trainers, sanitary napkins, pantiliners and adult incontinence articles, is to absorb and contain body exudates. Given this objective, it is quite frequent for such body exudates to escape the limits of the article as a result of some leakage from a point where the article contacts the skin or by infiltration through the material making up the absorbent article. The latter case is frequently caused by the inability of the materials of the article to perform as effective barriers for said body fluids.

The undesirable effects of leakage and / or improper containment, a difficult cleaning and / or residual contamination of the skin are especially evident with respect to the fecal material deposited in the diaper. The stools contained in the diaper over time can damage the wearer's skin and runoff from the diaper stool almost invariably represents an unpleasant and laborious cleaning. Thus, several attempts have been made to add characteristics to the diaper, such as, for example, barriers, receptacles, spacers, transverse barriers, perforated upper canvases and the like, to limit the movement of the fecal material through the upper canvas and / or to improve the confinement of fecal matter in the diaper. These attempts, in general terms, have not been successful because they have failed to address the root causes of these problems (ie the properties of faeces) and because of their cost and complexity. In addition, many of the means to isolate or contain feces are directed to fecal matter with certain physical properties (eg viscosity, free water content and particle size) and are not effective with exudates with physical properties outside this range. little. Accordingly, it would be desirable to provide an absorbent article with improved capacity for the handling of low surface energy fluids, particularly for the handling of feces. In addition, it would be advantageous to provide an economical absorbent article with the ability to minimize the negative effects of faeces or other viscous body wastes on the user or the caregiver. It would also be advantageous to provide an article that is designed to interact chemically or physically with the materials that make up the article and / or to reduce the amount of runoff or infiltration that may occur.

BRIEF DESCRIPTION OF THE INVENTION In order to contribute to solving at least some of the problems described above, the present invention provides an article comprising: a. A first liquid-permeable top sheet having an inner surface and an outer surface; b. a lower canvas having an internal surface and an external surface, wherein said lower canvas is attached to said upper canvas along a periphery; c. a nucleus to bsorbent d ispuesto e ntre d icho I ienzo s superior and said lower canvas; d. an additional component of the article selected from the group consisting of a core cover, an outer cover of the diaper, a flap, a first fold, a second fold, a band, a wing, an elasticized upper canvas and combinations thereof; wherein said component has an interior surface and an exterior surface; and e. a hydrophobic surface coating disposed on at least one surface of said lower canvas or said additional component of the article, wherein said coating comprises one or more silicone polymers and wherein said coating is substantially free of the presence of aminosilicones.

BRIEF DESCRIPTION OF THE FIGURES Figure 1 illustrates a plan view of the absorbent article of the present invention. Figure 2 illustrates a perspective view of an absorbent article of the present invention. Figure 3 illustrates a cross-sectional view of the absorbent article shown in Figure 2. Figure 4 illustrates a component of the present article prior to treatment with the hydrophobic surface coating of the present invention. Figure 5 illustrates a component of an article of the present invention that has been treated with a hydrophobic surface coating in accordance with the present invention. Figure 6 illustrates a component of an article of the present invention that has been treated with another hydrophobic surface coating in accordance with the present invention. Figure 7 illustrates through a perspective view another embodiment of the present invention in which the hydrophobic surface coating has been applied to at least one elasticized top sheet of an absorbent article.

DETAILED DESCRIPTION OF THE INVENTION For the present invention, various definitions have been specified herein with the intention of contributing to the interpretation of the claimed object. As used herein, the term "absorbent article" refers to devices that absorb and contain body exudates, and more specifically, refers to devices that are placed against or close to the user's body to absorb and contain the various exudates discharged from the body. Such devices include, but are not limited to, diapers, trainers, adult incontinence products, sanitary napkins and pantiliners. As used herein, the term "diaper" refers to an absorbent article generally worn by children and incontinent persons, which is worn around the lower region of the wearer's torso. In other words, the term "diaper" includes diapers for children, trainers, incontinence devices for adults, etc. As used herein, the term "disposable" refers to absorbent articles that are not intended to be washed or reconstituted or reused in any other way as an absorbent article (i.e. they are intended to be discarded after being used only once and, with preference, to be recycled, converted into fertilizer or disposed of in any other way in a manner compatible with the environment). As used herein, the term "telomer" refers to an addition polymer, usually of low molecular weight, in which the growth of the molecules is terminated by a transfer agent of a radical generating chain or a polymer of low molecular weight, in which the terminal group at the end of the chain-like molecule is not the same as that of the side group.

The term "telomere" can also be used as a synonym for oligomer, which is a polymer with very few (two to ten) repeating units. As used herein, the term "disposed" or "positioned" is used to indicate that one or more diaper elements are formed (attached or placed) at a particular location or position as a unitary structure together with other elements of the diaper. diaper or as a separate element attached to another diaper element. As used herein, the term "attached" encompasses configurations by means of which one element is directly secured to another element by attaching directly to the other element, and configurations by means of which one element is indirectly secured to another element by attaching to an intermediate member (s) which in turn are fixed to the other element). A "unitary" absorbent article refers to absorbent articles that are formed of separate parts joined together to form a coupled entity so that they do not require separate handling portions, such as a separate fastener and liner. As used herein, the term "comprise" means that the various components, ingredients, or steps, may be used together in the practice of the present invention. Therefore, the term "understand" encompasses the most restrictive terms "consists essentially of" and "consists of". All percentages, ratios and proportions herein are expressed by weight unless otherwise specified.

Absorbent Article The disposable absorbent articles of the present invention comprise a first fluid-permeable upper canvas, a lower canvas adhered to or attached to the upper canvas, and an absorbent core located between the upper canvas and the lower canvas. Disposable absorbent articles and their components, including the upper canvas, the lower canvas, the absorbent core, and any individual layer of these components, have an interior surface (or surface facing the body) and an exterior surface (or surface oriented towards the garment). As used herein, "interior surface" or "body facing surface" means that the surface of the article or component is placed near or adjacent to the user's body, while the "exterior surface" or "surface facing the garment" it is on the opposite side and is placed near or adjacent to the wearer's undergarment when using the disposable absorbent article.

The following description generally deals with the absorbent core materials, the first upper canvas and the lower canvas that are useful in the disposable absorbent articles. It should be understood that the present general description applies to these components of the specific absorbent article illustrated in Figure 1 and the others below, in addition to those corresponding to other disposable absorbent articles which are generally described herein. Figure 1 is a plan view of a diaper 50 of the present invention and shows an illustrative diaper (ie without induced elastic contraction) with portions of the structure that have been cut away to more clearly show the construction of the diaper 50, and with the portion of the diaper 50 facing outward from the wearer, the outer surface, facing the viewer. As illustrated in Figure 1, the diaper 50 preferably comprises a first liquid-permeable upper sheet 520; a lower waterproof sheet 530 bonded with the upper canvas 520; an absorbent core 540 located between the first upper canvas 520 and the lower canvas 530, the absorbent core 540 having an outer surface (or surface facing the undergarment) 542, an inner surface (or body facing surface) 544, side edges 546, waist edges 548 and wings 549. The diaper 50 preferably further comprises a first fold 550, a second fold 511 and an additional fold 512; a multi-sheet waist elastic designated 560 (also referred to herein as a waistband or band), and a generally multi-sheet fastener system designated 570. The diaper 50 illustrated in Figure 1 has an outer surface 52 , an inner surface 54 opposite the outer surface 52, a first waist region 56, a second waist region 58, and a periphery 51, which is defined by the outer edges of the diaper 50 in which the longitudinal edges are designated as 55 , and the edges of the end are designated as 57. (Although experienced technicians will recognize that a diaper is usually described in terms of having a pair of waist regions and a crotch region between the waist regions, in the present application , in order to simplify the terminology, the diaper 50 is described as having only waist regions that include a portion of the diaper that generally entity would be designated as part of the crotch region). The inner surface 54 of the diaper 50 comprises that portion of the diaper 50 which is located adjacent the wearer's body during use (i.e., the inner surface 54 is generally formed by at least a portion of the first upper canvas 520 and other components that are can join the first upper canvas 520). The outer surface 52 comprises that portion of the diaper 50 that is remote from the wearer's body (i.e. the outer surface 52 is generally formed by at least a portion of the lower canvas 530 and other components that may be attached to said lower canvas 530). (As used in this, the portion of the diaper 50 or a component thereof facing the user is also referred to as the user-facing surface. Likewise, the remote portion of the user is also referred to in the present surface facing the undergarment). The first waist region 56 and the second waist region 58 extend, respectively, from the edges of the end 57 of the periphery 51 to the lateral center line 53 of the diaper 50. Figure 1 also illustrates the longitudinal centerline 59. Figure 2 illustrates a perspective view of the article of the present invention, including at least a first and a second fold, wherein the bottom sheet and at least one of the additional components have been treated with the hydrophobic surface coating. Figure 3 illustrates a cross section of the diaper shown in Figure 2.

ABSORBENT NUCLEUS The absorbent core 540 can have any size or shape that is compatible with the cloth! 50. A preferred embodiment of the diaper 50 has a modified, asymmetric T-shaped absorbent core 540 having fins in the first waist region, but is generally rectangular in shape in the second waist region. Illustrative absorbent structures for use as an absorbent core in the present invention that have achieved wide acceptance and commercial success are described in the US Patent Nos. U. U.S.U. 4610678, 4673402, 4888231 and 4834735. The absorbent core may further comprise a dual-core system containing a pick-up / distribution core made of chemically hardened fibers, located on an absorbent storage core, as described in the patents from the USA UU num. 5234423 and 5147345. In general, the absorbent core is capable of absorbing or retaining liquids (for example, menstruation, urine and / or other body exudates). The absorbent core is preferably compressible, conformable and does not irritate the user's skin. The absorbent core can include any of a wide variety of liquid absorbent materials commonly used in absorbent articles, such as crushed wood pulp, which is usually referred to as air felt. Examples of other absorbent materials suitable for use in the absorbent core include creped cellulose wadding; meltblown polymers, including coform; chemically hardened, modified or cross-linked cellulosic fibers; synthetic fibers, such as crimped polyester fibers; swamp moss, tissue paper, including tissue paper wrappers and tissue paper laminates; absorbent foams; absorbent sponges; superabsorbent polymers; absorbent gelling materials, or any equivalent material or combinations of materials, or mixtures thereof.

The configuration and construction of the absorbent core can also be varied (for example the absorbent core can have zones of varying sizes and / or have a profile to be thicker in the center, hydrophilic gradients, gradients of the absorbent composition of the present invention, superabsorbent gradients, lower average density and areas with lower average basis weight, for example catchment areas, or may comprise one or more layers or structures). However, the total absorption capacity of the absorbent core must be compatible with the design load and intended uses for the absorbent article. Moreover, the size and absorptive capacity of the absorbent core can be varied to suit different uses, such as diapers, incontinence guards, pantiproctors, common sanitary napkins and night sanitary napkins, and to suit users, from children to adults. Adults. The absorbent core may include other absorbent components that are often used in absorbent articles, for example, a dust cleaning layer, a capillarity or collector absorption layer, or a secondary upper canvas (eg, elasticized) for the purpose of increasing the comfort of the user.

TOP LINER The first top sheet 520 of the diaper 50 is preferably made of a hydrophilic material that promotes the rapid transfer of liquids (eg, urine, menstruation and / or liquid stool) through the upper canvas. If the first upper canvas is made of a hydrophobic material, at least its upper surface is brought to be hydrophilic, so that liquids are transferred through the upper canvas more quickly. This reduces the likelihood that the body fluids will flow out of the upper canvas instead of passing through the upper canvas and being absorbed by the absorbent core. The first upper canvas can be made hydrophilic by irradiating it with a surfacer. Appropriate methods for drawing the upper canvas with a surfactant include spraying the material of the upper canvas with the surfacfanfe and immersing the material in the surfactant. A more detailed discussion of treatment and hydrophilicity will be found in the United States. UU num. 4988344 and 4988345. The upper canvas is preferably removable, soft to the tacit and does not irritate the user's skin. In addition, the upper canvas is permeable or liquid, which allows body fluids (eg menstruation, urine and / or watery stools) to penetrate easily through its thickness. A suitable top canvas can be made from a wide range of non-woven fabrics as nonwoven and non-woven fabric materials (eg, an array of non-woven feline fibers).; polymeric materials, such as perforated, perforated films, perforated plastic films and hydroformed thermoplastic films; porous foams; cross-linked foams; re-cyclic thermoplastic films; and lightweight thermoplastic fabrics. The fabrics of suitable non-woven and non-woven fabrics can be composed of natural fibers (for example wood or cotton fibers), synthetic fibers (for example polymer fibers such as polyester, polypropylene or polyethylene fibers) or a combination of fibers naíurales and siníéíicas. When the upper canvas is composed of a non-woven fabric, the weft can be made from a variety of known techniques. For example, the continuous material can be manufactured by means of thermally consolidated, carded, wet-cast, melt-blown, hydroentangling, combinations of oils or the like processes. Also, the arycles according to the present invention may comprise upper sheets which are elasticated for the purpose of providing storage compartments for body exudates, particularly depositions. Such sperm canvases and ríicles that the c oninians have been written in the country of the USA. no. No. 6482191. Such an upper textured layer 600 is illustrated in Figure 7 in a further embodiment of the present invention.

BACK SHEET The lower canvas is preferably impermeable to fluids of low surface tension (for example menstruation, urine and / or watery stools). As used in the present specification, "low surface tension fluids" refers to fluids having a surface tension less than about 72 dynes / cm, preferably less than about 60 dynes / cm, even more preferably less than about 55 dynes. cm and, most preferably from approximately 25 to approximately 55 dynes / cm. The lower canvas is preferably made of a thin plastic film, although other waterproof materials can also be used. As used in the present, the term "flexible" refers to materials that are flexible and that will adapt easily to the general shape and contours of the human body. The lower canvas prevents the exudates from being bum- bled and contained in the buc- cient core by means of articles that stretch in contact with the absorbent article, such as sheets, underpants, pajamas and underwear. The lower canvas may be composed of a material that is either uneven or uneven, polymeric films such as poly merylene or polypropylene films, or composite materials such as a film material with no film coating. A suitable bottom sheet is a polyethylene film that has a thickness of approximately 0.012 mm (0.5 mils) to approximately 0.051 mm (2.0 mils). Exemplary polyethylene films are those manufactured by Clopay Corporation of Cincinnati, O hio, under the designation P18-1401 and by Tredegar Film Products of Terre Hauie, Indiana, under the designation XP-39385. Preferably, the lower canvas is engraved and / or has a matte finish to give it a more fabric-like appearance. Additionally, the lower canvas can allow the vapors to escape from the absorbent core (ie, the lower canvas is venil) while still preventing the exudates from passing through the lower canvas. The size of the lower canvas is governed by the size of the absorbent core and the exact design chosen for the absorbent article. The lower canvas and the first upper canvas are located adjacent to the surface facing the garment and to the surface facing the body, respectively, of the absorbent core. The absorbent core is preferably bonded to the upper canvas, the lower canvas, or both by means of adhesion devices (not shown in Figure 1), such as those known to the industry. However, embodiments of the present invention are envisaged in which some portions of the entire absorbent core are not bonded to one or both, top canvas or bottom canvas. For example, the lower canvas and / or the first upper canvas can be fastened to the absorbent core or sealed by means of a continuous and uniform layer of adhesive, a layer of adhesive with a finished laminate or a combination of lines, spirals or spikes of adhesive separated. The adhesives that have turned out to be satisfactory are those manufactured by Bostik-Findley of Milwaukee, Wisconsin, with the designation HL-24012031. The adhesion means preferably comprises a filament network with an open loop of adhesive, as disclosed in US Pat. no. 4573986, issued to Minetola, et al. An illusive adhesion means of a network of filaments with an open pattern comprises several lines of adhesive filaments wound in a spiral pattern as illustrated by the apparatus and method set forth in US Pat. no. 3911173, awarded to Sprague Jr .; no. 4785996, issued to Zwieker, et al., And no. 4842666, granted to Werenicz. Alimentarily, the joining means may include thermal linkages, pressure joints, ultrasonic joints, dynamic mechanical joints or any of the suitable joining means or combinations thereof as are known in the industry.

ADDITIONAL COMPONENTS In a preferred embodiment, the diaper 50 further comprises at least a first fold 550 to provide improved containment of liquids and other body exudates; a 560 waist elastic that provides improved fit and containment; and a fastening system 570 that forms a lateral closure that maintains the first waist region 56 and the second cinientation region 58 in a super-pussy configuration that lateral urges are maintained around the circumference of the diaper with the objection of holding said diaper. in the user. The diaper 50 may also comprise elasticized panels (not shown) in the cinching regions 56 and 58 in order to provide an elastically resilient cinientation that provides a more comfortable and contoured fit, as well as a more effective diaper placement. 50. Elasticized leg folds 550 can be manufactured in different configurations, including those described in US Patten. num. 3860003, 4636207, 4695278, 4704115, 4795454, 4900317, 4909803 (reissued with Nos. USRE34920), 5085654, 5492751, 6476288 and SIR H1630. For example, the diaper 50 may include one or more first folds 550 that provide improved containment of liquids and other body exudates. The first folds 550 are also referred to as external leg folds, leg bands, lamellar fins, leg folds or elastic folds. The country of the USA no. 3,860,003 discloses a disposable diaper that provides an opening for the conirable leg that is a laryngeal alloy and one or more elastic members to provide an elasticated leg fold.

In addition, the diaper 50 may include one or more second folds 511 that also provide improved containment of liquids and other body exudates. The second folds 511 are also referred to as barrier leg folds, internal leg folds or "raised" elasticated fins. The countries of the USA num. 4,808,178 and 4,909,803 oíorgadas to Aziz et al. on February 28, 1989 and March 20, 1990, respectively, describe disposable diapers that have elasticated "levavenous" fins that improve the containment of the leg regions. The first bending 550 as the second bending 511 can be provided by dual bending, as exemplified in U.S. Pat. num. 4,695,278 and 4,795,454 granted to Lawson on September 22, 1987 and to Dragoo on January 3, 1989, respectively. Additional folds 512 may be provided in an article of the present invention, as described in the US Public Domain Invention Registration. H1630, published January 7, 1997. Figure 2 shows a diagram of a diaper in accordance with the present invention, which includes at least one or more first and second folds, wherein at least one of the folds has been Coated with the coating of hydrophobic surface. Figure 3 illustrates a cross-sectional view of the diaper depicted in Figure 2. In certain embodiments, the second fold may not be necessary due to the use of the hydrophobic coating in the first fold. The galvanic elastin comprises p referentially a na retine of cinuration (not to be shown) that can be constructed according to a series of distinctive configurations, including those described in the US patents. num. 4515595, 5026364 and 5151092. The diaphragm or diaper band preform or absorbent article may include a cutout of some kind that allows a comfortable placement of a child's navel, which tends to be sensitive for a period after birth. Preferably, this trimming has the shape of a semicircle, but it can be of any geometric shape that allows a comfortable fit of the navel of the child. The elasticized side panels can be constructed according to a series of configurations. Examples of diapers with elasticized side panels located on the flaps (or wings) of the diaper in US patenids are described. UU num. 4857067, 4381781, 4938753 and 5151092. Illusionary fastening systems are described in the US patents. num. 4846815, 4894060, 4946527, 3848594, 4662875 and 5151092.

Hydrophobic Surface Coating The disposable absorbent ariques of the present invention further comprise a hydrophobic surface coating disposed on at least one surface of one or more of the various components of the article, including, but not limited to, a core cover, a Excerpting diaper cover, a aleia, a wing, a band, a lower canvas, a first fold, a second fold and even combinations of those. This hydrophobic surface coating comprises one or more silicone polymers and is also practically free of the presence of aminosilicones. Suitable silicone polymers are selected from the group consisting of MQ silicone resins, polydimethylsiloxanes, reliculated silicones, liquid silicone elastomers and combinations thereof. Generally, the molecular weight of silicone polymers should be at least about 4000 PM) preferably at least about 10,000 MW, more preferably at least about 15,000 MW, even more preferably at least about 20,000 MW, and, most preferably at least approximately 25,000 PM. The preferred polydimethylsiloxanes are selected from the group consisting of vinyl-terminated polydimethylsiloxanes, methylhydrogen dimethylsiloxanes, hydroxyl-terminated polydimethylsiloxanes, organically modified polydimethylsiloxanes and combinations of these. Alternatively, fluorinated polymers can also be used. The fluorinated polymers are selected from the group consisting of telomers and polymers containing alkyl and / or perfluorinated alkyl chains. For example, fluorinated surfactants that are commercially available from Dupont under the trade name of Zonyl® are suitable for use herein. In particular, Zonyl® 321, 329, 8740, 9027 and 9360 are suitable for use in the present invention. In addition, they may be useful for the presence of other Zonyl® materials that include fluorinated additives, such as microparticle powders. These include, but are not limited to, Zonyl® MP1100, MP1200, MP1400, MP1500J, MP1600N, TE-3667N (which disperses in water). Without being limited by theory, applicants have found that such hydrophobic surface coatings, when applied to various components of absorbent articles, tend to wrap or at least partially coat one or more fibrous structures of the component in such a way as to form a network similar to a uniform film and adheres around the fibrous structures and partially fills the porous network of the fibrous spherules. This film-like network serves to increase the barrier properties of the component, particularly when exposed to fluids with low surface energy. The film-like web is illustrated in Figures 4, 5 and 6. Figure 4 illustrates a non-coated, fibrous non-woven fabric of 15 grams per square meter. In Figure 5, the non-stretched fabric of Figure 4 has been framed with a hydrophobic surface coating known as PSA950, which is commercially available from GE Silicones. PSA950 is a pressure sensitive adhesive that is a phenyl siloxane in solven. Here, the film-like network between the fibrous spherules of the non-erect sea has been formed. Similarly, in Figure 6, the non-woven, non-coated blown fleece of Figure 4 is coated with a hydrophobic surface coating known as water repellent for fabrics C2-0563, which is commercially available from Dow Corning. Again, it is clear that a film-like network is formed between the fibers and the pores of the non-woven fabric, which improves its barrier properties. In certain embodiments of the present invention, the coating may be intrinsically elastomeric. In the same way, when it is deposited on one or more surfaces of a component of an absorbent article,, the coating of hydrophobic surface can also provide an elastic coating to the component of the article when it is stretched. In addition, although it is contemplated that the present invention is primarily directed to absorbent articles for personal care, it is readily foreseeable that the hydrophobic surface coatings set forth herein may also be disposed on substrates used for other purposes. For example, the supplied substrates can be used in the manufacture of various medical or surgical materials (eg bañas, surgical curtains, booties and caps), cloths (for example for cleaning cars, lens cleaning, packaging, wet cleaning and of dust), vesíimenía of consumption, eíc. Moreover, it is important to note that, when the coating is deposited on a component of an article, it is preferred that the composition be practically free of the presence of polymers containing molten additives selected from the group consisting of polydimethylsiloxanes, guerbet esters, and combinations of these.

TEST METHODS Liquid Penetration The barrier performance of the coated substrates is determined by measuring the time at which a liquid added to the surface of the substrate penetrates the surface of said substrate. The test method was adjusted to! Edana 150.4-99 using a Lisíer SN L5725 Model 1998 with the following modifications: 1. The absorbent reference cloth consists of 10 layers of filter paper (100 mm x 100 mm Ahlsírom Grade 989) supplied by Empirical Mfg. Co., Inc. (Cincinnati, OH 513-948-1616). 2. The simulated water / urine deposition sample consists of 0.04% (weight / volume) of aqueous solution X-100 tyri (CAS No. 9002-93-1) with a surface tension of approximately 32 + milinew / m. 3. Before beginning each test and rinse each replication, rinse the Lister electrodes with a 0.9% NaCl aqueous solution. An average liquid penetration is determined by dividing the sum of the times by the amount of component samples that are tested. Generally, the number of samples will be approximately 30, that is, n = 30. In order to determine the increase of the penetration time of the resulting liquid, a comparison of the penetration time of the average liquid of coated samples versus uncoated (or non-coated) samples is carried out.

EXAMPLES Example 1 A hydrophobic surface coating of the present invention is prepared by spraying, immersing or using a conical roller process with an aqueous mixture of polydimethylsiloxane and methyl hydrogen polydimethylsiloxane terminated with vinyl in a ratio of 30: 1 so that the coating is deposit on the substrate. The non-woven fabrics used in this example were non-woven SMS polypropylene fabrics of 13 grams per square meter, 15 grams per square meter, 17 grams per square meter, 20 grams per square meter, 30 grams per square meter and 34 grams. per square meter and non-eyed sheets of molten polypropylene of 15 grams per square meter and 20 grams per square meter, which are commercially available from various suppliers. The aqueous mixture also contains an ion transition melamine to facilitate the re-icing of the PDMS polymers. The wet coated substrate is dried at 90 ° C - 120 ° C for 0.1 - 1.0 minutes depending on whether the sample is coated by a commercial or laboratory coating process, and then stored in a suitable container for later use .

Example 2 A diaper bending component of nonwoven fabric brought with a hydrophobic surface coating is prepared. A 10% solution of vinyl-terminated PDMS (commercially available in GE Silicones as SM3200) and PDMS methyl hydrogen PDMS (commercially available in GE Silicones as SM3010) is prepared and mixed for 30 minutes. A typical bending component (spunbond-cast cloth, as described in US Pat. No. 5492751) is immersed in the solution and the excess liquid is drained by means of a calender roll; Compose in an air convection oven at an interval of 90 ° C - 120 ° C for a period of no more than 45 seconds for the coating to settle in. The material of the bend is incorporated in a year, as written. in I p p aires of the US E U. Nos. 3860003, 4636207, 4695278, 4704115, 4795454, 4900317, 4909803 (reissued with No. USRE34920), 5085654, 5492751, 6476288 and SIR H1630.

Example 3 A bending and / or lower cloth diaper composition of non-woven fabric treated with a hydrophobic surface coating is prepared. A 10% solution of hydroxy-terminated PDMS (commercially available in GE Silicones as SM2245) and PDMS meyly hydrogen PDMS (commercially available from GE Silicones as SM2014c) is prepared and mixed for 30 minutes. The compound of fold and / or composite lower canvas is immersed in a non-stretched-melted cloth, as described in the US Pat. no. 5492751, in the solution and the excess liquid is drained by means of a calender roller; the component is dried in an air convection oven at a temperature of 90 ° C -120 ° C for a period of no more than 45 seconds for the coating to be deposited on the substrate and incorporated into a diaper, as described in U.S. Pat. num. 3860003, 4636207, 4695278, 4704115, 4795454, 4900317, 4909803 (reissued with Nos. USRE34920), 5085654, 5492751, 6476288 and SIR H1630. All documents cited in the Detailed Description of the invention are, in part relevant, incorporated herein by reference; The citation of any document should not be construed as an admission that it constitutes a prior art with respect to the present invention. Although particular embodiments of the present invention have been illustrated and described, it will be evident to those experienced in the industry that changes and modifications can be made without deviating from the spirit and scope of the invention. It has been intended, therefore, to cover in the appended claims all the changes and modifications which are within the scope of the invention.

Claims (12)

1. An absorbent article that comprises: a. A first upper layer of water that has an internal surface and an external surface; b. a lower canvas that has an internal surface and an external surface, characterized by the fact that the lower canvas is joined to the upper canvas along a periphery; c. an absorbent core disposed between the upper canvas and the lower canvas; d. an additional component of the article selected from the group consisting of a core cover, an outer cover of the diaper, a aleia, a first fold, a second fold, a band, a wing, an upper elasticized canvas and combinations thereof; where the component has an interior surface and an exterior surface; and e. a coating of hydrophobic surface disposed on at least one surface of the lower panel or the additional component of the article, wherein the coating comprises one or more silicone polymers and wherein the coating is substantially free of the presence of aminosilicones.

2. The article according to claim 1, further characterized in that the silicone polymer is selected from the group consisting of MQ silicone resins, polydimethisiloxanes, reiciculated silicones, epoxy silicones, amido silicones, liquid silicone elastomers, and combinations thereof.

3. The article according to claim 2, further characterized in that the silicone polymer is a polydimethylsiloxane selected from the group consisting of vinyl-terminated polydimethylsiloxanes, meilyhydrogen dimethylsiloxanes, organically modified polydimethylsiloxanes, hydroxyl-terminated polydimethylsiloxanes, and combinations of such.

4. The article according to claim 1, further characterized in that the silicone polymer has a molecular weight of at least about 4000 PM.

5. The article according to claim 1, further characterized in that the coating is arranged on the inner surface of the lower canvas or of the additional component of the article.

6. The article according to claim 1, further characterized in that the coating is arranged in a surface area of at least one component in an amount of at least about 0.01 grams per square meter.

7. The article according to claim 1, further characterized in that the component of the article on which the coating is disposed is virtually free of the presence of polymers containing molten additives selected from the group consisting of polydimethylsiloxane, guerbe esters, and combinations of those

8. The article according to claim 1, further characterized in that the article further comprises a cut in the waist for the location of a child's navel.

9. A method for increasing the hydrophobicity of a component of an absorbent article; The method comprises the step of depositing on the component a hydrophobic coating characterized in that the coating comprises one or more silicone polymers and wherein the coating is practically free of the presence of aminosilicones.

10. An absorbent article that includes: a. A first upper layer that is impermeable to the liquids that has an internal surface and an external surface; b. a lower canvas having an internal surface and an external surface, characterized in that the lower canvas is joined to the upper canvas along a periphery; c. an absorbent core disposed between the upper canvas and the lower canvas; d. at least one fold disposed along the periphery of the upper canvas and the lower canvas; the fold has lower and outer surfaces; and e. a coating of a hydrophobic surface disposed on at least one bending surface, wherein the coating comprises one or more silicone polymers and further characterized in that the coating is tactically free from the presence of aminosilicones.

11. A disposable substrate article comprising: a. A substrate b. a hydrophobic surface coating disposed on at least one surface of the substrate, characterized in that the coating comprises one or more silicone polymers and wherein the coating is practically free of the presence of aminosilicones.

12. The article according to claim 10, further characterized in that the article is selected from the group consisting of disposable garments, cleaning rags, cleaning cloths, booties, packaging materials, curtains, and combinations thereof.