WO2000041737A1

WO2000041737A1 - Absorbent product with filtering surface covered with a protectiv e emollient

Info

Publication number: WO2000041737A1
Application number: PCT/EP1999/010375
Authority: WO
Inventors: Ian Thomas Cooper; Stefano Masciulli; Matteo Sternai
Original assignee: Linostar S.P.A.
Priority date: 1999-01-11
Filing date: 1999-12-23
Publication date: 2000-07-20
Also published as: IT1306196B1; AU2286100A; ITMI990023A1

Abstract

A disposable absorbent product comprising an absorbent mat which is arranged between an internal liquid-permeable filtering layer, which is directed toward the user's skin during use, and an external layer which is impermeable to liquids and optionally vapor-permeable and is directed toward the clothing during use, a protective and emollient material being arranged discontinuously on the filtering layer, the material being partially transferred to the user's skin during use and being solid at 20 C, characterized in that the material comprises 95 to 100 % of a mixture of hydrogenated natural triglycerides.

Description

ABSORBENT PRODUCT WITH FILTERING SURFACE COVERED WITH A PROTECTIV E EMOLLIENT

Technical Field

The present invention relates to absorbent products, such as baby diapers, sanitary towels, panty liners, potty-training diapers, pull-on diapers, diapers and towels for incontinent adults, absorbent products for leaking milk during breast-feeding (breast pads), and the like. More particularly, the present invention relates to absorbent products in which the surface that is in contact with the user's skin during use, termed filtering surface, is treated so as to give it emollient properties which protect the user's skin in normal conditions of use. The invention relates in particular to baby diapers. Background Art

It is well-known that an inflammatory reaction occurs as a consequence of prolonged contact of the skin with irritants, particularly in the gluteal and perineal region. Maceration and bacterial proliferation can be concomitant causes of irritation.

In particular, urine acts by saturating the diaper, causing excessive hydration and consequent skin maceration. Excessive hydration also causes an increase in skin permeability which further boosts the irritant activity of the substances contained in urine and feces.

It is also known that this occurs even more frequently in children of diaper age because their skin is softer, produces less grease and has only partially developed immune defenses.

In order to minimize the effect of prolonged contact of the skin with the exuded liquid, absorbent products have been developed which are capable of absorbing large amounts of liquid and of retaining them in an absorbent mat; said products are characterized by a high rate of filtration of the liquid from the filtering surface to the absorbent mat, associated with a barrier effect which contrasts the return of the liquid to the surface. However, such products do not absorb feces, which remain in contact with the user's skin and contain enzymes which are locally highly aggressive.

In order to obviate these problems, in addition to suitable local hygiene, after cleansing it is often necessary to use creams, oils and lotions which can constitute a barrier to the chemical-microbial aggression of the skin.

Various preceding proposals of absorbent products provided with protective, emollient and therapeutic substances have been made in order to eliminate the need for the user, or for the mother in the case of baby diapers, to separately apply a protective barrier during changing. For example, US patent 3,896,807 in the name of Buchalter discloses a product which is impregnated with a solid oily formula which, when moistened, forms a cream which has beneficial properties for the user's skin. However, this cream forms only when body fluids are released.

Moreover, a mineral oil, such as liquid vaseline, has been used to partially coat the surface of the absorbent product that is placed in contact with the body of the user. This solution has been found to have drawbacks, such as the need to apply large amounts of mineral oil because by being fluid and mobile at ambient temperature said mineral oil tends not to remain localized on the surface of the absorbent product but to migrate through said surface into the absorbent product. Besides, the large amounts of mineral oil tend to block the openings of the filtering surface of the absorbent product, thus hindering the rapid passage of the liquid toward the absorbent mat and causing stagnation, surface flow and leakage of the exuded liquid from the absorbent product. Moreover, while the mineral oil migrates inside the absorbent product, it tends to act as a hydrophobic additive, reducing the absorption ability of the absorbing core while it is being used.

US patent 3,489,148 in the name of Duncan et al. discloses a baby diaper which comprises a hydrophobic and oil-repellent external surface in which a portion of the external surface is coated with a discontinuous film of oily material. The oily material is constituted by animal oils (for example triglycerides of higher fatty acids, such as stearic acid, palmitic acid and oleic acid; lanolin, etcetera), vegetable oils, such as soybean oil, cottonseed oil, canola oil, olive oil, palm oil, coconut oil, or by mineral oils such as vaseline. However, the diapers described by Duncan et al. have the drawback of a slow transfer of urine to the underlying absorbent cores through the external hydrophobic and oil-repellent surface.

Moreover, the oily materials used have a high percentage of components which are liquid at ambient temperature; these components migrate inside the diaper and are absorbed before the absorbent product is used. The absorbent ability of the product accordingly decreases.

Moreover, their migration tends to impermeabilize the filtering element

(whose fibers can even be treated with an additive which confers hydrophobic properties, as mentioned for example in US patent 3,489,148). These negative effects worsen with use and as the temperature rises due to body heat. Moreover, the material has an unpleasant greasy tactile response.

Besides, the mobility of the oily material can bring it into contact with the adhesives that maintain the integrity of the structure of the diaper and with the packaging. In some cases, these interactions can lead to negative effects, since they can limit the bonding strength of the adhesives because the ointment acts as a lubricant, solvent or diluent, or can damage the printing or seals of the package.

Accordingly, the need has arisen to obtain absorbent products having a filtering surface which is treated so as to have chosen protective or therapeutic properties and whose absorbent and/or filtering properties are not negatively affected by the treatment in order to obtain the protective and therapeutic properties and without using large amounts of products for protective and therapeutic coating and without the need for particular packaging conditions. In order to obviate these requirements, attempts have been made to obtain protective and therapeutic coatings which are immobilized on the filtering surface of the absorbent product in the conditions of normal storage before use (ambient temperature) and can be transferred to the skin of the user during use (at body temperature and in contact with the user's body).

US patents 5,635,191, 5,609,587, 5,607,760 and 5,643,588 disclose absorbent products with a liquid-permeable filtering surface treated with a lotion which comprises an emollient component and an emollient- immobilizing component. In particular, US patent 5,635,191 discloses an absorbent product with a filtering surface which comprises a coating with a lotion which contains a polysiloxane emollient and an emollient immobilizing agent which is chosen among polyhydroxy fatty acid esters, polyhydroxy fatty acid amides, C₁₂-C₂₂ fatty alcohols, C₁₂-C₂₂ fatty alcohol ethoxylates, and mixtures thereof.

US patent 5,609,587 discloses an absorbent product with a filtering surface provided with a coating of a lotion which comprises an emollient constituted by a liquid polyol polyester which comprises at least four hydroxyl groups esterified with C₂-C₃₀ fatty acids, and an emollient immobilizing agent which has a melting point of at least 35 C.

US patent 5,607,760 discloses an absorbent product in which one filtering surface comprises a coating with a lotion which comprises an emollient chosen among vaseline, fatty acid esters, alkyl ethoxylates, silicone wax and mixtures thereof, and an immobilizing agent for the emollient, which comprises a solid polyol polyester comprising at least four hydroxyl groups esterified with C₂-C₃₀ fatty acids.

US patent 5,643,588 discloses a diaper in which a coating with a lotion is applied to a filtering surface, said lotion comprising an emollient chosen among emollients based on vaseline, fatty acid esters, alkyl ethoxylates and mixtures thereof, and an immobilizing agent for the emollient, which comprises a component chosen among polyhydroxy fatty acid esters, polyhydroxy fatty acid amides, C₁₂-C₂₂ fatty alcohols, C₁₂-C₂₂ fatty acids, C₁₂-C₂₂ fatty acid ethoxylates, and mixtures thereof. Summary of the Invention

The aim of the present invention is to eliminate the above drawbacks in absorbent products, by providing an absorbent product which allows to obtain a protective and emollient action for the skin of the user and at the same time maintains high filtration and absorption effectiveness. Within the scope of this aim, an object of the present invention is to provide an absorbent product which is capable of transferring to the skin of the user, at the time of use, a material having emollient and protective properties which does not migrate on the filtering element and toward the absorbent mat in normal storage conditions and in the absence of an immobilizing agent.

Another object of the present invention is to provide an absorbent product which is treated so as to give the user benefits related to skin protection, easy cleansing and therapeutic effects, without the need to use high levels of mineral oils, which often act as diluents for the adhesives and can cause integrity problems.

Another object of the present invention is to provide an absorbent product which ensures maximum safety for the user and has a dry and non- greasy tactile response at ambient temperature.

Another object of the present invention is to achieve the above aim and objects by using a single component which does not require the addition of an immobilizing agent.

As mentioned above, the use of oils and greases for topical applications with emollient and protective purposes is well-known, but these materials usually have unsuitable physical characteristics, and particularly an excessively low melting point and a consistency at ambient temperature which is insufficient to have the intended control over their arrangement in the filtering layer. Moreover, at ambient temperature these materials have a high content of liquid fats which cause them to be moist and greasy to the touch.

The inventors of the present invention have found a material which has an increased melting point and a limited percentage content of liquid fats at ambient temperature and at the same time has protective and emollient properties for the skin. This material is a mixture of natural triglycerides subjected to hydrogenation.

Hydrogenation in fact makes mixtures of natural triglycerides, particularly palm oil, particularly adapted for the aim and objects of the present invention, eliminating the need to use an immobilizing agent together with the protective and emollient material. The absorbent product according to the present invention is a disposable absorbent product which comprises an absorbent mat which is arranged between an internal liquid-permeable filtering layer, which is directed toward the user's skin during use, and an external layer which is impermeable to liquids and optionally vapor-permeable and is directed toward the clothing during use, a protective and emollient material being arranged on said filtering layer, said material being partially transferred to the user's skin during use, said material being solid at 20 C, characterized in that said material comprises 95 to 100% of a mixture of natural triglycerides subjected to hydrogenation. The absorbent product according to the present invention therefore contains a protective material which is solid at ambient temperature and does not migrate on the filtering element and toward the absorbent mat without having to add an immobilizing agent, with a corresponding advantage in terms of practicality, cost and safety. Since the material used is a mixture of natural triglycerides, it satisfies consumers seeking to use natural products, with a high level of safety because it is in fact edible.

Due to the movements and pressures generated by the user during the use of the absorbent product according to the present invention, a thin layer of said material is deposited on the user's skin, performing a protective and emollient action. In the present description, the material used is termed

"protective and emollient material".

In one embodiment, the absorbent product according to the present invention is substantially constituted by a mixture of hydrogenated natural triglycerides.

The expression "substantially constituted", as used in the present description, means that the material contains no other components except in percentages below 1%. In particular, the material used contains no immobilizing agents. The expressions "hydrogenated triglycerides" and "hydrogenated palm oil", as used herein, mean triglycerides and palm oil subjected to hydrogenation, respectively.

The expression "absorbent product", as used herein, relates to devices capable of absorbing and retaining body exudates when placed in contact with the skin of the user.

The absorbent products according to the present invention are of the disposable type, i.e., items which cannot be washed or otherwise reconditioned or reused after a single use.

Examples of absorbent products according to the present invention include baby diapers, sanitary towels, panty liners, potty-training diapers, pull-on diapers, diapers and towels for incontinent adults, and absorbent products for leaking milk during breast-feeding (breast pads).

Preferably, said mixture of hydrogenated natural triglycerides (or fat) has a content of solid triglycerides of 60 to 90% at ambient temperature and of 30 to 60% at 35°C.

The hydrogenated natural fat used for the present invention has a low unsaturation level, preferably having an iodine number between 35 and 45. Conveniently, the hydrogenated natural fat according to the present invention has a melting point between 35 and 60° C, preferably between 40 and 50°C.

In one embodiment of the present invention, said mixture of hydrogenated triglycerides is constituted by palm oil subjected to hydrogenation. Preferably, the hydrogenated palm oil used for the present invention comprises the following, expressed in terms of fatty acids: 5 to 15% stearic acid, 35 to 46% oleic acid, no more than 2% linoleic acid, 43 to 47% palmitic acid, no more than 1% lauric acid and no more than 1.5% myristic acid.

Conveniently, the hydrogenated palm oil used in the present invention has a melting point between 42 and 48°C, is solid at ambient temperature and in storage conditions, is dry and non-greasy to the touch, and can be partially transferred to the skin of the user at body temperature due to the contact, pressure and movements of the user. Moreover, the hydrogenated palm oil used in the present invention preferably has a solid content of 75 to 85% at 20°C and a solid content of 35 to 45% at 35°C. Moreover, said hydrogenated palm oil preferably has an iodine number between 36 and 43.

The amount of material applied is preferably in the range between 0.1 and 50 g per square meter, preferably between 3 and 30 g per square meter, relative to the portion of the surface of the filtering layer on which the fat is applied.

The protective and emollient material is applied discontinuously to a surface which has a length of for example 50 to 600 mm, preferably 200 to

400 mm, and a width of for example 20 to 400 mm, preferably 50 to 80 mm.

In one embodiment, the material is applied in the form of mutually spaced bands with a width of 2 to 10 mm.

The protective and emollient material applied to the absorbent products according to the present invention can comprise other additional components, typically present in emollients, creams, etcetera, up to a maximum of 5%, in addition to the hydrogenated natural fat. The following are examples of optional components suitable for the present invention: water, pH control systems, vitamins, anti-inflammatory agents, disinfectants and antibacterial products, viscosity modifiers, fragrances, film-forming agents, deodorants, opacifiers, astringent agents, and the like. It is also possible to add stabilizers or antioxidants to improve the shelf life of the products according to the present invention.

Optionally, the hydrogenated fat used in the present invention can contain small amounts of hydrophilic surfactant in order to improve the wettability of the protective and emollient material, reducing if necessary the likelihood of stagnation and flow of body exudates on the filtering element, with the risk of escaping from the absorbent product, instead of quickly passing through the filtering element and being absorbed by the absorbent material.

The material can also comprise a color in order to improve the aesthetics of the products of the present invention and to allow to immediately identify the protective material, with advantages for example for quality control etcetera.

Optionally, in the absorbent products according to the present invention the applied protective material comprises up to 5%, preferably up to 1%, by weight of additives with lenitive properties and with antioxidants such as for example camomile oil and vitamin E acetate.

The protective and emollient material constituted by hydrogenated natural fat is applied so that the upper filtering surface does not saturate with this material, in order to avoid clogging the openings of the filtering layer and reducing the ability of said filtering layer to transfer fluid to the underlying absorbent mat. Besides, saturation of the filtering material is not necessary in order to achieve therapeutic, protective and emollient effects which are beneficial to the skin. The protective and emollient material is preferably applied to the filtering surface of the absorbent product, for example a diaper, in an amount between 0.1 g per square meter and 50 g per square meter. Since the material is substantially immobilized on the surface of the filtering layer, a low amount of material is sufficient to achieve the intended therapeutic, protective and emollient benefits, without however saturating said layer and reducing absorption and/or wettability properties.

The protective material can be applied to the entire surface of the upper layer or to portions thereof. Preferably, the protective material is applied in bands which are aligned and centered with respect to the central axis of the absorbent product.

The protective material can be applied to the filtering layer at any stage of the assembly of the absorbent product. For example, the protective material can be applied to the upper layer of the finished absorbent product, before packaging it. The protective material can also be applied to the filtering layer before it is joined to the other components in order to form the finished absorbent product.

The protective and emollient material can be applied in the melted state to the filtering layer and be left to cool in contact with the filtering element in order to quickly solidify and remain locked to the filtering layer without dispersing on said filtering element or penetrating into the diaper.

In other embodiments, the protective material can be applied to the surface of the filtering layer which is directed toward the absorbent mat.

In other embodiments, the protective material can be applied to any part of the absorbent product from which it can be partially transferred to the skin of the user, for example on layers located below the filtering layer.

The protective material described herein can also be used separately from the absorbent product as a skin protection and emollient material.

In a conventional manner, the absorbent products comprise an internal liquid-permeable layer (directed toward the skin of the user during use) which is termed filtering element, an external layer (directed toward the clothes during use) which is impermeable to liquids, and an absorbent core or mat which is arranged between the filtering layer and the external layer.

It is well-known to the experts in the field that the absorbent mat, capable of absorbing, dispersing and retaining liquids, can be produced in various shapes and dimensions and can include any of the liquid-absorbent materials commonly used in absorbent items.

The configuration and constructive characteristics of the absorbent mat may be various. However, the total absorption capacity of the absorbent mat must match the expected load, depending on the intended use of the absorbent item. Accordingly, the dimensions and absorption capacity of the absorbent mat are chosen according to the various applications.

In addition to the absorbent components, the absorbent internal region that lies between the filtering layer and the external layer can include additional components, as well-known in the art, such as layers of cotton wool, adhesives, and liquid distribution and acquisition layers.

It is well-known in the state of the art that the filtering layer must be preferably comfortable, soft to the touch and nonirritating for the user's skin. Moreover, since the filtering layer is permeable to liquids, it allows liquids to effectively penetrate its thickness. A wide range of materials, such as woven and non-woven materials, can be used in a suitable manner to manufacture the upper filtering layer.

As regards the filtering layer, when it is constituted by a non-woven fabric according to the present invention it is possible to use all the many techniques which are well-known in the art.

The external layer is impermeable to liquids and preferably comprises a thin plastic film, although it is also possible to use other flexible materials which are impermeable to liquids. The external layer prevents the exudates absorbed and retained by the absorbent mat from wetting the items with which they come into contact, such as sheets, shorts, pajamas and underwear.

The external layer can also be provided so that it is impermeable to liquids but permeable to vapors or breathable, thus allowing the vapors to escape from the absorbent mat while preventing the passage of the exudates.

This can be achieved, for example, by using a microporous film, as known in the current state of the art.

The dimensions of the external layer are generally determined according to the dimensions of the absorbent mat and of the particular absorbent item that has been chosen.

The external layer can be constituted by a plurality of laminated layers; in particular, it can comprise, on the external side directed toward the clothes, a layer of non-woven fabric in order to given a fabric-like tactile response to the absorbent product. The absorbent mat is preferably joined to the filtering layer, to the external layer or to both in any known manner.

For example, the external layer or the filtering layer can be fixed to the absorbent mat or to each other by means of a continuous uniform layer of adhesive or by means of a plurality of separate lines, separate spirals or separate spots of adhesive.

As an alternative, the means for mutually fixing the components of the absorbent product can be thermal bonds, pressure bonds, or ultrasonic bonds, mechanical dynamic couplings or any other fixing means or combination of said fixing means as known in the art. Since the filtering layer is commonly made of hydrophobic fibers, it is common to increase its wettability with a suitable treatment in order to prevent the exuded liquids from stagnating, flowing on the surface and causing leakage instead of being filtered toward the absorbent mat. This can be achieved by treating with a suitable surfactant the fibers used to produce the filtering element. Methods suitable for treating a filtering element with a surfactant include spraying a surfactant and immersion in a surfactant.

Brief description of the drawing In an embodiment of the present invention, the absorbent product is a baby diaper which is described in greater detail merely by way of non- limitative example of the present invention. With reference to the figures:

— Figure 1 is a plan view of an embodiment of an absorbent product according to the present invention;

— Figure 2 is an enlarged-scale sectional view, taken along the plane II- II, of a detail of the embodiment of the absorbent product according to the present invention of Figure 1.

Ways of carrying out the Invention In particular, said first embodiment is a baby diaper 10, showing in the foreground the internal surface, which is termed filtering element and is permeable to liquids. Said diaper 10 has a filtering element 11, an impermeable external layer 12 and an absorbent internal region (or absorbent mat) 13, which can be constituted by various layers, for example layers of cotton wool, fluff and highly absorbent polymer, known in the art as the acquisition layer, and is arranged between the filtering element 11 and the external layer 12; said absorbent internal region having a surface 14 which, during use, is directed away from the body, i.e., toward the clothes, a surface 15 which is directed toward the skin during use, lateral edges 16, a waist border 17, a first end region 18 and a second end region 18' which is arranged opposite to the first one. The diaper 10 also has elasticized regions 19 which close around the legs and a closure system 21, 21'. The diaper 10, shown in simplified form in Figures 1 and 2, is also provided with barriers 27 and 27' against leakage at each longitudinal edge 25.

The particular embodiment of the disposable absorbent product according to the present invention, i.e., of the baby diaper 10, shown in Figure 1 also has an external surface 22 and an internal surface 23 which lies opposite to the surface 22, a peripheral region 24 which is formed by the external edges of the diaper 10 in which the longitudinal edges are designated by the reference numeral 25, while the upper and lower edges, which wrap around the baby's waist during use. are designated by the reference numeral 26.

The external surface 22 of the diaper 10 constitutes the portion of the diaper 10 which is not in contact with the skin but is in contact with the clothes of the user, and is generally constituted by the external layer 12 and by any optional further components which can be joined to said external layer 12, such as for example the waist band of the closure system 21'.

The internal surface 23 of the diaper 10 constitutes the portion of the diaper 10 which is in contact with the skin of the user and is generally constituted by the filtering element 11 and by any other components which can be joined to the filtering element, such as for example the lateral leakage barriers 27 and 27'.

All the above-described embodiments are understood to be included in the scope of the present invention. However, other changes may be made with respect to these embodiments without abandoning the concept and the scope of the present invention.

Examples A protective and emollient material was prepared which contains 99% by weight of hydrogenated palm oil, 0.9% by weight of camomile oil and 0.1% by weight of vitamin E acetate by melting the hydrogenated palm oil at 48°C and adding the two additional ingredients, both of which are liquid. The resulting mixture was subjected to agitation for 15 minutes and then left to solidify at room temperature. For application to the absorbent product, the solidified mixture was melted at 48°C and applied to the filtering layer by contact (so-called "slot" technology).

The area involved in the application of the protective material was 0.0231 m² (length 350 mm, width 66 mm). The material was applied in the form of five bands 350 mm long, 6 mm wide and mutually spaced by 9 mm on either side of the longitudinal central axis of the product. The mixture, whose physical properties are dictated by the properties of the palm oil by which it is mainly constituted, was applied in an amount of 9 g per m². The hydrogenated palm oil has a melting point of 44-46°C, a viscosity of 40 mPa.s measured at 52°C with a Brookfield viscosimeter (20 rpm) and contains the following, expressed as fatty acid percentages: approximately 8% stearic acid, approximately 44% oleic acid, approximately 44% palmitic acid, approximately 1% lauric acid, approximately 1% myristic acid, and approximately 2% linoleic acid. The hydrogenated palm oil used has a melting point of approximately 45°C, is solid at room temperature and is not greasy to the touch. The iodine number of the hydrogenated palm oil used is approximately 40, the solid fat content at 20°C is approximately 81%, and the solid fat content at 35°C is approximately 40%. Tests conducted with the resulting absorbent product have shown that the applied protective material remains immobilized on the filtering element in storage conditions and until use, the absorption capacity of the product remaining unchanged over time. Moreover, comparison tests conducted with absorbent products having no protective and emollient material and with absorbent products obtained with the application according to the present example of protective material have shown that the absoφtion properties of the product are not negatively affected by the presence of the protective material, while the product provided with the protective material has an emollient and protective function for the skin.

The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept.

All the details may also be replaced with other technically equivalent elements. In practice, the materials used, so long as they are compatible with the specific use, and the dimensions and the contingent shapes may be any according to requirements.

The disclosures in Italian Patent Application No. MI99A000023 from which this application claims priority are incorporated herein by reference.

Claims

1. A disposable absorbent product comprising an absorbent mat which is arranged between an internal liquid-permeable filtering layer, which is directed toward the user's skin during use, and an external layer which is impermeable to liquids and optionally vapor-permeable and is directed toward the clothing during use, a protective and emollient material being arranged on said filtering layer, said material being partially transferred to the user's skin during use, said material being solid at 20 C, characterized in that said material comprises 95 to 100% of a mixture of natural triglycerides subjected to hydrogenation.

2. The absorbent product according to claim 1, wherein said material is substantially constituted by a mixture of natural triglycerides subjected to hydrogenation.

3. The absorbent product according to claim 1 or 2, wherein said mixture of natural triglycerides subjected to hydrogenation has a solid content of 60 to 90% at 20 C.

4. The absorbent product according to claim 1 or 2, wherein said mixture of natural triglycerides subjected to hydrogenation has a melting point between 35 and 60 C.

5. The absorbent product according to claim 1 or 2, wherein said mixture of triglycerides subjected to hydrogenation is constituted by palm oil subjected to hydrogenation.

6. The absorbent product according to claim 5, wherein said hydrogenated palm oil comprises, expressed as fatty acids, 5 to 15% stearic acid, 35 to 46% oleic acid, 43 to 47% palmitic acid, up to 2% linoleic acid, up to 1% lauric acid, and up to 1.5% myristic acid.

7. The absorbent product according to claim 1 or 2, wherein said mixture of triglycerides is applied to said filtering layer in an amount between 0.1 and 50 g per πr , preferably between 3 and 30 g per πr.

8. The absorbent product according to claim 1 or 2, wherein said mixture of triglycerides is applied discontinuously to a part of the surface of said filtering layer, said part being 50 to 600 mm long, preferably 200 to 400 mm long, and 20 to 400 mm wide, preferably 50 to 80 mm wide.

9. The absorbent product according to claim 7 or 8, wherein said mixture of triglycerides is applied in the form of bands which are mutually spaced and 2 to 10 mm wide.

10. The absorbent product according to claim 1, wherein said mixture of triglycerides receives the addition of up to 5% by weight of additives with lenitive and/or antioxidant properties.

11. The absorbent product according to claim 10, wherein said additives are chosen between camomile oil and vitamin E acetate.

12. The absorbent product according to claim 11, wherein said mixture comprises up to 0.9% by weight of camomile oil.

13. The absorbent product according to claim 11, wherein said mixture comprises up to 0.1% by weight of vitamin E acetate.

14. The absorbent product according to claim 1, constituted by a baby diaper.