JPH11513917A - Absorbent product having an odor control system containing silica, zeolite and absorbent gelling material - Google Patents

Abstract

  (57) [Summary] The present invention relates to absorbent products, and in particular to sanitary napkins having an odor control system incorporated therein to provide improved odor control benefits. The odor control system contains a combination of zeolite, silica and an absorbent gelling material.

Description

DETAILED DESCRIPTION OF THE INVENTION            Contains silica, zeolite and absorbent gelling material                      Absorbent products with odor control system                                Field of the invention   The present invention relates to sanitary products containing absorbent products, especially compositions that provide the advantage of odor control. For napkins and panty liners.                              BACKGROUND OF THE INVENTION   The primary focus of absorbent products is on the ability of these products to absorb and retain fluids. However, other important areas of development in this area are absorbed fluids and Is the suppression of odorous compounds in their decomposition products. Made of absorbent during use In the article, there may be a wide range of compounds that result in the production of malodors. these Compounds include fatty acids, ammonia, amines, sulfur-containing compounds and ketones. And aldehydes.   This technology uses various techniques used in absorbent products to address the problem of malodor generation. There are many descriptions of odor inhibitors. These drugs are typically They can be classified according to the type of smell they have. Smell is acidic, basic, Or classified as neutral. Acid odor inhibitors have a pH greater than 7, Types typically include inorganic carbonates, bicarbonates, phosphates and sulfates. Basic Scent inhibitors have a pH of less than 7, such as citric acid, boric acid and maleic acid. Including compounds such as formic acid.   Neutral odor inhibitors have a pH of about 7. Examples of such compounds are activated carbon, Includes clay, zeolites, silica and starch. Suppression of such neutral odor Antibiotics are most commonly used in absorbent products.   For example, EPO 348 978 discloses an absorbent product containing an odor control system And neutral odor inhibitors are carbon, clay, silica, zeolite and Selected from molecular sieves. EPO 510 619 is a zeolite and And a combination of at least two drugs selected from the group comprising silica gel and silica gel The present invention relates to an absorbent product containing the odor control complex. Similarly, WO 91/120 29 is a zeolite and absorbent gel to give an improvement in the control of ammonia odor Discloses combinations of chemical materials. ,   Carbon is particularly effective in this technology for a wide variety of odors. Is attracting attention. However, this is not preferred due to its black appearance, It is considered unacceptable. For example, EPO 282 287 Metal silicates and certain transition metals of aluminum containing silicates and Non-black (ie, carbon containing a metal salt selected from Group II metals) Disclosed is a deodorant that is suitably used for sanitary napkins.   Currently preferred odor control agents are zeolites, especially so-called medium and high zeolite. Olite. Although zeolites are not negative in their aesthetic appearance, their primary The disadvantage is the lack of effective odor control for a wide range of odor types. And the cost of these materials, especially medium and high zeolites.   Thus, it has an acceptable aesthetic appearance, such as a pale color, and is present in absorbent products. It provides effective odor control for a wide range of possible malodorous compounds and is less expensive. There is still a need to provide odor control agents or odor control systems.   Now, this requirement is for a specific set of zeolites, silica and absorbent gelling materials. It has been recognized that coping can be used. Surprisingly, this The combination of olilite, silica and absorbent gelling material has not been expected in the past. It has a synergistic odor control effect.                                Summary of the Invention   The present invention relates to a liquid-permeable topsheet, a backsheet and the topsheet. And an absorbent product having an absorbent core interposed between the backsheet and The absorbent product contains a zeolite, silica and an absorbent gelling material. It is characterized by containing a suppression system.                             Detailed description of the invention   The invention relates to absorbent disposable products such as sanitary napkins, baby diapers, Incontinence products and panty liners. The absorbent product of the present invention is liquid permeable Interposed between the topsheet, backsheet and topsheet and backsheet It has the essential feature of an absorbent core. This absorbent product also has the required structure. It has an odor control system as a component.                             Odor control system   According to the present invention, the absorbent product comprises, as essential features, zeolite, silica and An odor control system containing a combination of absorbent gelling materials. This smell suppression Controls are effective against a wide variety of odors typically found in absorbent products It has been shown to suppress odors.Absorbable gelling material (Absorbent gelling material)   Thus, the odor control system has an absorbent gelling material as an essential component. Most As is well known from recent product practice, absorbent gelling materials (sometimes referred to as "super -Called "super-sorbers") are widely used in absorbent products. It is increasingly used. AGM is a material having liquid absorbency. Such materials form hydrogels on contact with water (eg, urine, blood, etc.) I do. Highly preferred types of hydrogel-forming and absorbent gelling materials are polyacids, Particularly, it is a polyacrylic acid type. Hydrogel-forming polymeric materials of this type Absorbs fluids (ie, liquids), such as water or bodily fluids, , Thereby forming a hydrogel. These preferred absorbent gelling materials are Generally, substantially water-insoluble, prepared from polymerizable unsaturated acid-containing monomers Consists of a slightly crosslinked, partially neutralized hydrogel-forming polymeric material. This In such materials, the polymer component formed from the unsaturated acid-containing monomer is , May consist of an overall gelling agent or other types of polymer parts For example, it may be grafted on starch or cellulose. Acrylic acid Pressed starch material is this latter type. Thus, the preferred suction Yielding gelling materials are hydrated, acrylonitrile-grafted starch, Acrylic acid grafted starch, polyacrylate, maleic anhydride Ko Polymers and combinations thereof. Particularly preferred absorbent gelling materials are It is a starch grafted with acrylate and acrylic acid.   Whatever the nature of the polymer component of the preferred absorbent gelling material, These materials are generally slightly crosslinked. Crosslinking can be achieved with these preferred hydrogens. Acts to make the absorbent material forming the polymer substantially insoluble in water, and the cross-linking The gel volume and extractable polymer properties of the resulting hydrogel are Partially determined. Suitable crosslinkers are well known in the art, for example (1 A) compounds having at least two polymerizable double bonds; (2) at least one At least one agent that reacts with the polymerizable double bond and acid-containing monomer material of A compound having a functional group; (3) at least two agents that react with the acid-containing monomer material A compound having a functional group; and (4) a polyvalent metal compound capable of forming an ionic crosslink. Including. Crosslinkers of the type described above are disclosed in Masda et al .; U.S. Pat. No. 4,076,663; 19. It is more fully described on February 28, 1978. Preferred crosslinking agents are unsaturated Di- or polyester of mono- or polycarboxylic acid and polyol, bis Acrylamide and di- or triallylamine. Particularly preferred crosslinking agents are , N, N'-methylenebisacrylamide, trimethylolpropanetriacrylic And triallylamine. The crosslinking agent is generally about 0.001 mole It contains from cent to 5 mole percent of the preferred material. More preferably, the crosslinking agent is About 0.01 to 3 mole percent gelling as used herein Including materials.   Preferred slightly crosslinked hydrogel-forming and absorbent gelling materials are generally Used in their partially neutralized form. Purposes described in this specification For such a material, such a material is used to form the monomer used to form the polymer. At least 25 mole percent, preferably at least 50 mole percent, of the salt If the monomer is an acid-containing monomer that has been neutralized with a forming cation, Will be considered. Suitable salt-forming cations include alkali salts, ammonium, substituted Contains ammonium and amines. Utilized, which is a neutralized acid group-containing monomer The percentage of total monomer that is obtained is called the "degree of neutralization". Typically, commercially available The absorbent gelling material has a degree of neutralization somewhat less than 90%.   Preferred absorbent gelling materials used herein are encountered in absorbent products It has a relatively high ability to absorb fluid. This ability is based on the absorbent gel It can be quantified by referring to the “gel volume” of the chemical material. The gel volume is Determined by the amount of synthetic urea absorbed by the absorbent gelling agent buffer Defined as gram synthetic urea per gram absorbent gelling agent.   Gel volume with synthetic urea (see Brandt et al. Below) is about 0.1 -0.2 parts of the dry absorbent gelling material to be tested and about 20 parts of synthetic urea To form a suspension. This suspension has a swelling equilibrium Is maintained for about 1 hour at ambient temperature with gentle stirring. The gel volume (grams of synthetic urea per gram of absorbent gelling material) is then added to the suspension Of the weight fraction of the gelling agent in the gel and the volume of liquid excluded from the hydrogel formed. Calculated from the ratio to the total volume of the suspension. Preferred absorbency useful in the present invention The gelling material is preferably about 20 to 70 grams per gram absorbent gelling material, more preferably. It has a gel volume of about 30 to 60 grams of synthetic urea.   Another feature of the most preferred absorbent gelling material is the extractables present in said material. Level of different polymer materials. The extractable polymer level gives the desired absorption The sample of the functional gelling material is significantly longer to reach the extraction equilibrium with the synthetic urea solution. (E.g., at least 16 hours), and then forming the hydrogen Filter from the supernatant, and then finally determine the polymer content in the filtrate Can be determined by Extraction in preferred absorbent gelling agent buffers herein The specific procedure used to determine the possible polymer content is the blunt ( Brandt), Goldman and Inglyn (Ingl) in); US Patent 4,654,039; issued March 31, 1987, reissued 32. , 649. Absorbency particularly useful in the absorbent products herein The gelled material has an equilibrium extractables content in the synthetic urea that indicates that the gelled material Not more than about 17%, preferably not more than about 10% of the material.   The absorbent gelling materials described herein above are typically used in the form of discrete particles. Used. Such absorbent gelling materials include, for example, spheres or hemispheres, cubes, rods Any desired shape, such as a polygonal shape, may be used. Maximum size, like needles and flakes Shapes with a high modulus / minimum dimension ratio are also contemplated for use herein. Sucking Aggregates of collecting gelling material particles can also be used.   The size of the absorbent gelling material particles may vary over a wide range. industry For hygiene reasons, average particle sizes smaller than about 30 μm are less desirable. About 2mm Particles having a larger minimum dimension also cause the absorbent product to feel grainy, Not desirable from an aesthetic point of view of the consumer. In addition, fluid absorption is affected by particle size Sometimes. Larger particles have very low absorption. As used herein Preferably, substantially all of the particles have a particle size of about 30 μm to 2 mm. It is a high yield gelling material. As used herein, "particle size" refers to the smallest dimension of an individual particle. It means the weighted average of the method.   The amount of absorbent gelling material used in the present invention is typically 20 gm^-2 To 150gm^-2, Preferably 40 gm^-2To 110gm^-2, More preferably 5 5gm^-2To 85gm^-2It is.                          Zeolite smell inhibitor   Suitable zeolite odor control agents used in the odor control system of the present invention are And is described in the following reference books: Zeolite synthesis, A CS Symposium Series 398, M.C. L. Osselli and And H. E. FIG. Robson (1989), pages 2-7; zeolite Molecular sieves, structures, chemistry and uses; W. Breakfast Written by John Willie and Sons (1974), pages 245-250, 313- 314 and 348-352; latest applications of molecular sieve zeolites, S . M. Kuznicki doctoral dissertation, University of Utah (1980) Available from Icrofilm International University, Ann Arbor   Arbor), Michigan, pages 2-8.   Zeolites are crystals of Group IA and IIA elements such as Na, K, Mn, Ca Aluminosilicate, chemically empirical formula   M_{n / 2}O ・ Al_TwoO_Three・ YSiO_Two・ WH_TwoO Where y is greater than 2, n is the valency of the cation, and w Is the water content in the voids of the zeolite.   Structurally, zeolites are A atoms bound together by sharing oxygen ions. 10_FourAnd SiO_FourComplex crystalline inorganic polymers based on tetrahedral infinitely extending structures It is.   The structural formula of a zeolite is based on the crystalline unit cell, the smallest unit of the structure,   M_{x / n}[(AlO_Two)_x(SiO_Two)_y] WH_TwoO Represented by Here, n is the valence of the cation M, and w is the valence per unit cell. X and y are the total number of tetrahedra per unit cell, and y / x is the number of water molecules. It usually has a value of 1-5.   Zeolites may be naturally occurring or synthetically produced. Honcho In the textbook, synthetic zeolites are preferred for use, zeolite A, zeolite P , Zeolite Y, zeolite X, zeolite DAY, zeolite ZSM-5, And mixtures thereof. Most preferred are zeolite A and zeolite Y and mixtures thereof.   According to the invention, the zeolite is preferably hydrophobic. This is typically SiO_TwoAlO_TwoIncreasing the molar ratio of content to x so that the ratio of x to y Should also be 1, preferably 1 to 500, most preferably 1 to 6 Is achieved by   The absorbent product is preferably 40 gm^-2To 90gm^-2, More preferably 55 g m^-2To 85gm^-2, Most preferably 60 gm^-2From 65gm^-2The Zeorai of Contains                            Silica smell inhibitor   According to the present invention, the odor control system contains silica as an essential component. silica, That is, silicon dioxide, SiO_TwoExists in a variety of crystalline forms and amorphous transformations Can be obtained from both natural sources such as diatomaceous earth and synthetic sources; They are also suitable for use herein. Silica molecular sieve is used in this specification. Not included in the definition of silica used. In particular, they have a high surface area or Preferred forms of silica are preferred. Preferably, the silica is at least 90%, preferably Is Highly purified to contain 95%, most preferably 99% silicon dioxide In the form. Most preferably, the silica has a silica content of 100%. It is a gel.Alternatively, silica uses other sources, such as sodium silicate. Metal silicates.   Preferred silicas have a particle size of 4-12 μm and a pore volume of 1-2 g / ml Amorphous silica (eg, amorphous silica that appears to be free flowing in white), Or granular silica composed of aggregated particles (for example, a maximum of 1.6 mm in diameter) Silica gel having a particle size). More preferably between 40 ° and 150 ° Preferably between 60 ° and 130 °, most preferably between 90 ° and 110 ° Hole diameter, 100m^Two/ G to 800m^Two/ G, preferably 200 m^Two/ G to 5 50m^Two/ G, most preferably 250 m^Two/ M to 350m^Two/ G surface area and And having a mean particle size of 15 to 200 μm, preferably 63 to 200 μm. Kagel.   The absorbent product is preferably 40 gm on a 100% purity basis^-2To 100gm^-2, Yo More preferably 60 gm^-2To 90gm^-2, Most preferably 60 gm^-2To 65g m^-2Of silica.   The ratio of absorbent gelling material to silica to zeolite is typically from 1: 5: 1. 1: 1: 5, preferably 1: 3: 1 to 1: 1: 3, most preferably 1: 1: 1 From 1: 1.5: 1.5.   According to the present invention, the weight of the odor control system that can be used in the absorbent product is: Anyone skilled in the range of absorbent products can easily determine. For example When used for sanitary napkins or panty liners, 0.5 g of absorbent product To 5 g, preferably 1 g to 3 g, most preferably 1.5 g to 2.5 g Note that an odor control system can be included.   According to the present invention, odor control systems include, for example, antimicrobial agents, flavoring agents, masking agents Contains additional optional ingredients, such as activated carbon, chelants All of which are known to those skilled in the art.   The odor control system can be absorbed by any method disclosed in the art. May be incorporated into absorbent products, for example, laminated on the core of an absorbent product or It may be mixed into the fibers of the absorbent core. The odor control system preferably has two layers Of cellulose tissue. Optionally, For example, by means of a hot melt adhesive or some suitable bonding system, this system is It may be bonded between cellulose tissue layers.   More preferably, the odor control system is WO 94/01069 or Italian patent Incorporation in a layered structure according to the disclosure of application number TO 93A 001028 It is. TO 93A 001028 is the TO 93A 001028 in the present invention. Is a fibrous layer (120 mg) incorporated as an optional component.^-2Inside) Except for containing a higher amount of absorbent gelling material (AGM) in the interlayer, It describes a layered structure as qualitatively described in WO 94/01069. You. The middle layer may be, in particular, a heat-mixed with the premixed odor control system of the present invention. Contains polyethylene powder as a plastic material. The mixture is then Heat is applied so that the ethylene melts and glues the laminate layer and components together. It is. The bridges that form the points of attachment between the fibrous layers are thermoplastic with the AGM powder. Contains powders of conductive materials. (AGM's absorption capacity is not affected by bonding.) In the line, the edges of the laminate are stuck and the released odor control material is removed from the laminate. Preferably also located on the edge of the laminate to ensure that it does not fall .                                Absorbent core   According to the present invention, the absorbent core may include the following components: An optional primary fluid distribution layer, preferably with a secondary fluid distribution layer, (b) a fluid storage layer; ( c) an optional fibrous ("dusting") layer below the storage layer And (d) other optional components. According to the present invention, the absorbent core is envisioned Any thickness may be used depending on the end use being performed.                          aPrimary / secondary fluid distribution layer   One optional component of the absorbent core according to the present invention comprises a primary fluid distribution layer and Secondary fluid distribution layer. The primary fluid distribution layer is typically below the topsheet, The fluid is flowing between them. Top sheet is the final distribution to the storage layer For this purpose, the obtained fluid is transported to this primary fluid distribution layer. This primary fluid distribution layer The transport of fluids through is not only in the thickness direction of the absorbent product, but also in the length and width directions. It also happens along. This is also an optional, but preferred, secondary fluid distribution layer. Is below the primary fluid distribution layer and in fluid communication therewith. This secondary The purpose of the fluid distribution layer is to easily obtain fluid from the primary fluid distribution layer and quickly remove it. Transport to the storage layer. This means that the fluid capacity of the underlying storage layer is Help to be used for Fluid distribution layers are not typical for such distribution layers It may be made of such a material. In particular, the fibrous layer has squeezing as a distribution layer. Keep the capillaries between the fibers even when using                               bFluid storage layer   In fluid communication with the primary or secondary distribution layers, typically below these layers There is a fluid storage layer. The fluid storage layer may be made of any conventional absorbent material or It may consist of a combination of these. This is preferably a suitable carrier Consisting of an absorbent gelling material in combination with   Suitable carriers are materials conventionally used in absorbent structures, such as, for example, Modification or non-repair of natural, modified or synthetic fibers, especially in the form of fluff or tissue Contains regular cellulose fibers. Suitable carriers are used with absorbent gelling materials However, they can be used alone or in combination. Most preferred What is new is that tissue or tissue in the context of sanitary napkins or panty liners It is a tissue laminate.   One form of an absorbent structure made in accordance with the present invention is to replace the tissue with its own. It consists of a multilayer with a two-layer tissue laminate formed by overlaying It may be. These layers may be bonded, for example, by adhesive or by mechanical interlock. Or they may be connected to each other by a hydrogen bond. Absorbent gelling material or other May be provided between these layers.   Modified cellulose fibers, for example reinforced cellulose fibers, can also be used. Combination Synthetic fibers can also be used; cellulose acetate, polyvinyl fluoride, polyvinyl chloride Lidene, acrylic (eg Orlon), polyvinyl acetate, insoluble Polyvinyl alcohol, polyethylene, polypropylene, polyamide (e.g. Nylon), polyester, bicomponent fibers, ternary fibers, mixtures thereof, etc. Including. Preferably, the fiber surface is hydrophobic or treated to be hydrophobic. The storage layer may be made of a filler material such as perlite (P) to improve liquid retention. erlite), diatomaceous earth, vermiculite, etc. May be included.   If the absorbent gelling material is unevenly dispersed in the carrier, Nevertheless, the storage layer can be locally uniform, i.e. within the dimensions of the storage layer. It is possible to have a distribution gradient in one or several directions. Non-uniform distribution For carrier laminates that partially or completely wrap the gelling material Sometimes referred to.                  cOptional fibrous ("dusting") layer   Optional components for incorporation in an absorbent core according to the present invention are adjacent to the storage layer. A fibrous layer that typically meets beneath the storage layer. The underlying fibrous layer Typically referred to as a "dusting" layer. This is because during the manufacture of the absorbent core, Because the fibrous layer is the substrate on which the absorbent gelling material in the storage layer adheres. is there. In practice, the absorbent gelling material may be a fiber, sheet or strip, for example. In an example in the form of such a macrostructure, this fibrous "dusting" layer is included No need. However, this "dusting" layer creates an abrupt flow of fluid along the length of the pad. Provides some additional fluid handling capacity, such as quick wicking You.                   dOther optional components of the absorbent structure   The absorbent core according to the present invention may comprise other optional components normally present in absorbent fabrics. Element may be included. For example, a reinforcing fabric (scrim) may be used for each of the absorbent cores. It may be arranged in a layer or between layers. Such reinforcing fabrics are used for fluid transfer. It is preferred that the form be such that it does not form a barrier at the interface to transport. Thermal If the structural integrity that normally occurs as a result of the bond is given, the reinforcing fabric Objects are not normally required for thermally bonded absorbent structures.                             Top sheet   According to the present invention, the absorbent product has a topsheet as an essential component. The topsheet may be composed of a single layer or a plurality of layers. Good In a suitable aspect, the topsheet provides the user with a finished surface of the topsheet. A first layer and a second layer between the first layer and the absorbent structure / core.   The topsheet as a whole, so each layer individually fits the wearer's skin It must be soft and not irritating. Topsheet can be one way or two It may have elastic properties so that it can be stretched in any direction. According to the present invention, Sheet is available for this purpose and any material known in the art May be formed from woven and non-woven fabrics and films, for example. No. In a preferred embodiment of the present invention, at least one of the layers of the topsheet, preferably Alternatively, the upper layer is a hydrophobic, liquid permeable, perforated polymer film. Preferably The upper layer facilitates liquid transport from the wearer's finished surface to the absorbent structure Provided by a film material having holes provided therein. If it exists In this case, the lower layer is preferably a non-woven layer, a perforated film or a breathable (ai rlid) consist of tissue.                             Back sheet   According to the present invention, the absorbent product has a backsheet as an essential component. The backsheet is mainly composed of the effluent (ext) absorbed and contained in the absorbent structure. products contacting the absorbent product, such as pants, trousers, pajamas Prevent wetting of underwear and underwear. The backsheet is preferably liquid (eg, menstrual And / or urine) and is preferably a thin plastic Although manufactured from lum, other flexible liquid impervious materials can also be used. Book As used in the specification, the term "flexible" Mention materials that conform to the general shape and contours of the human body. The back sheet is also one It may have elastic properties so that it can extend in one or two directions.   The backsheet typically extends throughout the absorbent structure and provides a preferred support. Extend inside the id flap, side wrapping element or wing Some or all of them may be configured.   The backsheet is made of woven or non-woven material, such as a polymer film Polyethylene or polypropylene thermoplastic film or composite material For example, it may contain a non-woven material coated with a film. Preferably, The backsheet is about 0.012 mm (0.5 mil) to about 0.051 mm (2. 0 mil).   Representative polyethylene films are available from Ciopay, Cincinnati Under the name P18-0401 by Ohio, and Ethyl Co., Ltd., Visqueen department, Terre Haut (Terre Hout) e), manufactured by Indiana under the name XP-39385. Bakshi The sheet is preferably embossed and / or to provide a more cloth-like appearance Matt finish. In addition, the backsheet ensures that spills pass through the backsheet. Allows vapors to escape from the absorbent structure while preventing breathing, ie breathable It is. Also breathable with several layers, e.g. film and non-woven structure A back sheet may be used.                                  Example   The sanitary napkin used in the examples below is sold by Procter & Gamble. It is always sold (always is a registered trademark). Each napkin Wrap the wrap around the perforated coverstock on the bottom By cutting along the almost longitudinal edge of the release paper covering the external adhesive Opened. Then slightly move the moisture-impermeable plastic bottom layer The side of the absorbent fibrous core, and then the fibrous core onto the surface of the napkin itself. Along a plane parallel to the halves, each having approximately the same thickness. Smell control system, Distribute evenly between these two fibrous layers and then reconstitute the absorbent core. Join together to form   After that, return the moisture-impermeable inner backsheet to the initial position, and Wrap around the wrapped wrapper along the cut, for example with double-sided adhesive tape Sealed.   Using the above method, a sample containing the odor control system described below was prepared.   The zeolite used (0.5 g) was zeolite A, obtained from Degussa AG. Wesalith CS. Silica used (0.5g) Is Sylobla obtained from Grace GmbH. nc) 82 or silica FK 700 obtained from Degussa. use AGM (0.7 g) was XZ9589001 obtained from Dow Chemical. Was.

────────────────────────────────────────────────── ─── Continuation of front page    (81) Designated countries EP (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, L U, MC, NL, PT, SE), OA (BF, BJ, CF) , CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG), AP (GH, KE, LS, MW, S D, SZ, UG), UA (AM, AZ, BY, KG, KZ , MD, RU, TJ, TM), AL, AM, AT, AU , AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, G B, GE, GH, HU, IL, IS, JP, KE, KG , KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, N O, NZ, PL, PT, RO, RU, SD, SE, SG , SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU

Claims (1)

[Claims] 1. An absorbent product having a liquid-permeable topsheet, a backsheet and an absorbent core interposed between the backsheet and the topsheet, wherein the absorbent product napkin is composed of zeolite, silica and an absorbent gelling material. An absorbent product having an odor control system containing: 2. The zeolite, absorbent article of claim 1 wherein the ratio AlO ₂ of SiO ₂ is at least 1. 3. The zeolite, absorbent article of claim 2 wherein the ratio AlO ₂ of SiO ₂ is 500 1. 4. The absorbent product according to any one of the preceding claims, wherein the zeolite is selected from zeolite A, zeolite Y, zeolite DAY, zeolite ZSM-5 and mixtures thereof. 5. The absorbent product according to any one of the preceding claims, wherein the zeolite is zeolite A and zeolite Y and mixtures thereof. 6. An absorbent product according to any preceding claim, wherein the weight ratio of the absorbent gelling material to silica to zeolite is from 1: 5: 1 to 1: 1: 5. 7. The absorbent product according to any one of the preceding claims, wherein the absorbent product contains 0.5g to 5g of the odor control system. 8. The absorbent product according to any of the preceding claims, wherein the product comprises from 40 gm- ² to 90 gm- ² zeolite. 9. The absorbent product according to any of the preceding claims, wherein the product contains from 40 gm ^{- 2} to 100 gm- ² of silica. 10. An absorbent product according to any preceding claim, wherein the product contains from 20 gm- ² to 150 gm- ² of the absorbent gelling material. 11. The absorbent product according to any one of the preceding claims, wherein the absorbent product is a sanitary napkin or panty liner.