JPH10502009A - Absorbent product with blade core structure - Google Patents

Abstract

(57) Abstract: An absorbent product such as a sanitary napkin is provided. The sanitary napkin of the present invention has a substantially non-absorbent braided core structure.

Description

DETAILED DESCRIPTION OF THE INVENTION                     Absorbent product with blade core structure                                Field of the invention   The present invention relates to absorbent products, particularly absorbent products such as sanitary napkins. Sa More particularly, the present invention relates to a sanitary napkin having a blade core structure.                                Background of the Invention   Different types of disposable absorbent products used to collect body waste Are well known in the art. Commercially available absorbent products include diapers and large Contains incontinence products for men, sanitary products and bandages. This type of disposable product dispenses liquid It has parts for receiving, absorbing and holding. Typically, such products are liquid permeable tops. A backsheet, an absorbent core and a liquid impermeable backsheet.   One of the main goals in developing disposable absorbent products is to use the overall performance of the absorbent product. It is to use. Typically, products of the type described above are top-sealed in a circular pattern. Dispense the accumulated liquid. Such structures have a certain length beyond their width. Liquid before the end area of the absorbent product is completely used. The longitudinal side edge of the article is reached. When the liquid reaches the longitudinal side edge of the absorbent product This is due to the fact that there is an absorbent product available in the end area of the absorbent product. Increase the chance of liquid leakage from the side of the product.   In the past, in an attempt to further utilize the absorbent performance of absorbent products, There have been many attempts to stream. Many of these efforts are made by absorbent means or Increasing the density of collection devices has been used. Some such efforts are U.S. Pat. No. 4,678,453 granted to Holtman on July 7, 1987. And U.S. Pat. No. 4,624, issued Nov. 25, 1986 to DeRosette et al. , 666. However, absorbers that usually direct the flow of waste Absorbent products that use a means may impair the ability of the absorbent product to saturate and direct liquids There are drawbacks that tend to.   Thin sanitary napkins with sufficient performance to handle large volumes of physiological fluid flow Further distributing and using the absorption of physiological fluids or bodily excretions in To Osborne on August 21, 1990 and April 23, 1991, respectively. U.S. Patent Nos. 4,950,264 and 5,009,653, issued. No. Distribution of sanitary napkin excretion shown in these reference examples, Using a "wipe acquisition sheet" to distribute the excrement evenly over the absorbent core below At least in part can be achieved.   Other sanitary napkins use intermediate fiber capillaries, especially on the outer surface for carrier liquids Other sanitary napkins using fibers have been developed. Such sanitary napkins Examples are PCT International Publications WO93 / 01779 to WO93 / 01783 and W093 / 02251, all of which are incorporated herein by reference. It has been incorporated. Some of these publications are available in tuft bundles (or 3) shows a sanitary napkin using capillary groove fibers arranged in the form of ()). these The sanitary napkin shown in the International Patent Publication works very well. However Capillary furrow fibers are very expensive to use in disposable absorbent products. Therefore Research on other sanitary napkins continues.   Other types of absorbent products are known. For example, granted to Fitzgerald U.S. Pat. No. 4,361,151 issued from Blade Silver, an absorbent material. Figure 4 shows a tampon formed. Fitzgerald tampon blade construction The structure is hydrophilic and acts as the main absorbent member of the tampon. However, It's Gerald's patent describes a sanitary napkin that improves the use of overall performance. No napkin or structure is shown.   Therefore, the performance of the entire sanitary napkin is further utilized, and an absorption mechanism for liquid distribution is provided. Sanitary napkin having another type of liquid distribution mechanism for directing liquid for use Needs exist.   Accordingly, it is an object of the present invention to provide an improved distribution of waste through an absorbent core of a product. It is to provide a disposable absorbent product having a different mechanism.   It is another object of the present invention to provide a system that does not saturate and does not interfere with liquid distribution performance. An object of the present invention is to provide an absorbent product having a mechanism for distributing body waste.   Another object of the present invention is to provide an absorbent material having the above-mentioned characteristics which is easily manufactured at a low cost. To provide goods.   These and other objects of the invention will be considered when taken in conjunction with the following description. Will become more readily apparent when describing in the context of                                Summary of the Invention   The present invention provides an absorbent product such as a sanitary napkin having a blade core structure. It is to be.   Sanitary napkins have a body side, an underwear side, a longitudinal centerline and a transverse center. With a line. The sanitary napkin includes a liquid-permeable top sheet and the top sheet. A liquid-impermeable backsheet connected to the topsheet, an absorbent core, and the topsheet. At least one blade core structure disposed between the back core and the back sheet. Blade core structure is nearly non-absorbent (ie, does not absorb liquid and is permanently retained Do not carry liquid along its length and transfer such liquid to the absorbent core. Is preferred.                                Description of the drawings   This specification particularly points out and distinctly claims the subject matter which constitutes this invention. Ending in a box, but can be better understood from the following description in connection with the accompanying drawings. There will be.   FIG. 1 is a plan view (partially broken) of a preferred sanitary napkin according to the invention. FIG.   FIG. 2 is a cross-sectional view of the sanitary napkin shown in FIG. 1 taken along line 2-2. You.   FIG. 3 shows a sanitary napkin having a blade core structure of another configuration, and FIG. It is sectional drawing cut | disconnected from the same angle.   FIG. 4 is a perspective view of a part of a conventional blade structure.   FIG. 5 is a perspective view of a part of the flat blade structure.   FIG. 6 is a sectional view of a blade core structure having a sectional shape of numeral 8.                             Detailed description of the invention   1. General characteristics of absorbent products   The preferred embodiment of the present invention upon disposable absorption is as shown in FIGS. It is a sanitary napkin 20. The present invention has a specific configuration as shown in the drawings. It should be understood that it is not limited to utility napkins. Also, the present invention provides Women's sanitary products or sanitary pads or diapers, such as iraina, incontinence pads It can be applied to other absorbent products such as.   The sanitary napkin 20 shown in FIGS. 1 and 2 has two surfaces, a body contact surface. Or it has a "body surface" 20A and an underwear surface 20B. The sanitary napkin 20 is It is shown in FIG. 1 when viewed from the body surface 20A. Body surface 20A should be adjacent to the wearer's body The underwear surface 20B (shown in FIG. 2) is on the opposite side and is When the kin 20 is worn, it is arranged adjacent to the wearer's underwear You. The sanitary napkin 20 has two centerlines: a longitudinal centerline L; It has a transverse centerline T. The term "longitudinal" as used herein refers to sanitary napkins. Vertical plane that divides the body of the wearer who stands upright when wearing it Refers to the line, axis or direction of the plane of the sanitary napkin 20 (almost parallel) aligned with U. The terms “transverse” or “lateral” as used herein are used interchangeably. A line, axis or line lying in the plane of the sanitary napkin 20 perpendicular to the longitudinal direction. Say the direction.   FIG. 1 also shows that the longitudinal edges (or "side edges") are designated by reference numeral 22. , A peripheral edge 26 defined by an edge (or edge) designated by reference numeral 24. 1 shows a sanitary napkin 20 having the same. The sanitary napkin has a first end region 2 8 and two end regions 30 designated by a second end region 30. Central area 32 is located between the end regions 28 and 30. The end regions 28 and 30 About 1/8 to about 1/3 of the length of the sanitary napkin, outside the edge of the central region 32 Is growing. A detailed description of the central region 32 and the two end regions 28 and 30 No. 4,690,680, issued to Higgins in September 1987. Have been.   The sanitary napkin 20 includes a liquid-permeable topsheet 38 and a topsheet 38. Connected liquid impermeable backsheet 40, topsheet 38 and backsheet 40, and one or more blade core structures 44. The sanitary napkin 20 may also include one or more additional layers or Has a member. The core layer or second topsheet is an integral part of the topsheet Either the main part or the separating member located between the topsheet and the absorbent core is there. Further, the sanitary napkin 20 is provided with a panty fixing connection (shown in FIGS. 2 and 3). It has at least one panty fastener such as a dressing strip 50. add to A typical release paper 52 covers the adhesive strip 50. Release page Before use of the sanitary napkin 20, the par 52 is placed on the surface of the underwear other than the crotch portion. To prevent the napkin 20 from sticking. These individual parts of the sanitary napkin Consider the material in more detail.   2. Individual components of sanitary napkin   A. Top sheet   The topsheet 38 as shown in FIGS. 1 and 2 faces the body to the wearer, It is the part that comes in contact with it and first receives bodily waste.   Topsheet 38 is liquid permeable, flexible and does not irritate the skin It is. The term used here is flexible and easily adapts to the shape of the body, the presence of external forces Refers to a material that easily deforms. Top sheet 38 is a good strike Roof and low-wet characteristics, and bodily exudates Easily penetrates and moves to the absorbent core 42, but through the topsheet 38 to the skin of the wearer. Does not reflux to skin. The topsheet 38 should make a sound so that the wearer does not notice. It is good. The topsheet 38 is hygienic, has a clean appearance, and has an absorbent core 42. It is somewhat opaque as it masks the collected bodily waste that has been absorbed.   Suitable topsheets 38 include woven and nonwoven fabrics, porous molded thermoplastic films, Perforated plastic and hydrofoam thermoplastic films Limmer material, porous foam, reticulated foam, reticulated thermoplastic Such as flexible film, thermoplastic scrime or composite of materials of the type described above It can be manufactured from any of a wide range of materials. Suitable woven and non-woven fabrics include natural fibers ( For example, wood or cotton fiber), synthetic fiber (for example, polyester, polypropylene) Polymer fibers such as ren or polyethylene fibers) or natural and synthetic fibers Composed of combinations.   The preferred topsheet 38 has a perforated formed film. Effective molded film Is preferred for the topsheet. Because they are Permeable, if appropriate porous, if appropriate porous Reduces the tendency of the liquid to pass through the wearer's skin and re-wet. Therefore The surface of the molded film that comes in contact with the body remains dry, preventing the body from becoming dirty. Stop And give the wearer a more comfortable feeling. A properly formed film is 19 U.S. Pat. No. 3, issued to Thompson on December 30, 1975. 929,135 U.S. Patent No. 4,324,24, issued to Mullen on April 13, 1982. No. 6,342,31 issued to Radel et al. On Aug. 3, 1982. No. 4,463,078 issued to Earl et al. On July 31, 1984. No. 45, U.S. Pat. No. 4,629, issued to Kro et al. U.S. Pat. No. 5,006,643, issued Apr. 9, 1991 to Bird. No. 394. The preferred topsheet of the present invention is Proctor & Gear. Marketed as sanitary napkins as "DRI-WEAVE" And are shown in one or more of the patents mentioned above.   Preferred topsheets of the present invention are described in one or more of the patents mentioned above. "DRI-WEAVE as Procter & Gan This is a molded film commercially available on Sanitary Napkin by Bull.   In a preferred embodiment, the topsheet 38 is less than if the liquid is not hydrophilic. Furthermore, the topsheet is hydrophilic so that it transfers quickly. This is due to the absorption core Reduces the likelihood of the body flowing out of the topsheet than is absorbed. This Topsheets like (fibrous topsheets) are made by surfactant It can be hydrophilic. A suitable method of applying surfactant is to Osborne U.S. Pat. Nos. 4,950,254 and 5,009,653 issued. Have been.   B. Absorbent core   (1) General   Absorbent core 42 is used for liquids such as vaginal discharge (menstrual fluid) and other bodily excretions. Is an absorbing means that can absorb and hold the water. As shown in FIG. 1 and FIG. , The absorbent core 42 has a body surface, an absorbent surface, side edges and edges.   The absorbent core 42 can be of a wide variety of sizes and shapes (eg, rectangular, oval, hourglass, Liquid absorbent material used in sanitary napkins and other absorbent products Manufactured from raw materials.   A suitable material for the absorbent core 42 is a finely divided wood pouch called air felt. Creep cellulose wadding, tissue wrap and tea Has tissue with thin tissue layer, crimped polyester fiber, coform Melt blown polymer, chemically cured and deformed or cross-linked cellulosic Fiber having inner fiber capillary passage (capillary passage fiber) on the outer surface, peat moss Absorbent foam, absorbent sponge, superabsorbent polymer gel forming material, or Equivalent materials, or suitable equivalent materials, and mixtures of these combinations.   Suitable cross-linked cellulosic fibers are available from U.S.A. This is described in more detail in US Pat. No. 5,217,445. Suitable capillary passage fibers Wei is described in US Patent No. 5,200,248, issued to Thompson et al. Has been stated. Suitable foam materials are available on December 7, 1993, November 1993. US Patent Nos. 5,260,345 and 5,26 issued to Desmaras on September 9 No. 8,224 and U.S. Pat. 147,345.   Polymer gel material is a particularly preferred absorbent for use in absorbent core 42. The polymer gel material comes into contact with water or bodily fluids (ie, liquids), It is a material that absorbs such liquids and forms a hydrogel. In this way, the absorption The liquid drained to the core 42 is acquired and retained by the polymer gel material, Thereby providing improved absorbent performance and / or improved fluid retention performance You. A suitable absorbent gelling material is disclosed in U.S. Patent No. R, issued April 19, 1988. U.S. Pat. No. 5,1 issued to Law et al. on April 7, 1992 in US Pat. 02,597. A suitable thin layer of absorbent gelling material will be -Purchased from Grain Processing Company of Maskachin, Iowa under L535.   Various examples of absorbent structures suitable for use as the absorbent core of the present invention are described in 1986. U.S. Patent entitled "Absorbent Thin Layer Structure" issued to Kramer et al. No. 4,578,068, issued to Wiseman on September 9, 1986 U.S. Pat. No. 4,610,678 entitled "Abstract Structure", Feb. 3, 1987. U.S.A. entitled "Equipment for Forming Airlaid Webs Published by Lawsen et al." Patent No. 4,640,810 issued to Alemeni on March 30, 1989. U.S. Patent entitled "High Density Absorbing Member with Low Density and Low Basis Weight Gaining Region" No. 4,834,735, issued Aug. 21, 1990 and Apr. 23, 1991. U.S. Pat. No. 4, entitled "Thin Flexible Sanitary Napkin" to Suborn. 950,264 and 5,009,653, Dunk and other names in January 1986 Published European Patent Application No. 0 198 683 and U.S. Pat. Application No. 07 / 810,774 and issued on December 17, 1991 under the name of Cree No. 07 / 944,764 entitled "Absorptive material having a fuse layer" (P. CT Patent Publication WO 93/11725), which was filed on May 6, 1994. No. 08 / 239,084, incorporated by reference.   The shape and structure of the absorbent core 42 can be varied in different embodiments. For example, absorption The core has a variable thickness region (eg, the core is contoured such that the center is thicker) Has a hydrophilic gradient, superabsorption gradient or lower density and lower average basal weight gain area Or has one or more layers or structures. However, absorption The absorption performance of the material core 42 must be consistent with the design load and application. No. Furthermore, the absorption performance of the absorbent core 42 is the same as the incontinence pad, the panty liner, For different applications such as sanitary napkins or day / night sanitary napkins Changes.   (2) Cross-linked cellulose fiber thin layer core   One particularly preferred absorbent core 42 is a superabsorbent polymer material (or absorbent gel). Material) and one or more sheets or webs of cross-linked cellulose A thin layer of fibers. Preferably, the absorbent gelling material in such a thin layer structure Is located between two layers of crosslinked cellulose fibers.   In such an embodiment, the layer of crosslink fibers comprises particles of absorbent gelling material. Have a single sheet enclosing the layers. The sheet is "e" when viewed from the edge Enclosed to appear to have a shape. In another embodiment, the lamina is 1 In different layers of the absorbent core rather than one sheet, the cross-linked cellulosic material ( Or other separated webs of absorbent material or materials). Or can be formed by a number of methods, such as providing an additional layer to a thin layer .   C. Back sheet   The backsheet 40 is a sanitary nap such as a wearer's pants, pajamas and underwear. The product that comes into contact with the kin 20 may be absorbed by the excrement absorbed by the absorbent core 42. And prevent. The back sheet 40 is for liquid (vegetables and / or urine) It is permeable. The backsheet 40 is made from a thin plastic film Preferably, other flexible liquid material materials can be used.   The backsheet 40 is made of a woven or non-woven material, polyethylene or polypropylene. Polymer film, such as thermoplastic film of pyrene, or no film coat Having a composite material such as a woven material. Preferably, the backsheet 40 is about 0.0,0 12 mm (0. 5 mils) to about 0. 051 mm (2. 0 mil) It is a polyethylene film. An exemplary polypropylene film is trade name P18 Under the name -401, by Cropey of Cincinnati, Ohio, the trade name XP- By Teledelga Film Products of Terre Haute, Indiana under 39385 Manufactured.   The backsheet 40 may be embossed and / or embossed to provide a more cloth-like appearance. Alternatively, it is preferable to perform a mat finish processing. Further, the back sheet 40 is The steam can escape from the storage core 42 (that is, the back sheet 40 Zable) to prevent excrement from passing through the back sheet 40. The path described here Or a biodegradable battery Worksheets can be used.   D. Blade core structure   1 and 2 show that the sanitary napkin has a blade core structure (or “blade structure”). The sanitary napkin 20 has at least one core member such as Three separate blade structures 4 arranged between the core 42 and the backsheet 44 4A, B and C. The blade structure shown in FIG. 1 and FIG. And are stacked in a pyramid-like configuration. The blade structure 44 is a sanitary nap Preferably, there is a center along the longitudinal centerline of the kin.   As used herein, the term "braid structure" Is manufactured by twisting several strands of material 54 together. Say something. Preferably, the blade structure used in the present invention has three or more blade structures. With upper strands, typically consisting of about 5 or 6 strands of material . Blade structure forms tape, cord, string or twin-like structure Can be used for In the present invention, a braided core structure is formed. The strands of material 54 that are to be braided from a large number of individual fibers 56 Sliver or tow. Each sliver or tow is twisted and shaken The strand 54 to be incorporated in the id structure 44 is formed. Sliver or tow Consisting of a suitable number of fibers and of suitable size. In a preferred embodiment, the individual Have a thickness of about 1-3 denier. Slivers or tows are made of hundreds of fibers. With fibers 56 (eg, about 400 fibers), between about 100 and about 2,500 of Has overall denier.   The strike of the material 54 forming the braid structure (and thus the entire braid structure 44). The lands are either hydrophilic or hydrophobic. Hydrophobic materials are liquid Used for the blade core structure 44 because it is transported through the gap between the Suitable for As another example, some of the strands 54 are hydrophobic, Some of the strands are hydrophilic (in this case, the blade structure 44 is partially It is hydrophobic and partly hydrophilic. ) Strand 5 having blade structure 44 4 have one material or different materials.   Fibers 56 with strands 54 ensure that no liquid is absorbed inside the fibers. In addition, it is non-porous and hydrophobic. The surface of the fiber 56 is hydrophobic or hydrophilic. Preferably, the fibers of the strands 54 that make up the braid structure are easily and sufficiently large in quantity. It is preferred that the surface of the fibers be hydrophilic so as to move the liquid. Blade structure The surface of the fibers 56 forming the strands 54 of the same type is hydrophilic in nature or of the same parent. Treated to be aqueous (with a surfactant). Furthermore, the blade structure 4 4 is a capillary passage wetted by a liquid such as blood or urine that needs to be transported. It may have fibers 56 with channels. The fibers 56 with the strands are circular Are slippery or they are woven (ie they are Protruding from). Fiber 56 is polyethylene, polypropylene, polyester Such as cotton, rayon, ORION or other suitable natural or synthetic material Formed from ingredients. In a preferred embodiment, strands 54 are made of polypropylene. Has fibers.   The fibers 56 and the strands 54 constituting the blade structure 44 are the same as those of the blade structure 4. Preferably, they are arranged in a continuous mode between the four ends. Fiber of blade structure 44 The fibers and strands are arranged closely enough together to form a core groove You. The strand 54 forming the blade structure 44 has an appropriate cross-sectional shape. Suitable cross-sectional shapes include circular, elliptical, rectangular, flat, triangular, irregular, etc. But is not limited to it. Strands 54 having a blade structure have the same cross-sectional shape Or have different cross-sectional shapes.   The blade structure 44 has a predetermined length and width. The length of the blade structure 44 is Depends on product needs and design. The length of the blade structure 44 is about 1 inch. H (about 2. 5cm) to the length of the sanitary napkin (or other absorbent product) This is a preferred range. The radius of the blade structure 44 is equal to the central axis A of the blade structure. To the dimension R of the side wall of the blade structure (that is, one of the actual width W of the blade structure). / 2). The radius R of the blade structure 44 is about 0.5. 05 inches (approx. 13c m) to about 1 inch (about 2. 5 cm). 1 inch (approx. 3cm) From about 0. 5 inches (about 1. 3 cm) is preferred. The actual width W is about 1 / 4 inches to 1 inch (approx. 6 cm to about 2. 5 cm) is preferred. 1 If more than one blade structure, each blade structure is the same or different The dimensions.   The blade core member 44 may have one blade structure or a plurality of blade structures (for example, (For example, a plurality of parallel blade structures as shown in FIGS. 1 to 3). . The blade structure used in the present invention has many possible overall shapes. these These are conventional blade structures (as shown in FIG. 4), generally circular in shape. Blade structure with cross-sectional shape, flat circular or elliptical cross-section, (shown in FIG. 5) A blade having a flat blade structure and a cross section of "shape of FIG. 8" (shown in FIG. 6) Blade structure, the braid or other structure inside the braid structure, and hold the center down Including, but not limited to, a tubular braid structure (FIGS. 1-3). flat A flexible blade structure can be formed initially as a flat structure or cut into a flat structure. Including those released and released.   The blade structure 44 is used as a sanitary napkin member in which liquid accumulates on the blade structure. Preferably, it is maintained in contact. In addition, at least the blade structure The end is in close contact with the absorbent core 42 to transfer the liquid to the absorbent core 42. Will be retained. This can be achieved by a number of suitable mechanisms. these Is attached to other parts of the sanitary napkin by pulling force or by adhesive. By bonding, the blade structure 44 is brought into contact with an adjacent member such as an absorbent core. Including but not limited to maintaining. Adhesive suitable for this purpose And a detailed description of the applicable shapes can be found in the patent application incorporated herein by reference. Be sent out.   Blade core structure 44, when placed under the absorbent core, operates as follows. It is preferred to use The liquid waste collects in the central area of the absorbent core 42. absorption Some of the liquid that has accumulated in the core 42 is absorbed by the core. Other liquids It passes through the receiving core 42 and contacts the blade core structure 44. These liquids The core structure transfers to the part of the absorbent core that has additional performance. The core is Presents a strong suction which tends to draw liquid from the blade structure 44 up to the maximum capacity , Which results in the transfer of the liquid dispensed by the blade structure 44 to the absorbent core. Good. Therefore, the absorbent core 42 serves as a storage chamber for the liquid conveyed from the blade structure 44. Act. This means that at least one of the blade structures 44 is ready for the next liquid injection. Make the part "new again".   There are several advantages to using a blade core structure. The blade core structure 44 Compared to fiber and non-woven bats currently used to penetrate liquids A well-defined core passage is provided for the acquisition distribution structure. The blade structure is It has well-defined capillaries between the strands. The blade structure makes it sanitary Make sure that the liquid waste is more accurately directed to the desired part of the napkin. Well-defined shape (ie, better penetration of liquids towards the edges of the structure) (A side and an end having a defined core structure).   The blade structure transports liquid on the surface of the strand or There is the advantage of transporting the liquid between them. Blade structure for transporting liquid between strands The ability of the blade structure to be similar to the capillary passage fiber with respect to the liquid penetration properties of the blade structure The structure can work. That is, the penetration properties of the nonwoven fabric or fiber With some voids that change under pressure, such as capillary voids between bat fibers Rather, it depends on the relatively fixed gap between the strands. This is a liquid Easy and quick acquisition, weight of the wearer and other forces acting on the sanitary napkin during wear Allows liquid transport under pressures such as those associated with Therefore, the fiber The core structures in the form of ebs or bats have a 0. 01 to 0 , 045 cc / sec in the liquid volume range Is dramatically reduced when placed under such pressure. On the other hand, The blade extensible region structure used is applied under pressure (applied by the adult body ) When under such pressures as 1 psi (eg, , 0. 033 grams / second).   Blade structures have other advantages for transporting liquids. Blade structure is the same material Liquids can be transported between materials, or from one type of material to another. The liquid can be transported to the material of the pipe. In addition, the blade described here The structure can carry a liquid having a range of viscosities. These bray The structure is low (such as liquids with viscosities ranging from the viscosity of physiological fluids to urine) Particularly suitable for conveying liquids of viscosity to intermediate viscosity. Also, blade structure Easily dehydrates into large suction (large capillary action) material and removes all liquid Continue to drain the liquid itself until it travels through the gap between the fluids.   Another advantage of the present invention is that the blade structure is relatively soft and flexible. You. Furthermore, the fiber formed in the blade structure, and the blade structure formed thereby Construction is easy to manufacture, handle, and process (ie, into an absorbent product) is there.   Other embodiments for the sanitary napkin shown in FIGS. 1 and 2 are possible. No. As shown in FIG. 1, the blade structure 44 is oriented in the longitudinal direction of the sanitary napkin. Therefore, the center coincides with the center line T in the transverse direction. However, in other embodiments, And the blade structure 44 has a transverse centerline (ie, Backward). If the blade structure 44 is displaced from the transverse center line If so, at least a portion is located in the central region 32 of the sanitary napkin 20. Preferably, they are arranged as follows. In another embodiment, the blade structure 44 is The liquid can be directed in other directions required for movement within the napkin.   As shown in FIG. 1 and FIG. 2, the blade structure 44 is It is arranged between the seat 40. In another embodiment, the blade structure is Between the topsheet 38 and the absorbent core 42, a part of the absorbent core, such as a core. Part of the material can be located outside of such components. The blade structure Preferably, when the absorbent core has a thin layer, it is arranged above the absorbent core. The reason for this is that the liquid in the Z direction (i.e., through their thickness) Does not penetrate much, so unless the blade structure is on top of the core, The liquid is difficult to reach the blade core structure, where it is It becomes difficult to perform the osmotic action. The blade structure 44 is located above the absorbent core. When placed in a closed position, the blade structure 44 is placed in close contact with the wearer's body. Is placed. Even more advantageously, the braided structure 44 is small in the space between the labia of the wearer. It is at least partially sized and shaped to fit. This is the body of the wearer Excretion that exits the body can be more easily blocked.   In another embodiment, the blade structure 44 is a topsheet or a topsheet. Can act as part of In another embodiment, the blade structure 44 comprises , Used to contain bodily waste (in addition to or in place of another absorbent core) Can be The blade structure described here is effective when performing the main liquid action It is. Because when they move the liquid towards the desired storage location, It can contain up to about 10 times the excretion from the body. Therefore, the blade The fibers 56 of the structure 44 are usually non-absorbable (ie, they absorb liquids inside). No), the blade structure 44 transports the liquid to a large suction member. If the guide structure 44 is placed in an absorbent product where there is no advanced suction member, The raid structure 44 contains body fluid. In another embodiment, a blade structure 44 serves more than one other member of the sanitary napkin.   E. FIG. Assembly of sanitary napkin members and use of sanitary napkin   Such as topsheet, backsheet, blade structure, absorbent core and other parts Sanitary napkin parts are available in “sandwich”, “tube” and side It can be assembled in various known shapes (including wrapped shapes).   The member of the sanitary napkin has a top sheet, a back sheet, and each has a layer. The absorbent core, located between the topsheet and the backsheet, and in contact with the absorbent core Preferably, the blade structure is assembled in a sandwich configuration. Top The seat and backsheet have their perimeters extending beyond the perimeter of the absorbent core, The dimensions are preferably such that they are sealed together by a seal 90.   The parts of the sanitary napkin 20 are held together in a suitable manner. Sanitary napkin The components of the housing 20 may include adhesives, stitching, heat and / or pressure bonding, dynamic mechanical bonding. Ultrasonic bonding, melt blown fibers so that one part overlaps the other Or with fiber or sanitary napkin parts by methods known to those skilled in the art. Together by intermingling or entanglement of other structural parts Can be fixed.   Suitable methods of attaching sanitary napkin parts are incorporated herein by reference. Described in published patent applications and publications.   The sanitary napkin 20 of the present invention is obtained by removing the release liner 52. Thereafter, the adhesive (or other fastener) 50 contacts the panties and the pan during use. Sanitary napkin on panty to keep sanitary napkin in place in tee Used by arranging the components 20.   F. Additional features and other types of absorbent products   Although the preferred embodiment of the sanitary napkin of the present invention has been described, in this embodiment, Shows various sanitary napkins. These have the blade structure of the present invention. I have. Some such sanitary napkins were available on March 30, 1982. U.S. Pat. No. 4,3,311 issued to U.S. Pat. No. 21,924, “Composite sanitary treatment granted to Desmaras on January 10, 1984 U.S. Pat. No. 4,425,130 entitled "Napkin", Aug. 21, 1990. U.S. Patent No. 4,950,264 to Osborne, April 1, 1991 United States titled "Decouple Sanitary Napkin" given to Osborne et al. Patent No. 5,007,906 issued to Osborne on April 23, 1991 The aforementioned U.S. Pat. No. 5,009,653, issued March 3, 1994 to Snell et al. U.S. Pat. No. 5, entitled "Elastic Sanitary Napkin". 308, 346, "It can be separated during use," which was given to Bischer et al. On June 28, 1994. U.S. Pat. No. 5,324,278 entitled "Sanitary napkin having a It is shown.   Further, a sanitary napkin having a blade core structure according to the present invention was disclosed in July 1992. (Brayley). The core structure is substituted in addition to the capillary groove fiber structure). Theresa L, Johnson, etc. U.S. Patent Application No. 07, filed under the name of "Absorbent Products in Curved Shape" No./915,202 (PCT Publication No. WO93 / 01781), Thomas W. Oz United States filed under the name of Bone et al. Entitled "Absorbent Product with Elastic Center" Patent application No. 07 / 915,285, filed under the name of Robb E Olsen, etc. No. 07 / 915,201 entitled "Material Fastener Pattern" (PC T publication, WO93 / 01783) and "Section US patent application Ser. No. 07/915, entitled "Method of Manufacturing Absorbent Products of Different Shapes" Produced according to No. 134.   The sanitary napkin 20 has a pair of flaps, each of which is Extending outward along the side edges of the main body portion of the napkin. Sanitary nap of the present invention Many sanitary napkins with flaps suitable for use with kin 20 are known. Have been. Such flaps were issued to McNair on August 25, 1981 U.S. Pat. No. 4,285,343 entitled "Sanitary Napkin" "Sanitary napkins" published May 20, 2006 in Bantilberg and 1987 Sanitary napkins with flaps attached to Banchleberg on August 18, 2008 U.S. Pat. No. 4,687,478 entitled "Flaps." Some particularly preferred types are given to Osborne et al. On January 25, 1994. U.S. Pat. No. 5,281,211 entitled "Absorbent with tacked flaps" No. 09, filed on June 4, 1993 under the name of Lavash et al. 08/073, entitled "Absorbent product having flaps and regions of No. 256 (PCT application WO 93/068 on Apr. 15, 1993). 05).   The sanitary napkins described herein include one or more expandable components. Have. In one preferred embodiment, most or all of the parts are (15 It provides some extensibility (on the order of% to 40%) to the overall sanitary napkin. This The extensibility provides better fit and comfort. Properly stretchable absorbent material The fee is set forth in "Extendable Suspension" filed on July 23, 1992 under the name of Osborne et al. No. 07 / 915,133 entitled "Acquisition Products".   The term "pantiliner" is worn by women during their menstrual period An absorbent product that is smaller in bulk than a sanitary napkin. Bread with blade core structure A suitable absorbent product in the form of a tilina was launched in Osborne on April 19, 1988. No. 4,738,676 entitled "Pantiliner" issued. FIG. 2 is a form of a panty liner having a blade core structure as shown.   The term "incontinence product" refers to whether or not worn by an adult or other incontinent person. Independent of the same type of suspension, such as pads, underwear (belts, etc.) Pad held in place by the insert) Absorbent product insert, Absorbent product performance Boosters, briefs, bed pads, etc.   A suitable incontinence product having a blade core structure as described herein is disclosed in 1981 U.S. Patent No. 4,253,461, issued to Strickland on March 3; U.S. Patent Nos. 4,597,760 and 4,597,761 to L. U.S. Pat. No. 4,909,802 to U.S. Pat. U.S. Pat. No. 4,909,802, granted to Gibson et al. On October 23, 1990 U.S. Patent No. 4,964,860; U.S. Patent No. 5,300 to Faith et al. No. 5,304,161 to Noel et al. I have.   The term "diaper" is used by infants and incontinents fixed around the wearer's waist. Refers to the absorbent product worn. A suitable female having the blade core structure of the present invention One is U.S. Pat. No. 3,860,00, issued to Buell on January 14, 1975. No. 3 and US Pat. No. 5,151, issued Sep. 29, 1992 to Buell et al. No. 092.   All patents, patent applications (and issued and foreign patents) and The publications mentioned through this patent application are incorporated herein. However, Documents incorporated herein by reference are not admitted to be indicative of the present invention. No. Also, it should be noted that any of the materials and products commercially available here indicate the present invention. It is not allowed.   While particular embodiments of the present invention have been illustrated and described, departures from the spirit and scope of the invention. Obviously, various changes and modifications may be made without departing from the scope of the invention. Therefore, within the scope of the present invention It is intended to cover such changes and modifications.

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Claims (1)

[Claims]   1. Longitudinal centerline, two longitudinal side edges, and two transverse edges A disposable absorbent product comprising: a liquid permeable topsheet; and the top. A liquid-impermeable backsheet connected to the topsheet, the topsheet and the A disposable absorbent product having an absorbent core disposed between the absorbent sheet and the backing sheet. A blade core structure disposed between the top sheet and the back sheet. And the blade core structure has a strand having a plurality of non-absorbable fibers, It has a pair of ends, and the end of the blade core structure is in contact with the absorbent core. A disposable absorbent product characterized by the following.   2. The disposable absorbent material according to claim 1, wherein the blade core structure is hydrophilic. Product.   3. The disposable absorbent material according to claim 1, wherein the blade structure is hydrophobic. Goods.   4. The fiber having the strand of the braid structure has a hydrophilic material The disposable absorbent product according to claim 1.   5. Fiber having the strand of the blade structure has a hydrophilic material A disposable absorbent product according to claim 1.   6. The disposable absorbent product according to claim 5, wherein the fibers have a hydrophilic surface.   7. The use according to claim 1, wherein the fibers having the strands are woven. Discarded absorbent products.   8. The fiber of claim 1, wherein the fibers having the strands comprise passage fibers. Disposable absorbent products.   9. The blade core structure is disposed between the top sheet and the absorbent core The disposable absorbent product according to claim 1, wherein the absorbent article is prepared.   10. The blade core structure is at least partially disposed within the absorbent core. The disposable absorbent product according to claim 1.