KR20040052167A - Disposable Absorbents Containing Multi-layer Absorbent Core - Google Patents

Abstract

PURPOSE: A disposable absorbent article having a laminated absorbent core is provided to have a good absorption and retention ability of a body secretion and to prevent an aggregation. CONSTITUTION: The disposable absorbent article comprises a liquid permeable top sheet(6); a liquid impermeable back sheet(4); an absorbent core inserted and fixed between the top sheet and the back sheet; and a bonding part. The absorbent core is an absorbent sheet composed of an absorbent material consisting of a fluff pulp(11), a super absorbent polymer(12) and a synthetic fiber(13), and a tissue(9) as a sheath of the absorbent material. The disposable absorbent article is a laminate formed by laminating the absorbent sheets.

Description

Disposable Absorbents Containing Multi-layer Absorbent Core}

The present invention relates to a disposable absorbent article having a superior absorbency and retention compared to conventional absorbent articles. More specifically, the disposable absorbent article of the present invention is intended to provide a disposable absorbent article having superior absorbency and holding power than a conventional absorbent article by manufacturing an absorbent material constituting the absorber to be ultra-thin than conventionally and forming it in a multilayer structure. .

The most preferred embodiment of the disposable absorbent article in the present invention is a disposable diaper.

Disposable diapers typically have a liquid permeable top sheet that is in direct contact with the wearer's skin when worn, a liquid impermeable back sheet that forms an outer surface when worn, and between the top sheet and the back sheet. It comprises an absorbent core disposed, a leg flap having an elastic body, and a fastening means as basic components. Diapers including these basic components can be formed in various combinations of diapers of various types, but the configuration proposed in US Patent No. 3,860,003, filed Jan. 14, 1975, is widely cited as the preferred form of disposable diapers. The diaper comprising the basic component is a diaper in that a leg flap with an elastic body provides a fluid impermeable barrier between clothes in contact with the edge of the diaper and provides a gasketing action near the wearer's leg. Although effective in preventing the discharge of sieve discharged into the clothes in contact with the edges of the diaper, only one leg flap with an elastic body completely prevents the diarrhea discharge from leaking between the leg flaps, such as during severe diarrhea. It was not enough to prevent. This problem has been solved by further constructing a shield having another elastic body inside the leg elastic body. Various embodiments of such blockers have been proposed in various combinations. For example, Korean Patent Publication No. 1993-0000085 proposes a form configured inside the leg elastic body under the name of "flap" provided with an elastic member, and Publication No. 1994-0008959 refers to "blocking cuff". As a name, a form composed between a leg elastic body and an absorbent core has been proposed, and the publication No. 1019950008172 proposes a form composed of a double solidification band having the same height under the name of the "curing band".

The coagulation band is usually formed adjacent to the absorber of a disposable diaper and is configured as a liquid permeable or liquid impermeable hydrophobic material to prevent body fluids before being absorbed into the absorber or leakage of feces that cannot be absorbed.

Among the above components of these disposable diapers, the upper sheet is generally composed of soft to the touch and not irritating the wearer's skin. In particular, the upper sheet should be such that the liquid body secretion can pass quickly into the absorbent body. The back sheet is impermeable to liquid so that the body secretions absorbed and absorbed by the absorber do not contaminate or wet products that are in direct contact with the diaper, such as the wearer's clothing or bed sheet. The back sheet is preferably impermeable to liquids and permeable to gases. As a film having such physical properties, a plastic film has been generally used, and in recent years, a material obtained by adhering a nonwoven fabric to a polyethylene film has been widely used.

The leg flaps with elastomers consist of side flaps and flap elastomers (leg elastics), as specifically described in U.S. Patent No. 3,860,003. The leg elastics are located adjacent each longitudinal edge to allow the diaper D to be worn and secured to the wearer's leg.

The fastening means performs a function of wearing a disposable diaper on the body to maintain its wearing state. Fastening means are widely used fastening members such as adhesive tape tabs or hooks and loops well known in the diaper field.

Each of the components constituting the diaper are mutually bonded and adhesively fixed by hot melt adhesive, heat fusion or other bonding method which is well known in the diaper field.

Disposable diaper products, including adult diapers such as infants and incontinents, can be adjusted so that the basic performance in terms of the amount of absorption that absorbs and stores the body fluids excreted by physiological action is not discomfort for the user. .

In disposable diapers the absorbent is the means by which liquid body secretions can be absorbed and retained. Absorbents are typically composed of fluff pulp and super absorbent polymers as liquid absorbents, and tissues that are packaged to maintain them in a shape or shape. It absorbs body fluids through the top sheet at a high speed and retains body fluids to prevent the absorbed body fluids from contacting the skin again. The size, shape (eg, rectangular, hourglass, etc.), structure, and absorbent capacity of the absorbent body are adapted to suit the wearer from infant to adult. The absorbent body is attached and fixed on the back sheet by a known attachment means such as an adhesive.

Generally, the superabsorbent resins can absorb large amounts of liquids such as water, body fluids (eg, urine, blood and menstrual blood), and can also retain these absorbed liquids under moderate pressure. It is well known that such superabsorbent resins are very usefully used in absorbent products such as disposable diapers, adult incontinence pads and briefs, and physiological products.

The development of superabsorbent polymers for use in disposable absorbent products such as diapers is of substantial commercial interest. Very desirable properties for such absorbent articles are also light and thin in weight and thickness. Lighter, thinner diapers, for example, are smaller in volume, lighter in activity, fit better under clothing, and have less visible signs. These products can also pack large quantities in a small volume and are easier to handle when consumers purchase and transport diapers. In addition, packing large quantities in a small volume also reduces dispensing costs for manufacturers and distributors, and reduces storage costs due to the reduced storage space required for the store per diaper unit. The ability to develop diapers is measured by the ability to develop relatively light and thin absorbents or absorbent structures capable of capturing and storing large quantities of secreted body fluids, especially urine fluids. The absorber of a conventional absorbent product is composed of a fluffy pulp, which absorbs and diffuses a large amount of liquid and maintains the shape of the absorber, and a super absorbent resin, which absorbs and stores a large amount of the introduced liquid. Such a conventional absorbent is usually relatively heavy and thick because the super absorbent polymer is less than 50% by weight, and the fluffy pulp is composed of 50% by weight or more. Conventional absorbers suffer unfortunately when trying to provide light and thin absorbents containing at least 50% by weight of superabsorbent polymers. That is, the conventional absorbent article is free of the superabsorbent resin and moves freely to a limited extent during the manufacturing process and / or use (wear). Movement of the superabsorbent resin during manufacture can cause handling loss of the superabsorbent resin during the manufacturing process and the particles used are not evenly distributed. In particular, a more important problem arises when these superabsorbent resins of the absorber during use (wear) absorb and absorb swelling amounts of liquid introduced and move during or after swelling. Unable to fix the particles in the optimal position results in insufficient storage capacity in one area and overcapacity in the other, which causes consumers to complain of agglomeration of absorbent products. Due to this problem, there is no choice but to manufacture the fluffy pulp, which serves to maintain the shape of the absorbent by fixing the superabsorbent polymer in a limited manner, and thus, the disposable diapers produced are relatively heavy and thick. It was a situation.

According to Korean Patent Publication No. 86-004605, which attempts to improve such a conventional problem, the concentration of 30 to 50% of the absorbent is concentrated on the front part of the diaper to improve the absorbency while reducing the use of raw materials. It was not possible to improve technically or satisfactorily.

In addition, according to Korean Patent Publication No. 86-00874, while the structure of the absorber is a double layer, the absorbent of higher density is distributed to the absorber of the lower layer than the absorber of the upper layer to improve the absorbing power, but this is also the agglomeration or absorbing power of the absorber. It was not enough to improve it.

Accordingly, the present inventors have conducted research to prepare ultra-absorbent polymers containing 50% by weight or more of superabsorbent polymers without deformation of the absorbent body or form, and as a result, the fluffy pulp constituting the conventional absorbent body and high absorbency By mixing synthetic resin with a low melting point and melting the mixture at high temperature to bind with the downy pulp, the superabsorbent polymer can be applied at least 50% by weight, and the shape of the absorbent can be prevented. It has been found that the application of superabsorbent polymer by weight or more is excellent in absorbing and retaining body secretions, and the use of less pulp can produce an ultra thin absorbent product with a significantly thinner thickness. The present invention was found to be able to have a more excellent absorbency by configuring a multi-layer structure Came to complete.

An object of the present invention is to configure the absorbent of the disposable absorbent product with a fluffy pulp, superabsorbent resin and synthetic fiber yarn, but by making it ultra-thin and composed of a laminate, the absorption and retention performance of the body secretion is excellent and can prevent aggregation To provide a disposable absorbent product.

The above object of the present invention is a disposable diaper comprising a liquid permeable upper sheet, a liquid impermeable back sheet, an absorbent and a fastening means inserted into and fixed between the upper sheet and the back sheet, wherein the absorbent is made of downy pulp, superabsorbent resin and synthetic. It is composed of a fiber yarn, but it can be achieved by manufacturing an ultra-thin and forming a multilayer structure.

1 is a plan view illustrating one embodiment of a disposable absorbent article according to the present invention.

2 is a partial cross-sectional view taken along the line A-A of FIG.

3 is an enlarged cross-sectional view of an absorber according to the present invention;

4 is an enlarged cross-sectional view of a part of an absorber of a multilayer structure according to the present invention;

<Description of Symbols for Major Parts of Drawings>

1: front waist 2: crotch

3: rear waist portion 4: back seat

5: absorber 6: liquid permeable top sheet

7 inner solidification band 8 second nonwoven fabric

9: tissue 10: waistband

11: fluffy pulp 12: super absorbent polymer

13: synthetic fiber 14: coagulated band end portion

15: front fastening means 16: rear fastening means

17. Coagulation band elastic body 18: Inner coagulation band flap adhesion part

19: fastening portion of the fastening means 20: coagulation band end adhesive portion

21: inner flap band flap 22: side flap

23: inner side flap 24: outer side flap

25: curd band side flap 26: outer curd band

27: outer side band band flap 28: outer side band band flap

In the present invention, a disposable type diaper for infants and incontinence is described as an embodiment, in particular as a disposable absorbent product.

The present invention provides a disposable diaper including a liquid permeable upper sheet, a liquid impermeable back sheet, an absorbent body and a fastening means inserted into and fixed between the upper sheet and the back sheet, wherein the absorbent body comprises a fluffy pulp, a super absorbent resin, and a synthetic fiber yarn. There is provided a disposable diaper characterized by laminating an ultra-thin sheet.

Hereinafter, with reference to the accompanying drawings will be described in detail.

1 is a plan view showing when the panty-type disposable diaper which is one embodiment of the present invention is unfolded, and is a disposable diaper to which the absorber according to the present invention is applied. Disposable diaper (D) has an hourglass-like appearance divided into the front waist (1), crotch (2) and the back waist (3). The appearance of the disposable diaper does not necessarily have to be symmetrical in left and right and front and rear, but preferably has a symmetrical structure.

Referring to FIG. 2, FIG. 2 is a partial cross-sectional view showing a cross-sectional structure taken along the line AA in the crotch portion of FIG. 1, wherein an absorbent body 5 is disposed between the liquid impermeable backsheet 4 and the liquid permeable top sheet 6. A configuration is shown in which the inner and outer curd bands 7 and 26 are inserted and fixed and formed on the side flap 22.

The absorbent body 5 is packaged by the tissue 9 and bonded and fixed to the back sheet 4 by means of attachment such as a known hot melt adhesive. A second nonwoven layer 8 is formed on the tissue 9 layer. The second nonwoven layer 8 performs a function of maintaining a quick absorbing force during urination together with a cushion function on the skin. The liquid permeable topsheet 6 and the liquid permeable second nonwoven fabric 8 diffuse urine fluid, block the transfer of urine fluid absorbed by the absorber 5 to the liquid permeable topsheet 6, and the absorbent body 5. Function to protect. The liquid permeable second nonwoven fabric 8 may be formed on top of the liquid permeable topsheet 6, which may be omitted.

In the present invention, the absorbent body 5 includes a sheet of absorbent material composed of a fluffy pulp 11, a super absorbent polymer 12, and a synthetic fiber yarn 13, and a tissue constituting the skin thereof. It consists of (Tissue). The absorption and retention performance of the absorbent body 5 can be adjusted according to the composition of the downy pulp 11, the superabsorbent resin 12 and the synthetic fiber yarn 13, and the stacking method of the absorbent material sheet. The sheet of absorbent material consisting of the fluffy pulp (11), superabsorbent polymer (12) and synthetic fiber yarn (13) according to the present invention is an ultra-thin type of 1/3 to 1/4 in thickness and weight compared to the conventional one It is manufactured in the form of a sheet of. The sheet of absorbent material of the present invention is composed of a fluffy pulp (11), a superabsorbent resin (12) and a synthetic fiber yarn (13), which is composed of only conventional fluffy pulp and superabsorbent resin, the composition ratio is also 50% by weight of conventional The composition ratio which was composed of the above-mentioned fluffy pulp and less than 50% by weight of the super absorbent polymer is drastically reduced the amount of the fluffy pulp, and the superabsorbent polymer is formed at 50% by weight or more. In addition, the conventional pulp pulp and superabsorbent resin is simply mixed and dispersed evenly, but the absorbent of the present invention is uniformly mixed by mixing the low-melting synthetic fiber yarn in the pulp pulp and superabsorbent resin, and then heated to around 150 degrees Celsius By melting the synthetic fiber yarns to bind the respective components to inhibit the free movement of the superabsorbent polymer (particles), thereby producing an absorbent material sheet without agglomeration during the diaper manufacturing process or diaper use, which is a subsequent process do.

The ultra-thin sheet of absorbent material prepared in the form of a sheet is cut into a predetermined size and packaged by a tissue which is an outer shell to produce one absorbent sheet (see FIG. 3).

A preferred absorbent of the present invention is an absorbent which is a laminate of a multilayer structure in which two or more absorbent sheets packed with the tissue are laminated. In the present invention, the stacked structure of the absorbent body 5 is a sheet-like structure in which the absorbent sheet packed with tissue is stacked or the absorbent sheet-shaped absorbent sheet wrapped with tissue is shown in FIG. It may be a folded structure formed in the shape of a child. The shape of the absorbent body 5, which is the laminate of the present invention, is known and can be formed in other shapes other than T-shaped, hourglass and straight.

The fluffy pulp 11 constituting the absorbent body 5 in the present invention is made by pulverizing a fibrous web or sheet-like wood pulp well known in the art, and may include 9 to 50% by weight of the absorbent weight. , Preferably 15 to 45% by weight.

The superabsorbent resin 12 constituting the absorbent body 5 in the present invention may be in the form of particles or in the form of fibers, which are well known in the art, for example, acrylate polymer crosslinked product, vinyl alcohol-acrylate copolymer Copolymer crosslinked product, maleic anhydride graft polyvinyl alcohol crosslinked product, acrylate-methacrylate copolymer crosslinked product, crosslinked product of saponified methylacrylate-vinyl acetate copolymer, starch-acrylate graft copolymer crosslinked product , A crosslinked product of a saponified product of a starch-acrylonitrile graft copolymer, a carboxymethylcellulose crosslinked product, an isobutylene-maleic anhydride copolymer crosslinked product, and a methylene oxide polymer crosslinked product. These may be used alone or in combination. It is preferable that it is 5-1,000 micrometers, and, as for the average particle diameter of these polymer particles, it is more preferable that it is 100-600 micrometers. In addition, these super absorbent polymers may include 50 to 90 wt% of the weight of the absorbent, preferably 50 to 80 wt%.

In the present invention, the synthetic fiber 13 constituting the absorber 5 may include 1 to 40% by weight of the absorber weight, and may preferably include 5 to 30% by weight. Synthetic fibers 13 that can be used in the present invention include polyethylene fibers, polypropylene fibers, polyester fibers, polyamide fibers, rayon fibers, polyurethane fibers, or two component fibers thereof. These constituent fibers include split bicomponent fibers in the form of Side-by-Side, cardiac bicomponent fibers in the form of Sheath and Core, and bicomponent fibers in the islands in the sea. Fibers and the like can be used, and as the crimped synthetic fibers, bicomponent fibers of the side by side type or the sheath and core type are preferable. It is preferable that these fibers have the fineness of 1-20 denier. In addition, synthetic fibers may be applied to long fibers, but short fibers having a length of 0.1 to 100 mm are preferred, and more preferably 0.5 to 10 mm having a fiber length similar to fluffy pulp.

3 is an example for explaining the component composition structure of a partially enlarged view of the absorber 5. The particle | grains in the figure are superabsorbent resins 12, and the synthetic fiber 13, the synthetic fiber 13, the synthetic fiber 13, and the fluffy pulp 11 by the surface of the synthetic fiber 13 melt | dissolved by high temperature heat. As shown in the figure forms a network serves to control the movement of the super absorbent polymer. The absorbent constitution in the present invention may be different depending on the object of use of the product and its size and type of use, and may be variously applied depending on the materials. Specifically, the superabsorbent polymer, the synthetic fiber, and the fluffy pulp may be evenly mixed to obtain the same density and composition ratio of the entire absorbent as in a conventional absorbent. If necessary, the liquid absorbed in the upper layer located on the liquid permeable upper sheet may be To prevent the phenomenon of backflow by pressure, it forms a layer made of synthetic fiber, and the synthetic fiber and fluffy pulp and absorbing power is weakly below, but it has strong gel strength when absorbed, so it can quickly transfer the absorbed liquid to the lower part. It is also possible to evenly distribute the synthetic fiber, downy pulp and superabsorbent polymer having excellent water retention in the lower layer. The structure of the absorber enables easy application in the process and can realize a shape-retaining and ultra-thin absorber while using a small amount of synthetic fibers and fluffy pulp.

The diaper of the preferred embodiment of the present invention is provided with an inner side coagulation band 7 and an outer side coagulation band 26 as leakage preventing means on the left and right sides of the absorbent body 5. The inner coagulation band 7 and the outer coagulation band 26 form a pocket that traps the body fluid which is separated from the absorbent body 5. In addition, the outer sensation band 26 forms a function of tightening the thigh portion of the wearer's leg and a pocket for confinement of the body fluid separated from the inner sensation band (7). On the other hand, the leg elastic body having a function of tightening the leg thigh portion of the wearer may be applied to the position of the outer side band 26 in place of the outer side band 26.

The inner coagulation band 7 and the outer coagulation band 26 are formed between the absorber 5 and the disposable edge D side edges. The inner curable band 7 is formed adjacent to the absorber 5, and the outer curable band 26 is formed adjacent to the side edge of the disposable diaper D. Alternatively, the inner curable band 7 is formed on the absorbent body 5, and the outer curable band 26 is formed on the outer curable band 26 between the inner curable band 7 and the disposable diaper D side edge outside the absorber 5. ) May be formed. In addition, the inner corresponding band 7 and the outer corresponding band 26 may be formed of an adhesive flap 25 connected as one, or may be formed of separate materials.

The inner coagulation band 7 and the outer coagulation band 26 may include a coagulation band flap attachment portion 18, a coagulation band end portion 14, a coagulation band end attachment portion 20, a coagulation band elastic body 17, and a coagulation band flap 21. 28) and the corresponding band side flaps 25, but the internal and external corresponding band configuration requirements may be formed as necessary.

The inner and outer side band flaps 21 and 28 have an absorbent pocket outside the absorber 5 by at least a portion of the crotch section 2 at the portion other than the end band attaching section 20 by the band band elastic body 17. To form. The inner and outer solidifying bands 7 and 26 may be hydrophobic nonwoven fabrics or waterproof nonwoven films, and in the case of hydrophobic nonwoven fabrics, the solidifying band flaps 21 are formed in two layers to enhance the hydrophobic effect. An adhesive may be bonded between the coagulation band flaps 21.

In addition, the rotatable band 7 forms one or more elastic bodies on the rotatable band flap 21 between the rotatable band flap adhesion portion 18 and the rotatable band end portion 14 so that the rotatable band end portion 14 closely adheres to the baby skin. And, the elastic modulus of the elastic band elastic body 17 may be formed of 100 ~ 300%, preferably 180 ~ 200%. In addition, the elastic modulus of the coagulation band elastic body 17 may be formed to have an inclination by increasing the elastic modulus of the elastic body closer to the coagulation band end portion 14 or closer to the coagulation band adhesion portion 18. The elastic band elastic body 17 is mainly used for the elastic yarn, the elastic yarn uses a polyurethane spandex (Polyurethane Spandex) or natural rubber.

The rotatable band end portion 14 is a portion where the rotatable band flap 21 is in contact with the baby skin, and the rotatable band flap adhesion portion 18 has the rotatable band flap 21 having a side flap outside the disposable diaper (D) absorbent body 5. It is a part bonded to the longitudinal direction of the disposable diaper D to (22).

The side flap 22 on the outside of the coagulation band 7 is a flexible sheet in which a nonwoven fabric layer and a liquid impermeable back sheet 4 are adhered to the liquid impermeable back sheet 4 on the outer side of the absorber 5. It is composed. Alternatively, the liquid impermeable backsheet 4 may be formed only, or the liquid impermeable backsheet 4 and the coagulation band side flap 25 may be formed.

The rotting band side flap 25 refers to an outwardly extending flap including the rotting band flap attachment portion 18. In at least the crotch portion 2 of the disposable diaper D, the side flap 22 has an inner side flap 23 and an outer side flap along which the flap adhesive portion 18 of the corresponding band is along the longitudinal bonding point of the disposable diaper D. Separated by 24, the width of the outer side flap 24 is limited to 20 ~ 50mm, preferably set to 15 ~ 35mm. If the width of the side flap 22 outside the absorber 5 is formed to be less than 10 mm and 50 mm or more, it is not preferable because it inhibits the appearance image of the disposable diaper D.

The coagulation band end adhesive portion 20 is a longitudinal direction of the disposable diaper D such that the coagulation band flap 21 forms an absorbent pocket outside the absorber 5 by the coagulation band flap adhesion portion 18 and the coagulation band elastic body 17. Refers to an adhesive portion for fixing the coagulation band flap 21 at the inside and the outside of the coagulation band flap adhesion portion 18 at both end edge waist portions 1 and 3. The inner curable band end adhesive portion 20 is formed to be partially fixed on the absorber 5, and preferably formed so that a non-bonded portion does not occur in the side flap 22 portion outside the absorber. The length of the coagulation band end adhesive portion 20 is formed to be typically 50 to 100 mm in the waist portions 1 and 3 of the disposable diaper (D). The terminal adhesive portion of the outer side coagulation band 26 may be maintained in an unbonded state.

Disposable diaper (D) of the present invention has a fastening means to be worn on the wearer's body so that the wearing state can be maintained as it is.

The fastening means of the present invention is a fastening means of the re-adhesive fastening means consisting of a fixed end 19 of the re-adhesive fastening means fixed to the edge of the side flap 22 of the waist of the disposable diaper back side as a known fastening means. And a front fastening means 15 formed in the transverse direction of the front waist portion 1 and providing a target region to which the refastening fastening means 16 can be bonded. Here, the re-adhesive fastening means 16 may be a hook or a loop, which is a pressure-sensitive adhesive tape coated with a conventionally known adhesive or a mechanical re-adhesive means, and provides a target area. The fastening means 15 may be a hook or a loop that can be engaged with a hook or a loop, which is a film to which the adhesive tape can be attached or a mechanical re-adhesive means. Such fastening means is a technique known in the field of disposable diapers.

Disposable diaper (D) of the present invention may be provided with a waistband (10). The waist band 10 is formed by bonding an elastic body to the waist portions 1 and 3 of the disposable diaper D. Waistband elastomer is mainly used polyurethane foam (Polyurethane Foam), polyurethane film (Polyurethane Film), polyurethane nonwoven elastomer and elastic yarn, the elastic yarn is used polyurethane Spandex (polyurethane Spandex) or natural rubber. The waist elastic of the waistband 10 may be formed over the entire product width in the transverse direction between the longitudinal end of the disposable diaper D and the outer side of the absorbent body 5, or may be partially shortened.

Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples of disposable diapers among absorbent products, but the scope of the present invention is not limited. In the present invention, the physical properties of the super absorbent polymer and the absorbent product were measured and evaluated by the following method.

<Evaluation of water retention of physiological saline of super absorbent polymer>

The water-repellency evaluation of the super absorbent polymer used in the present invention was measured by putting 1 g of an absorbent raw material such as superabsorbent polymer or down pulp to be tested into a tea bag. Subsequently, the tea bag was immersed in a tank containing physiological saline, and then sufficiently absorbed for 10 minutes, and then left on a wire net for 5 minutes to let out unabsorbed physiological saline, followed by 5 minutes in a centrifuge (commercial rotary dehydrator, 1,400 rpm). It was centrifuged. Subsequently, the amount of physiological saline repaired to the superabsorbent polymer in the tea bag was measured to calculate the water retention capacity, and the results are shown in Table 1.

<Evaluation of permeation time for physiological saline of absorbent product>

The permeation time of the absorbent product of the present invention was evaluated by putting 40 ml of physiological saline into the disposable diaper to be tested, and measuring the time (seconds) at which the physiological saline was absorbed into the absorber on the surface. After about 30 minutes to measure and evaluate in the same manner as described above and the results are shown in Table 2. At this time, it is regarded that the lower the measured value once and twice, the better the absorption rate for physiological saline.

<Evaluation of surface dryness of physiological saline of absorbent products (Wet-Back: Determination of the amount to be cut out again)>

Surface dryness evaluation of the absorbent product of the present invention is absorbed by adding 150 ml of physiological saline to the disposable diaper to be tested, and after leaving the product for 10 minutes at room temperature, five sheets of filter paper are placed on the physiological saline input part of the product. After putting it up to 3.6 kg / 100 cm 2 for 2 minutes, the amount deposited on the filter paper was measured and evaluated. The results are shown in Table 2. At this time, it is considered that the lower the measured value, the better the surface dryness.

<Evaluation of water retention performance for physiological saline of absorbent product>

Evaluation of water retention performance of the absorbent product of the present invention is to immerse the disposable diaper to be immersed in a tank containing physiological saline for 10 minutes, and then allowed to stand on a wire mesh for 5 minutes to drain the unabsorbed physiological saline, then centrifuge Centrifuge was performed for 5 minutes in a commercially available rotary dehydrator (1,400 rpm). Thereafter, the amount of physiological saline repaired in the disposable diaper was measured to calculate the water retention performance value.

Example 1

95 g of super absorbent polymer (Songwon Industries, HS-300V) 47 g of downy pulp (JLDE Grade, Rayonier, USA) with 2 deniers, 5 mm in length, outer periphery of polyethylene resin, and 7 g of sheath-and-core bicomponent fiber in the form of a sheath and core composed of polypropylene resin After mixing and dispersing, it was heated at 150 ° C. to melt the outer periphery of this component fiber, thereby obtaining 1 m 2 of ultra-thin absorbent material in which fluffy pulp and / or the component fiber were bound.

The absorbent material prepared as described above is cut into 10 centimeters by 40 centimeters in length and processed into a tissue having a basis weight of 16 g / m 2, which is made into a three-layer laminate as shown in FIG. 4A, and the absorber is a liquid. Disposable diapers according to the present invention, which are arranged between the permeable topsheet 6 and the liquid impermeable backsheet 4, were produced. Table 2 shows the results of evaluation of the physical properties of the disposable diapers thus obtained.

Example 2

Super absorbent resin (Songwon Industry, HS-300V) 53g 35 g of fluffy pulp (JLDE Grade, Rayonier, USA) with 6 deniers, 38 mm in length, outer periphery of polyethylene resin, and 5 g of sheath-and-core type bicomponent fiber composed of polyethylene terephthalate After mixing and dispersing, the outer periphery of the component fiber was melted by heating at 140 ° C. to obtain 1 m 2 of absorbent material in which fluffy pulp and / or the component fiber were bound.

The absorber prepared as described above was cut into a size of 10 centimeters by 40 centimeters in width and wrapped in a tissue having a basis weight of 16 g / m 2 to make an absorber, which is a laminate having a four-layer structure as shown in FIG. A disposable diaper according to the present invention, which is arranged between the topsheet 6 and the liquid impermeable backsheet 4, was produced. Table 2 shows the results of evaluation of the physical properties of the disposable diapers thus obtained.

Example 3

A disposable diaper was constructed in which the absorbent material prepared in Example 1 was folded to have a curved structure in the longitudinal direction as shown in FIG. Table 2 shows the results of evaluation of the physical properties of the disposable diapers thus obtained.

Comparative Example 1

213 g of superabsorbent polymer (Songwon Industries, HS-300V) and 270 g of downy pulp were mixed and dispersed to obtain 1 m 2 of absorbent material. The absorbent material prepared as described above is cut into a size of 10 centimeters by 40 centimeters in width and wrapped with a tissue having a basis weight of 16 g / m 2 to make an absorbent body, and the absorbent body is disposed between the top sheet 6 and the back sheet 4. A disposable diaper was produced. Table 2 shows the results of evaluation of the physical properties of the disposable diapers thus obtained.

division Absorbent Raw Material HS-300V Downy pulp Water retention capacity (g / g) 34 2

Product Evaluation Method Penetration time Surface dryness Conservative 1 time Episode 2 unit Seconds / 40 ml Sec / 80 ml g / 150 ml g / piece Example 1 28 29 0.3 320 Example 2 27 28 0.3 320 Example 3 26 28 0.3 320 Comparative Example 1 38 45 0.5 270

As can be clearly seen in Tables 1 and 2, in the case of an absorbent article in which a structure is formed by applying the absorber having a multi-layer structure according to the present invention (Examples 1 to 3), the products of the conventional conventional (Comparative Example 1) It was confirmed that more excellent permeation time and surface dryness and more excellent water-retaining properties. As a result, the absorbent product to which the absorbent body having the multilayer structure of the present invention is applied absorbs and stores body fluids quickly and discharges the stored body fluids back to the human body even if they are pressed by the human body and external pressure in the stored state. ) Can effectively prevent the phenomenon. In addition, the absorbent product of the present invention is thin and light due to the drastic reduction of the amount of fluffy pulp, which is easy to carry and has an excellent wearing comfort. This multi-layered structure in the present invention can be applied in a variety of shapes as shown in Figure 4 in addition to the effect of having a variety of characteristics by varying the number of different layers, various folded shape structure and various composition structure ratio and raw material component types for each layer There is.

Claims (5)

Disposable absorbent article comprising a liquid permeable top sheet 6, a liquid impermeable back sheet 4, an absorbent body 5 and a fastening means inserted and fixed between the top sheet 6 and the back sheet 4. The absorbent body (5) is an absorbent sheet comprising an absorbent material made of downy pulp (11), a superabsorbent polymer (12), and a synthetic fiber yarn (13) and a tissue (9) which is an outer skin, and the absorbent sheets are laminated. Disposable absorbent product, characterized in that the formed laminate. The disposable absorbent article according to claim 1, wherein said absorbent body is a double to quadruple laminate. A disposable absorbent article according to claim 1, characterized in that the absorbent body (5) is a laminate folded in double to quadruple. The disposable absorbent article according to claim 1, wherein the synthetic fibers constituting the absorbent body (5) are a single component selected from polyethylene, polypropylene, polyester, polyamide, rayon, polyurethane, or in the form of two component fibers. The synthetic fibers constituting the absorber 5 have a fiber thickness of 1 to 10 denier and a fiber length of 0.1 to 10 mm. Disposable absorbent products.