KR100443864B1 - Disposable diaper comprising absorbing-dispersing layer - Google Patents

Abstract

The present invention relates to a disposable absorbent product including a low basis weight absorption diffusion layer in the lower portion of the upper sheet so that the absorption rate is improved. The liquid permeable top sheet 6, the liquid impermeable back sheet 4, and the top sheet Disposable absorbent product comprising an absorbent body (5) located between the (6) and the back sheet (4), a coagulation band (7) for preventing the occurrence of leakage, and fastening means for fixing the absorbent product to the wearer's body It is characterized in that the lower permeable liquid permeable absorption diffusion layer 8 is further mounted below the liquid permeable top sheet 6.

Therefore, even when the side lying down or the like can greatly reduce the occurrence of the phenomenon, there is an effect of providing a disposable absorbent product having a high effect of suppressing the occurrence of leakage.

Description

Disposable diaper containing absorbing-dispersing layer

The present invention relates to a disposable absorbent article having an absorbent diffusion layer. More particularly, the present invention relates to a disposable absorbent product in which a low basis weight absorption diffusion layer is included in the lower portion of the upper sheet so that the absorption rate is improved.

A general disposable absorbent product is a product that absorbs body fluids excreted by various physiological actions, namely, urine, feces, menstrual discharge and vaginal discharge, and more specifically, disposable diapers used by infants or incontinence. Women's sanitary napkins and panty liners.

The present invention is preferably applied to disposable diapers in disposable absorbent articles.

The configuration of the disposable diaper, as shown in Figure 1, a liquid-permeable top sheet (6) in direct contact with the wearer's skin when worn, and a liquid-impermeable backsheet (4) forming an outer surface when worn (back sheet), the absorbent (5) (absorbent core) and the fastening means and the like positioned between the top sheet 6 and the back sheet (4).

Among the components of these disposable diapers, a liquid permeable top sheet 6 is a synthetic nonwoven fabric or a film with holes formed so that body fluid can quickly pass through the absorbent body 5. As the synthetic nonwoven fabric, a hydrophilic treatment is usually used for hydrophobic fibers in order to quickly transfer the body fluid to the absorbent body 5.

The absorber 5 is typically made of a fluffy pulp (11) (fluff pulp), a super absorbent polymer 12 (super absorbent polymer) and tissue (9) (tissue) for packaging them, such as liquid permeable It has a function of retaining the absorbed body fluid to absorb the body fluid passing through the top sheet 6 at a high speed and to prevent the absorbed body fluid from contacting the skin again.

The liquid-impermeable back sheet 4 has a function of preventing the body fluid absorbed by the disposable diaper from leaking under the absorber 5 to contaminate the wearer's clothing or the surrounding environment, and the back sheet 4 As the furnace, polyethylene film is mainly used, and in order to improve the softness of the material, a polyethylene film bonded with a nonwoven fabric may be used.

And it includes a fastening means consisting of a re-fastening means 15 and the front fastening means 14 for fixing the disposable diaper formed by the above components to the wearer's body to maintain the wearing state.

In addition, the components are adhered to and fixed to each other by hot melt adhesive, heat fusion or other known bonding method.

The technical level of disposable diapers was developed with the focus on adjusting the basic performance in terms of the amount of absorption and retention of body fluid discharged by physiological action so that the user can use it without inconvenience. In recent years, it is considered that the technological development is progressing in the direction of improving the wearing comfort in meeting the basic performance, and as one method for this, ultra-thin disposable diapers for making the absorber 5 thinner have been developed.

One simple method for producing ultra-thin disposable diapers is to use less amount of downy pulp 11, which takes up a lot of volume in the absorbent body 5, and to increase the amount of the superabsorbent resin 12 used. In such ultra-thin disposable diapers, the high proportion of the superabsorbent resin 12 in the mixed content of the downy pulp 11 and the superabsorbent resin 12 weakens the strength of the absorber 5, and the absorber is absorbed by the action or movement of the wearer. The width of (5) decreases, distorted deformation occurs, and causes deformation such as agglomeration and cracking. In addition, the phenomenon that the initial wearing state of the disposable diaper is not continuously maintained by the wearer's movement, and may be drooped below the original wearing position. The absorbent body 5 thus deformed has a reduced absorption area, so that the absorption function is insufficient, and the possibility of leakage occurs.

As a means for preventing such leakage, a banding band 7 and a foot elastic body 25 are formed outside the side of the absorber 5. The coagulation band 7 forms a pocket for confining excrement leaving the absorbent body 5, and the leg elastic body 25 is a function of preventing the leakage of excretion by bringing a disposable diaper in close contact with the thigh of the wearer when worn. Do it. However, deformation, sagging and dripping of the absorbent body 5 of the disposable diaper causes a decrease in the adhesion of the solidifying band 7 and the leg elastic body 25 to the wearer. In addition, the liquid permeable top sheet 6 is hydrophilic, but the hydrophilic surface is changed to hydrophobic by repeated urination, and the thickness of the nonwoven fabric is low so that the delivery to the absorbent 5 during urination is delayed and the excreted urine is absorbed ( 5) There is a problem that the leakage occurs due to gaps in the legs and the like, which are gathered into the coagulation band 7 as the leakage preventing means on the side, and the adhesion of the diaper to the body of the wearer is reduced. In particular, when urination or the like is made in a side lying position, there is a problem in that the probability of glands is increased.

Therefore, there is a need for a new absorption system that can improve the absorption function from the liquid permeable top sheet 6 to the absorber 5 even in repeated urination, thereby reducing the possibility of leakage.

An object of the present invention is to place the absorbent diffusion layer of a low basis weight thick non-woven fabric under the liquid permeable top sheet to improve the absorbency even in repeated urination to minimize the excrement to move outside the absorber, thereby preventing leakage An excellent disposable absorbent product is provided.

1 is a plan view showing one specific embodiment of a disposable absorbent article having an absorbing diffusion layer in accordance with the present invention.

FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1.

3 is a cross-sectional view taken along line B-B of FIG. 1.

※ Explanation of code for main part of drawing

1: forearm 2: crotch

3: rear waist portion 4: back seat

5 absorber 6 top sheet

7: coagulation band 8: absorption diffusion layer

9: tissue 10: waistband

11: fluffy pulp 12: super absorbent polymer

13: end of the corresponding band 14: front fastening means

15: Re-adhesive means 16: Coagulated band elastic body

17: Coupling band flap adhesive 18: Re-fastening means fixing

19: end adhesive portion 20: solidified band flap

21 side flap 22 inner side flap

23: Outer side flap 24: Coagulation band side flap

25: leg elastic D: disposable diaper

Disposable absorbent article having an absorbent diffusion layer according to the present invention, the liquid-permeable top sheet, the liquid-impermeable backsheet, the absorber positioned between the topsheet and the backsheet, the solidifying band and the absorbent product for the prevention of leakage In the disposable absorbent article comprising a fastening means for fixing to the wearer's body, it is made by attaching a low basis weight liquid permeable absorption diffusion layer below the liquid permeable top sheet.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Disposable absorbent article having an absorbing diffusion layer according to the present invention, the liquid permeable top sheet 6, the liquid impermeable back sheet 4, the absorbent body located between the top sheet 6 and the back sheet ( 5) In the disposable absorbent article comprising a solidification band (7) for preventing the occurrence of leakage and fastening means for fixing the absorbent article to the wearer's body, under the liquid-permeable top sheet (6), More specifically, the liquid permeable absorption diffusion layer 8 having a low basis weight is further mounted between the upper sheet 6 and the absorber 5.

1 is a plan view showing one specific embodiment of a disposable absorbent article having an absorbing diffusion layer according to the present invention.

As shown in FIG. 1, the disposable diaper D has an appearance in the form of an hourglass divided into a front waist part 1, a crotch part 2, and a back waist part 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.

FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line B-B of FIG.

Disposable absorbent article having an absorbing diffusion layer according to the present invention is inserted into the absorbent body 5 between the liquid impermeable back sheet 4 and the liquid transparent top sheet 6 to be fixed using a hot melt adhesive, The thickness of 5) is made by attaching the liquid permeable absorption diffusion layer 8 between the upper sheet 6 and the absorbent body 5 to provide a cushioning function to the wearer's skin and to maintain a quick absorbing force during urination. The liquid-permeable absorption diffusion layer 8 functions to absorb and diffuse urine body fluid and deliver it to the absorbent body 5. The body fluid once absorbed by the absorber body 5 flows back into the liquid-permeable upper sheet 6 It serves to block the work and to protect the absorber 5.

In general, the liquid permeable top sheet 6 is hydrophilized on the surface of a hydrophobic polypropylene filament having a thickness of 2 denier, and cut it into short staple fibers of 4 to 15 mm. Thereafter, the fibers are processed in a foamed state to be thermally bonded, or a bicomponent yarn composed of polyethylene / polypropylene or polyethylene / polyester having a thin thickness and a short fiber length is processed into a foamed state by heated air. It is manufactured by using non-woven fabric by air-through bonding. The basis weight of the conventional liquid permeable top sheet 6 was 18 to 26 g / m 2.

The liquid-permeable absorption diffusion layer 8 used in the present invention is composed of a nonwoven fabric having a basis weight of 15 to 28 g / m 2, preferably 18 to 25 g / m 2, and 4 to 6 denier, preferably 5 to 6 denier. It consists of a nonwoven made of yarn. In particular, the nonwoven fabric constituting the liquid-permeable absorption diffusion layer 8 is composed of a fiber selected from the group consisting of polyester synthetic fibers, polyethylene synthetic fibers, polypropylene synthetic fibers, cotton, pulp or a mixture of two or more thereof. Preferably, the outer side of the fiber is a polyester synthetic fiber or polyethylene synthetic fiber, and the inner side of the fiber is a bicomponent yarn composed of polyethylene synthetic fiber or polypropylene synthetic fiber. The limitation of the thickness of the yarn and the type of fiber affects the permeability of the liquid as the excreta, and the absorption diffusion layer 8 shows the optimum liquid permeability to the excrete once passed through the upper sheet 6. It serves to quickly deliver to the absorber (5) located below it to strengthen the leakage preventing function.

The nonwoven fabric constituting the liquid-permeable absorbing diffusion layer 8 is made of a fiber selected from the group consisting of fibers of cross-sectional shape circular, triangular, rectangular, star, etc., preferably cross-sectional shape It consists of a fiber which mixed circular fiber and the fiber of cross-sectional rectangular shape in the ratio of 10-90: 90-10.

The liquid-permeable absorption diffusion layer 8 having the above-described configuration is located between the liquid-permeable top sheet 6 and the absorbent body 5, and is well known in a known bonding method such as hot melt bonding, thermal bonding or ultrasonic bonding. It is then bonded together with each material to form a disposable absorbent product.

The absorbent body 5 is generally composed of fluffy pulp 11, superabsorbent polymer 12, and tissues 9 for wrapping them, but can be formed without using the tissues 9, and The performance depends on the content of the downy pulp 11 and the super absorbent polymer 12 constituting it. Absorber 5 used in the present invention may also be used the same or similar to the conventional absorber (5), as well as the T-shaped as well as the hourglass type or a straight type may be applied.

On the left and right sides of the outer side of the absorbent body 5, a solidification band 7 and a leg elastic body 25 are formed as leakage preventing means, and the solidification band 7 has a solidification band flap adhesion portion 17, a solidification band end portion 13, It consists of the terminal bonding part 19, the coagulation band elastic body 16, the coagulation band flap 20, and the coagulation band side flap 24. As shown in FIG. In the crotch band flap 20, at least a portion of the crotch portion 2 other than the terminal adhesive portion 19 stands up by the curd band elastic body 16 to form an absorbent pocket outside the absorber 5. Therefore, it functions as a pocket for confining the body fluid leaving the absorbent body 5 by the absorbent pocket formed by the coagulation band flap 20. The side flap 21 is divided into an inner side flap 22 and an outer side flap 23.

In addition to the configuration as described above, the fastening means used in the conventional disposable diaper may be used in the present invention similarly or similarly to serve to fix the absorbent product to the wearer's body. The fastening means is mainly a re-fastening means consisting of a re-fastening means fixing portion 18 and a free end portion that is not fixed to the edge of the side flap 21 of the back waist 3 of the disposable diaper (D) ( 15 and the front waist 1 are formed in the transverse direction, and the front fastening means 14 are provided to provide a target area to which the refastening means 15 can be bonded.

The waistband 10 is formed to improve the fit in the disposable absorbent product is also the same as or similar to the waistband 10 of the conventional disposable absorbent product, it is formed by attaching an elastic body to the waist of the disposable diaper. The elastic body constituting the waistband 10 is mainly used polyurethane foam, polyurethane film, polyurethane nonwoven elastic body and elastic yarn, and the like, polyurethane spandex or natural rubber is used as the elastic yarn. The elastic body constituting the waistband 10 may be formed over the entire width of the disposable diaper 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 formed to be short.

Hereinafter, preferred embodiments and comparative examples of the present invention will be described.

The following examples are intended to illustrate the invention and should not be understood as limiting the scope of the invention.

Example 1

Liquid-permeable top sheet 6, liquid-impermeable backsheet 4, absorber 5 located between the topsheet 6 and backsheet 4, and a coagulation band 7 for preventing leakage. And fastening means for fixing the absorbent article to the wearer's body, wherein the two-component, 6-denier-thick, composed of polyethylene / polyester under the liquid permeable top sheet 6 A disposable diaper was prepared by further attaching a 15 g / m 2 basis weight liquid permeable absorption diffusion layer 8 made of yarn.

Example 2

A disposable diaper was produced in the same manner as in Example 1 except that the basis weight of the liquid permeable absorbing diffusion layer 8 was 20 g / m 2.

Example 3

A disposable diaper was prepared in the same manner as in Example 1 except that the liquid permeable absorption diffusion layer 8 having a basis weight of 25 g / m 2 was used.

Example 4

A disposable diaper was carried out in the same manner as in Example 1, except that a 28 g / m 2 basis weight liquid permeable absorption diffusion layer 8 composed of two-component, four-denier-thick yarn composed of polyethylene / polyester was used. Prepared.

Example 5

Example 1 except that a liquid permeable absorption diffusion layer (8) having a basis weight of 28 g / m 2 composed of two-component, 6-denier-thick yarns and 4-denier-shaped one-sided yarns composed of polyethylene / polyester was used. Doing the same to prepare a disposable diaper.

Comparative Example 1

A disposable diaper was carried out in the same manner as in Example 1 except that a 20 g / m 2 basis weight liquid permeable absorption-diffusion layer 8 composed of two-component, two-denier-thick yarn composed of polyethylene / polyester was used. Prepared.

Comparative Example 2

A disposable diaper was carried out in the same manner as in Example 1, except that a liquid permeable absorption-diffusion layer 8 having a basis weight of 35 g / m 2 composed of two-component, two-denier-thick yarn composed of polyethylene / polyester was used. Prepared.

Comparative Example 3

A disposable diaper was carried out in the same manner as in Example 1, except that a 55 g / m 2 basis weight liquid permeable absorption diffusion layer 8 composed of polyethylene, polyester, and two-density four-denier yarns was used. Prepared.

Experimental Example 1

The urination rate of the disposable diaper prepared by the above Examples and Comparative Examples and the evaluation of the occurrence of leakage by the mannequin were performed as follows, and the results are shown in Table 1 below.

In the measurement of the rate of absorption, 10 ml of 0.9% aqueous sodium chloride solution permeated through the liquid permeable top sheet 6 was applied once, and 5 minutes after the first measurement, the rate of permeation was applied to the same spot for 2 minutes. It was. As a measuring instrument, a Lister (manufactured by Lenzing AG Co., Austria) was used.

Samson development evaluation using a mannequin was used MTS TEFO tester (large), while maintaining the posture lying on the mannequin, urine at 7ml / sec. While measuring the amount of urine absorbed at the time of gland development.

Absorption rate evaluation Sampling Assessment (g) Absorption diffusion layer 8 (sec./ml) Absorption diffusion layer (8) Applicable diaper (sec./ml) Primary Secondary 3rd Primary Secondary 3rd Example 1 2.7 3.2 3.6 24 32 50 86 Example 2 2.3 3.1 3.5 19 25 38 98 Example 3 2.3 3.0 3.5 22 31 40 96 Example 4 2.6 3.1 3.7 26 35 43 91 Example 5 2.4 3.0 3.4 23 31 42 95 Comparative Example 1 5.1 7.2 8.6 32 58 91 69 Comparative Example 2 3.2 4.1 4.8 27 47 66 83 Comparative Example 3 2.5 3.0 3.9 20 31 45 87

Experimental Example 2

Sensory evaluation was performed on 100 actual consumers who had babies corresponding to a baby's weight of 6 to 1 kg in order to evaluate the practical use of the leakage of disposable diapers manufactured according to the above examples and comparative examples. And the results are shown in Table 2 below.

The criteria for sensory evaluation are as follows.

(+): No glands during disposable diaper use.

(±): Small amount of leakage occurs during disposable diaper use.

(-): Spring occurs during disposable diaper use.

Very good: When (+) is above 90%

Excellent: When (+) is 70 to 90%

Normal: When (+) is less than 70%

Sam occurrence result + ± - Judgment Example 1 88 7 5 Great Example 2 90 6 4 Very good Example 3 93 4 3 Very good Example 4 86 9 5 Great Example 5 91 6 3 Very good Comparative Example 1 67 24 9 usually Comparative Example 2 76 18 6 Great Comparative Example 3 82 14 4 Great

Table 1 is an evaluation of the rate of absorption between the products of the examples and products of the comparative example and the absorption capacity up to the time of the occurrence of the gland in a laboratory lying sideways with a mannequin (baby model), In the absorbent product according to the present invention represented by the present invention, it was confirmed that the prevention effect against the urine absorption rate and the occurrence of spring is excellent even at a low basis weight, and the above Table 2 is a sensory evaluation used by actual users. It was confirmed that the absorbent product according to the present invention can greatly reduce the occurrence of leakage compared to the comparative examples.

Therefore, according to the present invention, even if the posture lying on the side or the like can greatly reduce the occurrence of the phenomenon, there is an effect of providing a disposable absorbent product having a high effect of suppressing the occurrence of leakage.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

Claims (7)

delete delete delete Disposable absorption including liquid permeable top sheet, liquid impermeable back sheet, absorber located between the top sheet and back sheet, coagulation band for preventing leakage and fastening means for fixing the absorbent product to the wearer's body In the product, Under the liquid permeable top sheet is made by further mounting a liquid-permeable absorption diffusion layer composed of a low basis weight nonwoven fabric having a basis weight of 15 to 28 g / ㎡ and made of 4-6 denier yarn, Non-woven fabric constituting the liquid-permeable absorption diffusion layer is a disposable with an absorption diffusion layer, characterized in that made of a fiber selected from the group consisting of polyester synthetic fibers, polyethylene synthetic fibers, polypropylene synthetic fibers, cotton, pulp or a mixture of two or more thereof Absorbent products. The method of claim 4, wherein The nonwoven fabric constituting the liquid-permeable absorption diffusion layer is made of a fiber made of a bicomponent yarn composed of a polyester synthetic fiber or polyethylene synthetic fiber on the outer side of the fiber and a polyethylene synthetic fiber or polypropylene synthetic fiber on the inner side of the fiber. Disposable absorbent article with a diffusion layer. delete delete