KR20080081456A - Diaper included having micro-fiber fabric layer - Google Patents

Abstract

A disposable absorbent article having micro-fiber fabric layers is provided to prevent intrusion of germs and bacteria from viscous fluid bodily wastes into the skin of a wearer and to keep the skin dry. A diaper(100) comprises an upper sheet in a laminate structure of micro-fiber fabric layers, a bottom sheet(30), an absorbent, a gather(40), a waist band, and a connecting part. The gather is constituted by inner gather(40A) and outer gather(40B), each of which is formed by folding a double-layer flap(41) made of a liquid water-impermeable film such as hydrophobic non-woven fabric or water-resistance non-woven fabric; a flap adhesive part(42); an end part(43); an end adhesive part; and inner and outer flaps(46,47). Further, at least one elastic body is insert-coupled to a space between the flap adhesive part and the end part.

Description

Disposable absorbent product containing microfiber fiber layer {Diaper included having micro-fiber fabric Layer}

1 is a plan view of a disposable absorbent article (diaper) according to the prior art which is most commonly used.

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

3 is a plan view of a disposable absorbent article (diaper) according to an embodiment of the present invention.

4 is a cross-sectional view showing a preferred embodiment of a multilayer sheet according to the present invention.

5 is a cross-sectional view taken along line II of FIG. 3.

6 is a perspective configuration diagram of the disposable diaper shown in FIG. 3.

7 is a cross-sectional view of a disposable absorbent article (diaper) according to another embodiment of the present invention.

8 is a cross-sectional view of a disposable absorbent article (diaper) according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: upper sheet 20: absorber

24 absorbing diffusion layer 25 absorbing core

26: tissue 30: back sheet

32: plastic film 34: nonwoven fabric

40: gang band 41: gang band flap

42: coagulation band flap adhesion portion 43: coagulation band end portion

44: coagulation band terminal adhesive portion 45: coagulation band elastic body

46: Coagulation band inner flap 47: Coagulation band outer flap

50: waist band 60: fastening means

70: multilayer sheet 72: general fiber layer

74: microfiber fiber layer 100: disposable diapers

The present invention relates to a disposable absorbent product, and more particularly, the surface contacting the wearer's skin is composed of a multi-layered sheet including a microfiber fiber layer and a general fiber layer, resulting from different fiber thicknesses of the microfiber fiber layer and the general fiber layer. Due to the capillary effect caused by a density difference, the secretion is absorbed more quickly and the absorbing capacity is increased so that no traces of the secretion remain on the wearer's skin so that it stays dry. It relates to a disposable absorbent product that can sufficiently protect the wearer's skin.

Disposable absorbent products absorb body fluids such as blood, urine and menstrual blood to provide a hygienic and convenient environment during use. Generally, disposable absorbent products absorb products secreted by various physiological actions of the wearer, for example, urine, feces, menstrual discharge and vaginal discharge. More specifically, disposable diapers used by infants or incontinence (Disposable Diaper), Women's Sanitary Napkin, Panty Liner, etc.

In general, such disposable absorbent products include a liquid permeable topsheet in contact with the skin, an absorbent that absorbs and retains secretions that pass through the topsheet, and a liquid impermeable back that prevents secretions from leaking out of the absorber to the outside. It is configured to include a seat, and preferably has a fastening means to be fixed to the body.

1 and 2 show a conventional diaper most commonly used among disposable absorbent products. 1 is a plan view of the diaper D with the inner surface of the diaper D facing the viewer, and FIG. 2 is a partial cross-sectional view taken along the line A-A of FIG.

1 and 2, the disposable diaper (D) is the front waist portion (1), the crotch portion (2) located in the crotch portion of the front portion of the wearer to focus on absorbing secretions and the back portion of the wearer It can be divided into a rear waist portion (3) located in. And a liquid permeable top sheet 6 that is in direct contact with the wearer's skin when worn, a liquid impermeable backsheet 4 that forms an outer surface when worn, between the top sheet 6 and the back sheet 4 Absorbent core (5), the waistband 21 is formed with elastic means, inner and outer solidification band (8) (9) and fastening means (19) (20) and the like. At this time, the absorbent diffusion layer 7 preferably disposed above the absorbent core 5 to disperse secretions, and positioned below the absorbent core 5 to prevent the absorbent core 5 from lumping or curling. The tissue 10 has a bonded structure. In addition, an elastic body 15 is inserted into the inner and outer side solidification bands 8 and 9, and the back sheet 4 is positioned at the outer side of the film 22 and the liquid impermeable plastic film 22. It has a structure in which the nonwoven fabric 23 which gives a soft touch is joined.

The conventional disposable absorbent product including the diaper (D) as described above absorbs the secretion faster so that traces of the secretion (for example, urine, blood, menstrual blood, etc.) do not remain in the liquid permeable top sheet 6 and absorbs the core 5. ) To increase the absorption capacity of the absorbent core 5 and to make the thickness thinner to provide comfort in use. This makes it possible to wear disposable absorbent articles for a relatively long time.

However, the conventional disposable absorbent product has a low absorption rate, absorption capacity, and the like, so that traces of the secretion remain on the liquid permeable top sheet 6, so that the skin is easily soaked by moisture and heat of the secretion, and various bacteria contained in the secretion There remains a problem that penetrates the weakened skin and adversely affects the skin of newborns and infants, especially those sensitive to irritation. In particular, the liquid permeable top sheet 6 is in contact with the wearer's skin in the widest area, the absorption rate and absorption capacity is low, causing the secretion to remain on the skin causing sores.

The present invention is to solve the problems with the conventional disposable absorbent product as described above, by making the surface contacting the wearer's skin when wearing a material having a high absorption rate and absorption capacity, the traces of discharge on the wearer's skin In order to provide disposable absorbent products that do not remain to prevent skin penetration of bacteria present in the secretions, and to keep them dry so that they can sufficiently protect the wearer's skin from moisture and heat even if they are not frequently changed. There is a purpose.

The present invention for achieving the above object is a disposable absorbent product, the surface in contact with the skin of the wearer is composed of a multi-layer sheet comprising a microfiber fiber layer and a general fiber layer, the fiber thickness constituting the microfiber fiber layer is general A disposable absorbent article is provided that is at least 1/5 thinner than the fibers constituting the fibrous layer, wherein the normal fibrous layer is directed toward the skin side of the wearer.

At this time, the microfiber fiber layer is preferably composed of microfiber fibers 1/10 or more thinner than the general fiber layer.

The disposable absorbent article of the present invention is preferably a diaper which has a liquid permeable top sheet, an absorbent which absorbs and retains secretions that have passed through the upper sheet, and a liquid impermeable to prevent leakage of secretions from the absorbent to the outside. The back sheet of the, and the liquid impermeable coagulation band to prevent the secretion leakage into the crotch portion, and the waist band elastically close to the waist toward the body.

At this time, the diaper, the top sheet is composed of a multi-layer sheet, or the absorber is composed of an absorbent core and an absorption diffusion layer, the absorption diffusion layer may be composed of a multilayer sheet. In addition, the top sheet and the absorption diffusion layer may be configured in a form that is replaced by a multi-layer sheet.

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

The disposable absorbent article of the present invention is included in the present invention as long as the surface in contact with the skin of the wearer is constituted by the multilayer sheet 70 (see FIG. 4) described below. For example, the disposable absorbent article of the present invention may be of a conventional structure, wherein the surface or the entire material of the component in contact with the skin of the wearer is composed of a multilayer sheet 70, or of a conventional structure. As a separate component, the multi-layered sheet 70 according to the present invention may have a structure further bonded in the direction in which it is in contact with the skin.

Disposable absorbent products according to the present invention include disposable diapers, feminine sanitary napkins and panty liners used by infants or incontinents.

3 to 7 illustrate a disposable diaper 100 worn by an infant among disposable absorbent products. Disposable diaper 100 described below is a preferred embodiment of the present invention. 3 is a plan view according to an embodiment of the disposable diaper 100, Figure 4 is a cross-sectional view of a multi-layer sheet 70 according to the present invention, Figure 5 is a cross-sectional view of the line I-I of FIG. 6 is a perspective configuration diagram of the disposable diaper 100 shown in FIG. 3, and FIG. 7 is a cross-sectional view according to another embodiment of the disposable diaper 100.

Disposable diaper 100 shown in the figure has a structure in which the top, bottom, left and right symmetry in the form of an hourglass. The diaper 100 does not necessarily have to be symmetrical in up, down, left and right, but preferably has a symmetrical structure as shown. For convenience of description, the part located at the front part of the wearer is located at the front waist part (A), the crotch part is located at the front of the wearer, and the part located at the back part is the crotch part (B), and the part located at the back part of the wearer is located at the rear waist part ( C).

The term "bonding" used in the present invention is a solid adhesive, a hot melt adhesive, a sealing (sewing), or a combination of components constituting the diaper 100, such as heat or ultrasonic wave, or the intermittent intermittent It is combined with.

The diaper 100 includes a top sheet 10 which contacts the skin of the wearer with the largest area among the constituent elements, a back sheet 30 that forms an outer surface when worn, and the top sheet 10 and the back sheet. Absorber 20 positioned between the 30, the corresponding band 40 has a predetermined width and longitudinally coupled in the longitudinal direction (vertical direction in Figure 3), the waist band 50 formed in the rear waist portion (C), And it has a fastening means 60 for fixing to the body.

The topsheet 10 is liquid permeable to quickly pass liquid secretions toward the absorbent 20, which is bonded to the absorber 20 and the backsheet 30, with the central region bonded to the absorber 20. The magnetic field region is bonded to the back sheet 30.

The absorber 20 is to absorb and retain the secretion passed through the top sheet 10, which is located between the top sheet 10 and the back sheet (30). The size and shape (eg, rectangular, hourglass, T-shaped, asymmetrical, etc.) of the absorbent body 20 may be variously configured. The absorber 20 includes at least an absorbent core 25 made of fluff pulp and a super absorbent polymer. The fluffy pulp is a pulverized fibrous web or wood pulp, and the superabsorbent polymer is an acrylic acid polymer crosslinked product, a vinyl alcohol-acrylate copolymer crosslinked product, maleic anhydride graft polyvinyl alcohol crosslinked product, acrylic Cross-linking products of the acid-methacrylate copolymer crosslinked products, cross-linking products of the methyl acrylate-vinyl acetate copolymers, cross-linking products of the starch-acrylate graft copolymers, and starch-acrylonitrile graft copolymers. Particles alone or in combination of two or more selected from water, a carboxymethyl cellulose crosslinked product, an isobutylene-maleic anhydride copolymer crosslinked product, a methylene oxide polymer crosslinked product and the like can be usefully used. At this time, cotton pulp is 10 to 80% by weight, preferably 20 to 50% by weight of the total weight of the absorbent core 25, the superabsorbent resin is 20 to 90% by weight, preferably 50 of the total weight of the absorbent core 25 ~ 80% by weight is good.

The absorber 20 preferably absorbs the secretion that has passed through the upper sheet 10 at a high speed to disperse the secretion in all areas of the absorbent core 25 and prevents the absorbent core 25 from agglomerating. The absorption diffusion layer 24 can be provided. The absorption diffusion layer 24 may be usefully used a non-absorbent fabric of high absorption.

In addition, the absorbent body 20 preferably further includes a tissue 26 that improves the tensile strength of the absorbent core 25 and prevents the absorbent core 25 from being lumped or rounded. At this time, the absorption diffusion layer 24 is located between the upper sheet 10 and the absorbent core 25, the tissue 26 is bonded to the upper surface and / or lower surface of the absorbent core 25 or the absorbent core ( 25) may be bonded in a form of wrapping the periphery of the absorbent core 25. In FIG. 5, the absorbent body 20 includes an absorption diffusion layer 24, an absorbent core 25, and a tissue 26, and the tissue 26 is a single layer bonded to the lower surface of the absorbent core 25. It was.

The backsheet 30 prevents leakage of secretion to the outside to prevent contamination of the wearer's clothing or the surrounding environment, which has at least a liquid impermeable plastic film 32. The plastic film 32 is liquid impermeable and preferably gas permeable. The plastic film 32 constituting the back sheet 30 is formed by adding (injecting or extruding) inorganic materials such as calcium carbonate to the plastic so that fine pores are formed in the film so that steam from the absorbent core 25 escapes. Allow me to go out. A suitable material for molding the plastic film 32 is a thermoplastic film having a weight per unit area of 10 g / m 2 to 30 g / m 2, and preferably a polyethylene film or a polypropylene film is useful. Can be used.

In addition, the back sheet 30, preferably as shown in Figure 5 is further configured to further comprise a non-woven fabric (34) to impart a soft touch (softness).

At this time, the plastic film 32 is bonded to the absorber 20, the nonwoven fabric 34 is bonded to the plastic film 32, the nonwoven fabric 34 forms the outermost surface of the diaper 100. The plastic film 32 and the nonwoven fabric 34 may have the same size as the width and length of the diaper 100, but preferably, the plastic film 32 has the same size as the width of the absorbent body 20 in the transverse width. The nonwoven fabric 34 is reduced in size and bonded to the same size as the entire transverse width of the diaper 100.

The coagulation band 40 is to prevent the secretion released from the absorber 20 to leak into the crotch portion (left and right when viewed in Figure 5), which is formed on the left and right sides of the absorber 20 and is liquid impermeable. Such a solid band 40 has a solid band elastic body 45, at least in the crotch portion (B) to stand by the elastic body 45 to form a pocket (pocket) in which secretion is stored. Accordingly, the liquid secretion may be temporarily stored in a pocket without being leaked to the left and right sides of the diaper 100 by being trapped by the coagulant 40 and may be absorbed into the absorber 20.

In addition, the corresponding band 40 is preferably composed of an inner corresponding band 40A and an outer corresponding band 40B as shown in FIG. As such, when the solidification band 40 is composed of the inner solidification band 40A and the outer solidification band 40B, it is possible to more firmly prevent leakage of secretion. At this time, referring to Figure 5, the inner side band 40A and the outer side band 40B is preferably composed of one flap 41 is folded.

As the flap 41 constituting the solid band 40, a liquid impermeable film such as a hydrophobic nonwoven fabric or a waterproof nonwoven fabric is used. When the hydrophobic nonwoven fabric is used as the flap 41, the curing band 40 may be composed of two-ply flaps 41 to enhance the hydrophobic effect, wherein the two-ply flaps 41 are solid. It can be bonded with an adhesive. And the flap 41 is preferably a weight per unit area of 13g / ㎡ ~ 28g / ㎡.

On the other hand, the rotatable band 40 may be divided into a rotatable band flap adhesive portion 42, a rotatable band end portion 43, the rotatable band end adhesive portion 44, and the inner flap 46 and the outer flap 47.

At this time, the corresponding band flap adhesive part 42 is a point where the corresponding band flaps 41 are bonded to each other so that a space into which the corresponding band elastic body 45 can be inserted is provided. One or more corresponding band elastic bodies 45 are inserted and coupled into the space provided as described above, that is, the corresponding band flap 41 is folded between the corresponding band flap adhesive portion 42 and the corresponding band end portion 43.

The solid band elastic body 45 is for making the solid band end portion 43 adhere to the skin well, which is coupled to at least the crotch portion B of the solid band 40A, 40B. An elastic thread is useful as the solid band elastic body 45, and the elastic thread is made of, for example, polyurethane spandex or natural rubber. At this time, the elastic modulus of the curd band elastic body 45 may have a range of 150 to 230%, preferably to have an elastic modulus of 180 to 200%. Here, for example, '200% modulus of elasticity' means that the length of the elastic body 45 in the initial contracted state is 100, the maximum length of which is 200.

The rostrum band distal end 43 is a portion standing up by the roag band elastic body 45 to be in close contact with the skin. And the coagulation band end adhesive part 44 is the point where the longitudinal end part of the coagulation band flap 41 is joined to the front waist part A and the rear waist part C of the diaper 100 (refer FIG. 3). The corresponding band end adhesive portion 44 is preferably located about 30 ~ 100mm from the end of the front waist (A) and the rear waist (C).

In addition, the corresponding band inner flap 46 is a corresponding band flap 41 indicating a portion extending from the inner corresponding band 40A and the outer corresponding band 40B, and the corresponding band outer flap 47 is an outer corresponding band ( A corresponding band flap 41, which points at 40B), extends to the transverse edge. The inner flap 46 and the outer flap 47 are bonded to the top sheet 10 or the back sheet 30 so that the coagulation band 40 is fixed to the diaper 100. For example, when the top sheet 10 extends to the portion having the inner and outer flaps 46 and 47, the upper sheet 10 is bonded and fixed to the upper sheet 10, and the upper sheet 10 is attached to the corresponding band flap adhesive portion 42. ) Is extended to only the vicinity, and is bonded and fixed to the back sheet 30. The width (lateral length) of the inner and outer flaps 46 and 47 can be set to 15 to 50 mm, but preferably 15 to 35 mm.

The waistband 50 is located at the rear waist portion C of the diaper 100, which elastically closes the waist portion of the diaper 100. Waist band 50 may be composed of an elastic body coupled to the elastic band or inelastic band, for example, polyurethane foam (polyurethane foam) sheet, polyurethane film (polyurethane film), polyurethane nonwoven fabric, or natural Fiber (or synthetic fiber) It can be used that the elastic yarn is bonded to the nonwoven fabric. Polyurethane spandex or natural rubber may be usefully used for the elastic chamber. The waistband 50 may be formed over the entire width (lateral direction) of the diaper 100, or may be formed to be partially short.

In addition, the diaper 100 has a fastening means 60 to be fixed when worn on the body. The fastening means 60 may be usefully used as a mechanical fastening means such as a velcro, a re-adhesive tape, a hook and loop system. The fastening means 60 is, for example, a target portion 62 which is bonded to the back sheet 30 of the front waist portion A and provides an adhesive region of the adhesive portion 64, and the rear waist portion C. And a fixing part 63 fixed to the back sheet 30 of the < RTI ID = 0.0 >), < / RTI > Can be.

In the diaper 100 configured as described above, a part or all of the surfaces in contact with the skin according to the present invention is composed of a multilayer sheet 70.

Referring to FIG. 4, in the present invention, the multilayer sheet 70 includes a microfiber layer 74 and a general fiber layer 72 laminated to the microfiber layer 72. At this time, the general fiber layer 72 is disposed to face the skin side of the wearer. The general fiber layer 72 and the microfiber layer 74 are laminated in a form in which they are tightly coupled to each other by a bonding means such as a solid adhesive, a hot melt adhesive, a sealing, a heat or an ultrasonic wave, or are intermittently bonded to each other. One, and those laminated simply in a stacked form without the above coupling means.

In the present invention, the 'microfiber fiber layer 74' means that the fiber composed of a thinner than the normal fiber layer 72, the 'normal fiber layer 72' is used in the field of disposable absorbent product manufacturing It means a woven or nonwoven fabric made of thick fibers. Specifically, the fibers constituting the microfiber fiber layer 74 is composed of fibers having a thickness of 1/5 or more thinner than the fibers constituting the general fiber layer 72. Preferably, the microfiber fiber layer 74 is preferably composed of microfibers 1/10 or more thinner than the normal fiber layer 72.

In addition, the microfiber layer 74 is a polyester (polyester) and nylon (Nylon) mixture, a mixture of polypropylene and nylon (Nylon), polyethylene (Polyethylene) and nylon (Nylon) mixture, 0.5 Denier (D, denier) It is preferable that it is comprised from the ultrafine fiber of thickness below. In the present invention, "denier" (D, denier) is a general thickness unit indicating the thickness of the synthetic yarn, it means that the weight of the yarn in 9km synthetic yarn expressed in grams (g). Fiber thickness that is commonly used in the field of disposable absorbent product manufacturing, that is, the fiber thickness constituting the general fiber layer 72 is usually used 1g ~ 5g (1D ~ 5D), the fiber constituting the microfiber fiber layer 74 is 0.5 g (0.5D) or less is preferable. In recent years, technology has advanced so that microfiber denier can be produced up to 0.05g (0.05D).

According to the present invention, the general fiber layer 72 is disposed to face the skin, wherein the microfiber fiber layer 74 and the general fiber layer 72 are different in density due to different fiber thicknesses, resulting in the capillary effect The secretions are absorbed more quickly. In addition, the microfiber layer 74 having a fiber thickness of 1/5, preferably 1/10 or more, compared to the general fiber layer 72 has a large surface area and high absorption capacity of the secretion to keep the skin dry. More specifically, the microfiber fiber layer 74 is densely organized into microfiber (0.5D or less) to have excellent absorption and wiping properties. Accordingly, it provides a grounding area larger than that of a general thickness yarn, that is, a general fiber layer 72, and forms a myriad of pores (Hole) in the fiber tissue to absorb more moisture, and prevents the general fiber layer 72 and the capillary phenomenon. Raises the rate of absorption. Accordingly, traces of secretions do not remain on the wearer's skin to prevent bacterial invasion in the secretions and to be kept dry so that the skin of the wearer is sufficiently protected from moisture and heat even when it is not frequently changed. Prevent side effects such as sores.

The multi-layered sheet 70 as described above is applied to the surface of the disposable absorbent article (diaper, etc.) of the present invention in contact with the skin. At this time, the disposable absorbent article of the present invention preferably has the largest area with the skin when worn. The upper sheet 10 in contact is composed of a multilayer sheet 70, or the absorption diffusion layer 24 positioned between the upper sheet 10 and the absorbent core 25 is composed of a multilayer sheet 70. In addition, both the top sheet 10 and the absorption diffusion layer 24 may be composed of a multi-layer sheet (70). At this time, when the upper sheet 10 or the absorption diffusion layer 24 is composed of a multilayer sheet 70, the entire upper sheet 10 or the absorption diffusion layer 24 is composed of a multilayer sheet 70, or the secretion is concentrated It can be configured as a multilayer sheet 70 only in the portion to be excised as. In addition, the disposable absorbent article according to the present invention may have a structure in which the multilayer sheet 70 is further bonded to the upper surface of the upper sheet 10 or between the upper sheet 10 and the absorption diffusion layer 24. have.

In the accompanying drawings, Figure 3 illustrates the absorption diffusion layer 24 is composed of a multi-layer sheet 70, Figure 5 illustrates the top sheet 10 is composed of a multi-layer sheet 70 FIG. 7 illustrates a state in which the multilayer sheet 70 is further bonded to the upper surface of the upper sheet 10 separately.

In addition, the disposable absorbent article of the present invention, as shown in Figure 8, the multilayer sheet 70 is bonded to the upper portion of the absorbent core 25, the multilayer sheet 70 is absorbed with the top sheet 10. It may be configured to replace the diffusion layer 24. In addition, the coagulation band 40 or the waistband 50 is composed of a multi-layer sheet 70, or the multi-layer sheet 70 on the entire surface or part of the surface of the coagulation band 40 or waistband 50 ) May have a more bonded structure.

The microfiber layer 74 and the general fiber layer 72 constituting the multi-layer sheet 70 as described above are nonwoven fabrics or fabrics, in the same manner as in the conventional method of manufacturing the liquid permeable top sheet 10 or the absorption diffusion layer 24. It can manufacture. For example, it can be manufactured by the thermal bond method of pressing and sheeting each other through two calender rolls, and drawing an air draw by blowing a hot air known by other known techniques. Bond method, spun bond method for spinning long fibers into continuous filaments, compressing them into two calender rolls, sheeting them, spun lace method for tangling the filaments with high water pressure, and other needle punch and chemical bond methods It can be prepared by.

In addition, the multilayer sheet 70 according to the present invention has a structure in which a general fiber layer 72 composed of fibers of about 5D and a microfiber layer 74 composed of fibers of 0.5D or less are alternately laminated with at least two or more. As such, when the general fiber layer 72 and the microfiber fiber layer 74 are alternately mixed and configured, the capillary effect is improved between the two layers to absorb the secretion faster, and the enlarged surface area of the microfiber fiber layer 74 can be obtained. Due to this can absorb a larger amount of secretions.

In addition, the multi-layered sheet 70 preferably contains 10% by weight or more of the microfiber fiber layer 74, more preferably 50% by weight or more of the microfiber fiber layer 74.

On the other hand, when the multilayer sheet 70 according to the present invention is applied to the upper sheet 10 or the absorption diffusion layer 24, even if partially applied to the portion where the secretion is concentrated, the effect is excellent, and thus the secretion is When only the portion that is intensively excreted is applied to the multi-layer sheet 70 can reduce the manufacturing cost of the disposable diaper 100 to allow the user to use the disposable diaper 100 excellent quality at a lower cost.

In general, when the disposable diaper 100 is worn, the penis of the infant is positioned at a distance of 11.5 cm from the front of the absorbent core 25 in the front waist portion A of the disposable diaper 100, wherein the front and rear are within 10 cm. Secretions are concentrated in the distance. Therefore, when the multilayer sheet 70 of the present invention is applied only to the portion where the secretion is concentrated, the front portion of the disposable diaper 100 may cover 2 to 35 cm from the front of the absorbent core 25. It is preferable to manufacture so that it is 2 to 22 cm more preferably.

Hereinafter, test examples of the present invention will be described.

Example 1

The general fiber layer 72 manufactured by the thermal bond method, which is a conventional nonwoven fabric manufacturing method, using the general fiber of 1D to 5D thickness, and the microfiber fiber layer manufactured by the thermal bond method using the microfiber fiber of 0.5D or less, Laminated, but the laminated sheet was applied to the specimen according to the present embodiment so that the general fiber layer 72 is 90% by weight, the microfiber fiber layer 74 is 10% by weight.

[Examples 2 to 9]

Laminated so that the 80% by weight of the normal fiber layer 72, 20% by weight of the microfiber fiber layer 74 (Example 2), 70% by weight of the general fiber layer 72, 30% by weight of the microfiber fiber layer 74 Laminated to be (Example 3), the general fiber layer 72 is 60% by weight, the microfiber layer 74 is laminated so that 40% by weight (Example 4), the general fiber layer 72 is 50% by weight, Laminated so that the microfiber layer 74 is 50% by weight (Example 5), Laminated so that the general fiber layer 72 is 40% by weight, and the microfiber layer 74 is 60% by weight (Example 6), Laminated so that the general fiber layer 72 is 30% by weight, the microfiber fiber layer 74 is 70% by weight (Example 7), 20% by weight of the general fiber layer 72, 80% by weight of the microfiber fiber layer 74 Except for laminating (Example 8), the general fiber layer 72 is 10% by weight, the microfiber layer 74 is laminated so that 90% by weight (Example 9) It carried out similarly to Example 1.

Comparative Example 1

Sheets prepared by the thermal bond method, which is a conventional nonwoven fabric manufacturing method, using general fibers of 1D to 5D thickness were applied as specimens. That is, the sheet composed only of the general fiber layer 72 was applied to the specimen of Comparative Example 1.

About the sheet specimens according to Examples 1 to 9 and Comparative Example 1 prepared as described above, the absorption rate and the amount of Re-wet were measured by the following method, and the results are shown in [Table 1].

[Absorption rate test method]

1) Prepare sheet specimens 100mm wide and 100mm long.

2) Prepare 10 sheets of postlip paper / ERT FF3.

3) Prepare artificial urine in 0.9% NaCl aqueous solution.

4) Place the sheet specimen on 10 sheets of blotter paper and mark in the center of the sheet specimen. (At this time, in the case of the multilayer sheets of Examples 1 to 9, the microfiber fiber layer 74 was directed toward the absorbent paper surface.)

5) Inject 10ml of artificial urine into the absorption rate meter (Lister / Lenzing Ag).

6) Operate the absorption rate meter to measure the rate of penetration of artificial urine by injecting artificial urine into the area indicated on the sheet specimen.

[Re-Wet Experiment Method]

1) Prepare sheet specimens 100mm wide and 100mm long.

2) Prepare 3 sheets of absorbent paper (Postlip paper / ERT FF3) and measure the weight.

3) Prepare artificial urine in 0.9% NaCl aqueous solution.

4) After 15 ml of artificial urine was evenly moistened on the absorbent paper, the sheet specimen was placed. (In this case, in the case of the multilayer sheets of Examples 1 to 9, the microfiber fiber layer 74 was directed toward the absorbent paper surface.)

5) Place a weighed blotter paper (W1) on the sheet specimen.

6) Load for 2 minutes with a weight of 1kg on the blotter paper.

7) After 2 minutes, measure the weight of one blotter paper (W2).

8) Calculate the difference between W2 and W1 as a percentage.

<Property measurement result> sample Content of microfiber layer (% by weight) Absorption Rate (sec) Re-Wet (%) Comparative Example 1 - 8.27 18.59 Example 1 10 5.09 6.73 Example 2 20 4.04 4.48 Example 3 30 3.07 2.92 Example 4 40 2.22 1.36 Example 5 50 1.22 0.82 Example 6 60 1.14 0.68 Example 7 70 1.12 0.49 Example 8 80 1.10 0.41 Example 9 90 1.08 0.32

As shown in [Table 1], it can be seen that the absorption rate and the amount of Re-Wet are improved according to the ratio of the microfiber fiber layer 74.

Specifically, in the case of Example 1, in which the microfiber fiber layer 74 contained 10% by weight, according to the present invention, in comparison with the specimen (Comparative Example 1) composed of only the general fiber layer 72 as in the prior art, It can be seen that the absorption rate is improved by 38% and the amount of Re-Wet is reduced by 64%.

In addition, as the content ratio of the microfiber fiber layer 74 increases, the absorption rate increases and the amount of Re-Wet decreases. When the microfiber fiber layer 74 contains 50 wt% or more, the absorption rate increases and the amount of Re-Wet decreases. 85% or more, even if the ratio of the microfiber layer 74 is no longer increased it can be seen that the increase in the absorption rate and the decrease in the amount of Re-Wet is not significantly improved. As a result, it was found that the ratio of the microfiber fiber layer 74 is preferably 10% or more, more preferably 50% or more.

As described above, the present invention is composed of a multi-layer sheet 70 including a microfiber fiber layer 74 and a general fiber layer 72 in contact with the skin of the wearer when worn, the microfiber fiber layer 74 and the general fiber layer Density differences occur due to different fiber thicknesses from (72). Due to the capillary effect caused by the density difference, the secretion is absorbed more quickly (increased absorption rate), and the microfiber layer 74 having a fiber thickness of 1/5 or more, preferably 1/10 or more, compared to the general fiber layer 72. ) Increases the surface area's self-absorbing capacity so that no traces of secretions remain on the wearer's skin and keeps them dry.They protect the wearer's skin from moisture and heat even when not frequently changed. Have

Claims (8)

In disposable absorbent products, The surface in contact with the skin of the wearer is composed of a multi-layered sheet comprising a microfiber fiber layer and a general fiber layer, wherein the fiber thickness constituting the microfiber fiber layer is at least 1/5 thinner than the fibers constituting the general fiber layer, the general fiber layer is Disposable absorbent product, characterized in that disposed to face toward the skin side. The method of claim 1, The fibers constituting the microfiber fiber layer is a disposable absorbent product, characterized in that composed of fibers 1/10 or more thinner than the fibers constituting the general fiber layer. The method of claim 1, The fiber constituting the microfiber fiber layer has a thickness of 0.05 denier (D) to 0.5 denier (D) disposable absorbent product. The method of claim 1, The multilayer sheet is a disposable absorbent product, characterized in that the microfiber layer comprises 10% by weight to 90% by weight. The method according to any one of claims 1 to 4, The disposable absorbent article includes a liquid permeable top sheet, an absorbent for absorbing and retaining secretion that has passed through the upper sheet, a liquid impermeable backsheet for preventing secretion from leaking out of the absorber, and a crotch portion. Disposable absorbent product, characterized in that the diaper comprising a liquid impermeable coagulation band to prevent secretion leaking, and a waist band to elastically adhere the waist portion to the body. The method of claim 5, Disposable absorbent product, characterized in that the top sheet is composed of a multi-layer sheet. The method of claim 5, And said absorbent body comprises an absorbent core and an absorbent diffusion layer positioned between said absorbent core and said top sheet, wherein said absorbent diffuser layer is comprised of a multilayer sheet. The method of claim 5, And said absorbent body comprises an absorbent core and an absorbent diffusion layer positioned between said absorbent core and said topsheet, wherein said topsheet and said absorbent diffuser layer are comprised of a multilayered sheet.

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