KR20140028524A

KR20140028524A - Disposable absorbent article and preparation method thereof

Info

Publication number: KR20140028524A
Application number: KR1020120094989A
Authority: KR
Inventors: 한기영; 김서환; 강전영; 홍유경
Original assignee: 깨끗한나라 주식회사
Priority date: 2012-08-29
Filing date: 2012-08-29
Publication date: 2014-03-10

Abstract

The present invention relates to a disposable absorbent article comprising a surface sheet, an absorbent body and a back sheet, the surface sheet comprising a hydrophobic nonwoven sheet in which a plurality of hydrophilized depressions are arranged.

Description

Disposable absorbent article and its manufacturing method {DISPOSABLE ABSORBENT ARTICLE AND PREPARATION METHOD THEREOF}

The present invention relates to a disposable absorbent article and a method for manufacturing the same, and more particularly, to a disposable absorbent article and a method for manufacturing the same, which can reduce skin irritation while preventing the absorbed menstrual blood from reappearing on the skin.

The hygiene absorbent article includes a surface sheet for passing body fluids (for example, menstrual blood, etc.) that are contacted with the skin of a user and discharged by a physiological action, an absorber for absorbing and retaining the body fluid that has passed through the surface sheet, and a lower side of the absorber. And a back sheet positioned so that the body fluid retained by the absorbent does not leak, and optionally an absorbent transfer layer for transferring the body fluid supplied through the surface sheet to the absorbent between the surface sheet and the absorbent body. .

In general, the surface sheet is a sheet in contact with the user's skin. Therefore, the surface sheet is a non-woven fabric or a film having a soft touch to the user's skin, such as a perforated film, a spun-lace nonwoven fabric, and a through-air bonding nonwoven fabric. I use it.

However, in the art, a hydrophilic nonwoven fabric such as a nonwoven fabric made of hydrophilic fibers or a nonwoven fabric formed by mixing a small amount of hydrophobic fibers together with hydrophilic fibers is used in order to quickly absorb body fluids into a surface sheet in contact with the user's skin. .

Conventional surface sheets made of such hydrophilic nonwoven sheets can absorb body fluids quickly due to their hydrophilicity. However, a part of the body fluid absorbed in the surface sheet was not delivered to the absorber, but remained in the surface sheet and reappeared on the skin. In addition, due to the remaining body fluid, bacteria and the like grow, there is an unpleasant smell, the skin trouble occurs, and also cause a discomfort, etc., there is a problem of lowering the user's fit.

In the present invention, while rapidly absorbing body fluids (for example, menstrual blood, etc.) when worn by the user, the surface sheet is minimized in contact with the skin, thereby preventing the absorbed body fluids from reappearing on the user's skin and reducing skin irritation. An object of the present invention is to provide a disposable absorbent article and a method of manufacturing the same.

SUMMARY OF THE INVENTION The present invention provides a disposable absorbent article having a surface sheet comprising a hydrophobic nonwoven sheet having a plurality of hydrophilized depressions arranged to solve the above object.

In addition, the present invention comprises the steps of transferring the hydrophilic emulsion to the emboss surface of the embossing roller through a hydrophilic emulsion transfer roller that rotates in engagement with the embossing roller; Passing a hydrophobic nonwoven sheet between the rotating embossing roller and the rubber roller to form a plurality of depressions in the hydrophobic nonwoven sheet; A method of manufacturing a disposable absorbent article comprising the step of applying a hydrophilic emulsion delivered to the embossed surface of the embossing roller to the formed depression, wherein the depression forming step and the hydrophilic emulsion coating step are performed simultaneously or continuously. to provide.

In addition, the present invention comprises the steps of transferring the hydrophilic emulsion to the emboss surface of the embossing roller through a hydrophilic emulsion transfer roller that rotates in engagement with the embossing roller; Laminating the hydrophobic nonwoven sheet and the hydrophilic nonwoven sheet to form a laminated sheet; Passing the laminated sheet between the rotating embossing roller and the rubber roller to form a plurality of depressions in the hydrophobic nonwoven sheet; And applying a hydrophilic emulsion delivered to the emboss surface of the embossing roller to the formed depression, wherein the depression forming step and the hydrophilic emulsion application step are performed simultaneously or continuously. To provide.

In addition, the present invention provides a hydrophobic nonwoven sheet in which a plurality of hydrophilized depressions are arranged.

Disposable absorbent articles according to the present invention includes a hydrophobic nonwoven sheet having a plurality of hydrophilized depressions arranged as a surface sheet, so that the body fluid (eg, menstrual blood, etc.) is quickly absorbed through the hydrophilized depressions when the user wears the absorber Since the contact area between the surface sheet and the skin is reduced, the absorbed body fluid can not only be prevented from reappearing on the user's skin, but also skin irritation can be alleviated.

1 is a plan view showing a disposable absorbent article according to an example of the present invention.
FIG. 2 is a cross-sectional view of the disposable absorbent article of FIG. 1 taken along line AA. FIG.
3 is a cross-sectional view of the disposable absorbent article according to another example of the present invention as shown in FIG. 2.
Fig. 4 shows the shape of the depression formed in the surface sheet of the present invention.
5 schematically illustrates a process for making a disposable absorbent article in accordance with an example of the present invention.
6 schematically illustrates a process for manufacturing a disposable absorbent article according to another example of the present invention.

Hereinafter, the present invention will be described.

In the present invention, "disposable absorbent article" is a product that absorbs body fluids (eg, menstrual blood, vaginal discharge, cold / cold discharge, urine, etc.) that are excreted by various physiological actions, and do not wash, restore, or reuse after use. Say Examples include diapers, pant training pants, adult incontinence products, absorbent underwear, feminine hygiene products and feeding pads.

Disposable absorbent articles according to the invention are characterized in that they comprise a hydrophobic nonwoven sheet having a plurality of hydrophilized depressions arranged as a surface sheet. As a result, the disposable absorbent article of the present invention rapidly absorbs body fluid (eg, menstrual blood, etc.) through a hydrophilized depression when worn, and is delivered to the absorbent body or the absorbent delivery layer. Not only can be prevented, but also skin irritation can be alleviated because the contact area of the surface sheet with the skin is reduced.

1 to 3, a disposable absorbent article 1 according to the present invention is a hydrophobic nonwoven sheet in which the surface sheet 10 is composed of a plurality of recesses 11 and non- recessed surface portions 12. Wherein the recessed portion is hydrophilic surface treated with a hydrophilic emulsion to make it hydrophilic, and the other non- recessed surface portion is hydrophobic. Thus, the hydrophilized depression 11 can absorb the body fluid rapidly by interacting strongly with the body fluid relative to the non-dented surface portion 12 having hydrophobicity. Therefore, when the body fluid comes into contact with the surface sheet 10 of the present invention, the body fluid interacts strongly with the depression 11 relatively to the hydrophobic surface part 12. As a result, most of the body fluid can be rapidly absorbed by the depression 11 and quickly transferred to the absorbent body 20 or the absorption transfer layer 40 positioned below the surface sheet 10, wherein the depression 11 is performed. Even if a part of the body fluid remains in the), since the depression 11 is not in contact with the skin of the user, the remaining body fluid can be prevented from re-buying on the user's skin.

In addition, by including a plurality of depressions 11, the user's skin is in contact with the non-depressed surface portion 12 of the surface sheet, thereby reducing the friction area between the user's skin and the surface sheet, thereby reducing skin irritation. Can be alleviated.

In addition, since the non-depressed surface portion 12 is hydrophobic, as described above, the non-depressed surface portion 12 absorbs less body fluid relative to the depression portion 11 to dry (smooth). It is possible to maintain, thereby allowing the user to feel a dry touch when worn may improve the fit.

Disposable absorbent article 1 according to an example of the present invention, as shown in Figures 1 and 2, the surface sheet 10 for absorbing body fluids in contact with the wearer's skin; An absorbent body 20 positioned below the surface sheet to absorb and retain body fluids; And a back sheet 30 positioned below the absorber 20 to prevent leakage of body fluid held by the absorber to the outside. The surface sheet 10 includes a plurality of hydrophilized recesses 11. It includes a hydrophobic nonwoven sheet is arranged.

In addition, as shown in FIG. 3, the disposable absorbent article 1 includes an absorbent transfer layer including a hydrophilic nonwoven fabric under the surface sheet 10, specifically, between the surface sheet 10 and the absorbent body 20. 40 may further include. In this case, a second recessed portion 41 may be formed in the absorption transfer layer to correspond to the shape of the recessed portion 11 of the surface sheet 10.

Hereinafter, referring to Figures 1 to 4, each configuration of the disposable absorbent article according to the present invention will be described.

<Disposable absorbent article>

(1)

In the present invention, the surface sheet 10 is a liquid permeable sheet, which is a sheet that passes through body fluids (for example, menstrual blood, etc.) quickly and at the same time prevents the body fluids held by the absorber from flowing back to protect the skin of the user. The surface sheet 10 may be a multilayer sheet of one layer or two or more layers.

However, the surface sheet 10 of the present invention includes a hydrophobic nonwoven sheet in which a plurality of hydrophilized depressions 11 are arranged. Thereby, as described above, skin irritation can be reduced while preventing the absorbed body fluids from reappearing on the skin.

Unlike the non-depressed surface portion 12, the depression 11 is hydrophilic surface treated by a hydrophilic emulsion in the formation of the depression to impart hydrophilicity.

The hydrophilic emulsion may impart hydrophilicity to the hydrophobic nonwoven fabric, and is not particularly limited as long as it is known in the art. Examples of the hydrophilic emulsion include polyethylene glycol ester, polyoxyethylene alkyl sulfate, alkyl phosphate ester potassium salt, polyoxyethylene alkyl ester, alkyl sulfonate sodium salt, polyester, polyester modified silicone, sulfosuccinate, polyoxyethylene Amide ether, polyglycerol polyester, and the like, but is not limited thereto. These may be used alone or in combination of two or more. According to one example of the present invention, polyethylene glycol ester is used as a hydrophilic emulsion.

The content (coating amount) of the hydrophilic emulsion is not particularly limited and may be, for example, about 0.5 to 3 gsm.

The area ratio of such a depression is not particularly limited, but when it is about 20 to 50% based on the total area of the surface sheet, the friction area between the skin of the user and the surface sheet is minimized, and the body fluids excreted by physiological action are faster. Because it can be absorbed and delivered to the absorbent or absorbent delivery layer, it is possible to minimize the reappearance of the absorbed body fluids while maximally reducing skin irritation.

In addition, the shape of the recess is not particularly limited, and may be, for example, continuous linear or polygonal such as a circle or a square, but is not limited thereto (see FIG. 4).

The size of the depression is not particularly limited, and can be variously adjusted in consideration of the shape and area ratio of the depression. For example, when the shape of the depression is a continuous linear as shown in Fig. 4 (a), the size (width) of the depression may be about 0.5 to 3 mm, preferably about 0.8 to 2.5 mm. In addition, when the shape of the depression is a circle shown in Figure 4 (b), the size (diameter) of the depression may be about 0.5 to 2 mm. In addition, as shown in FIG. 4C, when the shape of the depression is a polygon such as a rectangle, a diagonal length of the depression may be about 1 to 3 mm.

In addition, the depth of the depression is not particularly limited. For example, when the depth of the depression is about 1 to 1.5 mm based on the case where the area ratio of the depression is about 40 to 50%, the inner wall of the depression is at an inclination of 45 °. Since it is formed to be inclined, the body fluid can effectively flow into the lower side of the depression to be absorbed and transferred to the absorption transfer layer or the absorbent body. In addition, when the depth of the depression is in the above range, the surface sheet becomes more bulky to soften the feel of the surface sheet, so that the absorbent article is less irritating to the user's skin even if the absorbent article is in direct contact with the wearer's skin. Less trouble may occur on the skin.

In addition, the separation distance between the one recessed portion and the other recessed portion is not particularly limited, but when it is about 2 to 3 mm, the bulky property is effectively exerted, which may cause less trouble on the user's skin.

Examples of hydrophobic nonwoven sheets usable in the present invention may be nonwoven sheets containing hydrophobic fibers or hydrophobic treated nonwoven sheets.

Here, the hydrophobic fiber refers to a fiber produced by hydrophobizing surface treatment of the surface of the fiber spun with a hydrophobic emulsion during fiber spinning, or a fiber showing hydrophobicity such as polyethylene fiber. Such hydrophobic fibers are preferably hydrophobic staple fibers, and non-limiting examples of hydrophobic staple fibers include N280 of HUVIS, ESC341 and ESC317 of ES FiberVision.

An example of a hydrophobic nonwoven sheet containing the hydrophobic fibers is a nonwoven sheet obtained by mechanically, chemically and thermally bonding (bonding) a web made of hydrophobic fibers. In addition, another example of the hydrophobic nonwoven sheet is obtained by mechanically, chemically and thermally bonding a web composed of a hydrophilic fiber or a hydrophilized surface-treated fiber (hereinafter, hydrophilic fiber) together with a hydrophobic fiber. There is also a nonwoven sheet. At this time, the content of the hydrophilic fiber is not particularly limited, but if the amount of about 10 to 20% by weight based on the total weight of the total fiber, because the absorption rate of the non-depressed surface portion 12 is low to about 3 seconds or less When the user wears, the user may maintain a dry touch, and further, the wearing feeling may be further improved.

In addition, the hydrophobic treated nonwoven fabric sheet is prepared by hydrophobic surface treatment of a nonwoven fabric sheet surface obtained by bonding a web made of fibers with a hydrophobic emulsion known in the art.

Such nonwoven sheets have various kinds of sheets according to a method of bonding a web made of fibers. For example, there is a thermal bonding non-woven fabric, a spunbond nonwoven fabric, a spun-lace nonwoven fabric, a through-air bonding nonwoven fabric, and the like, but are not limited thereto. Among these, when aeration bonding nonwoven fabric is used, the wearer's skin friction can be minimized. According to an example of the present invention, when using a hydrophobic breathable bonded nonwoven fabric obtained through the air-bonded web (web) made of hydrophobic fibers, while maintaining the smoothing while minimizing the skin friction of the wearer can be further improved comfort .

Examples of the fibers include natural fibers such as cotton, silk, wool, hemp, regenerated fibers such as rayon, and synthetic fibers such as polyester, polyethylene, polypropylene, and polyethylene terephthalate. Can be used in combination. Among these, polyethylene, polypropylene, etc. are preferable.

In addition, the thickness (fineness) of the fiber is not particularly limited, but when the thickness of the fiber is about 1.0 to 3 denier (denier, d), the skin irritation is minimized when wearing the absorbent article to minimize the occurrence of skin side effects It is possible to improve the instantaneous absorption function.

In addition, the length of the fiber is not particularly limited, but if it is about 30 to 58 mm, while the workability of the carding process during the manufacturing of the nonwoven fabric can be improved, the uniformity of the surface of the nonwoven fabric is improved to minimize skin friction of the wearer. can do.

The basis weight of the nonwoven fabric containing such fibers is not particularly limited, but when it is about 20 to 50 g / m 2, it is possible to soften the surface feel while improving absorption, thereby minimizing the occurrence of skin side effects.

(2) Absorption transport layer

The female disposable absorbent article 1 according to the present invention includes an absorbent transfer layer 40 between the surface sheet 10 and the absorbent body 20 as shown in FIG. 3. The absorption transfer layer 40 transfers the body fluid absorbed through the surface sheet 10 to the absorber 20 at a high speed.

The absorption transfer layer 40 is a liquid permeable sheet, and includes a hydrophilic nonwoven sheet for rapidly absorbing body fluid from the surface sheet 10 and transferring it to the absorbent body 20.

In this case, as illustrated in FIG. 3, the absorption transfer layer 40 may have a second depression 41 corresponding to the shape of the depression 11 of the surface sheet 10 described above. By the formation of the second depression, the surface sheet and the absorbent transfer layer become close, which makes the surface sheet more bulky to increase the cushioning feeling, and thus the smooth surface feel can be further improved.

Examples of the hydrophilic nonwoven sheet include a nonwoven sheet obtained by mechanically, chemically and thermally bonding (bonding) a web made of hydrophilic fibers; Nonwoven sheets obtained by mechanically, chemically, and thermally bonding a web of hydrophilic fibers and hydrophobic fibers; Or a hydrophilic nonwoven sheet, but is not limited thereto. As an example of the present invention, a nonwoven fabric sheet (basic weight: about 20 to 25 gsm) obtained by bonding a web made of polyethylene / polypropylene composite fibers (fineness: about 2 denier) may be used as the hydrophilic nonwoven sheet.

Such nonwoven sheets have various types of nonwoven sheets, depending on how the web of fibers is bonded. For example, there is a thermal bonding non-woven fabric, a spunbond nonwoven fabric, a spun-lace nonwoven fabric, a through-air bonding nonwoven fabric, and the like, but are not limited thereto.

The thickness (fineness) of the fiber is not particularly limited, but when the thickness of the fiber is about 1.5 to 2.0 denier, the body fluid absorbed by the surface sheet can be quickly absorbed and delivered to the absorber.

In addition, the length of the fiber is not particularly limited, but if it is about 30 to 58 mm, the workability of the carding (carding) process when manufacturing the nonwoven fabric can be improved.

The basis weight of the nonwoven fabric containing such fibers is not particularly limited, but when it is about 18 to 30 g / m 2, it may exhibit a good absorption rate of 3 seconds or less.

(3) The absorber

In the present invention, the absorbent body 20 rapidly absorbs and retains (stores) the body fluid that has passed through the surface sheet 10 or the absorbent transfer layer 40, and the surface sheet 10 and the back sheet 30 below. Located between). The size and shape of the absorber 20 are not particularly limited, and may be modified to meet absorbent capacity requirements and provide comfort to the wearer.

The absorbent body 20 may include an absorbent core (not shown), preferably an absorbent core, and a core warp sheet (not shown).

The absorbent core 20 functions to absorb the body fluid that has passed through the surface sheet 10 or the absorption transfer layer 40 at a high speed, and retain the body fluid to prevent the absorbed body fluid from contacting the skin again. . The absorbent core may comprise an absorbent core forming material known in the art and may comprise, for example, a liquid absorbent material.

Specifically, the absorbent core may include a fluff pulp and a super absorbent polymer. The fluff pulp is obtained by pulverizing a fibrous web or a wood pulp on a sheet. The superabsorbent resin is not particularly limited as long as it is an absorbent resin used for absorbing body fluids in the art, and examples thereof include resins polymerized using polyacrylic acid as an essential material.

The amount of fluffy pulp may be about 30 to 50% by weight based on the total weight of the absorbent core, and the superabsorbent resin may be about 10 to 40% by weight based on the total weight of the absorbent core.

The core wrap sheet supports the absorbent core and prevents the body fluids absorbed in the absorbent core from leaking out, and prevents the absorbent core from being broken or bundled.

Such a core wrap sheet may be laminated to the top and / or bottom of the absorbent core described above, or it may be bonded to the absorbent core in the form of wrapping the absorbent core. Preferably, when the core wrap sheet is laminated to both the top and bottom of the absorbent core, or adhered in a wraparound manner, the absorbent core can be supported more firmly and the leakage of body fluids more effectively .

The core wrap sheet may be a tissue or a non-woven fabric having a hydrophilic function. The manner of imparting a hydrophilic function to the nonwoven fabric is appropriately selected depending on the kind of the nonwoven fabric. For example, the thermally bonded or vented bonded nonwoven fabric may have a hydrophilic function by being produced using a fiber treated with a surfactant known in the art, and in the case of a spunbonded nonwoven fabric, a raw material (e.g., polypropylene or Polyethylene) is spun at a high temperature to produce a nonwoven fabric, and then the nonwoven fabric itself is treated with a surfactant known in the art to have a hydrophilic function.

Examples of the nonwoven fabric include spunbonded nonwoven fabric, thermally bonded nonwoven fabric, meltblown nonwoven fabric, spunbond-meltblown-spunbond nonwoven fabric, and examples of the nonwoven fabric include polyester, polyethylene, . Preferably, the tissue is subjected to wet strength treatment.

The basis weight of the nonwoven fabric used in the core wrap sheet is not particularly limited, but when adjusted in the range of about 10 to 15 g / m 2 according to the type of the nonwoven fabric, the core wrap sheet firmly supports the absorbent core and more effectively prevents leakage of body fluids. can do. For example, the spunbond nonwoven or meltblown nonwovens preferably have a basis weight in the range of about 10 to 15 g / m 2, and the thermally bonded nonwovens preferably have a basis weight of about 15 to 18 g / m 2.

(4) a liquid impermeable back sheet

In the present invention, the back sheet 30 is a liquid impermeable sheet that prevents leakage of body fluid absorbed and contained in the absorber 20 to prevent contamination of the wearer's clothing or the surrounding environment.

The back sheet 30 is not particularly limited as long as it is known in the art, and examples thereof include a non-breathable or breathable film, a nonwoven fabric, and the like. Specific examples include spunbond-meltblown-spunbond (SMS) or spunbond-meltblown-meltblown-spunbond (SMMS), or film / nonwoven laminate.

<Method of manufacturing disposable absorbent article>

The above-mentioned disposable absorbent article may be manufactured through various methods, for example, but not limited thereto.

According to one embodiment of the present invention, a disposable absorbent article comprises: delivering a hydrophilic emulsion to an emboss surface of the embossing roller through a hydrophilic emulsion delivery roller which rotates in engagement with the embossing roller; Passing a hydrophobic nonwoven sheet between the rotating embossing roller and the rubber roller to form a plurality of depressions in the hydrophobic nonwoven sheet; Including the step of applying a hydrophilic emulsion delivered to the embossed surface of the embossing roller to the formed depression, the depression forming step and the hydrophilic emulsion coating step may be prepared by a manufacturing method performed at the same time or continuously. .

In addition, according to another embodiment of the present invention, the disposable absorbent article comprises the steps of transferring the hydrophilic emulsion to the emboss surface of the embossing roller through a hydrophilic emulsion delivery roller that rotates in engagement with the embossing roller; Laminating the hydrophobic nonwoven sheet and the hydrophilic nonwoven sheet to form a laminated sheet; Forming a plurality of depressions in the hydrophobic nonwoven sheet by passing the laminated sheet between the rotating embossing roller and the rubber roller to be engaged with each other; And applying a hydrophilic emulsion delivered to the emboss surface of the embossing roller to the formed depression, wherein the depression forming step and the application of the hydrophilic emulsion may be performed simultaneously or continuously. have.

Referring to Figures 5 and 6, it will be described in more detail by dividing the disposable absorbent article manufacturing method of the present invention in each step as follows.

First, the hydrophilic emulsion 100 is transferred to the surface of the embossing roller 301 of the embossing roller through the hydrophilic emulsion transfer roller 200 which rotates in engagement with the embossing roller 300 (hereinafter, referred to as 'step S101').

In the present invention, the coating liquid delivery roller 200 is located in the upper portion of the chamber containing the hydrophilic emulsion 100, as shown in Figure 5, the surface of the roller is impregnated in the hydrophilic emulsion 100. Therefore, the surface of the hydrophilic emulsion transfer roller 200 which rotates in engagement with the embossing roller 300 is buried with the hydrophilic emulsion 100, the hydrophilic emulsion transfer roller 200 is in contact with the embossing roller 300, the hydrophilic emulsion The hydrophilic emulsion 100, which was buried on the surface of the delivery roller 200, is transferred to the surface of the emboss 301 of the embossing roller.

The hydrophilic emulsion transfer roller 200 is a roller having a flat outer circumferential surface, and the material of the outer circumferential surface is rubber, but is not limited thereto.

The linear velocity of the hydrophilic emulsion conveying roller is not particularly limited, and is preferably adjusted in consideration of the rotational speed of the embossing roller, the feed rate of the hydrophobic nonwoven sheet, the viscosity of the hydrophilic emulsion, and the like. For example, the linear velocity of the hydrophilic emulsion delivery roller may be about 100 to 350 m / min.

The hydrophilic emulsion 100 is not limited as long as it is a general one used in the art. The hydrophilic emulsion 100 may be applied to the recess 11 formed in the hydrophobic nonwoven sheet 10 to impart hydrophilicity.

In addition, the embossing roller 300 is a roller having a plurality of emboss (301) of various forms arranged on the outer circumferential surface, while one side is engaged with the hydrophilic emulsion transfer roller 200 to rotate, the other side is a rubber roller ( Is rotating in engagement with 400). The embossing roller 300 may form a plurality of recesses 11 in the hydrophobic nonwoven sheet 10.

The shape of the emboss 301 is not particularly limited, and there are, for example, continuous linear, circular, polygonal, and the like, and is appropriately selected according to the shape of the depression.

In addition, the size of the emboss 301 is not particularly limited, it is preferable to select appropriately according to the size of the depression to be formed, the elasticity of the hydrophobic nonwoven sheet. For example, in order to form a continuous linear depression shown in FIG. 4 (a), an embossing roller having a continuous linear emboss may be used, wherein an emboss having an appropriate width may be used according to the width of the depression. have. For example, when the width of the depression is about 0.5 to 3 mm, preferably about 0.8 to 2.5 mm, an embossing roller with a linear emboss having a width of 0.5 to 3.2 mm, preferably about 0.8 to 2.7 mm can be used. In addition, as shown in FIG. 4 (b), when it is desired to form a circular depression having a diameter of about 0.5 to 2 mm, an embossing roller having a circular emboss having a diameter of about 0.5 to 2.2 mm may be used. In addition, as shown in FIG. 4 (c), when the rectangular depression having a diagonal length of about 1 to 3 mm is to be formed, an embossing roller having a rectangular emboss having a diagonal length of about 1 to 3 mm is formed. Can be used.

In addition, the height of the embossing 301 is not particularly limited, and it is preferable to select appropriately according to the depth of the recessed portion to be formed and the elasticity of the hydrophobic nonwoven sheet. For example, when a depression having a depth of about 1 to 2 mm is to be formed, an embossing roller having an embossment having a height of 1.0 to 2.2 mm may be used.

In addition, the separation distance between the one emboss and the other emboss is not particularly limited, it is preferable to select an appropriate embossing roller in consideration of the separation distance between the depressions to be formed. For example, when it is desired to form a depression having a separation distance of about 1.5 to 3.0 mm, embossing rollers having embosses spaced about 1.5 to 3.2 mm may be used.

On the surface of the emboss 301, the embossing roller 300 meshes with the hydrophilic emulsion conveying roller 200 and rotates to transfer the hydrophilic emulsion buried on the surface of the hydrophilic emulsion conveying roller 200.

The linear velocity of the embossing roller is not particularly limited, and it is appropriate to adjust the linear velocity of the hydrophilic emulsion transfer roller, the feed rate of the sheet, and the like. For example, the linear velocity of the embossing roller may be about 100 to 350 m / min.

Thereafter, a plurality of recesses 11 are formed on one surface of the hydrophobic nonwoven sheet by passing the hydrophobic nonwoven sheet 10 between the embossing roller 300 and the rubber roller 400 which rotate and mesh with each other (hereinafter, 'step S102'). ). However, the step S102 is performed simultaneously or continuously with the following step S103.

As shown in FIG. 6, the embossing roller 300 rotates while one side is engaged with the hydrophilic emulsion transfer roller 200 and the other side is engaged with the rubber roller 400. When the hydrophobic nonwoven fabric sheet 10 is supplied between the embossing roller 300 and the rubber roller 400, the pressure of the embossing roller and the pressure of the rubber roller are in a portion where the emboss of the embossing roller 300 and the outer circumferential surface of the rubber roller 400 meet. As a portion of the hydrophobic nonwoven sheet 10 is pressed while being elastically recessed, a plurality of recesses 11 are formed on one surface of the hydrophobic nonwoven sheet 10. At this time, the depression 11 is formed, the shape, size, depth, the separation distance between the depressions is adjusted according to the embossing 301 of the embossing roller as described above, the shape, size, depth, between the depressions Depending on the separation distance, the bulkiness of the surface sheet can be adjusted.

The linear pressure applied to the hydrophobic nonwoven sheet by the embossing roller is not particularly limited, and it is appropriate to adjust in consideration of the elasticity and thickness of the hydrophobic nonwoven sheet. For example, the linear pressure may be about 20 to 90 N / mm.

Subsequently, in step S102, the hydrophilic emulsion 100 transferred to the surface of the emboss 301 of the embossing roller 300 is formed through the hydrophilic emulsion delivery roller 200 which rotates in engagement with the embossing roller 300 in step S101. It is applied to the recessed portion 11 (hereinafter referred to as "step S103"). However, the step S103 is performed simultaneously or continuously with the above-described step S102, preferably is performed simultaneously.

Specifically, as shown in FIG. 6, when the hydrophobic nonwoven fabric sheet 10 is supplied between the embossing roller 300 and the rubber roller 400 which rotate in engagement with each other, the emboss and the rubber roller 400 of the embossing roller 300 are provided. The emboss 301 of the embossing roller is recessed while the part of the hydrophobic nonwoven sheet 10 is pressed in a portion where the outer circumferential surface of the abutment is pressed, wherein the surface of the emboss 301 of the embossing roller by the hydrophilic emulsion transfer roller 200 in step S101. The hydrophilized recessed part 11 is formed by apply | coating to the site | part to which the hydrophilic emulsion 100 buried in it is recessed.

On the other hand, as shown in Figure 6, between the embossed roller 300 and the rubber roller 400 rotated in engagement with each other, instead of the hydrophobic nonwoven sheet 10, a hydrophobic nonwoven sheet and a hydrophilic nonwoven sheet laminated laminated sheet 50 Can be passed. When the laminated sheet 50 is supplied between the embossing roller 300 and the rubber roller 400 rotated in engagement with each other, while forming a plurality of depressions 11 in the hydrophobic nonwoven sheet 10 of the laminated sheet, A plurality of hydrophilized recesses 11 may be formed on the hydrophobic nonwoven sheet 10 by applying a hydrophilic emulsion 100 on the surface of the embossing 301 of the embossing roller to the recesses 11 to be formed. . In this case, the second recess 41 may be formed in the hydrophilic nonwoven sheet 40 laminated on the hydrophobic nonwoven sheet to correspond to the shape of the recess 11 formed in the hydrophobic nonwoven sheet.

The method of laminating the hydrophobic nonwoven sheet and the hydrophilic nonwoven sheet is not particularly limited, and for example, the hydrophobic nonwoven sheet and the hydrophilic nonwoven sheet may be physically, chemically and thermally bonded.

The manufacturing method according to the invention may optionally further comprise the step of drying the applied hydrophilic emulsion (100) (see Figure 6).

It is preferable to adjust the said drying temperature according to the kind and application amount of a hydrophilic emulsion. For example, the drying temperature may be about 90 to 140 ℃.

By performing each step as described above, the surface sheet 10 of the disposable absorbent article including a hydrophobic nonwoven sheet having a plurality of hydrophilized depressions 11 is formed. Subsequently, under the manufactured surface sheet 10, the absorbers 20 and the back sheet 30 prepared in accordance with methods known in the art are sequentially laminated and bonded, thereby finally manufacturing a disposable absorbent article. . Optionally, an absorption transfer layer 40 may be interposed between the surface sheet 10 and the absorbent body 20. In this case, a second recessed portion 41 may be formed in the absorption transfer layer 40 to correspond to the shape of the recessed portion 11 of the surface sheet 10.

On the other hand, the present invention provides a hydrophobic nonwoven sheet in which a plurality of hydrophilized depressions are arranged.

Although the present invention has been described with reference to the drawings, it is merely exemplary, and it is common in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone with knowledge can easily know. In addition, all details may be replaced by other technically equivalent elements.

1: disposable absorbent article,
10: surface sheet, 11: depression,
20: absorber, 30: back sheet,
40: absorption transfer layer, 41: second depression,
50: laminated sheet,
100: hydrophilic emulsion, 200: hydrophilic emulsion delivery roller,
300: embossing roller, 301: emboss,
400: rubber roller, 500: dryer

Claims

A disposable absorbent article having a surface sheet comprising a hydrophobic nonwoven sheet having a plurality of hydrophilized depressions arranged thereon.

The disposable absorbent article of claim 1 wherein the hydrophilized depression is surface treated with a hydrophilic emulsion.

The disposable absorbent article of claim 1 wherein the area ratio of the depressions is 20 to 50% based on the total area of the surface sheet.

The disposable absorbent article of claim 1 wherein the depth of the depression is between 1 and 1.5 mm.

The disposable absorbent article as set forth in claim 1, wherein the depression has a size of 0.5 to 3 mm.

The disposable absorbent article of claim 1 wherein the hydrophobic nonwoven sheet is a nonwoven sheet containing hydrophobic fibers.

The disposable absorbent article of claim 6, wherein the nonwoven sheet further contains hydrophilic fibers, wherein the content of the hydrophilic fibers is 10 to 20 wt% based on the total weight of the total fibers.

The disposable absorbent article of claim 1 wherein the hydrophobic nonwoven sheet is a hydrophobic surface treated nonwoven sheet.

2. The disposable absorbent article of claim 1 wherein an absorbent transfer layer comprising a hydrophilic nonwoven sheet is positioned below the hydrophobic surface sheet.

10. The disposable absorbent article as set forth in claim 9, wherein said hydrophilic nonwoven sheet is formed with a second depression corresponding to the shape of the depression of said hydrophobic nonwoven sheet.

Delivering a hydrophilic emulsion to the emboss surface of the embossing roller through a hydrophilic emulsion conveying roller which rotates in engagement with the embossing roller;
Passing a hydrophobic nonwoven sheet between the rotating embossing roller and the rubber roller to form a plurality of depressions in the hydrophobic nonwoven sheet;
Applying a hydrophilic emulsion delivered to the emboss surface of the embossing roller to the formed depression
, &Lt; / RTI &
The method of claim 1, wherein the step of forming the recess and the step of applying the hydrophilic emulsion are performed simultaneously or continuously.

Delivering a hydrophilic emulsion to the emboss surface of the embossing roller through a hydrophilic emulsion conveying roller which rotates in engagement with the embossing roller;
Laminating the hydrophobic nonwoven sheet and the hydrophilic nonwoven sheet to form a laminated sheet;
Passing the laminated sheet between the rotating embossing roller and the rubber roller to form a plurality of depressions in the hydrophobic nonwoven sheet; And
Applying a hydrophilic emulsion delivered to the emboss surface of the embossing roller to the formed depression
, &Lt; / RTI &
The method of claim 1, wherein the step of forming the recess and the step of applying the hydrophilic emulsion are performed simultaneously or continuously.

The method according to claim 11 or 12, wherein the hydrophilic emulsion is polyethylene glycol ester, polyoxyethylene alkyl sulfate, alkyl phosphate ester potassium salt, polyoxyethylene alkyl ester, alkyl sulfonate sodium salt, polyester, polyester modified silicone, A method for producing a disposable absorbent article, characterized in that selected from the group consisting of sulfosuccinate, polyoxyethylene amide ether, and polyglycerol polyester.

13. The method of claim 11 or 12, further comprising drying the applied hydrophilic emulsion.

A hydrophobic nonwoven sheet in which a plurality of hydrophilized depressions are arranged.