JP6375574B2 - Light incontinence pad - Google Patents

Description

  The present invention relates to an absorbent article.

Absorbent articles such as light incontinence pads have a two-layer structure only on the crotch absorbent part so that they can be absorbed quickly without leaking a certain amount of liquid such as urine that is discharged at a certain amount at a time. There are known methods / effects for eliminating gaps and improving liquid absorption / diffusion.
Further, from the viewpoint of fitability and leakage prevention (diffusion), a pair of left and right channel embossing is applied from the top sheet to the absorber so as to facilitate the deformation of the shape and as a means for inducing forward and backward liquid diffusion.

  In the absorbent articles of Patent Document 1 and Patent Document 2, the absorption performance is improved by setting the density of the lower layer> the upper layer in the two-layer absorber. In the absorbent article of Patent Literature 3, in the two-layer absorber, the lower-layer absorber is made small, and the upper-layer absorber is pushed up to form a convex structure upward to prevent leakage. In the absorbent article of Patent Document 4, the retention of liquid on the surface is reduced by so-called channel embossing in which the top sheet and the absorbent body are embossed. In the absorbent article of patent document 5, the sheet-like absorber which has a leak-proof wall which has the spontaneous three-dimensional function in which the uneven | corrugated level | step difference after water absorption becomes large by water absorption and swelling is obtained.

JP 62-27945 A Japanese Patent Laid-Open No. 2004-121382 JP 2002-238948 A JP-A-1996-71105 JP 2003-33381 A

  However, in the absorbent article of the above-mentioned patent document, there is a demand for an absorbent article that has a small effect of side leakage with respect to a liquid that leaks in large quantities at a time, and that has both absorption performance and fit.

  Therefore, in order to solve the above problems, an object of the present invention is to provide an absorbent article that has a large effect of side leakage even when a large amount of liquid leaks at a time, and has both absorption performance and fit.

  In order to achieve such an object, (1) the absorbent article of the present invention includes a liquid-permeable top sheet on the front side, a liquid-impermeable back sheet on the back side, the top sheet, and the back sheet. The absorber has a front area, a urine area, and a rear area, and is provided in the urine area of the absorber, and is raised in a pair of left and right in the width direction. It has a collar part, and the collar part is formed with a higher density than the peripheral region, and has a convex shape or a concave shape in a straight line or in the product width direction in a plan view.

(2) In said (1), the said collar part has a top part and a base part, the top surface width | variety of the said top part is 3-10 mm, and height is 2-10 mm with respect to a basal plane.
(3) In said (1) or (2), the said collar part has a side wall part, and the inclination-angle of the said side wall part is 15 degree | times or more.
(4) In the above (1) to (3), the urination area of the top sheet and the absorber is partially integrated by channel embossing or an adhesive.

(5) Said (1) thru | or (4) WHEREIN: It further has a wrinkle of the shape which is convex in the width direction in the front area or / and the rear area of the said absorber in the shape of a straight line or a product longitudinal direction, or is convex outside.
(6) In the above (1) to (5), it further includes at least a pair of three-dimensional gathers that at least partially stand up outside in the width direction from the pair of left and right collars.

  According to the present invention, even when a large amount of liquid leaks at a time, it is possible to provide an absorbent article having a large effect of side leakage and having both absorption performance and fit.

It is a top view of an absorptive article concerning an embodiment of the present invention. It is sectional drawing of the absorbent article which concerns on embodiment of this invention, Comprising: It is sectional drawing in the A-A 'line | wire of FIG. It is a top view of the absorber of the absorptive article concerning the embodiment of the present invention. 4 is a cross-sectional view taken along the line B-B 'of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. The same number is attached | subjected to the same element through the whole description of embodiment. In the embodiment, “front”, “rear”, “left”, and “right” respectively indicate directions viewed from the user side wearing the absorbent article.

  Examples of the absorbent article according to the embodiment of the present invention include a light incontinence pad, a panty liner, a paper diaper, a paper diaper liner, and a sanitary napkin, but are not limited thereto, and other absorbent articles. It may be.

  1 is a plan view of an absorbent article according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the absorbent article according to the embodiment of the present invention, taken along the line AA ′ of FIG. It is sectional drawing. As shown in FIG. 1 and FIG. 2, the absorbent article 1 includes a liquid-permeable top sheet 200 disposed on the skin contact surface side, and a liquid disposed on the back surface facing the top sheet 200. An impermeable back sheet 300 and an absorbent body 100 disposed between the top sheet 200 and the back sheet 300 are provided. Thereby, the absorber 100 has a structure sandwiched between the top sheet 200 and the back sheet 300.

The base material of the top sheet 200 of the present embodiment only needs to have liquid permeability so that liquids such as blood and body fluid move to the absorber 100. For example, a thermal bond nonwoven fabric typified by an air-through nonwoven fabric. Formed from materials such as non-woven fabrics, spunbond nonwoven fabrics, composite nonwoven fabrics laminated with thermal bonds / spun bonds, open films such as open polyethylene films, foamed films such as polyethylene foam and urethane foam, or composite sheets laminated with these. Is done. Of these, an air-through nonwoven fabric is preferable from the viewpoint of preventing the return of urine and the like. Moreover, in order to improve liquid permeability, it is preferable to emboss or perforate the top sheet 200. The processing method can perform a well-known method without a restriction | limiting. In order to reduce irritation to the skin, the top sheet 200 preferably contains a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizing agent, and the like. Furthermore, from the viewpoints of strength and workability, the basis weight of the top sheet 200 is preferably 10 g / m ² or more and 50 g / m ² or less, more preferably 18 g / m ² or more.

  On the skin contact surface side of the top sheet 200, it is preferable that the three-dimensional gathers 210 are provided along the longitudinal direction from the longitudinal front portion (on the paper surface) to the longitudinal rear portion (the paper surface) on both side edges in the longitudinal direction. The three-dimensional gather 210 is provided with an elastic member 212 for three-dimensional gathers such as rubber thread along the longitudinal direction in the three-dimensional gather sheet 211, so that it has uprightness and can be deformed to expand and contract according to the body shape of the user. .

  In addition, on the skin contact surface side of the top sheet 200, a barrier sheet (not shown) is provided from the both lateral edges of the absorbent article 1 to the inner side in the width direction in order to prevent side leakage of the absorbent article 1 more reliably. ) Is also preferable. The base material of the barrier sheet is preferably liquid-impermeable, for example, a nonwoven film such as a thermal bond nonwoven fabric, a spunbond nonwoven fabric, a composite nonwoven fabric laminated with thermal bond / spunbond, a foamed film such as polyethylene foam, urethane foam, etc. Alternatively, it is formed from a material such as a composite sheet in which these are laminated. Furthermore, it is also preferable to provide wing-shaped flaps (not shown) that protrude outward in the width direction from both side edges of the absorbent article 1. The wing-shaped flap can be formed, for example, by stacking the back sheet 300 and a nonwoven fabric.

The absorber 100 contains flap pulp and a superabsorbent resin (superabsorbent polymer). The base material of the absorbent body 100 is not particularly limited as long as it is generally used for absorbent articles such as sanitary napkins, diapers, and urine pads. For example, fluff pulp, cotton, rayon, acetate, tissue, absorbent paper It is formed from a material such as a hydrophilic nonwoven fabric. Among these, fluff pulp is preferable from the viewpoint of absorbability. Examples of such fluff pulp include wood pulp and non-wood pulp such as synthetic fiber and polymer fiber, which are defibrated into cotton. Moreover, so as not to impair the absorption performance and feel, it is preferable that the basis weight of the base material of the absorber 100 and 300 g / ^{m 2} or more 600 g / ^{m 2} or less.

The superabsorbent polymer (SAP) of the absorbent body 100 is not particularly limited as long as it can absorb body fluid and prevent backflow. For example, sodium polyacrylate, polyaspartic acid, (starch-acrylic acid) It is formed from materials such as a graft copolymer, an acrylic acid-vinyl alcohol) copolymer, an (isobutylene-maleic anhydride) copolymer and a saponified product thereof. Among these, sodium polyacrylate is preferable from the viewpoint of the amount of absorption per weight. Moreover, so as not to impair the absorption performance and feel, the basis weight of the superabsorbent polymer of the absorbent body 100 is preferably set to 100 g / ^{m 2} or more 500 g / ^{m 2} or less.

  The base material and superabsorbent polymer of the absorbent body 100 are preferably formed by mixing superabsorbent polymer particles in the base material. In order to prevent leakage of the superabsorbent polymer particles and to stabilize the shape of the absorber 100, it is preferable to wrap the absorber 100 in a carrier sheet (not shown). The carrier sheet includes an upper carrier sheet 710 on the top sheet 200 side (upper part) of the absorbent body 100. As a base material of a carrier sheet, what is necessary is just to have hydrophilicity, and hydrophilic nonwoven fabrics, such as tissue, an absorbent paper, an airlaid nonwoven fabric, can be mention | raise | lifted. In the case where a plurality of carrier sheets are provided, the base material of the carrier sheet may be the same or different.

  The shape of the absorbent body 100 is not particularly limited as long as it is generally used for absorbent articles such as sanitary napkins, diapers, and urine pads, and examples thereof include a rectangular shape, an hourglass shape, and an I-shape. Can do. Furthermore, it is preferable to emboss the surface of the absorbent body 100 because the diffusion of body fluid is controlled and the absorbent body 100 is easily deformed according to the body shape of the user.

The base material of the back sheet 300 of the present embodiment may be any material having liquid impermeability so that the body fluid retained by the absorbent body 100 does not leak into the undergarment, and may be a nonwoven fabric, a resin film, or a laminate of these. Formed from a material such as a composite sheet.
Such a nonwoven fabric is not particularly limited in its production method, and examples thereof include spunbond and meltblown nonwoven fabrics, or composite nonwoven fabrics in which spunbond / meltblown, spunbond / meltblown / spunbond are laminated, and composite materials thereof. Examples of the resin film include polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene. It is preferable that the back sheet 300 is provided with an adhesive 610 that adheres to underwear and the like, and a release paper 600 is provided on the outer side thereof.

From the standpoint of strength and workability, the basis weight of the back sheet 300 is preferably about 15 g / m ² or more and 40 g / m ² or less, and more preferably 18 g / m ² or more. Moreover, in order to prevent stuffiness at the time of wearing, it is preferable that the back sheet 300 has air permeability. In order to provide air permeability, for example, a filler is blended in the resin film of the base material, and the back sheet 300 is embossed. An example of the filler is calcium carbonate, and the processing method thereof can be a known method without limitation.

3 is a plan view of the absorbent body of the absorbent article according to the embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along the line BB ′ of FIG. As shown in FIGS. 1-4, the absorber 100 has a front area, a urination area, and a rear area. In the crotch urination region of the absorbent body 100, a pair of left and right raised heel portions 120 are formed extending in the longitudinal direction.
As shown in FIG. 4, the flange 120 has a convex shape on the inner side in the product width direction in plan view, and the length in the longitudinal direction is longer than the amplitude in the width direction. The flange portion 120 may be concave on the inner side of the product width (convex shape on the outer side) or may be linear. The flange 120 includes a top 121, a side wall 122, and a base 123, and the density is higher than that of the base (peripheral region) other than the flange 120 by pressing or the like.

The top surface width A of the top 121 is preferably 3 to 10 mm so as not to buckle. As for the height B of the collar part densified by the press etc., 2-10 mm is preferable with respect to a basal plane. If it is 2 mm or less, the effect as the heel portion 120 is thin, and if it is 10 mm or more, the fit is worse than the diffusion effect.
The side wall portion 122 of the flange portion 120 is inclined so as not to buckle, and the inclination angle θ is preferably 15 degrees or more. If it is 15 degrees or less, the buttocks will be easily deformed.
Furthermore, in order to prevent front and rear leakage, the flange portions 130 and 140 are provided in the width direction of the front region and the rear region of the absorber. The collar portions 130 and 140 have a linear shape or a convex shape on the inner side in the product longitudinal direction or a convex shape on the outer side.

  The relationship between the heel part 120 and the three-dimensional gather 210 will be described. The three-dimensional gather 210 is provided such that at least a part thereof stands up outside the pair of left and right heel parts 120 in the width direction. Lateral leakage can be further prevented by the collar 120 and the three-dimensional gather 210.

  The urination area of the top sheet 200 and the absorbent body 100 is partially integrated by channel embossing or an adhesive. In FIG. 2, the urination area of the top sheet 200 and the absorber 100 is integrated by channel embossing 50e and 50f described later. A gap is formed between the top sheet 200 and the absorbent body 100 due to the heel portion, so that the gap is reduced by partially integrating the top sheet 200 and the absorbent body in contact with the urination area by embossing or the like. can do.

  As shown in FIGS. 1 to 3, a pair of first channel embosses 50e and 50f that are curved inward in the width direction provided at the front portion (upper side of the paper surface) of the channel embossing, and the rear in the longitudinal direction urination region A pair of second channel embosses 50a and 50b that are curved outward in the width direction provided on the portion (lower side of the paper surface), and a substantially U-shape that protrudes in the longitudinal rear portion provided on the inner side of the second channel embosses 50a and 50b. By forming the third channel embossing 50d having a shape and a pair of fourth channel embossing 50c and 50g, which are provided at both ends in the longitudinal direction and curved outward in the longitudinal direction, to separate the body fluid from the absorbent body 100 as a whole. Since the superabsorbent polymer retains the body fluid due to the diffusion induction, the decrease in the absorption rate and the liquid return amount can be suppressed even with a large amount of the body fluid.

  The channel embossing can be formed by, for example, a heat embossing method, an ultrasonic embossing method, or a high frequency embossing method. In the case of the hot embossing method, the top sheet 200 and the absorber 100 are sandwiched between an embossing roll having a convex shape corresponding to the channel embossing 50a to 50g and a receiving roll or belt arranged on the peripheral surface of the embossing roll. Channel embosses 50a to 50g are formed by passing the layers laminated in step 1 and heating and pressing them integrally.

  The absorbent article 1 of the present embodiment is obtained by laminating the back sheet 300 on the top sheet 200 and the absorbent body 100 on which the channel embosses 50a to 50g described above are formed, and partially or entirely around the periphery. It is manufactured by fixing with a hot melt adhesive. The type of hot-melt adhesive and the application method are not particularly limited, but there are known methods such as a curtain coating method and a spiral method in which a molten adhesive is applied in a non-contact manner from a nozzle, and a slot method and the like in the contact method. Applicable.

Further, a pulp-containing sheet 500 is provided between the absorber 100 and the back sheet 300. The material of the pulp-containing sheet 500 can be an airlay nonwoven fabric, hydronit nonwoven fabric, or crepe paper mainly composed of wood pulp, and a basis weight of 20 g / m ² or more and 60 g / m ² or less can be used, but preferably 30 g / m ^2. The basis weight is 50 g / m ² or less. By the three-dimensional gather 210, the liquid diffusable sheet 400, and the pulp-containing sheet 500, the absorption rate is excellent, and initial leakage can be prevented.
The hydro-knitted nonwoven fabric is a trade name of Kimberly Clark Inc. in the United States. As disclosed in the specification of US Pat. No. 5,284,703, pulp is used for polypropylene nonwoven fabric without using a binder (adhesive). It is a material that is strongly entangled with water pressure (water jet) and made into a sheet, and has excellent strength and absorbability.

  The following examples further illustrate the present invention. In addition, this invention is not limited to description of a following example, unless the summary is exceeded.

In this example and the reference example , the top sheet 200 is a 20 g / m ² air-through nonwoven fabric and the back sheet 300 is formed by sandwiching each absorber 100 between 20 g / m ² PE films and integrating them. It used for sensory evaluation. In Example 1, the flange 120 is convex inward in the product width direction, the press is “present”, the top width is 8 mm, the length of the flange 120 is 103 mm, the top area is 1665 mm ² , and the height of the flange 120 Was 3 mm and the side wall angle was 26 °. In Reference Example 2, the flange 120 has a concave shape on the inner side in the product width direction, and in Reference Example 3, the flange 120 has a linear shape. The other examples , reference examples and comparative examples are as shown in Table 1.

(Measurement method)
The top surface width A, the length, the interval, the top area, the height B, and the side wall angle of the heel part 120 were measured at various places using Mitani Shoji Co., Ltd. image analysis / image processing software “WinROOF”.
(Extension length)
After 50 ml of 0.9% physiological saline is added to the center of the absorber at 10 ml / second, the liquid diffusion length after 5 minutes is measured from the heel side in the MD (longitudinal direction) and CD (width direction), respectively.

(sensory evaluation)
For 20 panelists, the tactile sensation (feel) and fit (uncomfortable feeling during use such as moles) of Examples , Reference Examples and Comparative Examples , which are absorbent articles 1, were evaluated. Any evaluation of “(a) No discomfort”, “(b) Neither”, or “(c) Discomfort” was selected. "A" when (a) is 16 to 20 people, "O" when (a) is 11 to 15 people, and "△" when (a) is 6 to 10 people. The case where the evaluation of (a) is 0 to 5 is indicated by “x”.

  As shown in Table 1, there is a change in the diffusion condition depending on the shape of the flange 120. However, in the case where there is no press, the diffusion in the MD direction is worse than in the case where there is a press, and the diffusion suppression by the flange 120 is slow in the CD direction. And the liquid introduction effect is low. Moreover, when the height of the buttock 120 is high, the evaluation is low in terms of skin contact. Depending on the press condition, some monitors were concerned about hardness.

Further, in Example 1, the top surface width A of the top portion 121 is wide and the inclination angle of the side wall portion 122 is considerably large, so that it is difficult to buckle, and the height B of the flange portion 120 is low, so that the fit is good. It was. In Reference Example 2, since the top surface width A of the top portion 121 is wide, and the inclination angle of the side wall portion 122 is large, it is difficult to buckle, and the height B of the flange portion 120 is relatively low, so the fit is good. . In Reference Example 3, since the top surface width A of the top portion 121 is wide and the inclination angle of the side wall portion 122 is considerably large, it is difficult to buckle, and the height B of the flange portion 120 is relatively low, so the fit is good. It was.

  Further, in Comparative Examples 1 to 4, the top surface width A of the top portion 121 is generally narrow, the height B of the flange portion 120 is high, and the inclination angle of the side wall portion is relatively small. The nature was also bad.

  According to the absorbent article 1 according to the embodiment of the present invention, since the urination area is wide open between the heel parts 120, even when a large amount of leakage occurs at once, it is easy to diffuse back and forth, and leakage can be prevented. . Further, the dense portion of the flange portion 120 serves as a wall to induce diffusion in the longitudinal direction, thereby preventing side leakage. Furthermore, the densified heel portion hits the buttock portion, and becomes a leak prevention effect and a bend line to fit the crotch portion.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Absorbent article 100 Absorbent body 120 Ridge part 121 Top part 122 Side wall part 123 Base part 200 Top sheet 300 Back sheet

Claims (3)

A liquid-permeable top sheet on the surface side;
A liquid-impermeable back sheet on the back side;
An absorbent body disposed between the top sheet and the back sheet,
The absorber has a front region, a urination region, and a rear region,
A pair of raised left and right first collars provided in the urination area of the absorbent body, and linearly or inward in the longitudinal direction of the product in the width direction of the front area and the rear area of the absorbent body or outside A pair of second flanges in the longitudinal direction that are convex to each other, and the first flange and the second flange are separated from each other,
In the urination area of the top sheet and the absorber,
A pair of first channel embossing curved inward in the width direction provided in the front part of the longitudinal urination area;
A pair of second channel embossing curved outward in the width direction provided in the rear part of the longitudinal urination area;
A substantially U-shaped third channel embossing projecting in the longitudinal rear portion provided inside the second channel embossing;
A pair of fourth channel embosses, which are provided at both ends in the longitudinal direction and are curved outward in the longitudinal direction, are located on the inner side in the width direction with respect to the first flange portion and on the inner side in the longitudinal direction with respect to the second flange portion. Are provided apart from each other,
The first brim portion is formed with a higher density than the peripheral region, and has a convex shape or a concave shape in a linear shape or in the product width direction in a plan view,
The first collar has a top and a base;
The top surface width of the top is 3 mm or more and 8.6 mm or less, and the height is 3 mm or more and 5 mm or less with respect to the basal plane,
The light incontinence pad, wherein the first flange portion has a side wall portion, and the inclination angle of the side wall portion is not less than 15 degrees and not more than 26 degrees.   The light incontinence pad according to claim 1, wherein the top sheet and the urination area of the absorber are partially integrated by channel embossing or an adhesive. And further comprising at least a pair of three-dimensional gathers standing at least partially on the outer side in the width direction from the pair of left and right first collars,
The light incontinence pad according to claim 1 or 2 provided with a pulp content sheet between said absorber and said back sheet .