KR100628399B1 - Absorbent pad with optimally shaped core and outer clearance - Google Patents

Abstract

Each longitudinal both edges of the top sheet, back sheet and absorbent core in a longitudinally long absorbent pad comprising a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent core disposed between the top sheet and the back sheet. The part is formed with a plurality of recesses that face each other in the width direction. The recesses of the top sheet, back sheet and absorbent core are located corresponding to each other. The narrowest width between the two opposing recesses in the width direction of the top sheet is equal to or smaller than the width at the longitudinal center of the absorbent core, and the narrowest width between the two opposing recesses in the width direction of the back sheet is It is equal to or smaller than the width at the longitudinal center of the absorbent core.

Absorption pad, outer clearance, recess

Description

ABSORBENT PAD WITH OPTIMUM SHAPED CORE AND OUTER MARGIN}

1 is a plan view of one embodiment of a sanitary napkin according to the present invention showing a liquid permeable top sheet with an absorbent core shown in dashed lines.

FIG. 2 is a plan view of the liquid impermeable backsheet of the embodiment shown in FIG. 1, characterized by an adhesive strip disposed on the lateral wings. FIG.

3 is a cross sectional view of the embodiment shown in FIG. 1 taken along line 3-3;

FIG. 4 is a cross sectional view of the embodiment shown in FIG. 3 with lateral wings folded over the pant crotch.

Figure 5 is a perspective view of the sanitary napkin shown worn on the panties.

Fig. 6 is a plan view of a liquid permeable top sheet with an absorbent core shown in dashed lines as another embodiment of the sanitary napkin according to the present invention without wings.

<Explanation of symbols for the main parts of the drawings>

10: sanitary napkin

20: top sheet

24: recess

30: absorbent core

34: recess

40: back sheet

44: concave

The present invention relates generally to a personal care absorbent body, and more particularly to an absorbent pad having an absorbent core and an outer margin in an optimal shape.

Sanitary napkins and incontinence pads (hereinafter collectively referred to as "pads") are well known in the personal care and hygiene art. These pads generally consist of a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent core disposed between the top sheet and the back sheet. The liquid permeable top sheet is an absorbent core that is intended to retain menstrual blood or urine, which infiltrates the liquid excreta, while the liquid impermeable back sheet prevents the liquid excretion from permeating the user's clothing.

The absorbent core is intended to retain liquid excretion so that leakage occurs when the absorbent core is exposed and becomes aesthetically and practically unpleasant when the core material containing menstrual blood or urine is exposed to the outside. Each edge portion of the top sheet and the back sheet is adhered to each other to seal the absorbent core between the top sheet and the back sheet to enclose the absorbent core. For this purpose the width, length and total surface area of the top sheet and back sheet should be larger than that of the core. The vicinity of the edges of the top sheet and the back sheet extending beyond the edges of the core and adhering to each other are collectively referred to as "outer margins". The width of this outer margin is constant or variable along the edge of the core.

Some conventional pads further include two flaps formed by the top sheet and the back sheet, each flap extending laterally outwardly from portions adjacent to both edges of the longitudinal center of the core. The pad with flaps has an adhesive portion on the back of each flap. In use such a pad is placed with the back sheet side down on the inner surface of the crotch portion of the user's panties. The flap is then folded onto the outer surface of the panty crotch and the pad is secured to the panty by the adhesive.

A problem that has conventionally existed in the art is that a user's body portion corresponding to the panty crotch portion and directly contacting the panty crotch portion while maintaining the comfort and performing the inherent function of the conventional pad absorbs and retains liquid feces (this specification) Is to match the natural curve of the "contact". The overall contour of the outer clearance described above has been continually modified in the art to find the optimal shape and dimensions that can be folded to fit the user's contacts while retaining all the features of the pad function.

When the conventional pad is inserted between the user's contact portion and the panty in the conventional pad, both ends of the pad in the longitudinal direction are curved upward in a U shape so that the pad conforms to the user's contact portion. Since the width of the pad corresponding to the contact is generally larger than the actual width of the contact of the user, the longitudinal center of the pad is compressed by the force applied from both thighs of the user. Such compression results in undesirable creases and folds in the width of the contacts.

In conventional pads the longitudinal edges of the absorbent core and the outer clearance are generally straight. When the flap present in such a conventional pad is folded onto the outer surface of the panty crotch, the flap folds up to both longitudinal edges of the core because the width of the core is generally larger than the width of the crotch width of the panty. The longitudinally adjacent outer margin is also folded with the flap.

When the pad is worn in this manner, the back sheet portion of the outer clearance portion can be pressed against the panties while both ends of the lengthwise direction of the pad are curved upward in a U shape. This causes the flap to be pulled outward and gradually out of its original position, hindering its inherent ability to secure the pad to the pant crotch.

Further, when worn, both longitudinal ends of the pad are curved upwardly in a U-shape, while the flap and the outer margin folded at the same time as the flap exert a downward force that resists such upward bending force. If the downward force continues, the U-shape of the pad is released, so that the pad does not come into close contact with the user's body, resulting in poor fit and an increase in the possibility of leakage. Furthermore, the longitudinal outer clearance folded at the same time as the flap results in a narrower width in areas other than the longitudinal center of the pad, increasing the chance of overall lateral leakage.

In the case of a conventional pad without a flap, as the outer margin of the pad center is compressed, the longitudinal outer margin adjacent to the outer margin of the center is also folded, so that the problems shown in the conventional pad having the flaps described above appear.

As a modification of the known conventional pad, the core in the longitudinal direction has a core shaped in the form of an hourglass having a narrower width than both ends in the longitudinal direction, and the longitudinal edge portion of the outer margin is straight. . Since the width at the longitudinal center of the core is narrower than the width at both longitudinal ends thereof, it is possible to enhance the wearing feeling by receiving less force applied in the width direction at the central portion of the core. However, since the outer margin at the center of such a pad is also folded with the outer margin adjacent to the center, the problems as described above are not avoided. Furthermore, in the case of an hourglass core, the reduction in width at its center further increases the possibility of lateral leakage.

The present invention proposes a shaped absorbent pad which satisfies the following objects and provides a simple solution to the problems present in the art with all its advantages.

It is therefore a general object of the present invention to provide an improved sanitary napkin and incontinence pad for personal protection and hygiene.

It is a further object of the present invention to provide an absorbent pad having an overall optimized shape which retains all the advantages of good absorption and retention of liquid excretion and which provides comfort to the user but which conforms to the shape of the contact of the user in an optimal manner. It is.                         

It is another object of the present invention to provide an absorbent pad which can maintain the original physical shape consistently during use by overcoming problems encountered during use of conventional pads.

It is a further object of the present invention to provide an absorbent pad having an improved core shape comprising recesses at both edges adjacent the longitudinal center.

It is still another object of the present invention to provide an absorbent pad in which a plurality of recesses corresponding to the recesses of the absorbent core are formed in the outer margin.

Another object of the present invention is an absorbent pad having laterally extending vanes, the absorbent pad having a plurality of concave portions of the absorbent core formed corresponding to four portions in which both longitudinal edges of the top sheet and the backsheet cross the vanes. To provide.

Another object of the present invention is to have an absorbent core and wings having an improved shape, including four recesses forming a central portion extending laterally outwardly from the longitudinal center of the core, the pad being in the pant crotch of the user. In order to maintain the original function of the wing to constantly fix the to provide an absorbent pad further comprises four recesses corresponding to the four recesses of the core and the outer clearance forming the wing.

Other objects of the present invention will become apparent to those skilled in the relevant art having studied this specification.

One aspect of the present invention includes a liquid permeable top sheet, a liquid impermeable back sheet, an absorbent core disposed between the top sheet and the back sheet, wherein the absorbent pad is long in the longitudinal direction, the top sheet, the back sheet and the absorbent core. Each of the longitudinal side edge portions of the absorber pad is provided with a plurality of recesses opposed to each other in the width direction. The recesses of the top sheet, back sheet and absorbent core are located corresponding to each other. The narrowest width between the two opposing recesses in the width direction of the top sheet is equal to or smaller than the width at the longitudinal center of the absorbent core, and the narrowest width between the two opposing recesses in the width direction of the back sheet is It is equal to or smaller than the width at the longitudinal center of the absorbent core.

Another aspect of the invention includes a liquid permeable top sheet, a liquid impermeable back sheet, an absorbent core disposed between the top sheet and the back sheet, wherein in the longitudinally long absorbent pad, each of the top sheet and the back sheet A plurality of wings extending outwardly opposite to each other in the lateral direction, a plurality of recesses are formed at the position where the plurality of wings and the longitudinal edges meet, the top sheet and the two longitudinal edges of the absorbent core It is an absorption pad in which the some recessed part located in correspondence with the recessed part of a backsheet was formed. The narrowest width between the two opposing recesses in the width direction of the top sheet is equal to or smaller than the width at the longitudinal center of the absorbent core, and the narrowest width between the two opposing recesses in the width direction of the back sheet is It is equal to or smaller than the width at the longitudinal center of the absorbent core.

The edges of the top sheet and the back sheet form outer margins to enclose and seal the edges of the absorbent core. It is preferable that four recesses of a top sheet, a backsheet, and an absorbent core are provided, respectively.

In the absorbent pad of the present invention, the depth of each recess of the top sheet, the back sheet and the absorbent core is 3 mm to 30 mm, or 5 mm to 50 mm. The width between the two opposing recesses in the width direction of the absorbent core is 5 cm to 15 cm, preferably 5 cm to 10 cm. The width of the longitudinal center portion of the absorbent core according to the present invention may be larger than the width between two concave portions that face each other in the width direction of the absorbent core.

The invention is described in more detail below with reference to the drawings.

The present invention is now described with reference to FIG. 1 shows a top view of a sanitary napkin 10 having a top sheet 20, an absorbent core 30 (shown in dashed lines), and a back sheet 40. The top sheet 20 is a liquid permeable layer that allows the menstrual blood to permeate the absorbent core 30. The top sheet 20 is composed of a longitudinal edge portion 21, a widthwise edge portion 22, and a lateral edge portion 23. Each longitudinal edge 21 is connected with a widthwise edge 22 adjacent thereto by a recess 24. The top sheet 20 is further configured with lateral vanes 25, 25 ′. Each wing is formed by corresponding widthwise edges 22 and lateral edges 23. Each wing is intended to be folded along corresponding lines 26, 26 ′ formed by connecting the recesses 24 in the longitudinal direction.

1 shows a part of the absorbent core 30 as the corner of the top sheet 20 is opened and raised. The absorbent core 30 is shown disposed between the liquid permeable top sheet 20 and the liquid impermeable back sheet 40. The absorbent core 30 (as shown by the dashed lines) includes a plurality of recesses 34 and lateral edges 33, 33 ′. The plurality of recesses 34 of the absorbent core 30 correspond to the recesses 24 of the top sheet 20, respectively. The overall size or surface area of the corresponding top sheet 20 and back sheet 40 is larger than the absorbent core 30 as shown in FIG. 1 to provide an outer peripheral margin for sealing. 1 shows the side at the longitudinal center of the absorbent core 30 in a substantially longitudinal alignment with the lines 26, 26 ′ formed by longitudinally connecting the recesses 24 in the top sheet 20. Directional edges 33 and 33 'are shown. Thus, even if the wings 25, 25 ′ are folded against the lateral edges 33, 33 ′ of the absorbent core 30, the longitudinal edges 21 adjacent to the wings do not fold together with the wings.

1 also shows that the widths between the lateral edges 33, 33 ′ of the absorbent core 30 are lines 27, 27 ′ formed by connecting the recesses 24 of the top sheet 20 in the width direction. It is substantially the same as the width formed by. Note that the object of the present invention is achieved when the width between the lateral edges 33, 33 ′ of the absorbent core 30 is substantially equal to or slightly larger than the width of the lines 27, 27 ′. to be.

2 is a plan view of the backsheet 40 characterized by the adhesive strips 47 and 48. The backsheet 40 is structurally composed of a longitudinal edge portion 41, a widthwise edge portion 42, and a lateral edge portion 43. Each longitudinal edge 41 of the backsheet 40 is connected by a recess 44 with a widthwise edge 42 adjacent thereto. The back sheet 40 further includes wings 45 and 45 'in the lateral direction. Each vane 45, 45 ′ of the backsheet 40 is formed by corresponding widthwise edges 42 and lateral edges 43. Each back sheet vane is adapted to be folded along corresponding lines 46, 46 ′ formed by connecting the recesses 44 in the longitudinal direction.

As shown in FIGS. 1 and 2 together, the top sheet 20 and the back sheet 40 are fitted to each other when overlapped with each other in an outer margin extending throughout the outer circumference of the core 30 and the sanitary napkin 10. Have the same shape.

3 is a cross-sectional view of the embodiment shown in FIG. 1 taken along line 3-3. The top sheet 20 is shown in the embodiment as being composed of a lateral vane 25 formed in one recess 24 and ending in the lateral edge 23. Opposite lateral vanes 25 ′ have the same physical relationship as lateral vanes 25. The backsheet 40 is shown according to an embodiment to include a lateral vane 45 formed in the recess 44 and ending with the lateral edge 43. The opposite lateral vanes 45 ′ also have the same physical relationship as the lateral vanes 45.

The absorbent core 30 is disposed between the top sheet 20 and the back sheet 40. 3 is a saw formed by a line formed in the width direction between the recesses 24 of the top sheet 20 in the width between the lateral edges 33 and 33 'at the longitudinal center of the absorbent core 30. It is shown that the width of the sheet 20 is substantially the same. 3 also shows a back sheet 40 formed by a line formed in the width direction between the recesses 44 of the back sheet 40 in the width between the lateral edges 33, 33 ′ of the absorbent core 30. It is also shown that it is substantially equal to the width of.

FIG. 4 is shown in FIG. 3 with lateral vanes 25, 25 ′ of top sheet 20 folded over the crotch of panties 70 and lateral vanes 45, 45 ′ of back sheet 40. Another cross sectional view of an embodiment. While the adhesive strip 47 is attached to the inside of the panties 70 in a conventional manner, the adhesive strip 47 is also attached to the outside of the panties 70. As shown in Fig. 4, the present invention allows the smoothly folded edge to be formed by the reinforcement provided by the wing of the core extending from the lateral edge to the point of alignment with the longitudinal edges of both the top and back sheets. It is.

5 is a perspective view of the sanitary napkin 10 shown in the worn position on the panty 70. Fig. 5 shows a portion in which the wings 25, 25 'start to extend in the width direction from both longitudinal edges of the top sheet 20 and the back sheet 40 (i.e., the recess 24 of the top sheet 20). ) And the recessed portion 34 of the absorbent core 30 correspond to the recessed portion 44 of the backsheet 40. As can be seen from FIG. 5, which shows the wings 25, 25 'attached to the outer surface of the crotch portion, the longitudinal outer margin adjacent to the wing is not folded with the wing.

Those skilled in the art will appreciate that the positioning of the recess 24 of the top sheet 20 and the corresponding recess 44 of the back sheet 40 will vary depending on the shape or size of the blade. In addition, the various sizes of the panties and the user's body size should also be considered.

6 is a plan view of another embodiment of the sanitary napkin according to the present invention, showing a sanitary napkin 110 having a top sheet 120, an absorbent core 130 (shown in dashed lines), and a back sheet 140. Top sheet 120 is a liquid permeable layer that allows menses to seep into absorbent core 130. The top sheet 120 is composed of a longitudinal edge 121 and a lateral edge 123. Each longitudinal edge 121 is connected by a recess 124 with a lateral edge 123 adjacent thereto.

6 shows a part of the absorbent core 130 as the corner of the top sheet 120 is opened and raised. The absorbent core 130 is shown disposed between the liquid permeable top sheet 120 and the liquid impermeable back sheet 140. The absorbent core 130 (as shown by the dashed lines) includes a plurality of recesses 134 and lateral edges 133, 133 ′. The plurality of recesses 134 correspond to the recesses 124 of the top sheet 120, respectively. The overall size or surface area of the corresponding top sheet 120 and back sheet 140 is larger than the absorbent core 130 to provide an outer clearance for sealing. 6 shows the lateral edges 133 of the absorbent core 130 in a substantially longitudinal alignment with the lines 126, 126 ′ formed by longitudinally connecting the recesses 124 in the top sheet 120. 133 '). Thus, even if the lateral edge 123 of the top sheet 120 is folded against the lateral edges 133, 133 ′ of the absorbent core 130, the longitudinal edge portion adjacent to the lateral edge 123 ( 121) do not fold together.

6 also shows that the width between the lateral edges 133, 133 'at the longitudinal center of the absorbent core 130 is a line 127 formed by connecting the recesses 124 of the top sheet 120 in the width direction. , 127 '). As can be seen from the first embodiment with wings above, the width between the lateral edges 133, 133 ′ of the opposing absorbent core 130 is substantially the width of the lines 127, 127 ′. The same or slightly larger object of the present invention is also achieved in the second embodiment without wings.

1-6, the width between the lateral edges 33, 33 ', 133, 133' of the absorbent core 30, 130 is greater than the lines 27, 27 ', 127, 127 ') is substantially equal to or greater than the width of the object of the present invention is achieved. The width of the outer clearance is generally 3 mm to 30 mm, or 5 mm to 50 mm, so that the depth of depression of the recess 24 of the top sheet 20 and the recess 44 of the back sheet 40 varies accordingly. do.

As previously described, the recesses formed in both the outer margin and the absorbent core prevent the longitudinal outer margin adjacent to the longitudinal center of the absorbent pad from collapsing with its outer margin or the wings disposed in the longitudinal center of the pad. . In addition, the width of the absorbent core at the longitudinal center of the pad is extended by the width corresponding to the width of the outer clearance or the depth of depression of the recesses at the top and back sheets, thereby minimizing the possibility of lateral leakage at the longitudinal center of the core. do.

Various modifications or variations of the present invention can be made based on the review herein. Such modifications and additions are intended to fall within the scope and spirit of the invention as defined by the following claims.

Claims (20)

An absorbent pad comprising a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent core disposed between the top sheet and the back sheet, the absorbent pad having a long length in the longitudinal direction, A plurality of recesses opposed to each other in the width direction are formed at each of the longitudinal edges of the top sheet, the back sheet, and the absorbent core, respectively. The recesses of the top sheet, the back sheet and the absorbent core are located corresponding to each other, The narrowest width between the two opposing recesses in the width direction of the top sheet is equal to or smaller than the width at the longitudinal center of the absorbent core, And the narrowest width between the two opposing recesses in the width direction of the backsheet is equal to or smaller than the width at the longitudinal center of the absorbent core. The absorbent pad of claim 1 wherein said pad is a feminine sanitary napkin or an incontinence pad. The absorbent pad according to claim 1, wherein the plurality of recesses of the top sheet include four recesses. The absorbent pad of claim 1 wherein the plurality of recesses of the backsheet comprise four recesses. The absorbent pad of claim 1 wherein the plurality of recesses of the absorbent core comprise four recesses. The absorbent pad according to claim 1, wherein the depth of each recess of the top sheet, the back sheet and the absorbent core is 3 mm to 30 mm. The absorbent pad according to claim 1, wherein a depth of each recess of the top sheet, the back sheet and the absorbent core is 5 mm to 50 mm. The absorbent pad as set forth in claim 1, wherein a width between two concave portions facing each other in the width direction of the absorbent core is 5 cm to 15 cm. The absorbent pad as set forth in claim 1, wherein the width between the two opposing recesses in the width direction of the absorbent core is 5 cm to 10 cm. The absorbent pad according to claim 1, wherein the width at the longitudinal center of the absorbent core is larger than the width between two concave portions that face each other in the width direction of the absorbent core. An absorbent pad comprising a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent core disposed between the top sheet and the back sheet, the absorbent pad having a long length in the longitudinal direction, Edge portions of the top sheet and back sheet form outer margins to enclose and seal the edges of the absorbent core, On each of the longitudinal edges of the top sheet and the back sheet, a plurality of wings extending laterally opposite to each other in a lateral direction, and a plurality of recesses are formed at positions where the plurality of wings and the longitudinal edge portion meet, A plurality of recesses are formed at both side edges of the absorbent core in the longitudinal direction to correspond to the recesses of the top sheet and the back sheet. The narrowest width between the two opposing recesses in the width direction of the top sheet is equal to or smaller than the width at the longitudinal center of the absorbent core, And the narrowest width between the two opposing recesses in the width direction of the backsheet is equal to or smaller than the width at the longitudinal center of the absorbent core. The absorbent pad of claim 11 wherein said pad is a feminine sanitary napkin or an incontinence pad. 12. The absorbent pad of claim 11 wherein the plurality of recesses of the top sheet comprise four recesses. 12. The absorbent pad of claim 11 wherein the plurality of recesses of the backsheet comprise four recesses. The absorbent pad of claim 11 wherein the plurality of recesses of the absorbent core comprise four recesses. 12. The absorbent pad of claim 11 wherein the depth of each recess of said top sheet, back sheet and absorbent core is between 3 mm and 30 mm. 12. The absorbent pad of claim 11 wherein the depth of each recess of said top sheet, back sheet and absorbent core is between 5 mm and 50 mm. 12. The absorbent pad as set forth in claim 11, wherein the width between the two opposing recesses in the width direction of the absorbent core is 5 cm to 15 cm. 12. The absorbent pad as set forth in claim 11, wherein the width between the two opposing recesses in the width direction of the absorbent core is 5 cm to 10 cm. 12. The absorbent pad as set forth in claim 11, wherein a width at the longitudinal center of said absorbent core is greater than a width between two concave portions facing each other in the width direction of said absorbent core.

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