KR101062362B1 - sanitary pad - Google Patents

Abstract

The sanitary napkin of the present invention has a liquid absorbent core interposed between the liquid permeable surface sheet and the liquid impermeable back sheet, and the two sheets overlap each other by overlapping from the edge of the liquid absorbent core to be bonded to each other, so that both side edges and the front edge and the rear A sanitary napkin having an edge-shaped shape, wherein the liquid absorbent core is shaped to have a ridge raised toward the liquid permeable surface sheet, the ridge having a top portion formed on the rear portion on the longitudinal center line of the sanitary napkin, and a longitudinal center line from the top portion. The vertical ridge portion extends backward and decreases in height toward the rear edge, and the horizontal ridge portion extends in both width directions from the top portion and decreases in height toward both side edges. The present invention provides a sanitary napkin having a structure in which menstrual blood is prevented from leaking backwards, so that the menstrual blood is effectively absorbed, sweat is not caught in the buttocks, and the activity is improved.

Sanitary napkins, menstrual blood, prevent glands, wrinkles, ridges, bends

Description

Sanitary napkins

The present invention relates to a sanitary napkin.

Conventional sanitary napkins are usually formed by interposing a liquid absorbent core between a liquid permeable surface sheet and a liquid impermeable back sheet, and joining edges of both sheets to each other, and taking a structurally flat state. Recently, sanitary napkins are moving toward the trend of miniaturization and slimming to improve the absorption power of liquid absorbent cores and to reduce their size. However, most of these slim sanitary napkins are designed mainly for daytime activities or sitting in chairs. However, the wearer of the sanitary napkin spends a lot of time lying down or lying down while sleeping, in which case the menstrual blood is often leaking back, which is inconvenient. In addition, there is a steady demand for sanitary napkins while maintaining the ability to absorb fluid while wearing the body without discomfort.

The present invention is to provide a sanitary napkin having a structure in which menstrual blood is prevented from leaking backward to effectively absorb the menstrual blood. In another aspect, the present invention is to provide a sanitary napkin with no sweat on the buttocks, improved activity.

In the sanitary napkin according to the embodiment of the present invention, a liquid absorbent core is interposed between the liquid permeable surface sheet and the liquid impermeable back sheet, and the two sheets are overlapped and extended from the edges of the liquid absorbent core to be bonded to each other. A sanitary napkin having a shape having a front edge and a rear edge, wherein the liquid absorbent core is shaped to have a ridge raised toward the liquid permeable surface sheet, the ridge being rearward relative to a bisection of its length on the longitudinal centerline of the sanitary napkin. A top portion formed in the top portion, a vertical ridge portion extending rearward from the top portion along a longitudinal centerline and decreasing in height toward the rear edge thereof, and a horizontal ridge portion extending in both width directions from the top portion and decreasing in height toward both side edges; It is characterized by including a wealth.

The sanitary napkin according to the embodiment of the present invention may be characterized in that the liquid absorbent core has a curved convex portion in a region including a bipartite point of the length on the longitudinal centerline of the sanitary napkin.

Sanitary napkin according to an embodiment of the present invention may be characterized in that the liquid absorbent core has a wrinkle portion formed along the width direction of the plurality of wrinkles extending in the longitudinal direction in the front portion.

The sanitary napkin according to the embodiment of the present invention may be characterized in that the foot of the vertical ridge portion and the horizontal ridge portion of the liquid absorbent core is at least partially attached to the liquid impermeable back sheet to support the shape of the ridge.

Sanitary napkin according to an embodiment of the present invention may be characterized in that the lower portion of the plurality of wrinkles is at least partially attached to the liquid impermeable back sheet, the shape of the wrinkles is supported.

Sanitary napkin according to an embodiment of the present invention may be characterized in that between the ridge of the liquid-absorbent core and the liquid impermeable back sheet includes a shape support to support the shape corresponding to the shape of the ridge.

Sanitary napkin according to an embodiment of the present invention may be characterized in that the base of the vertical ridge portion adjacent to the edge of the liquid-absorbent core has a concave portion formed in the concave side edges.

The sanitary napkin according to the present invention has the effect of preventing the menstrual blood from leaking behind the gluteal sulcus in the state in which the wearer is lying on the back, and the menstrual blood is completely absorbed by the absorbent core. Therefore, the sanitary napkin according to the present invention is very useful for wearing at bedtime.

In addition, the sanitary napkin according to the present invention does not take sweat on the buttocks and does not show the appearance of wearing a sanitary napkin on the rear side, so that there is an effect of adding sophistication.

In addition, the sanitary napkin according to the present invention increases the absorption area by having a wrinkle portion, and can be elastically deformed in the width direction pressure, thereby improving the activity.

Hereinafter, specific embodiments of the sanitary napkin according to the present invention will be described. BRIEF DESCRIPTION OF THE DRAWINGS The drawings attached to the present invention are for convenience of description, and their shape and relative scale may be exaggerated or omitted.

1 is a perspective view showing a free state in which no external force is applied to a sanitary napkin according to an embodiment of the present invention. 2 is a plan view of FIG. 3 is a longitudinal cross-sectional view along the center line Y ₀ -Y ₀ of FIGS. 1 and 2, and FIGS. 3 to 7 are cross-sectional views corresponding to respective longitudinal positions shown in FIGS. 1 and 2. Figure 8 is a rear perspective view showing a liquid absorbent core and a support according to an embodiment of the present invention.

The sanitary napkin according to the present invention has a liquid absorbent core 30 interposed between the liquid permeable surface sheet 10 and the liquid impermeable back sheet 20, and both sheets overlap and extend from the edge 31 of the liquid absorbent core. Are bonded to each other to form the outer junction (120). The overall contour of the sanitary napkin is symmetrical with respect to the longitudinal center line (Y ₀ -Y ₀ ) and has a shape with both side edges and front and rear edges. A protruding flap 130 may be formed at the central portion of the side edge, and a concave portion 140 may be formed at the rear portion thereof. Sanitary napkins are usually worn to the outer surface of the liquid impermeable back sheet 20 is fixed to the underwear by the adhesive.

In the present invention, the direction of the arrow of Figs. 1 and 2 is referred to as the front, and the front is referred to as the front part and the rear is the rear part based on the line X ₀ -X ₀ which divides the entire length into two parts. When the sanitary napkin is worn on the human body, the liquid permeable surface sheet 10 side is in contact with the skin, and the front side is worn in the direction toward the urethra and the rear side toward the anal side.

The liquid absorbent core 30 is curved to have a raised portion 300 which is raised toward the liquid permeable surface sheet, the raised portion 300 having a bipartite point of its length on the longitudinal center line Y ₀ -Y ₀ . A, hereinafter referred to as a 'center point', the top portion 301 is formed in the rear portion, and the vertical ridge portion 302 extending rearward along the centerline from the top portion 301 and the height decreases toward the rear edge And a horizontal ridge portion 303 extending from the top portion 301 toward both edges in the width direction and decreasing in height toward both side edges (see FIGS. 3 and 5). In front of the top portion 301 has a latex portion (304) where the menstrual blood can accumulate.

Both horizontal ridge portion 303 may extend from the top portion 301 toward both edges in the width direction and may be slightly inclined toward the front side (see FIG. 2) so that the latex portion 304 may have an open corner shape. In this case, both horizontal ridge portions 303 are referred to as extending in the width direction.

The liquid-absorbent core 30 is preferably molded to have the ridge 300 as described above in a free state where no external force is applied, and the inner size of the outer joint part 120 is adjusted to fit the edge 31 in the free state. By being formed, some restraining force is provided by the liquid permeable surface sheet 10 and the liquid impermeable back sheet 20 so that the shape of the ridge 300 is not deformed when an external force is applied, and also provides a restoring force after the deformation. Done.

A hydrophilic capture sheet 40 may be further included between the liquid absorbent core 30 and the liquid permeable surface sheet 10 to disperse the menstrual blood in order to improve the absorption action of the menstrual blood with the liquid absorbent core 30.

The liquid permeable surface sheet 10, the liquid absorbent core 30, the capture sheet 40, and the liquid impermeable back sheet 20 are at least partially mutually attached at portions other than the outer junction 120 to limit mutual flow. On the other hand, the shape revealed by the liquid permeable surface sheet 10 is substantially the same as the shape of the liquid absorbent core 30. Thus, the names of the parts of the ridge 300 defined for the liquid absorbent core 30 are also the same for the whole sanitary napkin. The mutual attachment between the layers described above can be carried out by adhesive or by thermal welding.

In particular, the shores of the longitudinal ridge portion 302 and the horizontal ridge portion 301 of the liquid absorbent core 30 are at least partially attached to the liquid impermeable back sheet 20 in a flat state so that the shape of the ridge is supported. It is preferable. For example, in FIG. 8, the liquid absorbent core 30 is shown in an inverted state, and the adhesive is applied to the dotted line portion 320 adjacent to the edge of the ridge 300 to be adhered to the liquid impermeable back sheet 20. When the liquid absorbent core 30 is heat weldable, it is also possible to heat weld the dotted line part 320.

The sanitary napkin is worn so that the centerline (Y ₀ -Y ₀ ) of FIGS. 1 and 2 corresponds to an imaginary line connecting the vagina and the anus of the body. Although somewhat different depending on the wearer's body, when the top 301 of the ridge 300 is aligned with the anus, the center point A of the center line corresponds to the vaginal opening, and the distance between them is in the range of about 30 to 70 mm. Becomes The rear end of the longitudinal ridge portion 302 of the liquid absorbent core 30 corresponds approximately to the caudate bone, which is about 120 to 180 mm from the center point A to the rear. The vertical ridge portion 302 has an extension length of about 70 ~ 100mm, it is preferable to wear so as to match the gluteal portion between the anus and the calf. The ridge 300 has a height 301 of the top portion of about 15 to 50 mm, and a total extension length of both horizontal ridge portions 301 is preferably 300 to 900 mm. Of course, the dimension range can be increased or decreased according to the standard body size and functional needs of the group to be worn.

When the sanitary napkin according to the present embodiment is worn, both horizontal ridge portions 301 act as a barrier, and in front of the wearer having a fluid part (遊 液 部, 304) in which menstrual blood may be accumulated, It prevents menstrual blood from leaking back into the gluteal cleft, and the menstrual blood is smoothly absorbed into the liquid absorbent core 30. As described above, this effect may be further improved when the latex portion 304 has an open corner portion. On the other hand, the menstrual blood flowing over the horizontal ridge portion 301 is absorbed by the vertical ridge portion 302 in close contact with the gluteal recessed portion is completely blocked from leaking back menstrual blood. Therefore, the sanitary napkin according to the present invention is very useful when worn at bedtime.

On the other hand, it is preferable to form an outline such that both side edge rear portions are provided with recesses 140 formed to be recessed so that the base of the vertical ridge portion 302 is adjacent to the edge of the liquid absorbent core. The sanitary napkin has this recessed portion 140 so that the buttocks of the human body do not need to be covered by the sanitary napkin directly when worn, so that the buttocks are not directly covered by the sanitary napkin. It has the effect of adding sophistication.

A space 310 may be formed between the ridge 300 of the liquid absorbent core 30 and the liquid impermeable back sheet, and an auxiliary liquid absorbent may be inserted into the space 310 to increase the amount of liquid absorbed. Can be. The auxiliary liquid absorbent may use the same material as the liquid absorbent core, or may use a light and soft foreign material such as cotton.

In addition, a shape support 410 made of an elastic material may be disposed on the back surface of the ridge between the liquid absorbent core and the liquid impermeable back sheet 20 to support the shape. As shown in FIG. 8, the shape support 410 has a shape corresponding to the shape of the ridge 300 of the liquid absorbent core 30 described above to elastically support the shape of the ridge and to prevent deformation. Has the effect of improving the resilience. The lower edge portion of the shape support 410 is preferably at least partially attached to the liquid impermeable back sheet 20 in a flat state so that the support function of the shape support 410 is reinforced.

As another embodiment of the present invention, the curved convex portion 360 may be formed in a region including the center point A of the liquid absorbent core. The curved convex portion 360 is formed to have a smoothly convex shape, and the highest height thereof in the free state is preferably equal to or less than the height of the ridge top portion 301. 9 and 10 show perspective and longitudinal cross-sectional views of this embodiment. As shown in the figure, the curved convex portion 360 may support the shape by inserting the auxiliary liquid absorbing body 361 on the rear surface thereof. The auxiliary liquid absorbing body may be formed integrally or separately from the same material as the liquid absorbing core, or more preferably, a light and soft material such as cotton or the like may be used. The convex curved portion 360 has an effect of maintaining the state in which the liquid absorbent core is spaced apart from the vaginal sphere when the wearer is lying down, thereby maintaining a close state.

Meanwhile, the liquid absorbent core 30 may include a wrinkle part 330 having a plurality of wrinkles extending in the longitudinal direction along the width direction on the basis of two points of the length of the sanitary napkin.

Such wrinkles increase the area of the liquid absorbent core 30 to increase the liquid absorbing ability, and can be elastically deformed in the width direction by both thighs when worn, thereby improving activity. The bottom of the pleats is preferably at least partially attached to the liquid impermeable back sheet 20 so that the shape of the pleats is supported. 8 shows an example in which this attachment portion is indicated by the dotted line area 340. The attachment may be performed by adhesive or thermal welding.

It is preferable that the liquid absorbent core 30 is formed to have a plurality of pleats 330 as described above in a free state where no external force is applied to the liquid absorbent core 30, and as shown in FIG. By forming the junction 120 size, some degree of restraining force is provided by the liquid permeable surface sheet 10 and the liquid impermeable back sheet 20 so that the shape of the pleats 330 is maintained when an external force is applied. As shown in FIG. 7, the liquid permeable surface sheet 10 and the capture sheet 40 covering the pleats 330 of the liquid absorbent core 30 are slightly curved according to the folds of the pleats, but are almost flat. Will be maintained.

In addition, as shown in FIG. 8, a wrinkle support 420 made of an elastic material may be disposed on the back surface of the wrinkle portion 330 between the liquid absorbent core and the liquid impermeable back sheet 20 to support the wrinkle shape. Can be. The wrinkle support 420 elastically supports the shape of the wrinkle part 330 and has an effect of improving the restoring force against deformation. The pleat bottom of the pleat support 420 is preferably at least partially attached to the liquid impervious back sheet 20 in a flat state, such that the support function of the pleat support 420 is reinforced.

The material used for each part in this invention is demonstrated as follows. The liquid permeable surface sheet 10 may be a nonwoven fabric or a perforated plastic film, and the liquid impermeable back sheet 20 may be a plastic film or the like. As the liquid absorbent core 30, a mixture of high absorbent polymer particles in pulverized pulp or pulverized pulp may be used. The capture sheet 40 may be used by using hydrophilic natural fibers or synthetic fibers, or by spraying or immersing a surfactant on the synthetic fibers. The shape support 410 and the corrugated support 420 may be made of a nonwoven fabric using thermoplastic synthetic fibers. However, the material is merely an example, and is not limited to the material as long as the object and function of the present invention can be achieved.

The sanitary napkin disclosed above is possible in various modifications without departing from the basic idea. Accordingly, all the embodiments disclosed above should be interpreted as illustrative and not restrictive. Therefore, the protection scope of the present invention should be defined according to the appended claims rather than the above-described embodiment. Substitution of equivalents of the appended claims is within the scope of the appended claims.

1 is a perspective view showing a free state of the sanitary napkin according to an embodiment of the present invention.

2 is a plan view of FIG.

3 is a longitudinal cross-sectional view taken along the line Y ₀ -Y ₀ in FIG.

4 is a cross-sectional view along the line X ₁ -X _{1 of} FIG.

FIG. 5 is a cross sectional view taken along line X ₂ -X ₂ of FIG. 1; FIG.

FIG. 6 is a cross-sectional view taken along line X ₀ -X ₀ of FIG. 1. FIG.

FIG. 7 is a cross-sectional view taken along line X ₃ -X ₃ of FIG. 1. FIG.

Figure 8 is a rear perspective view showing a liquid absorbent core and a support according to an embodiment of the present invention.

9 is a perspective view of another embodiment of the present invention.

10 is a longitudinal sectional view of another embodiment of the present invention.

Claims (12)

A liquid absorbent core is interposed between the liquid permeable surface sheet and the liquid impermeable back sheet, and the sheets are overlapped and extended from the edges of the liquid absorbent core and bonded to each other, so as to have a shape having both side edges and a front edge and a rear edge. As a sanitary napkin, The liquid absorbent core is molded to have raised portions toward the liquid permeable surface sheet, The ridge is a top portion formed in the rear portion on the longitudinal center line of the sanitary napkin based on the bisection of its length, and a vertical ridge portion extending rearward along the longitudinal center line from the top portion and the height decreases toward the rear edge; Sanitary napkin, characterized in that it comprises a horizontal ridge portion extending in both width directions from the top portion and the height is reduced toward both side edges. The sanitary napkin according to claim 1, wherein the liquid absorbent core has a curved convex portion in a region including a bipartite point of the length on the longitudinal centerline of the sanitary napkin. The sanitary napkin according to claim 1, wherein the liquid absorbent core has a wrinkle portion formed along a width direction of a plurality of wrinkles extending in the longitudinal direction in the front portion. The sanitary napkin according to claim 1, wherein the longitudinal and ridge portions of the liquid absorbent core are at least partially attached to the liquid impermeable back sheet so that the shape of the ridge is supported. The sanitary napkin according to claim 2, wherein an auxiliary liquid absorbent is inserted into a rear surface of the curved convex portion. 4. The sanitary napkin of claim 3, wherein the lower portion of the plurality of pleats is at least partially attached to a liquid impermeable back sheet such that the shape of the pleats is supported. The sanitary napkin according to claim 1, further comprising a shape support on the rear surface of the ridge between the ridge of the liquid absorbent core and the liquid impermeable back sheet to support the shape of the ridge. 8. The sanitary napkin of claim 7, wherein the bottom edge of the shaped support is at least partially attached to the liquid impervious back sheet in a flat state, thereby reinforcing the supporting function of the shaped support. The sanitary napkin according to claim 3, wherein a wrinkle support is disposed on the back side of the wrinkle portion between the liquid absorbent core and the liquid impermeable back sheet to support the wrinkle shape. The sanitary napkin according to claim 1, wherein an auxiliary liquid absorbent body is inserted into a space between the ridge of the liquid absorbent core and the liquid impermeable back sheet. The sanitary napkin according to claim 1, wherein the longitudinal ridge portion has a concave portion in which both side edge rear portions are concave so that the base of the vertical ridge portion is adjacent to the edge of the liquid absorbent core. The sanitary napkin according to claim 1, wherein both transverse ridges extend from the top toward both edges in the width direction and extend inclined toward the front to form an open corner at the front of the top.

Images