JPH0524024U - Sanitary napkin - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the fit to the crotch area, especially to increase the standing degree of the rear part, and prevent leakage. A substantially elongated sanitary napkin comprising a liquid-permeable sheet 1, a liquid-impermeable sheet 2, and an absorbent body 3 interposed between the sheets 2 and 2 for absorbing drainage. A flap portion F is formed by at least one of the liquid-permeable sheet 1 and the liquid-impermeable sheet 2 extending outward from both side edges of the absorbent body in the middle in the longitudinal direction.
The elastic expansion / contraction member 4 for exerting a contracting force in the longitudinal direction is provided on each of the elastic expansion / contraction members 4 and 4 so that the elastic expansion / contraction members 4 and 4 are open to the rear side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sanitary napkin and a sanitary napkin having improved fit to a wearer.

[0002]

[Prior Art]

 As a property of the sanitary napkin, it is required that the sanitary napkin fit well to the crotch part when worn.

However, the absorbent body in the conventional sanitary napkin is a semi-rigid body having a necessary minimum thickness and a necessary absorption / holding capacity for drainage.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional napkin, since the absorber is a semi-rigid body, the front and rear portions in the longitudinal direction are not sufficiently curved at the time of wearing, and thus the fit to the crotch portion is lacking. If this fit is insufficient, menstrual blood cannot be sufficiently absorbed and held by the absorbent body during use, which often causes side leakage.

On the other hand, in the night sanitary napkin, the area or thickness of the absorber on the spine side is increased in order to use it in a sleeping state. However, even if the absorptivity of the back is increased in this way, it does not make sense unless the back is properly curved and fitted to the buttocks side.

Therefore, an object of the present invention is to improve the fitting property to the crotch portion and prevent side leakage and front and rear leakage.

[0007]

[Means for Solving the Problems]

 The above-mentioned problem is a substantially elongate sanitary napkin including a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body that is interposed between the sheets and absorbs drainage. In the above, at least one of the liquid-permeable sheet and the liquid-impermeable sheet extending outward from the both side edges of the absorbent body forms a flap portion, and elastic expansion and contraction for applying a contracting force in the longitudinal direction to each flap portion. It is possible to solve the problem by providing a member and providing each of the elastic expansion / contraction members in the shape of an open V on the rear side.

[0008]

[Action]

 In the present invention, since the flap portion is formed and the elastic stretchable member is provided on this flap portion, the front and rear portions of the absorber, which is a semi-rigid body, are curved in a boat shape due to the contracting force. However, if this bending depends only on the contracting force of the elastic expansion / contraction member, it is necessary to increase the contracting force in order to make the bending sufficiently. However, if the contraction force is increased excessively, it will be spent exclusively on the contraction of the elastic stretchable member of the absorbent body in the length range equivalent to the length range, and the liquid-permeable sheet, for example, the non-woven fabric, will also contract, resulting in a large number of lateral grooves. It is formed. As a result, menstrual blood flows laterally along these grooves, which in turn causes lateral leakage.

Therefore, there is a limit to increase the contraction force of the elastic expansion / contraction member. However, according to the present invention, when the elastic expansion and contraction members are not aligned in the longitudinal direction but are formed in the shape of a V-shape that opens to the rear side, that is, at an angle, the rear part of the napkin can be easily bent and raised. become. The reason for this will be described later.

[0010]

【Example】

 Next, the present invention will be described in detail with reference to examples. 1 to 3 show a sanitary napkin according to the present invention, and FIG. 4 is a perspective view of a curved state of the napkin in a used state. The upper side of FIG. 1 is the ventral side, and the lower side is the dorsal side.

Reference numeral 1 is a liquid-permeable sheet made of a nonwoven fabric or a large number of perforated plastic sheets, and 2 is a liquid-impermeable sheet made of a polyethylene sheet or the like, and an absorber 3 is interposed therebetween. The planar shape of this napkin is elongated as a whole, and the central portion in the longitudinal direction of the absorbent body 3, that is, the crotch-corresponding portion is slightly narrowed.

Further, the liquid-permeable sheet 1 and the liquid-impermeable sheet 2 extend outward from the peripheral edge of the absorbent body 3, and both sheets 1 and 2 are separated by a hot melt adhesive or heat seal. And the flap portion F is formed.

Further, in the flap portion F, which is slightly closer to the ventral side, the elastic stretchable member 4 is interposed between the liquid-permeable sheet 1 and the liquid-impermeable sheet 2, and the elastic member 4 is stretched by the hot melt adhesive in the expanded state. It is fixed and integrated. As the elastic expansion / contraction member 4, one or a plurality of parallel rubber threads, band-shaped rubber, or elastic foam band such as urethane can be used.

Although the absorbent body 3 can be formed of only one layer of cotton-like pulp, in the embodiment, as shown in FIG. 2, it has a double structure of an upper absorbent body 31 and a lower absorbent body 32. . The lower absorbent body 32 is provided only in the longitudinal middle portion and the widthwise middle portion, and the ventral portion is constricted in order toward the front. According to this double structure, since the total amount of the absorbent body from the portion where menstrual blood is discharged to the dorsal portion is large, the absorbent capacity in the sleeping state is large.

Further, the upper absorbent body 31 and the lower absorbent body 32 can be wrapped with a cotton paper mount 9 made of a tissue or the like in order to reinforce the shape retaining force. The bottom surface of the liquid-impervious sheet 2 is coated with a slip-preventing hot melt adhesive 7 in an appropriate pattern, which is covered with a release paper 8. At the time of mounting, the release paper 8 is peeled off and the hot melt adhesive 7 portion is pressed against shorts (not shown) to prevent the napkin from being displaced from the shorts.

In the present invention, in particular, the elastic expansion / contraction member 4 is arranged not in parallel to the center line L of the napkin but in a V-shape that opens to the rear side. When the elastic stretchable members 4, 4 are arranged as described above, it is considered that the upstanding property of the absorber 3, in other words, the rear portion of the napkin is improved for the following reason. That is, when the width direction of the napkin is X and the longitudinal direction is Y, and the arrangement mode of the elastic expansion / contraction member 4 is parallel to the center line L of the napkin, a part of the contraction force of the elastic expansion / contraction member 4 is The absorber 3 is used for contraction in the longitudinal direction, and the rest acts as a bending force in the front-back direction. Therefore, even if it curves in the front-back direction, it tends to curve in a plane. On the other hand, according to the present invention, in the case of the V-shaped arrangement, the component force in the X direction of the contracting force F along the longitudinal direction of the elastic member is F ₁ , and the component force in the Y direction is F _2. I can forget. In this case, once the bending force in the width direction acts due to the component force F ₁ and the napkin bends inward in the width direction, the component force F ₂ as the bending force in the front-back direction is used for contraction of the absorber 3. Instead, it is used exclusively for bending in the front-back direction. Therefore, due to the component force F ₁ and the component force F ₂ , the napkin is not planar and bends not only in the front-back direction but also in the width direction. That is, as shown in FIG. 4, it is three-dimensionally curved.

As a result, the component force F ₂ appears as a bending force as it is, and the standing degree of the back portion becomes large. In addition, since it also curves in the width direction, the fit to the crotch portion is extremely high.

In addition, at least in the vicinity of the rear side end of the contraction force of the elastic expansion / contraction member 4, cuts or notches 5 and 5 are formed from the side edge of the absorber 3, in the embodiment, the side edge of the upper absorber 31 toward the center. be able to.

In the present invention, the inclination angle θ (see FIG. 1) of the elastic expansion / contraction member 4 is set to 3 to 50 °, preferably 10 to 20 °. The separation distance D between the elastic stretchable member 4 and the absorber 3 is -5 to 35 mm, preferably 0 to 25 mm. As the length A of the elastic stretchable member 4 and its position N / M, A = 30 to 180 mm, preferably 80 to 130 mm, N / M = 0.2 to 0.7, preferably 0.3 to 0. 6 The M is the total length of the napkin, and the N is the distance from the front end of the napkin to the center of the elastic expansion / contraction member 4. Furthermore, the contraction force of the elastic expansion / contraction member 4 needs to be sufficient to lift the rear part of the napkin at the time of mounting. If this contraction force is too strong, only the elastic expansion / contraction member 4 part will be mounted in a contracted form. Therefore, the contraction force on one side of the elastic expansion / contraction member 4 is 30 to 300 g, preferably 100 g when expanded. ~ 200g.

The liquid-permeable sheet 1 and the absorbent body 3 or the paper backing paper 9 can be joined by a hot-melt adhesive applied in a planar spiral shape. Further, in the above example, the flap F is formed by both the liquid-permeable sheet 1 and the liquid-impermeable sheet 2, but one sheet is extended and doubled to form the flap portion F. May be.

[0021]

[Effect of the device]

 As described above, according to the present invention, the fit property to the crotch portion is improved, the degree of standing up especially at the rear portion is increased, and the effect of preventing leakage is great.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a sanitary napkin according to the present invention.

FIG. 2 is a view taken along the line 2-2 in FIG.

FIG. 3 is a view taken along line 3-3 in FIG.

FIG. 4 is a perspective view of a use state.

[Explanation of symbols]

1 ... Liquid-permeable sheet, 2 ... Liquid-impermeable sheet, 3 ... Absorber,
4 ... Elastic stretchable member.

Claims (1)

[Scope of utility model registration request] 1. A substantially elongated sanitary napkin comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body interposed between the sheets for absorbing drainage, at least in a longitudinal direction. At least one of the liquid-permeable sheet and the liquid-impermeable sheet that extends outward from both side edges of the absorber in the middle forms a flap portion, and elastic expansion and contraction to apply a contracting force in the longitudinal direction to each flap portion. A sanitary napkin characterized in that a member is provided, and each of the elastic expansion / contraction members is provided in a V-shape that is open to the rear side.