JP2585027Y2 - Sanitary napkin - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a sanitary napkin.

[0002]

2. Description of the Related Art In a sanitary napkin, a liquid-absorbent core is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and the core is deviated from both side edges of each portion biased to the front and rear ends thereof. First and second using the back sheet part extending toward
The technique of providing the two wing portions is conventionally known, and JP-A-5-49660 is an example thereof.
In this known technique, the lower surface of the sanitary napkin is fixed to the inner surface of the wearing shorts crotch portion by peelably attaching the lower surface thereof.
The wing portion is bent and releasably attached to the outer surface of the crotch portion to cover the periphery of the shorts leg, thereby preventing menstrual contamination. The second wing part covers the wearer's hip widely,
Prevent leakage of menstrual blood there.

[0003]

According to the above-mentioned known technique, a flap is formed by a top sheet or a back sheet made of a flexible sheet material such as a thin plastic film or a nonwoven fabric, and a sheet in which these sheets are joined to each other.
As one of the individual packages for such sanitary napkins, a flexible flap is bent along the side edge of the core, the outer shape of the napkin is adjusted to a substantially rectangular shape, and the napkin is folded in two or three in the longitudinal direction. May be in a bag. However, such a flap is creased along the core, and when it is desired to quickly wear the napkin, the first wing is folded back and attached to the outer surface of the crotch abutment, or the second wing is attached to the hip. There is a problem that it is difficult to spread it flat at a part, and it takes time to wear it.

[0004] In view of the above, the present invention provides first and second flaps.
By providing a reinforcing sheet piece extending between the wing parts and bending the flap along the inner edge of the sheet piece, one of the first and second wing parts is folded back and expanded on the folded napkin. Another object of the present invention is to solve the above-described problem by allowing the other wing portion to be easily turned back with the rigidity of the reinforcing sheet piece.

[0005]

Means for solving the above problems The present invention is as follows to solve the above problems.

In this invention, a liquid-absorbent core is interposed between a liquid-permeable topsheet and a liquid-impermeable backsheet, and extends outward from both side edges of each portion biased toward the front and rear ends of the core. A flap having first and second wing portions each including the back sheet portion to be protruded and an upper sheet bonded to at least an upper surface of the back sheet portion; and an adhesive application area on at least a lower surface of the first wing portion. A sanitary napkin is a prerequisite.

[0007] Under such a premise, a reinforcing sheet piece interposed between the first and second wing portions and having an inner edge having a required separation distance from a side edge of the absorbent core is joined to the flap,
It is a feature of the present invention that the entire napkin is folded in the longitudinal direction with the flap bent toward the core along the inner edge of the reinforcing sheet.

[0008]

In the sanitary napkin constructed as described above, the required strength can be imparted to the flap by the reinforcing sheet piece, and when the folded napkin is expanded, one of the first and second wings is folded back. And the other wing can be automatically extended by its rigidity.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the sanitary napkin according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view of a sanitary napkin 1, in which a top sheet 2 and a top sheet 6, which will be described later, are removed on the left side of a center line AA in the figure.

FIGS. 2 and 3 are sectional views taken along lines XX and YY of FIG.

Referring to FIGS. 1, 2 and 3, a sanitary napkin 1 is shown.
Is a body 5 composed of a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, a liquid-absorbent core 4 interposed between these two sheets 2, 3, and a portion extending from a side edge of the body 5. And a left and right flap 7 composed of a back sheet 3 and an upper sheet 6 covering the upper surface of the back sheet 3.

The main body 5 is a rectangular portion formed by bonding the front and back sheets 2 and 3 to each other outside the peripheral edge of the substantially rectangular core 4 by a heat seal wire 10. It has two adhesive application areas 11 for fastening to the inner surface of the crotch portion of the shorts, and a release paper 12 covering the application area 11.

The flap 7 has a first wing portion 15 biased toward the front end of the napkin 1, a second wing portion 16 biased toward the rear end, and first and second wing portions 15,.
16 and a concave curved portion 17 located between
And a reinforcing sheet 18 joined to the upper and lower sheets 6 and 6. The reinforcing sheet 18 has the same outline 19 as the flap 7 and an inner edge 20 parallel to the side edge of the core 4 at a separation distance d. The top sheet 6 has a sleeve 2 formed by bending the inner edge 21 along the longitudinal direction.
The elastic member 23 is adhered in the sleeve 22 in an extended state. The sleeve 22 is located at a position where it enters the main body 5 and is joined to the topsheet 2 by a heat seal wire 24 extending in the longitudinal direction. The heat seal wire 24 is substantially parallel to the center line A-A, but is deviated outward at the first wing portion 15, and when the napkin 1 is fixed to the shorts, the heat sealing wire 24 contracts with the topsheet 2 due to the contraction action of the elastic member 23. A pocket 25 whose edge 21 is open toward the center line AA is formed therebetween (see FIG. 2). In the first wing section 15, an adhesive application area 26 is provided on the lower surface of the back sheet 3.
When folded, it can be attached to the outer surface of the crotch part of the shorts to be worn. In the flap 7, the back sheet 3, the top sheet 6, and the reinforcing sheet 18 are integrally joined by a heat seal line 27 along the outline thereof.
These sheets can be joined at other required parts.

FIG. 4 is a plan view of the napkin 1 with the flap 7 bent inward. The napkin 1 bends the flap 7 along the inner edge 20 of the reinforcing sheet 18 so that the first left and right
The adhesive application area 26 of the wing portion 15 is covered with a release paper 27. When the flap 7 is stiffened to the required degree by the reinforcing sheet 18 extending between the first and second wings, the folding along the inner edge 20 can be facilitated, and the narrow concave portion is formed. If one of the first and second wing portions 15 and 16 is bent in spite of having the 17, the other wing can be automatically bent.

FIG. 5 is a perspective view showing a state in which the napkin 1 of FIG. 4 is folded in three in the longitudinal direction and packaged in individual bags 30 indicated by phantom lines. Normally, the napkin 1 immediately before use is in such a state. Therefore, when the napkin 1 is used, it is necessary to open the individual bag 30 and take it out, and then unfold it to the state shown in FIG. First, the release paper 12 is removed in the state of FIG. 4, the adhesive application area 11 is adhered to the inner surface of the crotch portion of the shorts to be worn, and then the release paper 27 is removed and the flap 7 is folded outward. Then, the second wing portion 16 spreads to the hip portion of the shorts worn, while the first wing portion 15
Since it goes out from the side edge of the crotch portion, it is bent along the side edge, and the adhesive application area 26 is attached to the outer surface of the crotch portion. Contrary to the case where the flap 7 is bent inward, the entire flap 7 can be folded by folding one of the first and second wing portions 15 and 16, and the second wing portion 16 can be relatively folded. Even when the napkin 1 is worn quickly, it is possible to prevent the napkin 1 from slipping and moving at the crotch portion or to be skewed even when the napkin 1 is to be worn quickly, despite the wide width.

In the napkin 1, the topsheet 2 has a nonwoven fabric having a basis weight of 10 to 100 g / m ² or a thickness of 0.01 to 0.1 g / m ² .
A 1 mm open plastic film or the like can be used, and the back sheet 3 can be a 0.02 to 0.2 mm plastic film. Flap 7
The same material as the top sheet 2 and the back sheet 3 can be used for the top sheet 6 constituting. The reinforcing sheet 18, rather than the top sheet 2 A is necessary to use a highly rigid sheet, for example, a large basis weight than the topsheet 2 50 g / m ² or more, more preferably 100 g /
It is possible to use a nonwoven fabric of m ² or more and higher density than the surface sheet 2 or a plastic film thicker than the surface sheet 2 and 0.03 mm or more, more preferably 0.05 mm or more. However, the reinforcing sheet 18 does not need to be formed into a nonwoven fabric or a plastic film in accordance with the surface sheet 2, and the material can be freely selected. As the liquid-absorbent core 4, pulverized pulp or a mixture of pulverized pulp and a superabsorbent polymer can be used. To join the sheets, an adhesive such as a hot melt adhesive or a technique of heat welding to a hot-melt material can be used.

The reinforcing sheet 18 may be provided on the lower surface of the back sheet 3 or the upper surface of the upper sheet 6 in addition to the illustrated example. The extended portion can be used as a top sheet in place of the top sheet 6 in the illustrated example.

[0019]

The sanitary napkin according to the present invention has a higher rigidity than a topsheet extending between the first and second wings and having an inner edge parallel to the liquid absorbent core side edge at a separation distance d. Since the reinforcing sheet is joined to the flap, it is easy to bend the flap when packaging the sanitary napkin, and it is easy to turn the flap when using the sanitary napkin.

[Brief description of the drawings]

FIG. 1 is a plan view of a sanitary napkin shown with a left half cut away.

FIG. 2 is an end view taken along line XX of FIG. 1;

FIG. 3 is an end view taken along line YY of FIG. 1;

FIG. 4 is a plan view of a napkin with a flap bent.

FIG. 5 is a perspective view of a folded napkin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Top sheet 3 Back sheet 4 Absorbent core 6 Top sheet 7 Flap 15 First wing 16 Second wing 18 Reinforcement sheet 20 Inner edge d Separation distance

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61F 13/15 A61F 13/56

Claims (1)

(57) [Scope of request for utility model registration] 1. A liquid-absorbent core is interposed between a liquid-permeable topsheet and a liquid-impermeable backsheet, and extends outward from both side edges of each portion biased to the front and rear ends of the core. A physiology having a flap provided with first and second wings composed of the back sheet part and an upper sheet joined to at least an upper surface of the back sheet part, and having an adhesive application area on at least a lower surface of the first wing part; In the napkin for use, a reinforcing sheet piece extending between the first and second wing portions and having an inner edge having a required distance from a side edge of the liquid-absorbent core is joined to the flap, and the flap is The sanitary napkin, wherein the entire napkin is folded in a longitudinal direction in a state where the napkin is bent toward the core along the inner edge.