JPH0721020U - Absorbent article - Google Patents

Abstract

(57) [Summary] [Purpose] An absorbent article which prevents slumping and leakage and has excellent touch. [Structure] A liquid-permeable top sheet, a liquid-impermeable and moisture-permeable back sheet, and an absorber interposed between both sheets,
The absorbent article has side flaps that extend outward from both lateral edges of the absorbent article, are folded back on the absorbent article and fixed at both longitudinal ends, and have free side edges provided with elastic elastic members. The flap is formed of a composite sheet consisting of an inner layer of a water-impermeable sheet having a thickness of 5 μm or more and less than 20 μm and an outer layer of a nonwoven fabric having a basis weight of 10 to 25 g / cm ² .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to absorbent articles such as diapers, pads and sanitary napkins for babies or incontinent persons.

[0002]

[Prior art]

 In a used incontinence protector or diaper, elastic members are attached to the outer edges of the side flaps that extend outward from both lateral edges of the absorbent body, and the side flaps are folded back to the upper surface, and the folded portion has a longitudinal direction. Japanese Patent Publication No. 3-57782 discloses that both ends are joined to each other and a pocket for receiving excrement is provided on both sides in the lateral direction. An absorbent article in which the side flaps are formed of an air-permeable waterproof sheet separate from the top sheet and the back sheet is disclosed in Japanese Utility Model Publication No. 4-33848.

[0003]

[Problems to be solved by the device]

 In the conventional incontinence protector or the diaper described in Japanese Patent Publication No. 3-57782 of the above-mentioned prior art, the feeling of use such as the leakage prevention of excrement and the touch is not perfect. Also, since the side flaps are made of a back sheet that extends outside the absorber, if a plastic sheet is used as the back sheet, the plastic sheet will come into direct contact with the skin and the skin feels uncomfortable. Even when a sheet of non-woven fabric is combined to improve the touch, the sheet strength is required to withstand the user's vigorous movement, and the plastic sheet becomes stiff and uncomfortable. Moreover, nothing is done to prevent stuffiness because it has neither breathability nor moisture permeability.

Further, in the absorbent article including the side flap described in Japanese Utility Model Publication No. 4-33848, which is formed of a sheet having ventilation and waterproof properties separate from the top sheet and the back sheet, improvement in prevention of stuffiness of the side flap portion is improved. However, since the back sheet, which occupies a large area in the absorbent article, is not done, the effect of preventing stuffiness is not substantially recognized.

Further, since a non-woven fabric or the like is used for imparting air permeability, the waterproof effect is insufficient and no improvement has been made regarding leakage. In addition, when a breathable film is used, the film strength is generally lower than that of a non-breathable film, so it is necessary to make the film thicker to maintain the same film strength. The side flaps are stiff and make the user feel uncomfortable. The present invention aims to solve such problems.

[0006]

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a side flap part which is separate from a topsheet and a backsheet, and is impermeable to water, which is thinner than the backsheet and soft, and has a softness of 5 μm or more and less than 20 μm. A composite sheet with a non-woven fabric having a basis weight of 10 to 25 g / m ² is used to form a side flap whose outer layer that comes into contact with the user's skin is a non-woven fabric, and a moisture-permeable sheet is used for the back sheet. is there .

The present invention will be described in detail. A liquid-permeable top sheet, a liquid-impermeable and moisture-permeable back sheet, and an absorbent body interposed between the two sheets, and lateral outer edges of the absorbent body in the same direction. In the absorbent article, the side flap portion extending to the folded back portion is folded back on the absorber, and both ends in the longitudinal direction of the folded portion are joined together, and the elastic elastic member is provided at the flap free edge. The side flap portions extending from the both side edges in the same direction to the outside in the same direction are composed of an impermeable sheet of 5 μm or more and less than 20 μm and a nonwoven fabric having a basis weight of 10 to 25 g / m ² which are separate from the top sheet and the back sheet. It is a composite sheet.

[0008]

[Action]

 In the absorbent article of the present invention configured as described above, the liquid-impermeable side flap seals between the liquid flap and the body of the wearer of the diaper while the central portion in the longitudinal direction thereof stands up, and the free edge of the side flap and the flap base. Form a pouch between the end pieces to prevent leaks. In addition, for the liquid impermeable side flaps, use a soft, water-impermeable sheet that is thinner than the back sheet, and a non-woven sheet on the outside that touches the wearer's skin. Therefore, it does not make the wearer feel uncomfortable.

[0009]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to the drawings showing embodiments, but the present invention is not limited to these embodiments. FIG. 1 is a perspective view of an absorbent article 1 according to an embodiment of the present invention in a stretched state. The absorbent article 1 of FIG. 1 is different from the topsheet 2, the backsheet 3, the absorbent body 4, and the backsheet that extends outward in the same direction from both lateral edges of the absorbent body and has elastic members attached thereto. Including the body side flaps 5. FIG. 2 is a perspective view of the absorbent article of the present invention shown in FIG. 1 in a free state. FIG. 3 is a sectional view taken along the line XX ′ of FIG.

As shown in FIGS. 3 and 4, the top sheet 2 and the absorbent body 4 extend outward from the side edges thereof. As shown in FIGS. 1 and 2, the topsheet 2 and the backsheet 3 extend in the same direction from both longitudinal ends of the absorbent body 4, and the outer end of the topsheet 2 and the outer end of the backsheet 3 are shown. Are glued to each other. As shown in FIGS. 3 and 4, the liquid-impermeable composite sheet of the side flap 5 is joined to the back sheet 3 so as to extend outside the side edge of the absorbent body, and along the side edge of the absorbent body 4. It is folded back on the absorbent body, the longitudinal ends of the folded portion are joined to form a flap, and the elastic elastic member 7 is arranged in an extended state on the flap free edge 6 so that the elastic elastic member 7 is not restrained. When left to stand, the elastic elastic member 7 contracts freely, and the free edge 6 of the flap on which the elastic elastic member 7 is arranged rises from the base end 8 and separates from the absorber, forming an opening with gathers and forming a pouch. It will be.

As the top sheet 2 used here, a liquid-permeable nonwoven fabric made of polyethylene, polypropylene, or other thermoplastic fiber is used. The stretchable elastic member 7 arranged at the free edge of the flap is made of urethane film, urethane thread, urethane foam, thread rubber or the like. The stretchable elastic members 7 are respectively arranged in the stretched state on the free edges of the flaps, and are fixedly adhered by a hot melt adhesive.

The absorbent body 4 is preferably composed of fluff pulp as a main material together with a super-absorbent polymer, and other absorbent paper units or a mixture or laminate of heat-fusible fibers are used. The structure of the absorber may be an hourglass type or a rectangular type, but the hourglass type provides better fit. Further, it is preferable that the fluff pulp is mixed in the upper layer and the fluff pulp and the super absorbent polymer are mixed or laminated in the lower layer to wrap them with a tissue to form a laminated structure. In this case, in the absorbent body 4, the upper-layer absorbent body 9 is formed in an hourglass shape with a narrow width at least at the crotch portion in the central portion in the longitudinal direction, and the lower-layer absorbent body 10 has a rectangular shape with the same width as the narrow width of the upper-layer absorbent body. It is preferable that these layers are laminated.

A liquid-impermeable, moisture-permeable polyethylene sheet obtained by providing the back sheet 3 with moisture permeability by forming fine holes in the polyethylene sheet is used. In addition, even if a liquid-impermeable sheet that is made by adding a filler to a thermoplastic resin and stretching it to give it moisture permeability and breathability is used, it is comfortable without fear of stuffing. The backsheet 5 needs to have a thickness of 20 to 40 μm.

As the liquid-impermeable composite sheet of the side flaps 5, as shown in FIGS. 3 and 4, the non-woven fabric 12 for improving the touch is arranged on the side around the legs that touches the skin. A composite material is used in which a polyethylene sheet 11 or the like having a smaller thickness than the sheet 3 and being soft is stuck inward. In this case, the polyethylene sheet 11 of the composite sheet should be 5 μm or more and less than 20 μm and the basis weight of the nonwoven fabric 12 should be 10 to 25 g / m ² .

As shown in FIG. 3, the composite sheet of the polyethylene sheet 11 and the non-woven fabric 12 may be adhered to each other by a composite sheet in which a polyethylene film is adhered to the entire inner surface of the non-woven fabric. It may be any of composite sheets obtained by laminating a film from the base end portion 8 of the flap to the free edge 6 while leaving a part of the nonwoven fabric as shown in FIG. The laminating method may be any of an extrusion laminating method, a dry laminating method, pressure fusion bonding by hot embossing, bonding by a hot melt adhesive, ultrasonic bonding and the like.

[0016]

[Effect of device]

 As described above, according to the present invention, it is possible to provide an absorbent article having a side flap that does not leak excrement, does not cause discomfort to a wearer, and has a good touch.

[Submission date] October 27, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

[0012] absorber 4 rather preferably those which in combination with superabsorbent polymer fluff pulp in the main material, mixture or laminate of such other absorbent paper single body or heat fusible fibers are used. The structure of the absorber may be an hourglass type or a rectangular type, but the hourglass type provides better fit. Further, it is preferable that the fluff pulp is mixed in the upper layer and the fluff pulp and the super absorbent polymer are mixed or laminated in the lower layer to wrap them with a tissue to form a laminated structure. In this case, in the absorbent body 4, the upper-layer absorbent body 9 is formed in an hourglass shape with a narrow width at least at the crotch portion in the central portion in the longitudinal direction, and the lower-layer absorbent body 10 has a rectangular shape with the same width as the narrow width of the upper-layer absorbent body. It is preferable that these layers are laminated.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

As the liquid-impermeable composite sheet of the side flaps 5, as shown in FIGS. 3 and 4, the non-woven fabric 12 for improving the touch is arranged on the side around the legs that touches the skin. A composite material is used in which a polyethylene sheet 11 or the like having a smaller thickness than the sheet 3 and being soft is stuck inward. In this case, the polyethylene sheet 11 of the composite sheet must be 5 μm or more and less than 20 μm , and the basis weight of the nonwoven fabric 12 must be 10 to 25 g / m ² .

[Brief description of drawings]

FIG. 1 is a perspective view of an article of the present invention in an extended state.

FIG. 2 is a perspective view of the article of the present invention in a free state.

3 is a sectional view taken along line XX of FIG.

FIG. 4 is a sectional view of another embodiment of the article of the present invention.

[Explanation of symbols]

 1: Absorbent article 2: Topsheet 3: Backsheet 4: Absorber 5: Side flap 6: Side flap free edge 7: Elastic elastic member 8: Side flap base end 9: Upper layer absorbent body 10: Lower layer absorbent body 11 : Water-impermeable sheet for side flaps 12: Non-woven fabric for side flaps

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 27, 1993

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

FIG. 3 is a sectional view taken along line XX ′ in FIG.

Front page continued (72) Inventor Miyuki Kimura 1-10-6 Shinonome, Koto-ku, Tokyo Oji Paper Co., Ltd. Research Center (72) Inventor Mie Takahashi 1-10-6 Shinonome, Koto-ku, Tokyo Oji Paper Paper Research Center

Claims (1)

[Scope of utility model registration request] 1. A liquid-permeable top sheet, a liquid-impermeable and moisture-permeable back sheet, and an absorber interposed between the both sheets,
Absorbency that extends outward from both lateral edges of the absorbent body, has a flap that is folded back on the absorbent body, and joins both longitudinal end portions of the folded portion, and an elastic elastic member is provided at the flap free edge. In the article, the side flap portions extending outward in the same direction from both lateral edges of the absorbent body are separated from the top sheet and the back sheet by 5 μm or more and less than 20 μm of an impermeable sheet inner layer and a basis weight. An absorbent article, which is formed of a composite sheet with a non-woven fabric outer layer of 25 g / m ² .