JP3217822B2 - Sanitary napkin and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gourd-shaped sanitary napkin provided with a cracked portion in an absorbing portion, which prevents lateral leakage of bodily fluids when worn and obtains a good feeling of use. It is to try.

[0002]

2. Description of the Related Art Conventionally, there has been a gourd-type napkin in which an absorbent layer has a narrow crack, instead of a rectangular napkin. This gourd-type napkin was fitted to the narrow crotch of the wearer in the worn state, and was effective in preventing deformation such as twisting and twisting.

[0003] However, the gourd-type napkin has a drawback in that since the concave portion of the absorbent layer is formed to be narrow, the body fluid has a low absorbing ability for the body fluid diffused in the width direction and the body fluid tends to leak laterally from both sides of the concave portion. Had.

[0004] Further, the above-mentioned gourd-type napkin proposed for the purpose of preventing lateral leakage has been disclosed in Japanese Patent Application Laid-Open No. Sho 60-1.
There is an invention described in Japanese Patent No. 93461. The present invention
Elastic bodies are interposed in the flaps located on both sides of the crevice,
I'm trying to launch a flap in this area.

However, this proposed napkin is intended to raise narrow flaps protruding on both sides of the crevice, so that the napkin cannot be sufficiently raised, and if a large amount of body fluid is absorbed, the napkin still needs to be lifted. There was a drawback of causing lateral leakage.

Conventionally, in a rectangular napkin, a leak-proof layer is extended and protruded in a wing shape from flaps on both sides for the purpose of fastening to an outer surface of shorts. However, in this rectangular napkin, as shown in FIG. 16, both sides of the wing (1) on the side of the absorbent layer (2) are not notched, so that the fold interval (3) of the wing (1) is wide and the shorts (4) are not cut. Since the wing (1) cannot be folded back in accordance with the width of the napkin (5), there is a possibility that the napkin (5) may be displaced or distorted from a local area and cause lateral leakage.

Further, when trying to convert the wing having the above structure to a gourd-type napkin, there is a possibility that body fluid which is easily diffused from the cracked portion is transmitted through the wing and leaks to the outer surface side of the shorts.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made to solve the above-mentioned problem. An object of the present invention is to prevent deformation such as twisting and twisting, prevent lateral leakage of body fluid even when a large amount of body fluid is absorbed, and perform sanitary mounting.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a structure in which a space between a water-permeable topsheet and a water-impermeable leakproof sheet is narrower than that of the topsheet and the leakproof sheet. With a bodily fluid-absorbing absorption layer interposed, a flap protrudes from the outer periphery of the absorption layer, a narrow crack portion is provided on a part of both sides in the length direction of the absorption layer, and on both sides of the crack portion, The leak-proof sheet is extended outwardly on both sides, and wings that can be folded back and fixed are provided on the outer surface of the shorts, and both sides of this wing on the absorbent layer side are cut out in the direction of the absorbent layer to form notches and absorb. At both sides of the layer, the side leakage prevention pieces with elastic bodies inserted between the thermoplastic non-woven fabrics are fixed, and the outer edges of the side leakage prevention pieces project outward beyond the cutouts of the wings, and the side leakage prevention pieces are attached. Elastic body biases in the contraction direction and stands on both sides of the absorbent layer It is those made Gaité.

[0010] The method for carrying out the present invention is characterized in that an absorbent layer provided with narrow cracks on both sides in the length direction is placed on the surface of a water-impermeable leakproof sheet and then placed on the surface of the absorbent layer. Position the water-permeable topsheet, heat from the surface side of this topsheet, heat seal the outer periphery of the absorbent layer integrally with the leak-proof sheet, and bulge out both sides of the crack portion of the absorbent layer into an outward mountain shape. The wing is formed by heat sealing, and both sides of the sanitary napkin body are cut along the outside of the bulging heat seal, so that the wings protrude on both sides of the knurled part and both sides of the base of this wing The cut side is cut at the same time on the absorbent layer side, and the notch is provided.Then, the thermoplastic non-woven fabric is folded in half, and the side leakage prevention piece that sandwiches the elastic body in the bent part is bent outward on the bent part side. Located on the surface of the topsheet Both heat seals the absorption layer side of the side leakage preventing piece topsheet, is performed by cutting both ends in the longitudinal direction of the sanitary napkin main body after the heat-sealing.

[0011] The surface of the wing formed from the leak-proof sheet may be covered with a nonwoven sheet.

Further, the side leakage preventing piece formed separately from the nonwoven fabric sheet may be fixed to the topsheet.

The side leakage preventing piece may be formed by folding back the absorbent layer side of the nonwoven fabric sheet.

[0014]

Since the present invention is constructed as described above, in order for the user to put on the napkin, first, the user places the napkin down to the crotch with the leak-proof sheet facing the inner surface. The shorts are pulled up and worn as it is, and the wings exposed from both sides of the crotch side of the shorts are folded back to the outer side of the shorts.

The wing has cutouts formed on both sides on the absorption layer side, the cutouts being cut out in the direction of the absorption layer. Then, the wing can be turned back between the notches. Therefore, it is possible to bend the wing at a position inward of the outer edge of the outer peripheral flap located in the front-rear direction of the concave portion.

[0016] Therefore, the napkin can be folded and fastened in accordance with the width of the crotch portion of the shorts having a small interval, so that the napkin can be integrally fitted and fixed to the crotch portion of the shorts, and intense exercise can be performed. There is no deviation even by the above, twisting, twisting, etc. are prevented, and stable mounting is possible.

In the napkin, since the concave portion of the absorbent layer is formed narrow, the ability to absorb body fluid is slightly reduced. However, the napkin is located on both sides of the absorbent layer,
The side leakage prevention piece is fixed separately from the side flap. The lateral leakage prevention piece projects outward from the cutout portion of the wing, and is urged in the contraction direction by the restoring contraction force of the elastic body, and rises on both sides of the absorbent layer.

For this reason, the napkin is provided on both sides of the local part of the user by the side leakage prevention pieces rising up at a wider interval than the cutout of the wing, so that even if the body fluid is diffused from the narrow crevice portion, the napkin can absorb the body fluid. It prevents side leakage, prevents contamination of shorts and the like, and enables sanitary mounting.

If the surface of the wing formed by the leak-proof sheet is covered with a non-woven sheet, the feel is good,
The contact with the skin is also flexible, and a comfortable wearing feeling can be obtained.

If the side leakage prevention piece is formed separately from the nonwoven fabric sheet and fixed to the topsheet, the side leakage prevention piece can be formed while using a small amount of high quality material having excellent water repellency. It can be manufactured at low cost.

Further, if the side leakage prevention piece is formed by folding back the absorbent layer side of the nonwoven fabric sheet, there is no possibility that the formation position of the side leakage prevention piece is displaced, and simple manufacture is possible.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The first embodiment of the present invention will be described below with reference to the drawings. (10) is an absorbent layer formed of a bodily fluid absorbent such as cotton, pulp, etc. Is provided with a narrow crack portion (11) in a part thereof, and the entire shape is formed in a gourd shape. Then, this absorbing layer (10) is
As shown in (1), it is located on the surface of a water-impermeable leakproof sheet (12) such as a polyethylene film.

Next, as shown in FIG. 2, a water-permeable surface sheet (13) such as a mesh sheet wider than the absorption layer (10) is located on the surface of the absorption layer (10). Then, both sides of the topsheet (13) and both sides of the leak-proof sheet (12) not covered with the topsheet (13) are coated with a thermoplastic nonwoven sheet (14) made of fiber such as polyethylene or polypropylene. Cover. When formed in this way, the feel is better and the contact with the skin is more flexible than when only the leak-proof sheet (12) is exposed, so that a comfortable wearing feeling can be obtained.

From the surface of the nonwoven fabric sheet (14), the outer periphery of the absorbent layer (10) is heat-welded with a constant width, and the non-woven fabric sheet (14) and the leak-proof sheet (12) are heated and welded by the heat-welded portion (15). And) are heat-sealed integrally by a heat-sealing portion. In this case, both sides of the concave portion (11) are bulged in an outward mountain shape to provide a wing-shaped wing portion (16) and heat-sealed.

Next, after the heat sealing, the side flaps (1) are cut on both sides of the absorbent layer (10) as shown in FIG.
7), and wings (18) are formed so as to protrude on both sides of the concave portion (11). Also, when forming this wing (18),
Both sides of the base of the wing (18) are simultaneously cut to the side of the absorbent layer (10) to form a notch (19).

The conventional sanitary napkin body (2)
A side leakage prevention piece (23) is formed separately from the formation process of (0). This forming method folds a belt-shaped thermoplastic nonwoven fabric made of fibers such as polyethylene and polypropylene into two,
An elastic body (22) made of rubber or the like is sandwiched between the bent portions (21) in an extended state, and the elastic body (22) is fixed at appropriate intervals by hot melt or the like, and the central portion excluding both ends is integrally formed. Fixed to.

The bent portion (21) of the side leakage preventing piece (23)
The side is located outside the notch (19) of the wing (18) as shown in FIG. Then, the side of the absorbent layer (10) of the side leakage prevention piece (23) is heat-sealed to the surface of the nonwoven fabric sheet (14) along the outer peripheral shape of the absorbent layer (10), and is laterally placed on both sides of the absorbent layer (10). Fix the leak prevention piece (23). As described above, when the side leakage prevention piece (23) formed separately from the nonwoven fabric sheet (14) is fixed to the topsheet (13), the side leakage prevention piece (23) is made of a high quality material having excellent water repellency. 23) can be formed, and inexpensive manufacturing becomes possible.

Next, as shown in FIG. 5, both ends of the sanitary napkin body (20) in the longitudinal direction are cut at a predetermined interval from the absorbent layer (10), and cut in the longitudinal direction of the absorbent layer (10). An end flap (24) is formed to project.

Also, on the back surface of the leak-proof sheet (12), FIG.
Shorts by applying hot melt etc. as shown in (25)
An inner surface fastening portion (26) is formed on the inner surface. Again wing
(18) On the back side, shorts (25) External fastening part to the outer surface
(27) is formed. Further, the inner fastening portion (26) and the outer fastening portion (27) are separated from the release paper (2
8).

In the napkin (29) constructed as described above, in order for the user to wear the napkin (29), first, face the leak-proof sheet (12) on the inner surface of the shorts (25) lowered to the inseam. And fix the inner surface fixing portion 26 to the inner surface of the shorts 25.

In this state, the shorts (25) are pulled up and worn, and the wings (18) exposed from both sides of the crotch portion of the shorts (25) are attached as shown in FIG.
It is folded back to the outer surface side of (25), and the outer surface fixing portion (27) provided on the back surface of the wing (18) is fixedly fixed to the outer surface of the shorts (25).

The wing (18) has cutouts (19) formed on both sides on the side of the absorbing layer (10), as shown in FIGS. 5 and 6, cut out in the direction of the absorbing layer (10). Then, the wing (18) can be turned back between the notches (19). For this reason, the wings (18) are located inwardly of the outer edges of the side flaps (17) located in the front-rear direction of the concave portion (11).
Can be bent.

For this reason, as shown in FIG. 9, the napkin (29) has the shorts (25) so that the wings (18) can be folded back and fixed in accordance with the width of the crotch portion of the shorts (25) having a small interval. ) Can be fitted and fixed integrally with the crotch part, without slipping even by intense exercise, etc., preventing twisting, twisting, etc., and enabling stable mounting.

In the napkin (29), since the dent portion (11) of the absorbent layer (10) is formed to be narrow, the ability to absorb bodily fluids is slightly reduced. However, the napkin (29)
A lateral leakage preventing piece (23) is fixed to the front side of the nonwoven fabric sheet (14) covering both sides of the absorbent layer (10). As shown in FIGS. 5 and 6, the lateral leakage preventing piece (23) protrudes outward from the notch (19) of the wing (18) and contracts due to the restoring contraction force of the elastic body (22). And rises on both sides of the absorbing layer (10) as shown in FIG.

For this reason, the napkin (29) is formed on both sides of the local part of the user by a lateral leakage preventing piece (23) which rises at a wider interval than the notch (19) of the wing (18), so that the napkin (29) is narrow. Even if the body fluid is diffused from the portion (11), the body fluid is prevented from leaking sideways, and the shorts (25) and the like are prevented from being contaminated, so that sanitary wearing is possible.

In the first embodiment, the side leakage preventing piece (23) formed separately from the nonwoven fabric sheet (14) was fixed to the front side of the nonwoven fabric sheet (14). However, in the second embodiment, the side leakage prevention piece (23) is formed by folding the nonwoven fabric sheet (14) on the side of the absorbent layer (10). Hereinafter, the embodiment will be described in detail.

First, the operation is the same as that of the first embodiment up to the position of the water-permeable topsheet (13) on the surface of the absorbing layer (10).

Next, as shown in FIG. 10, both sides of the topsheet (13) and both sides of the leak-proof sheet (12) not covered with the topsheet (13) were heated with heat made of fiber such as polyethylene or polypropylene. Plastic nonwoven sheet (14)
Cover with. This non-woven fabric sheet (14) has an absorbent layer (10).
The inner side is folded back to the outer side, and an elastic body (22) such as rubber is sandwiched between the bent portions (21).

Next, the outer periphery of the absorbent layer (10) is heat-welded with a fixed width from the surface of the non-woven fabric sheet (14), and the non-woven fabric sheet (14) and the leak-proof sheet (1) are welded by the heat-welded portion (15).
2) is heat-sealed integrally by a heat-sealing portion. In this case, the wing portion (16) is formed by bulging the both sides of the concave portion (11) into an outward mountain shape and heat sealing in a wing shape.

Then, after the heat sealing, the cutter is cut along the outside of the heat seal portion using a cutter, so that side flaps are provided on both sides of the absorbing layer (10) as shown in FIG.
(17), and wings (18) on both sides of the concave portion (11)
To form a protrusion. When the wing (18) is formed, both sides of the base of the wing (18) are cut at the same time toward the absorbent layer (10) to form a notch (19).

Then, the bent portion (2) of the nonwoven fabric sheet (14)
1) is folded outward as shown in FIG.
Is located outside the notch (19) of the wing (18). Then, the side of the absorbent layer (10) of the lateral leakage prevention piece (23) is heat-sealed to the surface of the nonwoven fabric sheet (14) along the outer peripheral shape of the absorbent layer (10), and the lateral leakage is prevented on both sides of the absorbent layer (10). Prevention piece
(23) is fixed.

Next, as shown in FIG. 13, both ends of the sanitary napkin body (20) in the longitudinal direction are cut from the absorbent layer (10) at a predetermined interval, and are cut in the longitudinal direction of the absorbent layer (10). An end flap (24) is formed to project.

As described above, by forming the side leakage prevention piece (23) by folding back the absorbent layer (10) side of the nonwoven fabric sheet (14), the formation position of the side leakage prevention piece (23) may be shifted. And simple production becomes possible.

[0044]

According to the present invention since it is obtained by the above structure, when wearing the napkin, to a fastening available-folding wings corresponds to the width of the crotch portion of the narrow shorts interval
Eyes that, integrally fixed to fit the crotch of the shorts, it is not, such as displaced by strenuous exercise, etc., to prevent twisting, the twisting, etc., it is possible to stable mounting.

Further, the lateral leakage preventing pieces which stand on the both sides of the local area of the user at a wider interval than the cutout of the wing prevent lateral leakage of the body fluid even if diffusion of the body fluid occurs from the narrow crevice portion. In addition, the shorts and the like can be prevented from being contaminated, and can be sanitarily worn.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment showing a state in which an absorbing layer is located on the front side of a topsheet.

FIG. 2 is a plan view of the first embodiment showing a state in which a topsheet and a nonwoven fabric sheet are located on the surface of an absorption layer.

FIG. 3 is a plan view of the first embodiment showing a state where both sides of the absorbing layer are cut.

FIG. 4 is a plan view of the first embodiment showing a state in which lateral leakage prevention pieces are fixed to both sides of an absorption layer.

FIG. 5 is a plan view showing the front side of the finished product of the first embodiment.

FIG. 6 is a plan view showing the back side of the finished product of the first embodiment.

FIG. 7 is an enlarged end view taken along the line AA of FIG. 5;

FIG. 8 is an enlarged end view taken along line BB of FIG. 5;

FIG. 9 is an end view of the wing in a state of being attached to the shorts according to the first embodiment.

FIG. 10 is a plan view of the second embodiment showing a state in which a topsheet and a nonwoven fabric sheet are located on the surface of the topsheet.

FIG. 11 is a plan view of the second embodiment showing a state where both sides of the absorbing layer are cut.

FIG. 12 is a plan view of the second embodiment showing a state in which lateral leakage prevention pieces are fixed to both sides of an absorption layer.

FIG. 13 is a plan view of a completed product of the second embodiment.

FIG. 14 is an enlarged end view taken along line AA of FIG. 13;

FIG. 15 is an enlarged end view taken along line BB of FIG. 13;

FIG. 16 is an end view of a wing when a conventional napkin is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Absorption layer 11 Crack part 12 Leak-proof sheet 13 Surface sheet 14 Nonwoven fabric sheet 16 Wing part 18 Wing 19 Notch part 20 Sanitary napkin main body 22 Elastic body 23 Side leakage prevention piece

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-11140 (JP, A) JP-A-2-11137 (JP, A) JP-A-3-286760 (JP, A) JP-A-3-3 236838 (JP, A) JP-A-63-230164 (JP, A) Japanese Utility Model Application Laid-Open No. 1-69521 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61F 13/472 A61F 13 / 15

Claims (8)

(57) [Claims] 1. An outer perimeter of an absorbent layer interposed between a water-permeable top sheet and a water-impermeable leak-proof sheet with a body fluid-absorbing layer narrower than the top sheet and the leak-proof sheet. The flaps protrude, and a narrow crack portion is provided on a part of both sides in the length direction of the absorbent layer, and on both sides of the crack portion, a leakage prevention sheet is extended and protruded outward on both sides to form a shorts outer surface. A wing that can be folded back and fixed is projected, and both sides of the wing on the absorbent layer side are cut out in the direction of the absorbent layer to form notches, and elastic bodies are inserted between thermoplastic nonwoven fabrics at both sides of the absorbent layer. Fix the lateral leakage prevention piece, project the outer edge of this lateral leakage prevention piece outward from the notch of the wing, and urge the lateral leakage prevention piece in the contraction direction with the elastic body to stand on both sides of the absorbent layer. A sanitary napkin characterized by being raised. 2. The surface of a wing formed of a leak-proof sheet is covered with a non-woven sheet.
The sanitary napkin as described. 3. A side leakage prevention pieces, according to claim 1 or 2 sanitary napkin according to the nonwoven fabric sheet, characterized in that fixing the one formed separately on the surface sheet. 4. The side leakage preventing pieces, according to claim 1 or 2 sanitary napkin wherein it is formed by folding back the absorption layer side of the nonwoven fabric sheet. 5. An absorbent layer provided with narrow cracks on both sides in the length direction is placed on the surface of a water-impermeable leakproof sheet, and then a water-permeable topsheet is placed on the surface of the absorbent layer. By heating from the front side of the topsheet and heat-sealing the outer periphery of the absorbing layer integrally with the leak-proof sheet, the wings are formed by swelling outward on both sides of the cracked portion of the absorbing layer and heat-sealing. By forming both sides of the sanitary napkin body along the outside of the bulging heat seal part, the wings protrude on both sides of the crevice part and simultaneously cut both sides of the base of the wing to the absorbent layer side. After the notch is provided, the thermoplastic non-woven fabric is folded in two, and the side leakage prevention piece that sandwiches the elastic body in the bent part is located on the surface of the topsheet with the bent part located outside the notch. Position the side of the absorption layer A method for producing a sanitary napkin, characterized in that heat sealing is performed on a top sheet, and after the heat sealing, both ends in the length direction of the sanitary napkin main body are cut. 6. The surface of a wing formed of a leak-proof sheet is covered with a non-woven sheet.
A method for producing the sanitary napkin according to the above. 7. A side leakage prevention pieces, according to claim 5 or 6 production method of a sanitary napkin according to characterized in that fixing the one formed separately on the surface sheet is a nonwoven fabric sheet. 8. The horizontal leakage preventing piece sanitary method for manufacturing the napkin of claim 5 or 6, wherein it is formed by folding the absorbent layer side of the nonwoven fabric sheet.