JP2012095833A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article that prevents both side edges of a surface sheet from being peeled or removed when in use, while preventing discomfort or uncomfortable feeling from generated due to a hard portion on a surface in contact with skin.SOLUTION: The absorbent article 1 includes: a vertically long body 5 provided with a front surface sheet 2, a rear surface sheet 3 and an absorber 4; and wing parts 6, 6 which extend from both side edges. Each of the wing parts 6 is formed of a wing forming material 62 which is separate from the front surface sheet 2 and the rear surface sheet 3. One side edge of the wing forming material 62 which is located on the side of the body 5 is fixed between the front surface sheet 2 and the rear surface sheet 3. The other side edge extends outward from the side edges 21 and 31 of the front surface sheet 2 and the rear surface sheet 3. Fusion bonded parts 8 where the front surface sheet 2 and the wing forming materials 62 are bonded by fusion are continuously formed along the longitudinal direction of the body 5 and partially extend outward from the side edges 21 of the front surface sheet 2.

Description

  The present invention relates to an absorbent article such as a sanitary napkin, a panty liner (cage sheet), an incontinence pad, an interlabial pad, and the like, and particularly relates to an absorbent article for women having a wing portion.

In general, an absorbent article having a wing portion has a main body portion including a top sheet, a back sheet, and an absorbent body disposed between both sheets, and a pair of wing portions extending from both side edges of the main body portion. At the time of use, the pair of wings are bent to the back sheet side, and the bent wings are fixed to the non-skin facing surface of the crotch part of the shorts with an adhesive or the like.
Also, from the viewpoint of reducing the amount of sheet material used for the wing part, etc., as a method for manufacturing absorbent articles having a wing part, wing pieces are formed from a raw material different from the original material such as a top sheet and a back sheet. And the method of pinching the wing piece between the surface sheet and back surface sheet in a main-body part, and fixing to the both sides of a main-body part is proposed (refer patent document 1, 2).

When forming the wing part by fixing the wing piece to the main body part, the wing piece is used as a constituent material of the main body part so that the wing piece cannot be removed from the main body part even if the wing part is pulled when the absorbent article is used. It is desirable to bond firmly.
In order to firmly fix the wing piece, it is conceivable that the top sheet and the wing piece are fused with a wide width in the longitudinal direction of the main body portion by heat or ultrasonic waves.
However, in that case, a hard part is generated in the vicinity of the boundary between the wing part and the main body part, and it is easy to give a sense of discomfort and discomfort when the absorbent article is worn.
On the other hand, in the portion having the wing portion on the side in the longitudinal direction (side edge) of the absorbent article, when the surface sheet and the wing piece are not joined, the joining of the wing piece is weak and there is a fear of dropping off, When the absorbent article is bent in the longitudinal direction, floating and turning are generated at both side edges of the surface sheet, and the appearance is deteriorated or anxiety about leakage is given.

Patent Document 1 describes that the wing portion forming material and the surface sheet are joined by a plurality of weld joint portions that extend in the width direction of the main body portion and are provided at intervals in the longitudinal direction of the main body portion. Has been.
However, since the welded joint in Patent Document 1 is intermittently formed in the longitudinal direction of the main body, when it is formed on the side edge of the main body of the absorbent article, it overlaps with the position where it is folded back to the underwear, and is localized due to movement during use. There is a concern that the joint may be disengaged due to the deformation applied to the belt, and an easily deformable portion and a difficultly deformable portion are easily formed during use. Is formed. As a result, the adhesive on the back surface side tends to remain on the underwear side due to the unevenness formed by the welded joint formed in the wing region. Moreover, it is not formed in the position which can prevent the liquid bleeding from a surface material to a wing material.

Japanese Patent No. 3748015 Japanese Patent No. 4230480

  Therefore, the subject of this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention is an absorbent article having a top sheet, a back sheet, and a vertically long main body having an absorbent body disposed between both sheets, and a pair of wings extending from both side edges of the main body. The wing part is formed from a wing part forming material that is separate from the top sheet and the back sheet, and the wing part forming material has one side edge located on the main body part side on the top sheet. And the other side edge side is extended outward from the side edge of each of the top sheet and the back sheet, and the top sheet and the wing portion forming material are fused. Is formed continuously along the longitudinal direction of the main body, and the fusion processing part is partially outward from the position of the side edge of the topsheet. Providing extended absorbent articles A shall (hereinafter, when referred to as a first invention refers to the present invention).

  The present invention is an absorbent article having a top sheet, a back sheet, and a vertically long main body having an absorbent body disposed between both sheets, and a pair of wings extending from both side edges of the main body. The wing part is formed from a wing part forming material that is separate from the top sheet and the back sheet, and the wing part forming material has one side edge located on the main body part side on the top sheet. And the back side sheet, the other side edge side extending outward from the side edge of each of the top sheet and the back side sheet, and a main body part having a wing part in the longitudinal direction of the main body part In the width direction, a side edge of the top sheet is located inward of a side edge of the back sheet on the same left and right sides of the main body, and the top sheet and the wing portion forming material are fused. Processing An absorptive article is provided in which the fusion-bonded portion extended in the longitudinal direction of the main body portion while meandering alternately inward and outward in the width direction across the side edge of the topsheet. Yes (hereinafter referred to as the second invention).

According to the present invention (the first and second inventions), a hard portion is generated on the skin contact surface to prevent a sense of incongruity and discomfort, and the surface sheet is lifted and curled up on both side edges in use. Can be prevented.
Further, according to the first aspect of the present invention, the strength of deformation can be controlled by a continuous joint portion so as not to cause a large deformation with respect to a local force (deformation) applied to the wing at the time of use after wing folding. ) Deformation is suppressed to prevent a sense of incongruity. On the other hand, it is excellent in flexibility with respect to bending deformation in the longitudinal direction, and can prevent liquid bleeding from the top sheet to the wing member due to continuous joining.
Moreover, according to 2nd invention, the edge part of a surface sheet stands up between joining parts, and the touch improves.

FIG. 1 is a plan view of a sanitary napkin according to a first embodiment of the present invention as viewed from the surface sheet side. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a schematic enlarged plan view of a wing portion showing a joining mode between the top sheet and the wing portion forming material in the first embodiment. FIG. 4 is a plan view of a sanitary napkin according to a second embodiment of the present invention as viewed from the surface sheet side. FIG. 5 is a schematic enlarged plan view (corresponding to FIG. 3) of the wing portion showing a joining mode of the topsheet and the wing portion forming material in the second embodiment. FIG. 6: is the top view which looked at the sanitary napkin which is 3rd Embodiment of this invention from the surface sheet side. FIG. 7 is a schematic enlarged plan view (corresponding to FIG. 3) of the wing portion showing a joining mode of the topsheet and the wing portion forming material in the third embodiment. FIG. 8 is a schematic view showing still another embodiment of the present invention. FIG. 9 is a schematic view showing still another embodiment of the present invention. It is an enlarged plan view. FIG. 10 is a schematic diagram (corresponding to FIG. 3) showing still another embodiment of the present invention.

The present invention will be described below based on preferred embodiments with reference to the drawings.
A sanitary napkin 1 (hereinafter also referred to as a napkin 1) according to a first embodiment of the present invention (an embodiment of the first invention) includes a vertically long main body 5 and the main body as shown in FIGS. It has a pair of wing parts 6 and 6 extending from both side edges of the part 5.
The main body 5 has a shape that is long in the X direction in FIG. 1, and the main body 5 is fixed to the skin-facing surface of the crotch portion of the shorts (surface directed toward the wearer's skin) on the back surface thereof. A main body adhesive portion (not shown) is formed on the back surface of the wing portion 6, and each wing portion 6 is placed on the non-skin facing surface of the crotch portion of the shorts (on the side opposite to the wearer's skin side). The wing part adhesion part 61 for fixing to the (facing surface) is formed. The non-skin facing surface of the crotch part includes a lower layer side surface of a dual structure crotch part having an upper layer and a lower layer.

  As shown in FIG. 1, the main body 5 includes a central part A having wings 6 and 6 on both right and left sides, a front part B disposed on the stomach side of the wearer from the central part A when the napkin 1 is worn, and When the napkin 1 is worn, it has a rear portion C arranged on the back side of the wearer rather than the central portion A. When the napkin 1 is worn, the central part A of the main body part 5 is usually arranged opposite to the wearer's liquid discharge part (such as the vaginal opening).

As shown in FIG. 2, the main body 5 includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a liquid-retaining absorbent 4 disposed between the two sheets. .
The top sheet 2, the back sheet 3, and the absorber 4 all have a vertically long shape that is long in the longitudinal direction (X direction) of the main body 5.

  In the front part B and the rear part C of the main body part 5, the surface sheet 2 has a contour that matches the contour of the main body part 5, and in the central part A of the main body part 5, the front part B and the rear part C extends from the position of both side edges of the main body 5 to the outside in the width direction (Y direction) of the main body 5, and part of it extends into the wings 6 and 6. As shown in FIGS. 1 and 3, the side edge 21 of the topsheet 2 that has entered the wing part 6 extends along the longitudinal direction (X direction) of the main body part 5.

  The positions of both side edges 21 and 21 of the top sheet 2 in the central part A in the width direction (Y direction) of the main body part 5 are the same as the positions of both side edges of the top sheet 2 in the front part B and the back part C. However, as shown in FIGS. 1 to 3, the side edges 21, 21 of the top sheet 2 in the central part A have the main body part 5 depending on the positions of both side edges of the top sheet 2 in the front part B and the back part C. It is preferable from the point of the touch etc. that it is located outside the width direction (Y direction) of the wing part proximal end side (width direction of a main-body part) rather than the wing part adhesion part 61 in the protrusion direction of the wing part 6. It is more preferable that it is located on the center side.

  The back sheet 3 also has a contour that matches the contour of the main body portion 5 at the front portion B and the rear portion C of the main body portion 5, and the front portion B and the rear portion at the central portion A of the main body portion 5. C extends from the position of both side edges of the main body 5 to the outside in the width direction (Y direction) of the main body 5, and part of it extends into the wings 6 and 6. As shown in FIGS. 1 and 3, the side edge 31 of the back sheet 3 that has entered the wing part 6 extends along the longitudinal direction (X direction) of the main body part 5.

  In the central portion A, the side edges 31 and 31 of the back sheet 3 are positioned inwardly of the width direction (Y direction) of the main body 5 from the positions of the side edges 21 and 21 of the top sheet 2 (on the main body 5. Center side in the width direction) or may be in the same position as the side edges 21 and 21 of the topsheet 2, but as shown in FIGS. It is preferable from the point of the improvement of leak-proof property that the shape formation at the time of use by the folding | turning of a back surface sheet becomes easy, and it is located outside 21 each. Both side edges 31, 31 of the back sheet 3 are also in the width direction (Y direction) of the main body part 5, and the wing part base end side (the center side in the width direction of the main body part) rather than the wing part adhesive part 61 in the protruding direction of the wing part 6. ) Is more preferable.

As shown in FIG. 2, the pair of wing portions 6 in the napkin 1 is formed by a pair of wing portion forming members 62 that are separate from the top sheet 2 and the back sheet 3. The 63 side is fixed between the top sheet 2 and the back sheet 3, and the other side edge 64 side is outward from the side edge 21 of the top sheet 2 and the side edge 31 of the back sheet 3 (outward in the X direction). It is fixed and formed so as to extend.
More specifically, as shown in FIG. 1, the wing portion forming material 62 has an inner edge 63 disposed on the center side in the width direction of the main body portion 5 along the longitudinal direction (X direction) of the main body portion 5. The outer edge 64 has a linear shape that extends, and the outer edge 64 disposed on the outer side in the width direction of the main body 5 has a shape that matches the contour of the napkin 1.

As shown in FIG. 2, the wing portion forming material 62 has a predetermined width portion on the inner edge 63 side located on the main body portion 5 side on both sides of the top sheet 2, with the top sheet 2 facing upward. In the laminated portion, the topsheet 2 and the wing portion forming material 62 are fused to form a fused portion 81.
When the napkin 1 is manufactured, the fusion bonding portion 81 extends the belt-shaped original fabric of the topsheet 2 and the wing portion forming material 62 from the laminated portion thereof and one side edge of the strip-shaped raw fabric of the topsheet 2. Heat sealing or ultrasonic sealing (fusion processing) is performed so that a portion composed only of the wing portion forming material 62 is formed and straddles both the laminated portion and a portion composed only of the wing portion forming material 62. It is formed by giving.

This fusion process is a process of melting and solidifying the synthetic resin contained in the topsheet 2 and / or the wing part forming material 62 to form a fused part 81 in which both are fused, and at the same time, the wing part forming material. The surface sheet 2 is applied to a portion of the wing portion 62 that is not laminated to form a concave portion and a consolidated portion in the wing portion forming material 62. Hereinafter, a concave portion, a consolidated portion, and the like, which are generated by applying the fusion processing to a portion of the wing portion forming material 62 where the topsheet 2 is not laminated, are referred to as a wing seal portion 82 for convenience.
In the fusion-bonded portion in the present invention, a fused portion 81 in which both of the surface sheet 2 and the wing portion forming material 62 overlap is formed with the surface sheet 2 of the wing portion forming material 62. A wing seal portion 82 is formed in the non-overlapping portion.
As the wing portion forming material 62, as described later, a single layer or multilayer nonwoven fabric, or a laminate of a nonwoven fabric and a resin film can be preferably used, but the wing seal portion 82 in the case of using these is preferable. For example, a portion where the constituent fibers of the nonwoven fabric are fused by pressurization and heating by fusion processing, a portion where the density of the nonwoven fabric is higher than other portions by pressure and heating by fusion processing, The part etc. which the thickness of the nonwoven fabric decreased from the other part by the pressurization and heating by dressing process are mentioned. These may be portions where two or more of these are generated in a composite manner.

In the napkin 1 according to the first embodiment, as shown in FIGS. 1 and 3, the fusing part 8 subjected to this fusing process meanders along the longitudinal direction (X direction) of the main body part 5 while meandering. It is formed in an extending pattern.
More specifically, as shown in FIG. 3, the fusion processing portion 8 has an inner edge 8 a that is continuously inward from the position P <b> 21 of the side edge 21 of the surface sheet (see FIG. 3). The other side edge 8b is continuously located on the outer side (G side in the figure) from the position P21 of the side edge 21 of the topsheet 2.

As a result, as shown in FIG. 3, the fused portion 81 in which the wing portion forming material 62 and the topsheet 2 are fused inward (N side in the drawing) from the position P <b> 21 of the side edge 21 of the topsheet. The wing seal portion 82 is formed continuously along the longitudinal direction (X direction) of the main body portion 5 and outward (G side in the figure) from the position P21 of the side edge 21 of the topsheet. It is continuously formed along the longitudinal direction (X direction) of the part 5. In FIG. 3, P21 is a straight line indicating the position of the side edge 21 of the topsheet. Of the fusion-bonded portion 8 shown in FIG. 3, the N side from the straight line P21 is the fused portion 81, and the G side from the straight line P21 is the wing seal. Part 82.
As shown in FIG. 1, the fusion processing portion 8 of the napkin 1 is formed in the vicinity of the base end of the wing portion 6 of the napkin 1, and the front end edge 65 and the rear edge of the wing portion 6 in the X direction are formed. It extends between the edge 66.

  According to the napkin 1 of the first embodiment, the fusion-bonded portion 8 extends along the longitudinal direction of the main body portion 5 while meandering, and the surface sheet 2 and the wing portion forming material 62 are fused. Since the attaching part 81 is continuously formed along the longitudinal direction of the main body part 5, the tensile force in the width direction of the napkin 1 applied when the wing part 6 is folded, in various directions after being fixed to the underwear Even if it is the force (mainly shearing force) etc., a side edge part of the surface sheet 2 is hard to raise | lift and turn up. Therefore, it is possible to prevent the appearance of the napkin 1 from being deteriorated when the side edge portion of the topsheet 2 is lifted or turned up, or giving the user anxiety about leakage.

  Moreover, since the fusion-bonded portion 8 partially extends outward from the position P21 of the side edge of the topsheet 2 to form the wing seal portion 82, the end portion of the topsheet 2 is joined. The bending flexibility in the longitudinal direction is improved while the height of the napkin 1 is increased, and the fit of the napkin 1 is improved. In addition, regarding the folding at the crotch portion of the underwear, even when the fusion portion 81 straddles the curved shape of the crotch portion, it is gently folded back by the concave shape of the wing seal portion 82 (a fold line is hardly formed). In addition, the loop-like bend caused by folding back is larger toward the wing side end side (the curvature radius is smaller toward the tip side), so that the floating and turning of the side edge of the topsheet 2 are suppressed, and the wing Fixing to adhesive underwear and wearing feeling of shorts are also improved.

  In the first embodiment, the wing seal portion 82 formed outward from the position P21 of the side edge of the topsheet 2 also has a portion that continuously extends along the longitudinal direction of the main body portion 5. The looped folds are easily formed stably and the feeling of wearing is improved.

In the napkin 1 of the first embodiment, it is preferable that the fusion processing portion 8 has a full width W8 (see FIG. 3) of 3 to 30 mm, particularly 5 to 15 mm, from the viewpoint of securing fixed strength. Further, the meandering pitch P8 (see FIG. 3) may be larger, smaller or equal to the full width W8. The ratio (P8 / W8) of the meandering pitch P8 and the full width W8 can be set to 0.1 to 60, for example, and preferably 1 to 25.
In addition, the meandering width L8a (see FIG. 3) of the side edge 8a on the fused portion 81 side of the fused portion 8 is 5 to 95%, particularly 20 to 80%, of the total width W8 of the fused portion 8. The meandering width L8b (see FIG. 3) of the side edge 8b on the wing seal portion 82 side of the fusion-bonded portion 8 is 5 to 95%, particularly 20 to 80%, of the total width W8 of the fusion-bonded portion 8. It is preferable.

  Further, the fusion-bonded portion 8 extending along the longitudinal direction of the main body while meandering has an area of a portion (fused portion) 81 formed inward from the side edge 21 of the surface sheet 2. It is larger than the area of a portion (wing seal portion) 82 formed outward from the edge 21. That is, the area of the fused part 81 formed inward is larger than the area of the fused part (wing seal part) 82 formed outward. Therefore, the pressing of the area where the wing material and the surface sheet overlap can be easily controlled and can have a stable strength, and the excessive pressing by the outer area can be prevented. It is possible to prevent floating and tearing at the wing bonding portion. From this point of view, the area of the fused part 81 is 60 to 90%, particularly 70 to 85% of the total area of the fused part 8 (total area of the fused part 81 and the wing seal part 82). It is preferable.

  Further, the fusion-bonded portion 8 extending along the longitudinal direction of the main body while meandering has a width W81 (FIG. 3) of a portion (fused portion) 81 formed inward from the side edge 21 of the topsheet 2. Is preferably larger than the width W82 (see FIG. 3) of a portion (wing seal portion) 82 formed outward from the side edge 21. However, the width W81 can be the same as or smaller than the width W82.

  As shown in FIG. 2, the wing portion forming material 62 in the region of the fusion processing portion 8 in the napkin 1 of the present embodiment is bonded to the back sheet 3 by a hot melt adhesive by a slot spray method or a spiral method. (Not shown). Further, the end portion of the wing portion forming material 62 in the longitudinal direction is joined (fused) by the peripheral seal portion 11.

  On the other hand, on the side edge side from the region of the fusion-bonded portion 8, since it is folded back during use and sandwiched between the underwear and the wing portion forming material 62, it does not have to be fixed. From the viewpoint of operability at the time of mounting on the wing portion, it is preferable that the wing portion forming material 62 and the back sheet are fixed (joined) by the hot-melt adhesive or the dot-like heat sealing method by the coating method described above. .

In the napkin 1, as shown in FIG. 2, the wing portion forming material 62 and the back sheet 3 are continuously disposed on the outer sides of the side edges 41 of the absorbent body 4 via the hot melt adhesive 71. A belt-like joint portion 7 joined to each other is formed so as to extend in the longitudinal direction (X direction) of the main body portion 5.
That is, the hot melt type adhesive 71 is continuously arranged along the longitudinal direction of the main body part 5, and the wing part forming material 62 and the back sheet 3 are joined by the hot melt type adhesive 71. A pair of belt-like joint portions 7 and 7 extending along the longitudinal direction of the main body 5 is formed on both sides of the main body 5.
It is preferable that the strip-shaped joint portion 7 in the napkin 1 is formed on the inner side from the position of the folding line P when the main body portion 5, more specifically, the wing portion 6 is fixed to the shorts. Moreover, it is preferable that the strip | belt-shaped junction part 7 is not extended outside from the position of the wing part 6, especially the bending line P. FIG.

Due to the presence of the belt-like joint portion 7 using the hot melt adhesive 71, the liquid (such as menstrual blood) absorbed by the absorbent body 4 is between the wing portion forming material 62 and the back sheet 3 or the wing portion forming material. It is effectively prevented from oozing out through the skin, thereby preventing the underwear and skin from being contaminated by the leaked liquid.
In addition, when the top sheet 2 is joined to the wing part forming material 62 and then the wing part forming material 62 is joined to the back sheet 3 in the vicinity of the side edge 41 of the absorber 4 by heat sealing, the back sheet 3 has a drawback that it is easily broken, but by joining with the hot-melt adhesive 71, the backsheet 3 can be prevented from being broken even in such a case.

  In addition, in the center part A of the main-body part 5, the distance L1 between the strip | belt-shaped joining part 7 (hot-melt-type adhesive 71) and the side edge 41 of the absorber 4 is good joining strength (peeling strength) and wing part. From the viewpoint of operability (flexibility), the thickness is preferably 7 mm or less, more preferably 1 to 6 mm, and further preferably 2 to 5 mm, in view of good liquid leakage prevention.

  From the viewpoint of preventing liquid from bleeding due to disappearance of gaps between the materials, the width W (see FIG. 2) of the hot-melt adhesive 71 forming the band-like joint portion 7 is preferably 1 mm or more, more preferably. It is 2 mm or more, more preferably 4 mm or more. On the other hand, from the viewpoint of good wing operability (flexibility), the width W of the hot-melt adhesive 71 is preferably 7 mm or less, and more preferably 5 mm or less.

In addition, from the viewpoint of preventing the liquid from bleeding due to the stability of bonding, the coating basis weight of the hot-melt adhesive 71 that forms the band-shaped bonding portion 7 is preferably 15 g / m ² , more preferably 20 g / m ^2. m ² or more, more preferably 25 g / m ² or more. On the other hand, from the viewpoint of suppressing a sense of incongruity due to rigidity and uplift, the coating basis weight of the hot-melt adhesive 71 is preferably 50 g / m ² or less, and more preferably 35 g / m ² or less.

  Further, from the viewpoint of preventing the liquid from oozing out, it is preferable that the belt-like joint portion 7 extends over the entire length of the wing portion 6 (the total length in the X direction) in the longitudinal direction of the main body portion 5 as shown in FIG. . It is more preferable that the belt-like joint portion 7 extends from the front portion B to the rear portion C beyond the length of the wing portion 6. The total length L7 of the belt-like joint portion 7 can be, for example, 90 to 150% of the length L6 of the wing portion 6, and more preferably 95 to 120% of the length L6 of the wing portion 6.

Moreover, as shown in FIG. 1, the napkin 1 of this embodiment WHEREIN: Between the back surface sheet 3, the wing part formation material 62, and / or the surface sheet 2 was joined to the peripheral part by hot embossing. A peripheral seal portion 11 is provided.
As shown in FIG. 1, the fusion processing portion 8, the fusion portion 81, and the wing seal portion 82 described above have both ends in the X direction reaching the peripheral seal portion 11.

  Moreover, in this napkin 1, as shown in FIG. 1, the leak-proof groove 9 formed by compressing the top sheet 2 and the absorber 4 integrally by heat embossing in the center part A of the main-body part 5. As shown in FIG. Is formed.

Next, a sanitary napkin 1A (hereinafter also referred to as napkin 1A) which is a second embodiment of the present invention (one embodiment of the first invention) will be described with reference to FIGS.
About napkin 1A of 2nd Embodiment, it demonstrates mainly about the difference with the napkin 1 of 1st Embodiment, and abbreviate | omits description about the same point. The points that are not particularly described are the same as those of the first embodiment, and the above description of the first embodiment is appropriately applied. In FIG.4 and FIG.5, the same code | symbol is attached | subjected to the component etc. similar to the component etc. of the napkin of 1st Embodiment.

Also in the napkin 1A in the second embodiment, as in the napkin 1 in the first embodiment, the fusion-bonded portion 8 subjected to the fusion-bonding process follows the longitudinal direction (X direction) of the main body 5 while meandering. It is formed in a pattern that extends.
However, the fusion processing portion 8 of the napkin 1A of the second embodiment is different from the napkin 1 of the first embodiment in the formation position of the fusion processing portion 8 in relation to the position P21 of the side edge 21 of the topsheet 2. .
That is, as shown in FIG. 5, the fusion processing portion 8 in the napkin 1 </ b> A of the second embodiment has a position P <b> 21 of the side edge 21 of the topsheet in which the one side edge 8 a of the main body portion 5 in the width direction center side is continuous. The other side edge 8b meanders so as to be alternately positioned on both sides of the position P21 of the side edge 21 of the topsheet 2 while being located more inward (N side in the figure). Yes.
As a result, as shown in FIG. 5, a fused portion 81 in which the wing portion forming material 62 and the topsheet 2 are fused inward (N side in the drawing) from the position P21 of the side edge 21 of the topsheet. Is formed continuously along the longitudinal direction (X direction) of the main body 5, and a wing seal portion 82 is provided outward (G side in the drawing) from the position P 21 of the side edge 21 of the topsheet. It occurs intermittently along the longitudinal direction (X direction) of the main body 5.

  Further, the fusion processing portion 8 of the napkin 1A according to the second embodiment has a total width 8 (see FIG. 5) slightly narrower than the fusion processing portion according to the first embodiment, and one side of the fusion processing portion 81 side. The total of the meandering width L8a of the edge 8a and the meandering width L8b of the other side edge 8b is equal to or greater than the total width W8 of the fusion-bonded portion 8.

  According to the napkin 1A of the second embodiment, the fusion-bonding portion 8 of the fusion-bonding process extends along the longitudinal direction of the main body portion 5 while meandering, and the topsheet 2 and the wing portion forming material 62 are fused. Since the fused part 81 is continuously formed along the longitudinal direction of the main body part 5, as with the napkin 1 of the first embodiment, floating and turning are formed at the side edge part of the topsheet 2. Hard to occur. Therefore, it is possible to prevent the appearance of the napkin 1 </ b> A from deteriorating when the side edge of the top sheet 2 is lifted or turned up, or giving the user anxiety about leakage.

  Moreover, since the fusion-bonded portion 8 partially extends outward from the position P21 of the side edge of the topsheet 2 to form the wing seal portion 82, the end portion of the topsheet 2 is joined. The bending flexibility in the longitudinal direction is improved while the height of the napkin 1A is improved. Further, like the napkin 1, the side edge of the topsheet 2 is prevented from being lifted or turned up, and the fixing property to the underwear of the wing adhesive and the wearing feeling of the shorts are improved.

In the second embodiment, since the wing seal portion 82 formed outward from the position P21 of the side edge of the topsheet 2 is intermittently generated along the longitudinal direction of the main body portion 5, the embodiment 1 has the same effect.
In the second embodiment, as shown in FIG. 5, the side edge 21 of the top sheet 2 is fused to the wing portion forming material 62 by the fused portion 81 and the fused portion 81 to the wing. The portions 23 that are not fused to the portion forming material 62 are alternately formed along the longitudinal direction of the main body portion 5. Therefore, since the edge part of a surface sheet stands up between joining parts, possibility that the fusion processing part 8 will touch skin directly is reduced, and the touch in use (especially in wing folding shape) improves.
In the side edge 21 of the topsheet 2, the length in the X direction of the portion 22 fused to the wing portion forming material 62 by the fused portion 81 and the portion not fused to the wing portion forming material 62 by the fused portion 81 The length ratio (the former / the latter) of 23 in the same direction (X direction) is preferably 0.5 to 5, particularly 1 to 3.

  The portion 23 that is not fused to the wing portion forming material 62 by the fused portion 81 is fixed to the wing portion forming material 62 by a hot-melt adhesive, and is individually packaged (in particular, the wing member is a surface sheet). The operability in a state of being folded to the side is improved, and the fixing to the wing portion forming material 62 may be formed by dot-like embossing with an area having a circle-equivalent diameter of about 0.5 to 1 mm.

Next, a sanitary napkin 1B (hereinafter also referred to as napkin 1B), which is a third embodiment (one embodiment of the second invention) of the present invention, will be described with reference to FIGS.
Regarding the napkin 1B of the third embodiment, differences from the napkin 1 of the first embodiment will be mainly described, and description of similar points will be omitted. The points that are not particularly described are the same as those of the first embodiment, and the above description of the first embodiment is appropriately applied. 6 and 7, the same reference numerals are given to the same components as the components of the napkin of the first embodiment.

  Also in the napkin 1B in the third embodiment, as shown in FIGS. 6 and 7, in the body portion width direction (Y direction) of the region (center portion A) having the wing portions 6 and 6 in the longitudinal direction of the body portion 5. The side edge 21 of the top sheet 2 is located inward (the center in the width direction of the main body, leftward in FIG. 7) than the side edge 31 of the back sheet 3 on the same left and right side of the main body. .

Also in the napkin 1B in the third embodiment, as in the napkin 1 of the first embodiment, the fusion-bonded portion 8 subjected to the fusion-bonding process follows the longitudinal direction (X direction) of the main body portion 5 while meandering. It is formed in a pattern that extends.
However, the fusion processing portion 8 of the napkin 1B of the third embodiment is different from the napkin 1 of the first embodiment in the formation position of the fusion processing portion 8 in relation to the position P21 of the side edge 21 of the topsheet 2. .
As shown in FIG. 7, the fusion processing portion 8 in the napkin 1 </ b> B of the third embodiment is such that both the one side edge 8 a and the other side edge 8 b of the main body portion 5 are on the side of the topsheet 2. It snakes so as to be alternately located on both sides of the position P21 of the edge 21.
That is, in the third embodiment, the fusion processing portion 8 of the fusion processing is such that the entire width parallel to the width direction (Y direction) of the main body portion 5 is within the position P21 of the side edge 21 of the topsheet 2. Portion 81 and the portion 82 whose entire width is located outward from the position P21 of the side edge 21 of the topsheet alternately in the longitudinal direction (X direction) of the main body portion. is doing. Here, the “whole width” of the fusion-bonded portion 8 is different from the full width W8 of the fusion-bonded portion 8 in consideration of swinging as shown in FIG. This is the width of the fusion-bonded portion 8 measured.

  Accordingly, in the third embodiment, as shown in FIG. 7, the wing portion forming material 62 and the topsheet 2 are melted inwardly from the position P21 of the side edge 21 of the topsheet (N side in the drawing). The fused part 81 is intermittently generated along the longitudinal direction (X direction) of the main body part 5, and is outward (G side in the figure) from the position P21 of the side edge 21 of the topsheet. The wing seal portion 82 is intermittently generated along the longitudinal direction (X direction) of the main body portion 5.

  Further, the fusion processing portion 8 of the napkin 1B of the third embodiment has a full width 8 (see FIG. 7) that is substantially the same as the fusion processing portion of the first embodiment. The meandering width L8a of the side edge 8a and the meandering width L8b of the other side edge 8b are larger than the corresponding meandering width of the fusion-bonded portion of the first embodiment. Further, in the fusion processing portion 8 of the napkin 1B of the third embodiment, the total of the meandering width L8a and the meandering width L8b is larger than the total width W8 of the fusion processing portion 8.

  According to the napkin 1B of the third embodiment, the side edge 21 of the top sheet is inward of the side edge 31 of the back sheet in the main body width direction (Y direction) of the region having the wing part (center A). The napkin is positioned, and the fusing portion 8 extends in the longitudinal direction of the main body 5 while meandering alternately inward and outward in the width direction across the side edge 21 of the topsheet. A flexible wing portion can be easily obtained because it has a relatively few fusion-bonded portions with sufficient strength against the pulling force in the width direction when 1A is mounted.

  In addition, since the fusion-bonded portion 8 of the fusion-bonding process is formed at a predetermined pitch along the longitudinal direction of the main body portion 5 in the vicinity of the side edge 21 of the topsheet 2, the side edge portion of the topsheet 2 In addition, the napkin is less likely to float or turn over, which may cause the appearance of the napkin to deteriorate or give anxiety about leakage.

  Moreover, since the fusion-bonded portion 8 partially extends outward from the position P21 of the side edge of the topsheet 2 to form the wing seal portion 82, the end portion of the topsheet 2 is joined. The bending flexibility in the longitudinal direction is improved while the height of the napkin 1B is improved. Further, like the napkin 1, the side edge of the topsheet 2 is prevented from being lifted or turned up, and the fixing property to the underwear of the wing adhesive and the wearing feeling of the shorts are improved.

  In the third embodiment, since the wing seal portion 82 formed outward from the position P21 of the side edge of the topsheet 2 is intermittently generated along the longitudinal direction of the main body portion 5, the first And the effect similar to 2nd Embodiment is show | played. Furthermore, by improving the strength of the boundary between the surface sheet 2 and the wing portion forming material 62 and separating from the side edge portion of the surface sheet, it is easy to suppress bleeding and prevent leakage.

  Further, since the fusion part 81 formed inward from the position P21 of the side edge of the top sheet 2 is intermittently generated along the longitudinal direction of the main body part 5, the fusion part 81 is fused to the side edge of the top sheet 2. The protrusion (separation) from the wing portion forming material 62 by the portion 23 not fused to the wing portion forming material 62 by the wearing portion 81 is more likely to occur than in the second embodiment, and the touch during use is good.

  In the napkin 1 </ b> B of the third embodiment, the length in the X direction of the portion 22 fused to the wing portion forming material 62 by the fused portion 81 at the side edge 21 of the topsheet 2 and the wing portion formed by the fused portion 81. The length ratio (the former / the latter) in the same direction (X direction) of the portion 23 not fused to the material 62 is preferably 0.1 to 1, and particularly preferably 0.3 to 0.8.

  The portion 23 that is not fused to the wing portion forming material 62 by the fused portion 81 is fixed to the wing portion forming material 62 by a hot melt adhesive, as in the first and second embodiments. Form (especially the operability in the state where the wing member is folded to the surface sheet side is improved. The fixing to the wing portion forming material 62 is formed by dot-like embossing having an equivalent circle diameter of about 0.5 to 1 mm. May be.

In the napkin 1B of the third embodiment, it is preferable that the fusion processing portion 8 has a total width W8 (see FIG. 3) of 3 to 30 mm, particularly 5 to 15 mm, from the viewpoint of securing fixed strength. Further, the meandering pitch P8 (see FIG. 3) may be larger, smaller or equal to the full width W8, but is preferably equal to or smaller than the full width W8 and smaller than the full width W8. It is more preferable. The ratio (P8 / W8) of the meandering pitch P8 to the full width 8 is preferably 0.1 to 0.9, and more preferably 0.2 to 0.7.
Further, the meandering width L8a (see FIG. 3) of the side edge 8a on the fusion bonded portion 81 side of the fusion bonded portion 8 is 5 to 95%, particularly 30 to 80% of the total width W8 of the fusion bonded portion 8. The meandering width L8b (see FIG. 3) of the side edge 8b on the wing seal portion 82 side of the fused portion 8 is 5 to 95%, particularly 30 to 80%, of the total width W8 of the fused portion 8. It is preferable.

  The napkins 1, 1 </ b> A, 1 </ b> B can be manufactured by any method that can be considered by those skilled in the art. For example, the left and right wing portion forming members 62 are cut out from a single belt-like sheet, and the wings thereof are cut. After the part forming material 62 is joined to both sides of the belt-like original fabric of the surface sheet 2 by heat sealing or ultrasonic sealing, the absorbent body 4 is placed on the composite sheet and passed between the embossing rolls, and the leakage preventing groove 9 Can be manufactured by laminating the strip-shaped original fabric of the back sheet 3 coated with the hot-melt adhesive 71, and applying pressure and sealing the peripheral edge. The hot-melt adhesive 71 can be applied to the belt-like raw fabric side of the top sheet 2, and the belt-like raw material of the back sheet 3 to which the hot-melt adhesive 71 is not applied can be overlapped and bonded. .

The formation material of each part of napkin 1, 1A, 1B mentioned above is demonstrated.
As the top sheet 2, the back sheet 3, and the absorbent body 4, various materials conventionally used in absorbent articles such as sanitary napkins can be used without particular limitation.
For example, as the surface sheet 2, a single layer or multilayer nonwoven fabric, an apertured film, or the like can be used. As the back sheet 3, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. As the absorbent body 4, an aggregate of fibers such as pulp fibers (which may be a nonwoven fabric) or an absorbent core in which water-absorbing polymer particles are held therein is used as a core wrap made of water-permeable thin paper or nonwoven fabric. Those coated with a sheet, various known polymer sheets, and the like can be used.

  As the wing part forming material 62, a single layer or multilayer nonwoven fabric, a laminate of the nonwoven fabric and a resin film, or the like can be used. Examples of the single layer nonwoven fabric include a spunbond nonwoven fabric and an air-through nonwoven fabric. Examples of the multilayer nonwoven fabric include a spunbond-meltblown composite nonwoven fabric (SM, SMS), a composite sheet of an air-through nonwoven fabric and a spunbond nonwoven fabric, and air-through. A composite sheet of a nonwoven fabric and a spunbond-melt blow composite nonwoven fabric may be used. Between the nonwoven fabric and the resin film in the laminate of the nonwoven fabric and the resin film, the melted resin may be applied to the film and then solidified, or may be integrated through an adhesive such as a hot-melt adhesive. May be joined.

  The hot-melt adhesive 71 for forming the band-like joint 7 includes a styrene-butadiene-based or styrene-isoprene-based polymer component having elasticity, and low tack with little tackiness at room temperature (equivalent to body temperature). However, it is preferable to have an elastic resin composition from the viewpoint of followability in movement, and among them, an adhesive having tackiness is preferable from the viewpoint of maintaining bonding.

  Moreover, in the absorbent article of this invention, it is preferable to join between the absorber 4 and the back surface sheet 3 in the main-body part 5 with an adhesive agent. However, this adhesive is preferably applied at a lower basis weight than a pattern application such as a spiral pattern or a hot-melt adhesive 71 that forms the band-like joint 7.

The present invention is not limited to the several embodiments described above, and can be modified as appropriate without departing from the spirit of the present invention.
For example, the meandering fusion processing portion 8 is formed in a zigzag shape like the fusion processing portion 8 shown in FIG. 8 instead of the fusion processing portion meandering in a continuous wave shape, or shown in FIG. Like the fusion processing part 8, the horizontal part extending in the Y direction and the vertical part extending in the X direction may be alternately connected.

  Further, the fusion-bonded portion 8 may be formed in a manner as shown in FIG. 10 in relation to the side edge 21 of the topsheet 2. In FIG. 10, the N side is the inward side (main body part side) from the position P21 of the side edge 21 of the topsheet, and the G side is the outside side (the tip of the wing part) from the position P21 of the side edge 21 of the topsheet Side). Further, the inner side (N side) of the fusion processing part from the position P21 is a fusion part 81 in which the topsheet 2 and the wing part forming material 62 are fused, and the outer side (from the position P21) ( G side) is the wing seal portion 82. That is, the fusion-bonded portion 8 is formed in a comb shape, and the tip end portion of the portion 82A corresponding to the pin (teeth) of the comb is formed outside the side edge of the topsheet.

  Further, the wing portion forming material 62 is replaced with the wing portion forming material 62 at the fusion bonding portion 81 and / or the wing seal portion 82 instead of being bonded to the back sheet 3 by fusing at the fusing portion 8. It may be joined to the back sheet 3 by the same hot-melt adhesive 71 as that of the belt-like joining portion 7.

In addition, the wing part is not limited to what is fixed to the shorts through the adhesive part, but from what is fixed to the shorts using an engagement part made of a male member of a mechanical surface fastener, from the adhesive part or the mechanical surface fastener. What connects and fixes wing parts through the engaging part which becomes may be used. In addition to the sanitary napkin, the absorbent article of the present invention may be a panty liner (origami sheet), an incontinence pad, or the like.
Moreover, as the surface sheet 2, a composite sheet having a structure in which a side sheet made of a water-repellent nonwoven fabric is connected to each of both sides of the liquid-permeable central sheet instead of the liquid-permeable center sheet.

In addition, the description omitted in one embodiment and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately applied between the embodiments. Can be substituted for each other.
For example, the modifications and preferred embodiments described in the description of the first embodiment can be applied to the second embodiment, the third embodiment, or the embodiment shown in FIG. Moreover, the form of the melt | fusion process part in 1st-3rd embodiment can also be made into the form shown to FIG. The distance can be appropriately expanded or reduced as shown in FIG.

1,1A, 1B Sanitary napkin (absorbent article)
2 Top sheet 21 Side edge 3 Back sheet 31 Side edge 4 Absorber 5 Main body part 6 Wing part 61 Wing part adhesive part 62 Wing part forming material 7 Band-shaped joint part 71 Hot melt adhesive 8 Fusing part 81 Fusing part 82 Wing seal part A Center part (part with wing part on the left and right)
B Front part C Rear part

Claims (6)

An absorbent article having a top sheet, a back sheet and a vertically long main body comprising an absorbent body disposed between both sheets, and a pair of wings extending from both side edges of the main body,
The wing part is formed from a wing part forming material separate from the top sheet and the back sheet,
The wing part forming material has one side edge located on the main body part side fixed between the top sheet and the back sheet, and the other side edge is outward from the side edges of the top sheet and the back sheet. Extending to
A fusion-bonded portion subjected to a process of fusing the topsheet and the wing portion forming material is continuously formed along the longitudinal direction of the main body portion, and the fusion-bonded portion is a partial In particular, the absorbent article extends outward from the position of the side edge of the topsheet.   The absorptivity according to claim 1, wherein the fusion-bonded portion is formed along the longitudinal direction of the main body while meandering alternately inward and outward in the width direction across the side edge of the topsheet. Goods.   The fusion-bonded portion formed along the longitudinal direction of the main body portion while meandering alternately in the width direction inward and outward across the side edge of the surface sheet, The absorbent article according to claim 2, wherein an area of a portion formed on the side is formed larger than an area of a portion formed outward from the side edge. An absorbent article having a top sheet, a back sheet and a vertically long main body comprising an absorbent body disposed between both sheets, and a pair of wings extending from both side edges of the main body,
The wing part is formed from a wing part forming material separate from the top sheet and the back sheet,
The wing part forming material has one side edge located on the main body part side fixed between the top sheet and the back sheet, and the other side edge is outward from the side edges of the top sheet and the back sheet. Extending to
In the width direction of the main body portion of the region having the wing portion in the longitudinal direction of the main body portion, the side edge of the top sheet is positioned inward from the side edges of the back sheet on the same left and right sides of the main body portion. ,
The fuselage processed portion subjected to the process of fusing the topsheet and the wing portion forming material meanders alternately in the width direction inward and outward across the side edge of the topsheet, An absorbent article extending in the longitudinal direction of the part.   A band-shaped joint portion in which the wing portion forming material and the back sheet are continuously joined to each other on both sides of the absorbent body via a hot melt adhesive extends in the longitudinal direction of the main body portion. The absorptive article according to any one of claims 1 to 4 currently formed.   The absorbent article according to claim 1, wherein the fusion-bonded portion is formed in a comb shape, and a portion corresponding to a pin of the comb extends outward across the side edge of the topsheet.

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