JP6141008B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article, and in particular, to an absorbent article having a hip flap portion.

  In general, an absorbent article such as a sanitary napkin is provided with a liquid-permeable surface layer, a liquid-impermeable back layer, and an absorbent body disposed therebetween, thereby allowing body fluids such as menstrual blood to flow. Absorb and retain. In addition, in order to prevent bodily fluids such as menstrual blood from leaking around the absorbent article and adhering to the wearer's clothing, a side flap portion extending from the main body portion including the absorbent body to the outside in the width direction is provided. Absorbent articles are known.

  The side flap portion of the absorbent article is folded and fixed to the non-skin contact surface side of the wearer's underwear, and is disposed behind the wing portion, and is disposed on the skin contact surface of the wearer's underwear. A hip flap portion to be fixed. A wing part and a hip flap part are fixed to a wearer's underwear via the adhesion part arrange | positioned at each back surface.

  Since the side flap portion is lower in rigidity than the main body portion provided with the absorber, the hip flap portion that comes into contact with the wearer's skin during use is liable to bend and the outer edge is liable to bend. If the hip flap part is twisted or twisted over the part where the adhesive part is disposed on the back surface, the adhesive part may be peeled off from the wearer's underwear. As a result, the fixation to the underwear of the side flap portion becomes insufficient, and body fluid such as menstrual blood may leak and adhere to the wearer's underwear.

  Patent Document 1 discloses a sanitary napkin in which a linear portion extending in the front-rear direction is provided on the outer edge of the hip flap portion. By making the outer edge of the part where the width of the hip flap part becomes the maximum linear, a rectangular adhesive part is arranged at the outer end part of the hip flap part, and the area of the adhesive part is secured large, and the hip flap part The fixed state has been improved.

JP 2009-118877 A

  By the way, if the wearer of an absorbent article closes a leg, force will be applied toward the inner side from the width direction outer side of a wing part. At this time, a force is applied from the wing part toward the rear, and a force is applied to the hip flap part located behind the wing part. The sanitary napkin described in Patent Document 1 does not determine the position of the adhesive portion in consideration of the force applied during use, but spreads throughout the hip flap portion due to the force transmitted from the wing portion. There is a risk of peeling off the part.

  This invention is made | formed in view of the above-mentioned subject, and aims at provision of the absorbent article which improved the fixed state of the hip flap part.

  In order to solve the above-described problems, the present invention has the following features. A first feature of the present invention is that in an absorbent article (absorbent article 1) having a front-rear direction (front-rear direction L) and a width direction (width direction W) orthogonal to the front-rear direction, an absorbent body (absorber) 4) from a central area (central area CA) including the center of the main body (main body M) and the excretory opening contact area (excretion opening contact area C) disposed opposite to the wearer's excretion opening. And a hip flap part (hip flap part HF) protruding outward in the width direction from the width direction outer edge of the main body part, and at least a part of the outer edge of the absorbent article is an outer edge of the absorbent article Has an outer edge compressed part (seal part 10) compressed in the thickness direction, and the hip flap part is provided with a side adhesive part (hip flap part displacement preventing material 8) on the non-skin contact surface side, and the hip flap The first neck portion (first neck portion 31) and A first flap portion (first flap portion 41) that is located rearward of the first constricted portion, protrudes outward in the width direction from the first constricted portion, and includes a portion where the width of the hip flap portion is maximum. ) And a second flap portion (second flap portion 42) that is positioned forward of the first constriction portion and protrudes outward in the width direction from the first constriction portion, of the second flap portion The gist is that the outer edge squeezing part is arranged on the outer edge, and the side adhesive part is arranged on the non-skin contact surface side of the first flap part.

  According to this feature, the first constricted portion is located in front of the first flap portion that protrudes most outward in the width direction in the hip flap portion, and the second flap portion is located in front of the first constricted portion. When the wearer of the absorbent article closes the leg, a force is applied from the outside in the width direction of the central region to the inside, and the force is transmitted backward. The force transmitted to the hip flap part deforms the second flap part, but is absorbed by the first constriction part, and the force applied to the first flap part behind the first constriction part is reduced.

  Moreover, an outer edge pressing part is arrange | positioned at the outer edge of a 2nd flap part. The outer edge squeezed part has increased rigidity, and the peripheral part and the rigidity change at the inner edge of the outer edge squeezed part. Therefore, even if the second flap part receives a force from the front, i.e., a force to deform the second flap part, the outer edge folds inward starting from the inner edge of the outer edge squeezed part whose rigidity changes, In the region on the inner side in the width direction than the inner edge of the outer edge compressed portion, it is difficult for the twist to occur. Furthermore, since the first constricted portion is located behind the second flap portion, the first flap portion behind the first constricted portion is not easily affected by the kinking or twisting of the second flap portion. As a result, the fixed state to the underwear by the side adhesion part arrange | positioned at a 1st flap part is maintained.

  Further, according to a second feature of the present invention, the outer edge pressing portion is arranged on an outer edge of the first flap portion, and the side adhesive portion is more than an inner edge in the width direction of the outer edge pressing portion in the first flap portion. The gist of the present invention is located on the inner side in the width direction and on the inner side in the width direction than the first constricted portion.

  According to this feature, since the outer edge pressing part is also arranged in the first flap part, even if the outer edge of the first flap part is rolled up, it is easy to bend back from the inner edge of the outer edge pressing part. When a force from the front is applied to the first flap portion, it is easy to bend along the inner edge of the outer edge compressed portion, starting from the first constricted portion located at the front. Therefore, the edge of the outer edge is less likely to be affected by the side adhesive portion located in the width direction inner side than the inner edge in the width direction of the outer edge compressed portion in the first flap portion and in the width direction inner side than the first constricted portion.

  The third feature of the present invention is that the length (width w) from the inner edge in the width direction to the outer edge in the width direction of the outer edge pressing part in the first flap part is the same as that of the outer edge pressing part in the first flap part. The gist is that it is shorter than the length (distance a) from the widthwise inner edge to the widthwise outer end of the side adhesive portion.

  According to such a feature, in the first flap portion, even when the outer edge is folded back to the non-skin contact surface side starting from the inner edge of the outer edge compressed portion, the width of the outer edge compressed portion is changed from the side adhesive portion to the outer edge compressed portion. Since the distance is smaller than the distance to the side adhesive portion, the outer edge of the bent portion does not reach the side adhesive portion, and the side adhesive portion cannot be damaged.

  Further, according to a fourth feature of the present invention, the hip flap part includes a second constriction part (second constriction part 32) positioned in front of the second flap part, and the second constriction part includes: The gist is that it is located on the inner side in the width direction than the first constriction.

  According to this feature, since the second constriction is located in front of the second flap, when the outer edge of the second flap is curled, along the straight line connecting the first constriction and the second constriction It is easy to bend and prevents the inner area from dripping.

  In addition, according to a fifth feature of the present invention, the outer edge pressing portion in the first flap portion is located rearward of the first constricted portion, and the outer edge pressing portion in the second flap portion is the first The gist is to be located in front of the constricted portion.

  According to this feature, the outer edge pressing part is not arranged in the first constricted part. For this reason, the first constricted portion is lower in rigidity than the outer edge pressing portions of the first flap portion and the second flap portion, and is likely to be a starting point at which a twist or a twist occurs. When a force is applied from the central region, the first constricted portion is used as a starting point to cause a twist or a twist, thereby preventing the warp from occurring further in the widthwise inner side and the rear region.

  In addition, the sixth feature of the present invention is that the outer edge compressed portion in the second flap portion is located outside in the width direction from a straight line (virtual line VL) passing through the first constricted portion and the second constricted portion. The gist is to be located.

  According to this feature, the first constricted portion and the second constricted portion are lower in rigidity than the outer edge compressed portion of the second flap portion because the outer edge compressed portion is not disposed. Therefore, the outer edge of the second flap portion is likely to be folded on a straight line passing through the first constricted portion and the second constricted portion. When the force from the central region is applied, the outer edge of the second flap portion is folded back on a straight line passing through the first constricted portion and the second constricted portion. Prevent it from happening.

  Further, according to a seventh feature of the present invention, the hip flap part includes a side sheet (side sheet 11) disposed on the skin contact surface side and a back sheet (back sheet) disposed on the non-skin contact surface side. 3) and an intermediate layer (intermediate layer 12) disposed between the side sheet and the back sheet, and the intermediate layer is more than the outer edge compressed portion disposed in the hip flap portion. The gist is that it is located on the inner side in the width direction.

  According to such a feature, the rigidity of the region in which the intermediate layer is arranged is increased, so that the rigidity is changed between the region in which the intermediate layer is arranged and the outer edge compressed portion, which tends to be a starting point for folding. By folding back between the area where the intermediate layer is arranged and the outer edge pressing part, it is possible to prevent the inner area from being further swayed.

  The eighth feature of the present invention is summarized in that the hip flap portion includes a rear constriction portion (rear constriction portion 33) behind the first flap portion.

  According to this feature, the width of the first flap portion decreases as it goes from the portion where the width is maximum to the rear constricted portion. In the absorbent article having a longer rear region than the central region, the rear end portion swings in the width direction during use, and therefore, the rear end portion of the hip flap portion is easily rolled. Therefore, by arranging the rear constriction part behind the first flap part and stopping the constriction from the rear end part at the rear constriction part, the first flap part is prevented from being constricted.

  In addition, according to a ninth feature of the present invention, the main body portion includes a main body adhesive portion (main body portion slip prevention material 6) on the non-skin contact surface side, and the main body portion is at least a part of the rear end portion. The outer edge pressing part is arranged, and the width direction outer side end part of the outer edge pressing part arranged at the rear end part of the main body part and the rear end part of the outer edge pressing part in the hip flap part, It is a non-squeezed part (non-squeezed part X) where the outer edge compressed part is not disposed, and the side adhesive part and the main body adhesive part are more than a region extending in the front-rear direction from the non-squeezed part to at least the rear end of the central region. The gist is that they are respectively arranged on the outer side and the inner side in the width direction.

  According to this feature, the non-squeezed part has lower rigidity than the adjacent outer edge squeezed part. When the absorbent article is used, the non-compressed portion tends to be a starting point when the rear end portion swings in the width direction and a force is applied to deform the hip flap portion. Moreover, since the area | region which extends ahead from a non-pressing part neither the main body adhesion part nor the side adhesion part is arrange | positioned, the twist produced from the non-compression part is easy to extend. As a result, it is possible to prevent the other area from being caused.

  The tenth feature of the present invention is that a straight line extending in the front-rear direction along the inner edge in the width direction of the intermediate layer passes through the outer end in the width direction of the non-compressed portion and extends along the outer edge in the width direction of the absorber. The straight line extending in the front-rear direction passes through the widthwise outer end of the non-compressed part.

  According to such a feature, a region that is likely to be twisted and extends forward from the non-compressed portion coincides with a region having neither an absorber nor an intermediate layer and a low rigidity. Therefore, this area | region can absorb the force applied when the rear-end part of an absorbent article shakes in the width direction, and can suppress the influence on a 1st flap part.

  Further, according to an eleventh feature of the present invention, the hip flap portion has a side squeezed portion (second embossed wire 22) squeezed in the thickness direction, and the side squeezed portion extends in the width direction as it goes rearward. It extends from the inner side to the outer side in the width direction, and the gist is that the side adhesive portion is located behind the side pressing portion.

  According to this feature, when a force from the central region is applied, the hip flap portion is folded back along the side pressing portion, thereby preventing the rear region from being swung from the side pressing portion. As a result, the fixed state to the underwear by the side adhesion part located back rather than a side pressing part is maintained.

  Moreover, the twelfth feature of the present invention is that the side pressing part is constituted by a plurality of pressing parts compressed in the thickness direction, and the plurality of pressing parts are arranged at intervals. Is the gist.

  Moreover, as for the 13th characteristic of this invention, the said outer edge pressing part is comprised by the several pressing part compressed in the said thickness direction, and the several pressing part which comprises the said outer edge pressing part has a space | interval. The outline of the pressing part that constitutes the side pressing part is different from the outer shape of the pressing part that constitutes the outer edge pressing part.

  Moreover, the 14th characteristic of this invention makes it a summary that the space | interval of the pressing part which comprises the said side pressing part is larger than the space | interval of the pressing part which comprises the said outer edge pressing part.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which improved the fixed state of the hip flap part can be provided.

Drawing 1 is a top view seen from the surface side of an absorptive article concerning an embodiment of the present invention. FIG. 2 is a rear view of the absorbent article shown in FIG. FIG. 3 is an enlarged view of the hip flap portion shown in FIG. FIG. 4 is a schematic cross-sectional view of the X-X ′ cross section shown in FIG. 1. FIG. 5 is a schematic view showing a state where the absorbent article shown in FIG. 1 is deformed during use. FIG. 6 is a plan view seen from the surface side of the absorbent article according to the first modification of the present invention. FIG. 7: is the top view seen from the one part surface side of the absorbent article which concerns on the modification 2 of this invention.

(overall structure)
Next, the overall configuration of the embodiment of the absorbent article according to the present invention will be described with reference to the drawings. 1 to 4 show an absorbent article 1 according to an embodiment of the present invention. FIG. 1 is a plan view of the absorbent article, and FIG. 2 is a rear view of the absorbent article. FIG. 3 is an enlarged view of the hip flap portion shown in FIG. 4 is a schematic cross-sectional view taken along the line XX ′ shown in FIG. The absorbent article 1 according to the present embodiment is, for example, a sanitary napkin.

  The absorbent article 1 includes a main body portion M that extends in the front-rear direction L, and a side flap portion SF that protrudes outward from the main body portion M in the width direction W. The main body M is disposed between the liquid-permeable top sheet 2 that contacts the wearer's skin, the liquid-impermeable back sheet 3 that contacts the wearer's underwear, and the top sheet 2 and the back sheet 3. The absorber 4 is provided. The absorber 4 is arrange | positioned in the center part in the front-back direction L and the width direction W of the main-body part M by planar view. In FIG. 3, the outer edge B4 of the absorber 4 is shown with a broken line. The main body portion M includes a main body portion slip prevention material 6 on the non-skin contact surface side, that is, the back sheet 3 side.

  Side flap part SF is behind the wing part WG arrange | positioned in the width direction outer side of center area | region CA containing the center C of the excretion opening | mouth contact | abutting area | region where a wearer's excretion opening | contacts, and the rear-end part of the wing part WG. And a hip flap portion HF positioned at the same position. The side flap portion SF includes a side sheet 11 that extends outward in the width direction W of the top sheet 2 and a backsheet 3 that extends outward from the main body portion M in the width direction W. The side sheet 11 overlaps the top sheet 2 at the inner end in the width direction W, and is joined by a hot melt adhesive or the like.

  Here, the center C of the excretory opening contact area coincides with the center in the front-rear direction and the width direction of the central area CA where the wearer's excretion opening comes into contact. For example, in an absorbent article having a wing portion, the center in the front-rear direction of the wing portion is the center in the front-rear direction of the central region. Moreover, in the absorbent article which does not have a wing part, the position where the length dimension of the width direction of an absorber is the shortest becomes the center of the front-back direction of a center area | region. In addition, the excretion opening | mouth contact | abutting area | region C is contained in the area | region contact | abutted with a wearer's crotch part, and is located between a wearer's both legs.

The wing portion WG is configured to be folded back to the non-skin contact surface side of the wearer's underwear. The hip flap portion HF is configured to be fixed to the skin contact surface side of the wearer's underwear. The wing part WG and the hip flap part HF are each provided with a wing part displacement preventing material 9 and a hip flap part displacement preventing material 8 on the non-skin contact surface side. The detailed configuration of the hip flap part HF will be described later.

  In the absorbent article 1, the outer edges of the top sheet 2, the side sheet 11, and the back sheet 3 are joined, and the absorbent body 4 is enclosed. Examples of the bonding method include ultrasonic waves and hot melt adhesives. At least a part of the outer edge of the absorbent article 1 is formed with a seal portion 10 as an outer edge pressing portion by embossing. The top sheet 2, the side sheet 11, and the back sheet 3 are squeezed in the thickness direction by embossing. The embossing includes techniques such as heat embossing and ultrasonic embossing, and any technique can be used here. In addition to joining the outer edge of the absorbent article 1 with an adhesive or the like, the seal portion 10 is formed at least at a part, so that the joining of the outer edge is weakened during use and each sheet is prevented from being separated. In the enlarged view of the hip flap part HF shown in FIG. 3, the seal part 10 is shown as an assembly of dot-like pressing parts.

  Here, the outer edge of the absorbent article 1 means a region over a certain distance from the outermost side in the front-rear direction L and the width direction W of the absorbent article 1. In the part where the seal part 10 is formed, the width w which is the shortest distance from the outermost side of the absorbent article 1 to the inner edge of the seal part 10 is defined as the outer edge of the absorbent article 1.

  In the absorbent article 1, a compressed groove 5 is formed by compressing the top sheet 2 and the absorbent body 4 in the thickness direction. In addition, the pressing groove should just be formed by pressing at least the top sheet 2 and the absorber 4 in the thickness direction, and various structures can be adopted. For example, it can be formed by pressing or embossing, and the shape thereof may be a lattice network or a honeycomb shape.

(Configuration of top sheet and back sheet)
The top sheet 2 is a liquid-permeable sheet that transmits liquid such as body fluid. The top sheet 2 covers at least the surface of the absorber 4. The top sheet 2 is not particularly limited as long as it is a sheet-like material having a structure that allows liquid to permeate, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, and a mesh sheet. Either natural fibers or chemical fibers can be used as the woven or non-woven material.

  The backsheet 3 is preferably made of a material having flexibility that does not cause a feeling of strangeness when worn. The back sheet 3 is desirably liquid-impervious and moisture-permeable, and is preferably a polyethylene-based film, but a breathable film containing calcium carbonate and barium sulfate can also be used.

  A plurality of adhesive portions to which a hot melt adhesive is applied are provided on the surface in contact with the underwear of the backsheet 3. The adhesive part is provided on the back side of the main body part M, and is provided on the back side of the wing part WG and the main body part anti-slip material 6 for fixing the absorbent article 1 to the crotch part of the underwear. The wing part slip stopper 9 for fixing the wing part WG and the hip flap for fixing the hip flap part HF in an open state to the back of the underwear, provided on the back side of the hip flap part HF Part displacement prevention material 8.

  In a state before use, the main body part stopper 6 is in contact with the peeling tape 7, and the hip flap part stopper 8 and the wing part stopper 9 are in contact with a peeling tape (not shown). The release tape prevents the adhesive from deteriorating before use. And a peeling tape peels by a wearer at the time of use.

  In addition, in the absorbent article which does not have a peeling tape, you may be comprised so that it may prevent that an adhesive agent deteriorates before use with the packaging sheet which wraps an absorbent article individually. When the adhesive is in contact with the packaging sheet, it is desirable that the surface of the packaging sheet be subjected to a treatment that allows the adhesive to be peeled without reducing the adhesive strength of the adhesive.

(Configuration of absorber)
The absorber 4 includes hydrophilic fibers and pulp. The absorber 4 is formed of a material that can absorb body fluid such as menstrual blood. The absorbent body 4 may be formed by laminating hydrophilic fibers or powder by the airlaid method, an airlaid sheet obtained by forming hydrophilic fibers or powder into a sheet by the airlaid method, or a tissue (for example, It may be formed by placing pulverized pulp mixed with a superabsorbent polymer on a basis weight of 15 g / m ² ) and wrapping it with a tissue.

The absorber 4 is configured by wrapping a pulp obtained by laminating cotton-like pulp, synthetic pulp, or the like at a basis weight of about 100 to 300 g / m ² with protective paper (not shown). The absorber 4 may have a substantially uniform thickness on the entire surface or a non-uniform thickness. The protective paper is for maintaining the shape of the pulp, and for example, crepe paper or tissue paper can be used.

  The absorber 4 extends in the front-rear direction L and is provided so as to include at least the center C of the excretory opening contact region. The size of the absorber 4 is about one time smaller than the back sheet 3. The length of the absorbent body 4 in the width direction W corresponds to the crotch interval of an adult woman and is approximately 50 to 80 mm. The absorber 4 is bonded to the back sheet 3 with an adhesive such as hot melt. Moreover, in this embodiment, the absorber 4 and the top sheet 2 are adhere | attached with the hot-melt-adhesive.

(Configuration of side seat)
The side sheet 11 extends from the width direction W outer end of the top sheet 2 to the width direction W outer side. Similar to the top sheet 2, the side sheet 11 is disposed closer to the skin contact surface than the absorbent body 4. The side sheet 11 can be selected from the same material as the top sheet 2. However, in order to prevent menstrual blood from flowing over the side sheet 11 to the outside of the absorbent article 1, the side sheet 11 preferably has hydrophobicity or water repellency. The side seat 11 covers both side edges in the width direction W of the main body M, the wing WG, and the hip flap HF.

(Configuration of hip flap)
The hip flap portion HF is positioned behind the first constriction portion 31 and the first constriction portion 31 in which the width of the hip flap portion HF is smaller than the width of the front and rear regions of the hip flap portion HF. A first flap portion 41 that protrudes outward and includes a portion where the width of the hip flap portion HF is maximum, and is positioned forward of the first constriction portion and protrudes outward in the width direction from the first constriction portion. 2 flap portions 42. The seal portion 10 is disposed on the outer edge of the second flap portion 42, and the hip flap portion displacement preventing material 8 is disposed on the non-skin contact surface side of the first flap portion 41, that is, on the backsheet 3 side.

That is, in the absorbent article 1, the first constricted portion 31 is located in front of the first flap portion 41 that protrudes outward in the width direction in the hip flap portion HF, and the second constricted portion 31 is in front of the first constricted portion 31. flap portion 4 2 is located. When the wearer of the absorbent article 1 closes the leg, a force is applied from the outside in the width direction of the central area CA to the inside, and the force is transmitted backward. The force transmitted to the hip flap portion HF deforms the second flap portion 42 but is absorbed by the first constricted portion 31. Therefore, the force applied to the first flap portion 41 is reduced.

  Further, the seal portion 10 is disposed on the outer edge of the second flap portion 42. The rigidity of the seal portion 10 is increased, and the rigidity of the seal portion 10 is changed from that of the peripheral portion at the inner edge of the seal portion 10. For this reason, even when the second flap portion 42 receives a force from the front, that is, a force for deforming the second flap portion 42, the outer edge is folded back inward from the inner edge of the seal portion 10 whose rigidity changes. For this reason, it is difficult for the second flap portion 42 to distort. Furthermore, since the first constricted portion 31 is located behind the second flap portion 42, the first flap portion 41 behind the first constricted portion 31 is not easily affected by kinking or twisting in the second flap portion 42. . As a result, the fixed state to the underwear by the hip flap part displacement prevention material 8 arrange | positioned at the 1st flap part 41 is maintained. In addition, in FIG. 5, the state which the absorbent article 1 deform | transformed at the time of use is shown.

  Further, the seal portion 10 is disposed on the outer edge of the first flap portion 41, and the hip flap portion displacement stopper 8 is positioned on the inner side in the width direction than the first constricted portion 31.

  That is, since the seal portion 10 is also disposed in the first flap portion 41, even if the outer edge of the first flap portion 41 is rolled, it is easy to bend back from the inner edge of the seal portion 10. When a force from the front is applied to the first flap portion 41, the first flap portion 41 is easily folded back along the inner edge of the seal portion 10 with the first constricted portion 31 located at the front as a starting point. Therefore, the hip flap portion displacement preventing material 8 positioned on the inner side in the width direction than the first constricted portion 31 is less likely to be affected by the edge curl.

  Further, the hip flap part displacement preventing material 8 is located on the inner side in the width direction than the inner edge in the width direction of the seal part 10 in the first flap part 41. Here, the width w from the width direction inner edge to the width direction outer edge of the seal portion 10 in the first flap portion 41 is the width direction of the hip flap portion displacement preventing material 8 from the width direction inner edge of the seal portion 10 in the first flap portion 41. It is shorter than the distance a to the outer end.

That is, in the first flap portion 41, even when the outer edge is folded back to the non-skin contact surface side starting from the inner edge of the seal portion 10, the width w of the seal portion 10 is determined from the hip flap portion displacement prevention material 8. smaller than the distance a to the seal portion 10, turn-up portions of the outer edge does not reach the hip flap displacement-preventing member 8 is not turned up hip flap displacement preventing member 8.

  Further, the hip flap portion HF includes a second constricted portion 32 that is positioned forward of the second flap portion 42 and in which the width of the hip flap portion HF is smaller than the width of the front and rear regions thereof. The second constricted portion 42 is located on the inner side in the width direction than the first constricted portion 31.

  That is, since the second constricted portion 32 is located in front of the second flap portion 42, when the outer edge of the second flap portion 42 is rolled, it follows a straight line connecting the first constricted portion 31 and the second constricted portion 32. It is easy to bend and prevents the inner area from dripping.

  Further, the seal portion 10 in the first flap portion 41 is located behind the first constricted portion 31, and the seal portion 10 in the second flap portion 42 is located in front of the first constricted portion 31.

  That is, the innermost point in the first constricted portion 31 is lower in rigidity than the seal portion 10 of the first flap portion 41 and the second flap portion 42, and is likely to be a starting point at which kinking or twisting occurs. When a force is applied from the central area CA, the first constricted portion 31 is used as a starting point to cause a twist or a twist, thereby preventing the inner and rear areas from being swung further.

  Further, the seal portion 10 in the second flap portion 42 is located on the outer side in the width direction with respect to a straight line passing through the first constricted portion 31 and the second constricted portion 32.

  That is, the first constricted portion 31 and the second constricted portion 32 have lower rigidity than the seal portion 10 of the second flap portion 42. Therefore, as shown in FIG. 3, the outer edge of the 2nd flap part 42 is easy to bend on the virtual line VL which passes along these two points. When a force from the central area CA is applied, the outer edge of the second flap portion 42 is folded back on the imaginary line VL, thereby preventing the inner area and the rear area from being bent further.

  Preferably, the hip flap portion HF includes an intermediate layer 12 disposed between the side seat 11 and the back seat 3. The intermediate layer 12 is bonded to the side sheet 11 by a hot melt adhesive. From the viewpoint of flexibility and cost, it is preferable to use an SB (spunbond) nonwoven fabric or an SMS (spunbond-meltblown-spunbond) nonwoven fabric as the intermediate layer 12, and an SMS nonwoven fabric is used. It is more preferable. This is because the SMS nonwoven fabric has a meltblown layer of fine fibers, and therefore, even when embossing is performed from the side sheet 11 side when the side emboss 20 described later is formed, damage to the back sheet 3 can be suppressed. Further, since the SB nonwoven fabric and the SMS nonwoven fabric have a smooth surface, even if they are formed of a material different from that of the side sheet 11 and the back sheet 3, they can be easily joined with a hot melt adhesive or the like. A spunlace nonwoven fabric formed from fibers such as polyethylene terephthalate and rayon can also be used for the intermediate layer 12.

  In FIG. 3, the inner edge B12 in the width direction of the intermediate layer 12 is indicated by a broken line. The outer edge in the width direction of the intermediate layer 12 is located on the inner side in the width direction than the seal portion 10 disposed in the hip flap portion HF. That is, since the rigidity of the region in which the intermediate layer 12 is disposed is increased, the rigidity changes between the region in which the intermediate layer 12 is disposed and the seal portion 10 and is likely to be a starting point of folding. By folding back between the region in which the intermediate layer 12 is disposed and the seal portion 10, it is possible to prevent the inner region from being bent further.

  Further, the hip flap portion HF includes a rear constricted portion 33 in which the width of the hip flap portion HF is smaller than the width of the front and back regions behind the first flap portion 41.

  That is, the width of the first flap portion 41 decreases as it goes from the portion where the width is maximum to the rear constricted portion 33. An absorbent article having a longer rear region than the central region CA is more likely to swing in the width direction when used in the rear region. Therefore, the hip flap part HF receives the force which tries to deform | transform the hip flap part HF also from back. Then, the force which the 1st flap part 41 receives by arrange | positioning the back constriction part 33 in the back of the 1st flap part 41, and absorbing the force which is going to deform | transform the hip flap part HF from back by the back constriction part 33. Reduce.

  As shown in FIG. 3, a seal portion 10 is formed on at least a part of the rear end portion of the main body portion M. Here, the non-compressed portion in which the seal portion 10 is not disposed between the outer end portion in the width direction of the seal portion 10 disposed at the rear end portion of the main body portion M and the rear end portion of the seal portion 10 in the hip flap portion HF. Part X is provided. The hip flap part displacement prevention material 8 and the main body part displacement prevention material 6 are respectively disposed on the outer side and the inner side in the width direction than the region extending in the front-rear direction from the non-compressed portion X to at least the rear end portion of the central region CA.

  The non-compressed part X has lower rigidity than the adjacent seal part 10. When the absorbent article 1 is used, when the rear end portion swings in the width direction and a force for deforming the hip flap portion HF is applied, the non-squeezed portion X is likely to be a starting point for warping. Moreover, since the area | region extended ahead from the non-compressed part X is neither the hip-flap part displacement prevention material 8 nor the main-body-part displacement prevention material 6, the twist produced from the non-compressed part X is easy to extend. As a result, it is possible to prevent the other area from being caused.

  Moreover, the straight line extending in the front-rear direction along the width direction inner edge B12 of the intermediate layer 12 passes through the width direction outer end of the non-compressed portion X, and the straight line extending in the front-rear direction along the outer edge of the absorbent body 4 is not compressed. It passes through the width direction outer side end of the part X.

  That is, the region where the twist is likely to occur extending forward from the non-compressed portion X and the region where the absorber and the intermediate layer are not disposed and the rigidity is low coincide. Therefore, this region can absorb the force applied when the rear end portion of the absorbent article 1 swings in the width direction, and can suppress the influence on the first flap portion 41.

  Preferably, hip flap part HF has side embossing 20 squeezed in the thickness direction. As for the side embossing 20, the side sheet 11 and the back sheet 3 are compressed in the thickness direction by embossing from the side sheet 11 side. When the side flap part SF includes the intermediate layer 12, the side sheet 11, the intermediate layer 12, and the back sheet 3 of the side emboss 20 are compressed in the thickness direction. The side embossing 20 includes a first embossing line 21 extending rearward from the rear end of the wing part WG, a second embossing line 22 branched from the first embossing line 21 and extending outward in the width direction W, and a third embossing line 22. An emboss line 23 and a fourth emboss line 24 are included.

  The second embossed line 22, the third embossed line 23, and the fourth embossed line 24 are formed so as to extend from the inner side in the width direction toward the outer side in the width direction toward the rear, whereby the side embossing 20 is subjected to a force. In order to follow the direction, the side embossing 20 becomes a folding start point, and the hip flap part HF is naturally folded. Therefore, it becomes easy to fit the hip flap part HF reasonably to the body and the underwear. Accordingly, disordered wrinkles are less likely to occur in the hip flap portion HF, a deformation without a sense of incongruity can be achieved, and a clean wearing feeling can be obtained.

  The side embossing 20 shown in FIG. 1 is arranged in the order of the fourth embossing line 24, the third embossing line 23, and the fourth embossing line 24 from the front. The hip flap part slip stopper 8 is positioned rearward of the fourth emboss line 24 positioned rearmost among the side embosses 20 extending from the inner side in the width direction toward the outer side in the width direction as going rearward.

  That is, when a force is applied from the central area CA, the hip flap portion HF is folded back along the side embosses 20 extending from the inner side in the width direction toward the outer side in the width direction as it goes rearward, thereby causing a rearward deflection. To prevent. As a result, the fixed state to the underwear by the hip flap part displacement preventing material 8 positioned rearward of the fourth emboss line 24 positioned rearmost is maintained.

(Method for manufacturing absorbent article)
Next, a part of manufacturing method of the absorbent article 1 according to the present embodiment will be described. In addition, about the method which is not demonstrated, the existing method can be used. The manufacturing method of an absorbent article performs a sheet | seat production | generation process as a 1st step. Next, as a second step, a sheet joining process is performed. Specifically, the top sheet 2 and the side sheet 11 are bonded by, for example, heat welding.

  As a third step, an absorber molding process is performed. Specifically, the absorbent body 4 is formed by molding pulp as a material of the absorbent body with a molding drum. Note that the order of the sheet generation process in the first step and the second step and the absorbent body molding process in the third step may be reversed.

  In the fourth step, a joining process is performed. Specifically, the joining process which joins the absorber shape | molded in the 3rd step, and the top sheet | seat and side sheet | seat joined in the 2nd step is performed.

  In the fifth step, the forming step of the compressed groove 5 is performed. Specifically, the top sheet 2 and the absorbent body 4 are compressed in the thickness direction to form the compressed grooves 5. When providing the intermediate | middle layer 12 in the hip flap part HF, the sheet | seat of the intermediate | middle layer 12 is joined to the back surface of the side sheet 11 after a pressing process. The joining is performed by applying a hot melt adhesive.

  In the sixth step, a backsheet joining process is performed. Specifically, the absorbent body 4 and the top sheet 2, the side sheet 11, and the back sheet 3 in which the compressed grooves are formed are joined by application of a hot melt adhesive.

  As a seventh step, an embossing process is performed. Specifically, the formation of the side emboss 20 and the formation of the seal portion 10 are performed simultaneously. The side embossing 20 is formed by compressing the side sheet 11 and the back sheet 3 in the thickness direction. When the hip flap part HF includes the intermediate layer 12, the side sheet 11, the intermediate layer 12, and the back sheet 3 are compressed in the thickness direction to form the side emboss 20. The seal portion 10 is formed by compressing the top sheet 2, the side sheet 11, and the back sheet 3 in the thickness direction along the outer edge of the absorbent article. Then, the top sheet 2 etc. are cut according to the line of a product shape.

  Thereafter, the side flap portion SF is folded along the front-rear direction, and an adhesive is applied to the back sheet 3 of the side flap portion SF as a hip flap portion displacement preventing material 8 and a wing portion displacement preventing material 9. Perform the packaging process. The absorbent article which concerns on this Embodiment can be manufactured according to said process.

(Modification 1)
FIG. 6 is a plan view of an absorbent article according to Modification 1 of the present invention as viewed from the front surface side. In the following description of the modified example, parts having the same configuration as in the present embodiment are represented by the same reference numerals, and description thereof is omitted.

  An absorbent article 1 ′ shown in FIG. 6 includes a side absorbent body 4 ′ instead of the intermediate layer 12 between the side sheet 11 and the back sheet 3 in the hip flap part HF. In FIG. 6, the side absorber 4 ′ is formed integrally with the absorber 4 by extending the absorber 4 in the width direction W. The side embossing 20 'compresses and integrates at least the side sheet 11 and the side absorbent body 4'. The side embossing 20 may be formed only in a portion where the side absorber 4 'is disposed.

  FIG. 7: is the top view seen from the one part surface side of the absorbent article which concerns on the modification 2 of this invention. The absorbent article shown in FIG. 7 has the 2nd embossed wire 22 and the 3rd embossed wire 23 as a side pressing part, and these embossed lines are comprised by the some pressing part compressed in the thickness direction. Yes. Specifically, the 2nd embossed line 22 and the 3rd embossed line 23 are comprised by the aggregate | assembly of several dotted | punctate pressing parts.

  A side absorbent body 4 ′ is disposed in the hip flap portion where the second emboss line 22 and the third emboss line 23 are formed. Therefore, when the body fluid flows from the center in the width direction of the absorbent article to the outside in the width direction, the body fluid is drawn by the second emboss line 22 and the third emboss line 23, and the body fluid reaches the outer edge of the absorbent article. Can be prevented. Furthermore, the 2nd emboss line 22 and the 3rd emboss line 23 are arrange | positioned inside the width direction rather than the seal part 10 as an outer edge pressing part. Therefore, the user can clearly see the second embossed line 22 and the third embossed line 23, can recognize that the embossed line that can draw in body fluid is present inside the outer edge of the absorbent article, A sense of security that side leakage is unlikely to occur can be obtained.

  Further, the second embossed line 22 and the third embossed line 23 are arranged at a distance from the seal part 10 as the outer edge pressing part, and are drawn by the second embossed line 22 and the third embossed line 23. The body fluid is configured not to reach the seal portion. Therefore, it is possible to prevent side leakage due to the body fluid drawn by the second embossed wire 22 and the third embossed wire 23 reaching the seal portion 10.

  The 2nd embossed wire 22 and the 3rd embossed wire 23 are comprised by the aggregate | assembly of several dotted | punctate pressing parts, and the pressing part is not continuing in the shape of a line. According to the aggregate | assembly of several dotted | punctate pressing parts, it can suppress that a hip flap part becomes hard too much by the pressing part compared with the pressing part which continues in a line shape. Therefore, it becomes easy to deform | transform a hip flap part flexibly along a body line, and can fit a hip flap to a body more.

  It is desirable that the shape of the squeezing part constituting the second embossed wire 22 and the third embossed line 23 is different from the shape of the squeezing part constituting the seal part. In addition, it is the 2nd embossed line which is the concept including not only the structure from which external shapes differ, such as circular shape and triangular shape, but the similar shape which is the same shape, but a magnitude | size is different. 22 and the emboss line which can draw in body fluid by making the shape of the pressing part which constitutes the 3rd embossing line 23, and the shape of the pressing part which constitutes the seal part differ from the outer edge of the absorbent article It can be recognized that it is present, and a sense of security that side leakage hardly occurs can be obtained.

  As for the space | interval of the pressing part which comprises the 2nd embossing wire 22 and the 3rd embossing wire 23, it is desirable that it is larger than the space | interval of the pressing part which comprises the seal | sticker part 10. FIG. If the space | interval of a pressing part is enlarged, the area | region which is not compressed between the pressing parts will be arrange | positioned. The unsqueezed area is softer and less irritating to the skin than the squeezed area. Therefore, the hip flap part can be more flexibly deformed along the body line, and the hip flap part can be fitted to the body more.

(Other embodiments)
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, in the present embodiment, the side emboss 20 is linear, but may be constituted by, for example, a plurality of dot-like aggregates arranged intermittently.

  Moreover, although the seal | sticker part 10 was demonstrated as a dot-shaped aggregate | assembly in this Embodiment, it is not limited to this. The seal part 10 may be a grid-like aggregate or a linear pressing part.

  Moreover, in this Embodiment, although described as providing the top sheet 2 and the side sheet | seat 11 separately, it is not limited to this. The top sheet and the side sheet can be integrally formed by extending the top sheet in the width direction from the main body part to the side flap part.

  Moreover, although this Embodiment demonstrated as what forms the side embossing 20 only in the hip flap part HF, it is not limited to this. By forming side embossing also on the wing part WG, it is possible to facilitate entrainment of the wearer in underwear.

  Further, gathers may be formed at both ends of the main body M in the width direction W.

  In the present embodiment, the side flap portion SF has been described as having the wing portion WG. However, the present invention is not limited to this. The side flap part SF may not have the wing part WG but may have only the hip flap part HF.

  Moreover, although this Embodiment demonstrated as what has the 2nd constriction part 32 ahead of the 2nd flap part 42, it is not limited to this. For example, in an absorbent article having a short length in the front-rear direction L, the second constricted portion 32 may not be provided, and the front of the second flap portion 42 may be continuous with the rear end portion of the wing portion WG.

  In the present embodiment, it has been described that only one portion where the width of the hip flap portion HF is maximum is included in the first flap portion 41, but the present invention is not limited to this. For example, in an absorbent article having a long length in the front-rear direction L, the first flap portion 41 can be provided with two portions where the width of the hip flap portion HF is maximum. In this case, the position of the hip flap part displacement stopper 8 in the front-rear direction L is preferably located at the rear part of the part where the width of the hip flap part HF is maximum, but the width of the hip flap part HF. It may be located in the part located ahead among the part where becomes maximum.

L: Front-rear direction, W: Width direction, M: Main body part, C: Center of excretory opening contact area, CA ... Central area, SF ... Side flap part, WG ... Wing part, HF ... Hip flap part, 1 ... Absorption 2 ... Top sheet, 3 ... Back sheet, 4 ... Absorber, 5 ... Squeeze groove, 6 ... Body part detent material, 7 ... Release tape, 8 ... Hip flap part detent material, 9 ... Wing part misalignment Stop material, 10 ... Sealing part, 11 ... Side sheet, 12 ... Intermediate layer, 20 ... Embossed part, 21 ... First embossed line, 22 ... Second embossed line, 23 ... Third embossed line, 24 ... First 4 embossed wires, 31 ... first constricted portion, 32 ... second constricted portion, 33 ... rear constricted portion, 41 ... first flap portion, 42 ... second flap portion, VL ... virtual line, X ... non-compressed portion

Claims (13)

In an absorbent article having a front-rear direction and a width direction orthogonal to the front-rear direction,
A main body provided with an absorber;
A hip flap portion that protrudes outward in the width direction from the outer edge in the width direction of the main body portion behind the central region including the center of the excretion port contact region that is disposed to face the excretion port of the wearer,
At least a part of the outer edge of the absorbent article has an outer edge pressing part,
The hip flap portion includes a side adhesive portion on the non-skin contact surface side,
The hip flap part is
The first constriction,
A first flap portion that is located rearward of the first constricted portion, protrudes outward in the width direction from the first constricted portion, and includes a portion having a maximum width of the hip flap portion;
A second flap portion located forward of the first constriction portion and projecting outward in the width direction from the first constriction portion,
On the outer edge of the second flap part, the outer edge pressing part is arranged,
The side adhesive portion is disposed on the non-skin contact surface side of the first flap portion ,
The hip flap part is
A second constricted portion located in front of the second flap portion;
The said 2nd constriction part is an absorbent article located in the width direction inner side rather than the said 1st constriction part . On the outer edge of the first flap part, the outer edge pressing part is arranged,
The said side adhesion part is located in the width direction inner side rather than the width direction inner edge of the said outer edge pressing part in the said 1st flap part, and is located in the width direction inner side from the said 1st constriction part. Absorbent article.   The length from the width direction inner edge to the width direction outer edge of the outer edge pressing portion in the first flap portion is from the width direction inner edge of the outer edge pressing portion in the first flap portion to the width direction outer end portion of the side adhesive portion. The absorptive article according to claim 2 shorter than the length of.   The said outer edge pressing part in a said 1st flap part is located back rather than the said 1st constriction part, The said outer edge pressing part in a said 2nd flap part is located ahead of the said 1st constriction part. The absorbent article according to 2 or 3. 2. The absorbent article according to claim 1 , wherein the outer edge squeezed portion of the second flap portion is located on the outer side in the width direction with respect to a straight line passing through the first constricted portion and the second constricted portion. The hip flap part includes a side sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an intermediate layer disposed between the side sheet and the back sheet. With
The said intermediate | middle layer is an absorbent article of Claim 4 or 5 located in the width direction inner side rather than the said outer edge pressing part arrange | positioned at the said hip flap part. The absorptive article according to any one of claims 1 to 6 , wherein the hip flap part includes a rear constriction part behind the first flap part. The body portion includes a body adhesive portion on the non-skin contact surface side,
The outer edge squeezed portion is disposed at least at a part of the rear end portion of the main body portion,
Between the width direction outer side edge part of the said outer edge pressing part arrange | positioned at the rear-end part of the said main-body part, and the rear edge part of the said outer edge pressing part in the said hip flap part, the said outer edge pressing part is not arrange | positioned. Department,
The side adhesive portion and the main body adhesive portion, said being arranged widthwise outside and inside the non-compressed portion extending in the longitudinal direction to at least the rear end portion of the central area from the region, one of the claims 1 to 7 The absorbent article of Claim 1. The hip flap part includes a side sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an intermediate layer disposed between the side sheet and the back sheet. With
A straight line extending in the front-rear direction along the widthwise inner edge of the intermediate layer passes through the widthwise outer end of the non-compressed portion, and a straight line extending in the front-rear direction along the widthwise outer edge of the absorbent body is the non-compressed The absorbent article of Claim 8 which passes the width direction outer side edge part of a part. The hip flap part has a side pressing part,
The side compressed portion extends from the inner side in the width direction toward the outer side in the width direction as it goes rearward.
The absorbent article according to any one of claims 1 to 9 , wherein the side adhesive portion is located rearward of the side pressing portion. The side pressing part is constituted by a plurality of pressing parts,
The absorptive article according to claim 10 in which said a plurality of pressing parts are arranged at intervals. The outer edge pressing part is constituted by a plurality of pressing parts,
The plurality of pressing parts constituting the outer edge pressing part are arranged at intervals,
The external shape of the pressing part which comprises the said side pressing part, and the external shape of the pressing part which comprises the said outer edge pressing part are different, The absorbent article of Claim 11 . The absorptive article according to claim 12 whose interval of the pressing part which constitutes said side pressing part is larger than the interval of the pressing part which constitutes said outer edge pressing part.

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