JP2010042060A - Absorbent article - Google Patents

Abstract

An object of the present invention is to form a hollow loop-shaped leak-proof wall having a substantially circular cross section in the excretory part region that is in contact with a body fluid excretion part of a wearer, thereby improving fit to the wearer, preventing twisting and preventing leakage. To provide an absorbent article capable of increasing the resistance.
A sanitary napkin 1A according to the present invention comprises an absorbent main body 5 having a top sheet 2, a back sheet 3 and an absorbent body 4, and a hollow loop-shaped leak-proof wall 7 on both longitudinal sides 5a. It has. The leak-proof wall 7 stands in a hollow loop shape in the excretion part region a. The leak-proof wall 7 has a part of the loop-shaped leak-proof wall 7 on the outer side e and / or the inner side in the width direction of the sanitary napkin 1A in at least one of the front and rear of the loop-shaped part. Folded portions 71 and 72 are folded inward of the leak-proof wall 7 from the side d.
[Selection] Figure 3

Description

  The present invention relates to absorbent articles such as sanitary napkins and incontinence pads.

Conventionally, sanitary napkins provided with leak-proof walls on both side edges in the longitudinal direction are known in order to prevent side leakage in which body fluids such as menstrual blood being worn move in the width direction and leak from the side edges. ing.
Moreover, in order to improve the fit of the leak-proof wall to the wearer, a hollow loop-shaped leak-proof wall is known. For example, in Cited Document 1, the fit is high, and even when stress from the left and right such as the movement of the wearer's foot is applied, it is buffered with a hollow loop shape, and the sanitary napkin is not twisted, A sanitary napkin having a hollow loop-shaped leak-proof wall having a high leak-proof property is disclosed.

  In recent years, especially in sanitary napkins for night use, the length of sanitary napkins tends to be long, and along with the length of sanitary napkins, the leak-proof wall is also long. When the leak-proof wall becomes long, it becomes difficult to stand up the hollow leak-proof walls at both side edges located in the excretion part region in contact with the body fluid excretion part of the wearer into a loop shape having a substantially circular cross section. .

Japanese Patent Laid-Open No. 11-299821

  Therefore, the object of the present invention is to easily erect the hollow leak-proof walls at both side edges located in the excretion part region in contact with the body fluid excretion part of the wearer into a loop shape having a substantially circular cross section. In addition, since the shape of the leak-proof wall is a loop shape having a substantially circular cross section, it is an object of the present invention to provide an absorbent article that improves fit to the wearer and is excellent in preventing twisting and leakage.

  The present invention includes a vertically long absorbent main body comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets, and the absorbent A leak-proof article provided with leak-proof walls formed on both sides in the longitudinal direction of the main body, wherein each of the leak-proof walls has one side part and the other side part in the longitudinal direction of the stretchable sheet. The elastic sheet is joined to the absorbent main body at the front and rear of the excretory part region, and stands in a hollow loop shape in the excretion part region, The joining portion of each of the loop-shaped leak-proof walls in the excretory portion region is joined to the skin contact surface side of the side portion in the longitudinal direction of the absorbent main body, and the one side portion of the stretchable sheet is joined. In front of the non-skin contact surface on the longitudinal side of the adhesive body The other side portion of the elastic sheet is joined, and each of the leak-proof walls absorbs a part of the loop-shaped leak-proof wall in at least one of the front and rear of the loop-shaped portion. The object is achieved by providing an absorbent article having a folded portion that is folded inward of the leak-proof wall from the outer side and / or the inner side in the width direction of the absorbent article.

  According to the absorbent article of the present invention, it is possible to form a hollow loop-shaped leak-proof wall having a substantially circular cross section in the excretion part region that is in contact with the body fluid excretion part of the wearer. It is possible to increase the prevention of twisting and leakage.

  Hereinafter, a preferred embodiment of a sanitary napkin that is an absorbent article of the present invention will be described with reference to FIGS.

As shown in FIG. 1, the sanitary napkin 1 </ b> A of the first embodiment is formed symmetrically with respect to a center line CL extending in the longitudinal direction of the sanitary napkin 1 </ b> A.
Therefore, in the following, the left side configuration of the sanitary napkin 1A will be mainly described in detail, the right side configuration will not be described as appropriate, and the right side component corresponding to the left side component will be denoted by a dash (' ) Is attached.

As shown in FIGS. 1 to 3, an absorbent article (a sanitary napkin) 1 </ b> A of the first embodiment includes a surface sheet 2 on the skin contact surface side, a back sheet 3 on the skin non-contact surface side, and both sheets 2. , 3 having a substantially longitudinal absorbent body 5 having an absorbent body 4 interposed between them, and leak-proof walls 7 and 7 'formed on both longitudinal sides 5a and 5a' of the absorbent body 5. I have.
As shown in FIGS. 1 and 2, each of the leak-proof walls 7, 7 ′ is formed by joining one side 6 a and the other side 6 b in the longitudinal direction of the stretchable sheets 6, 6 ′ to the absorbent main body 5, Joined at 8D and formed by joining the elastic sheets 6 and 6 'to the absorbent main body 5 in front and rear of the excretory part region a, and standing up in a hollow loop shape in the excretion part region a Yes.
As shown in FIG. 2, the joint portions 8 of the loop-shaped leak-proof walls 7 and 7 ′ in the excretion portion region a are side portions in the longitudinal direction (CL direction; direction parallel to the CL line) of the absorbent main body 5 One side part 6a of the elastic sheets 6, 6 ′ is joined to the skin contact surface side in 5a. The joint portions 8D of the loop-shaped leak-proof walls 7 and 7 ′ are arranged on the non-skin contact surface side of the side portion 5a in the longitudinal direction (CL direction) of the absorbent main body 5 and the elastic sheets 6 and 6 ′. The side part 6b is joined and formed.
As shown in FIG. 3 (a), each of the leak-proof walls 7 and 7 'has a part of the loop-shaped leak-proof walls 7 and 7' in at least one of the front and rear of the loop-shaped part. The sanitary napkin 1A has folding portions 71, 72, 71′72 ′ that are folded inwardly from the outer side e and / or the inner side d of the sanitary napkin 1A.

  Here, the “excretion part region a” means an area that is in contact with the body fluid excretion part of the wearer, and is in the product longitudinal direction (CL direction) that occurs when the sanitary napkin is folded into the individual form. With respect to two perpendicular folding lines, the area is the same as or narrower than the area surrounded by the first folding line and the second folding line, counting from the front end in the longitudinal direction of the sanitary napkin. When the sanitary napkin has a long product length and three fold lines are generated, the product is counted from the front end in the longitudinal direction of the product or from the front end in the longitudinal direction of the product. An area that is the same as or narrower than the area surrounded by the first fold line and the third fold line. In the sanitary napkin 1A of the present embodiment, the excretion part region a is narrower than the region surrounded by the first fold line a1 and the second fold line a2 generated in the so-called two-fold individual form as shown in FIG. It is an area.

  “Standing” means a state in which the upper surfaces of the hollow loop-shaped leak-proof walls 7, 7 ′ are located above the surface of the surface sheet 2, and “standing upright” means “leak-proofing wall” This means that the uppermost part of 7, 7 ′ is located above the surface of the topsheet 2.

  The sanitary napkin 1A of the first embodiment will be described in detail. As shown in FIG. 1, the sanitary napkin 1A of the present embodiment contacts the body fluid excretion part of the wearer in the longitudinal direction (CL direction). The rear region b, the excretion region a, and the front region c are provided in front of the excretion region a. The leak-proof wall 7 stands in a loop shape at least in the excretion part region a. Thus, the portion of the leak-proof wall 7 standing in a loop shape is a region that is wider in the longitudinal direction (CL direction) than the excretory region a, and in the sanitary napkin 1A of the present embodiment, In other words, the region is substantially the same size as the region surrounded by the first fold line a1 and the second fold line a2 that are generated in the so-called two-fold individual form. The sanitary napkin 1A of 1st Embodiment is equipped with the surface sheet 2, the back surface sheet 3, and the absorber 4 as shown in FIGS. 1-3, A pair of embossing which fixes the surface sheet 2 and the absorber 4 A groove 9 is provided. The embossed grooves 9 extend in the longitudinal direction on both sides of the sanitary napkin 1A. Each of the top sheet 2 and the back sheet 3 has a larger outer diameter than the absorber 4. The top sheet 2 and the back sheet 3 are extended from both ends in the longitudinal direction of the absorbent body 4 at both ends in the longitudinal direction of the sanitary napkin 1A, and the extended portions are joined to each other by heat sealing or the like. 5 is formed. On the surface of the back sheet 3, an adhesive is applied to form a shift stopper (not shown). These configurations are the same as the conventional products.

Next, the loop-shaped leak-proof wall 7 of the sanitary napkin 1A of the present embodiment will be described.
In the sanitary napkin 1A of the first embodiment, as shown in FIG. 1 to FIG. 3, the belt-shaped stretchable sheet 6 extends along the longitudinal direction on the side portion 5 a in the longitudinal direction (CL direction) of the absorbent main body 5. These are disposed and fixed, and by contraction of the stretchable sheet 6, a hollow loop-shaped leak-proof wall 7, which protrudes upward on the skin contact surface side, is formed.

  In the sanitary napkin 1A of the first embodiment, the stretchable sheet 6 is a composite sheet provided with stretchability by an elastic member 63. As shown in FIGS. 2 and 3, the stretchable sheet 6 includes a sheet 61 on the skin contact surface side, a sheet 62 on the non-skin contact surface side, and a plurality of elastic members between the sheets 61 and 62. 63 is formed. The sheet 61 on the skin contact surface side and the sheet 62 on the non-skin contact surface side are belt-shaped (rectangular) sheets of the same shape and size, and the stretchable sheet 6 is a sheet on the skin contact surface side. Between the sheet 61 and the sheet 62 on the non-skin contact surface side, a thread-like elastic member 63 is disposed in the longitudinal direction (CL direction) of the sheets 61 and 62, and each of the plurality of elastic members 63 is a belt-like sheet. 61 and 62 are equally arranged in the width direction (direction orthogonal to the CL direction). As shown in FIG. 1, each of the plurality of elastic members 63 is disposed longer than the excretion part region a that comes into contact with the body fluid excretion part of the wearer when the leak-proof wall 7 is formed.

  As shown in FIGS. 2 and 3, the stretchable sheet 6 has a skin contact surface side sheet 61 on one side portion 6 a in the longitudinal direction of the stretchable sheet 6 so as to sandwich the topsheet 2 and the absorber 4. The surface is joined to the surface of the top sheet 2 on the skin contact surface side to form a joint 8. Further, the other side portion 6b in the longitudinal direction of the stretchable sheet 6 is disposed between the absorbent body 4 and the back sheet 3, and the surface of the sheet 62 on the non-skin contact surface side of the other side section 6b is the absorbent body 4. Are joined to the surface on the non-skin contact surface side to form a joint 8D. Moreover, the elastic sheet 6 has a part joined to the absorptive main body 5 in the front area | region c ahead of the excretion part area | region a and the back rear area | region b. Thus, since the belt-like stretchable sheet 6 is disposed and joined along the longitudinal direction to the side portion 5a in the longitudinal direction (CL direction) of the absorbent main body 5, the stretchable sheet 6 contracts. As a result, the leak-proof wall 7 having a portion standing in a hollow loop shape is formed. Joining can be performed by heat sealing, an adhesive, or the like. In the first embodiment, the joint portion 8 is formed by heat sealing, and the sheet 62 on the non-skin contact surface side of the stretchable sheet 6 and the absorber 4 are joined by an adhesive. Moreover, in 1st Embodiment, joining of the surface sheet 2 and the absorber 4 is performed with an adhesive agent, and joining of the sheet | seat 61 of the elastic contact sheet 6 and the back surface sheet 3 (joining part 8D). ) Is performed by heat sealing.

As shown in FIG. 1, the leak-proof wall 7 is at least one of the front and rear of the loop-shaped portion. In this embodiment, as shown in FIG. Folded portions 7a1 and 7a2 are provided in the first fold line a1 and the second fold line a2, respectively. As shown in FIG. 3 (a), each of the folding portions 7a1 and 7a2 has a part of the loop-shaped leak-proof wall 7 in the width direction of the sanitary napkin 1A (in the direction orthogonal to the longitudinal center line CL). It has an inner side folding part 71 formed by being folded from the side d to the inside of the leak-proof wall 7. Furthermore, it has the outer side folding part 72 formed by being folded inward of the leak-proof wall 7 from the outer side e. The surfaces of the sheet 61 on the skin contact surface side of the inward folding portion 71 are joined as shown in FIG. The joining can be performed through heat sealing, an adhesive, or the like. In the first embodiment, the joining is performed using an adhesive. The surfaces of the sheet 61 on the skin contact surface side of the outward folding portion 72 are also joined in the same manner. Further, as shown in FIG. 3A, elastic members 63 are arranged at the tips of the inner side folding part 71 and the outer side folding part 72, respectively. By disposing the elastic member 63, it becomes a flexible shaft, and the leak-proof wall 7 is easily folded.
In the leak-proof wall 7 of the sanitary napkin 1A of the first embodiment, as shown in FIG. 3 (a), the outer side folding part 72 is formed to have a longer folding than the inner side folding part 71. Yes.

The length of the sanitary napkin 1A of the first embodiment is preferably 240 mm to 440 mm, and is formed at the first folding line a1 portion and the second folding line a2 portion generated in the case of the two-fold individual packaging form. The distance (length in the longitudinal direction (CL direction)) between the folding portions 7a1 and 7a2 is a length in the range of 2% to 60% with respect to the length of the sanitary napkin 1A.
The length in the width direction (perpendicular to the longitudinal center line CL) of the inward folding portion 71 of the leak-proof wall 7 of the sanitary napkin 1A of the first embodiment is preferably 2 mm to 15 mm, and is outward. The length in the width direction (direction perpendicular to the longitudinal center line CL) of the side folding portion 72 is preferably 3 mm to 15 mm.

  As shown in FIGS. 1 and 3A, the leak-proof wall 7 is formed in the width direction of the sanitary napkin 1 </ b> A from the joint 8 between the stretchable sheet 6 and the absorbent main body 5 in the folding portions 7 a 1 and 7 a 2. It is located outward (perpendicular to the longitudinal center line CL). Here, it is located outward in the width direction from the joint portion 8, as shown in FIG. 3A, an inward folding formed by folding the leak-proof wall 7 inward. The lower end portion 71a on the skin contact surface side of the portion 71 is more sanitary than the lower end portion 71b on the non-skin contact surface side of the inward folding portion 71 (the side edge portion 8a on the inner side in the longitudinal direction of the joint portion 8). This means that the napkin 1A is located outward in the width direction (perpendicular to the longitudinal centerline CL), and the lower end 71a on the skin contact surface side is the outer side edge 8b in the longitudinal direction of the joint 8. Therefore, the sanitary napkin 1A does not need to be located outward in the width direction.

  As shown in FIGS. 1 and 3 (b), the composite sheet forming the leak-proof wall 7 is folded in front and rear of the loop-shaped portion of the leak-proof wall 7, in this embodiment, in two. The elastic member 63 is not arranged and the stretchable sheet 6 is not formed in the front of the first folding line a1 portion and the rear of the second folding line a2 portion generated in the individual packaging form. As shown in FIGS. 1 and 3B, the skin contact surface side sheet 61 and the non-skin contact surface side sheet 62, which form the composite sheet, in the region where the elastic member 63 is not disposed, It is positively bent so as not to form a hollow loop-shaped leak-proof wall 7 that protrudes convexly toward the contact surface. The composite sheet forming the leak-proof wall 7 extends from both ends in the longitudinal direction of the absorbent body 4 at both ends in the longitudinal direction of the sanitary napkin 1 like the top sheet 2 and the back sheet 3. The protruding portion is bonded and fixed by heat sealing or hot melt.

A material for forming the sanitary napkin 1A according to the first embodiment will be described.
As the said surface sheet 2, the said back surface sheet 3, and the said absorber 4, if normally used for absorbent articles, such as a sanitary napkin, it can use without a restriction | limiting especially.

  The stretchable sheet 6 preferably has stretchability, stands up in a loop shape at least in the excretion region a, and has rigidity that can be freely deformed while maintaining this loop shape. For example, examples of the sheet material include a stretchable film, a stretchable nonwoven fabric, a stretchable woven fabric, or a laminated sheet thereof. Specifically, the material itself made of a natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene-α olefin copolymer such as polyethylene-ethyl acrylate, etc. has elasticity. Further, as described above, there is a composite sheet in which the elastic member 63 made of these stretchable materials in the form of a thread is disposed between the sheet 61 on the skin contact surface side and the sheet 62 on the non-skin contact surface side.

  The sheet 61 on the skin contact surface side of the stretchable sheet 6 is preferably a thermoplastic nonwoven fabric made of polyethylene / polyester, polyethylene / polypropylene, or polypropylene in order to improve the touch. The same applies to the sheet 62 on the non-skin contact surface side. For such a thermoplastic nonwoven fabric, it is preferable to use fibers crimped so that the nonwoven fabric itself has stretchability. When using a non-crimped non-woven fabric which is not crimped for the sheet 61 on the skin contact surface side and the sheet 62 on the non-skin contact surface side, the thread-like elastic member 63 is stretched to a predetermined stretch ratio in advance. Then, the composite sheet may be created by adhering it to the sheet 61 on the skin contact surface side and the sheet 62 on the non-skin contact surface side by hot melt, heat sealing or the like.

Each of the plurality of elastic members 63 of the stretchable sheet 6 is arranged at equal intervals between the sheet 61 on the skin contact surface side and the sheet 62 on the non-skin contact surface side.
In order to dispose the elastic member 63 at the front end of the inner side folding parts 71, 71 'and the outer side folding parts 72, 72' of the leak-proof walls 7, 7 ', respectively, the elastic member 63 at another position is arranged. Instead, it can be arranged by setting the elastic contraction rate of the elastic member 63 at the tip higher. Moreover, it can arrange | position by making the elastic member 63 of a front end thicker than the elastic member 63 of another position (elastic contraction force is strong).

  The stretchable sheet 6 may be colored, and the color may be any of the sheet 61 on the skin contact surface side, the sheet 61 on the non-skin contact surface side, and the elastic member 63 of the stretchable sheet 6. Or it may be given to all.

Next, the effect at the time of using the sanitary napkin 1A of 1st Embodiment of this invention mentioned above is demonstrated.
As shown in FIGS. 1 to 3, the sanitary napkin 1 </ b> A of the first embodiment includes a pair of leak-proof walls 7 and 7 ′, and each of the pair of leak-proof walls 7 and 7 ′ is folded in two. The portions of the first fold line a1 and the second fold line a2 generated in the individual packaging form have folds 7a1, 7a2, 7a1 ′, 7a2 ′, respectively. Therefore, when the stretchable sheets 6 and 6 ′ contract, at least the pair of hollow leak-proof walls 7 and 7 ′ positioned in the excretion portion region a stand in a loop shape having a substantially circular cross section as shown in FIG. 2. . The pair of hollow leak-proof walls 7 and 7 ′ located at least in the excretion part region a stand up in a loop shape having a substantially circular cross section, thereby improving fit to the wearer and movement of the wearer's foot. Even when stress is applied from the left and right, etc., it is buffered by a hollow loop shape, and the sanitary napkin 1A is not twisted. Therefore, the sanitary napkin 1 </ b> A is a napkin with high leakage prevention properties.

  Moreover, the said leak-proof wall 7 and 7 'of the loop shape of the sanitary napkin 1A of 1st Embodiment has the outer side folding part 72 in each longitudinal direction both ends a1 and a2 of the excretion part area | region a. Therefore, the pair of hollow leak-proof walls 7 and 7 ′ located in the excretion part region “a” are difficult to fall inward and can stably maintain the hollow loop shape.

Moreover, the loop-shaped leak-proof walls 7 and 7 ′ of the sanitary napkin 1 </ b> A of the first embodiment have inner side folding portions 71 at both longitudinal ends a <b> 1 and a <b> 2 of the excretory part region a. Therefore, when viewed in plan after use of the sanitary napkin 1A, the leak-proof walls 7 and 7 'can shield the dirt on the leak-proof walls 7 and 7' due to body fluid, so that the feeling of use of the sanitary napkin 1A is improved. .
In addition, since the loop-shaped leak-proof walls 7 and 7 ′ of the sanitary napkin 1 </ b> A according to the first embodiment have the inwardly-folded portion 71, a pair of hollow barriers located in the excretory region a. Gives a sense of security that the standing property of the leak walls 7 and 7 'has been improved. Moreover, since the shape of the elastic sheet 6 becomes easy to be recognized when the elastic sheet 6 is colored, the impression quality of standing can be improved.
In the leak-proof wall 7 of the sanitary napkin 1A of the first embodiment, as shown in FIG. 3 (a), the outer side folding part 72 is formed to have a longer folding than the inner side folding part 71. Therefore, even when stress is applied due to the movement of the wearer's foot in the excretion area, the leak-proof wall is unlikely to fall on the absorbent body, and the absorbent surface can be secured and maintained widely.

  In addition, as shown in FIG. 3A, the elastic member 63 is provided at each of the distal end of the inward folding portion 71 and the distal end of the outer folding portion 72 of the sanitary napkin 1A of the first embodiment. Therefore, the elastic member 63 becomes a flexible shaft, and the leak-proof walls 7 and 7 ′ can be easily folded inward and outward at the longitudinal ends a1 and a2 of the excretory part region a. Rarely formed.

  Further, each of the leak-proof walls 7 and 7 'of the sanitary napkin 1A according to the first embodiment, as shown in FIG. 1 and FIG. 3 (a), in the folded portions 7a1, 7a2, 7a1', and 7a2 ' Since it is located outward in the width direction (perpendicular to the longitudinal center line CL) from the joint 8 between the stretchable sheets 6, 6 'and the absorbent main body 5, the movement of the wearer's foot in the excretion region When the stress is applied, the loop-shaped buffering capacity is high with respect to the stress from the left-right direction, and the fall of the leak-proof wall onto the absorber can be suppressed.

  In addition, each of the leak-proof walls 7 and 7 ′ of the sanitary napkin 1 </ b> A of the first embodiment is separated from the absorber 4 in the rear area b as shown in FIGS. 3 (a) and 3 (b). Since the space is formed, the liquid absorbed by the absorber 4 does not ooze out through the leak-proof walls 7 and 7 '.

  Furthermore, the back sheet 3 and the stretchable sheet 6 may be joined to each other on the outer side in the width direction (direction orthogonal to the CL direction) from the joint point with the stretchable sheet 6 on the back surface of the absorber 4.

Next, a sanitary napkin according to a second embodiment of the present invention will be described with reference to FIG.
About the sanitary napkin 1B of 2nd Embodiment, a different point from the sanitary napkin 1A of 1st Embodiment is demonstrated. The points that are not particularly described are similar to the sanitary napkin 1A of the first embodiment, and the description of the sanitary napkin 1A of the first embodiment is applied as appropriate.

  As shown in FIG. 1, the leak-proof wall 7 of the sanitary napkin 1 </ b> B according to the second embodiment is folded into a first fold line a <b> 1 part and a second fold line a <b> 2 part generated in the case of a two-fold individual form. 7a1 and 7a2 are provided. As shown in FIG. 4, each of the folded portions 7a1 and 7a2 has a part of the loop-shaped leakage prevention wall 7 from the inner side d of the sanitary napkin 1B in the width direction (perpendicular to the longitudinal center line CL). It has an inward folding part 71 formed by being folded inward of the leak-proof wall 7. As shown in FIG. 4, the surfaces of the sheet 61 on the skin contact surface side of the inward folding portion 71 are joined together by an adhesive. As shown in FIG. 4, elastic members 63 are respectively arranged at the distal ends of the inward folding portions 71.

  As shown in FIGS. 1 and 4, the leak-proof wall 7 is formed in the width direction (longitudinal direction) of the sanitary napkin 1 </ b> A from the joint portion 8 between the stretchable sheet 6 and the absorbent main body 5 in the folding portions 7 a 1 and 7 a 2. It is located outward (in the direction orthogonal to the center line CL). As shown in FIG. 4, the lower end portion 71 a on the skin contact surface side of the inner side folding part 71 formed by folding the leak-proof wall 7 inward is a non-skin of the inner side folding part 71. The sanitary napkin 1A is located outward in the width direction (perpendicular to the longitudinal center line CL) from the lower end portion 71b on the contact surface side (side edge portion 8a on the inner side in the longitudinal direction of the joint portion 8).

Next, the effect at the time of using the sanitary napkin of 2nd Embodiment of this invention mentioned above is demonstrated.
As shown in FIG. 4, the sanitary napkin 1 </ b> B of the second embodiment includes a pair of leak-proof walls 7 and 7 ′, and each of the pair of leak-proof walls 7 and 7 ′ is a two-fold individual packaging form. Folded portions 7a1, 7a2, 7a1 ′ and 7a2 ′ are respectively provided in the first fold line a1 and the second fold line a2 generated at the time. Therefore, when the stretchable sheets 6 and 6 ′ contract, at least the pair of hollow leak-proof walls 7 and 7 ′ positioned in the excretion portion region a stand in a loop shape having a substantially circular cross section as shown in FIG. 2. .
Therefore, the sanitary napkin 1B of the second embodiment can improve the fit to the wearer and can improve the twist prevention and the leakage prevention property similarly to the sanitary napkin 1A of the first embodiment.

In addition, the leak-proof walls 7 and 7 ′ of the loop shape of the sanitary napkin 1 </ b> B of the second embodiment are respectively formed on the first fold line a <b> 1 and the second fold line a <b> 2 generated in the case of the two-fold individual form. Since the inner side folding part 71 is provided, when the sanitary napkin 1B is used in plan view, the leakage preventing walls 7, 7 'can shield the dirt on the leakage preventing walls 7, 7' due to body fluid. The usability of the sanitary napkin 1B is improved.
In addition, since the loop-shaped leak-proof walls 7 and 7 ′ of the sanitary napkin 1 </ b> B of the second embodiment have the inwardly-folded portion 71, a pair of hollow barriers located in the excretory region a. It is possible to give a sense of security that the standing property of the leak walls 7 and 7 'is improved.

Next, a sanitary napkin 1C according to a third embodiment of the present invention will be described with reference to FIG.
Regarding the sanitary napkin 1C of the third embodiment, differences from the sanitary napkin 1A of the first embodiment will be described. The points that are not particularly described are similar to the sanitary napkin 1A of the first embodiment, and the description of the sanitary napkin 1A of the first embodiment is applied as appropriate.

  As shown in FIG. 1, the leak-proof wall 7 of the sanitary napkin 1 </ b> C of the third embodiment is formed on each of the first fold line a <b> 1 and the second fold line a <b> 2 generated in the case of the two-fold individual form, Folding portions 7a1 and 7a2 are provided. As shown in FIG. 5, each of the folded portions 7a1 and 7a2 has a part of the loop-shaped leakage prevention wall 7 from the outer side e in the width direction of the sanitary napkin 1C (perpendicular to the longitudinal centerline CL). The outer side folding part 72 formed by being folded inward of the leak-proof wall 7 is provided. As shown in FIG. 5, the surfaces of the sheet 61 on the skin contact surface side of the outward folding portion 72 are joined together by an adhesive. As shown in FIG. 5, elastic members 63 are respectively arranged at the distal ends of the outward folding portions 72.

  As shown in FIGS. 1 and 5, the leak-proof wall 7 is formed in the width direction (longitudinal direction) of the sanitary napkin 1 </ b> A from the joint portion 8 between the stretchable sheet 6 and the absorbent main body 5 in the folding portions 7 a 1 and 7 a 2. It is located outward (in the direction orthogonal to the center line CL). Here, the fact that it is located outward in the width direction from the joint 8 means that the leak-proof wall 7 is more sanitary than the side edge 8a on the inner side in the longitudinal direction of the joint 8 as shown in FIG. It means that the napkin 1A is located outward in the width direction (direction perpendicular to the longitudinal center line CL).

Next, the effect at the time of using the sanitary napkin of 3rd Embodiment of this invention mentioned above is demonstrated.
As shown in FIG. 5, the sanitary napkin 1 </ b> C of the third embodiment includes a pair of leak-proof walls 7 and 7 ′, and each of the pair of leak-proof walls 7 and 7 ′ is a two-fold individual packaging form. Folded portions 7a1, 7a2, 7a1 ′ and 7a2 ′ are respectively provided in the first fold line a1 and the second fold line a2 generated at the time. Therefore, when the stretchable sheets 6 and 6 ′ contract, at least the pair of hollow leak-proof walls 7 and 7 ′ positioned in the excretion portion region a stand in a loop shape having a substantially circular cross section as shown in FIG. 2. .
Accordingly, the sanitary napkin 1C according to the third embodiment can improve the fit to the wearer, and can prevent twisting and leakage prevention, similarly to the sanitary napkin 1A according to the first embodiment.

  In addition, the leak-proof walls 7 and 7 ′ of the loop shape of the sanitary napkin 1 </ b> C of the third embodiment are respectively provided in the first fold line a <b> 1 and the second fold line a <b> 2 that are generated in the case of the two-fold individual form. Since the outer side folding part 72 is provided, the pair of hollow leak-proof walls 7 and 7 ′ located in the excretion part region a is not easily collapsed inward and stably maintains the hollow loop shape. Can do.

  The absorbent article of this invention is not restrict | limited to the sanitary napkin of the above-mentioned 1st-3rd embodiment at all, It can change suitably. Moreover, each component in the sanitary napkin of the above-mentioned 1st-3rd embodiment can be implemented suitably combining in the range which does not impair the meaning of this invention.

  For example, in the sanitary napkins 1 </ b> A, 1 </ b> B, and 1 </ b> C of the first to third embodiments described above, the stretchable sheet 6 that forms the leak-proof wall 7 is one in the longitudinal direction of the stretchable sheet 6 as shown in FIG. 2. Although the surface of the sheet 61 on the skin contact surface side of the side portion 6a is joined to the surface of the surface sheet 2 on the skin contact surface side, as shown in FIG. The surface of the sheet 62 on the non-skin contact surface side of the portion 6a may be bonded to the surface of the top sheet 2 on the skin contact surface side.

  Moreover, in the sanitary napkins 1A, 1B, and 1C of the first to third embodiments described above, the adhesive is provided on the surface of the back sheet 3, and the displacement is stopped, but the wing is provided on the back sheet 3 side, Thereby, the mounting and fixing may be easy.

  In the sanitary napkins 1A, 1B, and 1C of the first to third embodiments described above, the elastic member 63 is disposed at the distal end of the inner folding portion 71 or the distal end of the outer folding portion 72, respectively. However, the elastic member 63 may not be disposed.

  In the sanitary napkins 1A, 1B, and 1C of the first to third embodiments described above, the top sheet 2 and the back sheet 3 do not extend from both ends of the absorbent body 4 in the width direction, and the elastic sheet 6 The surface of the sheet 62 on the non-skin contact surface side of the other side portion 6b in the longitudinal direction is joined to the surface of the absorbent body 4 on the non-skin contact surface side. The surface of the sheet 62 on the non-skin contact surface side in the other side portion 6b is extended and joined from both ends in the width direction of the absorbent body 4, and the surface on the skin contact surface side of the surface sheet 2 of the extended portion It may be joined to.

  In addition, the sanitary napkins 1A, 1B, and 1C of the first to third embodiments described above have the folded portions 71 and 72 formed by being folded. The surfaces of the sheets 61 on the skin contact surface side of the folding parts 71 and 72 are joined by an adhesive as shown in FIGS. 3A, 4 and 5, but are joined by an adhesive. Even if not, it may be joined by heat seal or hot melt at the front and rear ends of the product.

  In addition to sanitary napkins, the absorbent article of the present invention can be suitably used for disposable diapers, incontinence pads, panty liners, and the like.

It is a perspective view of the sanitary napkin which is 1st Embodiment of this invention. It is the X1-X1 sectional view taken on the line of the sanitary napkin shown in FIG. (A) It is the X2-X2 sectional view taken on the line of the sanitary napkin shown in FIG. (B) It is the X3-X3 sectional view taken on the line of the sanitary napkin shown in FIG. It is the X2-X2 sectional view taken on the line of the sanitary napkin which is 2nd Embodiment of this invention. It is the X2-X2 sectional view taken on the line of the sanitary napkin which is 3rd Embodiment of this invention. It is the X1-X1 sectional view taken on the line of the sanitary napkin which is other embodiment of this invention.

Explanation of symbols

1A, 1B, 1C Sanitary napkin 2 Top sheet 3 Back sheet 4 Absorber 5 Absorbent body 5a, 5a 'Both side parts 6 and 6' of the absorbent body in the longitudinal direction 61 Sheet on the skin contact surface side 62 Non Skin contact surface side sheet 63, 63 'Elastic member 6a One side part 6b Other side part 7, 7' Leak-proof wall 7a1, 7a1 'Folded part 7a2, 7a2' Excretion part area in rear end part a1 of excretion part area 71 a inner side folding part 71 a lower end part 71 b on the skin contact surface side of the inner side folding part 71 b lower end part on the non-skin contact surface side of the inner side folding part 72 outer side folding Part 8, 8D Joint part 8a Side edge part on the inner side in the longitudinal direction of the joint part 8b Side edge part on the outer side in the longitudinal direction of the joint part 9 Emboss groove a Excretion part area a1 Rear end part of the excretion part area a2 Excretion part area Front end b Rear behind rear part a Area c Front area d in front of the excretory part area a Inner side e Outer side CL Center line extending in the longitudinal direction of the sanitary napkin

Claims (3)

Longitudinal absorbent main body comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorber interposed between both sheets, and the longitudinal direction of the absorbent body An absorbent article having a leak-proof wall formed on both sides,
Each of the leak-proof walls joins one side part and the other side part in the longitudinal direction of the elastic sheet to the absorbent main body at the joint part, and also absorbs the elastic sheet in front and rear of the excretion part region. Formed by joining to the main body, standing in the form of a hollow loop in the excretion area,
The joint part of each of the loop-shaped leak-proof walls in the excretory part region is joined to the one side part of the stretchable sheet on the skin contact surface side in the side part in the longitudinal direction of the absorbent main body, The other side portion of the stretchable sheet is joined to the non-skin contact surface side in the longitudinal side portion of the absorbent main body,
Each of the leak-proof walls has a part of the loop-shaped leak-proof wall at the front side and / or the inner side in the width direction of the absorbent article in at least one of the front and rear of the loop-shaped part. An absorbent article having a folded portion that is folded inward from the side into the leak-proof wall.   2. The folded portion is formed by folding a part of the loop-shaped leak-proof wall from the outer side and the inner side in the width direction of the absorbent article to the inside of the leak-proof wall. Absorbent article as described in 1.   The absorptive article according to claim 1 or 2 in which said fold part has an elastic member in the tip of a fold part folded inward.

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