JP6350337B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorptive article which is disposed in a crotch of a wearer and absorbs and holds a liquid such as urine.

  2. Description of the Related Art Absorbent articles that are worn on the inseam of a wearer for the purpose of absorbing and retaining excreted body fluids, such as disposable diapers, urine absorption pads, absorption pads, or sanitary napkins, have been known. Yes. A typical absorbent article has an absorbent main body configured by disposing an absorbent body between a liquid-permeable top sheet and a liquid-impermeable back sheet. Moreover, as for a general absorbent article, a pair of three-dimensional gathers which stand up toward the direction contact | abutted to a wearer's skin are formed in the both right and left sides of an absorptive main body (patent documents 1-3 etc.).

  The pair of three-dimensional gathers stands on both the left and right sides of the absorber, and functions as a leak-proof wall for preventing urine leakage. A three-dimensional gather is generally formed by stacking and joining side sheets on a top sheet and fixing an elastic elastic member (such as rubber thread) to the inner end of the side sheet in an expanded state. When the elastic expansion / contraction member contracts, the inner end portion of the side sheet rises due to the contraction force of the elastic expansion / contraction member, and a gather is formed at a site where the elastic expansion / contraction member contracts. Thereby, a side sheet becomes a three-dimensional gather.

  Further, in conventional absorbent articles, generally, elastic elastic members are fixed over almost the entire region in the longitudinal direction of the side sheet. For this reason, a wrinkle will be formed over the substantially whole area of a side seat | sheet. Thus, the conventional absorbent article tried to improve the touch of a three-dimensional gather by forming a wrinkle in a wide range of side sheets.

Japanese Patent Laid-Open No. 10-243960 JP 2007-000339 A JP 2013-123447 A

  By the way, the three-dimensional gather formed in the absorbent article rises when the elastic elastic member attached to the side seat contracts. Further, when the absorbent article is mounted, it is preferable that the tip of the three-dimensional gather is brought into contact with the skin of the wearer's crotch in a state where the three-dimensional gather is set up in this way. However, when the absorbent article is mounted, since the absorbent article is stretched along the longitudinal direction, the elastic stretchable member attached to the side sheet tends to be stretched along the longitudinal direction. As described above, when the elastic elastic member is stretched, the three-dimensional gather falls, and it is difficult to attach the absorbent article to the wearer's inseam so that the tip of the three-dimensional gather touches the wearer's skin. It had been. In addition, if the absorbent article is attached in a state where the elastic elastic member is stretched and the three-dimensional gather is collapsed, the three-dimensional gather remains in a crushed state, and thereafter, the three-dimensional gather is difficult to stand up. It was. For this reason, for example, after an absorbent article is attached to the wearer's crotch, a work may be performed in which a finger is inserted into the crotch part and a three-dimensional gather is erected. There is a risk of soiling or damaging the wearer's skin.

  Therefore, the present invention aims to provide a technique for making it easy to start up a three-dimensional gather when an absorbent article is mounted.

  The inventor of the present invention, as a result of earnestly examining the means for solving the above-described problems, as a result of the side sheet constituting the three-dimensional gather, the auxiliary that can expand and contract so as to straddle the boundary between the joining area and the standing area of the side sheet An elastic member was attached. By providing such an auxiliary elastic member, when the auxiliary elastic member contracts, the three-dimensional gather can be easily started up. Then, the present inventor has come up with the idea that the conventional problems can be solved based on the above knowledge, and completed the present invention. More specifically, the present invention has the following configuration.

The present invention relates to an absorbent article such as a disposable diaper.
The absorbent article of the present invention includes an absorbent main body 10 and a pair of left and right side sheets 20. The absorbent main body 10 is divided in the longitudinal direction into a front body 1 in contact with the wearer's abdomen, a back body 2 in contact with the back of the wearer, and a crotch 3 positioned therebetween. The pair of side sheets 20 are sheet members disposed on the left and right sides in the width direction of the absorbent main body 10 on the skin facing surface side of the absorbent main body 10.
The pair of side sheets 20 includes a joining line 21, a joining region 22, and a standing region 23. The joining line 21 is a line extending along the longitudinal direction of the absorbent main body 10, and corresponds to a boundary line between the joining region 22 and the standing region 23. The bonding region 22 is a bonding region 22 that is bonded to the skin facing surface of the absorbent main body 10 outside the bonding line 21 in the width direction. The standing region 23 is a region on the inner side in the width direction from the bonding line 21.
The standing region 23 includes joint portions 23a and 23b and a free portion 23c. The joint portions 23a and 23b are portions joined to the skin facing surface of the absorbent main body 10 on both front and rear end sides in the longitudinal direction. The free part 23c is a part which is located between the longitudinal directions of the joint parts 23a and 23b and is not joined to the skin facing surface of the absorbent main body 10. The free portion 23c stands up away from the absorbent main body 10, whereby a three-dimensional gather is formed.
Here, the absorbent article of the present invention further includes an auxiliary elastic member 30. At least one auxiliary elastic member 30 is attached to each of the pair of side sheets 20.
The auxiliary elastic member 30 has a proximal end 31 located in the joining region 22 and a distal end 32 located in the free portion 23 c of the standing region 23. And the auxiliary | assistant elastic member 30 is being fixed to the side seat | sheet 20 in the state which can be expanded-contracted in the direction straddling the joining line 21. FIG.

  As in the above configuration, the auxiliary elastic member 30 is fixed from the joining region 22 to the free portion 23c of the standing region 23 so as to straddle the joining line 21 of the side seat 20, so that the free portion 23c of the side seat 20 is secured. Can be made to stand up easily. That is, since the auxiliary elastic member 30 is fixed to the side seat 20 in an extended state, when the auxiliary elastic member 30 contracts, the free portion 23c of the side seat 20 is pulled, and the wearer's skin is exposed. Stand up in the direction that exists. Thereby, when wearing an absorbent article or the like, the three-dimensional gathering is easily raised, and the tip portion of the three-dimensional gather can be fitted to the wearer's inseam.

  In the absorbent article of the present invention, the auxiliary elastic member 30 includes a front auxiliary elastic member 30a provided on the front body 1 side and a rear auxiliary elastic member 30b provided on the back body 2 side. Preferably it is. In this case, the front side auxiliary elastic member 30a and the rear side auxiliary elastic member 30b are respectively attached to the side seat 20 so as to be inclined obliquely because the distal end 32 is positioned closer to the crotch part 3 than the base end 31. It is preferably fixed.

  Although general three-dimensional gathers are easy to stand up near the crotch, they are difficult to stand up near the front and back parts. For this reason, the whole three-dimensional gather can be effectively started by arrange | positioning the front side auxiliary | assistant elastic member 30a and the rear side auxiliary | assistant elastic member 30b in the part near this front body and the back body, respectively. Further, by arranging the front side auxiliary elastic member 30a and the rear side auxiliary elastic member 30b obliquely, it is possible to more effectively stand the front body part and the rear body part.

  In the absorbent article of the present invention, the auxiliary elastic member 30 preferably includes a central auxiliary elastic member 30c provided between the front auxiliary elastic member 30a and the rear auxiliary elastic member 30b in the longitudinal direction.

  As described above, by disposing the central auxiliary elastic member 30c in the vicinity of the crotch part 3 of the absorbent article, it is possible to stand up so as to spread the solid gathers outward.

  The absorbent article of the present invention includes a three-dimensional gather stretchable member 40 fixed to a free portion 23c of a pair of side sheets 20 in an elongated state along the longitudinal direction. In this case, it is preferable that some of the front auxiliary elastic members 30a and the rear auxiliary elastic members 30b do not intersect with the three-dimensional gather elastic member 40.

  When the front side auxiliary elastic member 30a and the rear side auxiliary elastic member 30b intersect with the three-dimensional gather elastic member 40, they may interfere with each other at the intersection and may not efficiently contract. On the other hand, by arranging the front auxiliary elastic member 30a and the rear auxiliary elastic member 30b so as not to intersect with the three-dimensional gather elastic member 40 as in the above configuration, the contraction force of each elastic member can be effectively increased. It can be used to erect solid gathers.

  The absorbent article of the present invention further includes a leg gather elastic member 50 in the joining region 22 of the pair of side sheets 20. The leg gather elastic member 50 is preferably fixed to the side seat 20 in an extended state along the longitudinal direction. In this case, it is preferable that some of the front auxiliary elastic members 30a and the rear auxiliary elastic members 30b do not intersect the leg gather elastic members 50.

  By disposing the front auxiliary elastic member 30a and the rear auxiliary elastic member 30b so as not to intersect with the leg gather elastic member 50 as in the above configuration, it is possible to prevent the contraction force of each elastic member from interfering with each other.

  According to the present invention, it is possible to easily start up a three-dimensional gather when an absorbent article is mounted.

FIG. 1 is a perspective view showing an embodiment of an absorbent article according to the present invention. FIG. 2 is a plan view showing an embodiment of an absorbent article according to the present invention. 3 is a cross-sectional view of the absorbent article taken along line XX in FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.

In the present specification, the “longitudinal direction” means a direction connecting the front body and the back body of the absorbent article. The “width direction” means a direction orthogonal to the longitudinal direction in a plane. In the drawings of the present application, the “longitudinal direction” is indicated by the Y axis, and the “width direction” is indicated by the X axis.
In the present specification, the “skin facing surface” means a surface facing the wearer's skin when the absorbent article is worn. The “non-skin facing surface” means a surface that does not face the wearer's skin when the absorbent article is worn, that is, a surface opposite to the skin facing surface.
In the present specification, “A to B” means “A or more and B or less”.

  FIG. 1 shows an absorbent article according to an embodiment of the present invention. In the example shown in FIG. 1, the absorbent article is a tape-type disposable diaper. As shown in FIG. 1, the tape-type disposable diaper is a type of disposable diaper that is worn by fastening fastening tapes attached to both sides of the back body to the front body. Below, a tape type disposable diaper is mentioned as an example and the absorptive article of the present invention is explained in detail. However, the present invention is not limited to a tape-type disposable diaper. For example, the present invention is worn on the wearer's crotch for the purpose of absorbing and holding excreted body fluids such as pants-type disposable diapers, urine-absorbing pads, absorbent pads, or sanitary napkins. It can be widely applied to absorbent articles.

  With reference to FIGS. 1-3, embodiment of the absorbent article 100 of this invention is described. FIG. 1 is a perspective view showing an absorbent article 100 according to the embodiment, and FIG. 2 is a development view showing the absorbent article 100 according to the embodiment. FIG. 3 is a sectional view taken along line XX in FIG.

  As shown in FIG. 1 and FIG. 2, the absorbent article 100 includes a front body 1 that contacts the abdomen of the wearer, a back body 2 that contacts the back of the wearer, a front body 1 and a back body 2 in the longitudinal direction. It is divided into the crotch part 3 which is located between and touches a wearer's crotch. The absorbent article 100 includes an absorbent main body 10 and a pair of left and right side sheets 20. As shown in the sectional view of FIG. 3, the absorbent main body 10 includes a top sheet 11, a back sheet 12, and an absorbent body 13 interposed between these sheets 11 and 12. Further, a pair of three-dimensional gathers are formed by the pair of side sheets 20 on both the left and right sides of the absorbent main body 10 in the width direction. In FIG. 3, each sheet member is given a thickness in order to make the structure of the absorbent article easier to understand, but each actual sheet member is a very thin sheet-like member.

  First, the basic configuration of the absorbent main body 10 will be described. The top sheet 11 constituting the absorbent main body 10 is a member that is in direct contact with the skin of the wearer's crotch and allows liquid such as urine to pass through the absorbent body 13. For this reason, the top sheet 11 is made of a liquid-permeable material having high flexibility. Moreover, the top sheet 11 is arrange | positioned so that the skin opposing surface of the absorber 13 may be coat | covered. Examples of the liquid permeable material constituting the top sheet 11 are a woven fabric, a non-woven fabric, or a porous film. Moreover, as the top sheet 11, it is good also as, for example, using the fiber of the thermoplastic resin like polypropylene, polyethylene, polyester, nylon, and making it the nonwoven fabric further, and making it into a nonwoven fabric.

  The back sheet 12 is a member for preventing the liquid that has passed through the top sheet 11 and absorbed by the absorber 13 from leaking to the outside of the diaper. For this reason, the back sheet 12 is made of a liquid-impermeable material. Further, the back sheet 12 covers the non-skin facing surface of the absorber 13 in order to prevent liquid leakage from the bottom surface of the absorber 13. Also, as shown in FIG. 3, the back sheet 12 is formed wider than the top sheet 11, and the left and right ends of the back sheet 12 extend outward from the left and right side edges of the top sheet 11. Preferably it is. An example of the impermeable material constituting the back sheet 12 is a liquid impermeable film made of polyethylene resin. In particular, as the back sheet 12, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed in order to ensure air permeability while maintaining liquid impermeability.

  The absorber 13 is a member for absorbing liquid such as urine and holding the absorbed liquid. The absorber 13 is disposed between the liquid-permeable top sheet 11 and the liquid-impermeable back sheet 12. The absorber 13 can be comprised with a well-known absorptive material. As an absorptive material, it is good also as using a fluff pulp, a super absorbent polymer, or a hydrophilic sheet, for example. In addition, as the absorbent material, one kind of fluff pulp, a super absorbent polymer, or a hydrophilic sheet may be used alone, or two or more kinds may be used in combination. The absorbent material is usually used in the form of a single layer or a plurality of layers. As shown in FIGS. 1 to 3, the top sheet 11 and the back sheet 12 are joined to each other around the absorber 13. As a result, the absorber 13 is surrounded by the joint between the top sheet 11 and the back sheet 12.

  Next, a structure for forming a three-dimensional gather will be described in detail. As shown in FIG. 1 to FIG. 3, a pair of side sheets 20 are superimposed on the left and right sides in the width direction on the skin facing surface side of the absorbent main body 10 over the entire longitudinal direction. The pair of side sheets 20 is a sheet member that stands along both side edges of the absorbent body 13 and forms a three-dimensional gather that prevents side leakage of urine. For example, as the sheet member constituting the side sheet 20, it is preferable to employ a sheet member having water repellency and air permeability. As the side sheet 20, for example, a non-woven sheet obtained by a method such as card embossing or spunbonding can be used, and it is particularly preferable to use a non-woven sheet such as SMS or SMMS having high waterproofness and air permeability.

  As shown in FIGS. 2 and 3, the pair of side sheets 20 includes a joining line 21, a joining region 22, and a standing region 23, respectively. The joining line 21 of the side sheet 20 is formed in a straight line extending straight along the longitudinal direction, and serves as a boundary line between the joining region 22 and the standing region 23. Further, as shown in FIG. 3, the joining line 21 of the side sheet 20 is preferably formed on the skin facing surface of the top sheet 11.

  The joining region 22 of the side sheet 20 is a region located outside the joining line 21 in the width direction. In the joining region 22, the side sheet 20 is entirely joined on the skin facing surface of the absorbent main body 10. As shown in FIG. 3, in the joining region 22, the side sheet 20 is preferably joined on the skin facing surface of the top sheet 11. When the left and right ends of the back sheet 12 extend from the top sheet 11, the side sheet 20 is preferably bonded to the skin facing surface of the back sheet 12 in the bonding region 22. Thus, the side sheet 20 is hardly peeled off from the absorbent main body 10 by bonding the side sheet 20 to both the top sheet 11 and the back sheet 12.

  The standing region 23 of the side sheet 20 is a region located on the inner side in the width direction than the bonding line 21. The standing region 23 is divided into joint portions 23a and 23b located on both front and rear ends in the longitudinal direction and a free portion 23c located between the joint portions 23a and 23b when viewed in the longitudinal direction. In the joint portions 23a and 23b at the front and rear ends, the side sheet 20 is joined to the skin facing surface of the absorbent main body 10 (top sheet 11). In FIG. 2, in order to show the joint portions 23a and 23b in an easy-to-understand manner, the joint portions 23a and 23b are conceptually shaded. On the other hand, in the free part 23c located between the joining parts 23a and 23b, the side sheet 20 is not joined on the skin facing surface of the absorbent main body 10. For this reason, the side seat 20 is separated from the absorbent main body 10 in the free portion 23c of the standing region 23, and can stand up freely. The free portion 23c of the standing region 23 is a portion that forms a three-dimensional gather. For this reason, it is preferable that the free portion 23c of the standing region 23 is formed to have a length that reaches at least the entire crotch 3 and reaches the front body 1 and the back body 2 when viewed in the longitudinal direction.

  For example, a known hot melt adhesive may be used for joining the sheet in the joining region 22 of the side sheet 20 and the joining portions 23a and 23b of the standing region 23 described above.

  Further, as shown in FIG. 3, the standing region 23 of the side seat 20 preferably has a folded portion 24 in which the edge on the inner side in the width direction is folded and the sheet member is overlapped. The folded portion 24 of the side sheet 20 is formed over the entire longitudinal direction of the side sheet 20. The folding | returning part 24 may be formed so that the inner side edge of the side seat | sheet 20 may be turned toward the inner side of the width direction, as FIG. 3 shows. Moreover, although illustration is abbreviate | omitted, the folding | turning part 24 may be formed so that the inner side edge of the side seat | sheet 20 may be folded toward the outer side of the width direction. As shown in FIGS. 1 to 3, one or a plurality of three-dimensional gather expansion / contraction members 40 and one or a plurality of auxiliary expansion / contraction members 30 can be sandwiched and fixed to the folded portion 24 of the side seat 20. .

  As shown in FIGS. 1 to 3, one or a plurality of three-dimensional gather elastic members 40 are attached to the free portions 23 c of the standing regions 23 of the pair of side seats 20. The three-dimensional gather elastic member 40 is fixed to the free portion 23c of the side seat 20 in an elongated state along the longitudinal direction. Specifically, the three-dimensional gather expansion / contraction member 40 is preferably sandwiched and fixed in the folded portion 24 formed in the free portion 23 c of the side seat 20. Thus, since each solid gather expansion-contraction member 40 is being fixed in the extended state, when these solid gather expansion / contraction members 40 contract, the free portion 23c of the side seat 20 contracts in the longitudinal direction. Thereby, the free part 23c of the side seat 20 stands up so that it may leave | separate from the skin opposing surface of the top sheet 11 using the contraction force of the three-dimensional gather expansion-contraction member 40. FIG. Further, when the three-dimensional gather expansion / contraction member 40 contracts, a ridge (gather) is formed in the free portion 23c of the side seat 20 that fixes the three-dimensional gather expansion / contraction member 40. Accordingly, a three-dimensional gather standing up toward the wearer's skin is formed by the free portion 23 c of the side seat 20. When fixing the three-dimensional gather expansion / contraction member 40 to the side sheet 20, the adhesive may be applied directly to the three-dimensional gather expansion / contraction member 40 and fixed to the side sheet 20 in the stretched state (extended state). Moreover, after apply | coating an adhesive agent to the side sheet | seat 20, it is good also as attaching the solid gathering elastic member 40 of the stretched state to the side sheet | seat 20. As shown in FIG. One, two, or three or more three-dimensional gather elastic members 40 can be provided for each side sheet 20.

  As shown in FIGS. 1 to 3, the absorbent article 100 preferably further includes a leg gather elastic member 50. One or a plurality of leg gather elastic members 50 are provided on each of the left and right sides of the absorbent main body 10 in the width direction. As shown in FIG. 2, the leg gather elastic members 50 are arranged in a linear shape, a curved line shape, or a bent line shape in an extended state along the longitudinal direction. The leg gather elastic member 50 is preferably disposed over the front body 1 and the back body 2 with the crotch 3 as the center. Thus, by providing the leg gather elastic member 50, when the absorbent article 100 is mounted, a leg gather is formed in a portion corresponding to the circumference of the wearer's leg. By forming leg gathers, the fit between the wearer's leg and the absorbent article 100 is improved, so that liquid such as urine can be prevented from leaking from the opening around the leg.

  As shown in FIGS. 2 and 3, the left and right leg gather elastic members 50 are fixed between the side sheet 20 and the absorbent main body 10 in the joining region 22 of the side sheet 20. Is preferred. For example, as shown in FIG. 3, in this embodiment, a leg gather elastic member 50 is fixed between a part of the back sheet 12 that extends outward from the top sheet 11 and the side sheet 20. Thus, in the joining area | region 22, it is good also as fixing the 1 or several leg gather expansion-contraction member 50 between the side seat | sheet 20 and the back seat | sheet 12. FIG. Although not shown, the leg gather expansion / contraction member 50 may be fixed between the side sheet 20 and the top sheet 11 in the joining region 22.

  Here, as shown in FIGS. 1 to 3, the absorbent article 100 of the present invention has auxiliary elastic members 30 attached to each of the pair of side sheets 20 one or more. The auxiliary elastic member 30 is an elastic member for assisting the standing of the three-dimensional gather. The auxiliary expansion / contraction member 30 cooperates with the above-described three-dimensional gather expansion / contraction member 40 and plays a role of raising the free portion 23c of the standing region 23 of the side seat 20.

  As shown in FIG. 2, each auxiliary elastic member 30 is basically attached to the side seat 20 in an extended state so as to extend linearly. Specifically, each auxiliary elastic member 30 has a base end 31 positioned on the outer side in the width direction of the absorbent article and a tip end 32 positioned on the inner side in the width direction. It extends linearly so as to connect the tip 32. Further, as shown in FIG. 2, the base end 31 of the auxiliary elastic member 30 is located in the joining region 22 of the side seat 20. On the other hand, the tip 32 of the auxiliary elastic member 30 is located in the free portion 23 c in the standing region 23 of the side seat 20. Thus, the auxiliary elastic member 30 is formed with a length from the joining region 22 of the side sheet 20 to the free part 23c of the standing region 23 beyond the joining line 21. In addition, the auxiliary elastic member 30 is fixed to the side sheet 20 in a state in which the auxiliary elastic member 30 can expand and contract in a direction straddling the joining line 21 of the side sheet 20.

  As described above, by attaching the auxiliary elastic member 30 to the side sheet 20, the auxiliary elastic member 30 pulls the free portion 23 c starting from the joining region 22. Thereby, the three-dimensional gather formed by the free part 23c of the side seat 20 becomes easy to stand up. In particular, the expansion / contraction direction of the three-dimensional gather expansion / contraction member 40 is a direction along the longitudinal direction of the absorbent article 100, whereas the expansion / contraction direction of the auxiliary expansion / contraction member 30 is relative to the expansion / contraction direction of the three-dimensional gather expansion / contraction member 40. It becomes a direction orthogonal or a direction inclined obliquely. For this reason, even when the absorbent article 100 is pulled along the longitudinal direction of the absorbent article 100 at the time of wearing or the like, the three-dimensional gather expansion / contraction member 40 is extended and the three-dimensional gather is difficult to stand up. It can be pulled in the direction to raise the gathers. Therefore, the three-dimensional gather can stand up effectively by the cooperation of the auxiliary elastic member 30 and the three-dimensional gather elastic member 40.

  Further, the auxiliary elastic member 30 is provided for the purpose of raising the free portion 23c of the side seat 20. For this reason, it is preferable that the front-end | tip 32 of the auxiliary | assistant elastic member 30 has reached the edge (front-end edge) inside the width direction of the free part 23c of the side seat | sheet 20 fundamentally. At least the tip 32 of the auxiliary elastic member 30 is preferably located closer to the tip edge than half of the free portion 23c of the side seat 20 in the width direction.

  In the embodiment shown in FIGS. 1 and 2, a plurality of auxiliary elastic members 30 are attached to the side seats 20. In the present embodiment, the plurality of auxiliary elastic members 30 are provided with a front auxiliary elastic member 30a attached to the front body 1 side, a rear auxiliary elastic member 30b attached to the back body 2 side, and a space therebetween. Center auxiliary elastic member 30c.

  As shown in FIG. 2, the front side auxiliary elastic member 30 a and the rear side auxiliary elastic member 30 b are arranged so as to be inclined obliquely with respect to the longitudinal direction of the absorbent article 100. More specifically, the front auxiliary elastic member 30 a has a base end 31 positioned closer to the edge of the front body 1 in the longitudinal direction than the front end 32, and the front end 32 is longer than the base end 31. It is located near the center of the crotch part 3 in the direction. Thereby, the front side auxiliary elastic member 30a is inclined so as to gradually approach the center of the crotch part 3 from the base end 31 toward the tip 32. On the other hand, the rear side auxiliary elastic member 30b has a base end 31 located closer to the edge of the rear body 2 in the longitudinal direction than the tip end 32, and the tip end 32 is longer in the longitudinal direction than the base end 31. It is located near the center of the crotch 3. Accordingly, the rear auxiliary elastic member 30b is also inclined so as to gradually approach the center of the crotch 3 as it goes from the base end 31 to the tip 32. For example, in FIG. 2, the symbol θ indicates an inclination angle in which the front auxiliary elastic member 30 a and the rear auxiliary elastic member 30 b are inclined with respect to a straight line extending in the longitudinal direction of the absorbent article 100. The inclination angle θ is preferably, for example, 15 to 75 degrees, 30 to 60 degrees, or 40 to 50 degrees. In addition, as shown in FIG. 2, the central auxiliary elastic member 30 c is disposed so as to be substantially orthogonal to the longitudinal direction of the absorbent article 100. For example, the angle at which the central auxiliary elastic member 30c is inclined with respect to the straight line extending in the longitudinal direction of the absorbent article 100 is preferably 80 degrees to 100 degrees or about 90 degrees (± 2 degrees).

  As described above, each side seat 20 is provided with a plurality of types of auxiliary elastic members 30a, 30b, 30c, and each auxiliary elastic member 30a, 30b, 30c is pulled to the free portion 23c of the side seat 20 in various directions. Is preferred. As a result, the free portion 23c of the side seat 20 is easily raised, and at the same time, the free portion 23c of the side seat 20 is easily opened outward because the free portion 23c is pulled outward from various directions. As described above, the free portion 23c of the side seat 20 is automatically opened, so that when the absorbent article 100 is mounted, the absorbent material can be absorbed smoothly without performing an operation of spreading the side seat 20 using fingers. The article 100 can be worn.

  In addition, as shown in FIG. 2, a three-dimensional gather expansion / contraction member 40 is disposed in the free portion 23 c of the side seat 20 in the center portion in the longitudinal direction. However, in the free portion 23c of the side seat 20, there is a non-stretchable portion 23d where the three-dimensional gather stretchable member 40 is not disposed in the front body 1 and the back body 2 in the longitudinal direction. In such a case, it is preferable that the front side auxiliary | assistant elastic member 30a and the rear side auxiliary elastic member 30b have the front-end | tip 32 located in the non-expandable part 23d of the free parts 23c of the side seat 20, respectively. Thus, by positioning the front end 32 of the front side auxiliary elastic member 30a and the rear side auxiliary elastic member 30b at the non-extensible part 23d, the front side auxiliary elastic member 30a and the rear side auxiliary elastic member 30b are connected to the three-dimensional gather elastic member 40. It can arrange so that it may not cross. That is, when the front side auxiliary elastic member 30a and the rear side auxiliary elastic member 30b intersect with the three-dimensional gather elastic member 40, when each elastic member contracts, a twist (kink) that does not feel good near the tip of the side seat 20 occurs. May occur. Therefore, it is preferable that at least the front auxiliary elastic member 30a and the rear auxiliary elastic member 30b are arranged so as not to intersect the three-dimensional gather elastic member 40.

  Further, as shown in FIG. 2, the front auxiliary elastic member 30 a and the rear auxiliary elastic member 30 b are arranged so as not to intersect the leg gather elastic member 50. Specifically, in the example shown in FIG. 2, the length of the leg gather elastic member 50 in the longitudinal direction is longer than the length of the solid gather elastic member 40 in the longitudinal direction. For this reason, when the front side auxiliary elastic member 30a and the rear side auxiliary elastic member 30b are arranged so as not to intersect both the leg gather elastic member 50 and the three-dimensional gather elastic member 40, an obliquely inclined arrangement as shown in FIG. Become. In this way, the leg gather elastic member 50 is formed longer than the three-dimensional gather elastic member 40, and the front auxiliary elastic member 30a and the rear auxiliary elastic member 30b are arranged diagonally, thereby balancing the arrangement of the elastic members. Can take. In other words, the gap between the elastic members is not too far away and is not too close, and the entire absorbent article 100 can be easily expanded and contracted in all directions. Thereby, the mounting | wearing property and fitting property of the absorbent article 100 whole can be improved.

  FIG. 3 is a cross-sectional view in the width direction of the absorbent article 100 at a portion where the auxiliary elastic member 30 (central auxiliary elastic member 30c) is disposed. As shown in FIG. 3, each auxiliary elastic member 30 is preferably attached to the skin non-facing surface side of the side seat 20. Specifically, in the joining region 22 of the side sheet 20, the auxiliary elastic member 30 is sandwiched and fixed between the side sheet 20 and the top sheet 11 or between the side sheet 20 and the back sheet 12. Further, in the standing region 23 of the side seat 20, the auxiliary elastic member 30 is sandwiched and fixed by the folded portion 24 of the side seat 20. Thus, it is preferable that each auxiliary | assistant elastic member 30 is attached to the skin non-opposing surface side of the side seat | sheet 20 so that a wearer's skin may not be touched directly.

  As the auxiliary elastic member 30, the three-dimensional gather elastic member 40, and the leg gather elastic member 50, known elastic elastic members can be used. For example, thread elastic rubber or flat elastic rubber can be applied to each elastic elastic member. As such a rubber member, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, or polyester can be used. In addition, for each elastic member, a known member having elasticity such as a thermoplastic elastomer, a plastic sheet, or a rubber sheet can be used.

  As mentioned above, in this specification, in order to express the content of this invention, embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  The present invention relates to an absorbent article such as a disposable diaper, an absorbent pad, or a sanitary napkin. Therefore, this invention can be utilized suitably in the manufacturing industry of an absorbent article.

DESCRIPTION OF SYMBOLS 1 ... Front body 2 ... Back body 3 ... Crotch part 10 ... Absorbent main body 11 ... Top sheet 12 ... Back sheet 13 ... Absorbent body 20 ... Side sheet 21 ... Joining line 22 ... Joining area 23 ... Standing area 23a ... Front end side Joint part 23b ... Rear end side joint part 23c ... Free part 23d ... Non-stretchable part 24 ... Folding part 30 ... Auxiliary elastic member 30a ... Front auxiliary elastic member 30b ... Rear auxiliary elastic member 30c ... Central auxiliary elastic member 31 ... Base End 32 ... Tip 40 ... Solid gather elastic member 50 ... Leg gather elastic member 100 ... Absorbent article

Claims (3)

A front body (1) in contact with the wearer's abdomen, a back body (2) in contact with the back of the wearer, and a crotch part (3) positioned between the front body (1) and the back body (2); An absorptive body (10) sectioned longitudinally;
A pair of side sheets (20) disposed on the left and right sides in the width direction of the absorbent main body (10) on the skin facing surface side of the absorbent main body (10),
The pair of side sheets (20)
A joining line (21) extending along the longitudinal direction;
A joining region (22) joined to the skin-facing surface of the absorbent main body (10) outside the joining line (21) in the width direction;
An upright region (23) on the inner side in the width direction than the joint line (21),
The standing area (23) is
Bonded portions (23a, 23b) bonded to the skin-facing surfaces of the absorbent main body (10) at both front and rear ends in the longitudinal direction;
An absorbent article including a free portion (23c) located between the longitudinal directions of the joint portions (23a, 23b) and not joined to the skin facing surface of the absorbent main body (10),
An auxiliary elastic member (30) attached to each of the pair of side sheets (20) at least one ;
A three-dimensional gather expansion / contraction member (40) fixed to the free portion (23c) of the pair of side sheets (20) in an extended state along the longitudinal direction ;
The auxiliary telescopic member (30) has a proximal end (31) located in the joining region (22) and a distal end (32) located in the free portion (23c) of the standing region (23), It is fixed to the side seat (20) in a state in which it can be expanded and contracted in a direction across the joining line (21) ,
The auxiliary elastic member (30) includes
A front auxiliary elastic member (30a) provided on the front body (1) side;
A rear auxiliary elastic member (30b) provided on the back body (2) side, and
The front auxiliary elastic member (30a) and the rear auxiliary elastic member (30b) are such that the tip (32) is positioned closer to the crotch part (3) than the base end (31), respectively. It is fixed to the side seat (20) so as to be inclined obliquely,
The front auxiliary elastic member (30a) and the rear auxiliary elastic member (30b) are absorbent articles that do not intersect with the three-dimensional gather elastic member (40) . The auxiliary elastic member (30) includes
In the longitudinal direction, a central auxiliary elastic member (30c) provided between the front auxiliary elastic member (30a) and the rear auxiliary elastic member (30b) is included.
The absorbent article according to claim 1. A leg gather expansion / contraction member (50) fixed to the joining region (22) of the pair of side sheets (20) in an extended state along the longitudinal direction;
The front auxiliary elastic member (30a) and the rear auxiliary elastic members (30b), the absorbent article according to claim 1 which does not intersect with the leg gathers elastic member (50).

Images