JP4522308B2 - Disposable diaper and method for producing the same - Google Patents

Description

  The present invention relates to a disposable diaper having a clean appearance when worn, good solid formation by standing up an absorbent body at the crotch, and excellent fit and leakage prevention performance, and a method for producing the same.

  In general, conventional disposable diapers have a large crotch in the worn state and often have a strange appearance. When such a diaper is worn, it is difficult to move the foot, and the position of the diaper is likely to shift due to the movement of the wearer. In addition, if the crotch part is loose, it becomes difficult to wear a trousers or other outerwear on the diaper, and even if the outerwear can be worn somehow, the appearance is not good.

  It is known that it is effective to reduce the width of the absorbent body in the crotch part in order to eliminate the looseness in the crotch part and improve the fit in the crotch part. However, an absorber with a narrow width of the crotch has a low absorption power because the width of the absorber at the crotch is substantially narrow, and does not absorb excrement such as urine in a portion where the absorber does not exist. Therefore, leakage at the crotch part is likely to occur.

  Therefore, as a diaper that achieves both fit and leakage prevention at the crotch, the absorbent body is divided into the left, center, and right of the crotch in the diaper width direction. The thing which made each absorber stand up is proposed. For example, the first absorbent body that is positioned flat in the center along the longitudinal direction of the diaper, and the first absorbent body is disposed on both sides of the first absorbent body with a gap at least partially. There has been proposed a disposable diaper comprising a second absorbent body, an elastic body is attached to the upper part of the second absorbent body, and a standing tendency and gathers are imparted to the second absorbent body ( Patent Document 1).

  However, a conventional disposable diaper having an absorbent body divided into three at the crotch portion as disclosed in Patent Document 1, the left and right absorbent bodies are separated from the boundary with the central absorbent body (pulp and When standing up toward the wearer's skin starting from the part where no absorbent material such as a water-absorbing polymer is present), the sheet base material such as the surface sheet is lifted at the starting point, or the positions of the absorbent bodies on both the left and right sides There was a problem of slipping. Such lift of the sheet base material and the position shift of the absorbent body at the part that becomes the starting point of the absorbent body obstructs the standing of the absorbent body, making the bending line to be formed at the starting point unclear, Stable formation of the three-dimensional structure (concave pocket structure formed by the central absorbent body and the left and right absorbent bodies standing upright) to be formed in the crotch part is inhibited, resulting in a decrease in fit and leakage resistance.

Japanese Patent No. 2884355

  Accordingly, an object of the present invention is to provide a disposable diaper having a clean appearance when worn, good solid formation by standing up an absorbent body in the crotch, and excellent fit and leakage prevention, and a method for producing the same. There is.

  The present invention relates to an absorbent main body having a liquid-retaining absorbent core and a liquid-permeable surface sheet covering the entire skin contact surface side of the absorbent core, and a non-skin contact surface of the absorbent main body In the disposable diaper having an exterior body positioned on the side, the absorbent main body is configured such that both side portions of the crotch part stand up, and the absorbent core covers the absorbent body and the entire absorbent body. The absorbent body includes a central absorbent body and a pair of side absorbent bodies provided symmetrically on both sides in the longitudinal direction of the central absorbent body. A linear portion formed between the body and the pair of side absorbers, each of which is at least at the crotch portion and substantially parallel to the longitudinal direction of the central absorbent body (A) the top sheet and the coating in the linear portion A part or the entire area between the covering sheet and (B) the covering sheet located on the skin contact surface side of the absorbent body in the linear portion and the non-skin contact surface side of the absorbent body The object is achieved by providing a disposable diaper in which a part or the entire area between the covering sheet and the covering sheet is bonded and fixed by an adhesive.

  The present invention also relates to an absorbent main body having a liquid-retaining absorbent core and a liquid-permeable surface sheet covering the absorbent core, and an exterior body positioned on the non-skin contact surface side of the absorbent main body. The absorbent main body is configured such that both sides of the lower crotch stand upright, and the absorbent core is composed of an absorbent body and a water-permeable covering sheet that covers the entire absorbent body. The absorber includes a central absorber and a pair of side absorbers provided symmetrically on both sides in the longitudinal direction of the central absorber, the central absorber and the pair of side It has a separation part between each absorber, and this separation part is a manufacturing method of a disposable diaper which has a linear part formed in parallel with the longitudinal direction of this central absorber. Then, an adhesive is applied to the covering sheet, and the covering is performed with the adhesive application surface facing inward. A first step of coating the absorbent body separately manufactured with a sheet, pressing a portion corresponding to the cut-off portion of the absorbent body coated with the covering sheet, and forming an absorbent core precursor; A second step of applying an adhesive to the surface sheet; and coating the absorbent core precursor with the surface sheet with the adhesive-coated surface inside, and the absorbent core precursor coated with the surface sheet. A third step of pressing a portion corresponding to the separation portion, and in the first step, at least a part or the entire portion of the covering sheet corresponding to the linear portion and the side absorber. A method for manufacturing a disposable diaper, wherein an adhesive is applied to a part or the whole of a portion to be applied, and in the second step, an adhesive is applied to at least a part or the whole of the part corresponding to the linear portion of the topsheet. To achieve the above purpose by providing It is intended.

  The disposable diaper of the present invention adopts a characteristic form of the absorbent core, and since the components at the specific part are joined and fixed with an adhesive, the crotch does not bump in the worn state, and the appearance when worn is It is neat, and the standing property of the absorbent body in the crotch part is good, the positional displacement of the side absorbent body hardly occurs, the concave pocket structure is stably formed, and the fit property and the leakproof property are excellent.

  Moreover, according to the manufacturing method of the disposable diaper of this invention, the disposable diaper which has the above-mentioned effect can be manufactured efficiently. In particular, by applying an adhesive to a part or all of the part corresponding to the side absorbent body of the covering sheet, the “absorber of the side absorbent body” that is a concern during diaper production (the position of the side absorbent body is not constant, Fluctuations) can be effectively suppressed, and the absorber can be accurately arranged at a predetermined position.

Hereinafter, first, the disposable diaper of this invention is demonstrated, referring drawings based on the preferable one Embodiment.
The disposable diaper 1 of the present embodiment (hereinafter referred to as diaper 1) is a so-called pants-type diaper. As shown in FIGS. 1 and 2, the liquid-retaining absorbent core 2 and the skin of the absorbent core 2 are used. An absorptive main body 4 having a liquid-permeable surface sheet 3 covering the entire area on the abutting surface side, and an exterior body 10 positioned on the non-skin abutting surface side of the absorptive main body 4 are provided. The diaper 1 is divided into an abdominal side A disposed on the wearer's abdomen, a back side B disposed on the back of the wearer, and a crotch C positioned therebetween. The ventral portion A, the back portion B, and the crotch portion C are in a longitudinal direction (FIG. 2) in a diaper that is expanded and stretched (a state in which the elastic members of the respective portions are stretched and expanded in a flat shape, as shown in FIG. 2). In the vertical direction) is divided into three regions so as to be divided into approximately three equal parts.

In addition, in this specification, the "skin contact surface side" is the side (surface) that is disposed on the skin side of the wearer when worn out of both sides (surfaces) of each member such as the absorbent core and the absorbent main body. ). The “non-skin contact surface side” is a side (surface) that is disposed on the opposite side of the skin side of the wearer when worn, on both sides (surfaces) of each member.
The “longitudinal direction” is a direction parallel to the long side of each member. Hereinafter, the phrase “width direction” may be used, which is a direction orthogonal to the longitudinal direction.

The absorptive main body 4 has a vertically long rectangular shape, and a known joint such as a hot-melt adhesive is used so that its longitudinal direction coincides with the longitudinal direction of the diaper and extends from the abdominal side A to the back side B. It is joined to the central portion in the width direction of the exterior body 10 by means. The exterior body 10 has both side edge portions of the portion located on the ventral side portion A and both side edge portions of the portion located on the back side portion B by known joining means such as heat seal, high frequency seal, and ultrasonic seal. They are joined to each other, thereby forming a pair of side seal portions. Moreover, the waist opening W and a pair of leg opening parts L and L are formed in the diaper 1 by the joining.
The above-mentioned structure of the diaper 1 of this embodiment is the same as that of a conventionally well-known diaper.

  In the diaper 1 of the present embodiment, as shown in FIG. 2, elastic members 11, 11 for raising side portions of the absorbent main body 4 are provided on both sides in the longitudinal direction of the absorbent main body 4. The main body 4 is arranged in an extended state over the entire length. As a result, the absorbent main body 4 is configured such that both side portions 40, 40 in the crotch portion C stand up as shown in FIG.

  Further, on both sides in the longitudinal direction of the absorbent main body 4, the leak-proof cuff forming sheet 12 and the leak-proof cuff forming sheet 12 are fixed in an extended state over the entire length of the absorbent main body 4. A leak-proof cuff 14 is formed by the elastic member 13.

  Below, the absorptive core 2 in the diaper 1 of this embodiment is explained in full detail. As shown in FIGS. 2 to 4, the absorbent core 2 has a vertically long rectangular shape in plan view as a whole, and an absorbent body 5 and a water-permeable covering sheet 6 that covers the entire absorbent body 5. It has.

  As shown in FIGS. 2 and 3, the absorbent body 5 includes an hourglass-shaped central absorbent body 50 and a pair of side absorbent bodies 51, 51 provided symmetrically on both sides in the longitudinal direction of the central absorbent body 50. And between the central absorbent body 50 and the pair of side absorbent bodies 51, 51, there are separation parts 52, 52 which are space portions where no absorbent body exists. The pair of side absorbers 51 and 51 are connected to each other at the front portion F of the central absorber 50. The separation parts 52, 52 are provided on both sides of the central part M of the central absorbent body 50 and open to both side parts of the rear part R. In addition, the front part F, the center part M, and the rear part R are each area | region when it divides into 3 area | region so that the full length of the longitudinal direction may be divided into about 3 equally in the absorber 5 of the state shown in FIG. . In the present embodiment, as shown in FIGS. 1 and 2, the absorbent body 5 is configured such that the side absorbent bodies 51, 51 are arranged in the crotch part C and the front part F of the central absorbent body 50 is located in the ventral part A. As it does, it is arranged in the diaper 1.

  Each of the separation parts 52 and 52 has a linear part 53 (shaded part in FIG. 3) formed at least in the crotch part C in parallel with the longitudinal direction of the central absorbent body 50. The linear part 53 is a part which becomes a starting point when the side absorbent body 51 stands up (the side part 40 of the absorbent main body 4 stands up).

  When the absorbent body 5 is configured as described above, the crotch part does not bump when the diaper is worn, and the appearance of the diaper can be refreshed, and good fit and leakage prevention at the crotch part can be achieved. Can be obtained.

  The length L1 of the linear portion 53 is preferably 120 to 300 mm, more preferably 160 to 230 mm, from the viewpoint of achieving a shape that can effectively achieve the fit when worn. The maximum width W1 of the linear portion 53 is preferably 5 to 20 mm, and more preferably 10 to 15 mm, from the standpoint of the standing property and moldability of the side absorber.

  The length L2 of the separation part 52 is preferably 140 to 320 mm, more preferably 180 to 250 mm. The length L2 of the separation portion 52 is such that the tip end portion 52a of the separation portion 52 (the central portion in the width direction of the end portion on the front edge 5f side of the absorber 5 in the separation portion 52) and the open end portion 52b (cutting portion 52b). This is the distance between the separation portion 52 and the end portion on the rear edge 5r side of the absorber 5 in the width direction.

  The cut-off portion 52 is located at a front end portion 52a of the absorber 5 from the front edge 5f, preferably 20 to 30% of the entire length of the absorber 5, more preferably 22 to 27%, and the open portion 52a. It is preferable that the end portion 52b is located at a portion of the entire length of the absorber 5 from the rear edge 5r of the absorber 5, preferably 12 to 24%, more preferably 16 to 20%.

  The central part M of the central absorbent body 50 is formed narrower than the front part F and the rear part R. The width W2 of the central portion M is preferably 30 to 90 mm, more preferably 40 to 60 mm. The central part M of the central absorbent body 50 is an area arranged in the crotch part C of the diaper 1. If the width of the central part M is less than 30 mm, there is a risk of leakage particularly in the crotch part. Then, there exists a possibility of the deterioration of the external appearance at the time of wear, the fall of the fitting property in a crotch part, etc. The width W3 of the portion (the front portion F and the rear portion R) excluding the central portion M of the central absorbent body 50 is 90 to 200 mm, particularly 100 to 150 mm, to ensure absorption performance on the ventral side and the back side. Is preferable. The total length L3 in the longitudinal direction of the central absorbent body 50 is preferably 300 to 500 mm, more preferably 330 to 450 mm.

  The thickness of the absorbent body 5 (the central absorbent body 50 and the side absorbent bodies 51 and 51) is preferably 2 to 20 mm, more preferably 5 to 15 mm, from the viewpoints of softness and fit.

The said covering sheet 6 is a sheet-like thing formed from tissue paper, a nonwoven fabric, etc., and has a magnitude | size which can coat | cover the said absorber 5 whole. The basis weight of the covering sheet 6 is preferably 10 to 20 g / m ² .

  Below, the joining fixation of each member in the inside of the said absorptive main body 4 and the exterior is explained in full detail. In the following, the covering sheet 6 that covers the entire absorbent body 5 is referred to as a “covering sheet 6 a” that is located on the skin contact surface side of the absorbent body 5. What is located on the non-skin contact surface side may be referred to as “cover sheet 6b”.

  In the diaper 1 of the present embodiment, as shown in FIG. 4, mainly the sheet base material such as the top sheet 3 and the covering sheet 6 is prevented from being lifted and the side absorbers 51 and 51 are stably disposed (preventing misalignment). In view of the above, (A) a part or the entire area between the topsheet 3 and the covering sheet 6 (covering sheet 6a) in the linear portion 53, and (B) the covering sheet 6a in the linear portion 53. And a part or the entire area between the cover sheet 6b and the covering sheet 6b are each bonded and fixed by an adhesive.

As described in (A) above, the side absorber is erected at the time of wearing and using the diaper by bonding and fixing between the surface sheet and the covering sheet at the separation portion (linear portion) where the absorber does not exist. Sometimes, the surface sheet does not float up and a clear bend line is formed, so that good standing of the absorber can be obtained and a stereoscopic effect can be produced.
In addition, as described in (B) above, by joining and fixing the covering sheets at the separation part (straight line part), positional displacement of the side absorbent body is effectively prevented, and twisting occurs when the diaper is worn and used. Even if it occurs, the concave pocket structure is difficult to break, and good fit and leakproofness can be stably obtained.
Therefore, the disposable diaper of the present invention comprising the above (A) and (B), coupled with the adoption of the above-mentioned characteristic form of the absorbent body, the crotch part does not hit the worn state, The appearance at the time of wearing is clean, the riser of the absorbent body at the crotch is good, the position shift of the side absorbent body is difficult to occur, the concave pocket structure is stably formed, and the fit and leakproofness are excellent Yes.

  In the diaper 1 of the present embodiment, the bonding and fixing between the sheets in (A) is performed by a bonding and fixing portion 7A formed by application of an adhesive. The joint fixing portion 7A is a part of the linear portion 53 between the top sheet 3 and the covering sheet 6a, more specifically, the side absorbent body between the sheets 3 and 6a in the linear portion 53. The straight portion 53 is formed over the entire length of the straight portion 53 at a portion closer to 51 (outward in the diaper width direction). The width of the joint fixing portion 7A is preferably 5 to 30 mm, more preferably 8 to 15 mm. The shape of the joint fixing portion 7A is not particularly limited, and can be, for example, a bead shape, a spiral shape, an omega shape, or a wave shape.

  Further, the bonding and fixing between the sheets in (B) is performed by a bonding and fixing portion 7B formed by application of an adhesive. The joint fixing portion 7B is a part of the linear portion 53 between the covering sheet 6a and the covering sheet 6b, more specifically, the side absorbent body between the sheets 6a and 6b in the linear portion 53. The straight portion 53 is formed over the entire length of the straight portion 53 at a portion closer to 51 (outward in the diaper width direction). The width and shape of the joint fixing part 7B can be the same as those of the joint fixing part 7A.

  In the diaper 1 of the present embodiment, in addition to the bonding and fixing of (A) and (B) described above, (C) the skin contact surface side of the side absorbent body 51 and the skin contact surface side are further covered. Part or whole area between the covering sheet 6a and (D) part or whole area between the covering sheet 6a covering the skin contact surface side of the side absorbent body 51 and the surface sheet 3, (E) central absorption Part or the entire region between the skin contact surface side of the body 50 and the cover sheet 6a covering the skin contact surface side, and (F) the cover sheet 6a covering the skin contact surface side of the central absorbent body 50 A part or the entire area between the surface sheet 3 and the surface sheet 3 is bonded and fixed by an adhesive.

  More specifically, in the present embodiment, (C) the side absorbent body 51 is formed with a joint fixing portion 7C formed at a part between the skin contact surface side of the side absorbent body 51 and the covering sheet 6a. 7D is formed in a part between the covering sheet 6a and the surface sheet 3 that cover both the skin contact surface side of the skin, and (E) the skin contact surface side of the central absorbent body 50 and the covering sheet 6a The joint fixing part 7E is formed in a part between the two, and (F) the joint fixing part 7F is partly provided between the covering sheet 6a and the surface sheet 3 that cover the skin contact surface side of the central absorbent body 50 together. Is formed. These joint fixing portions 7C, 7D, 7E, and 7F are formed over the entire length of the absorbent body 5, respectively. The width and shape of these four types of joint fixing parts can be the same as those of the joint fixing part 7A. In addition, the number and formation position of these four types of joint fixing portions can be arbitrarily set.

  In this way, by connecting and fixing the constituent members (absorber, covering sheet, surface sheet) on the skin contact surface side of each of the central absorbent body and the side absorbent body, Since the lifting of the entire covering sheet is effectively prevented, wrinkles are less likely to occur, and the appearance of the diaper is further improved. Note that the bonding and fixing of (C) is effective not only for preventing the entire sheet from being lifted, but also for preventing the side absorber from flaking during diaper manufacture. Therefore, the position shift of the absorber can be more effectively prevented by adopting the bonding and fixing of (C).

  Further, as in the present embodiment, even if not adopting all of the joining and fixing of (C) to (F), by adopting at least one of these four joining and fixing, A certain effect is obtained for preventing the entire covering sheet from being lifted. However, a more effective form is a form adopting the joining and fixing of (C) and (D) (a form in which the constituent members on the skin contact surface side of the side absorbent body are joined and fixed), or ( E) and the configuration (F) that employs the joint fixing (a configuration in which the constituent members on the skin contact surface side of the central absorbent body are joined and fixed), and the most effective configuration is all four joint fixings. It is this embodiment which adopted.

  As the adhesive used for bonding and fixing in the above (A) to (F), a hot melt adhesive is preferable. Examples of the hot melt adhesive include SIS (styrene-isoprene-styrene block polymer), SIBS (styrene-isoprene-butadiene-styrene block copolymer), SEBS (styrene-ethylene-butylene-styrene block polymer), SEPS (styrene- Styrene elastomers such as ethylene-propylene-styrene block polymers); ethylene / vinyl acetate copolymers; elastomers such as polyesters, acrylics and polyolefins; rubbers such as polyisobutylene, butyl rubber, polyisoprene and natural rubber Preferably used.

The coating amount of the adhesive in (A) to (F) is preferably 3 to 15 g / m ² , more preferably 5 to 10 g, from the viewpoint of the balance between adhesive strength and air permeability and flexibility of the sheet. / M ² .

  Moreover, in the diaper 1 of this embodiment, as shown in FIG. 4, the said surface sheet 3 is a pair of extension part each extended in the width direction outward from the both-sides edge of the longitudinal direction of the said absorptive core 2. As shown in FIG. 31, 31. The pair of extending portions 31, 31 are respectively wound down to the non-skin contact surface side of the absorbent core 2, and the side edges of the absorbent core 2 and the non-skin contact of the side absorbent body 51 The entire surface side is covered. In the present embodiment, the pair of extending portions 31, 31 further cover the side portions in the longitudinal direction of the central absorbent body 50.

  Between the covering sheet 6b (the covering sheet 6 positioned on the non-skin contact surface side of the absorbent body 5) and the extending portion 31, at least a position corresponding to the side absorbent body 51 (below the side absorbent body 51). ) And bonded and fixed by an adhesive, and a bonding and fixing portion 7G is formed at the position. With such a configuration, the surface sheet 3 is more effectively prevented from being lifted. However, even without the joint fixing portion 7G, the above-described joint fixing portions including the joint fixing portions 7A and 7B can sufficiently prevent the sheet from rising.

  Moreover, in the diaper 1 of this embodiment, the area | region including the part extended in the diaper width direction inner side from this edge part in the edge part of the said extension part 31, and the said leak-proof cuff formation sheet 12, and this area | region The cover sheet 6b corresponding to is also integrally bonded and fixed by an adhesive, and a bonding fixing portion 7H is formed. The joint fixing portion 7H is effective for stable arrangement of the absorbent core 2, the top sheet 3, and the leak-proof cuff 14.

  The widths of the joint fixing portions 7G and 7H are preferably 5 to 30 mm, more preferably 8 to 15 mm, respectively. The shapes of the joint fixing portions 7G and 7H can be various shapes as in the case of the joint fixing portion 7A.

  Moreover, in the diaper 1 of this embodiment, the leak-proof cuff forming sheet 12 which is one of the constituent members of the leak-proof cuff 14 is bonded and fixed to the extending portion 31 as shown in FIG. The joint fixing part 7I is formed. The joint fixing portion 7I is located at a position corresponding to the linear portion 53 (below the linear portion 53) in a state where the both side portions 40, 40 of the absorbent main body 4 are not raised (state shown in FIG. 2). It is in. By joining and fixing the leak-proof cuff 14 at such a position, the standing property of the leak-proof cuff 14 is further improved. In the present embodiment, the joint fixing portion 7I is formed at a position corresponding to the linear portion 53 and closer to the central absorber 50. Thus, by forming the joining and fixing part 7I between the sheet 12 for forming the leak-proof cuff and the extending part 31 of the top sheet 3 directly below the linear part 53 and inward in the width direction of the diaper 1, The influence of the shape of the straight portion 53 (the length in the width direction, the meandering degree, etc.) on the standing property of the leak-proof cuff 14 can be effectively suppressed, and the standing property of the leak-proof cuff 14 is further improved. Become.

  The joint fixing portion 7I is formed by using a known joining means such as a heat seal, a high frequency seal, an ultrasonic seal, a hot melt adhesive, or the like, and the extension portion 31 of the sheet 12 for forming a leak-proof cuff and the top sheet 3. And can be formed by joining. The shape of the joint fixing portion 7I is not limited to a linear shape, and can be various shapes.

  Moreover, in the diaper 1 of this embodiment, as shown in FIG. 4, the longitudinal center part of the liquid-impermeable back sheet 8 is joined to the skin contact surface side of the exterior body 10, and the back sheet On the skin contact surface side of 8, the leak-proof cuff forming sheet 12 and the absorbent main body 4 are sequentially joined. With such a configuration, both longitudinal ends of the back sheet 8 are both longitudinal ends of the joint portion between the exterior body 10 and the back sheet 8 (boundary portions between the longitudinal center and both longitudinal sections of the back sheet 8). As a starting point, it comes to stand up toward the wearer together with the leak-proof cuff forming sheet 12, and the leak-proof property of the absorbent body is further enhanced. For joining these members, joining means such as a hot melt adhesive can be used.

  As shown in FIG. 4, the absorbent main body 4 has the surface of the non-skin contact surface side in the width direction, and the absorbent core 2 extends over the entire longitudinal direction of the absorbent main body 4. The non-covered portion 41 is not covered with the sheet 3, and the leak-proof cuff forming sheet 12 is not disposed on a portion corresponding to the non-covered portion 41. For this reason, this non-coating part 41 and the said back surface sheet 8 are in the state which mutually opposed without joining over the whole longitudinal direction of the absorptive main body 4. FIG. With such a configuration, it is possible to further improve the absorption performance from the non-skin contact surface side of the absorbent main body 4. Further, when the back sheet 8 is printed with various patterns or a manufacturer's brand mark or the like, the back sheet 8 is disposed adjacent to the exterior body 10, so that the outside of the printed pattern There is also a merit that visibility from is increased.

  Further, in the diaper 1 of the present embodiment, the elastic members 11 and 11 for raising the side portions of the absorbent main body 4 are respectively arranged along the side end surfaces in the longitudinal direction of the absorbent core 2. In addition, the cover sheet 6 and the top sheet 3 (the extending portion 31) are bonded and fixed by a bonding means such as an adhesive or heat seal. The location of the elastic members 11, 11 is not limited to this, and can be disposed inside the absorbent core 2 (between the covering sheet 6 and the absorbent body 5). It can also arrange | position to the side edge vicinity in the skin contact surface side of the absorber 5, etc.

  The exterior body 10 will be described. As shown in FIGS. 2 and 4, the exterior body 10 includes two sheets 10 a and 10 b and elastic members of respective parts fixed between the two sheets. . Between the two sheets 10a and 10b, a waist elastic member 71 that forms a waist gather at the peripheral edge of the waist opening W, and a leg elastic member that forms a leg gather at the peripheral edge of the leg opening L 81, and a waistline elastic member that forms a waistline gather in a state where the waistline part D is divided into a waistline part D that is a region from a position 20 mm below the peripheral edge of the waist opening W to an upper end of the leg opening L 91 are joined and fixed by joining means such as a hot melt adhesive in the stretched state.

  Both the sheet 10a and the sheet 10b are made of a breathable nonwoven fabric. Of these two sheets, the sheet 10a located on the non-skin contact surface side is longer than the front and rear edges (the both edges in the longitudinal direction of the diaper) of the sheet 10b located on the skin contact surface side in the longitudinal direction. Each of the portions has an extended portion, and each of the portions covers the front and rear ends (both ends in the longitudinal direction of the diaper) of the absorbent main body 4 after the absorbent main body 4 is disposed on the sheet 10b. It is folded and bonded to the absorbent main body 4 side.

  The leak-proof cuff 14 will be described. The leak-proof cuff 14 extends over the entire length of the absorbent main body 4 on both sides in the longitudinal direction of the absorbent main body 4 as shown in FIGS. The leak-proof cuff forming sheet 12 and the elastic member 13 (13a to 13c) fixed to the leak-proof cuff forming sheet 12 in an expanded state. In the diaper 1 of the present embodiment, a sheet-like water-repellent sheet having a predetermined width is folded as a sheet 12 for forming the leak-proof cuff 12 along a fold line along the longitudinal direction thereof, and the opposing layers are hot. A sheet having a two-layer structure joined by a melt adhesive or a partial heat or ultrasonic seal is used. The elastic members 13a to 13c are fixed in an expanded state between the layers of the two-layer structure sheet.

  The leak-proof cuff forming sheet 12 covers the absorbent main body 4 from the skin contact surface side to the non-skin contact surface side in the abdominal side portion A and the back side portion B, respectively. At both ends in the longitudinal direction of the adhesive main body 4, it is bonded to the skin contact surface side of the absorbent main body 4 by a known bonding means such as a heat seal, a high frequency seal, an ultrasonic seal, or a hot melt adhesive. .

  As shown in FIG. 4, the leak-proof cuff 14 can stand at least at the crotch portion C. The elastic member 13a is disposed along the free end at the free end of the leak-proof cuff 14, and the elastic member 13b is disposed in parallel with the free end near the elastic member 13a. Yes. By arranging the plurality of elastic members 13a and 13b in this way, the tip of the standing leak-proof cuff 14 comes into surface contact with the wearer's skin, and the adhesion to the body of the diaper is increased. As a result, leakage resistance is improved and the diaper can be brought into gentle contact with the skin. The elastic member 13c is disposed between the free end and the fixed end of the leak-proof cuff 14 (position overlapping the both ends of the absorber 5), and the leak-proof cuff 14 starts from the position where the elastic member 13c is disposed. The diaper is bent inward in the width direction.

  According to the diaper 1 of the present embodiment, as described above, since the absorbent core 2 having a characteristic form is used and the constituent members in the specific part are joined and fixed with an adhesive, the crotch portion is worn when worn. The diaper's appearance is clean, with no bumps, good standing of the absorbent body in the crotch area, the side absorbent body is less likely to be misaligned, the concave pocket structure is stably formed, fit and leakproof Is excellent. That is, in such a configuration, when the both side portions 40, 40 of the absorbent main body 4 stand up from the linear portion 53 as shown in FIG. Since the sheet 3 and the covering sheet 6 do not float toward the skin contact surface side, the both side portions 40 and 40 rise greatly toward the wearer, and a clear bend line is formed at the starting point. The side absorbent body 51 is not displaced in each of the portions 40 and 40, and the concave pocket structure formed by the central absorbent body 50 and the left and right side absorbent bodies 51 and 51 is stably formed. This pocket structure makes it difficult for excrement to leak out, and even when a large amount of urine is excreted in a short period of time, or when watery stool or loose stool that is difficult to absorb is excreted, the excrement leaks out. hard. Even if the excrement leaks from the pocket structure, the leak-proof cuff 14 can reliably prevent the excrement from leaking to the outside.

As a material which comprises each part of the diaper 1 of this embodiment, what is normally used in the said technical field can be especially used without a restriction | limiting.
For example, as the surface sheet 3, a hydrophilic and liquid-permeable nonwoven fabric or an apertured film can be used. As the back sheet 8, a liquid-impermeable material or a water-repellent material can be used. As the liquid-impermeable material, a resin film, a laminate material of a resin film and a nonwoven fabric, or the like can be used. As the water-repellent material, a water-repellent nonwoven fabric or the like can be used. As the water-repellent nonwoven fabric, a nonwoven fabric described later as a leak-proof cuff forming sheet can be used.

  As the absorbent body 4, a fiber aggregate made of pulp fibers or the like, or a fiber aggregate and a water absorbent polymer (mixed product of water absorbent polymer and fiber material) can be used. Examples of water-absorbing polymers include sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, cross-linked sodium polyacrylate, (starch-acrylic acid) graft copolymer, and (isobutylene-maleic anhydride) copolymer. Examples thereof include a polymer and a saponified product thereof, and polyaspartic acid. As fibers constituting the absorbent body 4, for example, hydrophilic fibers such as pulp fibers, rayon fibers, cotton fibers, and cellulose acetate, polyolefin fibers such as polyethylene and polypropylene, and condensation fibers such as polyester and polyamide are used. it can. The water-absorbing polymer and the fiber can be used alone or in combination of two or more.

As the leak-proof cuff forming sheet 12, a composite nonwoven fabric having a multilayer structure composed of spunbond, meltblown, spunbond, etc., a spunbond nonwoven fabric, a heat bond nonwoven fabric, an air-through nonwoven fabric, and the like can be used. from the viewpoint of nonwoven fabric is preferably a multilayer structure composed of spunbond and meltblown basis weight about 12 g / m ² is preferred.

  As the form of the elastic members 13a to 13c for forming the leak-proof cuff, a thread-like member (thread rubber or the like), a belt-like member having a predetermined width (flat rubber or the like), etc. are preferable, and a thread-like member is particularly preferable. Examples of the material of the elastic members 13a to 13c include natural rubber, synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, EVA, stretchable polyolefin, urethane, and the like. Moreover, as a form of the elastic members 11, 71, 81, 91, a thread-like member, a belt-like member having a predetermined width, a thin-film member, or the like can be used. As those materials, those described as the materials of the elastic members 13a to 13c can be used.

  FIG. 5 is a view corresponding to FIG. 4 for another embodiment of the disposable diaper of the present invention. The embodiment shown in FIG. 5 is configured in the same manner as the above-described embodiment except that the bonding and fixing forms of (B) and (C) are different. In the embodiment shown in FIG. 5, the cover sheet 6 (6a, 6b) is bonded and fixed in (B), and the skin contact surface side of the side absorbent body 51 and the cover sheet 6a in (C). The joint is fixed continuously by the common joint fixing portion 7BC. That is, the joint fixing part of (B) and a part of the joint fixing part of (C) (the joint fixing part formed on the skin contact surface side in the side part of the side absorbent body close to the central absorbent body) However, they are continuously and integrally formed. As will be described later, the common joint fixing portion 7BC has a linear portion 53 at a position corresponding to the side edge 51a on the central absorbent body 50 side of the side absorbent body 51 in the covering sheet 6a (substantially above the side edge 51a). It is formed by applying an adhesive with a predetermined width over the entire length. By the common joint fixing portion 7BC, the portion 6bs corresponding to the side portion 51 of the linear portion 53 of the covering sheet 6b and the side of the skin absorber surface side of the side absorber 51 near the center absorber 50 (in the diaper width direction) The side portion 51s of the other side and the portion 6bs of the covering sheet 6a and the portion corresponding to the side portion 51s are integrally bonded and fixed. The width of the common joint fixing part 7BC is preferably 5 to 30 mm, more preferably 8 to 15 mm. The common joint fixing part 7BC can have various shapes, similar to the joint fixing part 7A.

Next, the manufacturing method of the disposable diaper of this invention is demonstrated, referring drawings based on the preferable one Embodiment.
The manufacturing method of the present embodiment is the manufacturing method of the diaper shown in FIG. 5, that is, the absorbent main body 4 having the liquid-retaining absorbent core 2 and the liquid-permeable surface sheet 3 covering the absorbent core 2. In the disposable diaper comprising the outer body 10 positioned on the non-skin contact surface side of the absorbent main body 4, the absorbent main body 4 is configured such that both side portions 40, 40 in the crotch part C stand up. The absorbent core 2 includes an absorbent body 5 and a water-permeable covering sheet 6 that covers the entire absorbent body 5. The absorbent body 5 includes a central absorbent body 50 and the central absorbent body 50. A pair of side absorbers 51, 51 provided symmetrically on both sides in the longitudinal direction of the first and second side absorbers 51, 51, and a separation portion 52 between the central absorber 50 and the pair of side absorbers 51, 51, respectively. The separating portion 52 is formed in parallel with the longitudinal direction of the central absorbent body 50. A method for producing a disposable diaper having a straight portion 53.

  In the manufacturing method of the present embodiment, as shown in FIG. 6, first, a long covering sheet 6 ′ is traveled, and an adhesive is applied to the traveling covering sheet 6 ′ by a coating device 20, and this adhesive The absorbent body 5 separately manufactured according to a conventional method is placed on the coated surface, and the longitudinal direction (running direction) both ends of the covering sheet 6 ′ are on the absorbent body 5 with the adhesive coated surface inside. The absorbent body 5 is covered with the covering sheet 6 ′ so as to overlap with each other, and the portions corresponding to the separation parts 52, 52 of the absorbent body 5 covered with the covering sheet 6 ′ are pressed to absorb A core precursor 2 ′ is used (first step).

  In the present embodiment, in the first step, after the absorbent body 5 is coated with the covering sheet 6 ′, before the predetermined portion of the absorbent body 5 is pressed, the absorption covered with the covering sheet 6 ′. The body 5 is inverted 180 °. Thus, the reason for adjusting the direction of the absorbent body 5 covered with the covering sheet 6 ′ in the first step is that the longitudinal direction of the covering sheet 6 ′ covering the absorbent body 5 is passed through the third step described later. (Running direction) Both ends (overlapping portions of the covering sheets) and the longitudinal direction (running direction) of the topsheet 3 ′ covering the absorbent body 5 (in the process, covering the absorbent core precursor 2 ′) This is because both end portions are positioned on the same side with respect to the absorber 5. Thus, in the state completed as a diaper by positioning the longitudinal direction both ends of each sheet | seat (a covering sheet and a surface sheet) which coat | covers an absorber on the same side with respect to this absorber, as shown in FIG. In addition, it is possible to position both end portions in the longitudinal direction of the covering sheet 6 (overlapping portions of the covering sheet) on the non-skin contact surface side, whereby the overlapping portion of the covering sheet is positioned on the skin contact surface side. It is possible to prevent a decrease in absorption performance that is a concern.

  In the adhesive application step in the first step, as shown in FIG. 7, at least one portion corresponding to the linear portion 53 of the covering sheet 6 ′ (the hatched portion from the upper right to the lower left in FIG. 7). The adhesive is applied to a part or the entire region and a part or the entire region corresponding to the side absorbers 51, 51 (the hatched portion from the upper left to the lower right in FIG. 7). The former is for bonding and fixing the covering sheets 6 (6a, 6b) in (B), and the latter is bonding and fixing between the side absorber 51 and the covering sheet 6a in (C). It is to do. In the first step, the part to which the adhesive is applied in the covering sheet 6 ′ is a part located on the skin contact surface side in a state completed as a diaper (part corresponding to the skin contact surface side of the cover sheet). It is.

  As described above, “applying the adhesive to a part or the whole of the portion corresponding to the side absorbent body of the covering sheet” causes the completed diaper to achieve the above-described effects (such as prevention of lifting of the entire sheet). In addition to being effective, it is also effective in preventing the side absorber from flaking during diaper manufacture. By adopting such an adhesive application form, unnecessary movement such as lifting of the side absorber, which is a concern during diaper manufacture, can be suppressed, and the displacement of the absorber can be prevented in advance. Can be efficiently manufactured. In particular, in the portion corresponding to the side portion (the portion indicated by 51 s in FIG. 5) closer to the central absorbent body (in the diaper width direction) of the side absorbent body in the portion corresponding to the skin contact surface side of the covering sheet, “Applying the adhesive” is very effective in preventing the side absorber from being struck.

  In the present embodiment, as shown in FIG. 5, in order to continue the bonding and fixing in (B) and (C) via one bonding fixing portion (common bonding fixing portion), the bonding in the first step is performed. In the agent application step, as shown in FIG. 7, the flow direction of the covering sheet 6 ′ at a position corresponding to the side edge 51 a on the central absorbent body 50 side of each of the pair of side absorbent bodies 51, 51 in the covering sheet 6 ′. The hot-melt adhesive is applied in a spiral shape over the entire length to form adhesive application portions 7BC ′ and 7BC ′. The application shape of the hot melt adhesive is not limited to the spiral shape, and can be the above-described various shapes. The application method is not particularly limited, and the coater method, spiral method (omega method, dulau wave method). Etc.), known methods such as a spray method and a curtain spray method can be used.

  Although not shown in FIG. 7, in the adhesive application step in the first step of this embodiment, in addition to the adhesive application portion 7BC ′, it corresponds to the skin contact surface side of the covering sheet 6 ′. The flow of the covering sheet 6 ′ to a part of the portion corresponding to the side absorbent body 51 and a part of the portion corresponding to the skin contact surface side of the covering sheet 6 ′ corresponding to the central absorbent body 50 respectively. A hot melt adhesive is applied spirally over the entire length in the direction to form an adhesive application portion. In the state completed as a diaper, the former corresponds to the joint fixing part 7C shown in FIG. 5, and the latter corresponds to the joint fixing part 7E shown in FIG. The application shape and application method of the adhesive here can be the same as those in the adhesive application part 7BC '.

  The pressing process in the first step is performed by using the roll pair including the pattern roll 21 and the receiving roll 22 and passing the absorbent body 5 covered with the covering sheet 6 ′ between the pair of rolls. . A pair of convex portions corresponding to the shape of the separation portions 52, 52 are formed on the peripheral surface of the pattern roll 21, and the separation portions 52, 52 passing between the pair of rolls are paired with the pair of projections. It can press with a convex part.

  On the other hand, in parallel with the first step, a step of applying an adhesive to the top sheet (second step) is performed. In this embodiment, before applying the adhesive, a pair of leak-proof cuffs are applied to the top sheet. The joint is fixed. Each of the pair of leak-proof cuffs includes a leak-proof cuff forming sheet and an elastic member fixed to the leak-proof cuff forming sheet in an extended state. That is, as shown in FIG. 6, a pair of long leakage-proof cuff forming sheets 12 ′ in which an elastic member 13 ′ is fixed in advance in accordance with the traveling direction of the long topsheet 3 ′. , 12 ′, and a pair of heat rolls 23, 24 in a state in which they are overlapped, respectively, on the both sides in the flow direction on one surface of the top sheet 3 ′, respectively. 'Joining. The joint fixing portions 7I ′ and 7I ′ between the leakage-proof cuff forming sheet 12 ′ and the surface sheet 3 ′ thus formed finally have the joint fixing portions 7I and 7I in the diaper 1 of the present embodiment described above. Become.

  As described above, after joining and fixing the leak-proof cuff forming sheets 12 'and 12' to the top sheet 3 ', before the adhesive is applied, the continuous elastic members 13' and 13 'are each elastic by a predetermined length. Cut so that expansion and contraction is expressed. The cutting of the elastic member can be performed by a pre-cut method using an apparatus (not shown) having the same configuration as that of the heat rolls 23 and 24 and cutting only the elastic member by the seal convex portion of the apparatus. Also, the heat rolls 23 and 24 can be used simultaneously with the sealing.

  In the adhesive application step in the second step, the adhesive is applied to the surface of the top sheet 3 ′ opposite to the joint fixing surface of the leak-proof cuff forming sheets 12 ′ and 12 ′ by the coating device 25. At this time, as shown in FIG. 8, the adhesive is at least a portion corresponding to the linear portions 53, 53 in the portion corresponding to the skin contact surface side of the topsheet 3 ′ (shaded portion in FIG. 8). An adhesive is applied to a part of or the entire area. This is for bonding and fixing between the top sheet 3 and the covering sheet 6 (covering sheet 6a) in (A).

  In the present embodiment, as shown in FIG. 8, a portion corresponding to the side of the side absorbent body 51 of the linear portion 53 of the surface sheet 3 ′ is arranged along the flow direction of the surface sheet 3 ′ and the surface. Hot melt adhesive is applied in a wave shape over the entire length of the sheet 3 ′ in the flow direction to form adhesive application portions 7A ′ and 7A ′. In the present embodiment, the hot melt adhesive is further applied in a wave-like manner over a predetermined length of the portion corresponding to the non-skin contact surface side of the topsheet 3 ′ over the entire length of the topsheet 3 ′ in the flow direction. The wavy adhesive application portions 7G ′, 7G ′ and 7H ′, 7H ′ are formed, respectively. That is, in this embodiment, the top sheet 3 ′ is wider than the absorbent core 2 ′, and the longitudinal direction of the absorbent core 2 ′ when the top sheet 3 ′ is superimposed on the absorbent core 2 ′. A pair of extending portions 31 ′ and 31 ′ that extend outward in the width direction from both side edges of the pair, and also in a part of the pair of extending portions 31 ′ and 31 ′ in the second step. A hot melt adhesive is applied to form adhesive application portions 7G ′, 7G ′ and 7H ′, 7H ′.

The adhesive application portions 7G ′ and 7G ′ are substantially directly below the side absorber 51 when the extending portion 31 ′ is wound down below the absorbent core 2 ′ in the next third step. Is formed at a portion located at the end, and finally, the portion between the covering sheet 6b (the covering sheet 6 located on the non-skin contact surface side of the absorbent body 5) and the extending portion 31 is joined at the portion. Fix it.
The adhesive application portions 7H ′ and 7H ′ finally bond and fix between the end portion of the extension portion 31 and the covering sheet 6b corresponding to the end portion.

  The application shape of the hot melt adhesive in the second step is not limited to a wave shape as shown in FIG. 7, and can be various shapes as in the first step, and the application method is not particularly limited. In addition to the adhesive application portions 7A ', 7G' and 7H ', an adhesive application portion can be formed on the top sheet 3' by applying an adhesive to any location. For example, although not shown in FIG. 8, in this embodiment, a part of the portion corresponding to the side absorbent body 51 in the portion corresponding to the skin contact surface side of the topsheet 3 ′ and the topsheet 3 ′. A hot melt adhesive is applied in a wave-like manner over part of the portion corresponding to the central absorbent body 50 in the portion corresponding to the skin contact surface side over the entire length in the flow direction of the topsheet 3 ′. Form. In the state completed as a diaper, the former corresponds to the joint fixing part 7D shown in FIG. 5, and the latter corresponds to the joint fixing part 7F shown in FIG.

  After completion of the first step and the second step, the absorbent core precursor 2 ′ is coated with the surface sheet 3 ′ with the adhesive-coated surface of the surface sheet 3 ′ inside, and the surface sheet 3 ′ is coated with the surface sheet 3 ′. The part corresponding to the said separation parts 52 and 52 of this absorbed core precursor 2 'is pressed (3rd process). Thereby, the elongate absorptive main body precursor 4 'is obtained. In addition, although illustration is abbreviate | omitted, in this embodiment, before coat | covering the absorptive core precursor 2 'with the surface sheet 3' in a 3rd process, it is for raising the side part of the said absorptive main body 4 in a predetermined location. The elastic members 11, 11 are introduced.

  In the pressing process in the third step, a pair of rolls including a pattern roll 26 and a receiving roll 27 is used, and the absorbent core precursor 2 ′ covered with the topsheet 3 ′ is passed between the pair of rolls. Is done. Like the pattern roll 21, a pair of convex portions corresponding to the shape of the separation portions 52, 52 are formed on the peripheral surface of the pattern roll 26, and the separation that passes between the pair of rolls is formed. The portions 52 and 52 can be pressed by the pair of convex portions.

  The long absorbent main body precursor 4 ′ is cut into a predetermined length by the cutter 28. In the present embodiment, after the third step, the top sheet 3 ′ of the absorbent main body precursor 4 ′ is overlapped before the long absorbent main body precursor 4 ′ is cut into a predetermined length. A liquid-impermeable long back sheet is overlapped on the opposite side to the side to be coated, and the leak-proof cuff forming sheets 12 ′ and 12 ′ and the back sheet are joined and fixed with an adhesive or the like. (Not shown).

  The absorbent main body precursor 4 ′ manufactured as described above and the exterior body 10 separately manufactured according to a conventional method are bonded and fixed by a known bonding means, and both side edges and the back of the ventral side A are back. The diaper 1 of this embodiment which is a pants-type disposable diaper is obtained by joining and fixing the both side edges of the side part B by a known joining means.

As mentioned above, although this invention was demonstrated, this invention is not restrict | limited to embodiment mentioned above, A various change is possible in the range which does not deviate from the meaning of this invention.
The form of the absorbent body according to the present invention is not limited to the above-described embodiment, and for example, the linear portion 53 only needs to be formed substantially parallel to the longitudinal direction of the central absorbent body 50. FIG. As shown in FIG. 5, an absorbent body in which the linear portion 53 is formed substantially parallel to the longitudinal direction of the central absorbent body 50 is also included in the absorbent body according to the present invention. In the absorbent body 5, the pair of side absorbent bodies 51, 51 may be completely separated from the central absorbent body 50 without being connected to the central absorbent body 50. A part or all of the body 50 may have a two-layer structure including an upper absorbent body and a lower absorbent body.

  Further, the common joint fixing portion 7BC corresponds to a side edge 51a on the central absorbent body 50 side of the side absorbent body 51 in the cover sheet 6b (a cover sheet positioned on the non-skin contact surface side of the absorbent body). It may be applied at a position (substantially directly below the side edge 51a).

  Moreover, in the manufacturing method of the present invention, as described above, at the time when the third step is performed, both ends in the longitudinal direction (running direction) of the covering sheet 6 ′ covering the absorbent body 5 (overlapping portions of the covering sheets), In the first step, the covering sheet 6 ′ was coated so that both end portions in the longitudinal direction (running direction) of the surface sheet 3 ′ covering the absorbent body 5 are located on the same side with respect to the absorbent body 5. The orientation of the absorbent body 5 is preferably adjusted, and in order to realize this, the absorbent body 5 covered with the covering sheet 6 ′ is inverted by 180 ° in the above embodiment, but instead of this, FIG. As shown, the traveling direction of the covering sheet 6 ′ until the absorbent body 5 is covered with the covering sheet 6 ′ in the first step is the traveling direction of the covering sheet 6 ′ in the second step and the third step. The method of making it reverse can also be taken.

  Moreover, although the diaper of this embodiment mentioned above was a pants-type disposable diaper, the disposable diaper of this invention may be what is called a deployment-type disposable diaper provided with the fastening tape for diaper fastening. .

It is a perspective view of the underpants type diaper as one embodiment of the disposable diaper of the present invention. FIG. 2 is a plan view illustrating a state in which the diaper illustrated in FIG. 1 is separated and expanded by a side seal portion, and a state in which an elastic member of each portion is expanded and expanded in a planar shape is partially broken. It is a top view of the absorber in the diaper shown in FIG. It is a cross-sectional view which shows typically the II cross section of FIG. 2 in a diaper use state. It is the FIG. 4 equivalent view about another embodiment of the disposable diaper of this invention. It is process schematic explanatory drawing of one Embodiment of the manufacturing method of this invention. It is explanatory drawing of a part (process of apply | coating an adhesive agent to a coating sheet) of the process shown in FIG. It is explanatory drawing of the other part (process of apply | coating an adhesive agent to a surface sheet) of the process shown in FIG. It is a top view of other embodiments of an absorber concerning the present invention. It is process outline explanatory drawing of a part (1st process) of other embodiment of the manufacturing method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Absorbent core 3 Top sheet 4 Absorbent main body 5 Absorber 6 Cover sheet 7A, 7B, 7C, 7BC, 7D, 7E, 7F, 7G, 7H, 7I Bonding fixing part 8 Back sheet 10 Exterior body 12 Prevention Leakage cuff forming sheet 14 Leakage prevention cuff 50 Central absorbent body 51 Side absorbent body 52 Separating part 53 Linear part

Claims (9)

An absorbent main body having a liquid-retaining absorbent core and a liquid-permeable surface sheet covering the entire skin contact surface side of the absorbent core, and located on the non-skin contact surface side of the absorbent main body In a disposable diaper comprising an exterior body,
The absorbent main body is configured such that both sides of the crotch stand upright,
The absorbent core includes an absorbent body and a water-permeable covering sheet that covers the entire absorbent body,
The absorber includes a central absorber and a pair of side absorbers provided symmetrically on both sides in the longitudinal direction of the central absorber, and between the central absorber and the pair of side absorbers. Each having a separation portion, the separation portion has a linear portion formed substantially parallel to the longitudinal direction of the central absorbent body at least at the crotch portion;
(A) A part or the whole area between the topsheet and the covering sheet in the linear portion, and (B) the covering sheet located on the skin contact surface side of the absorbent body in the linear portion, A disposable diaper in which a part or the whole region between the absorbent body and the covering sheet located on the non-skin contact surface side is bonded and fixed with an adhesive.   Furthermore, (C) The one part or the whole region between the skin contact surface side of the said side absorber and the said coating sheet which coat | covers this skin contact surface side is joined and fixed by the adhesive agent. Disposable diapers. The bonding and fixing in (B) and (C) are performed at the position corresponding to the side edge on the central absorbent body side of the side absorbent body in the covering sheet located on the skin contact surface side of the absorbent body. It is made continuously by the common joint fixing part formed by applying
A portion of the covering sheet that is located on the non-skin contact surface side of the absorbent body corresponding to the side absorbent body and the skin contact surface side of the side absorbent body. The side part close to the central absorbent body and the part of the covering sheet located on the skin contact surface side of the absorbent body and the part corresponding to the side part are integrally bonded and fixed. The disposable diaper according to 2.   Further, (D) a part or the entire region between the covering sheet and the top sheet that covers the skin contact surface side of the side absorbent body is bonded and fixed by an adhesive. Disposable diapers.   Furthermore, (E) a part or the whole area between the skin contact surface side of the central absorbent body and the covering sheet covering the skin contact surface side, and (F) the skin contact surface of the central absorbent body The disposable diaper according to any one of claims 1 to 4, wherein a part or the entire region between the covering sheet and the top sheet that covers the side is joined and fixed by an adhesive. The top sheet has a pair of extending portions extending outward in the width direction from both side edges in the longitudinal direction of the absorbent core, and the pair of extending portions are respectively on the non-skin contact surface side. It is wound down to cover the entire side edge of the absorbent core and the non-skin contact surface side of the side absorbent body,
On both sides in the longitudinal direction of the absorbent main body, a leak-proof cuff is formed by a leak-proof cuff forming sheet and an elastic member fixed in an expanded state to the leak-proof cuff forming sheet. The sheet for use is bonded and fixed to the extension part,
The joint fixing portion between the leak-proof cuff forming sheet and the extending portion is in a position corresponding to the linear portion in a state where the both side portions of the absorbent main body are not raised. The disposable diaper according to any one of the above. The central portion in the longitudinal direction of the liquid-impermeable back sheet is joined to the skin contact surface side of the exterior body, and the leak-proof cuff forming sheet and the absorbent main body are connected to the skin contact surface side of the back sheet. Are joined sequentially,
The absorbent main body has a non-covered portion in which the absorbent core is not covered with the extending portion at the center in the width direction on the non-skin contact surface side,
The disposable diaper according to claim 6, wherein the leak-proof cuff forming sheet is not disposed in a portion corresponding to the non-covering portion. Disposable diaper comprising a liquid-retaining absorbent core, an absorbent main body having a liquid-permeable surface sheet covering the absorbent core, and an exterior body positioned on the non-skin contact surface side of the absorbent main body In the absorbent main body, both sides of the crotch part are erected, and the absorbent core includes an absorbent body and a water-permeable covering sheet that covers the entire absorbent body, The absorber includes a central absorber and a pair of side absorbers provided symmetrically on both sides in the longitudinal direction of the central absorber, and between the central absorber and the pair of side absorbers. Each has a separation part, the separation part is a method of manufacturing a disposable diaper having a linear part formed substantially parallel to the longitudinal direction of the central absorbent body,
Applying an adhesive to the cover sheet, covering the absorbent body separately manufactured with the cover sheet with the adhesive-coated surface inside, and corresponding to the cut-off portion of the absorbent body covered with the cover sheet A first step of pressing the portion to be made into an absorbent core precursor, a second step of applying an adhesive to the topsheet, and the absorbent core precursor with the topsheet with the adhesive-coated surface inside And a third step of pressing a portion corresponding to the cut-off portion of the absorbent core precursor covered with the surface sheet,
In the first step, at least a part or the entire part of the covering sheet corresponding to the linear part and a part or the whole part of the part corresponding to the side absorber are applied,
The manufacturing method of the disposable diaper which apply | coats an adhesive to a part or whole region of the part corresponding to the said linear part of the said surface sheet at least in the said 2nd process. Before applying an adhesive to the top sheet in the second step, a pair of leak-proof cuffs are bonded and fixed to the top sheet,
9. The method of manufacturing a disposable diaper according to claim 8, wherein each of the pair of leak-proof cuffs includes a leak-proof cuff forming sheet and an elastic member fixed to the leak-proof cuff forming sheet in an expanded state.

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