JP2008229007A - Expandable material cutting roll, production method of disposable diaper, and disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a production method of a disposable diaper with simple steps and high productivity and capable of surely cutting an expandable material. <P>SOLUTION: The producing method of the disposable diaper includes an expandable material cutting step of cutting the expandable material fixed to a sheet material constituting the disposable diaper, wherein the expandable material is cut by holding and pressurizing the sheet material 49 to which the expandable material (the expandable material 44 around an abdomen) is fixed, between a first roll in which a plurality of cutting projections are not arrayed in a straight line parallel to the axis of the roll and arranged to be displaced in the circumferential direction of the roll and a second roll 70 arranged so as to face the first roll. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention sandwiches a sheet provided with an elastic material between two rolls and cuts the elastic material by applying pressure. The present invention relates to a disposable diaper that is cut in an area overlapping with a body arrangement area.

  As the disposable diaper, for example, as in the disposable diaper 100 shown in FIG. 1, the disposable diaper is composed of the front body 2, the crotch 4, and the back body 6. A pants-type disposable diaper is known in which a single waist opening 10 and a pair of leg openings 12 (12a, 12b) are joined.

  In such a pants-type disposable diaper, as shown in FIG. 1, a portion along the waist opening 10 and the leg opening 12 and further between the waist opening 10 and the leg opening 12. In general, a configuration in which elastic materials such as rubber thread (waist elastic material 42, leg elastic material 40, belly elastic material 44) are arranged (see, for example, Patent Document 1).

  For example, as shown in FIG. 2, the disposable diaper as described above includes a long sheet material 49 (49a, 49b) made of nonwoven fabric or the like, a long waist elastic material 42, a leg elastic material 40, an abdomen. After continuously attaching the surrounding elastic material 44, fixing the absorbent main body 14 provided with the absorbent body 22, forming the hole 60 that later becomes the opening around the leg, and folding the sheet material 49 in half It is continuously manufactured by a method of obtaining a plurality of pants-type disposable diapers by forming the joint portion 8 by means such as heat sealing and separating the joint portion 8 at the portion.

  When the manufacturing method as described above is adopted, elastic materials such as waist elastic material, leg elastic material, and belly elastic material are continuously attached in the circumferential direction of the diaper. The force acts from the whole diaper circumferential direction.

  However, there are some diapers where it is not desired to apply the stretching force of the stretchable material. For example, the portion where the absorbent body is disposed is not preferable because the stretchability acts and the absorbent body contracts, because the fit of the diaper and the wearing feeling are hindered.

  Therefore, a disposable diaper has been proposed in which a stretchable material is attached only to a part of the diaper in the circumferential direction, and a portion where stretchable force does not act is formed. For example, in the disposable diaper 110 shown in FIG. 3, the belly stretchable material 44 is not attached to the portion where the absorbent body 22 is disposed, so that the stretch force of the belly stretchable material 44 does not act on that portion. A disposable diaper constructed.

  As a manufacturing method of the disposable diaper as described above, for example, an elastic tape in which an elastic material is bonded to a sheet-like support is used, and the elastic tape is intermittently disposed on a long nonwoven fabric sheet, thereby providing an elastic force. There has been proposed a method for manufacturing an absorbent article that can form a portion where no action occurs (see, for example, Patent Document 2).

  In addition, after continuously attaching a long stretchable material to a long sheet material, the sheet material provided with the stretchable material is cut with a first roll in which a plurality of cutting projections are arranged, and There has also been proposed a method for manufacturing an elastic sheet, which is sandwiched between a second roll in which a concave part into which a convex part is inserted is formed and the elastic material is cut afterwards (for example, see Patent Document 3). .

Registered Utility Model No. 3024357 Japanese Patent No. 3156251 JP 2002-178428 A

  However, the manufacturing method described in Patent Document 2 requires an additional step of creating an elastic tape in which an elastic material is bonded to a sheet-like support, and intermittently arranges the elastic tape on the nonwoven fabric sheet. There is a need. Therefore, the process is complicated and the method is not highly productive.

  On the other hand, since the manufacturing method described in Patent Document 3 only needs to sandwich a sheet material provided with an elastic material between two rolls, the manufacturing method described in Patent Document 2 can be simplified. There are advantages. However, in this manufacturing method, there are cases where the stretchable material cannot be cut well, and there still remains a problem to be solved in terms of reliably cutting the stretchable material.

  As described above, at present, there is no disclosure of a method for simplifying the process, high productivity, and reliable cutting of the stretchable material, and such a method is eagerly desired. The present invention has been made to solve the above-described problems of the prior art, and provides a method for manufacturing a disposable diaper that has a simple process, is highly productive, and can reliably cut an elastic material. To do.

  As a result of intensive studies to solve the problems of the prior art as described above, the present inventor, in a roll that cuts the elastic material of the disposable diaper, has a plurality of cutting projections directed obliquely with respect to the circumferential direction of the roll. As a result, it was conceived that the above-mentioned problems could be solved by arranging them, and the present invention was completed. Specifically, the present invention provides the following stretchable material cutting roll, a method for manufacturing a disposable diaper, and a disposable diaper.

[1] A first roll provided with cutting protrusions and a second roll disposed to face the first roll, the first roll having a plurality of cutting protrusions, A stretchable material cutting roll in which the cutting protrusions are not arranged in a straight line parallel to the axial direction of the roll but are shifted in the circumferential direction of the roll.

[2] The elastic material cutting roll according to [1], wherein the plurality of cutting protrusions are arranged in an oblique direction with respect to a circumferential direction of the roll.

[3] The first roll is divided into a plurality of regions in which a plurality of the cutting protrusions are divided along the rotation axis direction of the roll, and at least one of the regions is arranged in the plurality of regions. The elastic material cutting roll according to [2], further including a height adjusting mechanism for adjusting the height of the cutting protrusions arranged in one region.

[4] A screw hole capable of fixing a screw is formed in the first roll, and the plurality of cutting protrusions are attached to a block in which a through hole is formed, and the block is formed by a screw that penetrates the through hole. The elastic material cutting roll according to [3], wherein the elastic material cutting roll is fixed to the first roll, and the height adjusting mechanism has a structure in which a shim is sandwiched between the block and the first roll. .

[5] The frame further includes a frame-shaped pressing plate that presses the block against the roll, and the pressing plate is composed of two pressing plates divided at the center of the region, and the height adjusting mechanism The elastic material cutting roll according to [4], which has a structure in which shims having a shape corresponding to each of the two pressing plates are sandwiched.

[6] The elastic material cutting roll according to any one of [3] to [5], wherein a plurality of the cutting protrusions are attached to each of the plurality of regions.

[7] The elastic material cutting roll according to any one of [1] to [6], wherein the cutting protrusions are capable of forming a character-shaped cutting trace.

[8] An elastic material cutting step for cutting the elastic material fixed to the sheet material constituting the disposable diaper is provided, and the elastic material cutting step is arranged in a line in which a plurality of the cutting protrusions are parallel to the axial direction. The elastic material is fixed between the first roll that is not arranged and is displaced in the circumferential direction of the roll, and the second roll that is arranged to face the first roll. The manufacturing method of the disposable diaper which cut | disconnects the said elastic material by pinching | interposing a sheet | seat and pressing.

[9] The method for manufacturing a disposable diaper according to [8], wherein the first rolls are arranged in an oblique direction with respect to a circumferential direction of the rolls.

[10] As the first roll, the cutting protrusion is arranged along the rotation axis direction of the roll and divided into a plurality of areas, and the cutting protrusions arranged in the plurality of areas are used. The manufacturing method of the disposable diaper according to [8] or [9], wherein the cutting is performed after adjusting the height of at least one region.

[11] As the first roll, a screw hole capable of fixing a screw is formed, and the plurality of cutting protrusions are attached to a block in which a through hole is formed, and the block passes through the through hole. The manufacturing method of the disposable diaper according to [10], wherein the height of the cutting protrusion is adjusted by sandwiching a shim between the first roll and the block using the one fixed by the above.

[12] The first roll further includes a frame-shaped pressing plate that presses the block against the roll, and the pressing plate is composed of two pressing plates divided at the center of the region. The height of the cutting projection is adjusted by the method described above, wherein a shim having a shape corresponding to each of the two pressing plates is sandwiched between the first roll and the block. Manufacturing method for disposable diapers.

[13] As the first roll, a plurality of the plurality of cutting protrusions are provided in each of the plurality of regions, and the elastic material corresponds to the plurality of regions of the first roll. The method for producing a disposable diaper according to any one of [10] to [12], wherein each part is cut by a plurality of the cutting protrusions.

[14] The first roll having a cutting protrusion capable of forming a character-shaped cutting trace is used to cut the elastic material and to form a character-shaped cutting trace on the sheet material. -The manufacturing method of the disposable diaper in any one of [13].

[15] A disposable diaper manufactured by the manufacturing method according to any one of [8] to [14], wherein the diaper is disposed so as to cover the absorbent body and the surface of the absorbent body, and at least a part of the diaper is disposed. A top sheet made of a liquid-permeable material and a back sheet made of a liquid-impermeable material are arranged so as to cover the back surface of the absorbent body, and each part includes a front body, a crotch part, and a back body. The corresponding side edges of the front body and the back body are joined together to form one waist opening and a pair of leg openings, and the waist opening and the leg openings. A disposable diaper further comprising an abdominal circumference stretchable material disposed in a portion therebetween, wherein the abdominal circumference stretchable material is cut in a region overlapping with an arrangement region of the absorber.

[16] The method according to [15], further including a leg-surrounding elastic member disposed along the leg-surrounding opening, wherein the leg-surrounding elastic member is cut in a region overlapping the region where the absorber is disposed. Disposable diapers.

  The manufacturing method of the disposable diaper of this invention has a simple process, high productivity, and can cut | disconnect an elastic material reliably.

  Hereinafter, the best mode for carrying out the elastic material cutting roll, the disposable diaper manufacturing method, and the disposable diaper of the present invention will be specifically described. However, the present invention broadly encompasses stretchable material cutting rolls, manufacturing methods, and disposable diapers having the invention-specific matters, and is not limited to the following embodiments. For the convenience of drawing, FIGS. 4 and 8 are drawn by omitting a part of the configuration of the invention.

[1] Elastic material cutting roll:
The elastic material cutting roll of the present invention is disposed so as to face the first roll 54A and the first roll 54A provided with a cutting projection 52, such as an elastic material cutting roll 50A shown in FIG. The first roll 54A has a plurality of the cutting protrusions 52, and the plurality of cutting protrusions 52 are not arranged in a straight line parallel to the axial direction of the roll, They are arranged so as to be shifted in the circumferential direction of the roll.

  The stretchable material cutting roll of the present invention is a roll for cutting a stretchable material fixed to a sheet material constituting a disposable diaper. By sandwiching a sheet with a stretchable material between two rolls and applying pressure, the roll is cut. The elastic material is cut. This stretchable material cutting roll can be installed and used in a part of a disposable diaper manufacturing apparatus.

[1-1] First roll:
The first roll is one roll constituting an elastic material cutting roll. For example, like the first roll 54A shown in FIG. They are not arranged on a straight line parallel to the axial direction of the roll, but are shifted in the circumferential direction of the roll.

  When cutting protrusions are arranged on a straight line parallel to the rotation axis direction of the roll as in the conventional case, the cutting protrusions do not hit the entire sheet material uniformly, and there is a problem that a portion where cutting of the elastic material is insufficient is generated. was there. This is because a) the thickness of the sheet material varies depending on the part, b) the roll is bent and deformed by pressurization, c) the roll is deformed due to thermal expansion (not only pressure but also heat is applied to This is particularly remarkable when the roll is deformed by high-speed rotation or the like.

  In the case where the protrusions are not arranged in a straight line parallel to the axial direction of the roll as described above and are shifted from each other in the circumferential direction of the roll, the cutting protrusions can be used even in the cases a) to d). The sheet material to which the elastic material is fixed does not hit at once. That is, since the cutting protrusions sequentially hit the sheet material as the roll rotates, all the cutting protrusions are attached in a line along the rotation axis direction of the roll so that the cutting protrusions hit the sheet material (and thus the elastic material) at a time. Compared with a simple configuration, the applied pressure of the roll is not dispersed, and the applied pressure of the roll can be sufficiently applied to the sheet material and the stretchable material. Therefore, it is possible to press the cutting protrusions uniformly against the sheet material, and it is possible to reliably cut the stretchable material.

  In the present invention, the configuration is not particularly limited as long as the plurality of cutting protrusions are not arranged on a straight line parallel to the axial direction of the roll and are shifted in the circumferential direction of the roll. Absent. For example, a plurality of cutting projections are not arranged on a straight line parallel to the axial direction of the roll, but may be arranged at random positions. FIG. 17 shows a cut in which the abdomen stretchable material 44 is cut using a first roll that is not arranged in a straight line parallel to the axial direction of the roll and is arranged at random positions. It is a schematic diagram which shows the form of the mark 64. FIG.

  Among these, it is preferable that the plurality of cutting protrusions are arranged in an oblique direction with respect to the circumferential direction of the roll. For example, the elastic material cutting roll 50A shown in FIG. 4 is an example in which a plurality of cutting protrusions 52 in the first roll 54A are intermittently arranged in an oblique direction with respect to the circumferential direction of the roll. In this example, the cutting projections 52 are arranged with an inclination with respect to the circumferential direction of the roll. FIG. 5 is a view showing a state in which the disposable diaper in which the elastic material has been cut by the elastic material cutting roll 50A shown in FIG. 4 is developed. The leg elastic member 40 and the belly elastic member 44 on the back body 6 side are intermittently cut to form cut marks 64.

  Note that “in a direction oblique to the circumferential direction of the roll” means that the arrangement direction of the plurality of cutting protrusions is inclined with respect to the rotation direction of the roll. That is, the cutting protrusions are arranged in a direction that does not coincide with the circumferential direction of the roll. Further, as long as the cutting projections are arranged in an oblique direction with respect to the circumferential direction of the roll, it is not necessary that all the cutting projections are arranged in a straight line. For example, in the form described later, in which the cutting protrusions are divided into a plurality of areas, the arrangement angles of the cutting protrusions in each area may be different.

  The first roll is divided into a plurality of regions in which a plurality of the cutting protrusions are divided along the rotation axis direction of the roll, and the first roll is arranged in at least one region of the plurality of regions. It is preferable to further include a height adjusting mechanism for adjusting the height of the cutting projections arranged in the region. With such a configuration, even in the cases a) to d), considering the thickness of each part of the sheet material, deformation due to roll deformation and thermal expansion, and the degree of deformation of the roll due to high-speed rotation, It becomes possible to adjust the cutting protrusion to an appropriate height for each region. Therefore, it is possible to press the cutting protrusions uniformly against the sheet material, and it is possible to reliably cut the stretchable material.

  For example, the first roll 54B shown in FIGS. 6 to 8 has a plurality of cutting protrusions 52, and the cutting protrusions 52 are divided into a plurality of regions divided along the rotation axis (OO ′) direction of the roll. 56a, 56b, and 56c are arranged so as to be divided into a plurality of areas 56a, 56b, and 56c, and heights for adjusting the heights of the cutting protrusions 52a, 52b, and 52c arranged in the areas 56a, 56b, and 56c. An adjustment mechanism 58 is further provided.

  As long as the height of the cutting protrusion can be adjusted, the form of the height adjusting mechanism is not particularly limited. For example, a height adjusting mechanism including a block (support) in which a plurality of cutting protrusions are attached and a through hole is formed and a screw (bolt or the like) that penetrates the through hole can be exemplified. In this embodiment, a screw hole capable of fixing the screw is formed in the first roll, and the block is fixed to the first roll with the screw.

  The height adjusting mechanism may adjust the height of the block and thus the height of the cutting protrusion only by tightening the screw, but a shim ( A structure in which a metal thin plate or a spacer) is sandwiched is preferable. Such a height adjustment mechanism has an advantage that more precise height adjustment is possible depending on the thickness and number of shims.

  For example, the height adjustment mechanism 58a, 58b, 58c of the first roll 54B shown in FIGS. 6 to 8 includes a block (support) provided with a plurality of cutting protrusions 52 and formed with through holes, and the through holes. This is an example of a height adjusting mechanism including a screw 62 that passes through the frame, and further includes a frame-shaped pressing plate 60 that presses the block against the first roll 54B. In this example, a screw hole capable of fixing the screw 62 is formed in the first roll 54 </ b> B, and the block is fixed to the first roll 54 </ b> B by the screw 62. And this height adjustment mechanism 58a, 58b, 58c inserts the shim in which the through-hole which can insert the screw | thread 62 between the block and the 1st roll 54B was inserted, and adjusts height with the number of the shim. It is configured to be able to.

  The height adjusting mechanism further includes a frame-shaped pressing plate that presses the block against the roll, and the pressing plate is composed of two pressing plates divided at the center of the region. More preferably, the height adjusting mechanism has a structure in which a shim having a shape corresponding to each of the two pressing plates is sandwiched.

  For example, the height adjustment mechanisms 58a and 58c of the areas 56a and 56c of the first roll 54B shown in FIGS. 6 to 8 include two holding plates 60a and 60b, each having a holding plate 60 divided at the center of the areas 56a and 56c. 60b, and has a structure in which shims having a shape corresponding to each of the two pressing plates 60a and 60b can be sandwiched. In such a configuration, even when the center side of the roll is bent due to heating or pressurization, the number of shims sandwiched under the center side pressing plate 60a is more than the number of shims sandwiched under the side edge side pressing plate 60b. By increasing the number, the cutting protrusion 52 can be made to hit the sheet material accurately.

  The first roll 54B shown in FIGS. 6 to 8 includes the height adjustment mechanisms 58a, 58b, and 58c for all the regions 56a, 56b, and 56c. In the present invention, at least one first roll is provided. The height adjustment mechanism should just be provided about one area | region. For example, in the structure similar to the 1st roll 54B shown in FIGS. 6-8, what provided the height adjustment mechanism only in the area | region 56b of the roll center, or height adjustment mechanism only in the area | regions 56a and 56c of the roll side edge side. Even if it comprises, the height adjustment in the area | region is attained, Therefore The effect of this invention can be acquired.

  In the first roll, the region where the cutting protrusion is provided is divided into a plurality of regions. The number of regions is not particularly limited, but considering the case where the manufacturing method as shown in FIG. 2 is adopted, it corresponds to the arrangement part of the elastic material around the front body side and the elastic material around the back body side of the disposable diaper. Therefore, it is preferable to divide into at least two regions, at least three so as to correspond to the arrangement parts of the elastic material around the abdomen on the front body side, the elastic material around the legs on the crotch part, and the elastic material around the abdomen on the back body side It is more preferable to divide into regions.

  For example, in the elastic material cutting roll 50B shown in FIGS. 6 to 8, regions 56a, 56b, and 56c to which the cutting protrusions 52 of the first roll 54B are attached are elastic materials around the abdomen on the front body side of the disposable diaper, and legs of the crotch It is the example divided into three areas corresponding to the arrangement part of the circumference elastic material and the belly circumference elastic material of the back body side. FIG. 9 is a view showing a state in which a disposable diaper in which the elastic material has been cut by the elastic material cutting roll 50B shown in FIGS. 6 to 8 is developed, and the belly circumference elastic material 44 on the front body 2 side of the disposable diaper. The leg elastic member 40 of the crotch part 4 and the belly elastic member 44 on the back body 6 side are sequentially cut to form cut marks 64a, 64b and 64c.

  In addition, it is preferable to divide the region to which the cutting protrusion is attached into at least two regions as described above, and it is more preferable to divide into at least three regions, but it may be divided into four or more regions. . As described above, when a plurality of regions corresponding to the arrangement portions of the front body side abdominal stretch material and the back body side abdominal stretch material are formed, generally the number of the leg body stretch material is larger than the number of the cuts. This is preferable because the elastic material around the abdomen that is difficult to cut can be cut more reliably.

  Moreover, in a 1st roll, the area | region where the cutting protrusion was attached is divided along the rotating shaft direction of a roll. That is, the region needs to be divided into several parts in the direction of the rotation axis of the roll. For example, the stretchable material cutting roll 50B shown in FIGS. 6 to 8 has three regions 56a in which the region 56 to which the cutting protrusions 52 of the first roll 54B are attached is directed toward the rotation axis direction (OO ′ direction) of the roll. , 56b, 56c. However, as long as the area | region which attaches a cutting protrusion is divided along the rotating shaft direction of a roll, you may be divided along the circumferential direction of a roll.

  The first roll has a plurality of cutting protrusions, but the upper limit is not particularly limited. For example, a form in which a plurality of the cutting protrusions are attached to each of the plurality of areas is also a preferable form. For example, in the elastic material cutting roll 50B shown in FIGS. 6 to 8, the attachment area 56 of the cutting protrusion 52 in the first roll 54B is divided into three areas 56a, 56b, and 56c. In this example, ten plate-like cutting projections 52 are provided, and four plate-like cutting projections 52 are provided in the region 56b.

  As described above, in a form in which a plurality of cutting protrusions are attached to each of the plurality of areas, a plurality of cutting protrusions exist in the circumferential direction (rotation direction) of the roll. The attached form is more preferable. In such a case, even if the elastic material cannot be cut by one cutting projection, the second and subsequent cutting projections cut the elastic material, so that the elastic material can be cut more reliably. Become.

  For example, the first roll 54A shown in FIGS. 4 and 5, the first roll 54B shown in FIG. 8, and the first roll 54C shown in FIG. 10 have a plate-like cutting projection 52 in the circumferential direction (rotation direction) of the roll. In this example, the plate-like cutting projections 52 arranged in an inclined manner are arranged so as to partially overlap the circumferential direction (rotation direction) of the roll.

  The shape of the cutting protrusion is not particularly limited, and various shapes such as a rectangular shape, a dot shape, a circular shape, and a lattice shape can be employed. Especially, the plate-shaped cutting protrusion (cutting blade) with the high effect which cut | disconnects an elastic material can be used suitably.

  Moreover, in the first roll, it is also preferable that the cutting protrusion is capable of forming a character-shaped cutting mark. Such a form is advantageous in that the design effect of the product can be improved because the elastic material fixed to the sheet material by the cutting protrusion is cut and the cut mark of the character shape is drilled. There is.

  The “character” mentioned here is not limited to characters such as cartoon characters, anime characters, and animals, but may be characters, figures, symbols, or the like. For example, the cut mark 66 shown in FIG. 10 is a flower-shaped cut mark, and the cut mark 68 shown in FIG. 11 is a cut mark that visualizes the sun. The “cutting trace” may be formed by a single cutting protrusion, or may be formed by a plurality of cutting protrusions. For example, the cutting mark 66 shown in FIG. 10 and the cutting mark 68 shown in FIG. 11 are examples in which one character is formed by a plurality of cutting protrusions.

  The overall shape of the first roll is not particularly limited, but usually a cylindrical shape, for example, a shape similar to a conventionally known emboss roll is used. Although the material is not particularly limited, a metal material can be preferably used. Further, the first roll may be provided with a heater for cutting the stretchable material by applying heat as well as pressure, and a thermocouple for measuring the temperature of the roll.

[1-2] Second roll:
Similar to the first roll, the second roll is one roll that constitutes the elastic material cutting roll, and is disposed so as to face the first roll. Since the basic configuration is the same as that of the first roll, a description thereof will be omitted, and only portions different from the first roll will be described.

  Specific examples of the second roll include an embossing roll and a plain roll in which a recess that can be fitted with the cutting protrusion attached to the first roll is formed.

  The shape of the concave portion of the embossing roll used as the second roll is formed into a shape that can be fitted to the cutting protrusion of the first roll, for example, a shape complementary to the convex shape of the cutting protrusion. However, it is not always necessary for one recess to correspond to one cutting projection, and for example, one recess that can include and fit two or more cutting projections may be formed. Unlike the embossing roll, the plain roll has no unevenness on the surface and has a smooth surface. Therefore, there is an advantage that the operation of forming the concave portion in accordance with the shape of the cutting protrusion of the first roll is unnecessary, and the manufacturing is easy. Moreover, compared with the embossing roll, the alignment with the cutting protrusion of the first roll is unnecessary, which is preferable in that the adjustment of the machine is easy.

  Since the stretchable material cutting roll of the present invention cuts the stretchable material by sandwiching the sheet material with the stretchable material fixed between the first roll and the second roll, the second roll is the first roll. Arranged to face the roll. At this time, both rolls are arranged at positions where the cut protrusions of the first roll and the recesses of the second roll engage with each other, the sheet material is sandwiched between both rolls, and the sheet material is pressed with the roll, thereby expanding and contracting. The material can be cut.

[2] Disposable diaper manufacturing method:
The manufacturing method of the disposable diaper of the present invention includes an elastic material cutting step of cutting an elastic material fixed to a sheet material constituting the disposable diaper, wherein the elastic material cutting step includes a plurality of cutting projections in the axial direction. Between the first roll that is not arranged on a straight line that is parallel and is displaced in the circumferential direction of the roll, and the second roll that is arranged to face the first roll, The stretchable material is cut by sandwiching and pressing the sheet on which the stretchable material is fixed.

[2-1] Stretch material cutting step:
The elastic material cutting step in the manufacturing method of the present invention uses the first roll in which the plurality of cutting protrusions are not arranged on a straight line parallel to the axial direction but are shifted in the circumferential direction of the roll. There is a feature in the point. According to such a method, a) when the thickness of the sheet material varies depending on the part, b) when the roll is bent and deformed by pressurization, c) when the roll is deformed by thermal expansion (not only pressure but also heat is applied) Cutting the elastic material), d) Even when the roll is deformed by high-speed rotation, etc., the cutting protrusion can be pressed uniformly against the sheet material, and the elastic material can be cut reliably. It becomes.

  The production method of the present invention can be performed using, for example, the already described stretchable material cutting roll of the present invention. That is, the elastic material cutting roll of the present invention includes a first roll having a plurality of cutting protrusions, not arranged in a straight line parallel to the axial direction, and shifted in the circumferential direction of the roll. ing. Therefore, it can be suitably used in the production method of the present invention. In particular, it is preferable to use an elastic material cutting roll provided with a first roll in which a plurality of the cutting protrusions are arranged in an oblique direction with respect to the circumferential direction of the roll.

  In the manufacturing method of the present invention, as the first roll, the cutting projection is divided along a rotation axis direction of the roll and is divided into a plurality of areas, and is arranged in the plurality of areas. It is preferable to perform the cutting after adjusting the height of the cutting protrusion for at least one region. According to such a method, considering the thickness of each part of the sheet material, the deformation of the roll due to bending deformation and thermal expansion, and the degree of deformation of the roll due to high-speed rotation, the cutting protrusion is raised to an appropriate height for each region. Can be adjusted. Therefore, it is possible to press the cutting protrusions uniformly against the sheet material, and it is possible to reliably cut the stretchable material.

  Among them, as the first roll, a screw hole capable of fixing a screw is formed, and the plurality of cutting protrusions are attached to a block in which a through hole is formed, and the block is formed by a screw that penetrates the through hole. It is preferable to adjust the height of the cutting protrusion by using a fixed one and sandwiching a shim between the first roll and the block. Such a method has the advantage that more precise height adjustment is possible depending on the thickness and number of shims.

  The first roll further includes a frame-shaped pressing plate that presses the block against the roll, and the pressing plate is composed of two pressing plates divided at the center of the region. More preferably, the height of the cutting projection is adjusted by sandwiching a shim having a shape corresponding to each of the two pressing plates between the first roll and the block.

  For example, as shown in FIG. 6 to FIG. 8, there are provided first height adjusting mechanisms 58 a and 58 c each composed of two pressing plates 60 a and 60 b in which the pressing plate 60 is divided at the center of the regions 56 a and 56 c. If one roll 54B is used, even if the center side of the roll is bent due to heating or pressurization, the number of shims sandwiched below the center side pressing plate 60a is sandwiched below the side edge side pressing plate 60b. By increasing the number, it is possible to make the cutting projections 52 strike the sheet material accurately.

  The first roll 54B shown in FIGS. 6 to 8 includes the height adjusting mechanisms 58a, 58b, and 58c for all the regions 56a, 56b, and 56c. However, in the manufacturing method of the present invention, at least one region is provided. What has a height adjustment mechanism may be used. For example, in the structure similar to the 1st roll 54B shown in FIGS. 6-8, what provided the height adjustment mechanism only in the area | region 56b of the roll center, or height adjustment mechanism only in the area | regions 56a and 56c of the roll side edge side. The effect of the present invention can also be obtained using a device provided with

  In the manufacturing method of the present invention, as the first roll, a plurality of the cutting protrusions are provided in each of the plurality of regions, and the elastic material is used as the plurality of the first rolls. It is preferable that each of the parts corresponding to the region is cut by a plurality of the cutting protrusions. In such a method, even if the elastic material cannot be cut by one cutting projection, the second and subsequent cutting projections cut the elastic material, so that the elastic material can be cut more reliably. Become.

  In the manufacturing method of the present invention, as the first roll, a roll having a cutting projection capable of forming a character-shaped cutting trace is used, and the elastic material is cut and the character-shaped cutting trace is formed on the sheet material. It is preferable. Such a method is advantageous in that the design effect of the product can be improved because the elastic material fixed to the sheet material is cut by the cutting protrusions and the character-shaped cutting trace is drilled. There is.

  The production method of the present invention is not particularly limited with respect to the other steps as long as it includes the stretch material cutting step as described above, and can be produced according to a conventionally known method. Hereinafter, the manufacturing method of the present invention will be described with reference to an example of the manufacturing method shown in FIG. For the convenience of drawing, FIG. 12 is drawn in a form in which a part of the elastic material around the legs, the elastic material around the waist, and the elastic material around the abdomen are discarded. In FIG. 12, only the second roll 70 is shown in the elastic material cutting roll 50 </ b> A, but a first roll (not shown) is disposed at a position opposite to the second roll 70.

[2-2] Formation of absorbent main body:
First, as shown in FIG. 12, a pad-shaped absorbent main body 14 in which an absorbent body 22 is interposed between a top sheet and a back sheet is manufactured. For example, the absorber 22 wrapped in a hydrophilic sheet is disposed on the upper surface of the back sheet, and the top sheet is further disposed on the upper surface. Subsequently, the absorptive main body 14 is obtained by sealing the peripheral part of the absorber 22 so as to be sandwiched between the top sheet and the back sheet. The absorbent main body 14 has a three-dimensional gather 26, which is a leak-proof wall that can stand up three-dimensionally, by separately attaching a sheet material. These processes can be manufactured by a continuous manufacturing process by using a long sheet material as a constituent material of each member.

[2-3] Formation of exterior member continuum:
Next, an exterior member continuum comprising two sheet members 49 (49a, 49b), and a long waist elastic member 42, leg elastic member 40, and belly elastic member 44 are continuously provided between the sheet materials 49 (49a, 49b). Form. The long waist elastic member 42, leg elastic member 40, and belly elastic member 44 are fixed to a sheet material 49 made of nonwoven fabric or the like using a hot melt adhesive or the like. At this time, the hot melt adhesive is not applied to the position overlapping with the absorbent main body 14 (particularly, the absorber 22), or the application amount is reduced so that the stretchable material is not fixed to the sheet material 49. By doing so, the elastic material snaps back when the elastic material is cut later, so that the elastic force does not act on the part overlapping the absorber, and the necessary elastic force can be applied to the other parts. It becomes possible.

[2-4] Cutting elastic material:
Further, the exterior member continuous body formed as described above is sandwiched between and pressed by the elastic material cutting roll 50A, and at least the belly elastic member 44, preferably the leg elastic member 40 is further cut. At this time, it is also preferable to use a roll with a built-in heater and to cut the stretchable material while heating. In the illustrated example, the elastic material cutting roll 50A shown in FIG. 4 is used as the elastic material cutting roll, and the elastic material 40 around the legs is cut in addition to the elastic material 44 around the belly attached to the exterior member continuous body. is there. In this example, a cut mark 64 is formed on the back surface side (the outer surface side of the diaper) of the sheet material 49 by a first roll (not shown).

[2-5] Formation of diaper continuum:
Furthermore, after disposing and fixing the absorbent main body 14 intermittently in the longitudinal direction of the exterior member continuous body, a portion corresponding to the opening around the leg is cut out to form the hole 24. Then, after folding so that the side edges of the exterior member continuous body to which the absorbent main body 14 is fixed overlap each other, the gap portion of the absorbent main body 14 that is intermittently disposed and fixed is joined to the diaper side An edge joint 8 is formed to form a diaper continuum.

  In the example shown in FIG. 12, after folding so that the side edges of the exterior member continuum overlap each other (so that the upper edge of the drawing and the lower edge of the drawing overlap), they are intermittently disposed and fixed. The gap part of the absorptive main body 14 is joined in a line shape by heat sealing, and the diaper continuous body is formed by forming the joint part 8 on the diaper side edge.

[2-6] Production of pants-type disposable diapers:
Finally, a plurality of pants-type disposable diapers can be obtained by cutting the diaper continuous body at the joint 8 portion.

[3] Disposable diapers:
The disposable diaper of this invention is a disposable diaper manufactured by the manufacturing method of this invention like the disposable diaper 1A shown, for example in FIG.13 and FIG.14, and covers the absorber 22 and the surface of the said absorber. And a backsheet 20 made of a liquid-impermeable material and covering the back surface of the absorber 22, and a front body. 2, each part of the crotch part 4 and the back body 6, and the corresponding side edges of the front body 2 and the back body 6 are joined to each other so that one waist opening 10 and a pair of leg openings 12 (12a, 12b) is formed, and further includes an abdominal circumference elastic member 44 disposed in a portion between the waist circumference opening 10 and the leg circumference opening 12 (12a, 12b). The belly-surrounding stretchable members 44, a disposable diaper that has been cut in the region overlapping with the arrangement region of the absorbent body 22.

  Hereinafter, the disposable diaper of this invention is demonstrated by the example of a 2 piece type underpants type disposable diaper.

  In the present specification, the term “pants-type diaper” refers to joining by joining the corresponding side edges of the front body 2 and the back body 6 like the disposable diaper 1B shown in FIGS. 13 and 14. It is assumed that the diaper is formed in a pants shape in which a portion 8, one waist opening 10 and a pair of leg openings 12a and 12b are formed.

  And the “two-piece type” means an absorbent main body 14 that functions to absorb and retain the excrement of the wearer (absorption / holding function) and a function (wearing function) that encapsulates the wearer's body. It shall consist of the exterior member 16 to bear, and shall mean the diaper of the type by which the absorptive main body 14 was arrange | positioned inside the exterior member 16. FIG. The absorptive main body 14 is a member provided with an absorber 22, a top sheet 18, and a back sheet 20 as components.

  In addition, in this specification, “front body” means a part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. When the wearer wears a diaper, the part covering the inseam of the wearer means the part covering the back side (back of the body) of the wearer.

[3-1] Various elastic materials:
In the disposable diaper of the present invention, at least a belly stretchable material is disposed. Furthermore, it is preferable that an elastic material around the legs and an elastic material around the waist are arranged.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, preventing urine leakage from around the waist, and improving the fit of the diaper to the wearer, thereby preventing the diaper from falling down.

  An abdominal circumference elastic material is an elastic material arrange | positioned in the part (namely, part equivalent to a wearer's abdominal circumference) between a waist circumference opening part and a leg circumference opening part. By arranging the elastic material around the abdomen, it is possible to form a gather (tammy gather) rich in elasticity around the abdomen of the wearer. This Tammy Gather, together with West Gather, can make the diaper fit and anti-slip effect even better.

  About these elastic materials, the structure similar to the opening part elastic material already described is employable. Then, after considering the degree of gather contraction and the like, the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

  As for the disposable diaper of this invention, the said belly circumference elastic material is cut | disconnected in the area | region which overlaps with the arrangement | positioning area | region of the said absorber. Thus, by cutting the abdominal stretchable material in a region that overlaps the region where the absorbent body is disposed, it is possible to prevent a problem that the stretched force acts on the absorbent body and the absorbent body contracts. Therefore, it is excellent in fit and wearing feeling of the diaper. In addition to the belly stretchable material, cutting the leg stretchable material further improves this effect.

  For example, the disposable diaper 1A shown in FIG. 13 and FIG. 14 is an area where the leg elastic member 40 and the belly elastic member 44 overlap with the arrangement area of the absorber 22 by the elastic material cutting roll 50A shown in FIG. It is an example of the disposable diaper cut | disconnected in. In this example, a cutting mark 64 corresponding to the cutting protrusion 52 in the first roll 54A is formed.

  Moreover, the disposable diaper 1B shown in FIG.15 and FIG.16 is the arrangement | positioning area | region of the said absorber 22 with the said leg circumference elastic material 40 and the said belly circumference elastic material 44 by the elastic material cutting roll 50B shown in FIGS. It is an example of the disposable diaper cut | disconnected in the area | region which overlaps. In this example, cutting marks 64a, 64b, and 64c corresponding to the cutting protrusions 52a, 52b, and 52c in the first roll 54C are formed. The disposable diaper 1B shown in FIGS. 15 and 16 has an advantage that it is excellent in appearance because it has fewer cut marks than the disposable diaper 1A shown in FIGS. For example, a design of a character or the like may be drawn on the back sheet 20 of the absorbent main body 14 (particularly around the abdomen of the front body 2 to the back body 6 to the upper part of the crotch 4). Even in such a case, the disposable diaper 1B shown in FIGS. 15 and 16 has an advantage that the visibility of the design is hardly hindered by the cut marks and is excellent in appearance.

  There is no restriction | limiting in particular about the disposable diaper of this invention, It can manufacture according to a conventionally well-known disposable diaper.

[3-2] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable.

  It is preferable that the absorber is interposed at least in part between the top sheet and the back sheet. Usually, the absorber is interposed between the top sheet and the back sheet by being sandwiched between the top sheet and the back sheet and sealing the peripheral edge thereof. Therefore, the flap part in which the absorber is not interposed is formed between the top sheet and the back sheet at the peripheral part of the absorber.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned.

[3-3] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the upper surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the lower surface side needs to absorb the wearer's urine.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and subjected to a hydrophilic treatment. The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials.

[3-4] Backsheet:
A back seat | sheet is a sheet | seat arrange | positioned so that the lower surface (surface located in a wearer's clothing side at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

[3-5] Absorbent body:
In the two-piece type pants-type diaper, the top sheet, the back sheet, and the absorbent body are configured as one member called an “absorbent body” that is responsible for absorption and holding functions, and an exterior member that is manufactured separately. A pants-type diaper is formed by joining. This absorbent main body has a structure in which a top sheet is disposed on the upper surface side of the absorbent body and a back sheet is disposed on the lower surface side, and the absorbent body is interposed between the top sheet and the back sheet.

  An absorptive main body is comprised by the size which covers at least the crotch part of a diaper. However, in order to ensure the effect of preventing leakage, it is preferable to have a size that covers not only the crotch part but also a part of the front body and the back body. The absorptive main body can be fixed to the exterior member using, for example, a hot melt adhesive.

[3-6] Exterior member:
The exterior member is a member having a mounting function for encapsulating the wearer's body, and specifically, is a sheet-like member that forms the front body, the crotch portion, and the back body.

  In the two-piece type pants-type diaper, the absorbent main body serves exclusively for the absorption / holding function of absorbing and holding the excrement of the wearer, so a liquid-impermeable material as a material constituting the exterior member There is no need to use. Examples of the material constituting the exterior member include a nonwoven fabric composed of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins.

  And in order to fix an exterior member in the state which pinched | interposed the elastic material etc. around the leg, in many cases, it is comprised by bonding together 2 or more sheet | seat materials (it is comprised with a nonwoven fabric etc.). For example, the disposable diaper 1A shown in FIG. 13 and FIG. 14 and the disposable diaper 1B shown in FIG. 15 and FIG. 16 are constructed by bonding the exterior member 16 to each other with two sheet materials, and around the legs between the layers of these sheet materials. This is an example in which the elastic material 40, the waist elastic material 42, and the belly elastic material 44 are sandwiched and fixed.

[3-7] Solid gather:
In order to prevent side leakage of urine excreted by the wearer, a three-dimensional gather may be provided. The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to be able to stand up three-dimensionally. By forming such a three-dimensional gather, urine is excreted on the top sheet, and even if the urine diffuses along the top sheet, the three-dimensional gather becomes a breakwater, from the opening around the leg of the diaper, etc. Leakage (so-called “lateral leakage”) can be effectively prevented.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, a stretchable material (a three-dimensional gathered stretchable material) disposed on a part of the water-repellent sheet material and a sheet (gather) formed on the sheet material by the three-dimensional gathered stretchable material can be suitably used.

  The stretchable material cutting roll of the present invention and the production method of the present invention can be suitably used for the production of the disposable diaper of the present invention. Further, the disposable diaper of the present invention can be used as an absorbent article for infants or adults such as elderly people and persons with disabilities who need care.

It is a schematic perspective view which shows one embodiment of the conventional disposable diaper, and is the figure which shows the state which looked at the conventional disposable diaper from the front. It is a schematic plan view which shows one Embodiment of the manufacturing method of the conventional disposable diaper. It is a schematic perspective view which shows another embodiment of the conventional disposable diaper, and is a figure which shows the state which looked at the conventional disposable diaper from the front. It is a schematic perspective view which shows one Embodiment of the elastic material cutting roll of this invention. It is a schematic plan view which shows the state which expand | deployed the disposable diaper manufactured using the elastic material cutting roll shown in FIG. It is a schematic sectional drawing which shows typically one Embodiment of the manufacturing method of the disposable diaper of this invention. It is a schematic front view which shows another embodiment of the elastic material cutting roll of this invention. It is a schematic perspective view which shows another embodiment of the elastic material cutting roll of this invention, and is a figure which shows the elastic material cutting roll shown in FIG. It is a schematic plan view which shows the state which expand | deployed the disposable diaper manufactured using the elastic material cutting roll shown in FIG. It is a top view which shows an example of the cutting trace of the character shape formed with the elastic material cutting roll of this invention. It is a top view which shows another example of the cutting trace of the character shape formed with the elastic material cutting roll of this invention. It is a schematic plan view which shows one Embodiment of the manufacturing method of the disposable diaper of this invention. It is a front view showing one embodiment of the disposable diaper of the present invention. It is a rear view of the disposable diaper shown in FIG. It is a front view which shows another embodiment of the disposable diaper of this invention. It is a rear view of the disposable diaper shown in FIG. It is a schematic diagram which shows the form of the cutting trace which cut | disconnected the belly circumference elastic material using the elastic material cutting roll of this invention.

Explanation of symbols

1A, 1B, 100, 110: disposable diapers, 2: front body, 4: crotch, 6: back body, 8: joint, 10: waist opening, 12, 12a, 12b: leg opening, 14 : Absorbent body, 16: exterior member, 18: top sheet, 20: back sheet, 22: absorber, 24: hole, 26: three-dimensional gather, 40: elastic material around leg, 42: elastic material around waist, 44: Abdominal circumference elastic material, 49, 49a, 49b: sheet material, 50A, 50B: elastic material cutting roll, 52: cutting projection, 54A, 54B: first roll, 56a, 56b, 56c: region, 58, 58a, 58b, 58c: Height adjustment mechanism, 60, 60a, 60b: Presser plate, 62: Screw, 64, 64a, 64b, 64c, 66, 68: Cutting trace, 70: Second roll.

Claims (16)

A first roll provided with a cutting protrusion, and a second roll arranged to face the first roll,
The first roll has a plurality of the cutting protrusions,
A stretchable material cutting roll in which the plurality of cutting protrusions are not arranged on a straight line parallel to the axial direction of the roll but are shifted in the circumferential direction of the roll.   The elastic material cutting roll according to claim 1, wherein the plurality of cutting protrusions are arranged in an oblique direction with respect to a circumferential direction of the roll.   The first roll is divided into a plurality of areas in which a plurality of the cutting protrusions are divided along the rotation axis direction of the roll, and the first roll is arranged in at least one of the areas. The stretchable material cutting roll according to claim 2, further comprising a height adjusting mechanism for adjusting a height of the arranged cutting protrusion. A screw hole capable of fixing a screw to the first roll is formed,
The plurality of cutting protrusions are attached to a block in which a through hole is formed,
The block is fixed to the first roll by a screw penetrating the through hole,
The stretchable material cutting roll according to claim 3, wherein the height adjusting mechanism has a structure in which a shim is sandwiched between the block and the first roll. A frame-like pressing plate that presses the block against the roll;
The pressing plate is composed of two pressing plates divided at the center of the region,
The stretchable material cutting roll according to claim 4, wherein the height adjusting mechanism has a structure in which shims having a shape corresponding to each of the two pressing plates are sandwiched.   The stretchable material cutting roll according to any one of claims 3 to 5, wherein a plurality of the cutting protrusions are attached to each of the plurality of regions.   The stretchable material cutting roll according to any one of claims 1 to 6, wherein the cutting protrusion is capable of forming a character-shaped cutting mark. An elastic material cutting step for cutting an elastic material fixed to a sheet material constituting a disposable diaper is provided,
In the elastic material cutting step, the plurality of cutting protrusions are not arranged on a straight line parallel to the axial direction, and the first roll is disposed so as to be shifted in the circumferential direction of the roll; The manufacturing method of the disposable diaper which cut | disconnects the said elastic material by pinching | interposing and pressing the said sheet | seat with which the said elastic material was fixed between the 2nd roll arrange | positioned so as to oppose each other.   The manufacturing method of the disposable diaper of Claim 8 using what is arranged in the diagonal direction with respect to the circumferential direction of a roll as said 1st roll. As the first roll, the cutting protrusion is divided along the rotation axis direction of the roll, and is used by being divided into a plurality of regions,
The method for manufacturing a disposable diaper according to claim 8 or 9, wherein the cutting is performed after adjusting the height of the cutting protrusions arranged in the plurality of regions for at least one region. As the first roll, a screw hole capable of fixing a screw is formed, and the plurality of cutting protrusions are attached to a block in which a through hole is formed, and the block is fixed by a screw penetrating the through hole. Use
The manufacturing method of the disposable diaper of Claim 10 which adjusts the height of the said cutting protrusion by pinching a shim between the said 1st roll and the said block. As the first roll, further comprising a frame-shaped pressing plate that presses the block against the roll, the pressing plate is composed of two pressing plates divided at the center of the region,
The disposable diaper according to claim 11, wherein a height of the cutting protrusion is adjusted by sandwiching a shim having a shape corresponding to each of the two pressing plates between the first roll and the block. Production method. As the first roll, a plurality of the cutting protrusions attached to each region of the plurality of regions,
The manufacturing method of the disposable diaper as described in any one of Claims 10-12 which cut | disconnects the said expansion-contraction material with each of the said cutting | projection protrusion for each of the site | part corresponding to the said several area | region of the said 1st roll. . As the first roll, one having a cutting projection capable of forming a character-shaped cutting trace,
The manufacturing method of the disposable diaper as described in any one of Claims 8-13 which forms the cut trace of a character shape in the said sheet | seat material while cut | disconnecting the said elastic material. It is the disposable diaper manufactured by the manufacturing method as described in any one of Claims 8-14,
An absorber, a top sheet that is arranged so as to cover the surface of the absorber, and at least partly made of a liquid permeable material, and a back sheet that is arranged so as to cover the back surface of the absorber. A back seat, and a front body, a crotch part, and a back body, each side edge portion corresponding to the front body and the back body is joined to each other, and one waist opening and a pair of An opening around the leg is formed,
An abdomen elastic member disposed in a portion between the waist opening and the leg opening;
The disposable diaper by which the said belly circumference elastic material is cut | disconnected in the area | region which overlaps with the arrangement | positioning area | region of the said absorber. Further comprising a leg circumference elastic member disposed along the leg circumference opening,
The disposable diaper according to claim 15, wherein the leg-surrounding stretchable material is cut in a region overlapping with a region where the absorber is disposed.

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