JP4965157B2 - Method for manufacturing absorbent article - Google Patents

Description

  The present invention relates to a method for manufacturing an absorbent article that receives excrement from a wearer.

  Conventionally, disposable diapers have been used as one of the absorbent articles that receive excrement from the wearer, such as S size, M size, L size, LL size, XL size, according to the wearer's body shape Roughly sized sizes are manufactured and sold.

In Patent Document 1, as a method of manufacturing disposable pants of different sizes in one manufacturing line, sheet-like absorbent articles folded in half at the center in the longitudinal direction are joined at the left and right sides in the width direction. And when making it into a pants type, the technique which switches the size of the trunk circumference of a disposable pants and the leg circumference by changing the distance between the junction parts on either side is disclosed.
JP-A-8-56888

  By the way, in recent years, the demand for disposable diapers for adults is increasing, and wearers of various body types use disposable diapers. For this reason, disposable diapers of various sizes are demanded.

  Also, because the user's body shape changes with age, the size of the disposable diaper used may not fit, and excrement may leak from the disposable diaper or the waistline may be tightened, reducing the wearing feeling. is there. However, even if trying to wear one size smaller or larger, there is a risk that excrement may leak from the gap because it is too small to be worn or too large. Therefore, a disposable diaper having a size that is finely divided into as many stages as possible is required.

  On the other hand, in disposable diapers of different sizes, the width and length of the entire disposable diaper and the width and length of the absorbent core that absorbs moisture such as urine are usually different. One method of manufacturing an absorbent core is to wrap an absorbent material such as pulp or super absorbent resin powder adsorbed on the side surface of a substantially cylindrical suction drum with tissue paper or the like. Are often in the form of an hourglass or a battledore according to the body shape of the user. In the suction drum, normally, the circumferential length of the drum (that is, the circumferential length of the side surface of the drum) is an integral multiple of the length of the absorption core.

  In such a manufacturing method for absorbent cores, when producing disposable diapers of different sizes, it is necessary to prepare different suction drums for each size of the absorbent core, so that disposable diapers of sizes that are finely divided into multiple stages are produced. If it tries to do it, many suction drums will be needed and the manufacturing cost of a disposable diaper will increase. In addition, when trying to manufacture disposable diapers of different sizes on one production line, it is necessary to change the suction drum at the time of switching the size, and it takes a lot of time and labor to switch the size, and manufacturing disposable diapers This will cause an increase in cost.

  This invention is made | formed in view of the said subject, and aims at switching easily manufacture of several types of absorbent articles from which size differs.

The invention described in claim 1 is a method for manufacturing a plurality of types of absorbent articles having different sizes and receiving excrement from a wearer, and a) a substantially cylindrical suction that rotates about a predetermined rotation axis the absorbent material is supplied toward the side of the drum, a plurality of suction regions arranged in a circumferential direction around the rotation axis on the side, sequentially adsorbing the absorbent material while rotating the suction drum And b) sequentially transferring the absorbent material from the plurality of adsorption regions onto a moving body that moves in the moving direction of the side surface while contacting or approaching the side surface of the rotating suction drum. Forming an absorbent core sheet, c) cutting the absorbent core sheet at a position corresponding to a boundary between the plurality of adsorption regions, and forming a plurality of absorbent cores; d) a longitudinal direction Transported to the second The plurality of absorption cores are arranged on the sheet member in the longitudinal direction at a predetermined arrangement pitch, and the plurality of absorption cores are covered with a second sheet member from the side opposite to the first sheet member and the first Joining the sheet member and the second sheet member around the plurality of absorbent cores to form an absorbent article sheet that is a continuous body;
e) cutting the absorbent article sheet between the plurality of absorbent cores to form a plurality of sheet-like absorbent articles, and in the step d), the plurality of absorbent cores The arrangement pitch can be switched between a first pitch and a second pitch larger than the first pitch, and the arrangement pitch is set to the first pitch. By forming the absorbent article and setting the arrangement pitch as the second pitch, in the step e), the absorption in the second size is longer in the longitudinal direction than the absorbent article of the first size. When the absorbent article is formed and the absorbent article of the second size is formed, in the step b), the ratio of the rotational speed of the suction drum to the moving speed of the movable body is absorbed in the first size. Nature The length in the longitudinal direction of the absorbent core of the absorbent article of the second size is made longer than the length of the absorbent core of the absorbent article of the first size, in step a), you thicker than the formation of the thickness of the absorbent material to be adsorbed to the plurality of retaining regions of an absorbent article of the first size.

Invention of Claim 2 is a manufacturing method of the absorbent article of Claim 1 , Comprising: In the said longitudinal direction, the length of the said absorption core of the absorbent article of said 2nd size is said 1st. It is 105% or less of the length of the said absorption core of the absorbent article of 1 size.

The invention according to claim 3, a method of manufacturing an absorbent article according to claim 1 or 2, wherein d) after the step, f) the respective central positions of the plurality of absorbent cores both sides of the width direction perpendicular to the longitudinal direction, by cutting a portion of said absorbent article sheet, or by cutting a portion of said first sheet or said second sheet of the plurality of absorbent articles several A step of forming a leg notch of the second size absorbent article is used to form a leg notch of the absorbent article of the first size. that performed utilizing the cutter, the shape of the away leg cut of the absorbent article of the second size, to be the same as said first size shape-away leg cut of the absorbent article.

Invention of Claim 4 is a manufacturing method of the absorbent article of Claim 1 or 2 , Comprising: After the said d) process, it is parallel to the said absorbent article sheet | seat conveyed, and a conveyance direction. The absorbent article sheet is sandwiched by a rotary die cutter that rotates about a rotation axis perpendicular to the rotation axis, whereby the absorption is performed on both sides in the width direction perpendicular to the longitudinal direction at the center of each of the plurality of absorption cores. further comprising a step of forming a outs plurality of legs cut by cutting a part of the sexual article sheet, when forming an absorbent article of the second size, the relative conveyance speed of the absorbent article sheet By making the ratio of the rotational speed of the rotary die cutter smaller than that at the time of forming the absorbent article of the first size, the pitch in the longitudinal direction of the plurality of leg cutouts becomes the first support. It is larger than the pitch of said plurality of legs notch in the absorbent article's.
Invention of Claim 5 is a manufacturing method of the absorbent article of Claim 1 or 2, Comprising: After the said d) process, it is parallel and conveyed to these absorbent articles to be h) conveyed. By sandwiching the plurality of absorbent articles by a rotary die cutter that rotates about a rotation axis perpendicular to the direction, on both sides in the width direction perpendicular to the longitudinal direction of each central position of the plurality of absorbent cores, When forming the second size absorbent article, further comprising a step of cutting a part of the first sheet or the second sheet of the plurality of absorbent articles to form a plurality of leg cutouts. Further, by making the ratio of the rotational speed of the rotary die cutter to the transport speed of the plurality of absorbent articles smaller than that at the time of forming the absorbent article of the first size, the plurality of leg cutouts Pitch in longitudinal direction is larger than the pitch of outs plurality of legs cutting the absorbent article of the first size.

In the present invention, the production of a plurality of types of absorbent articles having different sizes can be easily switched. Further , the length of the absorption core can be changed without changing the shape of the suction area of the suction drum. In inventions of claims 3 to 5, it is possible to prevent an increase in cost related to the manufacture of a plurality of types of absorbent articles having different sizes.

  FIG. 1 is a plan view showing a configuration of an absorbent article 1 manufactured by an absorbent article manufacturing apparatus according to an embodiment of the present invention. Absorbent article 1 that receives excrement from a wearer is an open-type disposable diaper that is worn around a waist around a portion that abuts on the wearer's stomach and a portion that abuts on the back. In FIG. 1, the absorbent article 1 is drawn with the surface in contact with the wearer (that is, the wearer side) facing forward.

  FIG. 2 is a cross-sectional view of the absorbent article 1 cut along a plane perpendicular to the longitudinal direction (ie, the vertical direction in FIG. 1) at the position AA shown in FIG. As shown in FIGS. 1 and 2, the absorbent article 1 includes a substantially sheet-like main body 2 and a width direction perpendicular to the longitudinal direction over substantially the entire length of the main body 2 (that is, FIG. 1). It is provided with a pair of side wall portions 3 provided on both sides in the left-right direction).

  As shown in FIG. 1 and FIG. 2, the main body 2 includes an absorbent core 22 that is an absorbent body, a top sheet 21 that covers a main surface of the absorbent core 22 on the wearer side, and a wearer side of the absorbent core 22. A back sheet 23 is provided to cover the opposite main surface. The top sheet 21 and the back sheet 23 are joined to each other around the absorbent core 22 by a hot melt adhesive or the like, and the side wall portion 3 is joined to the side of the absorbent core 22.

  As shown in FIG. 1, the absorbent core 22 has a shape (so-called hourglass shape) in which the width of both end portions in the longitudinal direction is larger than the width of the intermediate portion in plan view. In the absorbent article 1, leg cuts that become openings for legs when worn on both sides in the width direction of the position in the substantially center in the longitudinal direction of the absorbent core 22 (that is, the position where the width of the absorbent core 22 is narrow). A notch 25 is formed. The edge of the leg cutout 25 has a straight portion and a curved portion, and the shape of the edge is determined so that the absorbent article 1 is properly adhered around the wearer's leg.

  As shown in FIG. 1 and FIG. 2, the side wall 3 includes a side sheet 31 in which an outer portion in the width direction is bonded onto the top sheet 21 and the back sheet 23, and an inner end in the width direction of the side sheet 31. The elastic member 32 extended in the longitudinal direction joined to the part is provided. As shown in FIG. 1, the elastic member 32 is in an expanded state when the absorbent article 1 is expanded. In the absorbent article 1, when the elastic member 32 contracts, as shown in FIG. 2, the side wall portion 3 rises toward the wearer side on the side of the main body portion 2, and near the base of the wearer's foot when worn. A three-dimensional gather that abuts on is formed. Each side wall 3 may be provided with a plurality of elastic members 32.

  As shown in FIGS. 1 and 2, in the absorbent article 1, the top sheet 21, the side sheet 31, the back sheet 23, and the vicinity of the end in the width direction at the position where the leg notch 25 is formed. A plurality of elastic members 33 extending in the longitudinal direction are joined. In the absorbent article 1, when the elastic member 33 contracts, the outer portions (so-called side flap portions) in the width direction of the top sheet 21, the side sheet 31, and the back sheet 23 are gathered to form a leg of the wearer. Leg gathers along the circumference are formed. As shown in FIG. 1, the end of the elastic member 33 in the longitudinal direction extends to between the back sheet 23 and the absorbent core 22.

  In the main body 2, a plurality of elastic members 26 extending in the width direction are joined between the top sheet 21 and the back sheet 23 on the outer side of both ends in the longitudinal direction of the absorbent core 22. By contracting, the outer portion of the top sheet 21 and the back sheet 23 in the longitudinal direction (so-called end flap portion) is gathered to form a waist gather along the circumference of the wearer's torso. .

  The top sheet 21 is a non-woven fabric formed of a liquid-permeable material, for example, a hydrophilic fiber, and quickly captures moisture of excrement from the wearer and moves it to the absorbent core 22. Nonwoven fabrics used as the top sheet 21 are, for example, point bond nonwoven fabrics, air-through nonwoven fabrics, and spunlace nonwoven fabrics. As hydrophilic fibers forming these nonwoven fabrics, cellulose, rayon, cotton, or the like is usually used. As the top sheet 21, a liquid-permeable nonwoven fabric formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) whose surface is hydrophilically treated with a surfactant may be used. Alternatively, a plastic film having an aperture may be used.

  The absorbent core 22 is made of an absorbent material obtained by mixing a hydrophilic fiber (for example, pulverized pulp fiber or cellulose fiber) with a granular water-absorbing polymer (for example, SAP (Super Absorbent Polymer)), tissue paper, or a liquid-permeable nonwoven fabric. The upper layer sheet 221 and the lower layer sheet 222 (see FIG. 2) and the like are wrapped so as to absorb moisture that has passed through the top sheet 21 and quickly fix it. The upper layer sheet 221 and the lower layer sheet 222 wrapping the hydrophilic fiber are bonded to the absorbent material (that is, the hydrophilic fiber and the water-absorbing polymer) with a hot melt adhesive, so that the hydrophilic fiber loses its shape and the water-absorbing polymer. Prevents falling off (especially after water absorption).

  The back sheet 23 is a water-repellent or liquid-impervious non-woven fabric, and moisture that has permeated through the top sheet 21 and moisture that has been absorbed by the absorbent core 22 are placed on the side opposite to the wearer side of the main body 2. To prevent it from sticking out. Nonwoven fabrics used as the backsheet 23 are, for example, spunbond nonwoven fabrics, meltblown nonwoven fabrics, and SMS (spunbond / meltblown / spunbond) nonwoven fabrics, and may be subjected to water repellent treatment as necessary.

  As the back sheet 23, a water-repellent or liquid-impervious plastic film or a composite material in which the nonwoven fabric is laminated on the outside of the plastic film may be used. When a plastic film is used for the back sheet 23, it is preferable that a plastic film having moisture permeability (that is, air permeability) is used from the viewpoint of the wearer's comfort.

  The side sheet 31 is formed of a water-repellent or liquid-impervious nonwoven fabric (for example, a spunbond nonwoven fabric, a melt blown nonwoven fabric, an SMS nonwoven fabric), a plastic film, or a composite material thereof. From the viewpoint of improving the comfort of the absorbent article 1, it is preferable that the side sheet 31 has air permeability.

  As the elastic members 26, 32, 33, polyurethane yarn, polyurethane film, natural rubber or the like is used. In this embodiment, a polyurethane yarn having a fineness of 300 to 1850 dtex is used as each elastic member, and in a state of being stretched 1.1 to 5 times, hot melt adhesive, thermocompression bonding, or ultrasonic waves are used. It is joined to the side sheet 31 or the like by an appropriate joining method such as joining.

  As shown in FIG. 1, the absorbent article 1 is at one end in the longitudinal direction of the main body 2 (that is, the lower end in FIG. 1 and a portion that contacts the wearer's back). A pair of fastening portions 24 attached to both sides in the width direction is further provided. When the absorbent article 1 is worn, two hook-and-loop fasteners 241 provided on each of the pair of fastening portions 24 are connected to the other end portion in the longitudinal direction of the main body portion 2 (that is, the upper end portion in FIG. 1). Yes, at the part abutting on the wearer's abdomen side) and fastened to the frontal tape 242 provided on the opposite side of the wearer side.

  The surface fastener 241 of the fastening portion 24 has a large number of minute hook members, and these hook members engage with the loop member of the frontal tape 242 when the surface fastener 241 is fastened. The frontal tape 242 may be a non-woven fabric or other fabric. In this case, the hook member of the hook-and-loop fastener 241 is detachably joined to a fiber group such as a non-woven fabric. Further, when the back sheet 23 is formed of a nonwoven fabric, the frontal tape 242 may be omitted, and the surface fastener 241 may be directly attached to the back sheet 23. In the fastening part 24, instead of the hook-and-loop fastener 241, an adhesive such as a hot melt adhesive may be provided.

  Next, an absorbent article manufacturing apparatus for manufacturing the absorbent article 1 will be described. FIG. 3 is a diagram illustrating a configuration of the absorbent article manufacturing apparatus 4. The absorbent article manufacturing apparatus 4 pulverizes the pulp 9 supplied by the pulp supply mechanism 41 on the downstream side of the pulp supply mechanism 41 on the downstream side of the pulp supply mechanism 41 and the pulp supply mechanism 41 that supplies the thin plate-like pulp 9 cut to a certain size. The absorbent article 1 is formed using the pulp crushing mechanism 42, the absorbent core forming mechanism 43 that forms the absorbent core 22 using the pulverized pulp generated by the pulp crushing mechanism 42, and the absorbent core 22 formed by the absorbent core forming mechanism 43. An absorbent article forming mechanism 44 to be formed, and a control unit 5 for controlling these mechanisms are provided.

  The pulp supply mechanism 41 includes a pulp placement unit 411 on which a plurality of stacked pulps 9 are placed, a pulp takeout mechanism 412 for taking out the pulp 9 one by one from the pulp placement unit 411, and a pulp 9 from the pulp takeout mechanism 412. A conveyor 413 that receives and conveys it to the downstream side, and a supply path 414 that is arranged on the downstream side of the conveyor 413 and guides the pulp 9 to the pulp crushing mechanism 42 are provided.

  The pulp crushing mechanism 42 rotates on the outer peripheral surface by rotating around a rotation axis parallel to the width direction of the pulp 9 (that is, the direction perpendicular to the paper surface in FIG. 3 and hereinafter referred to as “depth direction”). A pulverizing cylinder 421 for pulverizing the pulp 9 entering toward it is provided. The crushing cylinder 421 includes a plurality of substantially disc-shaped crushing blades arranged along the rotation axis, and each crushing blade includes a plurality of teeth at a constant pitch on the outer periphery. In the pulp crushing mechanism 42, the thin pulp 9 is pulverized by the plurality of teeth of the pulverizing cylinder 421 to generate pulverized pulp.

  The absorption core forming mechanism 43 is provided in the middle of the duct 431 and the duct 431 in which the pulverized pulp generated by the pulp pulverizing mechanism 42 is conveyed by air sent from a blower mechanism (not shown) and absorbs water to the pulverized pulp. A polymer supply unit 432 that mixes a polymer (for example, SAP (Super Absorbent Polymer)) to generate an absorbent material, and a rotation shaft 4330 parallel to the depth direction in FIG. A substantially cylindrical suction drum 433 that adsorbs an absorbent material is provided on a side surface 4331 provided with fine suction holes by sucking air by a suction mechanism (not shown).

  FIG. 4 is a diagram showing the side surface 4331 of the suction drum 433 in an expanded state. On the side surface 4331 of the suction drum 433, portions near the upper and lower edges in FIG. 4 are covered with a plate 4332 that does not transmit air, and between the upper and lower plates 4332, the direction of the rotation shaft 4330 (that is, A plurality of so-called hourglass-shaped widths (six in this embodiment), each of which changes in the circumferential direction around the rotation axis 4330 (that is, the left-right direction in FIG. 4), in the vertical direction in FIG. An air permeable region 4333 is formed. In FIG. 4, a boundary 4334 between a plurality of air transmission regions 4333 continuously arranged in the circumferential direction is indicated by a two-dot chain line. In the suction drum 433, the absorbent material is adsorbed only in the air transmission region 4333 by suction from the rotating shaft 4330 side. In the following description, each of the plurality of air permeable regions 4333 is referred to as an “adsorption region 4333”.

  As shown in FIG. 3, the absorbent core forming mechanism 43 is also a roll in which an upper layer sheet member 91 and a lower layer sheet member 92 that become the upper layer sheet 221 and the lower layer sheet 222 (see FIG. 2) of the absorbent core 22 are wound. Roll attachment portions 434 and 435 to which the adhesive is attached, adhesive supply portions 4341 and 4351 for applying an adhesive (for example, hot melt adhesive) to the upper layer sheet member 91 and the lower layer sheet member 92, a first compression portion 436, and a sheet cutting portion 437, a first cutting unit 438, and conveyors 4301 to 4303 are provided.

  The absorbent article forming mechanism 44 includes a roll attachment portion 441 to which a roll around which a first sheet member 93 serving as the back sheet 23 (see FIG. 2) of the absorbent article 1 is wound, and the top sheet 21 (see FIG. 2). A roll mounting portion 442 to which a roll wound with a second sheet member 94 to which a sheet member to be the side wall portion 3 (see FIG. 2) is joined on both sides in the width direction of the sheet member to be attached, the first sheet member 93 and the second sheet member 94, adhesive supply units 4411 and 4421 for applying an adhesive (for example, hot melt adhesive), a second compression unit 443, a notch forming unit 444, a second cutting unit 445, and a conveyor 4401. To 4405.

  Next, the flow of manufacturing the absorbent article 1 by the absorbent article manufacturing apparatus 4 will be described. FIG. A and FIG. B is a figure which shows the flow of manufacture of the absorbent article 1. FIG. In the absorbent article manufacturing apparatus 4, a plurality of types of absorbent articles having different sizes can be manufactured. In the following description, first, FIG. A and FIG. The manufacture of absorbent articles of one size will be described along B, and then the switching to the manufacture of absorbent articles of different sizes will be described. In addition, since many absorbent articles are actually manufactured continuously, the following steps are performed in parallel.

  When the absorbent article 1 is manufactured by the absorbent article manufacturing apparatus 4, first, the sheet-like pulp 9 sequentially supplied by the pulp supply mechanism 41 shown in FIG. 3 is pulverized by the pulp pulverization mechanism 42. Pulp is generated (step S11).

  Subsequently, the pulverized pulp is moved toward the suction drum 433 in the duct 431 of the absorbent core forming mechanism 43 by the air blown from the blower mechanism (not shown), and the water-absorbing polymer is mixed by the polymer supply unit 432 to absorb the absorbent material. Then, the air is sprayed toward the side surface 4331 of the suction drum 433 rotating at a constant speed in the clockwise direction in FIG. The absorbent material (that is, the pulverized pulp and the water-absorbing polymer) has a predetermined thickness in a plurality of adsorption regions 4333 (see FIG. 4) arranged in the circumferential direction around the rotation shaft 4330 on the side surface 4331 of the suction drum 433. Are sequentially adsorbed (step S12). Note that mixing of the water-absorbing polymer may be omitted depending on the absorbing power required for the absorbent core 22.

  Next, the lower layer sheet member 92 is fed out from the roll attached to the roll attachment portion 435, and the adhesive is applied onto the upper surface thereof by the adhesive supply portion 4351, and then held on the conveyor 4301. The conveyor 4301 (the belt thereof) is in contact with or close to the side surface 4331 of the rotating suction drum 433, and the moving direction of the side surface 4331 (more precisely, the lower layer sheet member 92 and the conveyor 4301 and the side surface 4331 of the suction drum 433 are closest to each other). It is a moving body that moves in the moving direction of the side surface 4331 at the position where it moves, and the tangential direction of the side surface 4331 at that position, and the lower layer sheet member 92 is conveyed downstream by the conveyor 4301.

  The absorbent material adsorbed by the plurality of adsorption regions 4333 of the suction drum 433 moves to the lower side of the suction drum 433 (that is, the lower layer sheet member 92 side) with the rotation of the suction drum 433, and the lower layer sheet member 92. The suction by the suction drum 433 is released above and is sequentially transferred from the plurality of suction areas 4333 to the lower sheet member 92 on the conveyor 4301. On the lower layer sheet member 92, the transferred absorbent material is bonded with an adhesive to form the pulp layer 900 (step S13).

  When the pulp layer 900 and the lower layer sheet member 92 are conveyed to the downstream side, the upper layer sheet member 91 is fed out from the roll attached to the roll attachment unit 434, and the adhesive supply unit 4341 causes the upper layer sheet member 91 to be placed on one side surface. Adhesive is applied. The pulp layer 900 on the lower sheet member 92 (that is, the absorbent material) is covered from the opposite side of the lower sheet member 92 by the upper sheet member 91 with the application surface of the adhesive facing the pulp layer 900. The upper layer sheet member 91 and the pulp layer 900 are joined, and the upper layer sheet member 91 and the lower layer sheet member 92 are joined at the side of the pulp layer 900 to form a continuous body of the absorbent core 22 (see FIG. 1). An absorbent core sheet 901 is formed (step S14).

  Subsequently, in the first compression unit 436, the absorbent core sheet 901 is sandwiched and compressed by the two rollers from above and below (step S15). Thereby, the adhesive strength between the upper layer sheet member 91, the lower layer sheet member 92, and the pulp layer 900 is improved, and the density (that is, hardness) of the pulp layer 900 is adjusted. The absorbent core sheet 901 that has passed through the first compression unit 436 is conveyed to the sheet excision unit 437 by the conveyor 4302 and has a narrow width of the absorbent material (that is, a site near the center in the longitudinal direction of each absorbent core 22). In both sides in the width direction, surplus portions of the upper layer sheet member 91 and the lower layer sheet member 92 are excised (step S16).

  The absorbent core sheet 901 that has passed through the sheet cutting section 437 is further conveyed downstream by the conveyor 4303, and the first cutting section 438 corresponds to a boundary 4334 (see FIG. 4) between the plurality of suction regions 4333. A plurality of absorbent cores 22 are formed by sequentially cutting in the direction perpendicular to the conveying direction (step S17).

  In the absorbent article manufacturing apparatus 4, the moving speed of the conveyor 4401 is made larger than the moving speed of the conveyor 4303, so that the plurality of absorbent cores 22 are arranged on the conveyor 4401 at a predetermined interval, and are downstream by the conveyor 4401. It is conveyed to the side. In the absorbent article forming mechanism 44, the first sheet member 93 is fed out from the roll attached to the roll 441, the adhesive is applied to the upper surface by the adhesive supply unit 4411, and then the longitudinal direction (that is, the conveyor 4402) , In the left direction in FIG. In the absorbent article forming mechanism 44, the frontal tape 242 (see FIG. 1) is joined to the lower surface of the first sheet member 93 by a joining mechanism (not shown) between the roll mounting portion 441 and the conveyor 4402. The elastic member 33 is joined to the upper surface of 93.

  The plurality of absorbent cores 22 are received by the first sheet member 93 on the conveyor 4402 and arranged in the longitudinal direction on the first sheet member 93 at a predetermined arrangement pitch (step S18). The plurality of absorbent cores 22 are conveyed downstream together with the first sheet member 93 in a state of being bonded onto the first sheet member 93. Next, the elastic member 26 and the fastening portion 24 (see FIG. 1) are joined to the first sheet member 93 on the conveyor 4402 by a joining mechanism (not shown). The joining of the elastic member 26 and the fastening portion 24 may be performed before the arrangement of the absorbent core 22 on the first sheet member 93.

  When the absorbent core 22 and the first sheet member 93 are conveyed to the downstream side, the second sheet member 94 is unwound from the roll attached to the roll 442, and one surface of the second sheet member 94 is provided by the adhesive supply unit 4421. An adhesive is applied to the surface. The plurality of absorbent cores 22 on the first sheet member 93 are covered from the opposite side of the first sheet member 93 by the second sheet member 94 with the application surface of the adhesive facing the absorbent core 22, The sheet member 94 and the absorbent core 22 are joined, and the first sheet member 93 and the second sheet member 94 are joined around the absorbent core 22 to form a continuous body of the absorbent article 1 (see FIG. 1). A certain absorbent article sheet 902 is formed (step S19). FIG. 6 is a plan view showing the absorbent article sheet 902. In the absorbent article forming mechanism 44, the fastening portions 24 on both sides of the absorbent article sheet 902 are folded back toward the second sheet member 94 as shown in FIG.

  Subsequently, in the second compression unit 443 shown in FIG. 3, the absorbent article sheet 902 is sandwiched from above and below by the two rollers and compressed (step S20). Thereby, the adhesive strength between the 1st sheet | seat member 93, the 2nd sheet | seat member 94, and the absorption core 22 is improved. The absorbent article sheet 902 that has passed through the second compression unit 443 is further conveyed downstream by the conveyor 4403 and is conveyed to the notch forming unit 444.

  The notch forming portion 444 is a rotary die cutter that rotates about a rotation axis that is parallel to the absorbent article sheet 902 conveyed downstream and perpendicular to the conveyance direction (that is, a rotation axis that faces the depth direction in FIG. 3). It is. The notch forming portion 444 has a blade having a shape corresponding to the leg notch 25 (see FIG. 2) on the outer surface and is centered on a rotation axis facing the depth direction in FIG. 3 above the absorbent article sheet 902. A rotating blade 4441 that rotates substantially cylindrical and a rotating shaft that faces the depth direction on the lower side of the absorbent article sheet 902, and the absorbent article sheet 902 is sandwiched between the rotating blade 4441 and the blade. An anvil roll 4442 for cutting a part of the anvil is provided.

  In the absorbent article manufacturing apparatus 4, the absorbent article sheet 902 is sandwiched by the notch forming portion 444 (that is, the rotary blade 4441 and the anvil roll 4442 of the rotary die cutter) so that the longitudinal direction of each of the plurality of absorbent cores 22 is reduced. On both sides of the central position in the width direction, a part of the first sheet member 93 and the second sheet member 94 of the absorbent article sheet 902 shown in FIG. 6 (that is, a portion 9021 indicated by parallel oblique lines in FIG. 6). ) Are cut off to form a plurality of leg cutouts 25 (see FIG. 1) (step S21). In the absorbent article sheet 902, the pitch of the plurality of leg cutouts 25 in the longitudinal direction is made equal to the arrangement pitch of the plurality of absorbent cores 22. In the notch forming portion 444, a part of the first sheet member 93 or the second sheet member 94 is matched to the shape of the first sheet member 93 and the second sheet member 94, the shape of the leg notch 25, and the like. Only a part of may be excised.

  The absorbent article sheet 902 in which the leg cutouts 25 are formed is conveyed further downstream by the conveyor 4404 shown in FIG. 3, and is conveyed at a predetermined position between the plurality of absorbent cores 22 by the second cutting unit 445. A plurality of sheet-like absorbent articles 1 are formed by being sequentially cut perpendicular to the direction (step S22). Then, the plurality of absorbent articles 1 are sequentially carried out from the absorbent article manufacturing apparatus 4 by the conveyor 4405. In the absorbent article manufacturing apparatus 4, each absorbent article 1 may be folded so as to fit the size of the packaging bag before the absorbent article 1 is carried out. Or the some absorbent article 1 of the folded state may be formed by cut | disconnecting after the absorbent article sheet | seat 902 is folded from an edge part.

  Next, switching of the size of the absorbent article manufactured by the absorbent article manufacturing apparatus 4 will be described. FIG. 7 shows a second size absorbent article 1a having a length L1 in the longitudinal direction longer than that of the first size absorbent article 1 shown in FIG. 1 (hereinafter referred to as “first absorbent article 1”). It is a top view which shows (henceforth "the 2nd absorbent article 1a"). The second absorbent article 1a includes an absorbent core 22a having a length L2 in the longitudinal direction longer than the absorbent core 22 of the first absorbent article 1 shown in FIG. In the present embodiment, the length L2 of the absorbent core 22a in the longitudinal direction is 105% of the length of the absorbent core 22. In FIG. 7, illustration of a part of the right fastening portion 24 is omitted for the sake of illustration.

  The flow of manufacturing the second absorbent article 1a is shown in FIG. A and FIG. The flow of manufacturing the first absorbent article 1 shown in FIG. When the 2nd absorbent article 1a is manufactured by the absorbent article manufacturing apparatus 4 shown in FIG. 3, a water absorbing polymer is first mixed with the pulverized pulp produced | generated from the pulp 9 on a thin plate, and an absorbent material is obtained. It is sequentially adsorbed to a plurality of adsorption regions 4333 (see FIG. 4) on the side surface 4331 of the suction drum 433 that is generated and rotated at a constant speed equal to that at the time of manufacturing the first absorbent article 1 (steps S11 and S12). ).

  Subsequently, the lower layer sheet member 92 that is drawn out from the roll attachment portion 435 and has an adhesive applied to the upper surface thereof is conveyed downstream by the conveyor 4301. In the absorbent article manufacturing apparatus 4, the conveyor 4301 is controlled by the control unit 5, so that the moving speed of the conveyor 4301 (that is, the conveyance speed of the lower layer sheet member 92) is higher than that at the time of manufacturing the first absorbent article 1. Increased. In the present embodiment, the moving speed of the conveyor 4301 at the time of manufacturing the second absorbent article 1a is 107% of the moving speed of the conveyor 4301 at the time of manufacturing the first absorbent article 1.

  In the absorption core forming mechanism 43, the absorbent material adsorbed on the side surface 4331 of the suction drum 433 is sequentially transferred from the plurality of adsorption regions 4333 to the lower sheet member 92 on the conveyor 4301, and the pulp layer is formed on the lower sheet member 92. 900 is formed (step S13). In the manufacture of the second absorbent article 1a, the moving speed of the conveyor 4301 is larger than that at the time of manufacturing the first absorbent article 1 while the rotation speed of the suction drum 433 is equal to that at the time of manufacturing the first absorbent article 1. Therefore, the length in the longitudinal direction of the portion corresponding to each adsorption region 4333 in the pulp layer 900 (that is, the length in the longitudinal direction of the absorbent core 22a) becomes longer than that in manufacturing the first absorbent article 1. .

  Next, a pulp layer 900 on the lower layer sheet member 92 is covered from the side opposite to the lower layer sheet member 92 by the upper layer sheet member 91 that is fed out from the roll mounting portion 434 and coated with an adhesive on one side surface. The sheet member 91 and the lower layer sheet member 92 are joined to form an absorbent core sheet 901 that is a continuous body of the absorbent core 22a (see FIG. 7) (step S14).

  The absorbent core sheet 901 is compressed by the first compression unit 436, the excess portions of the upper layer sheet member 91 and the lower layer sheet member 92 are cut by the sheet cutting unit 437, and further cut by the first cutting unit 438. Thereby, the some absorption core 22a (refer FIG. 7) is formed (step S15-S17). In the absorbent article manufacturing apparatus 4, the first cutting unit 438 is controlled by the control unit 5, so that the cutting timing in the first cutting unit 438 relative to the movement of the conveyor 4303 is compared to when the first absorbent article 1 is manufactured. (That is, the distance that the absorbent core sheet 901 on the conveyor 4303 moves between one cut and the next cut is increased). As a result, the length L2 in the longitudinal direction of the absorbent core 22a is made longer than the absorbent core 22 of the first absorbent article 1.

  In the absorbent article manufacturing apparatus 4, when the moving speed of the conveyor 4401 is made larger than the moving speed of the conveyor 4303, the plurality of absorbent cores 22 a are arranged on the conveyor 4401 at a predetermined interval and moved downstream. Be transported. In the absorbent article manufacturing apparatus 4, the control unit 5 controls the conveyor 4401 so that the ratio of the moving speed of the conveyor 4401 to the moving speed of the conveyor 4303 is larger than that at the time of manufacturing the first absorbent article 1. . Thereby, the pitch of the some absorption core 22a on the conveyor 4401 is made larger than the time of manufacture of the 1st absorbent article 1. FIG.

  In the absorbent article forming mechanism 44, the first sheet member 93, which is drawn out from the roll mounting portion 441 and coated with an adhesive on the upper surface and the elastic member 33 and the frontal tape 242 are bonded to the upper and lower surfaces, is downstream by the conveyor 4402. The plurality of absorbent cores 22a are arranged at a predetermined arrangement pitch on the first sheet member 93 (step S18). In the manufacture of the second absorbent article 1a, the pitch of the plurality of absorbent cores 22a on the conveyor 4401 is made larger than that at the time of manufacturing the first absorbent article 1, so that the plurality of absorbent cores on the first sheet member 93 is made. The arrangement pitch of 22a (hereinafter referred to as “second pitch”) is also made larger than the arrangement pitch of the plurality of absorbent cores 22 (hereinafter referred to as “first pitch”) when the first absorbent article 1 is manufactured. .

  Subsequently, after the elastic member 26 and the fastening portion 24 are joined to the first sheet member 93, the second sheet member 94 that is drawn out from the roll attachment portion 442 and applied with an adhesive on one surface thereof, The plurality of absorbent cores 22a on the first sheet member 93 are covered from the side opposite to the first sheet member 93, and the first sheet member 93 and the second sheet member 94 are joined together to absorb the absorbent article 1a (see FIG. 7). ) Is formed (step S19).

  In the absorbent article forming mechanism 44, after the fastening portion 24 is folded back toward the second sheet member 94, the absorbent article sheet 902 is compressed by the second compression portion 443 (step S20). Then, the absorbent article sheet 902 is conveyed to the notch forming portion 444 by the conveyor 4403, and in the notch forming portion 444, the absorbent property is absorbed on both sides in the width direction at the substantially central position of each of the plurality of absorbent cores 22a. A part of the first sheet member 93 and the second sheet member 94 of the article sheet 902 is cut off to form a plurality of leg cutouts 25 (step S21).

  As described above, the second pitch that is the arrangement pitch of the plurality of absorbent cores 22a in the absorbent article sheet 902 is more than the first pitch that is the arrangement pitch of the plurality of absorbent cores 22 when the first absorbent article 1 is manufactured. Is also big. In the absorbent article manufacturing apparatus 4, the notch forming unit 444 is controlled by the control unit 5, whereby the rotating blade 4441 and the anvil roll 4442 rotate with respect to the moving speed of the conveyor 4403 (that is, the conveying speed of the absorbent article sheet 902). The ratio of speed is made smaller than that at the time of manufacturing the first absorbent article 1. Thereby, the pitch in the longitudinal direction of the plurality of leg cutouts 25 is made larger than that at the time of manufacturing the first absorbent article 1 and is made equal to the arrangement pitch (that is, the second pitch) of the absorbent cores 22a. As a result, in the absorbent article sheet 902, positions corresponding to each of the plurality of absorbent cores 22a arranged at the second pitch larger than the first pitch (that is, both sides in the width direction of the center in the longitudinal direction of each absorbent core 22a). ) Is formed with leg cutouts 25. Moreover, the shape of the leg part notch 25 of the 2nd absorbent article 1a becomes a shape which expanded the shape of the leg part notch 25 of the 1st absorbent article 1 in the longitudinal direction.

  Thereafter, the absorbent article sheet 902 is conveyed to the second cutting unit 445 by the conveyor 4404, and the absorbent article sheet 902 is moved in the conveyance direction at a predetermined position between the plurality of absorbent cores 22a in the second cutting unit 445. A plurality of sheet-like second absorbent articles 1a are formed by sequentially cutting vertically (step S22). In the absorbent article manufacturing apparatus 4, the second cutting unit 445 is controlled by the control unit 5, so that the cutting timing in the second cutting unit 445 relative to the movement of the conveyor 4404 is compared to when the first absorbent article 1 is manufactured. (That is, the distance that the absorbent article sheet 902 on the conveyor 4404 moves between one cut and the next cut is increased). As a result, the length L1 in the longitudinal direction of the second absorbent article 1a is made longer than that of the first absorbent article 1.

  As described above, in the absorbent article forming mechanism 44 of the absorbent article manufacturing apparatus 4, when the absorbent core is arranged on the first sheet member 93 in step S18, the arrangement pitch of the absorbent core is the first pitch. Switching between a second pitch larger than the first pitch is possible, and by setting the arrangement pitch as the first pitch, the first absorbent article 1 is formed in step S22, and the arrangement pitch is changed to the second pitch. Thus, in step S22, the second absorbent article 1a having a longer length in the longitudinal direction than the first absorbent article 1 is formed. Thus, in the absorbent article manufacturing apparatus 4, the absorbent article forming mechanism 44 is controlled by the control unit 5, so that the production of two types of absorbent articles having different sizes can be easily switched.

  Further, in the absorbent article forming mechanism 44, the length in the longitudinal direction is set to the first absorbent article in step S22 by setting the arrangement pitch of the absorbent cores to a third pitch different from the first pitch and the second pitch in step S18. Absorbent articles having other sizes different from those of the first and second absorbent articles 1a can also be formed. That is, in the absorbent article manufacturing apparatus 4, the manufacture of a plurality of types (two or more types) of absorbent articles having different sizes can be easily switched.

  When the absorbent core forming mechanism 43 sequentially transfers the absorbent material from the plurality of suction regions 4333 of the suction drum 433 onto the lower layer sheet member 92 in step S13 when the second absorbent article 1a is formed, the lower layer sheet member 92 is transferred. The ratio of the rotational speed of the suction drum 433 to the transport speed (that is, the moving speed of the conveyor 4301) is made smaller than that at the time of forming the first absorbent article 1, whereby the absorbent core 22a of the second absorbent article 1a. Is longer than the length of the absorbent core 22 of the first absorbent article 1.

  As described above, in the absorbent article manufacturing apparatus 4, the absorbent core forming mechanism 43 is controlled by the control unit 5, so that the length of the absorbent core can be easily changed without changing the shape of the suction region 4333 of the suction drum 433. Can be changed. Thereby, a plurality of types of absorbent articles having different-sized absorbent cores can be easily manufactured without replacing the suction drum 433 or the like. As a result, it is possible to reduce the cost for manufacturing absorbent articles having a plurality of sizes.

  Since the absorbent article manufacturing apparatus 4 can manufacture absorbent articles of a plurality of types at a low cost, it is possible to easily manufacture absorbent articles having sizes that are finely divided into multiple stages. Thus, the difference in size between absorbent articles of different sizes is reduced (preferably, in two types of absorbent articles of adjacent sizes, the length of one absorbent core is set to the length of the other absorbent core. 105% or less.) By manufacturing absorbent articles of various sizes, for wearers of various body shapes, or for wearers whose body shape has changed slightly due to aging, etc. Thus, it is possible to provide an absorbent article having a good wearing feeling (particularly adhesion).

  By the way, when the length of the absorption core is increased by reducing the ratio of the rotation speed of the suction drum 433 to the conveyance speed of the lower layer sheet member 92 without changing the shape of the suction region 4333 as described above, the suction drum At the time of transfer from 433 to the lower layer sheet member 92, the absorbent material is stretched in the longitudinal direction. Therefore, if the thickness of the absorbent material adsorbed on the adsorption region 4333 is constant, the thickness of the absorbent core 22a of the second absorbent article 1a is slightly thinner than the absorbent core 22 of the first absorbent article 1. Become. In the absorbent core forming mechanism 43, when the second absorbent article 1a is formed, the pulverization speed of the pulp 9 is increased, and the thickness of the absorbent material adsorbed on the adsorption region 4333 is set when the first absorbent article 1 is formed. By making it thicker, the thickness of the absorbent core 22a can be made equal to the thickness of the absorbent core 22 of the first absorbent article 1.

  In the notch forming portion 444 of the absorbent article forming mechanism 44, when the second absorbent article 1a is formed, the formation of the leg notch 25 in step S21 is the formation of the leg notch 25 of the first absorbent article 1. This is performed using a rotary die cutter (that is, a rotary blade 4441 and an anvil roll 4442) to be used. As described above, by forming the leg notch 25 without changing the cutter in manufacturing absorbent articles of different sizes, it is possible to prevent an increase in costs related to manufacturing of a plurality of types of absorbent articles having different sizes. Can do. In addition, by changing the ratio of the rotational speed of the rotary die cutter to the transport speed of the absorbent article sheet 902, the pitch in the longitudinal direction of the leg notch 25 can be changed, so that a plurality of types of absorptions having different sizes can be obtained. It is possible to more easily manufacture the property article.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  In the transfer of the absorbent material in step S13, the ratio of the rotational speed of the suction drum 433 to the moving speed of the conveyor 4301 is made smaller during the production of the second absorbent article 1a than when the first absorbent article 1 is formed. For example, the rotation speed of the suction drum 433 may be made lower than that at the time of manufacturing the first absorbent article 1 while keeping the moving speed of the conveyor 4301 constant. Moreover, both the moving speed of the conveyor 4301 and the rotational speed of the suction drum 433 may be changed.

  In step S17, for example, in parallel with the formation of the absorbent core by cutting the absorbent core sheet 901, both sides (that is, the corners) in the width direction of the longitudinal ends of the absorbent core may be cut off. Further, the cutting of the corner may be performed in parallel with the cutting of excess portions of the upper layer sheet member 91 and the lower layer sheet member 92 in the sheet cutting unit 437.

  In the arrangement of the absorbent cores on the first sheet member 93 in step S18, when the second absorbent article 1a is manufactured, the moving speed of the conveyor 4401 is made equal to the moving speed of the conveyor 4303, and the moving speed of the conveyor 4402 is the conveyor 4401. The ratio with respect to the moving speed is made larger than that at the time of manufacturing the first absorbent article 1, so that the arrangement pitch of the plurality of absorbent cores 22 a may be larger than the arrangement pitch of the plurality of absorption cores 22.

  If the formation of the leg cutout 25 in step S21 is performed after the formation of the absorbent article sheet 902, it is not necessarily performed on the absorbent article sheet 902, and absorption by the second cutting section 445 is performed. After cutting the absorbent article sheet 902, a plurality of absorbent articles may be sequentially performed. In this case, a plurality of absorbent articles are sequentially conveyed to the notch forming portion 444 and sandwiched by a rotary die cutter, whereby the back sheet 23, the top sheet 21 and a part of the side wall portion 3 of each absorbent article are cut off. The

  In the suction drum 433 of the absorption core forming mechanism 43, a plurality of suction regions 4333 are not necessarily provided continuously. For example, FIG. As shown in the development view of A, the plurality of adsorption regions 4333a may be intermittently arranged on the side surface 4331 with the non-adsorption region 4332a interposed therebetween. FIG. As shown in B, a rectangular suction region 4333b whose width in the rotation axis direction (that is, the vertical direction in FIG. 8.B) is constant in the circumferential direction (that is, the horizontal direction in FIG. 8.B) is a side surface. Multiple pieces may be arranged in the circumferential direction on 4331.

  In the absorbent article according to the above embodiment, the upper layer sheet 221 and the lower layer sheet 222 (see FIG. 2) enclosing the absorbent material may be omitted. In this case, in the absorbent core forming mechanism 43, the absorbent material adsorbed on the side surface 4331 of the suction drum 433 is directly transferred onto the belt of the conveyor 4301 to form the pulp layer 900, and is conveyed downstream by the conveyor 4301. Is done. Then, after being compressed by the first compression unit 436 and cut by the first cutting unit 438, the compressed product is transported to the absorbent article forming mechanism 44 and arranged on the first sheet member 93. In addition, it is preferable that the pulp layer 900 is covered with the upper layer sheet member 91 and the lower layer sheet member 92 from a viewpoint of smoother conveyance of an absorptive material, and suppression of scattering of the fiber in an absorptive material.

  In the absorbent article forming mechanism 44, instead of the roll attachment portion 442 to which the roll of the second sheet member 94 is attached, a roll of a sheet member (hereinafter referred to as “top sheet member”) that becomes the top sheet 21 of the absorbent article. , And a roll attachment portion to which a roll of a sheet member (hereinafter referred to as “side wall portion sheet member”) as a pair of side wall portions 3 is individually attached, and the top sheet member covers the absorbent core and the first After being joined to the sheet member 93, the side wall sheet members may be joined to both sides in the width direction.

  In the notch forming portion 444 of the absorbent article forming mechanism 44, for example, a liftable cutter may be used instead of the rotary die cutter. In this case, the shape of the leg notch 25 formed in the first absorbent article 1 and the second absorbent article 1a is the same.

  The manufacturing method of the absorbent article which concerns on the said embodiment is also the manufacture of absorbent articles other than an open type disposable diaper, such as an auxiliary | assistant absorbent tool attached and used inside a pants-type disposable diaper and a disposable diaper. This makes it possible to easily manufacture a plurality of types of absorbent articles having different sizes.

It is a top view of an absorptive article. It is sectional drawing of an absorbent article. It is a figure which shows the structure of an absorbent article manufacturing apparatus. It is an expanded view which shows the side surface of a suction drum. It is a figure which shows the flow of manufacture of an absorbent article. It is a figure which shows the flow of manufacture of an absorbent article. It is a top view of an absorptive article sheet. It is a top view of the 2nd absorptive article. It is an expanded view which shows the side surface of another suction drum. It is an expanded view which shows the side surface of another suction drum.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a Absorbent article 22,22a Absorption core 25 Leg part notch 93 1st sheet member 94 2nd sheet member 433 Suction drum 444 Notch formation part 901 Absorption core sheet 902 Absorbent article sheet 4301 Conveyor 4330 Rotating shaft 4331 Side surface 4333 , 4333a, 4333b Adsorption region 4334 Boundary 4441 Rotating blade 4442 Anvil roll S11-S22 Step

Claims (5)

A method of manufacturing a plurality of types of absorbent articles having different sizes from each other that receive excrement from a wearer,
a) A plurality of adsorption regions that supply a water-absorbing material toward a side surface of a substantially cylindrical suction drum that rotates about a predetermined rotation axis, and that are arranged on the side surface in a circumferential direction about the rotation axis in a step of sequentially adsorbing the absorbent material while rotating the suction drum,
b) An absorbent core that is a continuous body by sequentially transferring the absorbent material from the plurality of adsorption regions onto a moving body that moves in the moving direction of the side surface while contacting or approaching the side surface of the rotating suction drum. Forming a sheet;
c) cutting the absorbent core sheet at a position corresponding to a boundary between the plurality of adsorption regions to form a plurality of absorbent cores;
d) The plurality of absorbent cores are arranged in the longitudinal direction at a predetermined arrangement pitch on the first sheet member conveyed in the longitudinal direction, and the plurality of absorbent cores are arranged from the side opposite to the first sheet member. Covering the two sheet members and joining the first sheet member and the second sheet member around the plurality of absorbent cores to form an absorbent article sheet that is a continuous body;
e) cutting the absorbent article sheet between the plurality of absorbent cores to form a plurality of sheet-like absorbent articles;
With
In the step d), the arrangement pitch of the plurality of absorption cores can be switched between a first pitch and a second pitch larger than the first pitch,
By setting the arrangement pitch as the first pitch, an absorbent article having a first size is formed in the step e), and by setting the arrangement pitch as the second pitch, the longitudinal length in the step e). A second size absorbent article having a length in the direction longer than the first size absorbent article is formed ;
When forming the absorbent article of the second size, in the step b), the ratio of the rotational speed of the suction drum to the moving speed of the moving body is set from the time of forming the absorbent article of the first size. The length in the longitudinal direction of the absorbent core of the absorbent article of the second size is made longer than the length of the absorbent core of the absorbent article of the first size, and in the step a) the method of an absorbent article, wherein to Rukoto thicker than the formation of the absorbent article of the plurality of the thicknesses first size of the absorbent material to be absorbed by the absorbing region. It is a manufacturing method of the absorptive article according to claim 1 ,
In the longitudinal direction, the length of the absorbent core of the absorbent article of the second size is 105% or less of the length of the absorbent core of the absorbent article of the first size. Manufacturing method of absorbent article. It is a manufacturing method of the absorptive article according to claim 1 or 2 ,
After the step d),
f) A part of the absorbent article sheet is cut off on both sides in the width direction perpendicular to the longitudinal direction at the center position of each of the plurality of absorbent cores , or the first of the plurality of absorbent articles. Further comprising a step of cutting out a part of one sheet or the second sheet to form a plurality of leg cutouts,
Formation of the leg cutout of the absorbent article of the second size is performed using a cutter used for forming the leg cutout of the absorbent article of the first size , the shape of the away leg cut of the absorbent article of the size, manufacturing method of an absorbent article, wherein the same der Rukoto said first size shape-away leg cut of the absorbent article. It is a manufacturing method of the absorptive article according to claim 1 or 2 ,
After the step d),
g) Positions of the respective centers of the plurality of absorbent cores by sandwiching the absorbent article sheet by a rotary die cutter that rotates about a rotation axis that is parallel to the absorbent article sheet being conveyed and perpendicular to the conveyance direction. Further comprising a step of cutting a part of the absorbent article sheet to form a plurality of leg cutouts on both sides in the width direction perpendicular to the longitudinal direction of
In forming the absorbent article of the second size smaller than when forming the ratio of the rotational speed of the rotary die cutter for conveyance speed of the absorbent article sheet of an absorbent article of the first size By doing so, the pitch in the longitudinal direction of the plurality of leg cutouts is made larger than the pitch of the plurality of leg cutouts in the absorbent article of the first size. Manufacturing method. It is a manufacturing method of the absorptive article according to claim 1 or 2,
After the step d),
h) By sandwiching the plurality of absorbent articles by a rotary die cutter that rotates around a rotation axis that is parallel to the plurality of absorbent articles to be conveyed and perpendicular to the conveyance direction, A step of cutting a part of the first sheet or the second sheet of the plurality of absorbent articles to form a plurality of leg cutouts on both sides of the position in the width direction perpendicular to the longitudinal direction. Prepared,
When forming the absorbent article of the second size, the ratio of the rotational speed of the rotary die cutter to the transport speed of the plurality of absorbent articles is smaller than when forming the absorbent article of the first size. By doing so, the pitch in the longitudinal direction of the plurality of leg cutouts is made larger than the pitch of the plurality of leg cutouts in the absorbent article of the first size. Manufacturing method.

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