Apparatus and method for manufacturing worn articles

Abstract

The apparatus comprises one anvil (65) having a plurality of protrusions (67) formed on the surface of a roll (66), a plurality of horns (61, 62, 63) that repeatedly contact the protrusions (67) via an elastic sheet (10) by ultrasonic vibration to fuse them, and a plurality of vibration devices (64) that ultrasonically vibrate each of the horns (61, 62, 63), with the tip of each horn (61, 62, 63) positioned opposite the one anvil (65), and the horns (61, 62, 63) positioned at different positions in the axial direction (S) of the roll (66) so that each horn (61, 62, 63) contacts a different protrusion (67) from the others.

Description

[Technical field]

[0001] The present invention relates to the manufacture of worn articles such as disposable diapers and pants. [Background technology]

[0002] Conventionally, a stretchable elastic sheet has been formed by sandwiching multiple thread-like elastic members between two sheets of nonwoven fabric (Patent Document 1). In this prior art, the elastic sheet is passed between an embossing roll on which multiple protrusions are formed and an opposing roll, and the elastic members are sandwiched together with the nonwoven fabric between the protrusions and the opposing roll and then cut. This forms alternating stretchable and non-stretchable regions in the elastic sheet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP2002-113042 A (Fig. 1) Summary of the Invention

[0004] In the above-mentioned prior art, in order to reliably cut the elastic member, a pressure mechanism is required to press one roll against the other roll. Furthermore, in order to prevent deformation of the rolls due to pressure, it is necessary to increase the diameter of the rolls or provide side rings, which results in a problem of an increase in the size of the entire apparatus. Furthermore, in order to ensure that the elastic member is cut, at least one of the rolls is heated.

[0005] SUMMARY OF THE PRESENT EMBODIMENT The object of the present invention is therefore to solve these problems.

[0006] This manufacturing equipment is A generating device that generates an elastic sheet in which a plurality of elastic members are sandwiched between a first sheet and a second sheet; a cutting device for melting and cutting a part of the elastic member of the elastic sheet by heat, One anvil having a plurality of protrusions formed on a surface of the roll; a plurality of horns that repeatedly come into contact with the protrusions via the elastic sheet by ultrasonic vibration to perform the melting; a plurality of vibration devices for ultrasonically vibrating each of the horns; The tip surface of each of the horns is disposed to face one of the anvils, and The horns are disposed at different positions in the axial direction of the roll such that at least a portion of each horn abuts on different convex portions among the plurality of convex portions. In addition, "at least a portion of each horn abuts different convex portions among the multiple convex portions" means that there are cases in which each horn abuts a different convex portion from the multiple convex portions, and cases in which parts of the multiple horns abut the same convex portion and the remaining parts of the multiple horns abut different convex portions from the multiple convex portions.

[0007] The manufacturing method using such a manufacturing apparatus is as follows: a generating step in which the manufacturing apparatus generates an elastic sheet by sandwiching a plurality of elastic members between a first sheet and a second sheet; and cutting the elastic member without melting the first and second sheets of the elastic sheets by ultrasonically vibrating the horns.

[0008] According to the present invention, the elastic member is cut by ultrasonic vibration. Therefore, the elastic member can be cut reliably. In addition, since the cutting is performed by ultrasonic vibration, the cut part of the elastic sheet is beautifully finished and inconspicuous. Furthermore, the cut part is less likely to be stiff, and has a good fit and feel.

[0009] In addition, there is no need to sharpen the tips of the projections of the roll, so the projections are less susceptible to wear, and there is no need to polish the projections. Furthermore, there is no need to heat the roll, and there is no need to supply electricity to the rotating members.

[0010] In addition, it is not necessary to apply a large force to the rolls, so a pressure mechanism is not required, and the diameter of the rolls can be made small, making it possible to reduce the size of the entire apparatus. Also, it is not necessary to provide side rings to the rolls.

[0011] By the way, when a single horn that is long in the axial direction of the roll contacts the protrusions of the roll, the contact of the horn with the roll is likely to become uneven due to a slight inclination of the horn with respect to the roll. In contrast, by arranging multiple horns in the axial direction of the roll, the pressing force of each horn against the roll in the axial direction becomes uniform, improving the reliability of cutting. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a plan view showing a worn article according to an embodiment of the present invention in an unfolded state. [Diagram 2] FIG. 2 is a plan view showing steps in a method for manufacturing the wearing article. [Diagram 3] FIG. 3A is a plan view of the cutting device, and FIG. 3B is a layout diagram showing the manufacturing device. [Figure 4] FIG. 4 is a schematic perspective view showing the anvil. [Diagram 5] FIG. 5 is a layout diagram showing the manufacturing equipment. [Figure 6] FIG. 6 is a schematic perspective view showing the anvil. [Figure 7] 7A and 7B are schematic plan views each showing an example of an arrangement pattern of horns. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Preferably, a tip surface of each of the horns extends in the axial direction of the roll so as to be aligned along at least one generatrix of the roll.

[0014] In this case, the axial pressing force of each horn against the roll will be uniform, and each horn will contact each protrusion of the corresponding roll with uniform force.

[0015] Preferably, adjacent horns among the plurality of horns are spaced apart from each other in the axial direction of the roll.

[0016] In this case, it is possible to prevent adjacent horns from interfering with each other.

[0017] Preferably, each of said horns is aligned along one of said generatrix lines of said roll.

[0018] In this case, the structure for supporting the horn and the vibration device will be simplified.

[0019] Preferably, the plurality of horns include one horn extending along one of the generatrix lines and another horn extending along another generatrix line spaced apart from the one generatrix line in the circumferential direction of the roll; The one horn and the other horn are arranged to overlap each other in the axial direction of the roll only at their respective ends, and are spaced apart from each other in the circumferential direction of the roll. Note that "overlapping each other only at their respective ends" excludes the case where the horns completely overlap each other in the axial direction, i.e., the horns overlap each other at their axial ends, but do not overlap each other the remainder (majority) of their axial lengths.

[0020] In this case, the multiple horns can be arranged with their cutting areas overlapping, thereby improving the reliability of cutting the elastic member to be cut.

[0021] Preferably, the plurality of horns include one horn extending along one of the generatrix lines and another horn extending along another generatrix line spaced apart from the one generatrix line in the circumferential direction of the roll; The one horn and the other horn are arranged spaced apart from each other in the circumferential direction of the roll, and are arranged without space between each other in the axial direction of the roll, and are arranged adjacent to each other in the axial direction of the roll. That is, the one horn and the other horn are spaced apart from each other in the circumferential direction of the roll, but are not spaced apart from each other in the axial direction of the roll, and are arranged adjacent to each other without overlapping each other. In this case, since the multiple horns are disposed adjacent to one another in the axial direction, the elastic member to be cut can be cut with increased certainty.

[0022] Preferably, a vacuum device is provided for adsorbing the elastic sheet onto the surface of the roll. By the way, when a plurality of horns come into contact with the elastic sheet, wrinkles are likely to occur in the elastic sheet. However, by cutting the elastic sheet while adsorbing it, the occurrence of wrinkles can be suppressed.

[0023] The features described and / or illustrated in connection with one of the above embodiments or examples below may be used in the same or similar manner in one or more other embodiments or examples and / or in combination with or instead of features of the other embodiments or examples. EXAMPLES

[0024] The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are merely for illustration and explanation, and should not be used to define the scope of the present invention. The scope of the present invention is defined only by the claims. In the accompanying drawings, the same part numbers in multiple drawings indicate the same or corresponding parts.

[0025] An example of the structure of a worn article 1 according to the present invention will now be described with reference to the drawings.

[0026] As shown in Fig. 1, the wearing article 1 has a symmetrical shape and structure, and includes an absorbent main body 2 and front and rear waist portions 3. The absorbent main body 2 has a waist portion covering the wearer's front torso and extending in the waist direction X, a waist portion covering the wearer's rear torso and extending in the waist direction X, and a crotch portion 22 covering the crotch area between the two waist portions.

[0027] The crotch portion 22 extends in a longitudinal direction Y perpendicular to the waist-circumference direction X. The absorbent main body 2 constitutes a part or the whole of the crotch portion 22.

[0028] As shown in Fig. 2, in the state of the finished wearing article 1, the crotch portion 22 is folded in two along a line parallel to the waist-circumference direction X. As a result, the ends E3 in the waist-circumference direction X of the front and rear waist portions in Fig. 1 overlap each other. When the wearing article is a pants-type article, the ends in the waist-circumference direction X of the front waist portion 3 and the rear waist portion 3 are welded to each other.

[0029] The absorbent body 2 in Fig. 1 is provided with an absorbent core (not shown). This absorbent core absorbs body fluids. The absorbent core is sandwiched between a top sheet and a back sheet. Each sheet and the absorbent core are laminated together.

[0030] The top sheet is made of a thin liquid-permeable nonwoven fabric and covers the skin side of the absorbent core. Cuffs (not shown) may be provided on the top sheet.

[0031] The back sheet covers the non-skin side of the absorbent core and is made of a liquid-impermeable resin sheet. The waist portions 3 are attached to the respective ends of the absorbent body 2 in the longitudinal direction Y.

[0032] Each waist portion 3 protrudes in the waist direction X from the absorbent main body 2. That is, the waist portion 3 protrudes in the waist direction X beyond the crotch portion 22 and extends in the waist direction X from both edges (ends in the waist direction) E2 of the absorbent main body 2.

[0033] Each waist portion 3 is provided with an elastic member 32 for fitting the wearing article 1 to the wearer. For example, a plurality of rubber threads, flat rubber, or a material containing a thermoplastic resin may be used as the elastic member 32. The elastic member 32 is deactivated (has no contractile force) in the portion overlapping with the absorbent main body 2. The elastic members 32 may extend in parallel to each other in the waist direction.

[0034] The absorbent main body 2 may be formed with leg openings (not shown) that are constricted along the legs of the wearer. The leg openings and the portion of the waistband 3 that is connected to the leg openings may be provided with another elastic member made of, for example, rubber thread, so as to fit along the legs of the wearer.

[0035] The absorbent body 2 is attached to the skin side of the waist portion 3 . In this specification, the term "skin side" refers to the side of the wearing article 1 that faces the wearer's skin when worn, and the term "non-skin side" refers to the side opposite to the skin side.

[0036] Next, the wearing article 1 will be described in further detail.

[0037] 1, each of the front and rear waistbands 3 is formed by sandwiching a plurality of elastic members 32 extending in the waistband direction X between first and second sheets 11, 12. The first and second sheets 11, 12 are, for example, nonwoven fabric sheet pieces, and are joined to each other by an adhesive or a welding structure to form an elastic sheet 10. This elastic sheet 10 forms folds (gathers) due to the contraction force of the elastic members 32.

[0038] Next, a manufacturing apparatus for the present wearing article will be described. 3A to 4 show the first embodiment.

[0039] As shown in FIG. 3B, the manufacturing apparatus includes a generating device 50, a cutting device 60, and an erecting device 70.

[0040] The forming device 50 has a pair of nip rolls 51, 52, and forms an elastic sheet 10 in which a plurality of elastic members 32 are sandwiched between a first sheet 11 and a second sheet 12 by the pair of nip rolls 51, 52. The first sheet 11, the second sheet 12, and the elastic members 32 that constitute the formed elastic sheet 10 are a continuous body that continues in the machine direction.

[0041] That is, in this example, a pair of sheets 11, 12 and an elastic member 32 are introduced into a pair of nip rolls 51, 52, and these are laminated to produce an elastic sheet 10. Note that adhesive may be applied to one of the sheets 11 (12) from an applicator 53. Alternatively, adhesive may not be applied to the sheets, and adhesive may be applied only to the elastic member 32, and then the elastic member 32 may be sandwiched between the pair of sheets 11, 12 to produce an elastic sheet.

[0042] The cutting device 60 includes a plurality of horns 61, 62, and 63 as shown in FIG. 3A, a vibration device 64 provided for each of the horns 61 to 63, and an anvil 65, and cuts a portion of the elastic member 32 of the elastic sheet 10 as shown in FIG. 3B by heat.

[0043] The anvil 65 has a plurality of protrusions 67 formed on the surface of a roll 66. The horns 61-63 are ultrasonically vibrated to repeatedly come into contact with the protrusions 67 via the elastic sheet 10, thereby performing the melting. The vibration devices 64 ultrasonically vibrate the horns 61-63.

[0044] 4 and 3A, a group of multiple protrusions 67 of the anvil 65 is provided on a part of the surface of the roll 66, and is provided in a predetermined region in the circumferential direction R and the axial direction S of the roll 66. The multiple protrusions 67 may be provided intermittently in the circumferential direction R and the axial direction S, or may be arranged in a staggered pattern. The number of groups of protrusions 67 provided on one roll 66 may be one or more.

[0045] 4, the tip surface 68 of each of the horns 61-63 is disposed to face the one anvil 65. Moreover, the horns 61-63 are disposed at different positions in the axial direction S of the roll 66 so that the horns 61-63 come into contact with different protrusions 67 among the plurality of protrusions 67.

[0046] 4, a tip surface 68 of each of the horns 61 to 63 extends in the axial direction S of the roll 66 so as to follow the generating line M of the roll 66. In this example, the horns 61 to 63 are arranged in a straight line along the single generating line M of the roll 66.

[0047] Among the plurality of horns 61 to 63 (FIG. 3A), the tip faces 68 of adjacent horns 61 to 63 (FIG. 3A) are disposed at a predetermined distance Δ from each other in the axial direction S of the roll 66, as shown in FIG. 4. This prevents interference between the horns.

[0048] Next, a method for manufacturing the wearing article 1 will be described.

[0049] As shown in FIG. 2, a plurality of continuous elastic members 32 extending in the conveying direction L are conveyed in the conveying direction L in a stretched state in the conveying direction L.

[0050] Nip rolls 51, 52 in Figure 3B sandwich the continuous elastic member 32 between two continuous first and second sheets (continuous nonwoven fabrics) 11, 12 having a pair of side edge portions 4E extending in the conveying direction L in Figure 2, and bond the first and second sheets 11, 12 with an adhesive so that they overlap each other to produce an elastic sheet 10. This joining may be by heat sealing (thermal welding) or by welding using ultrasonic energy.

[0051] 2, the elastic members 32 are cut and deactivated by the cutting device 60 in FIG. 3A at the portions overlapping the absorbent body 2. Hereinafter, the cutting of the elastic members 32 will be described in detail.

[0052] 3B, the elastic sheet 10 is introduced between the horns 61-63 and the anvil 65. When the anvil rotates to a position where the protrusions 67 of the anvil face the horns 61-63, the horns 61-63 come into contact with the protrusions 67 due to the ultrasonic vibrations of the horns 61-63, and the portions of the elastic sheet 10 sandwiched between the horns 61-63 and the protrusions 67 are heated.

[0053] On the other hand, the elastic member 32 has a lower softening point and melting point than the first and second sheets 11, 12, and also has a larger elongation during transportation. Therefore, only the elastic member 32 of the elastic sheet 10 is melted and cut in the predetermined region α in Fig. 2 by the temperature rise. That is, the horns 61 to 63 are ultrasonically vibrated to execute a process of cutting only the elastic member 32 without melting and cutting the first and second sheets 11, 12 of the elastic sheet 10.

[0054] 2, the elastic sheet 10 having the pair of side edge portions 4E is slit by a slitter (not shown) along the conveying direction L while being conveyed in the conveying direction L. As a result, the elastic sheet 10 becomes a pair of waistline elastic sheets 10 that become front and rear waistline portions. After the slitting, the two waistline elastic sheets 10 are moved relatively in the vertical direction Y perpendicular to the conveying direction L so as to be separated from each other in the vertical direction Y.

[0055] Thereafter, the pair of waist-circulating elastic sheets 10 are transported in the transport direction L generally parallel to each other, while the absorbent body 2 is arranged (installed) so that it spans the region α of the pair of waist-circulating elastic sheets 10 and overlaps partially with each of the waist-circulating elastic sheets 10, thereby producing a continuous laminate W1.

[0056] That is, the absorbent body 2 in Fig. 2 is intermittently and discontinuously introduced to a first combine roll 71 from a cut-out conveyor 73 of the installation device 70 in Fig. 3B. Meanwhile, the pair of divided elastic sheets 10 is introduced between both rolls 71, 72 via a second combine roll 72 of the installation device 70. In this way, the absorbent body 2 is installed on the elastic sheet 10 by both rolls 71, 72, and the continuous laminate W1 in Fig. 2 is produced.

[0057] Thereafter, the continuous laminate W1 is folded in two at the absorbent body 2 so that the pair of waist-circumference elastic sheets 10 overlap each other.

[0058] 2, the pair of waistline elastic sheets 10 are welded to each other at end portions E3 (FIG. 1) in the conveying direction L of the portions that will become the front and rear waistline portions 3, and at side seal portions. This weld-joining may be performed by welding using ultrasonic energy from an ultrasonic horn, or may be performed by heat sealing.

[0059] Thereafter, the continuous laminate W1 in Fig. 2 is cut into pieces of size (unit) for each individual wearing article 1 along imaginary cutting lines shown by dashed lines. That is, in order to produce the individual wearing articles 1 one after another, the continuous laminate W1 is cut one after another in the longitudinal direction Y between the absorbent bodies 2 adjacent to each other in the conveying direction L. In this way, pairs of waist-circumference elastic sheets 10 are cut one after another at positions that become the ends E3 of the wearing article 1 in the waist-circumference direction X (Fig. 1). In this way, individual pants-type wearing articles 1 are obtained.

[0060] 5 and 6 show Example 2. The worn article obtained in this second embodiment is similar to that in the first embodiment.

[0061] 6, the multiple horns 61 to 63 are arranged to overlap each other by Δs in the axial direction S of the roll 66. Meanwhile, the horns 61, 63 and the horn 62 are arranged to be spaced apart from each other in the circumferential direction R of the roll 66, as shown in FIG.

[0062] A vacuum device 80 may be provided to adsorb the elastic sheet 10 onto the surface of the roll 66. For example, the vacuum device 80 may be a device that adsorbs the elastic sheet 10 onto the surface of the roll 66 only within the angular range in which the horns 61 to 63 are provided.

[0063] In each embodiment, the anvil 65 does not essentially need to be heated, and therefore no power supply for heating the anvil 65 is provided.

[0064] 7A to 7D are schematic plan views each showing an example of an arrangement pattern of a plurality of horns, in which, in order to simplify the drawings and make them easier to understand, only the tip surface 68 of each horn is shown.

[0065] The example shown in Fig. 7A has the same arrangement as that of Example 1. In this example, adjacent horns in the axial direction S of the roll are arranged at a predetermined interval Δ. In addition, the horns are arranged in a straight line along a single generatrix M of the roll, and are not shifted from each other in the circumferential direction R of the roll.

[0066] 7B has the same arrangement as that of Example 2. In this example, the multiple horns include one horn (e.g., horns on both the left and right sides) extending along one generating line M, and another horn (e.g., a central horn) extending along another generating line M spaced apart from the one generating line M in the circumferential direction R. In other words, the one horn and the other horn are spaced apart from each other in the circumferential direction R. On the other hand, the end of the one horn and the end of the other horn are arranged to overlap each other by Δs in the axial direction S. In other words, the majority of the one horn including its central portion and the majority of the other horn including its central portion do not overlap each other in the axial direction S.

[0067] 7C, the plurality of horns includes the one horn and the other horn, that is, the one horn and the other horn are spaced apart from each other in the circumferential direction R, similar to the example of FIG. On the other hand, end 68E of one horn and end 68E of the other horn are arranged without any space between them in the axial direction S, and are arranged adjacent to each other in the axial direction S. In other words, the arrangement is such that only the middle horn of three horns lined up in a straight line with no gaps in the axial direction S is moved in the circumferential direction R.

[0068] In the example shown in Fig. 7D, the multiple horns include the one horn and the other horn, that is, the one horn and the other horn are spaced apart from each other in the circumferential direction R, similar to the example in Fig. 7B. On the other hand, the one horn and the other horn are disposed at a distance Δ from each other in the axial direction S. In FIG. 7D, the one horn and the other horn do not overlap each other in the circumferential direction R, but they may be disposed so as to overlap each other.

[0069] As described above, the preferred embodiment has been described with reference to the drawings. However, those skilled in the art will easily imagine various changes and modifications within the obvious scope upon reading this specification. For example, the wearing article may not have cuffs, etc. Furthermore, the tension of the elastic members may be nullified in areas of the waistband member other than the area that is wrapped around the absorbent main body. The vacuum device may be provided on the anvil of the first embodiment. Furthermore, the slitting of the elastic sheet 10 and the separation of the pair of elastic sheets 10 in the longitudinal direction Y may be performed before the cutting device 60 cuts the elastic members 32 . Therefore, such changes and modifications are intended to be within the scope of the present invention as defined by the claims. [Industrial Applicability]

[0070] The present invention is applicable to wearing articles such as disposable diapers and pants. [Explanation of symbols]

[0071] 1: Wearing article 10: Elastic sheet 11: First sheet 12: Second sheet 2: Absorbent body 22: Crotch area 3: waist area 32: elastic member 4E: Side edge 50: Generator 51, 52: Nip rolls 53: Coater 60: Cutting device 61, 62, 63: Horn 64: Vibration device 65: Anvil 66: Roll 67: Convex portion 68: Tip surface 70: Installation device 71: First combine roll 72: Second combine roll 73: Cutting conveyor 80: Vacuum device E2,E3: End M: Bus bar L: conveying direction R: circumferential direction S: axial direction X: waist direction Y: longitudinal direction W: Continuous laminate α: area

Claims

1. A manufacturing apparatus for a worn article, comprising: a generating device for generating an elastic sheet as a waistband member in which a plurality of thread-like elastic members stretched in a conveying direction, which is a waistband direction, are sandwiched between a first sheet and a second sheet; a cutting device for melting and cutting a part of the elastic member of the elastic sheet by heat, One anvil having a plurality of protrusions formed on a surface of the roll; a plurality of horns that repeatedly come into contact with the protrusions via the elastic sheet by ultrasonic vibration to perform the melting; a plurality of vibration devices for ultrasonically vibrating each of the horns; The tip surface of each of the horns is disposed to face one of the anvils, and the horns are disposed at different positions in the axial direction of the roll such that at least a portion of each horn contacts a different one of the plurality of protrusions; the group of the plurality of protrusions is provided on a part of the surface of the roll, and is provided in a predetermined region in the circumferential direction and the axial direction of the roll, the plurality of protrusions are provided intermittently and in a staggered pattern in the circumferential direction and the axial direction, The cutting device melts and cuts a part of the elastic member of the elastic sheet at a portion where the elastic sheet and the absorbent body overlap, thereby nullifying the tension of the elastic member, the absorbent body is intermittently and discontinuously introduced from a cut-out conveyor of a laying device included in the manufacturing apparatus into a region of the elastic sheet where a part of the elastic member is melted by contact between the group of the plurality of protrusions and the plurality of horns, A manufacturing apparatus characterized in that the multiple horns are arranged at different positions in the axial direction of the roll with respect to the area of ​​the elastic sheet where only the elastic member is melt-cut and the absorbent body is installed.

2. 2. The manufacturing apparatus according to claim 1, wherein a tip surface of each of the horns extends in an axial direction of the roll so as to follow at least one generatrix of the roll.

3. 3. The manufacturing apparatus according to claim 2, wherein adjacent horns among the plurality of horns are arranged spaced apart from each other in the axial direction of the roll.

4. 4. The apparatus of claim 3, wherein each of said horns is aligned along one of said generatrix of said roll.

5. According to claim 2, the plurality of horns include one horn extending along one of the generating lines and another horn extending along another generating line spaced from the one generating line in the circumferential direction of the roll, A manufacturing apparatus, wherein the one horn and the other horn are arranged to wrap around each other in the axial direction of the roll only at their respective ends and are spaced apart from each other in the circumferential direction of the roll.

6. According to claim 2, the plurality of horns include one horn extending along one of the generating lines and another horn extending along another generating line spaced from the one generating line in the circumferential direction of the roll, A manufacturing apparatus in which the one horn and the other horn are arranged spaced apart from each other in the circumferential direction of the roll, are arranged without space between each other in the axial direction of the roll, and are arranged adjacent to each other in the axial direction of the roll.

7. 7. The manufacturing apparatus according to claim 1, further comprising a vacuum device that adsorbs the elastic sheet onto the surface of the roll.

8. 2. A method for manufacturing a wearing article using the manufacturing apparatus of claim 1, wherein the elastic member has a lower softening point and a lower melting point than the first and second sheets, conveying the elastic sheet in a state in which the elastic member has a greater elongation than the first and second sheets; a generating step in which a manufacturing device generates an elastic sheet by sandwiching a plurality of elastic yarns extending parallel to each other in an elongation direction between a first sheet and a second sheet; a step of cutting the elastic sheet by fusing only a portion of the elastic yarn of the elastic sheet without fusing the first and second sheets of the elastic sheet by ultrasonic vibration of the horns arranged at different positions in the axial direction of the roll; and a step of fusing and cutting the elastic sheet by fusing a portion of the elastic yarn of the elastic sheet at a portion where the elastic sheet and the absorbent body overlap, thereby neutralizing the tension of the elastic yarn. In the cutting step, a region in which the tension of the elastic yarn is nullified is intermittently formed, and a positioning step of positioning the absorbent body in an area where the tension of the elastic thread is nullified.

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