Disposable wearing article and manufacturing method thereof

Abstract

To provide a disposable wearing article that can be fractured along a fracture guiding line reliably.SOLUTION: A disposable wearing article includes: a front body part 12; a back body part 14; a crotch part 16 joined to the front body part 12 and the back body part 14; a pair of first junctions 20a and 20b for joining both end parts 12a, 12b and 14a, 14b of the front body part 12 and the back body part 14 together; a pair of flap members 18a and 18b disposed along one side principal surface 12s of the front body part 12, which are refastenable to the one side principal surface 12s of the front body part 12; a pair of second junctions 22a and 22b for joining the flap members 18a and 18b and the front body part 12 together; and a pair of fracture guide lines 24a and 24b formed on the front body part 12. The tearing strength of the fracture guide lines 24a and 24b is weaker than the tearing strength of the front body part 12 of a part where the fracture guide lines 24a and 24b are not formed, and weaker than the tearing strength of the second junctions 22a and 22b.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a disposable wearing article and a manufacturing method thereof, and more particularly to a pants-type disposable wearing article which can be torn and then refastened to wear, and a manufacturing method thereof. [Background technology]

[0002] A pants-type disposable wearing article that can be torn and then refastened to be worn has been proposed in the past. Fig. 12 is an elevational view of such a disposable wearing article.

[0003] 12, in this pants-type disposable wearing article 150, both ends of a front body 152 and a back body 157 are joined to each other at a joining portion 162, and both ends of a crotch portion 160 are attached to the front body 152 and the back body 157. A pair of break guide lines 132, 134 are formed at both ends of the front body 152, extending from a waist opening 165 to leg openings 164, and a pair of flap members 166, 168 are attached so as to straddle the respective break guide lines 132, 134.

[0004] The base end 143 of the flap members 166, 168 is joined to the front body 152, and a fastening element is provided at the tip 149, so that the fastening element at the tip 149 can be attached to and detached from the fastening area 140 of the front body 152 (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] US Patent Application Publication No. 2002 / 0148557 Summary of the Invention [Problem to be solved by the invention]

[0006] Such a disposable wearing article 150 may be worn by tearing the front body 152 along the break guide lines 132, 134 before wearing, wrapping the front body 152 around the wearer's legs, refastening the flap members 166, 168, and placing the wearer's legs through the leg openings 164. When wearing the disposable wearing article 150 in this manner, it is necessary to tear the front body 152 reliably along the break guide lines 132, 134.

[0007] In view of the above circumstances, an object of the present invention is to provide a disposable wearing article which can be reliably torn along a breaking guide line. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a disposable wearing article having the following configuration.

[0009] The disposable wearing article has (a) a front body that is placed on the wearer's stomach when worn, (b) a back body that is placed on the wearer's back when worn, (c) a crotch section connected to the front body and the rear body, (d) a pair of first joining sections that join both end portions of the front body and the rear body to each other, and (e) a first portion and a second portion, the second portions being opposed to each other and disposed along one main surface of the front body opposite the rear body so that the first portion is adjacent to one of the both end portions of the front body, and the second portion is disposed along one main surface of the front body opposite the rear body. (f) a pair of second joints joining the first portion of each of the flap members and the front body to each other; and (g) a pair of break guide wires formed on the front body extending between the upper and lower edges of the front body and passing between the second joints and the fastening portions of each of the flap members, wherein (i) the tear strength of the break guide wires is weaker than the tear strength of the front body in a portion where the break guide wires are not formed and is weaker than the tear strength of the second joints.

[0010] According to the above configuration, the break guide line is more easily torn than the second joint, so when the portion of the front body between the pair of break guide lines and one of the flap members are pulled in a direction away from each other, the front body can be reliably torn along the break guide line without the flap member peeling off from the front body.

[0011] Preferably, the tear strength of the breakage-inducing wire is weaker than the tear strength of the first joint portion.

[0012] In this case, since the break induction lines are more easily torn than the first joint, when the portion of the front body between the pair of break induction lines and the back body are pulled away from each other, the front body can be reliably torn along the break induction lines without the front body and the back body peeling apart at the first joint.

[0013] Preferably, the first joint portion and the second joint portion overlap each other when viewed from a direction perpendicular to the one main surface of the front body.

[0014] In this case, the first and second joining sections can be formed simultaneously, which simplifies the manufacturing process of the disposable wearing article.

[0015] Preferably, the break induction line is a perforation having a plurality of through portions passing between the one main surface and the other main surface of the front body.

[0016] In this case, the breakage induction wire can be easily formed.

[0017] Preferably, the fastening portion is a hook member of a hook and loop fastener.

[0018] In this case, the hook member can be easily attached to and detached from the front body, and the fastening remains stable even when the garment is repeatedly attached and detached.

[0019] In order to solve the above problems, the present invention provides a method for producing a disposable wearing article having the following configuration.

[0020] The method for manufacturing a disposable wearing article includes: (i) a first step of forming a main body continuum in which portions to be individual pieces, including a front body having first and second break guide lines formed therein, a back body, and a crotch portion joined to the front body and the back body, are connected, and the main body continuum is transported in a state in which a front body continuous portion to which the portions to be the front body are connected and a back body continuous portion to which the portions to be the back body are connected are separated from each other; (ii) a second step of joining a base material continuous body for forming first and second flap members and a hook continuous body for forming hook members to each other while transporting the base material continuous body and cutting the base material continuous body and hook members into a predetermined shape to form the first and second flap members, each of which has the hook member; and (iii) a third step of overlapping the first and second flap members on one main surface of the front body continuous body, and joining the first and second flap members to the front body continuous body of the main body continuum to each other to form a second joining portion. (iv) a fourth step of overlapping the back body continuous portion on the other main surface of the front body continuous portion of the main body continuous body and joining the front body continuous portion and the back body continuous portion of the main body continuous body to each other to form a first joint; and (v) a fifth step of cutting the main body continuous body so that a pair of the first joints join both end portions of the front body and the back body to each other and a pair of the second joints join the front body to the first and second flap members to each other to form the individual pieces, wherein (a) in the first step, the first and second break guiding wires are formed so that the tear strength of the first and second break guiding wires is weaker than the tear strength of the front body continuous portion in a portion where the first and second break guiding wires are not formed, and (b) in the third step, the second joint is formed so that the tear strength of the first and second break guiding wires is weaker than the tear strength of the second joint.

[0021] In this case, a disposable wearing article can be manufactured that can be reliably torn along the break guide line.

[0022] Preferably, the first joint portion is formed so that the tear strength of the first and second breakage guiding wires is weaker than the tear strength of the first joint portion.

[0023] In this case, a disposable wearing article can be manufactured in which the front body portion can be reliably torn apart along the break guide line without the front body portion and the back body portion being separated from each other at the first joint portion.

[0024] Preferably, (a) adhesive is applied to the front body continuous portion of the main body continuum, the base material continuous portion, or the first and second flap members so that when the first and second flap members are overlapped on the one main surface of the front body continuous portion of the main body continuum, an adhesive application portion is positioned between the first and second flap members and the front body continuous portion of the main body continuum, thereby forming the adhesive application portion, and (b) in the third step, the first and second flap members are overlapped on the one main surface of the front body continuous portion of the main body continuum via the adhesive application portion and temporarily fixed to form the second joint.

[0025] In this case, by temporarily fixing the first and second flap members, the conveying speed of the production line can be made faster than in a case where the adhesive-coated portion is not formed, making it easier to increase the number of products produced per unit time.

[0026] In order to solve the above problems, the present invention provides a method for producing a disposable wearing article having the following configuration.

[0027] The method for manufacturing a disposable wearing article includes: (i) a first step of forming a main body continuum in which portions to be individual pieces, including a front body having first and second break guide lines formed therein, a back body, and a crotch portion joined to the front body and the back body, are connected, and the main body continuum is transported in a state in which a front body continuous portion to which the portions to be the front body are connected and a back body continuous portion to which the portions to be the back body are connected are separated from each other; (ii) a second step of joining a base material continuous body for forming first and second flap members and a hook continuous body for forming hook members to each other while transporting and cutting them into a predetermined shape to form a divided front flap member in which the first and second flap members, each having the hook member, are connected; and (iii) a second step of overlapping the divided front flap member with one main surface of the front body continuous portion of the main body continuum and the back body continuous portion of the main body continuum with the other main surface of the front body continuous portion of the main body continuum, and cutting the divided front flap member and the main body continuum into the divided front flap member and the front body continuous portion. a third step of joining the front body continuous portion and the rear body continuous portion to each other to form a first joining portion that joins the front body continuous portion and the rear body continuous portion of the main body continuous body to each other and a second joining portion that joins the divided front flap member and the front body continuous portion of the main body continuous body to each other; and (iv) a pair of the first joining portions join both ends of the front body and the rear body to each other, and a pair of the second joining portions are joined to each other to form the individual pieces that join the front body and the flap member to each other. and a fourth step of cutting the pre-divided flap member and the main body continuous body, wherein (a) in the first step, the first and second break guiding wires are formed so that the tear strength of the first and second break guiding wires is weaker than the tear strength of the front body continuous portion in a portion where the first and second break guiding wires are not formed, and (b) in the third step, the second joint is formed so that the tear strength of the first and second break guiding wires is weaker than the tear strength of the second joint.

[0028] In this case, a disposable wearing article that can be reliably torn along the break guide line can be manufactured. The first joint portion that joins the front body and the back body to each other and the second joint portion that joins the front body and the flap member to each other can be formed simultaneously, thereby simplifying the manufacturing process.

[0029] Preferably, the first joint portion is formed so that the tear strength of the first and second breakage guiding wires is weaker than the tear strength of the first joint portion.

[0030] In this case, a disposable wearing article can be manufactured in which the front body portion can be reliably torn apart along the break guide line without the front body portion and the back body portion being separated from each other at the first joint portion.

[0031] Preferably, (a) adhesive is applied to the front body continuous portion of the main body continuum, the base material continuous portion, or the front flap member to form an adhesive application portion so that when the front flap member is overlapped on the one main surface of the front body continuous portion of the main body continuum, an adhesive application portion is positioned between the front flap member and the front body continuous portion of the main body continuum, and (b) in the third step, the front flap member is overlapped on the one main surface of the front body continuous portion of the main body continuum via the adhesive application portion and temporarily fixed to form the first joint and the second joint.

[0032] In this case, by temporarily fixing the pre-division flap member, the conveying speed of the production line can be made faster than in the case where the adhesive application portion is not formed, making it easier to increase the number of products produced per unit time.

[0033] Preferably, in the second step, the base material continuous web and the hook continuous web are transported, the hook continuous web is divided to form first and second hook continuous webs, the first and second hook continuous webs are cut to form the pairs of hook members, the pairs of hook members are joined to the base material continuous web at intervals in the transport direction to form the hook continuous web, and the hook continuous web is cut between adjacent pairs of hook members to form the pre-split flap members.

[0034] In this case, the first and second hook continuous bodies and the substrate continuous body can be efficiently cut using separate devices, which makes it easy to improve production efficiency. In addition, wear on the cutting blades used for cutting can be suppressed, allowing for efficient operation of the production line. Effect of the Invention

[0035] According to the present invention, a disposable wearing article that can be reliably torn along a break induction line can be provided. [Brief description of the drawings]

[0036] [Figure 1] Fig. 1(a) is a schematic front view of a disposable wearing article, and Fig. 1(b) is a schematic back view of the disposable wearing article. [Diagram 2] Fig. 2 is a schematic cross-sectional view taken along line AA in Fig. 1(a). [Diagram 3] FIG. 3 is a perspective view of a main part of the wearing article (Example 1). [Figure 4] FIG. 4 is a schematic diagram of a manufacturing process of a disposable wearing article (Example 1). [Diagram 5] Fig. 5(a) is a schematic front view of the disposable wearing article, and Fig. 5(b) is a schematic back view of the disposable wearing article. [Figure 6] FIG. 6 is a schematic diagram of a manufacturing process of a disposable wearing article (Example 2). [Figure 7] Fig. 7 is a schematic cross-sectional view taken along line BB in Fig. 5(a). [Figure 8] FIG. 8 is an enlarged schematic view of a main part of a disposable wearing article (modification 1). [Figure 9] FIG. 9 is a schematic diagram of a manufacturing process of a disposable wearing article (Modification 2). [Figure 10] FIG. 10 is a schematic diagram of a manufacturing process of a disposable wearing article (Modification 2). [Figure 11] FIG. 11 is a schematic diagram of a manufacturing process of a disposable wearing article (Modification 3). [Figure 12] FIG. 12 is an elevational view of a disposable wearing article (conventional example 1). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0038] Example 1 A disposable wearing article 10 of Example 1 and a method for manufacturing the same will be described with reference to Figs.

[0039] Fig. 1(a) is a schematic front view of a disposable wearing article 10 of Example 1, and Fig. 1(b) is a schematic back view. Fig. 2 is a schematic cross-sectional view taken along line AA in Fig. 1(a). Fig. 3 is a perspective view of a main part of the wearing article 10.

[0040] As shown in Figures 1(a), 1(b), 2 and 3, the disposable wearing article 10 has both ends 12a, 12b; 14a, 14b of a front body 12 and a back body 14 joined to each other via a pair of first joining portions 20a, 20b, both ends of a crotch portion 16 are connected to the front body 12 and the back body 14, and the crotch portion 16 is folded back at an intermediate position 17.

[0041] The front body 12 and the back body 14 may be made non-stretchable, but may be made stretchable by using, for example, a stretch composite sheet in which an elastic member is disposed between nonwoven fabric sheets and the nonwoven fabric sheets and the elastic member are bonded to each other at appropriate locations. The disposable wearing article 10 is packaged in the state shown in Figures 1(a) and 1(b) or further folded, and is provided to a consumer.

[0042] The front body 12 is placed on the wearer's abdomen when worn, and the back body 14 is placed on the wearer's back when worn. When a space is provided between the front body 12 and the back body 14, a waist opening is formed along the upper edge 12p of the front body 12 and the upper edge 14p of the back body 14, and a pair of leg openings are formed on both sides of the crotch portion 16.

[0043] The first joints 20a, 20b are formed by intermittently heat-sealing the front body 12 and the back body 14, for example as shown in Figure 3, and multiple heat-sealed portions 20s extending diagonally relative to the upper edge 12p and lower edge 12q of the front body 12 are arranged at intervals from each other.

[0044] A pair of break induction wires 24a, 24b are formed in the front body 12 with a gap between them and the first joint portions 20a, 20b, and a pair of flap members 18a, 18b are arranged to straddle the break induction wires 24a, 24b.

[0045] The pair of flap members 18a, 18b have a first portion 18p on the base end side and a second portion 18q on the tip end side, and the second portions 18q are arranged to face each other, and the first portion 18p and the front body 12 are joined to each other via second joints 22a, 22b. The second joints 22a, 22b are formed by heat sealing, ultrasonic bonding, or the like so as to extend continuously between the adjacent first joints 20a, 20b and the breakage guide lines 24a, 24b, as shown in Fig. 3, for example.

[0046] The second portion 18q of the flap members 18a, 18b has a fastening portion configured to be releasably fastened to one main surface 12s of the front body 12. For example, the fastening portion is hook members 19a, 19b of a hook-and-loop fastener attached to the second portion 18q of the flap members 18a, 18b so as to face one main surface 12s of the front body 12, and is configured to be releasably fastened to one main surface 12s of the front body 12 by engaging the hook surfaces 19s of the hook members 19a, 19b with one main surface 12s of the front body 12. The fastening portion may be configured using an adhesive sheet, a hook, a button, or the like.

[0047] The pair of breakage guide wires 24a, 24b extend between the upper edge 12p and the lower edge 12q of the front body 12, and are formed so as to pass between the second joint portions 22a, 22b of the flap members 18a, 18b and the hook members 19a, 19b.

[0048] The break induction lines 24a, 24b are formed so that the tear strength of the break induction lines 24a, 24b is weaker than the tear strength of the front body 12 in the portion where the break induction lines 24a, 24b are not formed. As a result, when both sides of the break induction lines 24a, 24b of the front body 12 are pulled in opposite directions, the front body 12 is torn along the break induction lines 24a, 24b, but is not torn in the portion where the break induction lines 24a, 24b are not formed.

[0049] 3, the break induction lines 24a, 24b are perforations having a plurality of through portions 24s that penetrate between one main surface 12s and the other main surface 12t of the front body 12. The break induction lines 24a, 24b of the perforations can be easily formed, but the break induction lines 24a, 24b may also be formed by forming non-through slits in the front body 12, removing a portion of the material of the front body 12, or the like.

[0050] The break induction wires 24a, 24b and the second joints 22a, 22b are formed so that the tear strength of the break induction wires 24a, 24b is weaker than the tear strength of the second joints 22a, 22b. This allows the front body 12 to be reliably torn along the break induction wires 24a, 24b when the portion of the front body 12 between the pair of break induction wires 24a, 24b and one of the flap members 18a, 18b are pulled in directions away from each other, without the flap members 18a, 18b peeling off from the front body 12.

[0051] Furthermore, it is preferable that the break induction wires 24a, 24b and the first joints 20a, 20b are formed so that the tear strength of the break induction wires 24a, 24b is weaker than the tear strength of the first joints 20a, 20b that join the front body 12 and the back body 14. This allows the front body 12 to be reliably torn along the break induction wires 24a, 24b when the portion of the front body 12 between the pair of break induction wires 24a, 24b and the back body 14 are pulled in directions away from each other, without the front body 12 and the back body 14 peeling away from each other at the first joints 20a, 20b.

[0052] That is, let the tearing strength of the rupture-inducing lines 24a and 24b be F f , the tearing strength of the area before the formation of the rupture-inducing lines 24a and 24b be F0, and the tearing strength of the first joints 20a and 20b be F 1、 Let the tearing strength of the second joints 22a and 22b be F2. Then, it is configured to satisfy the following equations (1) and (2), and preferably, it is further configured to satisfy equation (3). F f < F0 (Equation 1) F f < F2 (Equation 2) F f < F1 (Equation 3)

[0053] The tearing strength is measured in accordance with JIS L 1096 C method (trapezoid method).

[0054] To measure the tearing strength of the rupture-inducing lines 24a and 24b, a sample of the precursor 12 with a predetermined size is prepared such that the rupture-inducing lines 24a and 24b are located at the center in the longitudinal direction of the sample. The rupture-inducing lines 24a and 24b are arranged between the fixed-side gripper and the moving-side gripper of the testing apparatus, and a tearing test is performed under predetermined conditions (predetermined gripper interval, predetermined tensile speed). The maximum strength [Kgf (N)] shown when tearing is measured and represented by the average value of three measurements.

[0055] For example, if the width of the blade forming the perforations is W (mm) and the gap dimension between adjacent perforations is D (mm), the tearing strength of the rupture-inducing lines 24a and 24b is as shown in Table 1 below.

Table 1

[0056] To measure the tearing strength of the area before the formation of the rupture-inducing lines 24a and 24b, a sample of the precursor 12 with a predetermined size that does not include the rupture-inducing lines 24a and 24b is prepared. The sample is gripped between the fixed-side gripper and the moving-side gripper of the testing apparatus, and a tearing test is performed under predetermined conditions. The maximum strength shown when tearing is measured and represented by the average value of three measurements.

[0057] The tear strength of the first joints 20a, 20b is measured by creating a sample of specified dimensions in which the first joints 20a, 20b are located in the longitudinal center of the sample, with the front body 12 and the back body 14 arranged on either side of it, and placing the first joints 20a, 20b between the fixed grip and moving grip of the testing equipment, with one of the fixed grip and the moving grip gripping the front body 12 of the sample, and the other gripping the back body 14 of the sample, and conducting a tear test under specified conditions. The maximum strength shown when torn is measured and expressed as the average of three measurements.

[0058] The tear strength of the second joints 22a, 22b is measured by creating a sample of specified dimensions in which the second joints 22a, 22b are located in the longitudinal center of the sample, with the front body 12 and flap members 18a, 18b arranged on either side of it, and placing the second joints 22a, 22b between the fixed grip and moving grip of the testing equipment, with one of the fixed grip and the moving grip gripping the front body 12 of the sample, and the other gripping the flap members 18a, 18b of the sample. A tear test is performed under specified conditions, and the maximum strength shown when torn is measured and expressed as the average of three measurements.

[0059] For example, if the seal width of the heat-sealed portion 20s shown in FIG. 3 is W (mm), the tear strength of the first joint portions 20a and 20b will be as shown in Table 2 below. [Table 2]

[0060] Next, a method for manufacturing the disposable wearing article 10 will be described with reference to Fig. 4. The figure is a schematic diagram of the manufacturing process of the disposable wearing article 10.

[0061] The method for manufacturing the disposable wearing article 10 includes the following first to fifth steps.

[0062] (i) A main body continuum 11 is formed in which a portion 11k to be an individual piece including the front body 12 on which the first and second breakage guiding wires 24a, 24b are formed, the back body 14, and the crotch section 16 joined to the front body 12 and the back body 14 is connected, and the main body continuum 11 is transported in a state in which the front body continuous portion 12k to which the portion to be the front body 12 is connected and the back body continuous portion 14k to which the portion to be the back body 14 is connected are separated from each other. This is the first process.

[0063] The main body continuous body 11 can be formed by a known method, for example, the front body continuous part 12k and the back body continuous part 14k have a plurality of elastic members 12i, 14i arranged between sheets of nonwoven fabric or the like, the sheets of nonwoven fabric or the like and the elastic members 12i, 14i are joined to each other at appropriate locations, and the elastic members 12i, 14i are transported in a stretched state. An absorbent 18 for absorbing and retaining liquids such as menstrual blood and / or urine may or may not be arranged in advance on the main body continuous body 11.

[0064] (ii) Furthermore, the continuous base material strip 30 for forming the first and second flap members 18a, 18b and the continuous hook strips 32, 34 for forming the hook members 19a, 19b are joined to each other while being conveyed and cut into a predetermined shape to form the first and second flap members 18a, 18b having the hook members 19a, 19b, respectively. This is the second process.

[0065] The first and second flap members 18a, 18b can be formed in a variety of ways.

[0066] For example, the continuous base material strip 30 and the first and second continuous hook strips 32, 34 for forming the first and second hook members 19a, 19b of the hook-and-loop fastener are transported in the directions in which they continue.

[0067] Next, the first and second hook continuous bodies 32, 34 are joined to the continuous substrate body 30 at intervals along a pair of side edges 30m, 30n of the continuous substrate body 30 to form the first continuous substrate body 30a. At this time, the first and second hook continuous bodies 32, 34 are joined to the continuous substrate body 30 by an appropriate means such as adhesive, heat sealing, ultrasonic bonding, sewing, etc., so that the hook surfaces are exposed.

[0068] Next, the first continuous body 30a is cut along a pair of side edges 30m, 30n of the base material continuous body 30 to form trimming portions 30p, 30q of a predetermined shape shown by dashed lines, thereby forming a second continuous body 30b having hook members 19a, 19b formed by cutting the first and second hook continuous bodies 32, 34.

[0069] Next, the second continuous body 30b is divided between the mutually opposing hook members 19a, 19b to form a pair of third continuous bodies 31a, 31b having outer edges 31m, 31n formed by the division.

[0070] Next, the pair of third continuous bodies 31a, 31b are cut at a predetermined position 31x indicated by a dotted line to form first and second flap members 18a, 18b having hook members 19a, 19b, and after the first and second flap members 18a, 18b are paired, their orientation relative to the conveying direction is changed as indicated by arrow 31u.

[0071] The first and second flap members 18a, 18b may be formed so that there is no need to change the orientation with respect to the conveying direction, as in Modification 2 described later.

[0072] (iii) Next, the first and second flap members 18a, 18b are overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11, and the first and second flap members 18a, 18b and the front body continuous portion 12k of the main body continuum 11 are joined to each other to form second joining portions 22a, 22b. This is the third step.

[0073] At this time, either one of the first and second breakage guiding wires 24a, 24b is disposed between the second joints 22a, 22b of the pair of flap members 18a, 18b and the hook members 19a, 19b, so that the flap members 18a, 18b straddle either one of the first and second breakage guiding wires 24a, 24b. The second joints 22a, 22b are formed by heat sealing, ultrasonic bonding, or the like.

[0074] (iv) Next, as shown by the arrow 11x, the main body continuum 11 is folded back, the back body continuous portion 14k of the main body continuum 11 is overlapped on the other main surface 12t of the front body continuous portion 12k of the main body continuum 11, and the front body continuous portion 12k and the back body continuous portion 14k of the main body continuum 11 are joined to each other to form first joining portions 20a, 20b. This is the fourth step.

[0075] The first joints 20a, 20b are formed by heat sealing, ultrasonic bonding, or the like on both sides of the boundary line of the portion 11k of the main body continuum 11 that is to become an individual piece. The front body continuous portion 12k and the back body continuous portion 14k may be bonded to each other so that the first joints 20a, 20b are connected and straddle the boundary line of the portion 11k that is to become an individual piece.

[0076] (v) Next, the main body continuous body 11 is cut so that the pair of first joint portions 20a, 20b join both ends 12a, 12b; 14a, 14b of the front body 12 and the back body 14 to each other, and the pair of second joint portions 22a, 22b join the front body 12 to the first and second flap members 18a, 18b to each other to form the individual pieces. This is the fifth step.

[0077] In the first step (i) above, the first and second break induction wires 24a, 24b are formed so that the tear strength of the first and second break induction wires 24a, 24b is weaker than the tear strength of the front body continuous portion 12k in the portion where the first and second break induction wires 24a, 24b are not formed.

[0078] In the third step (iii) above, the second joints 22a, 22b are formed so that the tear strength of the first and second breakage guiding wires 24a, 24b is weaker than the tear strength of the second joints 22a, 22b.

[0079] In this manner, the disposable wearing articles 10 that can be reliably torn along the breakage guide lines 24a, 24b can be continuously and efficiently manufactured.

[0080] In addition, the elastic members 12i, 14i of the front body continuous portion 12k and the back body continuous portion 14k are released from their stretched state by being cut, so that the front body 12 and the back body 14 of the wearing article 10 are in a contracted state after cutting.

[0081] In the fourth step (iv) above, the first joints 20a, 20b may be formed so that the tear strength of the first and second breakage guiding wires 24a, 24b is weaker than the tear strength of the first joints 20a, 20b.

[0082] In this case, a disposable wearing article 10 can be manufactured in which the front body 12 can be reliably torn along the breakage guide lines 24a, 24b without the front body 12 and the back body 14 being separated at the first joint portions 20a, 20b.

[0083] In the third step (iii) above, the first and second flap members 18a, 18b may be overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuous body 11 and temporarily fixed thereto.

[0084] In this case, (a) adhesive is applied to the front body continuous portion 12k of the main body continuum 11, the base material continuum 30, or the first and second flap members 18a, 18b so that when the first and second flap members 18a, 18b are overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11, the adhesive application portions 36a, 36b are positioned between the first and second flap members 18a, 18b and the front body continuous portion 12k of the main body continuum 11, thereby forming the adhesive application portions 36a, 36b, and (b) in the third step, the first and second flap members 18a, 18b are overlapped and temporarily fixed on one main surface 12s of the front body continuous portion 12k of the main body continuum 11 via the adhesive application portions 36a, 36b, thereby forming the second joint portions 22a, 22b.

[0085] For example, as shown in FIG. 4, an adhesive such as hot melt is applied along outer edges 31m, 31n to the main surface of a pair of third continuous bodies 31a, 31b on the same side as the first and second hook members 19a, 19b to form adhesive-applied portions 36a, 36b, and the first and second flap members 18a, 18b are overlapped and temporarily fixed on one main surface 12s of the front body continuous portion 12k of the main body continuous body 11 so that break induction lines 24a, 24b are positioned between the adhesive-applied portions 36a, 36b and the hook members 19a, 19b.

[0086] Instead of the pair of third continuous bodies 31a, 31b, adhesive application portions 36a, 36b may be formed by applying an adhesive such as hot melt to appropriate locations of the front body continuous portion 12k of the main body continuous body 11, the base material continuous body 30, the first continuous portion 30a, the second continuous portion 30b, or the pair of cut flap members 18a, 18b.

[0087] By temporarily fixing the first and second flap members 18a, 18b, the conveying speed of the production line can be increased compared to a case where the first and second flap members 18a, 18b are not temporarily fixed, and it is easy to increase the number of products produced per unit time.

[0088] Example 2 A disposable wearing article 10a according to Example 2 in which the first joining portions 20p, 20q and the second joining portions 22p, 22q overlap each other when viewed from a direction perpendicular to the main surface 12s of the front body 12, and a method for manufacturing the same will be described with reference to Figs. 5 to 7. Example 2 has substantially the same configuration as Example 1, and in the following, the same components as in Example 1 are designated by the same reference numerals as in Example 1, and differences from Example 1 will be mainly described.

[0089] Fig. 5(a) is a schematic front view of a disposable wearing article 10a of Example 2, and Fig. 5(b) is a schematic back view thereof Fig. 7 is a schematic cross-sectional view taken along line BB in Fig. 5(a).

[0090] As shown in Figures 5(a), 5(b) and 7, the disposable wearing article 10a of Example 2 has flap members 18a, 18b attached to the front body 12 so as to straddle the break induction lines 24a, 24b formed in the front body 12, similar to Example 1.

[0091] When viewed from a direction perpendicular to the main surface 12s of the front body 12, the first joints 20p, 20q joining the front body 12 and the back body 14 overlap with the second joints 22p, 22q joining the flap members 18a, 18b and the front body 12. Because the first joints 20p, 20q and the second joints 22p, 22q overlap, the first joints 20p, 20q and the second joints 22p, 22q can be formed simultaneously.

[0092] Next, a method for manufacturing the disposable wearing article 10a will be described with reference to Fig. 6. Fig. 6 is a schematic diagram of a manufacturing process for the disposable wearing article 10a.

[0093] The method for producing the disposable wearing article 10a includes the following first to fourth steps.

[0094] (i) As shown in Fig. 6, a main body continuum 11 is formed and conveyed in the direction indicated by the arrow. In detail, a main body continuum 11 is formed in which a portion 11k to be an individual piece including a front body 12 on which first and second breakage guiding wires 24a, 24b are formed, a back body 14, and a crotch portion 16 joined to the front body 12 and the back body 14 is connected, and conveyed in a state in which a front body continuous portion 12k to which the portion to be the front body 12 is connected and a back body continuous portion 14k to which the portion to be the back body 14 is connected are separated from each other. This is the first process.

[0095] (ii) Furthermore, the continuous base material strip 30 and the continuous hook strip 35 are used to form the pre-separation flap member 18c. That is, the continuous base material strip 30 for forming the first and second flap members 18a, 18b and the continuous hook strips 32, 34 for forming the hook members 19a, 19b are joined to each other while being conveyed and cut into a predetermined shape to form the pre-separation flap member 18c in which the first and second flap members 18a, 18b having the hook members 19a, 19b, respectively, are connected. This is the second process.

[0096] Specifically, the continuous substrate body 30 and the continuous hook body 35 are transported in the direction indicated by the arrow.

[0097] Next, a slit is formed in the widthwise middle position of the continuous hook body 35 using a slitting device 80 to form the first and second continuous hook bodies 32, 34.

[0098] Next, the first and second hook continuous bodies 32, 34 are cut to a predetermined length using a cut-and-slip device 82 to sequentially form pairs of hook members 19a, 19b, and the pairs of hook members 19a, 19b are attached to one main surface 30s of the continuous base material body 30 with a gap between them in the conveying direction to form the continuous flap body 31. At this time, the surfaces of the hook members 19a, 19b opposite to the hook surfaces are attached to one main surface 30s of the continuous base material body 30 along the side edges 30m, 30n of the continuous base material body 30. Although not shown, before attaching the hook members 19a, 19b, for example, an adhesive is applied to predetermined locations of the continuous base material body 30 and / or the hook members 19a, 19b.

[0099] Next, the pin embossing device 84 is used to strengthen the bonds between the continuous base material 30 of the continuous flap body 31 and the hook members 19a, 19b.

[0100] Next, the flap continuous body 31 is cut at a predetermined position between the hook members 19a, 19b adjacent to each other in the conveying direction by using the cut-and-turn device 88 to form the pre-division flap member 18c, and then the pre-division flap member 18c is rotated 90° with respect to the conveying direction while being conveyed. The cut-and-turn device 88 conveys the flap continuous body 31 while supporting the other main surface of the base material continuous body 30.

[0101] The pre-split flap member 18c can also be formed by other methods. For example, similar to the first embodiment shown in FIG. 4, the base material continuous body 30 and the first and second hook continuous bodies 32, 34 are joined and processed to form a second continuous body 30b having hook members 19a, 19b. Next, unlike the first embodiment, the second continuous body 30b is not divided into a pair of third continuous bodies 31a, 31b, but is cut at a predetermined position to form the pre-split flap member 18c, and then the orientation of the pre-split flap member 18c is changed. The pre-split flap member 18c has first and second hook members 19a, 19b facing each other, and is formed so that the first portions 18p of the first and second flap members 18a, 18b are connected to each other.

[0102] In this case, when the pre-division flap member 18c is formed, both the first and second hook continuous bodies 32, 34 of the second continuous body 30b and the base material continuous body 30 are cut simultaneously, so the cutting blade used for cutting is prone to wear.

[0103] 6, when the first and second hook continuous bodies 32, 34 and the base material continuous body 30 of the hook continuous body 31 are cut using separate devices 82, 88, the cutting can be performed more efficiently than when both are cut simultaneously, and it is easy to increase the conveying speed and improve production efficiency. In addition, wear on the cutting blades used for cutting can be suppressed, and the production line can be operated more efficiently.

[0104] (iii) Next, the division front flap member 18c is overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11, and the back body continuous portion 14k of the main body continuum 11 is overlapped on the other main surface 12t of the front body continuous portion 12k of the main body continuum 11, and the division front flap member 18c and the overlapped front body continuous portion 12k and the back body continuous portion 14k of the main body continuum 11 are joined to each other to form first joints 20p, 20q joining the front body continuous portion 12k and the back body continuous portion 14k of the main body continuum 11 to each other, and second joints 22p, 22q joining the division front flap member 18c and the front body continuous portion 12k of the main body continuum 11 to each other. This is the third step.

[0105] At this time, the pre-split flap member 18c is overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11 so that the boundary line 18k between the pair of opposing first and second hook members 19a, 19b of the pre-split flap member 18c overlaps with the boundary line of the portion 11k of the main body continuum 11 that is to become an individual piece, and the pair of first and second break induction wires 24a, 24b formed on the front body continuous portion 12k of the main body continuum 11 are positioned between the hook members 19a, 19b of the pre-split flap member 18c.

[0106] In the third step, the first sub-step of overlapping the divided front flap member 18c onto one main surface 12s of the front body continuous portion 12k of the main body continuum 11 may be performed before the second sub-step of overlapping the back body continuous portion 14k of the main body continuum 11 onto the other main surface 12t of the front body continuous portion 12k of the main body continuum 11, or may be performed after the second sub-step, or may be performed simultaneously with the second sub-step.

[0107] (iv) Next, the joined divided front flap members 18c and the continuous main body 11 are cut so that the pair of first joining portions 20p, 20q join both ends 12a, 12b; 14a, 14b of the front body 12 and the back body 14 to each other, and the pair of second joining portions 22p, 22q join the front body 12 and the flap members 18a, 18b to each other to form the individual pieces. This is the fourth step.

[0108] In the first step (i) above, the first and second break induction wires 24a, 24b are formed so that the tear strength of the first and second break induction wires 24a, 24b is weaker than the tear strength of the front body continuous portion 12k in the portion where the first and second break induction wires 24a, 24b are not formed.

[0109] In the third step (iii) above, the second joints 22p, 22q are formed so that the tear strength of the first and second breakage guiding wires 24a, 24b is weaker than the tear strength of the second joints 22p, 22q.

[0110] As a result, the disposable wearing article 10a, which can be reliably torn along the breakage guide lines 24a, 24b, can be continuously and efficiently manufactured. The first joint portions 20p, 20q that join the front body 12 and the back body 14 to each other and the second joint portions 22p, 22q that join the front body 12 and the flap members 18a, 18b to each other can be formed simultaneously, simplifying the manufacturing process.

[0111] In the third step (iii) above, the first joints 20p, 20q may be formed so that the tear strength of the first and second breakage guiding wires 24a, 24b is weaker than the tear strength of the first joints 20p, 20q.

[0112] In this case, a disposable wearing article 10a can be manufactured in which the front body 12 can be reliably torn along the breakage guide lines 24a, 24b without the front body 12 and the back body 14 being separated from each other at the first joint portions 20p, 20q.

[0113] In the third step (iii) above, the front division flap member 18c may be overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11 and temporarily fixed thereto.

[0114] In this case, (a) adhesive is applied to the front body continuous portion 12k of the main body continuum 11, the base material continuum 30, or the pre-division flap member 18c so that when the pre-division flap member 18c is overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11, an adhesive-application portion is positioned between the pre-division flap member 18c and the front body continuous portion 12k of the main body continuum 11 to form the adhesive-application portion, and (b) in the third step, the pre-division flap member 18c is overlapped and temporarily fixed on one main surface 12s of the front body continuous portion 12k of the main body continuum 11 via the adhesive-application portion to form the second joints 22a, 22b.

[0115] By temporarily fixing the pre-separation flap member 18c, the conveying speed of the production line can be increased compared to a case where the pre-separation flap member 18c is not temporarily fixed, and it is easy to increase the number of products produced per unit time.

[0116] <Modification 1> Fig. 8 is an enlarged schematic diagram of a main part of a disposable wearing article according to modification 1. As shown in Fig. 8, a plurality of elastic members 13 such as rubber threads are arranged on the front body 12. The elastic members 13x intersecting with the through-hole portions 24s of the perforations that form the break guide line 24, which penetrate between the main surfaces 12s and 12t of the front body 12, are cut when the through-hole portions 24s are formed, but the elastic members 13a and 13b intersecting with the non-through-hole portions 24x between the adjacent through-hole portions 24s are not cut. The uncut elastic members 13a and 13b are not cut even when the front body 12 is torn along the break guide line 24, and therefore need to be torn off when wearing the disposable wearing article.

[0117] In order to prevent such uncut elastic members 13a, 13b from remaining, auxiliary cut lines 25 are provided in the areas adjacent to the breakage induction lines 24.

[0118] Auxiliary cut lines 25 are formed at a pitch smaller than the perforations of break induction lines 24 so that front body 12 is torn along break induction lines 24 without being torn along auxiliary cut lines 25. For example, elastic member 13 is cut in the area near break induction lines 24 using a cutter with a blade pitch set smaller than the perforations of break induction lines 24, so that the nonwoven fabric of front body 12 is not substantially cut.

[0119] In order to form the auxiliary cut line 25, the same anvil as that for forming the perforations of the break guide line 24 may be used, or a separate device may be used.

[0120] The auxiliary cut lines 25 may be formed by melting the elastic member 13 or by other methods.

[0121] The auxiliary cut line 25 is used to cut at least the elastic members 13a, 13b that would not be cut when forming the break induction lines 24a, 24b in the absence of the auxiliary cut line 25, before forming the break induction lines 24a, 24b, or at the same time as forming the break induction lines 24a, 24b, or after forming the break induction lines 24a, 24b.

[0122] <Modification 2> A method for manufacturing a disposable wearing article according to Modification 2 will be described with reference to Figs. 9 and 10. Figs. 9 and 10 are schematic diagrams of the manufacturing process of a disposable wearing article. In Modification 2, the flap members 18a, 18b formed using the continuous base material pieces 30i, 30j and the continuous hook pieces 32, 34 can be superimposed on one main surface 12s of the front body continuous portion 12k of the continuous main body piece 11 without changing the orientation with respect to the conveying direction.

[0123] As shown in FIG. 9, the substrate continuous bodies 30i, 30j for forming the flap members 18a, 18b and the first and second hook continuous bodies 32, 34 for forming the hook members 19a, 19b are transported in the directions in which they continue, and the first and second hook continuous bodies 32, 34 are cut to a predetermined width to form unprocessed hook members 32k, 34k.

[0124] Next, unfabricated hook members 32k, 34k are arranged at a predetermined pitch with spaces between them on substrate continuous bodies 30i, 30j, and the unfabricated hook members 32k, 34k are joined to substrate continuous bodies 30i, 30j by adhesive, heat sealing, ultrasonic bonding, or the like to form a pair of first continuous bodies 37a, 37b.

[0125] Next, an adhesive such as hot melt is applied to predetermined positions of the pair of first continuous bodies 37a, 37b to form a pair of second continuous bodies 37u, 37v having adhesive-applied portions 36a, 36b formed therein. At this time, the adhesive-applied portions 36a, 36b and the unprocessed hook members 32k, 34k are arranged on the same surface of the substrate continuous bodies 30i, 30j with a gap between them.

[0126] Next, trimming portions 37p, 37q of a predetermined shape shown by dashed lines are cut away to form flap members 18a, 18b having hook members 19a, 19b formed by cutting unprocessed hook members 32k, 34k and adhesive application portions 36a, 36b.

[0127] Next, the flap members 18a, 18b are arranged in pairs with a predetermined gap therebetween.

[0128] In parallel with the above steps, as shown in Figure 10, as in Examples 1 and 2, the main body continuous body 11 is transported in the direction in which the portions 11k that are to become individual pieces are continuous, with the front body continuous portion 12k and the back body continuous portion 14k separated from each other.

[0129] Next, the paired flap members 18a, 18b are overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11 so that the hook members 19a, 19b and adhesive application portions 36a, 36b of the flap members 18a, 18b face one main surface of the front body continuous portion 12k of the main body continuum 11, and the pair of flap members 18a, 18b are temporarily fixed to one main surface 12s of the front body continuous portion 12k of the main body continuum 11 via the adhesive application portions 36a, 36b.

[0130] At this time, a pair of flap members 18a, 18b are arranged on both sides of the boundary line of the portion 11k of the main body continuum 11 that is to become an individual piece, and one of the pair of breakage induction wires 24a, 24b is arranged between the hook members 19a, 19b of each of the pair of flap members 18a, 18b and the adhesive application portions 36a, 36b.

[0131] Next, the pair of flap members 18a, 18b temporarily fixed to the front body continuous portion 12k of the main body continuous body 11 and the front body continuous portion 12k of the main body continuous body 11 are joined to each other by heat sealing, ultrasonic bonding, etc. to form second joints 22a, 22b.

[0132] Next, the main body continuous body 11 is folded back as shown by the arrow 11x, and the back body continuous portion 14k of the main body continuous body 11 is overlapped on the other main surface 12t of the front body continuous portion 12k of the main body continuous body 11.

[0133] Next, the overlapping front body continuous portion 12k and back body continuous portion 14k of the main body continuous body 11 are joined to each other by heat sealing, ultrasonic bonding, etc. at a predetermined position between the pair of flap members 18a, 18b to form first joints 20a, 20b.

[0134] Next, the main body continuum 11 is cut at cutting positions 10x indicated by dashed lines to form individual pieces.

[0135] In addition, without forming the adhesive application portions 36a, 36b, the flap members 18a, 18b may be overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11, and the flap members 18a, 18b and the front body continuous portion 12k of the main body continuum 11 may be joined to each other while holding the flap members 18a, 18b with an appropriate member.

[0136] Also, the flap members 18a, 18b may not be temporarily fixed, but may be fixed immediately after being placed on the front body continuous portion 12k of the main body continuous body 11.

[0137] In addition, the flap members 18a, 18b may be overlapped on one main surface 12s of the front body continuous portion 12k of the main body continuum 11 without being paired, and the flap members 18a, 18b and the front body continuous portion 12k of the main body continuum 11 may be joined to each other.

[0138] <Modification 3> A manufacturing process of a disposable wearing article according to Modification 3 will be described with reference to Fig. 11. Fig. 11 is a schematic diagram of the manufacturing process of a disposable wearing article. In Modification 3, the first and second flap members 18a, 18b are manufactured without cutting out the trimmed portions from the continuous base material body 30 and the continuous hook body 33.

[0139] As shown in FIG. 11, a continuous base material strip 30 for forming the first and second flap members 18a, 18b and a continuous hook strip 33 for forming the first and second hook members 19a, 19b are transported.

[0140] Next, the continuous hook body 33 is placed at the widthwise central position of the continuous base material body 30, and the continuous hook body 33 is fixed to the continuous base material body 30 by heat sealing, ultrasonic bonding, or the like to form a first continuous body 30c.

[0141] Next, the first continuous body 30c is cut in an appropriate sequence along the inner cutting line 39c and the outer cutting lines 39a, 39b to form first and second flap members 18a, 18b having either the first or second hook members 19a, 19b.

[0142] The inner cutting line 39c extends in a wavy manner at the widthwise middle position of the first continuum 30c, divides the first continuum 30c into a portion on one side edge 30m side and a portion on the other side edge 30n side of the base material continuum 30, and cuts the hook continuum 33 to form the hook members 19a, 19b. The outer cutting lines 39a, 39b extend between the side edges 30m, 30n of the base material continuum 30 and the inner cutting line 39c, and cut one side and the other side of the first continuum 30c cut by the inner cutting line 39c.

[0143] Although not shown, if necessary, an adhesive such as hot melt may be applied to the base material continuous body 30, the first continuous body 30c, and the first and second flap members 18a, 18b at an appropriate timing to form an adhesive application portion for temporarily fixing them to one main surface 12s of the front body continuous portion 12k of the main body continuous body 11.

[0144] <Variation 4> The flap members 18a, 18b formed using a continuous base material body and a continuous hook body may be arranged on one main surface 12s of the front body continuous portion 12k of the main body continuous body 11 at an appropriate timing without being paired.

[0145] <Summary> As described above, a disposable wearing article can be provided in which the front body portion can be securely torn along the break guide line, and after torn, the front body portion can be wrapped around the legs and refastened using the flap members.

[0146] The present invention is not limited to the above-described embodiment, but can be implemented with various modifications.

[0147] For example, the first or second embodiment may be appropriately combined with one or more of the first to fourth modifications. [Explanation of symbols]

[0148] 10,10a Disposable clothing items 11 Body Continuum Parts that will become 11k pieces 12 Front 12a, 12b both ends 12p upper edge 12q lower edge 12s One main surface 12t Other main surface 12k Front body continuous section 14 Back 14a, 14b both ends 14k back body continuous 16 Crotch area 18a, 18b Flap members 18c Pre-split flap member 18p Part 1 18q 2nd part 19a, 19b Hook member (fastening portion) 20a,20b,20p,20q 1st joint 22a, 22b, 22p, 22q 2nd joint 24, 24a, 24b Breaking guide wire (perforation) 24s penetration part 30, 30i, 30j Substrate continuum 32, 33, 34, 35 Hook Continuum 36a, 36b Adhesive application section

Claims

1. A front body that is placed on the wearer's stomach when worn; A back body that is placed on the back of the wearer when worn; A crotch portion connected to the front body and the back body; A pair of first joining portions joining both ends of the front body and the back body to each other; a pair of flap members each having a first portion and a second portion, the second portions facing each other, the first portions being adjacent to either one of the two end portions of the front body, the pair being disposed along one main surface of the front body opposite the back body, and the second portions having a fastening portion configured to be releasably fastened to the one main surface of the front body; a pair of second joining portions joining the first portion of each of the flap members to the front body; A pair of break guide lines formed on the front body so as to extend between the upper edge and the lower edge of the front body and pass between the second joint portion and the fastening portion of each of the flap members; Equipped with The disposable wearing article has a tear strength of the break guide line that is weaker than a tear strength of the front body portion where the break guide line is not formed and is also weaker than a tear strength of the second joint portion.

2. The disposable wearing article according to claim 1 , wherein a tear strength of the breakage induction wire is lower than a tear strength of the first bonded portion.

3. The disposable wearing article according to claim 1 or 2, wherein the first joining portion and the second joining portion overlap each other when viewed from a direction perpendicular to the one main surface of the front body.

4. 4. The disposable wearing article according to claim 1, wherein the break guide line is a perforation having a plurality of through portions that penetrate between the one main surface and the other main surface of the front body.

5. 5. The disposable wearing article according to claim 1, wherein the fastening portion is a hook member of a hook-and-loop fastener.

6. a first step of forming a main body continuum in which portions to be individual pieces, including a front body having first and second break guide lines formed therein, a back body, and a crotch section joined to the front body and the back body, are connected, and the main body continuum is transported in a state in which a front body continuum portion to which the portion to be the front body is connected and a back body continuum portion to which the portion to be the back body is connected are separated from each other; a second step of joining a continuous base material strip for forming the first and second flap members and a continuous hook strip for forming the hook members to each other while conveying the continuous base material strip and cutting the continuous hook members into a predetermined shape to form the first and second flap members each having the hook member; a third step of overlapping the first and second flap members on one main surface of the front body continuous portion of the main body continuous body, and joining the first and second flap members and the front body continuous portion of the main body continuous body to each other to form a second joining portion; a fourth step of overlapping the back body continuous portion on the other main surface of the front body continuous portion of the main body continuous body, and joining the overlapped front body continuous portion and the back body continuous portion of the main body continuous body to each other to form a first joining portion; a fifth step of cutting the main body continuous body so as to form the individual pieces in which a pair of the first joint portions join both ends of the front body and the back body to each other and a pair of the second joint portions join the front body and the first and second flap members to each other; Equipped with In the first step, the first and second break guiding wires are formed so that the tear strength of the first and second break guiding wires is weaker than the tear strength of the front body continuous portion in a portion where the first and second break guiding wires are not formed, the second joint portion is formed such that tear strengths of the first and second breakage guiding wires are weaker than tear strength of the second joint portion in the third step.

7. The method for manufacturing a disposable wearing article according to claim 6, wherein the first joint portion is formed so that tear strengths of the first and second breakage guiding wires are weaker than tear strength of the first joint portion.

8. applying adhesive to the front body continuous portion of the main body continuum, the base material continuous portion, or the first and second flap members so that an adhesive-applied portion is disposed between the first and second flap members and the front body continuous portion of the main body continuum when the first and second flap members are overlapped on the one main surface of the front body continuous portion of the main body continuum; and forming the adhesive-applied portion; 8. The method for manufacturing a disposable wearing article according to claim 6 or 7, wherein in the third step, the first and second flap members are overlapped and temporarily fixed to the one main surface of the front body continuous portion of the main body continuous body via the adhesive application portion to form the second joint portion.

9. a first step of forming a main body continuum in which portions intended to become individual pieces, including a front body having first and second break guide lines formed therein, a back body, and a crotch section joined to the front body and the back body, are connected, and the main body continuum is transported in a state in which a front body continuum portion to which the portion intended to become the front body is connected and a back body continuum portion to which the portion intended to become the back body is connected are separated from each other; a second step of joining a continuous base material strip for forming the first and second flap members and a continuous hook strip for forming the hook members to each other while conveying the continuous base material strip and cutting the continuous hook members into a predetermined shape to form a pre-separation flap member in which the first and second flap members each having the hook members are connected; a third step of overlapping the divided front flap member on one main surface of the front body continuous portion of the main body continuum and overlapping the back body continuous portion of the main body continuum on the other main surface of the front body continuous portion of the main body continuum, and joining the divided front flap member and the overlapped front body continuous portion and back body continuous portion of the main body continuum to each other to form a first joint portion joining the front body continuous portion and the back body continuous portion of the main body continuum to each other and a second joint portion joining the divided front flap member and the front body continuous portion of the main body continuum to each other; a fourth step of cutting the joined divided front flap members and the continuous main body so as to form the individual pieces in which a pair of the first joining portions join both ends of the front body and the back body to each other and a pair of the second joining portions join the front body and the flap members to each other; Equipped with In the first step, the first and second break guiding wires are formed so that the tear strength of the first and second break guiding wires is weaker than the tear strength of the front body continuous portion in a portion where the first and second break guiding wires are not formed, the second bonded portion is formed such that tear strengths of the first and second breakage guiding wires are weaker than tear strength of the second bonded portion in the third step.

10. The method for manufacturing a disposable wearing article according to claim 9 , wherein the first joint portion is formed so that tear strengths of the first and second breakage guiding wires are weaker than tear strength of the first joint portion.

11. When the division front flap member is superimposed on the one main surface of the front body continuous portion of the main body continuous body, an adhesive is applied to the front body continuous portion of the main body continuous body, the base material continuous body, or the division front flap member so that an adhesive application portion is disposed between the division front flap member and the front body continuous portion of the main body continuous body, thereby forming the adhesive application portion; 11. The method for manufacturing a disposable wearing article according to claim 9 or 10, wherein in the third step, the divided front flap member is overlapped and temporarily fixed to the one main surface of the front body continuous portion of the main body continuous body via the adhesive application portion to form the first joint portion and the second joint portion.

12. In the second step, Transporting the continuous substrate body and the continuous hook body; Dividing the continuous hook body into first and second continuous hook bodies; cutting the first and second hook strings to form the pair of hook members; The pair of hook members are joined to the continuous base material at intervals in the conveyance direction to form a continuous hook body; The method for manufacturing a disposable wearing article according to claim 9 or 10, further comprising cutting the continuous hook strip between adjacent pairs of the hook members to form the pre-divided flap members.

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