JP2009006024A - Manufacturing method of pants-type disposable diaper and pants-type disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pants-type disposable diaper fitting in a body shape of a user and its manufacturing method capable of covering the backside of the user without the side drop while the material waste is prevented in the manufacturing process. <P>SOLUTION: A longitudinal sheet 51 forming the exterior members having body-worn function for covering the body of a user is divided on an anteroposterior dividing line 52 which repeats in the longitudinal direction with the half length of the required size for forming the waist perimeter as one circle in order to divide in half in the width direction, a first split dividing line 53 formed in each one circle at the predetermined position of the first split 61, and a second split dividing line 54 formed in each one circle at the predetermined position of the second split 62, and it results that a first exterior member 63 forming the anterior body and the crotch part, and a second exterior member 64 forming the posterior body and the crotch part different from the crotch part of the first exterior member are formed, and brought together to obtain the pants-type disposable diaper 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a pants-type disposable diaper and a pants-type disposable diaper. More specifically, the present invention relates to a pants-type disposable diaper that is formed in a pant-type by forming one waist-opening and a pair of leg-openings.

  Pants-type disposable diapers can be worn by the wearer in the same manner as cloth pants. In addition to being able to change diapers in a short time, diapers can be worn while the wearer is standing. Exchanges can also be made. In addition, unlike a tape-type diaper, there is no need to adjust the size around the waist with a fixing tape, and the diaper can be easily replaced.

  As a pants-type disposable diaper, for example, Patent Document 1 is known. This pants-type disposable diaper includes a waistband and has good fit, but depending on the wearer's body shape, there are few portions that cover the buttocks, so that the buttocks may protrude.

  On the other hand, Patent Document 2 is known as a disposable wearing article that does not waste resources and a method for manufacturing the component. This is a technology for manufacturing a top sheet or back sheet by dividing the sheet into two by a sine curve-shaped cutting line, and is a technology for preventing waste of resources, but the back side and the abdomen side are the same shape. Inferior fit.

Japanese Patent No. 28224856 Japanese Patent No. 3317836

  In the conventional disposable diaper, the material is often wasted in the manufacturing process, and as in Patent Document 2, the material that prevents the waste of the material is not in a shape suitable for the wearer's body shape. Many.

  An object of the present invention is to provide a pants-type disposable diaper suitable for a wearer's body shape and a manufacturing method thereof, which can prevent the waste of materials in the manufacturing process and can cover the wearer's buttocks without protruding. is there.

  The inventor is configured by dividing a long sheet body for forming an exterior member having a mounting function for encapsulating a wearer's body composed of each part of a crotch part and a back body. By forming a first exterior member that forms a crotch part and a second exterior member that forms a crotch part having a shape different from the back body and the crotch part of the first exterior member, and joining them together, I found that it could be solved. Specifically, according to the present invention, the following pant-type disposable diaper manufacturing method and pant-type disposable diaper are provided.

[1] To form a long sheet body around the waist for forming an exterior member having a mounting function for encapsulating a wearer's body, which is composed of the front body, the crotch part, and the back body. The front and rear dividing lines which are repeated in the longitudinal direction and divided into two in the width direction with a half length of the required dimension as one period, and the predetermined positions of the first divided body divided by the front and rear dividing lines every period A first divided body dividing line perpendicular to the longitudinal direction connecting the end in the width direction of the long sheet body and the front and rear dividing lines, and a second divided body divided by the front and rear dividing lines. And a second position perpendicular to the longitudinal direction, formed at a predetermined position shifted by a half cycle from the first divided body dividing line for each period, and connecting the end in the width direction of the long sheet body and the front and rear dividing lines. By dividing with the dividing line dividing line, the front body and Forming a first exterior member that forms a lower part, and a second exterior member that forms a crotch part having a shape different from the back body and the crotch part of the first exterior member, and the first exterior member and the second exterior member. The manufacturing method of the underpants type disposable diaper which joins an exterior member with corresponding side edge parts and crotch parts, and forms one waist circumference opening and a pair of leg circumference opening.

[2] To form a long sheet body around the waist for forming an exterior member having a mounting function for encapsulating a wearer's body, which is composed of the front body, the crotch part, and the back body. The first divided body is divided into a first divided body and a second divided body by dividing by a front and rear dividing line which is repeated in the longitudinal direction and divided into two in the width direction, with a half length of the required dimension as one cycle. The first divided body perpendicular to the longitudinal direction, which is joined at the crotch parts of the divided body and the second divided body and is formed at predetermined positions in the first divided body and the second divided body for each period. A first exterior member that forms a front body and a crotch part is divided by a dividing line and a second divided body parting line, and a crotch part having a shape different from the crotch part of the back body and the first exterior member is formed. Individual joining with the second exterior member to be formed Pants that form a single waist circumference opening and a pair of leg circumference openings by joining the first exterior member and the second exterior member of the individual joined body at corresponding side edges. Type disposable diaper manufacturing method.

[3] In the long sheet body before being divided into two by the front and rear parting lines, the first parting part parting line is located in the longitudinal center of the crotch part of the second exterior member, A division body parting line is the manufacturing method of the underpants type disposable diaper as described in said [1] or [2] located in the said longitudinal direction center of the said crotch part of a said 1st exterior member.

[4] A pants-type disposable diaper manufactured by the method for manufacturing a pants-type disposable diaper according to any one of [1] to [3].

  According to the manufacturing method of the underpants type disposable diaper of this invention, the 1st exterior member which forms a front body and a crotch part by dividing | segmenting a long sheet body, and the 2nd exterior member which forms a back body and a crotch part Therefore, waste of resources can be prevented. Moreover, since the crotch part of the 2nd exterior member is formed in the shape different from a 1st exterior member, fit property can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and changes, modifications, and improvements can be added without departing from the scope of the invention.

  Hereinafter, an example of a two-piece type pants-type disposable diaper will be described. The “two-piece type” means an absorbent main body 14 that functions to absorb and retain the excrement of the wearer (absorption / retention function) as in the pants-type disposable diaper 1 shown in FIGS. 1 and 2. And the exterior member 16 which bears the function (mounting function) which encloses a wearer's body, The diaper of the type by which the absorptive main body 14 was arrange | positioned inside the exterior member 16 shall be meant. The absorptive main body 14 is a member provided with an absorber 22, a top sheet 18, and a back sheet 20 as components.

  In the present specification, the term “pants-type disposable diaper” refers to the corresponding side edges of the front body 2 and the back body 6 (side edges 2a, 6a) as in the pants-type disposable diaper 1 shown in FIG. , The side edge portions 2b and 6b) are joined to form a joint portion 8, one waist opening portion 10 and a pair of leg opening portions 12a and 12b, which means a diaper configured in a pants shape in advance. Shall.

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

[1] Configuration of the pants-type disposable diaper of the present invention:
FIG. 1: is a schematic perspective view which shows one Embodiment of the underpants type disposable diaper of this invention, and is the figure which shows the state which looked at the underpants type disposable diaper of this invention from the front. Moreover, FIG. 2 is a top view which shows one Embodiment of the underpants type disposable diaper of this invention, The figure which expand | deploys the underpants type disposable diaper shown in FIG. 1, and shows the state seen from the absorptive main body side of the diaper. It is.

  The pants-type disposable diaper of this invention is comprised from each part of the front body 2, the crotch part 4, and the back body 6 like the pants-type disposable diaper 1 shown in FIGS. Corresponding side edge portions 2a and 6a (2b and 6b) are joined together (joint portion 8) to form one waist opening 10 and a pair of leg openings 12 (12a and 12b). 16 and an absorbent main body 14. The exterior member 16 is made of a nonwoven fabric and forms the front body 2, the crotch 4, and the back body 6, and includes a first exterior member 63 and a second exterior member 64. As shown in FIG. 3, the absorbent main body 14 is configured to absorb the excrement absorption body 22 and the top sheet 18 that is disposed so as to cover the surface of the absorption body 22 and at least a part thereof is made of a liquid-permeable material. And the back sheet 20 disposed so as to cover the back surface of the absorber 22.

  The first exterior member 63 that forms the front body 2 and the crotch part 4 and the second exterior member 64 that forms the back body 6 and the crotch part 4 are formed in different shapes. As shown in FIGS. 1 and 2, the crotch part 4 of the second exterior member 64 is formed wider than the crotch part 4 of the first exterior member 63. More specifically, as shown in FIG. 4, the length b of the flat end at the lower end of the crotch part 4 of the second exterior member 64 is greater than the length a of the flat end at the lower end of the crotch part 4 of the first exterior member 63. Is also formed wide. By forming in this way, a wearer's buttocks can be covered widely and fit nature can be improved.

[1-1] Joint part:
In the pants-type disposable diaper of the present invention, the first exterior member 63 and the second exterior member 64 are joined at joint points to form an outer leg side joint part and a crotch joint part. For example, as shown in FIG. 2, in the pants-type disposable diaper 1, the crotch joint 8 b can be joined by heat joining such as heat sealing or heat embossing. Moreover, as shown in FIG. 1, the thigh side joint part 8a can be formed similarly.

[1-2] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable. In addition, in order to prevent the shape of the absorbent body from being lost, the absorbent body may be configured by adding synthetic fibers such as heat-sealing fibers in addition to natural fibers such as fluff pulp.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

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

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

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

[1-3] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the back surface side needs to absorb the wearer's urine.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among them, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polyolefin (polypropylene, polyethylene, etc.), polyester, aliphatic polyamide (so-called nylon), etc., which has been subjected to a hydrophilic treatment. The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials.

[1-4] Backsheet:
A backsheet is a sheet | seat arrange | positioned so that the back surface (surface located in a wearer's clothing side at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

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

[1-5] Absorbent body:
The pants-type disposable diaper of the present invention may be a one-piece type pants-type diaper, but the top sheet, the back sheet, and the absorber are configured as one member called an “absorbent body” that has an absorption / holding function. And it can comprise as what is called a 2 piece type underpants type diaper comprised by joining with the exterior member manufactured separately.

  For example, FIG. 3 shows that the absorbent body 22 is sandwiched between the top sheet 18 and the back sheet 20, and the absorbent body 22 is sealed between the top sheet 18 and the back sheet 20. It is the example which comprised the absorptive main body 14 of the structure where was interposed.

[1-6] Exterior member:
The exterior member is a member having a mounting function for encapsulating the wearer's body, and specifically, is a sheet-like member that forms the front body, the crotch portion, and the back body.

  In the two-piece type disposable diaper, the absorbent main body serves exclusively for the absorption and holding function of absorbing and holding the wearer's excrement, so a liquid-impermeable material as a material constituting the exterior member There is no need to use. In the pants-type disposable diaper of the present invention, the exterior member is preferably made of a nonwoven fabric. Although the kind of nonwoven fabric is not specifically limited, For example, the nonwoven fabric etc. which were comprised by the synthetic fiber which consists of polyolefin (polyethylene, polypropylene, etc.), polyester, aliphatic polyamide (what is called nylon), and another thermoplastic resin can be mentioned. As described above, a nonwoven fabric made of synthetic fibers is often used as a constituent material of the exterior member, but a nonwoven fabric made of natural fibers (for example, cotton) may be used for a part of the exterior member (for example, the inner surface). .

  And in order to fix an exterior member in the state which pinched | interposed the elastic material etc. around the waist, in many cases, it is comprised by bonding together two or more nonwoven fabrics. For example, in the pants-type disposable diaper 1 shown in FIGS. 1 and 2, the exterior member 16 is configured by bonding two nonwoven fabrics, an inner sheet and an outer sheet, and a waist elastic member 42 and an abdomen between the nonwoven fabrics. This is an example in which a surrounding elastic member 44 is sandwiched and fixed.

[1-7] Various elastic materials:
In a pants-type disposable diaper, it is common to arrange an elastic material around the leg and arrange an elastic material around the waist, but the pant-type disposable diaper 1 of the present invention may not arrange an elastic material around the leg. desirable. With this configuration, high-speed production becomes possible. Furthermore, it is preferable to arrange an elastic material around the abdomen.

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

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

  1 and 2, the pants-type disposable diaper 1 has a plurality of waist elastic members 42 arranged around the waist opening 10 at the periphery of the waist opening 10, and further around the waist. A plurality of elastic members 44 around the abdomen are provided in a portion between the opening 10 and the leg periphery openings 12a and 12b (that is, a portion corresponding to the circumference of the wearer's abdomen) so as to surround the wearer's abdomen. This is an example of arrangement.

  As an elastic material, the elastic material which has been used with the conventional disposable diaper can be used conveniently. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc., as well as thread rubber and flat rubber made of elastic materials such as natural rubber and synthetic rubber (urethane rubber, etc.). .

[2] Method for producing a pants-type disposable diaper of the present invention:
Hereinafter, the manufacturing method of the underpants type disposable diaper of this invention is demonstrated, referring FIGS. 4-6 by the example in the case of manufacturing the underpants type disposable diaper 1 shown in FIG.1 and FIG.2.

[2-1] Production of absorbent main body:
An absorber wrapped in a hydrophilic sheet is disposed on the upper surface of the back sheet, and a top sheet is further disposed on the upper surface. Subsequently, the absorptive main body 14 is obtained by sealing so that the peripheral part of an absorber may be pinched | interposed with a top sheet and a back sheet.

[2-2] Production of long sheet:
A long sheet body in which a long elastic material is disposed between layers of a plurality of long sheet materials is formed. In the case of the pants-type disposable diaper 1 shown in FIGS. 1 and 2, the exterior member 16 is composed of two nonwoven fabrics, an inner sheet and an outer sheet. The waist stretchable material 42 and the abdominal stretchable material 44 are placed on the upper surface of one of these nonwoven fabric sheets (this sheet becomes the outer sheet) and bonded and fixed. Further, another non-woven sheet (this sheet becomes an inner sheet) is laminated and fixed on the upper surface, so that a waist elastic member 42 and an abdominal elastic member are provided between the two non-woven sheets. The long sheet body 51 in which 44 is interposed is obtained. The long sheet body 51 is configured to form an exterior member having a mounting function for encapsulating a wearer's body, which is composed of the front body, the crotch part, and the back body.

[2-3a] Production of exterior member (Embodiment 1):
The long sheet body 51 obtained in the previous step is cut along the front-rear parting line 52, the first parting part parting line 53, and the second parting part parting line 54 shown in FIG. The front-rear parting line 52 is repeated in the longitudinal direction with a half length of a required dimension for forming the circumference of the waist as one cycle, and divides the long sheet body 51 into two in the width direction. The first divided body dividing line 53 is formed at a predetermined position of the first divided body 61 divided by the front and rear dividing lines 52 for each period, and the widthwise end of the long sheet body 51 and the front and rear dividing lines are connected. This is a dividing line perpendicular to the knot longitudinal direction. The second divided body dividing line 54 is formed for each period at a predetermined position of the second divided body 62 divided by the front and rear dividing lines 52 and shifted from the first divided body dividing line 53 by a half cycle. This is a dividing line that connects an end in the width direction of the body 51 and the front and rear dividing lines and is perpendicular to the longitudinal direction. The first divided body parting line 53 is located at the center in the longitudinal direction of the crotch part of the second exterior member 64, and the second divided body parting line 54 is located at the longitudinal center of the crotch part of the first exterior member 63.

  By dividing the long sheet body 51 by the front and rear parting line 52, the first parting part parting line 53, and the second parting part parting line 54 as described above, the front body 2 and the crotch part 4 as shown in FIG. And a second exterior member 64 having a crotch part 4 having a shape different from the crotch part 4 of the back body 6 and the first exterior member 63. Specifically, the width of the crotch part 4 of the second exterior member 64 is formed wide. By dividing the long sheet body 51, the first exterior member 63 and the second exterior member 64 are obtained, so that the material is not wasted and the manufacturing cost can be reduced.

  Next, the 1st exterior member 63 and the 2nd exterior member 64 are joined by corresponding crotch parts, and an individual joined body like FIG. 2 is formed. At this time, the absorbent body 14 is disposed in the central region of the crotch 4. And the waist periphery opening part 10 and a pair of leg periphery opening part 12 are formed by joining side edge parts further, and the underpants type disposable diaper 1 like FIG. 1 can be obtained.

[2-3b] Production of exterior member (Embodiment 2):
Another embodiment will be described. The long sheet body 51 shown in FIG. 4 similar to the above is divided in the longitudinal direction by a half length of the required dimension for forming the circumference of the waist as one cycle, and is divided into two in the width direction. Is divided into a first divided body 61 and a second divided body 62.

  As shown in FIG. 6, the crotch parts of the first divided body 61 and the second divided body 62 are joined to each other. Next, it divides | segments with the 1st division body division line 53 and the 2nd division body division line 54 perpendicular | vertical to the longitudinal direction formed in the predetermined position of the 1st division body 61 and the 2nd division body 62 for every period. Thus, as shown in FIG. 2, the first exterior member 63 that forms the front body and the crotch part, and the second exterior member that forms the crotch part having a shape different from the back body and the crotch part of the first exterior member. An individual joined body joined with 64 is formed. At this time, the absorbent main body 14 is disposed in the central region of the crotch 4.

  Next, by joining the first exterior member 63 and the second exterior member 64 of the individual joined body at the corresponding side edge portions to form one waist circumference opening and a pair of leg circumference openings, A pants-type disposable diaper 1 as shown in FIG. 1 can be obtained.

  As described above, since the first exterior member 63 and the second exterior member 64 are obtained by dividing the long sheet body 51, it is possible to reduce the manufacturing cost without wasting materials. . The crotch part 4 of the first exterior member 63 and the second exterior member 64 are formed in different shapes, specifically, the width of the crotch part 4 of the second exterior member 64 is wider than the crotch part 4 of the first exterior member 63. Thus, the pants-type disposable diaper 1 can be configured such that the front side is clean and the back side is completely covered with the body. In addition, the shape of the front-rear parting line 52 is not limited to the embodiment described above, and can be modified assuming various body shapes of wearers. For example, if the front / rear dividing line 52 is formed in a sine curve shape so that the crotch part 4 of the first exterior member 63 and the crotch part 4 of the second exterior member 64 gradually narrow from the base part to the tip, the joint part 8 By simply changing the joint width, various types of pants-type disposable diapers that fit a wearer of various body types can be easily manufactured.

  The pants-type disposable diaper of the present invention covers a wide area of the wearer's buttocks, has excellent fit, does not leak excrement, and absorbs for infants or adults such as the elderly or disabled persons who need care It can be used as a property article.

It is a schematic perspective view which shows one Embodiment of the underpants type disposable diaper of this invention, and is the figure which shows the state which looked at the underpants type disposable diaper of this invention from the front. It is a top view which shows one Embodiment of the underpants type disposable diaper of this invention, and is the figure which expand | deploys the underpants type disposable diaper shown in FIG. 1, and shows the state seen from the absorptive main body side of the diaper. It is sectional drawing which shows an absorptive main body. It is a figure which shows the dividing line of a elongate sheet body. It is a figure which shows the process divided | segmented into the 1st exterior member and the 2nd exterior member. It is a figure which shows the process divided | segmented and joined to the 1st division body and the 2nd division body.

Explanation of symbols

1: pants-type disposable diaper, 2: front body, 2a, 2b: side edge, 4: crotch, 6: back body, 6a, 6b: side edge, 8: joint, 10: waist opening, 12a, 12b: Leg opening, 14: Absorbent body, 16: Exterior member, 18: Top sheet, 20: Back sheet, 22: Absorber, 42: Elastic material around the waist, 44: Elastic material around the abdomen, 51 : Long sheet body, 52: front and rear parting lines, 53: first part body parting line, 54: second part body parting line, 61: first part body, 62: second part body, 63: first exterior member 64: Second exterior member.

Claims (4)

A long sheet body for forming an exterior member having a mounting function for encapsulating a wearer's body composed of the front body, the crotch part and the back body part,
A front and rear dividing line that is repeated in the longitudinal direction of the length half the required dimension for forming the waist circumference and is divided into two in the width direction;
A widthwise end of the long sheet body formed at a predetermined position of the first divided body divided by the front and rear dividing lines and the front and rear dividing lines and perpendicular to the longitudinal direction. A one-part dividing line;
The second divided body divided by the front and rear dividing lines is formed for each period at a predetermined position shifted from the first divided body dividing line by a half cycle, and the widthwise end of the long sheet body and the front and rear A first exterior member that forms a front body and a crotch part by connecting a parting line and a second divided body parting line perpendicular to the longitudinal direction; and a back part and the crotch part of the first exterior member Forming a second exterior member that forms a crotch part having a different shape from
Manufacture of a pants-type disposable diaper in which the first exterior member and the second exterior member are joined to each other at corresponding side edges and between the crotch parts to form one waist opening and a pair of leg openings. Method. A long sheet body for forming an exterior member having a mounting function for encapsulating a wearer's body composed of the front body, the crotch part and the back body part,
The first divided body and the second divided body are divided by a front and rear dividing line that is repeated in the longitudinal direction of the length half the required dimension for forming the waist circumference and is divided into two in the width direction. Split and
Bonding between the crotch parts of the first divided body and the second divided body,
By dividing by a first divided body dividing line and a second divided body dividing line perpendicular to the longitudinal direction, which are formed every predetermined period at predetermined positions of the first divided body and the second divided body, Forming an individual joined body in which a first exterior member that forms a crotch part and a crotch part and a second exterior member that forms a crotch part having a shape different from the back part and the crotch part of the first exterior member are formed;
A pants-type disposable diaper in which the first exterior member and the second exterior member of the individual joined body are joined together at corresponding side edges to form one waist opening and a pair of leg openings. Production method. In the long sheet body before being divided into two by the front and rear dividing lines,
The first divided body parting line is located in the longitudinal center of the crotch part of the second exterior member,
3. The method for manufacturing a pants-type disposable diaper according to claim 1, wherein the second divided body parting line is located in the longitudinal center of the crotch part of the first exterior member.   The underpants type disposable diaper manufactured by the manufacturing method of the underpants type disposable diaper of any one of Claims 1-3.

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