JP2016159061A - Disposable diaper and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cover surroundings of wearer's legs appropriately as well as avoid generation of trims in the manufacturing process of a disposable diaper.SOLUTION: A disposable diaper includes an absorbent body 10 and side flap members 20 arranged in both width-directional left/right sides of the absorbent body 10, the side flap member 20 has a base end part 21 extending in a longer direction from a front body 1 to a back body 2 and an extension part 22 extending from the base end part 21 outward in the width direction in the front body 1 and the back body 2. The base end part 21 has an overlapping area 21a overlapping in a thickness direction with a side part in the width direction of the absorbent body 10 and is joined to the absorbent body 10 in the overlapping area 21a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a disposable diaper that is attached to a wearer's crotch and absorbs and holds a liquid such as urine. In particular, the present invention relates to a tape-type disposable diaper that is attached to a wearer's crotch using a fastening tape. Moreover, this invention relates to the manufacturing method of a disposable diaper.

  2. Description of the Related Art Conventionally, disposable diapers that are worn on a wearer's inseam are known for the purpose of absorbing and holding excreted body fluids. Disposable diapers include, for example, a pants-type disposable diaper in which both sides of the front body and the back body are joined in advance, or fastening tape tape provided on the back body to the wearer's inseam. There are tape-type disposable diapers to be worn. These pants-type and tape-type disposable diapers generally have leg openings for passing the wearer's legs on both the left and right sides of the crotch. The shape becomes wider.

  In general, when manufacturing a disposable diaper, when forming a leg opening, a step of cutting a portion corresponding to the leg opening is performed on a continuous sheet member constituting the disposable diaper. Is called. For example, Patent Document 1 discloses a tape-type disposable diaper manufactured by such a general method.

  Moreover, in the tape-type disposable diaper, the thing of the structure which attached the side flap member separate from this absorptive main body to each side part of the front body and back body of an absorptive main body is known. For example, Patent Document 2 discloses a tape-type disposable diaper in which an elastic elastic member is disposed on a side flap member on the back body to which a fastening tape is attached.

JP 2009-055996 A JP 2011-160933 A

  However, if a portion corresponding to the leg opening is cut off when forming the leg opening as in a general disposable diaper manufacturing method, a trim that is separated from the main body of the sheet member is generated. . In the manufacturing process of disposable diapers, a large amount of trim is generated. However, since this trim is a target for disposal, there is a problem that material is wasted.

  Moreover, like the tape-type disposable diaper of patent document 2, the part corresponding to a leg opening part in the manufacturing process of a disposable diaper by attaching a side flap member separately to each of the front body and front body of an absorptive main body There is no need to cut off. For this reason, according to the disposable diaper having such a structure, it is considered that occurrence of trim can be avoided. However, when the side flap members are individually attached to the front and back bodies, the joint area between the side flap members and the absorbent main body is small, so the side flap members come off when a large tensile force is applied to the side flap members. There was a problem. In addition, in the structure in which the side flap members are individually attached to the front body and the back body, the wearer's crotch cannot adequately cover the wearer's legs, and urine leaks from the leg opening. There was also a problem.

  Therefore, the present invention can avoid the occurrence of trim in the manufacturing process, and further, can be easily removed from the absorbent main body, and is provided with a side flap member that can appropriately cover the wearer's legs. Providing diapers is a solution issue.

  The inventor of the present invention has intensively studied the means for solving the above problems, and as a result, formed a meandering cutting line on a long sheet member and divided it into two parts, which were divided into the left and right sides of the absorbent main body. It was decided to use it as a side flap member to be attached. Thereby, in the manufacturing process of a disposable diaper, it is not necessary to cut out the site | part corresponded to a leg opening part, and generation | occurrence | production of a trim can be avoided. Furthermore, the inventor decided to attach the left and right side flap members to the absorbent main body over the front body and the back body centering on the crotch. As a result, the side flap member becomes difficult to come off from the absorbent main body, and can appropriately cover the legs of the wearer. Then, the present inventor has conceived that the above problems can be solved based on the above knowledge, and has completed the present invention. If it demonstrates concretely, this invention has the following structures and processes.

The 1st side of the present invention is related with a disposable diaper.
The disposable diaper of the present invention has a longitudinal direction and a width direction. These longitudinal direction and width direction are directions orthogonal to each other in a plane. The disposable diaper has, in its longitudinal direction, a front body 1 positioned on the wearer's stomach, a back body 2 positioned on the back of the wearer, and a crotch positioned between the front body 1 and the back body 2. It is divided into part 3.
The disposable diaper of the present invention includes an absorbent main body 10 and left and right side flap members 20. The absorbent main body 10 is provided from the front body 1 to the back body 2 with the crotch 3 as the center. The side flap member 20 is a separate member from the absorbent main body 10 and is disposed on both the left and right sides of the absorbent main body 10 in the width direction.
The left and right side flap members 20 each have a base end portion 21 and an extension portion 22. The base end portion 21 is a portion extending in the longitudinal direction from the front body 1 to the back body 2. The extension 22 is a portion extending from the base end 21 toward the outer side in the width direction in the front body 1 and the back body 2. For this reason, the side flap member 20 becomes wide in the front body 1 and the back body 2 in which the extension part 22 was formed, and is narrow in the crotch part.
The base end portion 21 of the side flap member 20 has an overlapping region 21 a that overlaps the side portion in the width direction of the absorbent main body 10 in the thickness direction. And this base end part 21 is joined to the absorptive main body 10 in the superimposition area | region 21a.

  As described above, the disposable diaper can be removed without attaching a side flap member 20 which is a separate body to both sides of the absorbent main body 10 in the width direction, without performing the step of cutting out the portion corresponding to the opening around the leg. It can be manufactured. Thereby, it is possible to avoid occurrence of unnecessary trim. Moreover, since the side flap member 20 is attached over the entire longitudinal direction including the crotch part 3 of the absorbent main body 10, the side flap member 20 can appropriately cover the legs of the wearer. it can. Furthermore, by attaching the side flap member 20 over the entire longitudinal direction of the absorbent main body 10, the side flap member 20 becomes difficult to come off from the absorbent main body 10, and the structural strength of the disposable diaper can be increased.

The disposable diaper of the present invention preferably further includes one or a plurality of leg elastic members 30. The leg elastic member 30 is disposed at least on the crotch part 3 on the left and right sides of the absorbent main body 10 in the width direction, and is fixed in a state in which it can expand and contract in the longitudinal direction of the disposable diaper. One or a plurality of leg elastic members 30 can be provided on each of the left and right sides of the absorbent main body 10.
In particular, the leg elastic member 30 is preferably fixed to the overlapping region 21 a of the base end portion 21 of the side flap member 20. That is, the leg elastic member 30 overlaps both the absorbent main body 10 and the side flap member 20. In particular, the leg elastic member 30 is preferably fixed between the absorbent main body 10 and the side flap member 20.

  Like the said structure, the leg elastic member 30 is arrange | positioned in the overlapping area | region 21a which overlaps with the absorptive main body 10 among the side flap members 20, and the elasticity of a longitudinal direction is provided. Thereby, the side flap member 20 and the absorptive main body 10 can be contracted in conjunction with each other, and the gather touch formed by the leg elastic member 30 can be improved. Further, if stretchability is imparted to a region of the side flap member 20 that does not overlap with the absorbent main body 10 (non-overlapping region 21 b), a twist or wrinkle occurs at the joint between the side flap member 20 and the absorbent main body 10. To do. In this case, there is a possibility that the joint strength between the two becomes weak and the side flap member 20 is likely to come off, or that the wearer is uncomfortable. On the other hand, the side flap member 20 and the absorbent main body 10 are integrally contracted by disposing the leg elastic member 30 only in the overlapping region 21a overlapping the absorbent main body 10 in the side flap member 20. Can be made. For this reason, generation | occurrence | production of wrinkles and a wrinkle between the side flap member 20 and the absorptive main body 10 can be prevented, both joint strength can increase, and it can prevent giving a discomfort to a wearer.

  In the disposable diaper of the present invention, each side flap member 20 is formed between the extended portions 22 with the total area of the extended portion 22 on the front body 1 side and the extended portion 22 on the rear body 2 side. It is preferable to be equal to the area of the notch 23.

  When the side flap member 20 is manufactured by making the sum of the areas of the extending portions 22 on the front body 1 side and the back body 2 side coincide with the area of the cutout portion 23 as in the above configuration, a wasteful trim is produced. Can be prevented.

The 2nd side surface of this invention is related with the manufacturing method of a disposable diaper.
In the production method of the present invention, first, a continuous body 110 of a long absorbent main body is obtained (first step). Moreover, the base body 115 of a long side flap member is obtained (2nd process).
Thereafter, a central cutting line C1 extending along the longitudinal direction while meandering at a predetermined period is formed in the central portion of the side flap member base 115 in the width direction, and the side flap member base 115 is divided into right and left. , A left and right side flap member continuum 120 is obtained (third step).
Thereafter, the continuum 120 of the left and right side flap members is attached to the left and right sides in the width direction of the continuum 110 of the absorbent main body (fourth step).
Finally, the absorbent body continuum 110 and the left and right side flap member continuum 120 are cut along the width direction at the same time, and the disposable main body 10 and the left and right side flap members 20 are provided. A diaper 100 is obtained (fifth step).
Here, the continuum 120 of the left and right side flap members extends in the width direction from the base end portion 121 where the central cutting line C1 is formed and the base end portion 121 where the central cutting line C1 is formed. And an extended portion 122 in a state.
And in the 4th process, the base end part 121 of the continuous body 120 of a right-and-left side flap member is piled up on the side part of the width direction of the continuous body 110 of an absorptive main body, and the overlapping area | region 121a is formed. Furthermore, in this superimposition area | region 121a, the continuous body 110 of an absorptive main body and the continuous body 120 of a side flap member on either side are joined.

  As in the above process, the base body 115 of one long side flap member is divided into two on the left and right sides to form the side flap member 20, thereby having a leg opening without causing unnecessary trimming. A disposable diaper can be manufactured.

In the manufacturing method of the present invention, before the fifth step, the continuous body 130 of one or a plurality of leg stretchable members is placed along the longitudinal direction of the continuous body 120 of the left and right side flap members at the portion that becomes the overlapping region 121a. It is preferable to further include a step of fixing in the stretched state.
In this case, in the fifth step, the continuous body 110 of the absorbent main body, the continuous body 120 of the left and right side flap members, and the continuous body 130 of the leg elastic members are simultaneously cut along their width direction. Thereby, the disposable diaper 100 provided with the separate absorptive main body 10, the right and left side flap member 20, and the leg expansion-contraction member 30 can be obtained.

  As described above, the leg stretchable member is formed by disposing the continuum 130 of one or a plurality of leg stretchable members in a portion that becomes the overlapping region 121a of the continuum 120 of the side flap member and the continuum 110 of the absorbent main body. The fixing strength of the continuum 130 can be improved. Further, wrinkles and creases can be prevented from occurring at the joint between the leg stretchable member continuum 130 and the side flap member continuum 120, so that these continuums can be prevented from separating from each other.

The manufacturing method of the present invention includes a step of obtaining a base body 155 of a long functional sheet member before the third step, and a width of the base body 115 of the side flap member. It is preferable to further include a step of attaching to the central portion in the direction.
In this case, in the third step, the central cutting line C1 is formed so as to cross the base body 155 of the functional sheet member at a predetermined period.

  As described above, the functional sheet member base 155 is attached to the central portion in the width direction of the side flap member base 115, and the functional sheet member base 155 and the side flap member base are separated by the center cutting line C1. The body 115 is cut simultaneously. Thereby, the disposable diaper in which the individual functional sheet member 60 is attached to the extending portion 22 of the side flap member 20 can be efficiently manufactured. In addition, the functional sheet member 60 can provide various functions such as cushioning, water absorption, waterproofness, and stretchability to the extending portion 22 of the side flap member 20.

  ADVANTAGE OF THE INVENTION According to this invention, when forming a leg opening part in the manufacturing process of a disposable diaper, it can avoid generating a useless trim. Further, according to the present invention, the left and right side flap members are unlikely to come off from the absorbent main body, and the side flap members can appropriately cover the legs of the wearer.

FIG. 1 is a plan view showing a tape-type disposable diaper according to the first embodiment. FIG. 2 is an explanatory view conceptually showing the structure of a tape-type disposable diaper. FIG. 3 is a sectional view taken along line XX shown in FIG. FIG. 4 is a flowchart showing a manufacturing process of the tape-type disposable diaper according to the first embodiment. FIG. 5 is a plan view showing a tape-type disposable diaper according to the second embodiment. FIG. 6 is a flowchart showing a manufacturing process of a tape-type disposable diaper according to the second embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. This invention is not limited to the form demonstrated below, The thing suitably changed in the range obvious to those skilled in the art from the following forms is also included.

  1 to 3 show a first embodiment of a disposable diaper 100 according to the present invention. The disposable diaper 100 according to the present embodiment is a tape-type disposable diaper. As shown in FIG. 1, the tape-type disposable diaper is a type of disposable diaper that is worn by fastening fastening tapes attached to both sides of the back body to the front body. Below, taking a tape-type disposable diaper as an example, the disposable diaper of the present invention will be described in detail. However, the disposable diaper structure of the present invention can be applied to a pants-type disposable diaper.

  As shown in FIG. 1, the disposable diaper 100 includes a front body 1 that touches the wearer's abdomen, a back body 2 that touches the wearer's back, and a front body 1 and a back body 2 in the longitudinal direction. It is divided into the crotch part 3 which is located and touches the wearer's crotch. The disposable diaper 100 includes an absorbent main body 10 and a pair of left and right side flap members 20 as a basic configuration. In FIG. 1, the side flap member 20 is conceptually hatched.

  The absorbent main body 10 is a member provided from the front body 1 to the back body 2 around the crotch 3. The absorbent main body 10 has a function of absorbing and holding liquid such as urine excreted by the wearer. In this embodiment, the absorptive main body 10 is formed in a substantially rectangular shape. Further, the pair of left and right side flap members 20 are members respectively disposed on the left and right sides of the absorbent main body 10 in the width direction. Each side flap member 20 is provided from the front body 1 to the back body 2 around the crotch 3 and is joined to both sides in the width direction of the absorbent main body 10. In the example shown in FIG. 1, each side flap member 20 has a length in the longitudinal direction substantially the same as that of the absorbent main body 10. The side flap member 20 is a member that forms a leg opening for allowing the wearer's legs to pass through, and covers the circumference and the side of the wearer's leg. Further, a fastening tape 40 is attached to each side flap member 20 on the rear body 2 side. The fastening tape 40 engages with the landing tape 50 attached to the skin non-facing surface (surface not facing the wearer's skin when worn) side of the absorbent main body 10. For this reason, by fastening the fastening tape 40 to the landing tape 50, the tape-type disposable diaper 100 can be mounted on the wearer's body.

  Moreover, as shown in FIG. 2, in the disposable diaper of the present invention, the absorbent main body 10 and the left and right side flap members 20 are separate components. For this reason, the absorptive main body 10 and the side flap member 20 are basically manufactured in separate steps and finally joined and combined.

  First, the configuration of the absorbent main body 10 will be described. As shown in FIG. 3, the absorbent main body 10 includes a top sheet 11, a back sheet 12, and an absorbent body 13 interposed between these sheets 11 and 12. Moreover, the absorptive main body 10 is provided with a pair of side seats 14 on the left and right sides in the width direction. The pair of side sheets 14 form a pair of three-dimensional gathers on both the left and right sides of the absorbent main body 10 in the width direction. In addition, in FIG. 3, in order to show the structure of a disposable diaper easily, each sheet member is given thickness, but each actual sheet member is a very thin member.

  The top sheet 11 constituting the absorbent main body 10 is a member that is in direct contact with the skin of the wearer's crotch and allows liquid such as urine to pass through the absorbent body 13. For this reason, the top sheet 11 is made of a liquid-permeable material having high flexibility. Moreover, the top sheet 11 is arrange | positioned so that the skin opposing surface (surface which opposes a wearer's skin at the time of mounting | wearing) of the absorber 13 may be coat | covered. Examples of the liquid permeable material constituting the top sheet 11 are a woven fabric, a non-woven fabric, or a porous film. Moreover, as the top sheet 11, it is good also as, for example, using the fiber of the thermoplastic resin like polypropylene, polyethylene, polyester, nylon, and making it the nonwoven fabric further, and making it into a nonwoven fabric.

  The back sheet 12 is a member for preventing the liquid that has passed through the top sheet 11 and absorbed by the absorber 13 from leaking to the outside of the diaper. For this reason, the back sheet 12 is made of a liquid-impermeable material. Further, the back sheet 12 covers the non-skin facing surface of the absorber 13 in order to prevent liquid leakage from the bottom surface of the absorber 13. Also, as shown in FIG. 3, the back sheet 12 is formed wider than the top sheet 11, and the left and right ends of the back sheet 12 extend outward from the left and right side edges of the top sheet 11. Preferably it is. An example of the liquid-impermeable material constituting the back sheet 12 is a liquid-impermeable film made of polyethylene resin. In particular, as the back sheet 12, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed in order to ensure air permeability while maintaining liquid impermeability.

  The absorber 13 is a member for absorbing liquid such as urine and holding the absorbed liquid. The absorber 13 is disposed between the liquid-permeable top sheet 11 and the liquid-impermeable back sheet 12. The absorber 13 can be comprised with a well-known absorptive material. As an absorptive material, it is good also as using a fluff pulp, a super absorbent polymer, or a hydrophilic sheet, for example. In addition, as the absorbent material, one kind of fluff pulp, a super absorbent polymer, or a hydrophilic sheet may be used alone, or two or more kinds may be used in combination. The absorbent material is usually used in the form of a single layer or a plurality of layers. As shown in FIG. 3, the top sheet 11 and the back sheet 12 are joined to each other around the absorber 13. As a result, the absorber 13 is surrounded by the joint between the top sheet 11 and the back sheet 12.

  The pair of side sheets 14 is a sheet member that rises along both side edges of the absorber 13 to form a three-dimensional gather that prevents side leakage of urine. For example, as the sheet member constituting the side sheet 14, it is preferable to employ a sheet member having water repellency and air permeability. As the side sheet 14, for example, a non-woven sheet obtained by a method such as card embossing or spunbonding can be used, and it is particularly preferable to use a non-woven sheet such as SMS or SMMS having high waterproofness and air permeability. The side sheet 14 has an outer portion in the width direction bonded to the skin facing surface of the top sheet 11 or the back sheet 12, and an inner portion in the width direction includes a free portion that is not bonded to another sheet. One or a plurality of three-dimensional gather expansion / contraction members 15 are fixed to the free portion in an extended state along the longitudinal direction of the disposable diaper. For this reason, when the three-dimensional gather elastic member 15 contracts, the free portion of the side seat 14 rises toward the wearer's skin and wrinkles occur. As a result, a three-dimensional gather is formed.

  Next, the configuration of the pair of left and right side flap members 20 will be described. As shown in FIGS. 1 to 3, each side flap member 20 is a separate member from the absorbent main body 10 that is attached to both the left and right sides in the width direction of the absorbent main body 10. As shown in FIG. 1, each side flap member 20 is constituted by a sheet member integrated from the front body 1 through the crotch 3 to the back body 2. For this reason, it can be said that each side flap member 20 has a portion corresponding to the front body 1, the back body 2, and the crotch 3, similarly to the absorbent main body 10. Each side flap member 20 is preferably attached to the skin non-facing surface (surface not facing the wearer's skin when worn) side of the absorbent main body 10, but the skin facing surface side (wearing) of the absorbent main body 10. It may be attached to the surface (sometimes facing the wearer's skin).

  The side flap member 20 is configured by one or a plurality of sheet members. As a sheet | seat member which comprises the side flap member 20, a woven fabric, a nonwoven fabric, or a porous film can be used, for example. As the sheet member, for example, a non-woven fabric obtained by hydrophilizing fibers of thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon may be used.

  As shown in FIG. 1, each side flap member 20 extends from the base end portion 21 located on the inner side in the width direction and the base end portion 21 toward the outer side in the width direction in the front body 1 and the back body 2. The extending portion 22 is configured. The base end portion 21 extends from the front body 1 to the back body 2 around the crotch 3 in the entire longitudinal direction of the absorbent main body 10. On the other hand, the extending part 22 is formed only in the front body 1 and the back body 2 and does not exist in the crotch part 3. For this reason, a notch 23 is formed at a portion corresponding to the crotch 3 between the extension 22 on the front body 1 side and the extension 22 on the back body 2. Thus, each side flap member 20 spreads in the width direction in the front body 1 and the back body 2 in which the extension part 22 was formed, and narrowed in the width direction in the crotch part 3 in which the notch part 23 was formed. It can be said that it is a shape. The notch 23 of the side flap member 20 corresponds to a leg opening for allowing the wearer's legs to pass through when the tape-type disposable diaper 100 is worn.

  As shown in FIGS. 1 and 3, the base end portion 21 of each side flap member 20 has an overlapping region 21 a that at least partially overlaps the absorbent main body 10 in the thickness direction. In the overlapping region 21a, each side flap member 20 and the absorbent main body 10 are joined to each other by a hot melt adhesive or the like. In the present embodiment, the side flap member 20 and the absorbent main body 10 have substantially the same length in the longitudinal direction. For this reason, the overlapping region 21 a of the side flap member 20 and the absorbent main body 10 extends over the entire longitudinal direction of the side flap member 20. Note that the side flap member 20 may have the entire base end portion 21 overlapping the absorbent main body 10. However, as in the embodiment shown in FIG. 1, the base end portion 21 of the side flap member 20 has a non-overlapping region 21b that does not overlap the absorbent main body 10 in the thickness direction outside the overlapping region 21a in the width direction. It is preferable. The non-overlapping region 21b of the base end portion 21 comes into contact with the wearer's leg, but the non-overlapping region 21b has a small number of laminated sheet members, and thus gives a soft impression to the wearer. it can. In the present invention, the lateral width (length in the width direction) of the overlapping region 21a is preferably 10 mm or more, or 20 mm or more, and may be 10 mm to 60 mm, or 20 mm to 50 mm. Thereby, the joint strength of each side flap member 20 and the absorptive main body 10 is securable. Further, the lateral width (length in the width direction) of the non-overlapping region 21b may be 2 mm to 15 mm. In this way, by making the width of the non-overlapping region 21b equal to or greater than a certain width, the feel around the legs can be improved.

  Moreover, as FIG.1 and FIG.3 shows, the leg expansion-contraction member 30 extended along the longitudinal direction of a disposable diaper is attached to the base end part 21 of each side flap member 20 one or more each. . The leg elastic member 30 is an elastic elastic member such as rubber thread, and is fixed to each side flap member 20 in an extended state along the longitudinal direction of the disposable diaper. The leg elastic member 30 is located at least in the crotch part 3 and may be disposed so as to reach the front body 1 and the back body 2 beyond the crotch part 3. The leg elastic member 30 is located around the leg opening (notch 23) of each side flap member 20. For this reason, when the leg expansion / contraction member 30 contracts, a leg gather is formed around the leg opening. By forming a leg gather around the wearer's leg, urine leakage from the leg opening can be effectively prevented.

  Further, as shown in FIGS. 1 and 3, each leg elastic member 30 is attached to the overlapping region 21 a overlapping the absorbent main body 10 in the base end portion 21 of the side flap member 20. Specifically, as shown in FIG. 3, the leg elastic members 30 are preferably fixed so as to be sandwiched between the leg elastic members 30 and the absorbent main body 10. Thus, the leg elastic member 30 is disposed in the overlapping region 21a of the side flap member 20 to provide the longitudinal elasticity. Thereby, the side flap member 20 and the absorptive main body 10 can be contracted in conjunction with each other, and the feel of the leg gathers formed by the leg elastic members 30 can be improved.

  Moreover, in this embodiment, each leg expansion-contraction member 30 is not arrange | positioned among the base end parts 21 of the side flap member 20 in the non-overlapping area | region 21b which does not overlap with the absorptive main body 10. FIG. Thus, it is preferable that the leg elastic member 30 is attached only to the overlapping region 21a. If stretchability is imparted to the non-overlapping region 21 b that does not overlap the absorbent main body 10 among the side flap members 20, twists and wrinkles occur at the joint between the side flap member 20 and the absorbent main body 10. In this case, there is a possibility that the joint strength between the two becomes weak and the side flap member 20 is likely to come off, or that the wearer is uncomfortable. On the other hand, the side flap member 20 and the absorbent main body 10 are integrally contracted by disposing the leg elastic member 30 only in the overlapping region 21a overlapping the absorbent main body 10 in the side flap member 20. Can be made. For this reason, generation | occurrence | production of wrinkles and a wrinkle between the side flap member 20 and the absorptive main body 10 can be prevented, both joint strength can increase, and it can prevent giving a discomfort to a wearer.

  In the embodiment shown in FIG. 3, each side flap member 20 is constituted by a single sheet member such as a non-woven fabric. However, each side flap member 20 may have a multilayer structure in which a plurality of sheet members are stacked and joined. For example, each side flap member 20 may have a configuration in which two or three layers of sheet members are stacked.

  Then, with reference to FIG. 4, the manufacturing method of the disposable diaper 100 which concerns on 1st Embodiment mentioned above is demonstrated. As shown in FIG. 4, a continuous body 110 of an elongated absorbent body is manufactured according to a known method. This continuous body 110 of an absorptive main body is a structure in which the absorptive main body 10 described above is continuous in the longitudinal direction of the disposable diaper. The longitudinal direction of the continuous body 110 of the long absorbent body coincides with the transport direction when manufacturing the disposable diaper.

  Further, as shown in FIG. 4, a base body 115 of a long side flap member is prepared. The base body 115 of the long side flap member is a material that becomes the side flap member 20 described above by cutting individually. The longitudinal direction of the main body 115 of the side flap member coincides with the transport direction when manufacturing the disposable diaper.

  Next, a central cutting line C1 is formed for the base body 115 of the side flap member. The center cutting line C1 is a cutting line formed at the center in the width direction of the base body 115 of the side flap member, and the base body 115 of the side flap member is divided into two to obtain a continuum 120 of left and right side flap members. Is for. As shown in FIG. 4, the central cutting line C <b> 1 is formed in a wavy shape that meanders (bends or curves) at a predetermined period in the width direction of the original body 115 of the side flap member. The left and right side flap member continuums 120 are each divided into a base end portion 121 and an extension portion 122. The base end portion 121 is a portion where the central cutting line C1 is not formed over the entire lengthwise direction of the continuous body 120 of side flap members. The extending part 122 is a part that extends in the width direction from the base end part 121 by forming a central cutting line C1 meandering from side to side.

  The leg stretchable member continuum 130 is attached to the base end 121 of the side flap member continuum 120. The leg stretchable member continuous body 130 is a material that becomes the leg stretchable member 30 by being individually cut later. As shown in FIG. 4, the leg stretch member continuum 130 is arranged so as to extend along the flow direction of the side flap member continuum 120, and this continuous state is applied in a state where a certain tension is applied. Fixed to the proximal end 121 of the body 120. Further, when the leg stretchable member continuous body 130 is fixed, an adhesive is intermittently applied to the leg stretchable member continuous body 130 in the longitudinal direction. That is, the adhesive is applied so that the adhesive application portion and the adhesive non-application portion are alternately continued in the longitudinal direction of the leg stretchable member continuous body 130. At this time, the adhesive is applied to the part corresponding to the crotch part 3 of the final disposable diaper (adhesive application part), and is not applied to the part corresponding to the front body 1 side and the back body 2 side of the disposable diaper ( Adhesive non-applied part).

  Next, the position of the continuum 120 of the left and right side flap members is changed. That is, in the first stage in which the central cutting line C1 is formed, the continuum 120 of the left and right side flap members is in a state in which the extension part 122 is located on the inner side and the base end part 121 is located on the outer side. Yes. Therefore, these positional relationships are exchanged so that the base end portion 121 is located on the inner side and the extending portion 122 is located on the outer side.

  Next, the left and right side flap member continuums 120 whose positions have been switched are fixed to the left and right sides of the absorbent body continuum 110 in the width direction. At this time, in the part corresponding to the front body 1 and the back body 2 when the extension part 122 of the continuous body 120 of the side flap member becomes the individual absorbent body 10 in the continuous body 110 of the absorbent body. Fix so that it is positioned. Thereby, the narrow site | part which does not have the extension part 122 among the continuous bodies 120 of a side flap member comes to be located in the crotch part 3 when it becomes the individual absorptive main body 10. FIG. Further, the base end portion 121 of the absorbent body continuum 110 is fixed in a superimposed manner on the side portion of the side flap member continuum 120. Thereby, the overlapping region 121a of the continuous body 110 of the absorbent main body and the continuous body 120 of the side flap member is formed. Furthermore, when fixing the continuous body 110 of an absorptive main body and the continuous body 120 of a side flap member, it is preferable to position the continuous body 130 of a leg expansion-contraction member in these superimposition area | regions 121a. In particular, it is preferable that the leg stretchable member continuum 130 is sandwiched between the absorbent main body continuum 110 and the side flap member continuum 120.

  Finally, the continuous body 110 of the absorbent main body fixed to each other and the extending portion 122 of the continuous body 120 of the left and right side flap members are cut along the individual cutting lines C2 along the width direction thereof. At this time, the individual cutting line C2 is formed between the absorbent bodies 11 arranged in the continuous body 110 of the absorbent main body. The individual cutting line C2 cuts the leg stretch member continuous body 130 simultaneously with the absorbent body continuous body 110 and the left and right side flap member continuous bodies 120. The leg stretchable member continuous body 130 is cut at an adhesive non-applied portion where no adhesive is applied. For this reason, the tension | tensile_strength of the continuous body 130 of a leg expansion / contraction member is cancelled | released, and the individual leg expansion / contraction member 30 will remain only in the adhesive agent application part to which the adhesive agent is apply | coated. Thus, the disposable diaper 100 provided with the separate absorptive main body 10, the left and right side flap members 20, and the leg elastic member 30 is obtained. This disposable diaper 100 has basically the same structure as the disposable diaper described with reference to FIGS.

  By manufacturing the disposable diaper 100 according to the process shown in FIG. 4, the trim that has been cut out to form the leg opening of the disposable diaper 100 does not occur. That is, a disposable diaper can be manufactured without attaching a side flap member 20 that is a separate body to both sides of the absorbent main body 10 in the width direction, without performing a step of cutting out the portion corresponding to the opening around the leg. Is possible. Thereby, it is possible to avoid occurrence of unnecessary trim.

  Then, with reference to FIG.5 and FIG.6, the disposable diaper which concerns on the 2nd Embodiment of this invention, and its manufacturing method are demonstrated. The second embodiment will be described with a focus on the differences from the first embodiment described above, and the description of the same points as the first embodiment will be omitted.

  FIG. 5 is a plan view showing a disposable diaper 100 according to the second embodiment. As shown in FIG. 5, in the second embodiment, the disposable diaper 100 includes a functional sheet member 60 in the extending portion 22 of the left and right side flap members 20. The functional sheet member 60 is preferably disposed on the skin facing surface side of the extending portion 22, but may be disposed on the skin non-facing surface side. Moreover, it is preferable that the functional sheet | seat member 60 is settled in the range of the extension part 22, and is attached. In other words, the functional sheet member 60 has a shape and an arrangement that does not protrude from the extending portion 22. In addition, as shown in FIG. 5, the functional sheet member 60 is preferably disposed over the entire region of the extending portion 22 in the longitudinal direction of the disposable diaper. That is, in the longitudinal direction of the disposable diaper, both ends of the functional sheet member 60 and both ends of the extending portion 22 are coincident.

  As the functional sheet member 60, for example, a sheet member that provides various functions such as cushioning properties, liquid absorbability, waterproofness, stretchability, etc., to the extending portion 22 of the side flap member 20 may be employed. it can. For example, in order to impart cushioning properties to the extending portion 22, a thick nonwoven fabric or the like may be employed as the functional sheet member 60. In addition, in order to impart liquid absorbability to the extending portion 22, a liquid absorbent non-woven fabric or the like may be employed as the functional sheet member 60. Further, in order to impart waterproofness to the extending portion 22, a liquid-impermeable nonwoven fabric or the like may be employed as the functional sheet member 60. Furthermore, in order to impart stretchability to the extending portion 22, a stretchable sheet that stretches in the longitudinal direction or the width direction of the disposable diaper may be employed as the functional sheet member 60. In addition, various sheet members can be adopted as the functional sheet member 60. Thus, the disposable diaper suitable for a wearer's request can be provided by providing the functional sheet member 60 in the extension part 22 of this side flap member 20.

  FIG. 6 is a flowchart showing a manufacturing process of the disposable diaper 100 according to the second embodiment. The manufacturing process of the second embodiment is basically the same as the manufacturing process of the first embodiment (see FIG. 4). However, the process of attaching the functional sheet member 60 to the left and right side flap members 20 is added to the manufacturing process of the second embodiment.

  As shown in FIG. 6, first, an original body 115 of a long side flap member is prepared. Thereafter, a base body 155 of a long functional sheet member is fixed to a central portion in the width direction of the base body 115 of the side flap member. The base body 155 of the functional sheet member is a member that finally becomes the functional sheet member 60 shown in FIG. 5 by cutting individually. The functional sheet member base 155 is preferably attached to the skin facing surface side of the side flap member base 115, but may be attached to the skin non-facing surface side.

  Thereafter, when the central cutting line C1 is formed on the side flap member base 115, the functional sheet member base 155 is cut by the central cutting line C1. As shown in FIG. 6, the central cutting line C <b> 1 meanders so as to traverse the functional sheet member base 155 at a predetermined period. That is, the functional sheet member base 155 is divided in the width direction by the meandering central cutting line C1 to form a functional sheet member continuous body 160. The functional sheet member continuum 160 is obtained by connecting two individual functional sheet members 60 shown in FIG. 5 in the longitudinal direction. Thereafter, the side flap member continuum 120 provided with the functional sheet member continuum 160 is attached to the absorbent body continuum 110. Finally, the continuous body 110 of the absorbent main body and the continuous body 120 of the side flap member, as well as the continuous body 160 of the functional sheet member are cut by the individual cutting line C2 extending along the width direction of each continuous body. . Thereby, the disposable diaper 100 containing the separate absorptive main body 10, the right and left side flap member 20, and the functional sheet member 60 can be obtained.

  Thus, in 2nd Embodiment, after attaching the base body 155 of a functional sheet member to the base body 115 of a side flap member, the center cutting line C1 is formed. Accordingly, it is possible to separate the base body 155 of the functional sheet member at the same time that the base body 115 of the side flap member is divided into two in the width direction. Therefore, the trouble of attaching the individual functional sheet members 60 to the extending portions 22 of the side flap members 20 of the disposable diaper 100 can be saved. As a result, the disposable diaper 100 including the functional sheet member 60 can be efficiently manufactured.

  As mentioned above, in this specification, in order to express the content of this invention, embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  The present invention relates to a disposable diaper and a manufacturing method thereof. Therefore, this invention can be utilized suitably in the manufacturing industry of a disposable diaper.

DESCRIPTION OF SYMBOLS 1 ... Front body 2 ... Back body 3 ... Crotch part 10 ... Absorbent main body 11 ... Top sheet 12 ... Back sheet 13 ... Absorber 14 ... Side sheet 15 ... Solid gathering elastic member 20 ... Side flap member 21 ... Base end part 21a ... Overlapping area 22b ... Non-overlapping area 22 ... Extension part 23 ... Notch part 30 ... Leg elastic member 40 ... Fastening tape 50 ... Landing tape 60 ... Functional sheet member 100 ... Disposable diaper 110 ... Continuous body of absorbent main body 115 ... Side flap member base 120 ... Side flap member continuum 121 ... Base end portion 121a ... Overlapping region 122 ... Extension portion 130 ... Leg stretchable member continuum 160 ... Functional sheet member continuum

Claims (6)

Having a longitudinal direction and a width direction;
Between the front body (1) located on the stomach side of the wearer, the back body (2) located on the back side of the wearer, and the front body (1) and the back body (2) in the longitudinal direction Disposable diapers divided into the crotch (3) located in
An absorbent main body (10) provided from the front body (1) to the back body (2);
A side flap member (20) separate from the absorbent main body (10) disposed on the left and right sides of the absorbent main body (10) in the width direction;
The side flap members (20) are respectively
A proximal end (21) extending in the longitudinal direction from the front body (1) to the back body (2);
In the front body (1) and the back body (2), an extended portion (22) extending from the base end portion (21) toward the outside in the width direction,
The base end (21)
Having an overlapping region (21a) that overlaps the widthwise side of the absorbent body (10) in the thickness direction;
The disposable diaper joined to the said absorptive main body (10) in the said superimposition area | region (21a). A leg stretchable member (30) that can be stretched and contracted in the longitudinal direction, disposed at least on the crotch portion (3) of the absorbent main body (10) on both the left and right sides in the width direction;
The disposable diaper according to claim 1, wherein the leg elastic member (30) is fixed to the overlapping region (21a) of the base end portion (21) of the side flap member (20). The side flap member (20)
The total area of the extension part (22) on the front body (1) side and the extension part (22) on the back body (2) side is formed between the extension parts (22). The disposable diaper according to claim 1 or 2, wherein the area is equal to the area of the notch (23). A method for manufacturing disposable diapers,
A first step of obtaining a continuous body (110) of an elongated absorbent body;
A second step of obtaining an elongated body (115) of side flap members;
A central cutting line (C1) extending along the longitudinal direction while meandering at a predetermined period is formed at the center in the width direction of the original body of the side flap member (115), and the original body of the side flap member (115) A third step of dividing the left and right sides to obtain a continuous body (120) of the left and right side flap members;
A fourth step of attaching the continuum (120) of the left and right side flap members to both left and right sides in the width direction of the continuum (110) of the absorbent main body;
The absorbent body continuum (110) and the left and right side flap member continuum (120) are simultaneously cut along the width direction of the absorbent body (10) and the left and right side flaps. A fifth step of obtaining a disposable diaper (100) comprising a member (20),
The continuum (120) of the left and right side flap members is:
A base end (121) where the central cutting line (C1) is not formed;
An extension portion (122) that extends in the width direction from the base end portion (121) by forming the central cutting line (C1),
In the fourth step,
The base end portion (121) of the continuum (120) of the left and right side flap members is overlapped with the side part in the width direction of the continuum (110) of the absorbent main body to form a superimposed region (121a),
The manufacturing method of the disposable diaper which joins the continuous body (110) of the said absorptive main body, and the continuous body (120) of the said right and left side flap member in the said superimposition area | region (122a). Prior to the fifth step, one or a plurality of leg stretchable member continuums (130) are placed in the overlapping region (121a) in the longitudinal direction of the left and right side flap member continuums (120). Further comprising the step of fixing in an extended state along
In the fifth step, the absorbent body continuum (110), the left and right side flap member continuum (120), and the leg stretchable member continuum (130) are simultaneously moved along their width direction. The manufacturing method of the disposable diaper of Claim 4 which cut | disconnects and obtains a disposable diaper (100) provided with an individual absorptive main body (10), a left and right side flap member (20), and a leg elastic member (30). Prior to the third step,
Obtaining an original body (160) of a long functional sheet member;
Attaching the original sheet (160) of the functional sheet member to the central portion in the width direction of the original body (115) of the side flap member,
The disposable diaper according to claim 4 or 5, wherein, in the third step, the central cutting line (C1) is formed so as to cross the original body (160) of the functional sheet member at a predetermined period. Production method.

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