JP2005296603A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a developing type disposable diaper which has superior wearing and fitting performance for a wearer of any body shape and which is especially excellent in prevention of leaking from around legs. <P>SOLUTION: In this developing type disposable diaper in which a fastening tape with a hook member of a mechanical fastener is placed on both edge parts of the back body part of this diaper body and a target zone comprising a member engageable with the hook member is formed in the front body part, The fastening tape is equipped with the mechanical fastener hook member set on one surface in one end part of a band shape substrate sheet and the target zone comprising the member engageable with the hook member set on the other surface, and is stuck on and fixed to the diaper body at the other end part area of the band shape substrate sheet. One end part area of the band shape substrate sheet is folded back on the substrate sheet with the hook member inside thereof and then is further folded back on the body with the folded back end part area inside thereof and, in that condition, temporarily fastened to the diaper body in at least one joining part by a joining means when it is not used. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disposable diaper having a fastening tape, and more particularly, to a deployable disposable diaper having a fastening tape provided with a hook material of a mechanical fastener.

  Disposable diapers are basically formed from a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between these two sheets, and excreted urine excreted when worn. It is structured to hold the substance on the absorbent body via a liquid-permeable top sheet and prevent the excrement from leaking out of the diaper by the liquid-impermeable back sheet, suitable for its use Various types such as a deployment type and a pants type have been proposed so that they can be used for a wide range of uses, including infants and other adult incontinents.

  In general, a disposable disposable diaper has a fastening tape placed on the left and right edges of the back body, and a target zone consisting of a front tape for removably engaging the fastening tape on the back sheet surface of the front body. The diaper is attached to the wearer by joining the fastening tape to the front tape. Fastening tapes of such unfolded disposable diapers are usually attached to the left and right, one by one or more. The former is often used for disposable diapers for newborns and infants, and the latter is used for disposable diapers for adults. Many are seen.

  In conventional unfolded disposable diapers, when a plurality of fastening tapes are attached to both side edges of the back body, they are all attached at right angles to the longitudinal direction of the diaper. Therefore, when wearing a diaper, the fastening tape attached to the waist circumference side is fastened to fit the user's body with the joint between the back and front of the diaper that is substantially perpendicular to the longitudinal direction. However, if the fastening tape attached to the leg circumference side is pulled and fastened in the arrangement direction as it is, the fitting property around the wearer's leg is insufficient, and the fastening tape is placed between the diaper and the wearer's body. A gap was likely to occur.

  Especially for a wearer who has been sleeping for a long time, the waist and legs are often thin and the fastening tape is used to fasten the diaper to such a wearer. Then, it is necessary to pull the fastening tape on the leg circumference side in a different angle from the mounting direction, that is, slightly upward, but if the fastening tape is arranged at right angles to the diaper longitudinal direction, It was difficult to be pulled and fastened, and as a result, a gap was easily generated between the wearer and the diaper, which was likely to leak.

  In addition, if the diaper cannot be securely attached to the wearer in this way, it may be caused by the downward force generated when the wearer walks or changes his / her posture while using the diaper, or receives a load of excrement. The diaper would easily sag or slip off the wearer's body, contributing to early leakage.

  Various proposals have been made to solve these problems. For example, a disposable diaper (Patent Document 1) in which two fastening tapes are disposed on both side edges of the back body and both of them are disposed downward. There has been proposed a disposable diaper (Patent Document 2) in which a fastening tape positioned on the leg opening side is attached obliquely with an angle of up to 45 degrees upward with respect to the diaper horizontal axis direction. In addition, two fastening means are attached to the side edges of the left and right side flaps of the back body, and slits are formed in the side flaps between the fastening means in the lateral direction or inseam direction so as to fit the wearer. Disposable diapers (patent document 3, patent document 4) which aimed at the improvement of, and disposable diapers which attached wings to both side edges of the back body of the diaper, and formed the engaging means in each of the wings (patent Document 5) has been proposed.

These conventional disposable disposable diapers with two fastening tapes attached to one side edge of the conventional diaper are used to pull the fastening tape in the direction in which the diaper is in close contact with the wearer's body. It is fixed to the target zone such as the front tape.
However, depending on the wearer's body shape, it may be necessary to pull the fastening tape in the direction in which the other fastening tape overlaps the other fastening tape around the waist and legs. In a diaper, there is no target zone for fixing the fastening means on the surface opposite to the surface on which the fastening means of the fastening tape is provided. Since the other fastening tape could not be fixed, the diaper could not be fitted enough to the wearer.

Moreover, the disposable diaper which has a fastening tape of the laminated structure which provided the hook material in one surface of the base material sheet, and provided the loop material (target zone) which can be engaged with a hook material on the other surface (patent document 6) is also provided. Proposed.
However, when a disposable disposable diaper is normally not used, the fastening tape is folded back onto the diaper and temporarily fixed. Therefore, when a fastening tape provided with such a hook material and a loop material is used, Since it has a laminated structure, it becomes heavy and the tape cannot be sufficiently temporarily fixed to the diaper main body, which may cause troubles in the manufacturing process of the diaper, as will be described later.

  Furthermore, in the case of the fastening tape as described above, the loop material is bonded and fixed onto the base sheet with an adhesive. Since troubles often occur in subsequent manufacturing processes due to the protrusion or oozing of the agent, an adhesive method is usually adopted in which a non-adhesive part is formed between the base sheet and the edge region. ing. However, in the case of a disposable diaper of the type in which the fastening tapes are bonded to each other, if there are many non-bonded portions of such a loop material, not only the appearance of the product is impaired, but also the fastening tapes are stretched and bonded together. For this reason, when a strong tensile force is applied to the overlapping joints between the fastening tapes due to the movement of the wearer's body, the non-adhered part of the loop material acts like a knob and is easily peeled off from the base sheet. Thus, the function of the fastening tape is deteriorated.

  In addition, such a combination of the fastening tape and the front tape includes a combination of a fastening tape having an adhesive layer and a front tape made of various films, and a fastening tape having a hook material of a mechanical fastener and a hook material. A combination of front tapes made of compatible loop materials is known. However, if the fastening tape using an adhesive is accidentally adhered to a place other than the front tape when the diaper is attached, or if dirt adheres to the surface of the adhesive layer, the adhesive strength of the tape Has a problem that it cannot be reused. Therefore, recently, a fastening tape having a hook material has become mainstream.

  Furthermore, when attaching the fastening tape to the diaper main body in the manufacturing process, since a part of the fastening tape is attached in a state extending from the side edge of the diaper main body, if it is left as it is, the fastening tape is used in the subsequent manufacturing process. It gets caught in the production facility and smooth production is not possible. For this reason, a method of temporarily fastening the fastening tape on the diaper main body is performed.

  In the case of a fastening tape having a hook material, the fastening tape is folded over the diaper main body, and the hook material is temporarily fixed by engaging with a top sheet made of nonwoven fabric, but the engagement force may not be sufficient. As a result, the fastening tape may come off from the diaper body during the manufacturing process, and smooth manufacture may not be possible. Therefore, as a method of temporarily fastening the fastening tape having a hook material to the diaper body, a method of temporarily fastening the fastening tape to the diaper body using an adhesive for temporary fastening (Patent Document 7, Patent Document 8), Fastening Tape or Diaper A method of forming a top sheet of a main body from a heat-meltable material and temporarily fastening the fastening tape and the diaper main body by heat melting (Patent Documents 9 and 10), embossing a hook material of the fastening tape and a side flap of the diaper main body A method of temporarily fixing by processing (Patent Document 11), a method of temporarily fixing by forming a hole penetrating the fastening tape and the side flap of the diaper body (Patent Document 12), and the like are disclosed.

  However, in any of the temporary fixing methods as described above, the hook material of the fastening tape is directly engaged with the top sheet made of the nonwoven fabric of the diaper main body and temporarily fixed, so the top sheet is removed when the hook material is removed. In some cases, the quality of the product may be deteriorated by scratching or tearing.

In addition, in the case of a large diaper such as an adult diaper, it is necessary to attach a large fastening tape to make the diaper easy to wear. Part of the diaper will be located near the center of the diaper, and the hook material will be hidden behind the wearer's buttocks when wearing the diaper. For adults with physical disabilities, wearing diapers has been a heavy burden for caregivers. Furthermore, when packaging product diapers in packaging bags, the diapers are folded and wrapped, but with the temporary fastening method as described above, when the diaper is folded, it is folded at the hook material, and when the diaper is attached In some cases, the fastening tape did not work well.
Japanese Utility Model Publication 53-110035 Japanese Utility Model Publication No. 6-31726 Japanese Patent Laid-Open No. 62-268802 JP 7-227403 A JP-A-11-99178 Japanese Patent No. 1-156502 JP-A 63-309606 JP-A-1-61501 Japanese Patent Laid-Open No. 10-24066 JP 2002-45393 A JP 2002-647 A JP 2003-153949 A

The present invention solves the problems of the conventional disposable diapers described above, and provides a disposable diaper that is excellent in wearability and fitability for a wearer of any body shape, and particularly excellent in preventing leakage from around the legs. There is to do.
In addition, the present invention overcomes the problems of the disposable diaper temporarily fastening the fastening tape having the conventional hook material, and can be easily mounted in a short time without deteriorating the product quality. The present invention provides a disposable diaper in which the function of the fastening tape is not impaired in the mounted state.

  The present invention for solving the problems of the conventional disposable diapers includes the following inventions.

(1) A hook material of a mechanical fastener is provided on both side edges of the back of the diaper body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the two sheets. In a disposable diaper in which a fastening tape is disposed and a target zone made of a member that can be engaged with the hook material is formed in the front body of the diaper main body,
The fastening tape is formed by disposing the hook material of the mechanical fastener on one surface in one end region of the belt-shaped base sheet, and the other end region of the strip-shaped base sheet is It is bonded and fixed to the diaper body,
When the diaper is not used, the fastening tape is folded on the base material sheet with one end region where the hook material of the belt-like base material sheet is disposed on the base material sheet, and then folded. Further, the disposable diaper is further folded on the diaper main body with the end region inside, and in that state, at least one joint portion is temporarily fixed to the diaper main body by the joining means.

(2) The fastening tape is provided with a target zone made of a member that can engage with the hook material on a surface opposite to the surface on which the hook material of the belt-shaped base sheet is disposed. The disposable diaper described in (1).

(3) The target zone of the fastening tape is adhesively fixed to the base sheet so that the length of the non-adhesive portion not bonded to the base sheet at the end of the diaper main body side is 10 mm or less. The disposable diaper according to item (2), characterized in that

(4) The target zone provided on the fastening tape is formed by adhering and fixing a member that can be engaged with a hook material of the mechanical fastener onto the band-shaped base sheet, and the target zone At least the end region on the diaper main body side is bonded and fixed to the belt-like substrate sheet by at least one kind of heat-sealing treatment selected from heat sealing, ultrasonic bonding and hot embossing (2 ) Or disposable diaper according to item (3).

(5) The target zone provided on the fastening tape is provided to at least the vicinity of the diaper main body side end of the base sheet on the surface of the base sheet opposite to the surface on which the hook material is provided. The disposable diaper according to any one of (2) to (4), wherein the diaper main body side end region is bonded and fixed to the diaper main body integrally with the base sheet.

(6) The said target zone provided in the said fastening tape is provided in the area of 30% or more of the area of the base-material sheet | seat part extended from the diaper main body. The disposable diaper according to any one of items 5).

(7) The target zone provided on the fastening tape and the hook material of the mechanical fastener have a peel strength of 0.03 to 4.0 N / 100 mm ² when measured under the following measurement conditions (area of engagement portion) The disposable diaper according to any one of items (2) to (6), which is characterized in that
Measurement condition:
A member that forms a target zone on a plastic plate is fixed so that the target zone faces upward, and then a hook material portion of a fastening tape having a width of 20 to 60 mm is overlaid on the target zone to obtain a length of 60 mm. Using a roller with a weight of 1 kg, reciprocating the fastening tape surface at a speed of 5 mm / sec, pressing the hook material against the target zone and temporarily fixing it, then using the corners of the table as shown in FIG. Then, a weight of 1 kg is attached to the end of the fastening tape for 2 seconds, a load is applied in the direction in which the fastening tape is pulled, and the hook material and the target zone are engaged.
Next, using a Tensilon tensile tester, a plastic plate is fixed to one chuck, and the end of the fastening tape is fixed to the other chuck. Under the conditions of a distance between chucks of 50 mm and a tensile speed of 300 mm / min, The fastening tape is peeled off by pulling the end in a direction perpendicular to the surface of the target zone, and the 90-degree peel strength is measured. After the obtained measured value is divided by the area of the engagement portion between the target zone and the hook material, a value per 100 mm ² of the area of the engagement portion is calculated to obtain the peel strength.

(8) When the fastening tape is not used in a diaper, one end region where the hook material of the belt-like base material sheet is arranged is folded back on the belt-like base material sheet with the hook material inside. The folded back end region is turned inside and further folded onto the diaper main body, and in this state, the back surface of the folded back end region and / or the back surface of the end region does not exist. The disposable diaper according to any one of items (1) to (7), wherein the disposable diaper is temporarily fixed on the diaper main body by a joining means provided on the material sheet.

(9) When the fastening tape is not used in a diaper, one end region where the hook material of the belt-like base material sheet is arranged is folded back on the base material sheet with the hook material inside, and the state The disposable diaper according to any one of items (1) to (8), wherein the hook member is temporarily fixed by a joining means provided on a base sheet surface facing the hook material.

(10) The fastening tape is formed such that one end region where the hook material of the belt-shaped base sheet is disposed is narrower than the other base sheet portion, and when the diaper is not used, One end region of the belt-like base material sheet is folded on the base material sheet with the hook material on the inside, and further folded on the diaper main body with the folded end region on the inside, and in this state, the base material The hook material is temporarily fixed to the base material sheet by the joining means provided in the entire width direction of the base material sheet at a position where the hook material faces on the sheet, and the folded base material sheet is The disposable diaper according to any one of items (1) to (9), characterized in that it is temporarily fixed to the diaper main body in a portion where there is no end region outside both side edges of the partial region.

(11) The disposable diaper according to any one of (2) to (10), wherein the target zone provided on the fastening tape is formed of a nonwoven fabric.

(12) The disposable target according to any one of (2) to (10), wherein the target zone provided on the fastening tape is formed of a laminate of a woven fabric and a film. Diapers.

(13) The bonding means for temporary fixing includes at least one of an adhesive, a heat melting process, and an embossing process, and any one of the items (1) to (12) Disposable diapers described in 1.

(14) At least 2 fastening tapes are arrange | positioned at each side edge part of the back body of the said diaper main body, Any one of (1)-(13) term | claim characterized by the above-mentioned. Disposable diapers.

The disposable diaper of the present invention is provided with a base material sheet on both side edges of the back body, a hook material of a mechanical fastener provided on one surface of the base material sheet, and a target that can be engaged with the hook material on the other surface. Fastening tape formed with a zone is arranged, and the fastening tape has a base sheet so that the length of the non-adhesive portion in the end region on the diaper main body side is 10 mm or less. It is fixed to the adhesive.
The above-mentioned fastening tape is arranged such that the sheet body forming the target zone is extended so that its end extends to the end of the base sheet or the vicinity thereof, and is laminated and adhered to the base sheet. The length of the non-adhesive portion of the target zone end region may be made substantially zero by adhesively fixing the fastening tape end portion to the diaper body.
Furthermore, in the disposable diaper of the present invention, the fastening tape is folded back with the hook material inside when the diaper is not used, and is temporarily fixed on the diaper main body by the joining means.

  When the disposable diaper of the present invention having such a configuration is used to pull the fastening tape on both side edges of the back body to closely adhere the diaper to the wearer's body, even if the direction in which the fastening tape overlaps the fastening tape, Fastening tape can be firmly fixed, so it can fit well to any body shape wearer, and the diaper can be placed on the wearer's body by pulling the fastening tape and overlapping each other. When the adhesive zone is in close contact, a force is applied to the target zone of the fastening tape to peel off the diaper body side end, but the target zone peels off due to sufficient bonding strength in the target zone end region. Does not degrade the function.

In the case of the present invention, the hook material and the target zone provided on the fastening tape preferably have a peel strength of 0.03 to 4.0 N / 100 mm ² (area of engagement portion) when measured under the conditions described later. . When the peel strength is within this range, the re-adhesion and re-peeling of the fastening tapes are easy, and the fastening tapes can be firmly fixed.

  In particular, in the case of a disposable diaper for adults in which two fastening tapes are arranged on each side edge of the back body, it is possible to fit both the waist circumference and leg circumference well, and the back side of the thigh Since there is no gap from the side to the side, the diaper can be easily fitted around the legs, leakage from the legs is prevented, and the burden on the caregiver and the cared person can be reduced.

  Furthermore, the disposable diaper of the present invention does not damage or tear the top sheet when the fastening tape is pulled out because the hook material does not contact the top sheet of the diaper body when the fastening tape is temporarily fixed. , Do not degrade the product quality. In addition, the fastening tape is temporarily fixed in the vicinity of both side edges of the diaper body and can be easily pulled out without being hidden by the wearer's body, so that the diaper can be easily attached in a short time. is there. Further, when the diaper is folded and packaged, the hook material portion is not folded, so that the function of the fastening tape does not deteriorate when the diaper is worn. Moreover, when manufacturing a diaper, since a fastening tape does not remove | deviate in a manufacturing process, it is possible to improve productivity.

  In the case of the disposable diaper of the present invention, the fastening tape folded on the diaper body is between the part of the base sheet excluding the part where the hook material is folded and the diaper body, or the hook material folded. It is preferable to temporarily fix between the back part of the diaper and the diaper main body or both by the joining means, and by temporarily fixing the fastening tape in this way, the disposable diaper of the present invention having the above effects can be more stable. Can get to.

  Furthermore, it is preferable that the fastening tape is temporarily fixed between the folded hook material and the base sheet by a joining means, and the above effect is obtained by temporarily fixing the fastening tape in this way. The disposable diaper of this invention which has can be obtained more stably.

  In the fastening tape, the hook material is formed to be narrower than the base material sheet, and when the diaper is not used, the hook material portion is on the base material sheet with the hook material inside. And the base sheet is folded back on the diaper main body with the hook material folded back inside, and between the hook material and the base sheet, and the base sheet. It is preferable that a portion between the both side edges of the hook material and the diaper main body is temporarily fixed by the joining means. By temporarily fastening the fastening tape in this way, it is possible to temporarily fasten between the hook material and the base material sheet and between the base material sheet and the diaper body only by applying the joining means to one place. For this reason, the disposable diaper of the present invention having the above-described effects can be efficiently manufactured.

  Hereinafter, although the disposable diaper of this invention is demonstrated in detail with reference to drawings, of course, this invention is not restrict | limited at all by these.

  FIG. 1 is a partially cutaway plan view showing a state in which the disposable diaper of the present invention has been developed. In FIG. 1, a disposable diaper 1 is basically composed of a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent body 4 disposed between these two sheets. It has a front body 5 and a back body 6, and fastening tapes 7 are arranged on both side edges of the back body 6, and a target zone 8 made of a front seat for engaging the fastening tape 7 is arranged on the front body 5. Has been.

In FIG. 1, one of the fastening tapes 7 shows a state where the tape 7 is folded and temporarily fixed on the diaper body when the diaper is not used, and the other is the tape 7 when the diaper is used. The state is shown.
Further, the fastening tape 7 includes a base material sheet 9, a hook material 10 of a mechanical fastener provided in an end region of one surface of the base material sheet 9, and a surface provided with the hook material 10 of the base material sheet 9. The other end region of the base material sheet 9 is adhesively fixed to the side flap 11 of the diaper 1. ing.

  In FIG. 1, the hook material 10 of the fastening tape 7 shows a state in which the tip portion is cut into a parabolic shape and is formed to be narrower than the base material sheet 9. May be formed in the same width.

  FIG. 2 is a perspective view showing an example of the usage state of the disposable diaper of the present invention. In FIG. 2, the disposable diaper 1 is assembled in a pants shape by fastening two fastening tapes 7 arranged on both side edges of the back body 6 to a target zone 8 arranged on the front body 5. In this case, the fastening tape 7 on the diaper leg opening side is directly fixed to the target zone 8 of the front body 5, but the diaper waist opening side fastening tape 7 is partially fixed to the target zone 8. At the same time, a part thereof is also fixed to a target zone 8 ′ formed on the back surface of the fastening tape 7 on the side of the diaper leg opening.

As described above, the disposable diaper of the present invention can be fixed by superimposing the other fastening tape on the one fastening tape, so that it is excellent in wearability and fit for a wearer of any body shape. In particular, it is excellent in preventing leakage from around the legs.
In addition, in FIG. 2, although the example which fixed the fastening tape arrange | positioned at the side edge part of the same side was shown in the both-sides edge of a back body, depending on a wearer's body shape, it arrange | positions in the position where both side edges oppose. The fastening tapes may be connected to each other. In this case, the hook material of one fastening tape can be fixed to the target zone of the other fastening tape.

The target zone and hook material provided on the fastening tape preferably have a peel strength of 0.03 to 4.0 N / 100 mm ² (area of engagement portion) when measured under the following conditions. When the peel strength is within this range, the re-adhesion and re-peeling of the fastening tapes are easy, and the fastening tapes can be firmly fixed.
When the peel strength is less than 0.03 N, the engagement force between the hook material and the target zone is lowered, and the fastening tapes cannot be firmly fixed. When the peel strength exceeds 4.0 N, the engagement force between the hook material and the target zone becomes too strong, so that the fastening tape cannot be easily peeled off again.

In the present invention, the peel strength between the target zone and the hook material provided on the fastening tape means the peel strength measured as follows.
Measurement condition:
A member that forms a target zone on a plastic plate is fixed so that the target zone faces upward, and then a hook material portion of a fastening tape having a width of 20 to 60 mm is overlaid on the target zone to obtain a length of 60 mm. Using a roller with a weight of 1 kg, reciprocating the fastening tape surface at a speed of 5 mm / sec, pressing the hook material against the target zone and temporarily fixing it, then using the corners of the table as shown in FIG. Then, a weight of 1 kg is attached to the end of the fastening tape for 2 seconds, a load is applied in the direction in which the fastening tape is pulled, and the hook material and the target zone are engaged.
Next, using a Tensilon tensile tester, a plastic plate is fixed to one chuck, and the end of the fastening tape is fixed to the other chuck. Under the conditions of a distance between chucks of 50 mm and a tensile speed of 300 mm / min, The fastening tape is peeled off by pulling the end in a direction perpendicular to the surface of the target zone, and the 90-degree peel strength is measured. After the obtained measured value is divided by the area of the engagement portion between the target zone and the hook material, a value per 100 mm ² of the area of the engagement portion is calculated to obtain the peel strength.

FIG. 3 is a cross-sectional view showing a state in which the fastening tape is folded and temporarily fixed onto the diaper when the disposable diaper of the present invention is not used.
FIG. 3A shows a state before the fastening tape 7 is folded back, and the fastening tape 7 is formed on one surface of the belt-like base material sheet 9 and one end region of the base material sheet 9. A hook material 10 of a mechanical fastener is provided, and a target zone 8 ′ is provided on a surface opposite to the surface of the base material sheet 9 on which the hook material 10 is provided, and the other end of the base material sheet 9 is formed. The partial region is adhesively fixed to the side flap 11 of the diaper.

FIG. 3B shows a state in which the portion of the hook material 10 of the fastening tape 7 is folded back onto the base material sheet 9 with the hook material 10 inside, and at this stage, the base material sheet 9 is also shown. A joining means 12 made of an adhesive for temporarily fastening the fastening tape 7 on the side flap 11 is provided at a portion adjacent to the side flap 11.
FIG. 3 (c) shows that the fastening tape 7 in a state where the hook material 10 is folded is further folded on the side flap 11 with the hook material 10 folded inside, and between the base sheet 9 and the side flap 11. Is temporarily fixed by the joining means 12.

3 shows an example in which the target zone 8 ′ made of a material that can be engaged with the hook material 10 is provided on the surface of the base material sheet 9. However, the material that can engage the base material sheet 9 with the hook material 10 is shown. In this case, the base sheet 9 can be used as it is as the target zone 8 ′.
Moreover, when providing target zone 8 'in the base material sheet 9 surface, it is preferable to provide in the area of 30% or more of the area of the base material sheet 9 part extended from the side flap 11 of the diaper main body, 50% or more It is more preferable to provide in the area. When the area of the target zone occupying the area of the base sheet portion is less than 30%, when the fastening tapes are engaged with each other, the overlap between the hook material and the target zone becomes insufficient, and sufficient engagement force may not be obtained. Yes, not preferred.

FIG. 4 shows an example different from FIG. 3 and is a cross-sectional view showing a state from when the fastening tape is folded and temporarily fixed onto the diaper when the disposable diaper of the present invention is not used.
In FIG. 4, the state in which the fastening tape 7 is folded is the same as that in FIG. 3, but the joining means made of an adhesive on the base material sheet 9 inside the hook material 10 is adjacent to the hook material 10. 12 is provided [FIG. 4 (a)], the hook member 10 is folded over the joining means 12 and temporarily fixed to the base sheet 9 [FIG. 4 (b)]. Is folded back onto the side flap 11 and temporarily fixed onto the side flap 11 via the bonding means 12 made of an adhesive (FIG. 4C).
Moreover, in FIG. 4, the member which can be engaged with a hook material is used as the base material sheet 9, and the base material sheet 9 has shown the example provided with the function of target zone 8 'as it is.

FIG. 5 shows an example different from FIGS. 3 and 4, and is a cross-sectional view showing a state in which the fastening tape is folded and temporarily fixed on the diaper when the disposable diaper of the present invention is not used. It is.
In FIG. 5, the fastening tape 7 is folded in the same manner as in FIG. 3, but on the base material sheet 9 inside the hook material 10 and adjacent to the hook material 10, a joining means made of an adhesive 12 is provided [FIG. 5 (a)], and the hook material 10 is folded on the joining means 12 and temporarily fixed to the base sheet 9, and the back surface portion 13 of the hook material is made of an adhesive. Bonding means 12 is provided [FIG. 5 (b)], and further, the base sheet 9 is folded back onto the side flap 11, and the back portion 13 of the hook material is temporarily fixed onto the side flap 11 via the bonding means 12. [FIG. 5 (c)].

In addition, in FIG. 5, although the example which temporarily fixed between the base material sheet 9 and the hook material 10 and between the back surface part 13 of the hook material and the side flap 11 was shown, between the base material sheet 9 and the hook material 10 was shown. It is also possible to temporarily fix only between the back surface portion 13 and the side flap 11 of the hook material.
FIG. 5 also shows an example in which a member that can be engaged with the hook material is used as the base sheet 9, and the base sheet 9 has the function of the target zone 8 ′ as it is.

FIG. 6 shows an example different from FIGS. 3, 4, and 5, and shows a state in which the fastening tape is folded and temporarily fixed on the diaper when the disposable diaper of the present invention is not used. FIG.
FIG. 6A shows a state before the fastening tape 7 is folded back, and the fastening tape 7 is formed so that the arrangement portion of the hook material 10 is narrower than the normal width of the base sheet 9. In addition, on the base material sheet 9 inside the hook material 10, adjacent to the hook material 10, strip-shaped joining means 12 made of an adhesive is provided in the entire width direction of the base material sheet 9.

In FIG. 6B, the hook material 10 is folded back onto the joining means 12 of the base material sheet 9 with the hook material 10 inside, and is temporarily fixed to the base material sheet 9 via the joining means 12. Indicates the state.
In FIG. 6C, the base material sheet 9 in a state in which the hook material 10 is folded is further folded on the side flaps 11 with the folded hook material 10 inside, and the hook material 10 of the base material sheet 9 is folded. This shows a state where a portion adjacent to both side edges (that is, a portion where the hook material 10 does not exist) and the side flap 11 are temporarily fixed by the joining means 12.
FIG. 6 also shows an example in which a member that can be engaged with the hook material is used as the base sheet 9, and the base sheet 9 has the function of the target zone 8 ′ as it is.

FIG. 7 shows an example different from FIGS. 3 to 6, and is a cross-sectional view showing a state until the fastening tape is folded and temporarily fixed on the diaper when the disposable diaper of the present invention is not used. It is.
FIG. 7A shows a state before the fastening tape 7 is folded back. The fastening tape 7 is formed on one surface of the belt-like base material sheet 9 and one end region of the base material sheet 9. The hook material 10 of the mechanical fastener is disposed, and the target zone 8 ′ is disposed on the surface of the base sheet 9 opposite to the surface on which the hook material 10 is provided. The end region on the diaper main body side is not adhered to the base material sheet 9, and the non-adhesive portion 14 is formed. Furthermore, as for the base material sheet 9, the edge part area | region by the side of a diaper main body is adhere | attached and fixed to the side flap 11 of a diaper.

FIG. 7B shows a state in which the portion of the hook material 10 of the fastening tape 7 is folded back on the base material sheet 9 with the hook material 10 inside, and at this stage, the base material sheet 9 A joining means 12 made of an adhesive for temporarily fastening the fastening tape 7 on the side flap 11 is provided at a portion adjacent to the side flap 11.
In FIG. 7C, the fastening tape 7 in a state in which the hook material 10 is folded is further folded on the side flap 11 with the folded hook material 10 inside, and the base sheet 9 and the side flap 11 are separated. A state in which the space is temporarily fixed by the joining means 12 is shown.

  In FIG. 7, the length of the non-adhesive portion 14 formed in the end region of the target zone 8 ′ is preferably 10 mm or less, and more preferably 5 mm or less. If the length of the non-adhesive portion 14 is 10 mm or less, even when the fastening tapes 7 are overlapped, the target zone 8 ′ is not peeled off from the non-adhesive portion 14 and the function of the fastening tape 7 is maintained well. The fastening tapes 7 can be firmly engaged with each other. Furthermore, the appearance of the diaper product when used is also excellent.

  The target zone 8 ′ is made of a sheet body having a loop material or the like that can be engaged with the hook material 10, and the length of the non-adhered portion 14 at the end is usually 10 mm or less by an adhesive. The non-adhesive portion 14 is formed by adhering to the base sheet 9 when the length of the non-adhesive portion 14 is further shortened to increase the adhesive strength and improve the appearance of the product. It is preferable to bond by using at least one kind of heat fusion treatment selected from heat sealing, ultrasonic bonding, and hot embossing instead of bonding with an adhesive. By adopting such an adhesion method by heat-sealing treatment, various troubles may occur due to bleeding or leakage of the adhesive when the adhesive is used up to the end of the target zone 8 ′. You can get a product without. Further, the adhesion of the target zone to the base material sheet may be performed by adhering all the parts by one kind of the above-mentioned heat fusion treatment system or a combination thereof.

FIG. 8 shows an example different from FIGS. 3 to 7, and is a cross-sectional view showing a state until the fastening tape is folded and temporarily fixed on the diaper when the disposable diaper of the present invention is not used. It is.
In FIG. 8, the fastening tape 7 has a target zone 8 ′ having the same length as that of the base sheet 9, and the end region of the target zone 8 ′ together with the end region of the base sheet 9 is the diaper main body. The state until the fastening tape 7 is folded back and temporarily fixed onto the diaper is the same as in the case of FIG.

  7 and 8, the fastening tape is temporarily fixed in the same example as in FIG. 3, but is not limited to this, as shown in FIGS. 4 to 6. It is also possible to temporarily fix in the state.

  In the above-described embodiments, an adhesive is used as the joining means, and an example in which an adhesive layer is provided on the base sheet in advance before the base sheet or the hook material is folded back. The fastening tape can be temporarily fixed on the diaper by applying the treatment to the base sheet after the hook material and the base sheet are folded back using the treatment or the embossing treatment. Further, as the joining means, an adhesive, a heat melting treatment, and an embossing treatment may be used alone, or two or more methods may be used in combination.

  Hereinafter, although the material used in the disposable diaper of this invention is demonstrated, this invention is not restrict | limited at all by these.

In the disposable diaper of the present invention, the fastening tape includes a band-shaped base sheet, a surface of the base sheet provided with a hook material of a mechanical fastener, and a surface of the base sheet provided with the hook material. Is formed by providing a target zone made of a material capable of engaging with the hook material on the opposite surface.
As the substrate sheet, various nonwoven fabric sheets or films can be used, and these materials are formed alone or by laminating several kinds of materials.

Moreover, as a hook material, what is used for the normal disposable diaper which an engaging part has various shapes, such as a bowl shape, a mushroom shape, and a bowl shape, can be used as it is.
Furthermore, as the target zone, a loop material that can be engaged with the hook material, a non-woven fabric, a woven fabric, or the like can be used, and these materials may be used as they are, or a laminate laminated with another material, for example, a film. A structure may be used.
Moreover, it is preferable that the fastening tape has a gripping portion outside the portion provided with the hook material.

  In the disposable diaper of the present invention, as the liquid-permeable top sheet, a nonwoven fabric made of synthetic fiber or the like made of polyethylene, polypropylene, polyester, or other thermoplastic resin as a raw material is subjected to a hydrophilic treatment. .

  In the disposable diaper of the present invention, the liquid-impermeable back sheet is a liquid-impermeable liquid impermeable material such as a polyethylene sheet having micropores or a sheet stretched by adding a filler to a thermoplastic resin. This sheet is used. When such a sheet is used, stuffiness is improved and a comfortable wearing feeling can be obtained. Furthermore, a sheet having a laminated structure in which a cover sheet made of a nonwoven fabric is bonded to the outside of such a sheet can be used.

  In the disposable diaper of the present invention, any absorber can be used as long as it is used for absorbent articles such as ordinary disposable diapers. That is, a combination of cotton-like pulp and superabsorbent polymer (SAP), a material added with heat-fusible fibers, etc. can be used, and the whole is wrapped in a hydrophilic sheet such as a tissue. Those are preferred. In addition, a sheet-like absorbent body such as one provided with a SAP layer on one side of a hydrophilic sheet and one in which SAP is sandwiched between two hydrophilic sheets can also be used. Further, the shape of the absorber may be an hourglass shape or a rectangle.

  In the disposable diaper of the present invention, the side flap can be formed of a nonwoven fabric made of synthetic fiber made of polyethylene, polypropylene, polyester, or other thermoplastic resin, and the top sheet alone or the back The cover sheet portion extending from both side edges of the sheet may be formed alone, or the top sheet and the back sheet may be formed by laminating portions extending from both side edges of the absorber. Furthermore, it can also be formed by laminating the non-woven fabric on the portion of the backsheet that extends outward from both side edges of the absorber.

In the disposable diaper of the present invention, a loop material, non-woven fabric, woven fabric or the like that can be engaged with the hook material is used as a target zone for engaging the fastening tape disposed in the front body of the diaper main body. These materials may be used as they are, or other materials such as a laminated structure bonded to a film may be used.
In addition, when the sheet | seat of the laminated structure which bonded the cover sheet which consists of a nonwoven fabric which can be engaged with a hook material on the outer side of the sheet | seat which consists of a film as a back sheet | seat is used, a target zone can also be abbreviate | omitted.

  The disposable diaper of the present invention is provided with a base material sheet on both side edges of the back body, a hook material of a mechanical fastener provided on one surface of the base material sheet, and a target that can be engaged with the hook material on the other surface. Fastening tape formed with a zone is disposed, and the fastening tape is formed on the base sheet so that the end region of the target zone on the diaper main body side has a length of a non-adhesive portion of 10 mm or less. It is bonded and fixed, or bonded and fixed to the diaper body together with the base sheet.

  In the disposable diaper of the present invention having such a configuration, when the fastening tape is pulled to bring the diaper into close contact with the wearer's body, the target zone peels off even if the direction in which the fastening tape overlaps the fastening tape. Fastening tapes can be firmly fixed to each other without deteriorating the function of the tape, making it possible to fit well to wearers of any body shape, especially on the side edges of the back body In the case of a disposable diaper for adults in which two fastening tapes are arranged on each other, both the waist circumference and the leg circumference can be fitted well. In particular, there is no gap from the back side of the thigh to the side, so the diaper can be easily fitted around the leg, leakage from around the leg is prevented, and the burden on the caregiver and care recipient is reduced. Can be reduced. Moreover, since there are few or no non-adhesion parts of the target zone which stands up from a fastening tape at the time of wearing of a diaper, the external appearance at the time of wearing is also favorable.

  Furthermore, the disposable diaper of the present invention has a configuration in which when the diaper is not used, the fastening tape is folded twice with the hook material inside, and temporarily fastened on the diaper. Since the hook material does not come into contact with the top sheet of the diaper main body, the top sheet is not damaged or broken when the fastening tape is pulled out, and the product quality is not deteriorated. In addition, the fastening tape is temporarily fixed in the vicinity of both side edges of the diaper body and can be easily pulled out without being hidden by the wearer's body. It is useful as an unfoldable disposable diaper for adults including infants.

It is a partially notched top view which shows the state which expand | deployed the disposable diaper of this invention. It is a perspective view which shows the use condition of the disposable diaper of this invention. FIG. 5 is a cross-sectional view showing a state from when the fastening tape is folded and temporarily fixed on the diaper. FIG. 5 is a cross-sectional view showing a state from when the fastening tape is folded and temporarily fixed on the diaper. FIG. 5 is a cross-sectional view showing a state from when the fastening tape is folded and temporarily fixed on the diaper. It is a top view which shows the state until a fastening tape is folded and temporarily fixed on a diaper. FIG. 5 is a cross-sectional view showing a state from when the fastening tape is folded and temporarily fixed on the diaper. FIG. 5 is a cross-sectional view showing a state from when the fastening tape is folded and temporarily fixed on the diaper. It is a perspective view which shows the adjustment method of the fastening tape for measuring peeling strength.

Explanation of symbols

1: Disposable diaper 2: Liquid-permeable top sheet 3: Liquid-impermeable back sheet 4: Absorber 5: Front body 6: Rear body 7: Fastening tape 8: Target zone 8 ': Target zone 9: Base material Sheet 10: Hook material 11: Side flap 12: Joining means 13: Back portion 14 of the hook material: Non-adhesive portion 20 of the target zone 20: Plastic plate 21: Target zone 22: Hook material 23: Fastening tape 24: Weight

Claims (14)

A fastening tape having hook members of mechanical fasteners on both side edges of the back body of a diaper main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the two sheets. In the disposable diaper in which a target zone made of a member engageable with the hook material is formed in the front body of the diaper main body,
The fastening tape is formed by disposing the hook material of the mechanical fastener on one surface in one end region of the belt-shaped base sheet, and the other end region of the strip-shaped base sheet is It is bonded and fixed to the diaper body,
When the diaper is not used, the fastening tape is folded on the base material sheet with one end region where the hook material of the belt-like base material sheet is disposed on the base material sheet, and then folded. Further, the disposable diaper is further folded on the diaper main body with the end region inside, and in that state, at least one joint portion is temporarily fixed to the diaper main body by the joining means.   The fastening tape is provided with a target zone made of a member that can be engaged with the hook material on a surface opposite to the surface on which the hook material is disposed of the belt-shaped base sheet. Item 1. A disposable diaper according to item 1.   The target zone of the fastening tape is bonded and fixed to the base sheet so that the length of the non-adhered portion not bonded to the base sheet at the end of the diaper main body side is 10 mm or less. The disposable diaper of Claim 2 to do.   The target zone provided on the fastening tape is formed by adhering and fixing a member that can be engaged with a hook material of the mechanical fastener onto the belt-like base sheet, and at least a diaper of the target zone The end region on the main body side is bonded and fixed to the belt-like substrate sheet by at least one kind of heat fusion treatment selected from heat sealing, ultrasonic bonding, and hot embossing. The disposable diaper according to Item 3.   The target zone provided on the fastening tape is provided at least in the vicinity of the diaper main body side end of the base material sheet on the surface of the base material sheet opposite to the surface on which the hook material is provided. The disposable diaper according to any one of claims 2 to 4, wherein the diaper main body side end region is integrally fixed to the diaper main body together with the base sheet.   The said target zone provided in the said fastening tape is provided in the area of 30% or more of the area of the base-material sheet | seat part extended from the diaper main body, Any of the Claims 2-5 characterized by the above-mentioned. The disposable diaper of Claim 1. The target zone provided on the fastening tape and the hook material of the mechanical fastener have a peel strength of 0.03 to 4.0 N / 100 mm ² (area of engagement portion) when measured under the following measurement conditions. The disposable diaper of any one of Claims 2-6 characterized by these.
Measurement condition:
A member that forms a target zone on a plastic plate is fixed so that the target zone faces upward, and then a hook material portion of a fastening tape having a width of 20 to 60 mm is overlaid on the target zone to obtain a length of 60 mm. Using a roller with a weight of 1 kg, reciprocating the fastening tape surface at a speed of 5 mm / sec, pressing the hook material against the target zone and temporarily fixing it, then using the corners of the table as shown in FIG. Then, a weight of 1 kg is attached to the end of the fastening tape for 2 seconds, a load is applied in the direction in which the fastening tape is pulled, and the hook material and the target zone are engaged.
Next, using a Tensilon tensile tester, a plastic plate is fixed to one chuck, and the end of the fastening tape is fixed to the other chuck. Under the conditions of a distance between chucks of 50 mm and a tensile speed of 300 mm / min, The fastening tape is peeled off by pulling the end in a direction perpendicular to the surface of the target zone, and the 90-degree peel strength is measured. After the obtained measured value is divided by the area of the engagement portion between the target zone and the hook material, a value per 100 mm ² of the area of the engagement portion is calculated to obtain the peel strength.   When the diaper is not used, the fastening tape is folded on the band-shaped base material sheet with one end region where the hook material of the belt-shaped base material sheet is disposed inside the hook material. On the base sheet in which the end region is folded back on the diaper main body with the end region inside, and the back surface of the end region folded back with the hook material inside and / or the back surface of the end region does not exist The disposable diaper according to any one of claims 1 to 7, wherein the disposable diaper is temporarily fixed on the diaper main body by a joining means provided on the diaper.   When the diaper is not used, the fastening tape is folded on the base material sheet with one end region where the hook material of the belt-shaped base material sheet is disposed on the inside of the hook material. The disposable diaper according to any one of claims 1 to 8, wherein the disposable diaper is temporarily fixed by a joining means provided on a base material sheet surface facing the material.   In the fastening tape, one end region where the hook material of the belt-like base material sheet is arranged is formed to be narrower than the other base material sheet portion, and when the diaper is not used, the belt-like base material One end region of the sheet is folded on the base sheet with the hook material inside, and further folded on the diaper body with the folded end region on the inside, in that state, on the base sheet The hook material is temporarily fixed to the base material sheet by the joining means provided in the entire width direction of the base material sheet at the position where the hook material faces, and the folded base material sheet is in the end region. The disposable diaper according to any one of claims 1 to 9, wherein the disposable diaper is temporarily fixed to the diaper body at a portion where the end regions on both sides of the outer side do not exist.   The said target zone provided in the said fastening tape is formed with the nonwoven fabric, The disposable diaper of any one of Claims 2-10 characterized by the above-mentioned.   The disposable diaper according to any one of claims 2 to 10, wherein the target zone provided on the fastening tape is formed of a laminate of a woven fabric and a film.   The disposable diaper according to any one of claims 1 to 12, wherein the joining means for temporary fixing comprises at least one of an adhesive, a heat melting treatment, and an embossing treatment. .   The disposable diaper according to any one of claims 1 to 13, wherein at least two fastening tapes are arranged on each side edge of the back body of the diaper main body.

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