JP2002045214A - Fastening tape, manufacturing method for it, and disposable diaper using fastening tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening tape, a manufacturing method for it, and a disposable diaper using it, for preventing an engaging surface from being caught in a manufacturing machine and having a simple manufacturing process by dispensing with manufacture for applying adhesives. SOLUTION: A base material sheet is formed of a nonwoven fabric having a loop capable of being engaged with a male side engaging piece 15. The male side engaging piece 15 is temporarily engaged with the nonwoven fabric (temporary engaging part 37c) exposed between the male side engaging piece 15 and an attaching part 37a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening tape and a method for manufacturing the fastening tape, and to a disposable diaper using the fastening tape.

[0002]

2. Description of the Related Art A fastening tape is sometimes used for disposable diapers and various kinds of clothing. Among fastening tapes, one using a hook-and-loop fastener has an advantage that it can be attached and detached any number of times. Therefore, it is a suitable fastening tape.

FIG. 8 (a) is a developed plan view showing an example of a disposable diaper using the above-mentioned fastening tape, with the body side (the side in contact with the body) of the diaper facing forward. FIG. 8B is a front view showing an example of the fastening tape.

The disposable diaper 10 is formed by laminating a liquid-impermeable (or liquid-impermeable, moisture-permeable) back sheet 21 and a liquid-permeable top sheet 23 with an absorber 22 interposed therebetween. Has an hourglass shape in which the center of the long side of the rectangle is generally hollow. This recessed portion becomes the crotch portion 14, one of which is widened continuously from the crotch portion 14 is the dorsal portion 11, and the other is the abdominal portion 13. A fastening tape 12 is provided near the front end of each of the two wing pieces 11a on the back side portion 11.

The fastening tape 12 is provided on a base sheet 17 made of a polypropylene-polyethylene composite film (a film obtained by laminating a polyethylene film sandwiched between two polypropylene films and co-pressing). One end portion of the base sheet 17 is a knob 17b, and the other end portion is an attachment portion 17a with the diaper body (near the tip of the wing piece 11a). As the base sheet 17, a polyethylene terephthalate film or the like is used in addition to the polypropylene-polyethylene composite film.

A disposable diaper 10 is provided with a female engaging piece 16 which can be engaged with the male engaging piece 15 on the opposite body side (outer side) of the abdominal part 13. Piece 16
The male side engaging piece 15 can be worn by engaging with the male engaging piece 15. The male-side engaging piece 15 includes an engaging piece in which a hook-type engaging element is planted, an engaging piece in which a mushroom-type engaging element is planted, and the female-side engaging piece 16 includes a loop-type engaging piece. And the like.

FIG. 9 is a plan view for explaining a conventional method of manufacturing the fastening tape 12. As shown in FIG.

First, an elongated male-side engaging strip 25 is adhered on a long polypropylene film (wide strip) 28 at a substantially central position in the width direction thereof. Next, the male side engagement strip 25 is cut along a meandering cutting line 27 so as to span over and cut into right and left parts. And the cutting line 2 in the width direction
6 and cut into individual fastening tapes 12 having two male engaging pieces 15.

[0009]

By the way, in the production of the above-mentioned fastening tape, the male side engaging piece is attached or cut along the production line continuously. If the engaging surface of the engaging strip 25 (male side engaging piece 15) is in an exposed state, the engaging surface may be caught by a manufacturing machine or the like, and a smooth manufacturing flow may not be realized.

[0010] Also, in the manufacturing process of the disposable diaper, various components are mounted and folded on the manufacturing line continuously, and at this time, the engaging surface of the male engaging piece 15 is exposed. In this state, there is a fear that the engaging surface may catch on the manufacturing machine or other parts of the diaper as described above, and a smooth manufacturing flow may not be realized, and an accident that the diaper may be further involved in the manufacturing machine may occur. There are concerns.

Then, an adhesive for temporary fixing is applied to the vicinity of the male-side engaging piece, and the male-side engaging piece is folded inside with the male-side engaging piece inside.
A method of temporarily bonding with the above-mentioned temporary fixing adhesive has been proposed. In this case, since the engaging surface of the male-side engaging piece 15 is not exposed, an accident that the engaging surface is caught by a manufacturing machine or the like is prevented.

[0012] However, in temporarily fixing as described above, a step of applying an adhesive for temporary fixing is newly required, which causes a problem that the manufacturing process becomes complicated, and also increases costs.

Therefore, in the present invention, the fastening surface of the male side engaging piece does not stick to the manufacturing machine and the like, and can be manufactured smoothly, and the manufacturing process is not complicated and the manufacturing cost is not so high. And a method for producing the same. In addition, another object of the present invention is to provide a disposable diaper using the fastening tape.

[0014]

A fastening tape according to the present invention is provided with a male fastener of a hook-and-loop fastener provided on a folded piece formed at one end of a base sheet, and the other side of the base sheet. In a fastening tape provided with an attachment portion to another component, the gist is that the base sheet has a nonwoven fabric at least in the folded area that can be engaged with the male side engaging piece.

Further, the method for producing a fastening tape according to the present invention is characterized in that a wide band of a nonwoven fabric or a wide band of a multilayer sheet in which a film and a nonwoven fabric are laminated is attached to a narrow band of a male engaging piece of a hook-and-loop fastener. Affixing a surface opposite to the engaging surface to a central portion in the width direction along the longitudinal direction of the wide band-shaped body, and a zigzag having an amplitude longer than the male-side engaging piece narrow band body attaching width. Forming a folded piece by cutting along a line, folding the folded piece with the male side engaging piece forming side inside and engaging with the nonwoven fabric, and longitudinally separating the separated wide band-shaped body. And a step of cutting at an arbitrary interval.

As described above, the male engaging piece is temporarily engaged with the nonwoven fabric in the folded area (nonwoven fabric of the base sheet between the male engaging piece and the mounting portion), and the engaging surface of the male engaging piece is provided. Is not exposed, so that the engaging surface of the male side engaging piece does not catch on the manufacturing machine, etc., so that a smooth manufacturing flow can be realized, and in addition, the step of applying the temporary fixing adhesive is performed. Since it is not necessary, manufacturing is simplified.

Examples of the base sheet include a sheet composed of a nonwoven fabric alone, a laminate of a nonwoven fabric and another film, and a sheet composed of a nonwoven fabric laminated on both sides of a film. Can be

Of these, the substrate sheet of the nonwoven fabric alone is
Since it shows good air permeability, it has an effect of preventing stuffiness.
On the other hand, in the case where a polypropylene-polyethylene composite film or the like is used as the base sheet as in the past, since the air permeability is poor, for example, when used in a disposable diaper as described above, there is a concern that the fastening tape portion may become stuffy. there were. Incidentally, for the purpose of preventing stuffiness, it is conceivable to use a breathable film provided with a plurality of holes for the base sheet. There is a concern that it is too soft and difficult to manufacture.

In the above-mentioned fastening tape, the male-side engaging piece is connected to the opposite male-side engaging piece forming surface of the base sheet (that is, the surface on which the male-side engaging piece is not provided). Preferably, the nonwoven fabric that can be combined is exposed.

For example, when a fastening tape is used in a disposable diaper as described below, a pair of fastening tapes is generally provided on the left and right sides of the back of the diaper. When the diaper is worn, the fastening tape is used. When used, the upper fastening tape can be engaged with the nonwoven fabric on the opposite side of the body of the lower fastening tape, so even when the user is too thin and the left and right fastening tapes intersect. The fastening tape can be stopped properly.

Further, in the fastening tape according to the present invention, it is preferable that the nonwoven fabric is made of a polyester-based synthetic fiber and has a basis weight of 30 to 100 g / m ² .

When the substrate sheet is the conventional polypropylene film, the film having the holes, or a very thin non-woven fabric, the substrate sheet is too flexible, so that when the folded piece is folded, twisting or distortion occurs. However, in the case of a nonwoven fabric made of a polyester-based synthetic fiber having a basis weight of 30 to 100 g / m ² as described above, there is little concern that twisting and distortion will occur because of the appropriate rigidity (stiffness). More preferably 50 g / m ² or more as the basis weight of the nonwoven fabric, 70 g / m ²
It is as follows.

In addition, in the fastening tape according to the present invention,
It is preferable that the nonwoven fabric provided in the folded area has a folding line formed in parallel with the folding line of the folded piece. In addition, the above-mentioned "folding line" means that, for example, a linear heat-fused portion that is orthogonal to the folding line is formed in a ladder step shape, and a group of the ladder step-shaped linear heat-fused portions is the folded line as described later. In the case where a plurality of groups are provided in parallel with each other, the area between the linear heat-fused sections and the group of linear heat-fused sections, that is, the area where the linear heat-fused sections do not overlap (FIG. A, B, C
.. Are formed in parallel with the folding line, and this portion (A, B, C... In FIG. 1B) and the like are referred to.

By forming the folding line in advance in this way, the male engaging piece can be smoothly folded at a predetermined position when hiding the engaging surface of the male engaging piece.

Further, in the fastening tape according to the present invention, the non-woven fabric is composed of heat-fusible fibers, and the linear heat-fused portion of the non-woven fabric in a direction orthogonal to the fold line except for the fold line. Is preferably provided in a ladder step shape.

Since the linear heat-sealed portion is harder than the portion not heat-sealed, it does not break at the heat-sealed portion but at the adjacent non-heat-sealed portion. In other words, the fold line, which is the non-heat-fused portion, is more easily broken than the other portions, and thus can be smoothly folded at the fold line portion.

The gist of the disposable diaper according to the present invention is that the fastening tape is provided in a pair, on the back side or the abdomen side of the diaper.

[0028]

1A and 1B are front views for explaining an example of a method for manufacturing a fastening tape according to the present invention, and FIG. It is an enlarged front view. 3 is a sectional view taken along line XX shown in FIG. 1A, and FIG. 4 is a sectional view taken along line YY shown in FIG.

As a raw material of the base sheet, a basis weight of 60 g / m
^{In step 2} , a wide band 38 made of a long non-woven fabric made of polyester synthetic fiber is used, and a linear heat-sealed portion 40 in a direction orthogonal to the longitudinal direction is formed on the wide band non-woven fabric 38 in a ladder step shape. A group (40a, 40a,
40b, 40c...) Are formed in plural groups in parallel in the width direction of the wide band-shaped body 38 as shown in FIG. In addition, the nonwoven fabric wide band-shaped body 38 has a loop that can be engaged with the male side engagement piece on both sides.

An elongated male-side engaging strip 25 is attached to the nonwoven fabric wide strip 38 at the center in the width direction with an adhesive. Also, a hot melt adhesive is applied to the vicinity of both ends of the wide non-woven fabric strip 38 to form a mounting part 37a for other parts. 3 and 4, reference numerals 31 and 33 denote adhesive layers.

Next, a cutting line (zigzag line) 27 meandering with an amplitude longer than the sticking width of the narrow band 25 so that the male side engaging strip 25 (the male side engaging piece 15) is bridged. (FIG. 1A). The male side engaging piece 15 and the mounting portion 37
The non-woven fabric (base sheet) between “a” becomes the temporary engagement portion (turning region) 37c. The nonwoven fabric (base sheet) portion ahead of the male side engaging piece 15 is a knob 37b.

Thereafter, each group 40 of the linear heat-fused portions 40
a, 40b, 40c... among the folding lines (A, B, C... shown by two-dot chain lines), any of the folding lines near the root of the mounting portion of the male side engaging piece 15 and the male side engaging piece 1
5 is folded inward, and the male side engaging piece 15 is temporarily engaged with the nonwoven fabric at the temporary engaging portion 37c (FIG. 2).

At the time of this folding, the linear heat-sealed portion 40 is harder than the portion not heat-sealed.
The linear heat-sealed portion 40 does not break but is folded along relatively soft folding lines A, B, C,.... Since the folding lines A, B, C... Are formed linearly between the male engaging piece 15 and the mounting portion 37a, the folding lines A, B, C. Can be. The folding line A, B, C,... Can be selected by changing the guide position applied to the running belt 38.

Next, the tape is cut along the cutting line 26 in the width direction to form individual fastening tapes 32 each having two male engaging pieces 15.

As described above, immediately after the male side engaging piece 15 is cut along the cutting line 27, the male side engaging piece 15 is folded and the engaging surface of the male side engaging piece 15 is concealed. Disappears. In addition, since the male side engagement piece 15 is temporarily engaged with the non-woven fabric at the temporary engagement portion 37c, the temporary engagement is not released by vibration, wind, or the like in the manufacturing process.

In addition, by folding as described above, the width of the fastening tape becomes narrower, so that the manufacturing space on the downstream side becomes smaller and the installation space for equipment can be reduced.

FIG. 5 is a partial plan view showing the disposable diaper to which the fastening tape 32 has been attached. The vicinity of the left wing piece 11a of the back side portion 11 is shown on the side of the body of the diaper (the surface in contact with the body). FIG. FIG.
Is a front view showing a state in which the disposable diaper is worn. It should be noted that the same components as those in FIGS.

In the process of manufacturing the disposable diaper, when the top sheet 23 and the back sheet 21 are laminated, the mounting portion 37a of the fastening tape 32 is disposed so as to be sandwiched between these sheets 23, 21 and applied in advance. Adhesion is performed by using a hot-melt adhesive or by ultrasonic bonding or hot emboss bonding instead of the adhesive.

Even during the manufacture of the disposable diaper, the fastening tape 32 does not expose the engaging surface of the male side engaging piece, so that there is no fear that the fastening tape 32 will be caught by the manufacturing machine or the diaper parts. Therefore, smooth production can be realized.

When the disposable diaper is worn, the knob 37c is pinched to release the temporary engagement of the male engagement piece 15 with the temporary engagement portion 37c, and the female engagement piece 16 of the diaper ventral part 13 is removed.
Wear by engaging with.

The fastening tape 32 has a base sheet made of non-woven fabric and has good air permeability.
Even when using No. 2, it can be worn comfortably without stuffiness during wearing. Immediately before the operation of engaging the male side engaging piece 15 with the female side engaging piece 16, the temporary engaging portion 37 c
By peeling off the temporary engagement with the above, it is possible to prevent the engaging surface of the male side engaging piece 15 from catching on other clothing parts or the like.

FIG. 7 is a front view showing a case where a thin person wears the disposable diaper. In the case of such a thin person, the fastening tape 32 crosses on the abdomen side, and the male engaging piece 15 cannot be engaged with the female engaging piece 16.
However, the base sheet of the fastening tape 32 (nonwoven fabric 38)
Can be engaged with the male-side engaging piece also on the opposite side of the body (the side on which the male-side engaging piece is not attached), so that even if the fastening tape 32 crosses, 32 and can be worn on the opposite body side.

As described above, the fastening tape according to the present invention, the method for producing the same, and the disposable diaper using the fastening tape have been specifically described with reference to the drawings showing examples. The present invention is not limited to the illustrated examples, and can be implemented with appropriate modifications within a range that can be adapted to the above-mentioned purpose. All of them are included in the technical scope of the present invention.

[0044]

According to the fastening tape and the method of manufacturing the fastening tape according to the present invention, the engaging surface of the male side engaging piece of the fastening tape does not catch on a manufacturing machine or the like, and a smooth manufacturing is possible. Is not complicated, and the production cost is not so high.

In the disposable diaper according to the present invention, since the engaging surface of the fastening tape is not exposed during the production of the diaper, there is no concern that the disposable diaper will be caught by the production machine, the diaper parts, etc., and the diaper can be produced smoothly. Can be.

[Brief description of the drawings]

FIG. 1A is a front view for explaining an example of a method for manufacturing a fastening tape according to the present invention, and FIG. 1B is an enlarged front view of a base material sheet.

FIG. 2 is a front view for explaining an example of the method for manufacturing the fastening tape according to the present invention.

FIG. 3 is a cross-sectional view taken along line XX shown in FIG.

FIG. 4 is a sectional view taken along line YY shown in FIG. 2;

FIG. 5 is a partial plan view showing a disposable diaper to which a fastening tape according to an example of the present invention is attached.

6 is a front view showing a state in which the disposable diaper shown in FIG. 5 is worn.

FIG. 7 is a front view showing a case where a thin person wears the disposable diaper shown in FIG. 5;

FIG. 8A is a developed plan view showing an example of a conventional disposable diaper using a fastening tape, and FIG. 8B is a front view showing an example of a conventional fastening tape.

FIG. 9 is a plan view for explaining a conventional method of manufacturing a fastening tape.

[Explanation of symbols]

 Reference Signs List 11 back side part 11a wing piece 13 belly side part 15 male side engaging piece 16 female side engaging piece 21 back sheet 22 absorber 23 top sheet 25 male side engaging piece narrow band 26, 27 cutting line 31, 33 bonding Agent layer 32 Fastening tape 37a Attachment part 37b Knob part 37c Temporary engagement point 38 Non-woven fabric wide band 40 Linear heat-fused part 40a, 40b, 40c Linear heat-fused part group A, B, C Folding line

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09J 7/00 (72) Inventor Satoshi Maeda 89-1 Oyamakita Ota-Kita, Sadamitsu-cho, Mima-gun, Tokushima Toyo-E (72) Inventor Kazuyo Mori 89-1 Otakita, Ota, Sadamitsu-cho, Mima-gun, Tokushima Pref. AB03 CA04 CC02 CC03 CE00 FA08 FA09

Claims (8)

[Claims] 1. A fastening tape in which a male-side engaging piece of a hook-and-loop fastener is provided on a folded piece formed at one end of a base material sheet, and a mounting portion to another component is provided on the other side of the base material sheet. The fixing tape according to any one of claims 1 to 3, wherein the base sheet has a nonwoven fabric capable of engaging with the male-side engaging piece at least in the folded region. 2. The fastening tape according to claim 1, wherein the base sheet is made of a nonwoven fabric. 3. The fastening tape according to claim 1, wherein the base sheet is formed by laminating a film and a nonwoven fabric. 4. The fastening tape according to claim ² , wherein the nonwoven fabric is made of a polyester-based synthetic fiber and has a basis weight of 30 to 100 g / m ² . 5. The non-woven fabric provided in the folded area,
The fastening tape according to any one of claims 1 to 4, wherein a folding line parallel to the folding line of the folding piece is formed. 6. The non-woven fabric is formed of heat-fusible fibers, and the non-woven fabric is provided with a linear heat-fused portion in a direction perpendicular to the fold line in a ladder step shape, leaving the fold line. The fastening tape according to claim 5, which is: 7. The method for producing a fastening tape according to claim 1, wherein a wide band of a nonwoven fabric or a wide band of a multilayer sheet obtained by laminating a film and a nonwoven fabric is provided. Affixing the narrow band body of the male side engaging piece of the fastener to a surface opposite to the engaging surface at a center in the width direction along the longitudinal direction of the wide band-shaped body; A step of forming a folded piece by cutting along a zigzag line having an amplitude longer than the width of the thin strip, and a step of folding the folded piece with the male side engaging piece forming side inside and engaging with the nonwoven fabric And a step of cutting the separated wide band-shaped body at an arbitrary interval in the longitudinal direction. 8. A disposable diaper, wherein the fastening tape according to any one of claims 1 to 6 is provided on a pair of the back side or the abdomen side of the diaper.