JP2004267257A - Disposable paper diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable paper diaper having an FTT (frontal target tape), which is excellent in air permeability and peeling force, excellent in appearance, soft, easy to handle, and capable of being manufactured at a low cost. <P>SOLUTION: This disposable paper diaper is provided with a liquid permeable top sheet for which a diaper body covers a front side, a liquid impermeable back sheet for which the body covers a back surface side, an absorbent interposed between the respective sheets, and fastening tapes for fixing the diaper, which are fixed to both sides of the outer side back part of the back sheet. Then, a front body and a back body are formed at the diaper body by folding it from a longitudinal direction center part and it is used by fixing the fastening tape to the FTT (frontal target tape) stuck to the upper surface of the abdominal position of the front body. Also, the FTT is constituted of a base body composed of nonwoven fabric, especially SMS (Spun-bond Meltblown Spun-bond) type nonwoven fabric, and a fixing member provided on the upper surface of the base body to be engaged with the fastening tape. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disposable disposable diaper, and more particularly, to a tape-type disposable disposable diaper which is used by fastening a fastening tape to an FTT (frontal target tape) attached to an upper surface of an abdominal position of a front body.
[0002]
[Prior art]
BACKGROUND ART Conventionally, pants-type disposable diapers and tape-type disposable diapers have been known as disposable disposable diapers. Of these, the pants-type disposable diaper has a waist (waist circumference) portion of a diaper main body including a top sheet covering the front side, a back sheet covering the back side, and an absorber interposed between the sheets. Closed beforehand and formed in pants type, the waist part can be adjusted somewhat with elastic members such as rubber strings, but since it is fixed in size, it should fit the wearer's waist when purchasing It is necessary to select. On the other hand, a tape-type disposable diaper uses a fastening tape for fastening to an FTT attached to an upper surface of an abdominal position of a front body of the diaper main body, and is used depending on a size of a waist of a wearer. At present, this tape-type paper diaper is often used because the fastening position can be adjusted.
[0003]
FIG. 4 shows an example of the above-mentioned disposable tape-type disposable diaper. Specifically, FIG. 4 is a partially cutaway plan view of the disposable diaper 100 as viewed from the back (back surface) side.
[0004]
The disposable diaper 100 includes a liquid-permeable top sheet 102 made of a nonwoven fabric or the like covering the front side, a liquid-impermeable back sheet 103 made of a polyethylene film or the like covering the back side, and cotton interposed between the sheets. Diaper body 101 comprising an absorbent body 104 made of pulp or the like, and a fastening tape 110 for fastening a diaper fixed to both sides of the outer back position 109b of the back sheet 103, from the center in the longitudinal direction, It is a tape-type paper diaper configured to form a front body and a back body. The fastening tape 110 is fixed to the FTT 111 attached to the upper surface of the back sheet 103 at the abdomen position 109f of the front body when the paper diaper 100 is used.
[0005]
The diaper main body 101 is provided with side flaps 106s that are curved inward on both sides, respectively, and has an entire hourglass shape, and end flaps 107f and 107b are provided at upper and lower ends thereof. In order to improve the fit, the side flaps 106s are provided with elastic elastic members 108s made of a plurality of rubber cords and the like. Similarly, the end flaps 107f are provided with elastic elastic members 108f, and the end flaps 107b are provided with elastic elastic members 108f. The elastic expansion members 108b are provided respectively.
[0006]
FIG. 5 is a perspective view showing a state in which the paper diaper main body 101 formed as described above is worn by a wearer and used. As described above, the front body and the back body are fixed to the wearer's waist by fastening the fastening tape 110 to the FTT 111.
[0007]
FIG. 6 is an enlarged view of a main part of a section taken along line XX in FIG. 4 and shows a layer configuration at a portion of the FTT 111 to which the fastening tape 110 is fixed. As shown in the figure, the FTT 111 portion includes, in order from the upper layer, the FTT 111, the back sheet 103, the waterproof film 112, the crepe paper 113, the absorber 104, the crepe paper 113, and the top sheet. Adhered to each other by the indicated adhesive.
[0008]
The FTT 111 includes a fastening member (female material) 111b formed in a loop shape by knitting (weaving) on a fastening surface of the base 1 made of a resin film such as a polyethylene film.
[0009]
On the other hand, the fastening tape 110 fastened to the FTT has a hook-shaped fastening member (male material) on the fastening surface side of a base 110a made of a flexible sheet material or the like, as shown by a virtual line in FIG. The fastening tape 110 is fastened to the FTT 111 by mechanically engaging the fastening member 110b with the fastening member 111b.
[0010]
[Problems to be solved by the invention]
However, as described above, in the conventional disposable diaper 100, since the base 111a of the FTT 111 is formed of a resin film, air permeability is inhibited by the resin film at the portion of the FTT 111, that is, at the abdomen position 109f of the upper front body, For this reason, there has been a problem that the abdomen of the wearer gets stuffy.
[0011]
Also, in the conventional disposable diaper 100, the fastening force between the fastening member 110b on the fastening tape 110 side and the fastening member 111b on the FTT 111 side is strong, and both are fastened very firmly. Therefore, the fastening tape 110 is peeled off from the FTT 111. In such a case, a considerably strong peeling force is required, and as a result, there is a disadvantage that delamination occurs and a loop-shaped fiber on the surface of the fastening member 111b is picked up. When the fastening member 111b is damaged in this way, the engaging force gradually disappears, and the fastening tape 110 cannot be firmly fastened to the FTT 111, and this portion is fluffy and has a disadvantage that the appearance is deteriorated.
[0012]
Further, when light is applied to this portion, the light shines, so that a soft feeling like a cloth cannot be obtained, and the appearance is hard, so that it is not preferable in terms of quality.
[0013]
Furthermore, since the resin film constituting the base 111a has a considerable thickness and bulkiness, handling such as mounting and dismounting and disposal of the paper diaper 100 is troublesome, and in addition, the cost of the resin film material itself is high. .
[0014]
The present invention has been made in view of the circumstances described above, and has as its object to provide a disposable disposable diaper having an FTT which is excellent in breathability and peeling force, has a good appearance, is flexible and easy to handle, and can be manufactured at low cost. Is to provide.
[0015]
[Means for Solving the Problems]
The object of the present invention is to provide a liquid-permeable top sheet that covers the front side, a liquid-impermeable back sheet that covers the back side, an absorber interposed between the sheets, and an outer back portion of the back sheet. A front body and a back body are formed by folding a diaper main body including fastening tapes for fastening diapers fixed on both sides from a central portion in a longitudinal direction, and the fastening tape is attached to an upper surface of an abdominal position of the front body. A tape-type disposable disposable diaper to be fastened to an attached FTT (Frontal Target Tape) for use, wherein the FTT is a non-woven fabric substrate and a fastening member provided on an upper surface of the substrate and engaged with the fastening tape. This is achieved by providing a disposable paper diaper characterized by comprising:
[0016]
Further, the above object of the present invention is more effectively achieved by providing a disposable paper diaper, wherein the nonwoven fabric is an SMS (spunbond / meltblown / spunbond) nonwoven fabric.
[0017]
Further, the above object of the present invention is more effectively achieved by providing a disposable paper diaper, wherein the fastening member is a female material that engages with a male material provided on the fastening tape. You.
[0018]
Further, the above object of the present invention is more effectively achieved by providing a disposable paper diaper wherein the FTT has an air permeability of 1.0 to 25 seconds / 300 cc.
[0019]
Furthermore, the above object of the present invention is more effectively achieved by providing a disposable paper diaper characterized in that the peeling force between the fastening tape and the FTT is 110 to 1000 g.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the contents of the present invention will be described in detail based on preferred embodiments. The disposable disposable diaper according to the present invention has substantially the same configuration except that the FTT configuration of the above-described conventional disposable diaper is different. Will be explained.
[0021]
FIG. 1 is a partially cutaway plan view of a disposable disposable diaper 100 ′ according to an embodiment of the present invention, as viewed from the back (back surface) side, and FIG. .
[0022]
This paper diaper 100 ′ is, like the conventional paper diaper 100, a liquid-permeable top sheet 102 made of a nonwoven fabric or the like covering the front side, a liquid-impermeable back sheet 103 made of a polyethylene film or the like covering the back side, A diaper main body 101 including an absorbent body 104 made of cotton-like pulp or the like interposed between the respective sheets, and a fastening tape 110 for fastening a diaper fixed to both sides of an outer back position 109b of the back sheet 103. A tape-type disposable diaper configured to form a front body and a back body by being folded from a central portion in a longitudinal direction, and a fastening tape 110 is attached to an upper surface of the back sheet 103 at an abdominal position 109f of the front body. To the FTT 111 '.
[0023]
Here, the layer configuration at the FTT 111 ′ portion is as shown in FIG. 2, and the other layer configurations except for the uppermost FTT 111 ′ are the same as the conventional paper diaper 100. The other layer configurations are not necessarily limited to those shown in the drawings. For example, the waterproof film 103 can be changed to various configurations depending on the purpose, for example, the waterproof film 103 may be deleted in some cases.
[0024]
The FTT 111 'in the paper diaper 100' has a fastening member (female material) 111b on the upper surface of a base 111'a made of a nonwoven fabric. As shown in the cross-sectional view of FIG. 3, the non-woven fabric constituting the base 111'a includes, in order from the upper layer, a spun-bond non-woven fabric 111'as, a melt-blow non-woven fabric 111'am, and a spun-bond non-woven fabric 111'as. Consists of layers. In the present invention, the nonwoven fabric having the three-layer structure is referred to as “SMS type nonwoven fabric” with an initial of each.
[0025]
Here, as is well known in the art, the spunbond nonwoven fabric 111'as is a nonwoven fabric which is mainly manufactured by self-adhesive bonding by direct spinning, and can be manufactured at a high speed, for example, as wide as 5 meters or more. In addition, it is possible to design according to the application. On the other hand, the melt-blown nonwoven fabric 111'am is an extra-fine fiber sheet produced by extruding a polymer at a high pressure and blowing it away with hot air. , Non-transmissive, and rich in insulation. Therefore, although this FTT 111 ′ is composed of three layers, the layer thickness can be made extremely thin as compared with a conventional resin film. In addition, this SMS type nonwoven fabric can be manufactured by a known manufacturing technique, for example, by arranging a spunbond manufacturing facility, a melt blow manufacturing facility, and a spunbond manufacturing facility known in the art in this order.
[0026]
In this paper diaper 100 ', the fastening position of the fastening tape 110 is displayed on the upper surface of the base 111'a constituted as described above, that is, the upper surface of the uppermost spunbonded nonwoven fabric 111'as, or for educational purposes. A target print 111'P composed of numerals, pictures, and the like is provided. A fastening member 111b is adhered to the upper surface side of the spunbonded nonwoven fabric 111'as on which the target printing 111'P has been applied by an adhesive.
[0027]
As described above, in the paper diaper 100 ′, the FTT 111 ′ is made of a thin and flexible nonwoven fabric, and therefore, according to the paper diaper 100 ′, the air permeability at the portion of the FTT 111 ′, that is, the abdomen position 109 f in the upper front body. Is not disturbed as in the conventional disposable diaper 100, and therefore does not cause stuffiness on the abdomen of the wearer.
[0028]
Regarding the air permeability, based on the air permeability experiment conducted by the present inventors, that is, based on the “air and air permeability test method for paper and paperboard” specified in JIS-P-8117-1980, the FTT 111 and 111 ′ A set of 16 50 mm × 50 mm sheet pieces was set on the top of the inner cylinder of the B-type air permeability meter, and the time required for the inner cylinder to float in the oil in the outer cylinder and pass through a height of 300 graduations (cc) was measured. According to the experiment to be measured, the permeability of the FTT 111 in the conventional disposable diaper 100 was 1.0 to 25 seconds / 300 cc, whereas the permeability of the disposable diaper 100 ′ at the FTT 111 ′ portion was 0%. 0.01-1.18 sec / 300 cc, which is a small value of 1% or less.
[0029]
Further, as described above, in the paper diaper 100 ', the fastening tape 110 is mechanically fastened to the portion of the FTT 111' having the fastening member (female material) 111b on the upper surface of the non-woven fabric base 111 '. Therefore, both are fixed with a preferable engaging force, and when they are peeled off, delamination does not occur unlike the conventional disposable diaper 100.
[0030]
Regarding this peeling property, a mechanical tape peeling strength experiment generally performed in the art conducted by the present inventors, that is, a kraft tape was attached to a 40 mm × 100 mm sheet piece at each part of FTT 111 and 111 ′, According to an experiment in which 1 kg of a weight was applied for 2 seconds and then peeled at a tensile strength of 300 mm / min and the range of the peak value was measured, the conventional disposable diaper 100 had a peel force of 240 g or more. On the other hand, in the case of the paper diaper 100 ′, it is in the range of 110 to 1000 g, and it is also confirmed that the value does not cause delamination.
[0031]
Further, according to the above configuration, even if light is applied to the FTT 111 'portion, it does not shine, and the viewer always feels as a soft cloth, so that the quality of the paper diaper 100' is improved.
[0032]
Furthermore, the bulky portion is eliminated by the above configuration, so that the paper diaper 100 'can be easily handled, and in addition, the transportability is improved and the manufacturing cost is reduced as compared with the conventional one. is there.
[0033]
As described above, the content of the present invention has been described based on one embodiment, but the present invention is not necessarily limited to such an embodiment, and various changes can be made in the configuration.
[0034]
In the present invention, it is preferable to use the SMS type nonwoven fabric as described above as the nonwoven fabric constituting the FTT substrate, but it is also possible to configure this nonwoven fabric only with a spunbond type nonwoven fabric consisting of a single layer or a plurality of layers. In addition, although a layer configuration of only a melt-blowing nonwoven fabric is also conceivable, in this case, it is not preferable because the layer thickness cannot be reduced from the viewpoint of transportability in the manufacturing process, and thus the manufacturing cost increases. .
[0035]
【The invention's effect】
As described in detail above, according to the disposable disposable diaper according to the present invention, the presence of the thin and flexible FTT does not impair the air permeability at the upper abdomen position of the front body, and therefore the abdomen of the wearer And the fastening tape can be peeled off from the FTT with an appropriate peeling force, so that delamination does not occur, and furthermore, the softness of the fabric which can be favorably given in terms of quality is always obtained. And an extremely remarkable effect that it is easy to handle and can be manufactured at low cost.
[Brief description of the drawings]
FIG. 1 is a partially sectional plan view of a main body of a disposable disposable diaper according to an embodiment of the present invention, which is developed from a back surface side.
FIG. 2 is an enlarged view of a main part of a section taken along line XX in FIG.
FIG. 3 is a cross-sectional view showing a layer structure of an FTT which is a main part of the present invention.
FIG. 4 is a partial cross-sectional plan view of the main body of the conventional disposable disposable diaper, as viewed from the back surface side.
FIG. 5 is a perspective view showing a usage mode of the disposable disposable diaper.
FIG. 6 is an enlarged view of a main part of the conventional disposable paper diaper shown in FIG.
[Explanation of symbols]
100 (conventional) disposable paper diaper 100 '(according to the present invention) disposable paper diaper 101 diaper body 102 topsheet 103 backsheet 104 absorber 109b back position 109f abdomen position 110 fastening tape 111 (conventional) disposable paper diaper FTT
111 'FTT (according to the invention) disposable disposable diaper
111a Base of FTT (conventional) disposable diaper 111'a Base of FTT of disposable diaper (according to the invention) 112 Waterproof film 113 Crepe paper

Claims (5)

A liquid-permeable top sheet covering the front side, a liquid-impermeable back sheet covering the back side, an absorber interposed between the respective sheets, and a diaper stopper fixed to both outer back sides of the back sheet. A front body and a back body are formed by folding a diaper main body having a worn fastening tape from a central portion in a longitudinal direction, and the fastening tape is attached to an upper surface of an abdominal position of the front body by FTT (Frontal. A tape-type disposable disposable diaper to be fastened to a target tape), wherein the FTT is constituted by a base made of non-woven fabric and a fastening member provided on an upper surface of the base and engaged with the fastening tape. And disposable disposable diapers. The disposable paper diaper according to claim 1, wherein the nonwoven fabric is an SMS (spunbond / meltblown / spunbond) nonwoven fabric. The disposable paper diaper according to claim 1 or 2, wherein the fastening member is a female material that engages with a male material provided on the fastening tape. The disposable paper diaper according to any one of claims 1 to 3, wherein the FTT has an air permeability of 1.0 to 25 seconds / 300cc. The disposable paper diaper according to any one of claims 1 to 4, wherein a peeling force between the fastening tape and the FTT is 110 to 1000 g.

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