JP3754636B2 - Attaching method of fastening means in disposable diaper - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a method of attaching fastening means in a disposable diaper, and more particularly, to a method of attaching fastening means for joining the waists of the front and rear bodies of the diaper so as to be peelable from each other.
[0002]
[Prior art]
As shown in FIG. 3, in general, this fastening means temporarily attaches the adhesive surface 1 to the fastening tape (fastening tape) 3 provided with the adhesive surface 1 on the inner surface and the non-adhesive gripping portion 2 on the tip. It is composed of a release tape (release tape) 4 and is attached to the waistline side 5 of the back body of the diaper. In other words, in a state where the fastening tape 3 is superposed on the release tape 4, the non-adhesive gripping portion 2 is retracted from the tip 7 of the release tape 4 fixed to the upper surface of the waistline side portion 5 by the adhesive surface 6. The tip 7 of the release tape 4 is formed so as to protrude from the tip of the non-adhesive gripping portion 2. This is to make it easy to peel the fastening tape 3 from the release tape 4 by gripping the non-adhesive gripping portion 2.
[0003]
[Problems to be solved by the invention]
However, a tape combination comprising superposed adhesive surface 1 of the fastening tape 3 on the release surface of the release tape 4, the diaper manufacturing line, the smooth press surface from the upper surface of the fastening tape 3 on the portion of the diaper press When the tip 7 of the release tape 4 protrudes from the non-adhesive gripping portion 2 of the fastening tape 3 when it is pressed with a member and attached to the diaper waistline side portion 5, the tip 7 and the non-adhesive gripping portion 2 Since there is a step in between, the tip 7 is not sufficiently pressed, and as a result, the tip 7 is often not sufficiently joined to the waistline side portion 5 by the adhesive surface 6. As one means for solving this problem, it is conceivable to use the press member in which the press surface is formed so as to match the step. However, even if such a press member is used, the combination tape has flexibility, and it is necessary to operate diaper components including the tape at a high speed on the diaper production line for low-cost mass production of diapers. For this reason, misalignment is likely to occur between the portion of the press surface and the step surface, and it cannot be said that the intended purpose can be achieved.
[0004]
As described above, if the tip 7 of the release tape 4 is not sufficiently joined, the tip 7 may be lifted or turned up due to the movement of the diaper or the sliding contact between the tip 7 and the skin of the wearer. is there. As a result, the skin is rubbed at the tip and rashed or damaged. This is a serious problem that cannot be overlooked when the wearer is a newborn.
[0005]
An object of the present invention is to eliminate the above-mentioned problem by changing the relative positions of the non-adhesive gripping portion of the fastening tape and the tip of the release tape in the conventional fastening means.
[0006]
[Means for Solving the Problems]
The present invention provides a fastening means for joining the waist portions of the front and rear bodies to each other, a fastening tape having an inner surface and an outer surface, a first adhesive surface on the inner surface and a non-adhesive gripping portion on the tip, and an inner surface and an outer surface. the a, the barrel rotating Ri is provided a second adhesive surface for bonding the inner sheet side to the inner surface constitutes a first adhesive surface and a release tape to temporarily attached superposed on said outer surface, In the attachment method of the fastening means in the disposable diaper for joining the fastening means to the waistline side part, the tip of the fastening tape is folded back to the first adhesive surface to form the non-adhesive gripping part having a tip and a base end. And a part of the non-adhesive gripping portion protrudes from the tip of the release tape to a thickness greater than the combined thickness of the second adhesive surface and the release tape, and the tip of the template tape is Between the tip and the base end of the holding part And wherein the first adhesive surface of said fastening tape to be located between the release tape and temporarily attached overlay an outer surface constituting said fastening means is introduced into the diaper manufacturing line, the second adhesive surface Is pressed onto the inner surface sheet of the waistline side portion by pressing the fastening means from the outer surface side of the fastening tape with a press means having a smooth press surface. The attachment method is characterized by joining.
[0007]
In a preferred embodiment, the fastening tape, are without a bonding strength between the release surface of the release tape with the adhesive surface of that to 150g or less.
[0008]
[Action]
Since non-adhesive gripper portion of the fastening tape is to protrude from the distal end of the release tape, in other words, because the tip is brought into contact with the lower surface of the non-adhesive gripper unit, these fastening tapes and away When the mold tape is pressed from the outer surface side of the fastening tape and bonded and attached to a predetermined part of the diaper, the tip is also fixed at least in the same manner as other parts of the release tape.
[0009]
And gripper fingertips said non-adhesive gripper portion, the first adhesive surface of said fastening tape when it is peeled from the release surface of the release tape to temporarily attached, be enhanced how the peel rate, That is, even if it peels instantaneously, the said release tape does not peel from the inner surface of the diaper which is the fixed surface not only at the tip but also at other parts. This is because not only the first adhesive surface of the fastening tape is not bonded to the tip of the release tape, but also the bonding (temporary bonding) strength between the first adhesive surface and the release surface of the release tape. This is because the value is set to a predetermined value or less.
[0010]
【Example】
With reference to the drawings, a disposable diaper according to the present invention, particularly an embodiment of its fastening means, will be described as follows.
[0011]
FIG. 1 shows a known disposable diaper 12 in which the fastening means 10 is provided on the waist-opposing side portion 11 of the back body. The diaper 12 has a liquid-permeable inner sheet 13, an impermeable outer sheet 14, and a liquid-absorbing panel 15 interposed therebetween , and elastic members 16a and 16b are attached around the legs and the trunk. It is. As is well known, the fastening means 10 is provided to join the opposing side portion 11 of the back body and the opposing side portion 17 of the front body provided with the means.
[0012]
As shown in FIG. 2, the fastening means 10 includes a fastening tape 20 and a release tape 21. With some form a first adhesive surface 22 by applying a known pressure-sensitive adhesive on the inner surface of the fastening tape 20, Ri tare to form a non-adhesive gripper unit 23 by folding the distal end of the fastening tape 20, the opposite end has a proximal end 24. A second adhesive surface 25 is formed on the inner surface of the release tape 21 by applying a material having the same effect as the adhesive. The release tape 21 is bonded and fixed to the inner surface of the inner sheet 13 of the waistline side portion 11 with a second adhesive surface 25. The fastening tape 20 joins and fixes the base end portion 24 to the lower surface (outer surface) of the outer surface sheet 14 of the waistline side portion 11, and the main portion 26 including the non-adhesive gripping portion 23 is folded back toward the release tape 21. One adhesive surface 22 is temporarily attached to the release surface which is the outer surface of the release tape 21. In this state, a part of the non-adhesive gripping portion 23 protrudes from the distal end 27 of the release tape 21, in other words, the distal end 27 and the proximal end 28 of the non-adhesive gripping portion 23. The length of the main body portion 26 is set so as to be located in the middle of 29.
[0013]
When the front end 28 of the non-adhesive gripping portion 23 and the front end 27 of the release tape 21 coincide with each other, it is difficult to grip the non-adhesive gripping portion 23, and the front end 27 of the release tape 21 is not attached to the non-adhesive gripping portion 23. If it is located on the base end 29 and the outer side (right side in the figure), it is difficult to grip and the first adhesive surface 22 also contacts the tip 27. easily separated from the 21, moreover, the bonding strength between the release surface of the first adhesive surface 22 and a release tape 21 (peeling strength), when peeling the fastening tape 20, tip 27 is peeled off, curling, or floated There is a risk of doing.
[0014]
The bonding strength is preferably 150 g or less. In this strength measurement method, the non-adhesive gripping portion 23 is gripped by a chuck of a tester, and the first adhesive surface 22 of the main portion 26 of the fastening tape 20 is pulled in the peeling direction (clockwise in FIG. 2). Depending on the time value (g). If this value is 150 g or less, even if the fastening tape 20 is peeled off quickly, that is, instantaneously, the release tape 21 peels off not only the tip 27 but also other parts from the upper surface of the waistline side portion 11. Turn over, never lift up.
[0015]
As already described, the fastening tape 20 and the release tape 21 constituting the fastening means are introduced into the diaper production line in a state of being overlapped as shown in FIG. In the combined state, the fastening means is attached by pressing and joining from the outer surface side of the fastening tape 20 with the pressing means having a smooth press surface . As a result of the pressing at this time, the distal end 27 of the release tape 21 is understood from the fact that the total thickness of the two tapes 20 and 21 at the portion located in the release tape 21 is larger than the total thickness of the other portions of the two tapes. It will be the strongest press. Therefore, the tip 27 is firmly bonded to the inner sheet 13 positioned on the upper surface of the waistline side portion 11.
[0016]
As the adhesive for the fastening tape 20, the release tape 21, and the first and second adhesive surfaces 22 and 25, this kind of known adhesive, for example, the fastening tape 20 is a laminate sheet of fine paper or nonwoven fabric and a plastic film. The release tape 21 is made of a high-quality paper coated with a silicone resin on the upper surface (release surface), and the first and second adhesive surfaces 22 and 25 are of a so-called hot melt type. Can do. The inner sheet 13, the outer sheet 14, and the panel 15 are also of this kind, for example, the inner sheet 13 is a non-woven fabric or a porous plastic film, and the outer sheet 14 is a plastic film or a laminate sheet of this and a non-woven fabric. The panel 15 can be made of cotton-like or pulverized pulp blended with superabsorbent polymer particles.
[0017]
【The invention's effect】
According to the method of attaching the fastening means at the waistline side of the diaper according to the present invention, problems caused by peeling, turning, and lifting of the tip of the release tape, i.e., skin irritation, scratches, etc. of the wearer, can occur in advance. it can be attached to fastening means so that it is possible to prevent. Therefore, it is extremely safe to use for newborns.
[0018]
Furthermore, since the non-adhesive gripping portion of the fastening tape protrudes from the tip of the release tape, and a gap is formed between the protruding portion and the inner surface of the diaper, the gripping portion can be gripped very easily.
[Brief description of the drawings]
FIG. 1 is a developed inner plan view of a diaper partially broken.
FIG. 2 is an enlarged cross-sectional view taken along the line XX of FIG.
FIG. 3 is a cross-sectional view of a conventional fastening means.
[Explanation of symbols]
10 Fastening means 11 Girth side
12 Disposable diapers
13 Liquid-permeable inner sheet
14 Impervious outer sheet
15 Liquid Absorbing Panel 20 Fastening Tape 21 Release Tape 22 First Adhesive Surface 23 Non-Adhesive Pinch 25 Second Adhesive Surface 27 End of Release Tape 28 End of Fastening Tape

Claims (2)

Fastening means for joining the waistline side parts of the front and back bodies to each other, having an inner surface and an outer surface, a first adhesive surface on the inner surface and a fastening tape provided with a non-adhesive gripping portion on the tip, and an inner surface and an outer surface, and providing the second adhesive surface to be bonded with the inner sheet of the cylinder times Ri side to said inner surface, said first adhesive surface composed of a release tape to temporarily attached superposed on said outer surface, said fastening means In the attaching method of the fastening means in the disposable diaper joined to the waistline side,
A front end of the fastening tape is folded back to the first adhesive surface to form the non-adhesive gripping portion having a front end and a base end, and a part of the non-adhesive gripping portion is formed from the second adhesive surface and the mold release. The fastening tape protrudes from the tip of the release tape more than the total thickness of the tape and the tip of the template tape is positioned between the tip and the base of the non-adhesive gripping portion . The first adhesive surface and the outer surface of the release tape are overlapped and temporarily attached to constitute the fastening means and introduced into the diaper production line, and the second adhesive surface is connected to the inner surface of the waistline side portion. The fastening means is joined to the inner surface sheet of the waistline side portion by pressing the fastening means from the outer surface side of the fastening tape with a pressing means having a smooth press surface in a state of being superimposed on the sheet. installation method. The attachment method according to claim 1, wherein the fastening tape has a bonding strength between the first adhesive surface and the release surface of the release tape of 150 g or less.

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