JP4283151B2 - Disposable paper diapers - Google Patents

Description

  The present invention is provided with a side panel fixed to the back body, and provided with a fastening portion that engages and fastens the front body at the free end of the side panel. The present invention relates to a disposable disposable diaper.

In a conventional disposable paper diaper, a fastening portion provided with an engaging portion such as a mechanical fastener is provided on a side panel formed of a white nonwoven fabric or the like. The fastening portion is formed of substantially white of the same color as the side panel, and is folded inside the side panel to hold the engaging portion engaged with the side panel when the disposable paper diaper is manufactured. Therefore, when deploying the disposable paper diaper at the time of use, it is not easy to search for and spread the fastening portion folded inside the side panel.
On the other hand, a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided between these two sheets are provided, and side flaps are provided on both side edges in the longitudinal direction of the absorbent body. In the disposable diaper, a plurality of concave deformed portions are intermittently provided in at least a portion of the side flap along the longitudinal direction of the diaper and at least a portion of the engaging portion, and both deformed portions have substantially the same shape, A disposable paper diaper characterized in that the center points of the deformable portions coincide (for example, Patent Document 1).
JP 2003-116915 A

However, in such disposable paper diapers, although the rough position of the fastening portion can be understood by touching the concave deformed portion with a finger, the fastening portion is still difficult to distinguish from the side panel because it is not color-coded from the side flaps and side panels. There is a problem.
Then, the objective of this invention is providing the disposable paper diaper which made it easy to identify a fastening part from a side panel.

For this reason, the invention according to claim 1 is provided with a side panel fixed to the back body, and provided with a fastening portion that engages and fastens the front body at the free end of the side panel, In the disposable paper diaper where the fastening part is folded with the side panel inside,
The side panel is colored and an identification part for identifying the engagement part provided in the fastening part from the side panel is formed ,
The identification part is formed by embossing the peripheral part of the engagement part .

The invention according to claim 2 is the disposable paper diaper according to claim 1 , wherein the embossing applied to the identification portion is a character or a pattern.

According to a third aspect of the present invention, in the disposable paper diaper according to the first or second aspect , the tip of the fastening portion is a knob portion, and an embossing process is performed on a surface of the knob portion opposite to the engaging portion. It is characterized by that.

Invention of Claim 4 is a disposable diaper in any one of Claim 1 thru | or 3 , The area ratio of the said identification part with respect to the said fastening part is 5 to 50%, It is characterized by the above-mentioned.

  According to the first aspect of the present invention, since the side panel is colored and the identification part for identifying the engagement part provided in the fastening part from the side panel is formed, the fastening part is visually viewed from the side panel. It is possible to provide a disposable paper diaper that is lifted and easily identified.

Furthermore , according to the invention of claim 1 , since the identification part is formed by embossing the peripheral edge part of the engaging part, the engaging part and the side panel of the part embossed by the heat fusion action are provided. Once melted and solidified, the peripheral portion becomes substantially transparent, and the fastening portion can be visually identified with a simple configuration.

According to the invention of claim 2 , since the embossing applied to the identification part is a character or a pattern, the size of the disposable paper diaper can be easily identified by adding size information of the disposable paper diaper, for example. . Moreover, designability improves by providing a pattern.

According to the invention of claim 3 , since the tip of the fastening portion is a knob portion and the embossing is performed on the surface opposite to the engaging portion of the knob portion, the knob portion is curved to the opposite side of the engaging portion. Accordingly, the knob portion is easily entangled with the hand, and the fastening portion that is easily picked and engaged with the knob portion can be peeled off from the side panel or the front body, so that the disposable paper diaper can be easily attached.

According to invention of Claim 4 , since the area ratio of the identification part with respect to a fastening part is 5 to 50%, a fastening part can be easily peeled off, maintaining appropriate engagement force.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a developed view of a disposable paper diaper according to the present invention. The disposable paper diaper includes a back sheet 12 provided with a notch 40 at a substantially central portion of the long side of the rectangle, a liquid permeable top sheet 11 formed of a non-woven fabric or film having a plurality of mesh-like holes, and a rectangular shape, An absorbent body 13 in which a polymer absorbent polymer is dispersed in a cotton-like pulp interposed therebetween is provided. The surface of the absorber 13 is covered with tissue paper 18 for absorption. Furthermore, the absorber 13 includes an upper layer absorber 14 positioned on the top sheet 11 side and a lower layer absorber 15 positioned on the back sheet 12 side.

  Further, a three-dimensional gather (not shown) is provided so as to substantially follow both longitudinal edges of the absorbent body 13, and a gather sheet 26 constituting the three-dimensional gather is composed of a back sheet 12 and a front body 16 and a rear body of a disposable paper diaper. 19 are provided on side flaps 21A, 21B, 22A, 22B extending to the left and right sides.

As shown to Fig.2 (a), (b), the side panel 23B is fixed and provided in the free end side of the side flap 22B of the back body. One end of the side panel 23B is fixed to the side flap 22B to serve as a fixed end, and the other end is provided with a fastening portion 24 that engages and fastens to the front body 16 to serve as a free end.
A side panel 23A is similarly fixedly provided on the free end side of the side flap 22A. One end of the side panel 23A is fixed to the side flap 22A to serve as a fixed end, and the other end is provided with a fastening portion 24 that engages and fastens to the front body 16 to serve as a free end. The panel base material 25 of the side panels 23A and 23B is colored, for example, light blue (for men) or pink (for women) by letterpress printing, screen printing, offset printing, gravure printing, inkjet printing, or the like.
That is, the rear body 19 has side flaps 22A and 22B, side panels 23A and 23B are fixed to both sides of the side flaps 22A and 22B, and the front body 16 and the free ends of the side panels 23A and 23B. In an unfolded diaper in which a fastening portion 24 that is engaged and fastened is provided, and the fastening portion 24 is folded with the side panels 23A and 23B inside during manufacture, the side panels 23A and 23B are colored and the fastening portion The identification portion 24E is formed by embossing for identifying the engagement portion 27 included in the reference numeral 24 from the side panels 23A and 23B.

Specifically, as shown in FIGS. 3A and 3B, the fastening portion 24 is formed of a nonwoven fabric or the like and is formed at the free end portion of the colored panel base material 25, and the tip portion is a knob portion 28. The engaging portion 27 made of a male mechanical fastener is provided on the fixed end side. The engaging portion 27 adheres the bottom surface 27B to the panel substrate 25 with a hot melt adhesive or the like, and embosses the peripheral portion 27M to form the identification portion 24E.
In addition, 2-60% with respect to the area of the engaging part 27 is suitable for the identification part 24E, More preferably, it is 5-50%.

By the way, the peripheral part 27M of the panel base material 25 and the engaging part 27 is fused by the heat of embossing. Therefore, at the peripheral edge portion 27M, the panel base member 25 and the engaging portion 27 are once melted and solidified again to become nearly transparent, and the engaging portion 27 can be easily removed from the side panel 25 from either direction E1 or E2. It becomes easy to distinguish.
At this time, the embossing to be applied to the peripheral portion 27M may be provided by, for example, a disposable paper diaper size by characters 29 such as M, or by a pattern 29a such as a star shape as shown in FIG.
By the way, the tip of the fastening portion 24 is a knob portion 28, and an embossing E is continuously applied in the longitudinal direction of the disposable diaper on the surface opposite to the engaging portion 27 of the knob portion 28 as shown in FIG. May be applied.

The top sheet 11 used in the present invention is a liquid-permeable nonwoven fabric, woven fabric, porous plastic film, or the like, and the constituent fibers thereof are single fibers such as polypropylene, polyethylene, polyester, nylon, or polyester, polypropylene, The composite fibers are composed of two or more components such as polyethylene and nylon. Particularly, polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are preferable from the viewpoint of strength, but are not particularly limited.

  The back sheet 12 and the panel base material 25 used in the present invention are, for example, a liquid impermeable film such as PE (polyethylene), a material obtained by bonding a liquid impermeable film and a nonwoven fabric or a woven fabric. When using a liquid-impermeable film, a polyethylene film provided with a large number of micropores that do not allow liquid to permeate, and a film with moisture permeability stretched by adding a filler to a thermoplastic resin. Or, if a composite sheet with non-woven fabric or woven fabric bonded to the outside of these films is used, excess moisture in the absorbent pad is released to the outside of the absorbent pad in the form of gas, so that stuffiness and blurring are less likely to occur. The moisture permeability and the touch can be made comfortable. The back sheet 12 may be made of a liquid-permeable material such as a nonwoven fabric.

  The absorber 13 used in the present invention is made of cotton-like pulp, a superabsorbent polymer (hereinafter referred to as “SAP”), a hydrophilic sheet or the like, and is not particularly limited. Moreover, the absorber used in this invention is made from the well-known absorbent material normally used in the conventional disposable paper diaper and other absorbent articles.

  That is, a single layer or multilayer mat in which absorbent fibers such as cotton-like pulp and rayon and SAP are mixed, or one in which SAP is uniformly arranged between layers of absorbent fibers is wrapped with a hydrophilic sheet. The formed one can be used.

As the cotton-like pulp, a chemical pulp sheet or one obtained by defibrating a mechanical pulp sheet with a pulverizer is used. Pulp raw materials are not limited to conifers, but hardwoods, straw, bamboo and kenaf are also applicable. In addition, waste paper pulp may be used. The amount of use of the cotton-like pulp varies depending on the intended absorber, for example, whether it is used singly, or a plurality of layers are laminated, or another absorbent is used in combination. 600 g / m ² .

  Examples of SAP include starch, cellulose, and synthetic polymer. That is, starch-acrylic acid (salt) graft copolymer, saponified product of starch-ethyl acrylate graft copolymer, saponified product of starch-methyl methacrylate graft copolymer, saponified product of starch-acrylonitrile graft copolymer Saponified starch-acrylamide graft copolymer, acrylic acid (salt) polymer, polyethylene oxide cross-linked with acrylic acid, cross-linked product of sodium carboxymethyl cellulose, cross-linked product of polyvinyl alcohol-maleic anhydride reaction product, etc. Can be used.

  As a compression method of the absorbent body 13, the absorbent body 13 may be compressed into a continuous surface shape with a roll having a smooth circumferential surface so that the density of the absorbent body is substantially uniform over the entire surface. Depending on the shape of the roll or the like, the density of the absorbent body may be partially different, and it may be compressed so as to be embossed in a pattern arrangement that guides urine and body fluid in the longitudinal direction and the oblique direction. In the case of embossing, the compression part and the non-compression part may be either continuous or discontinuous.

  As the gather sheet 26 used in the present invention, a water-repellent nonwoven fabric or woven fabric, a liquid impermeable film such as polyethylene, and a material obtained by bonding the liquid impermeable film to the nonwoven fabric or woven fabric can be used. . When using a liquid-impermeable film, a polyethylene film with a large number of micropores that do not allow liquid molecules to permeate to prevent stuffiness, and a moisture-permeable film that is stretched by adding a filler to a thermoplastic resin A film is preferred.

  When using a nonwoven fabric or a woven fabric, the constituent fiber is a single fiber such as polypropylene, polyethylene, polyester, nylon, or a composite fiber composed of two or more components such as polyester, polypropylene, polyethylene, nylon, etc. Polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers are preferable from the viewpoint of strength, but are not particularly limited.

  Elastic members used for three-dimensional gathers are natural, synthetic rubber, urethane and other thread-like, string-like, net-like, flat-type absorbent pads for normal men, and elastic elastic bodies used in ordinary absorbent articles Can be used. The number of elastic members used may be one or more. The elastic elastic body is placed in a stretched state, and it is made into a water-repellent material by hot melt, starch-based or water-soluble glue such as CMC (carboxymethylcellulose), high fluidity adhesive, or welding by heat or ultrasonic waves. Bonded and fixed.

Next, an embodiment of the disposable paper diaper having the above-described configuration is shown in FIG.
Among the identification parts 24E, the width of the identification part 24E1 on the free end side of the fastening part 24 is a1, the length is b, the width of the identification part 24E2 is a2, the length is d, and the identification part 24E1 and the identification part The distance between the left and right ends of the engaging portion 27 including 24E2 is c.
b = 40mm
c = 24mm
d = 50mm
Then, the area A of the engagement part 27 including the identification part 24E1 and the identification part 24E2 is
A = (b + d) / 2 × c
= (40 + 50) / 2x24
= 1080mm ²
It becomes.
Further, the area ratio B of the identification part 24E occupying the area A of the engagement part 27 is
B = (a1 + a2) / c × 100
= (A1 + a2) / 24 × 100%
It becomes.

The shear strength of the fastening portion 24 configured in this way is measured by the following test method.
(1) The fastening part (male material of the mechanical fastener) 24 having an area (engagement area) A of 1080 mm ² is set on the upper side, and the female material of the mechanical fastener separately prepared is set on the lower side, and both are engaged.
(2) The fastening portion 24 and the female material of the mechanical fastener are pressure-bonded by reciprocating in the CD direction once from the upper side of the fastening portion 24 with a roller having a mass of 2 kg.
(3) Attached to the tensile tester as it is, and pulled in the shear direction at a tension speed of 300 mm / min with a chuck distance of 50 mm, a shear strength C is obtained.
By changing the width of the identification portion 24E1 to a1 and the width of the identification portion 24E2 to a2 by the above test method, the area ratio B of the identification portion 24E occupying the area A of the engagement portion 27 is changed to change the width of the fastening portion 24. The results of measuring the shear strength C are shown in Table 1 below. At that time, sensory evaluation was performed on the interview rate B of the identification part 24E with respect to the fastening part 24.

  From Table 1 above, if the area ratio B of the identification part 24E with respect to the fastening part 24 is too small, the shear strength C is lowered and the engaging force of the fastening part 24 is insufficient. Moreover, when the area ratio B is too large, it will be understood that the fastening part 24 is difficult to peel off and the sensory evaluation is lowered. Therefore, it was found that the area ratio B of the identification part 24E with respect to the fastening part 24 is optimally 5 to 50%.

It is a top view of the disposable paper diaper of this invention. It is an enlarged view of the side flap part of the disposable paper diaper of FIG. 1, (a) is the top view, (b) is AA sectional drawing of (a). (A) of the fastening part of the disposable paper diaper of FIG. 1 is an enlarged plan view, (b) is BB sectional drawing of (a). It is a top view which shows another example of the fastening part of Fig.3 (a). It is a top view which shows the Example of the disposable paper diaper of this invention.

Explanation of symbols

11 Top sheet 12 Back sheet 13 Absorber 14 Upper layer absorber 15 Lower layer absorber 16 Front body 18 Tissue paper 19 Rear body 21A, 21B, 22A, 22B Side flap 23A, 23B Side panel 24 Fastening part 24E, 24E1, 24E2 Identification Part 25 Panel base material 26 Gather sheet 27 Engagement part 27B Bottom face 27M Peripheral part 28 Knob part 29 Character 29a Pattern 40 Notch E Embossing

Claims (4)

A side panel is fixed to the back body, and a fastening part that engages and fastens the front body is provided at the free end of the side panel, and the fastening part is folded with the side panel inside when manufactured. In disposable disposable diapers,
The side panel is colored and an identification part for identifying the engagement part provided in the fastening part from the side panel is formed ,
The disposable paper diaper characterized in that the identification part is formed by embossing the peripheral part of the engaging part . The disposable diaper according to claim 1 , wherein the embossing applied to the identification part is a character or a pattern. The disposable paper diaper according to claim 1 or 2 , wherein a tip of the fastening part is a knob part, and an embossing process is performed on a surface of the knob part opposite to the engaging part. The disposable diaper according to any one of claims 1 to 3 , wherein an area ratio of the identification part with respect to the fastening part is 5 to 50%.

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