JP6933131B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article such as a disposable diaper that is attached to the inseam of a wearer to absorb and retain a liquid such as urine.

For absorbent articles such as disposable diapers, an absorber is provided between the liquid-permeable top sheet and the liquid-impermeable back sheet so that the absorbent body can absorb and hold liquid such as urine through the top sheet. It has become.
In such an absorbent article, it is known that the absorbent body is divided to fit the wearer's body in order to improve the wearing feeling of the wearer (see Patent Documents 1 and 2 and the like).
On the other hand, especially for disposable diapers for infants and the like, patterns and characters are printed in addition to the surface color, etc., just like clothes, so that users and wearers can use them happily. For example, a design is known in which a design is printed on the surface of the back sheet so that the design on the surface of the back sheet can be visually recognized through a cover sheet arranged on the outside of the back sheet. In addition, it is well known that a pattern such as a character is directly printed on the surface of the cover sheet.

When manufacturing such a disposable diaper, it is common to print the above-mentioned pattern on a continuous body of a cover sheet or a back sheet in advance at predetermined intervals and supply it to a disposable diaper manufacturing line while pulling it out. Therefore, it is necessary to align the symbols so that the symbols are arranged at predetermined positions, and the phase detection mark for the alignment is printed on the continuous body of the cover sheet and the back sheet together with the symbols. Then, Patent Document 3 and the like disclose a technique of detecting this phase detection mark using an optical sensor and aligning the symbol so that the symbol is arranged at a predetermined position based on the detection information.

JP-A-2017-80104 Japanese Unexamined Patent Publication No. 2016-67366 Japanese Unexamined Patent Publication No. 2005-80827

However, in this type of disposable diaper, not only the design but also the phase detection mark is visually recognized, so that there is a problem that the appearance of the disposable diaper is impaired by the phase detection mark.

Therefore, an object of the present invention is to provide an absorbent article capable of improving the appearance by making the phase detection mark inconspicuous while improving the wearability.

As a result of diligent studies to solve the above problems, the present inventors provide an absorbent article in which the absorber is divided into a plurality of parts in the longitudinal direction of the absorbent article and a phase detection mark is formed at the divided position of the absorber. As a result, it was found that the above problems could be solved, and the present invention was reached.

The absorbent article of the present invention is an absorbent article including a first sheet, a second sheet, and an absorber arranged between the first sheet and the second sheet, and the absorbent body is longitudinal. The first sheet is divided into a plurality of directions, and at least one phase detection mark is attached to the first sheet at a position corresponding to the divided portion of the absorber.

According to the present invention, it is possible to provide an absorbent article capable of improving the appearance by making the phase detection mark inconspicuous while improving the wearability.

It is a developed view which shows the example of the absorbent article which concerns on this invention. It is an exploded view which shows the example of the absorbent article which concerns on this invention. It is the schematic which shows the example of the absorber used for the absorbent article which concerns on this invention.

Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments.

The present invention relates to an absorbent article 10 comprising a first sheet, a second sheet, and an absorber disposed between the first and second sheets. 1 and 2 show a development view and an exploded view of one embodiment of the present invention.

[1] 1st sheet The 1st sheet 2 is a sheet that sandwiches an absorber 3 with a 2nd sheet 4 to form an absorbent article 10, and is a side opposite to the side in contact with the wearer's skin. It is a sheet that forms the surface of.

On the first sheet 2, a pattern (not shown) such as a pattern or a character is attached by printing, and at a position (divided position 20) corresponding to a divided portion of the absorber 3 described later, on both sides in the width direction. Two phase detection marks 21 are printed on each side along the longitudinal direction of the first sheet 2. The symbols are printed on the continuous first sheet 2 at predetermined intervals along the longitudinal direction thereof. The phase detection mark 21 is printed on the continuous first sheet 2 in the longitudinal direction at the same interval as the symbol, and the phase detection mark 21 is aligned so that the symbol is arranged at a predetermined position of the absorbent article 10. It is a mark that is detected. Specifically, the phase detection mark 21 is used for aligning a symbol by, for example, a well-known technique disclosed in Patent Document 3. At least one phase detection mark 21 may be attached to the divided position 20 of the absorber 3, and may be attached to the first sheet 2 only on one side in the width direction thereof, or in the longitudinal direction of the first sheet 2. Only a single unit may be given along with. The size of the phase detection mark 21 in the longitudinal direction is smaller than the width dimension between the divided absorbers.

The first sheet 2 may be a back sheet or a cover sheet as long as it is a sheet to which the phase detection mark 21 is attached. In the embodiments described in FIGS. 1 and 2, the back sheet 2 is the first sheet.

The back sheet 2 is a member for preventing the liquid that has passed through the second sheet 4 and absorbed by the absorber 3 from leaking out. Therefore, the back sheet 2 is made of a liquid-impermeable material. Then, the back sheet 2 is arranged so as to cover the bottom surface of the absorber 3 in order to prevent liquid leakage from the bottom surface of the absorber 3.

An example of the impermeable material constituting the back sheet 2 is a liquid impermeable film made of polyethylene resin. In particular, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed.

In one embodiment of the present invention, as shown in FIG. 2, a cover sheet 1 for improving the feel is attached to a surface of the back sheet 2 opposite to the surface facing the absorber 3, and the cover sheet is attached. The design of the back sheet 2 and the phase detection mark 21 can be visually recognized through 1.

As a material constituting the cover sheet 1, a woven fabric or a non-woven fabric is used. In particular, as a material constituting the cover sheet, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polyethylene, polypropylene, or polyester, or a wet non-woven fabric.

[2] Second sheet The second sheet 4 is a member that sandwiches an absorber together with the first sheet 2 and directly contacts the skin of the wearer's inseam to allow a liquid such as urine to permeate through the absorber 3. be. Therefore, the second sheet 4 is made of a highly flexible liquid permeable material. The second sheet 4 is also called a top sheet and is arranged so as to cover the surface of the absorber 3. Examples of the impermeable material constituting the second sheet 4 are a woven fabric, a non-woven fabric, or a porous film. Further, for example, fibers of a thermoplastic resin such as polypropylene, polyethylene, polyester or nylon may be hydrophilized to be further made into a non-woven fabric.

[3] Absorber The absorber 3 is a member for absorbing a liquid such as urine and holding the absorbed liquid. The absorber 3 is arranged between the first sheet 2 and the second sheet 4. The absorber 3 has a function of absorbing the liquid that has passed through the second sheet 4, and is made of an absorbent material.

As the absorbent material constituting the absorber 3, a known material can be adopted. As the absorbent material, for example, fluff pulp, rayon, or a super absorbent polymer (hereinafter, also referred to as SAP) can be used. Further, as the absorbent material, one kind of fluff pulp, SAP, or a hydrophilic sheet may be used alone, or two or more kinds may be used in combination. A combination of fluff pulp and a highly absorbent polymer can be preferably used.

The absorbent material is usually formed in the form of a single-layer or multi-layer mat and used. As the absorbent material, one type may be used alone, or two or more types may be used in combination.

The absorber 3 is divided into a plurality of parts in the longitudinal direction. In the present embodiment, it corresponds to the front body part, the inseam part, and the back body part, and is divided into three parts, a front body part absorber 3a, an inseam part absorber 3b, and a back body part absorber 3c. In the present invention, "the absorber is divided" means that the absorber 3 is physically divided at the divided position 20 and the thickness at the divided position 20 is compared with other parts of the absorber 3. , Including the case where it is 1/5 or less.

In another embodiment of the invention, the absorber is split in two. In that case, the division position 20 may be provided so that the absorber 3 is evenly divided, or the absorber 3 may be provided so as to be unevenly divided. Preferably, the absorber on the front body side is divided so as to be large (see FIGS. 3 (a) and 3 (b)).

The shape of the absorber 3 can be appropriately designed according to the shape, size, and application of the disposable diaper (see FIGS. 3 (a), (b), (g), and (h)). For example, the shape of the absorber 3 may be rectangular, oval, gourd, or hourglass. The hourglass type means that both side edges of the absorber 3 have extending portions extending outward in the width direction in the front body portion and the rear body portion.

As shown in FIGS. 3 (c) to 3 (f), the absorber 3 may be provided with a groove along the longitudinal direction on the surface on the top sheet 4 side. Preferably, a plurality of grooves are provided in each of the divided absorbers. When the absorber 3 is divided into three parts corresponding to the front body part, the inseam part and the back body part, as shown in FIGS. 3 (c) and 3 (d), the front body part absorber 3a and the inseam absorption Grooves 3d are provided in each of the body 3b and the back body absorber 3c. As shown in FIGS. 3C to 3F, the groove 3d of the inseam absorber 3b may be formed over the entire area from one end to the other end in the longitudinal direction of the inseam absorber 3b. On the other hand, the grooves 3d of the front body absorber 3a and the back body absorber 3c are formed from one end facing the inseam absorber 3b to the intermediate portion thereof, as shown in FIGS. 3 (c) and 3 (d). You may. As shown in FIGS. 3 (c) to 3 (f), when a groove is provided along the longitudinal direction on the surface of the absorber 3 on the top sheet 4 side, the liquid absorbed by the crotch absorber 3b is absorbed. It can diffuse and be absorbed along the groove to the front body absorber 3a and the back body absorber 3c. Further, as shown in FIGS. 3 (e) and 3 (f), in other embodiments, the front body absorber 3a and the back body absorber 3c are not formed with grooves, and the inseam absorber is not formed. A groove 3d is formed only in 3b.

As the absorber 3 of the present invention, one in which the absorbent material is held by a hydrophilic sheet can also be used. For example, a hydrophilic sheet having a layer of SAP on one side, a sheet having SAP sandwiched between two hydrophilic sheets, or a sheet having a hydrophilic sheet on the surface of an absorbent material is used. can do. In particular, the so-called "core wrap type absorber", in which a water-absorbent material is used as a core and the whole is wrapped with a core wrap (not shown) of a hydrophilic sheet such as tissue, is an expression of the water-absorbent material which is the core. And leakage are prevented, which is preferable.

As the core wrap, for example, a hydrophilic sheet such as tissue, absorbent paper, or a hydrophilic treated non-woven fabric can be used. The basis weight is in the range of 5 to 40 g / m ² , preferably the basis weight is in the range of ^{10 to 30 g / m 2.}

As the absorber 3, each of the divided absorbers 3 may be wrapped with a core wrap, or a plurality of the divided absorbers 3 may be wrapped with the same core wrap. When the plurality of divided absorbers 3 are wrapped in the same core wrap, the thickness of the divided position 20 is 1/5 or less of the other portions.

[4] Absorbent article As shown in FIG. 2, in the absorbent article 10 of the present invention, the absorber 3 is arranged between the first sheet 2 and the second sheet 4. The absorber 3 may be coated with a core wrap.

Further, a diffusion sheet (not shown) may be provided between the second sheet 4 and the absorber 3. The diffusion sheet is for preventing the liquid taken in from the second sheet 4 from returning. The diffusion sheet is preferably a sheet having a higher liquid permeation rate than the second sheet 4. According to this, the liquid absorbed from the second sheet 4 side can be quickly transferred to the absorber to improve the absorption performance. The diffusion sheet is sometimes referred to as a backtracking prevention sheet, an intermediate sheet or a second sheet.

Further, in the absorbent article 10 of the present invention, the side sheet 5 may be provided on the upper part of the second sheet 4 along the longitudinal direction of the absorbent article 10. The side sheet 5 can stand up along both side edges of the absorber 3 when worn to prevent urine leakage and / or urine exudation.

Since the absorber 3 of the present invention does not exist or is thinned at the split position 20, the absorbent article 10 of the present invention is wrinkled or folded at the split position 20 while being worn by the wearer. Form a lump. As a result, the phase detection mark 21 imparted to the divided position 20 of the first sheet 2 is embedded in the fold, and is inconspicuous in appearance and the appearance is improved. Further, since the division position 20 is wrinkled or folded, wrinkles or the like are less likely to occur in other areas, and the visibility of the portion with the pattern or the pattern can be improved.

Further, since the absorber 3 of the present invention is divided into a plurality of parts, the absorber easily fits the line and movement of the wearer and has high wearability. Further, since the divided absorber 3 can be adhered more firmly, it is possible to suppress the twisting of the absorber during packaging and wearing.

The absorbent article 10 of the present invention can be used as a disposable diaper. The disposable diaper may be an unfolded type as shown in FIG. 1 or a pants type (not shown). In the case of the deployable type, a front patch 27 is provided on the front surface of the waist of the front body, a paper diaper is applied so as to cover the inseam of the wearer, and then a fasting tape 26 provided on the back body is attached to the front patch 27. Match and wear. At that time, since the waist elastic elastic member 23 gives expansion and contraction to the waist portion, it fits the wearer's body and the fit to the wearer is improved.

Further, as shown in FIG. 1, the paper diaper according to the present invention is provided with the leg elastic elastic member 22 to fit around the base of the leg of the wearer, improve the wearability during operation, and the base of the leg. It is possible to prevent the leakage of urine from the body.

Further, the paper diaper according to the present invention may further have a three-dimensional gather portion 25 in which the three-dimensional gather elastic elastic member 24 is attached to the non-woven fabric (see FIG. 1). Since the three-dimensional gather portion 25 serves as a leak-proof wall for urine in an upright state (a state in which the three-dimensional gather elastic elastic member 24 is contracted), urine that could not temporarily penetrate the second sheet 4 or the absorber 3 causes the three-dimensional gather portion 25 to act as a leak-proof wall. It is possible to prevent the urine that has been completely absorbed from leaking from the opening around the leg of the absorbent article 10.

The paper diaper according to the present invention can be applied to diapers for infants and the elderly. Therefore, the present invention can be suitably used in the childcare and long-term care industries.

1 Cover sheet 2 1st sheet (back sheet)
3 Absorber 3a Front body absorber 3b Inseam absorber 3c Back body absorber 4 Second sheet 5 Side sheet 10 Absorbent article 20 Split position 21 Phase detection mark 22 Leg elastic elastic member 23 Waist elastic elastic member 24 Three-dimensional gather elastic elastic member 25 Three-dimensional gather part 26 Fasting tape 27 Front patch

Claims (8)

An absorbent article comprising a first sheet, a second sheet, and an absorber disposed between the first sheet and the second sheet.
The absorber is divided into a plurality of parts in the longitudinal direction of the absorbent article.
An absorbent article, wherein the first sheet is provided with at least one phase detection mark for alignment with the absorber at a position corresponding to a divided portion of the absorber. The absorbent article according to claim 1, wherein the absorber has a groove along the longitudinal direction. The absorbent article according to claim 1 or 2, wherein the absorber is divided into three parts, a front body absorber, an inseam absorber, and a back body absorber. The absorber is divided into three parts, a front body absorber, a crotch absorber, and a back body absorber. In the crotch absorber, the groove extends from one end to the other end in the longitudinal direction. The absorbent article according to claim 2 , wherein the absorbent article is formed over the same. The absorber is divided into three parts, a front body absorber, a crotch absorber, and a back body absorber, and the groove is formed in the front body absorber and the back body absorber. The absorbent article according to claim 2 , wherein the absorbent article is formed from one end facing the absorber to an intermediate portion thereof. The absorber is divided into three parts, a front body absorber, an inseam absorber, and a back body absorber, and one or a plurality of grooves are provided in each of the divided absorbers. The absorbent article according to claim 2. The absorbent article according to any one of claims 1 to 6, wherein the phase detection mark has a plurality of the phase detection marks in the width direction of the absorbent article. The absorbent article according to any one of claims 1 to 7, wherein the phase detection mark has a plurality of the phase detection marks in the longitudinal direction of the absorbent article.

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