JP4301633B2 - Laminated sheet and absorbent article - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laminated sheet containing activated carbon, and particularly relates to a laminated sheet applicable to various deodorization and water absorption applications that has sufficient strength, does not fall off activated carbon, and can be produced without contaminating products and production lines. The present invention also relates to an absorbent body and absorbent article having a deodorizing / water-absorbing function using the laminated sheet, and more particularly, to an absorbent body and absorbent article that do not flow out to the outside together with the liquid absorbed by activated carbon and contaminate the wearing equipment. .
[0002]
[Prior art and problems to be solved by the invention]
Various sheet-like materials utilizing the adsorption performance of activated carbon have been conventionally known. For example, JP-A-9-173429 describes an activated carbon-containing pulp sheet that can be applied to various deodorizing uses containing activated carbon fine particles, but has disadvantages such as low strength and the ability of activated carbon to easily fall off. is there. Moreover, when the liquid is absorbed, the activated carbon flows out together with the liquid and contaminates the vicinity, so that it cannot be applied to water absorption. In order to make up for these drawbacks, a laminated sheet obtained by laminating pulp sheets by sheeting or pasting is known, but there is a problem that activated carbon falls off during the slitting process and the product and the production line become dirty. is there.
[0003]
Accordingly, an object of the present invention is to provide a laminated sheet applicable to various deodorization and water absorption applications that has sufficient strength, does not drop off activated carbon, and can be produced without contaminating products and production lines, and Provided are an absorbent body and an absorbent article having a deodorizing / water-absorbing function using a laminated sheet, which do not flow out to the outside together with a liquid absorbed by activated carbon and contaminate a wearing tool and the like. There is.
[0004]
[Means for Solving the Problems]
The present invention is a laminated sheet in which an activated carbon-containing sheet is interposed between two pulp sheets, and the laminated sheet in which the activated carbon-containing sheet is not interposed over the entire at least one side portion of the laminated sheet. The object is achieved by providing.
[0005]
Further, the present invention is an absorbent body in which an absorbent material is wrapped so that one side portion and the other side portion of the laminated sheet overlap each other, and the activated carbon-containing sheet is interposed above the overlapping portion. The object is achieved by providing an absorber in which no one side is arranged.
[0006]
Further, according to the present invention, the absorbent body is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and the flexible side extends outward in the width direction of the absorbent body. The absorbent article is provided with a flap, and an elastic elastic member is provided in the crotch region of the side flap along the longitudinal direction, and both side edges in the longitudinal direction on the rear side of the absorbent article are folded back to the top sheet side. A first folded portion in which the absorber is present is formed, and a side flap in the first folded portion is folded back to the back sheet side to form a second folded portion, and the first folded portion is bonded and fixed to the top sheet. And the said objective is achieved by providing the absorbent article which joined and fixed the said 2nd folding | turning part to the said 1st folding | turning part.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferable one Embodiment of the lamination sheet of this invention is described, referring FIGS. 1-3 with the absorber using this lamination sheet.
First, the lamination sheet 1 of this embodiment is demonstrated. In addition, the lamination sheet 1 of this embodiment is used for the absorber of the disposable diaper mentioned later.
As shown in FIGS. 1 and 2, the laminated sheet 1 according to the present embodiment has a shorter length in the width direction between two rectangular pulp sheets 3 and 3 having the same size, as compared to the pulp sheet 3. A rectangular activated carbon-containing sheet 2 is interposed. And the side part 1a, 1a of the lamination sheet 1 does not interpose the activated carbon containing sheet | seat 2 over the whole side part 1a, respectively.
[0008]
When the laminated sheet 1 of this embodiment is explained in full detail, as shown in FIG. 2, the side parts 1a and 1a are the two pulp sheets 3 without interposing the activated carbon containing sheet 2 over the whole side part 1a, respectively. 3 is a two-layer structure part. By adhering the pulp sheets 3 and 3 in the side portions 1a and 1a to each other, both side ends of the laminated sheet 1 are sealed, and the falling of activated carbon from the side ends is prevented.
The length L in the width direction of the side portion 1a is preferably 0.1 to 20 cm, more preferably 1 to 6 cm. If it is less than 0.1 cm, it may not be possible to prevent the activated carbon from falling off, and if it is greater than 20 cm, the activated carbon-containing sheet 2 may become too small to fully exhibit the deodorizing function.
[0009]
The activated carbon-containing sheet 2 in the laminated sheet 1 of the present embodiment is an activated carbon mixed paper having a deodorizing function, and is sandwiched between two pulp sheets 3 and 3 at the center in the width direction. The activated carbon-containing sheet 2 and the pulp sheet 3 are laminated as described above by sheeting or bonding using an adhesive or the like.
[0010]
The length in the longitudinal direction of the activated carbon-containing sheet 2 is the same as the length in the longitudinal direction of the pulp sheet 3, but the length in the width direction is the side portion 1a when the activated carbon-containing sheet 2 is disposed at the predetermined position. 1a is shorter than the length in the width direction of the pulp sheet 3 so that the activated carbon-containing sheet 2 is not interposed over the entire side part 1a.
Although the thickness of the activated carbon containing sheet | seat 2 should just be adjusted suitably according to a use, Preferably it is 0.1-10 mm, More preferably, it is 0.2-0.5 mm.
[0011]
The pulp sheet 3 is a pulp sheet that does not contain activated carbon. By sandwiching the activated carbon-containing sheet 2 between the two pulp sheets 3, 3, the strength of the laminated sheet 1 is improved and the activated carbon is prevented from falling off. The
Although the thickness of the pulp sheet 3 should just be adjusted suitably according to a use, Preferably it is 0.1-10 mm, More preferably, it is 0.2-0.5 mm.
[0012]
Next, the absorber 10 of the present embodiment using the laminated sheet 1 will be described with reference to FIG. In addition, the absorber 10 of this embodiment is used as an absorber of the disposable diaper mentioned later.
As shown in FIG. 3, the absorbent body 10 of the present embodiment is formed by wrapping an absorbent material 11 having a vertically long rectangular shape so that one side 1 a and the other side 1 a of the laminated sheet 1 are overlapped. The one side part 1a and the other side part 1a are overlapped at the center of the absorbent material 11 in the width direction, and are bonded or fused by a known method. In the absorbent body 10, the absorbent material 11 is covered with the pulp sheet 3 except for the front end portion and the rear end portion thereof.
[0013]
Since one side part 1a and the other side part 1a in the absorbent body 10 of the present embodiment are not overlapped with the activated carbon-containing sheet 2, no matter which is placed on the upper side, the activated carbon is placed above the overlapping part. Although the content sheet 2 is not interposed, the configuration of the laminated sheet of the present invention is that the activated carbon-containing sheet 2 is not interposed only on one side and the activated carbon-containing sheet 2 on the other side. In the configuration in which is interposed, one side portion is arranged on the upper side of the other side portion and overlapped.
[0014]
The activated carbon-containing sheet 2 is mainly composed of activated carbon and fiber raw materials.
The activated carbon used in the activated carbon-containing sheet 2 of the present embodiment can be used without being limited to the raw material, the activation method, the shape, etc., as long as it is an activated carbon exhibiting high adsorptivity to bad odor or other gaseous substances. The granular activated carbon preferably has an average particle diameter of 0.1 to 50 μm and a specific surface area of 500 to 2000 m ² / g, more preferably an average particle diameter of 1 to 20 μm and a specific surface area of 1000 to 1500 m ² / g.
The activated carbon content in the activated carbon-containing sheet 2 is preferably 1 to 50%, more preferably 3 to 30%. If it is less than 1%, the deodorizing effect may not be achieved. If it is more than 50%, the content of the pulp raw material may be lowered, and the sheet strength and flexibility may be significantly reduced.
[0015]
As a fiber raw material of the activated carbon-containing sheet 2, known natural fibers such as non-wood pulp such as straw and cotton can be used in addition to wood pulp such as NBKP and LBKP. Further, for the purpose of improving the sheet strength, synthetic fibers such as polyethylene fibers may be appropriately mixed.
The content of the fiber raw material in the activated carbon-containing sheet 2 is preferably 50 to 99%, more preferably 70 to 97%. If it is less than 50%, the sheet strength and flexibility may be lowered. If it is more than 99%, the content of activated carbon may be lowered and the deodorizing effect may not be achieved.
[0016]
As the pulp sheet 3, paper, non-woven fabric or the like is used. In the case of paper, as the fiber material, the same material as the activated carbon-containing sheet 2 can be used. Moreover, when it is set as a nonwoven fabric, all well-known nonwoven fabrics, such as a spunlace nonwoven fabric and a spun bond nonwoven fabric, can be used, for example.
[0017]
As a constituent material of the absorbent 11, known fibrous or powdery polymer absorbers such as pulp, non-woven fabric, polyacrylate, and starch graft polymer used in conventional absorbent articles can be used.
[0018]
Although the manufacturing method in particular of the lamination sheet of this embodiment is not restrict | limited, Hereinafter, the preferable manufacturing method of the lamination sheet of this embodiment is demonstrated.
<Manufacturing method of laminated sheet of this embodiment>
The activated carbon-containing sheet 2 is obtained from a slurry containing activated carbon and a fiber raw material and formed into a sheet shape by a normal wet papermaking method as usual. In addition to various additives used in ordinary papermaking, various binders for fixing the activated carbon to the sheet are added to the slurry. As another method for producing the activated carbon-containing sheet 2, a method of forming a sheet from a fiber raw material containing an additive and impregnating the sheet with a dispersion of activated carbon mixed with a binder can also be employed.
Moreover, the pulp sheet 3 is obtained by forming into a sheet form from a slurry mainly composed of fiber raw material by the same means as the activated carbon-containing sheet 2.
[0019]
The activated carbon-containing sheet 2 and the pulp sheet 3 obtained as described above are combined with each other on a paper machine as usual, or bonded with an adhesive using a bonding machine, The laminated sheet has an activated carbon-containing sheet 2 interposed between two pulp sheets 3 and 3. Thereafter, the sheet width is adjusted to a desired sheet width in the slitting process to obtain the laminated sheet 1 of the present embodiment. At that time, the activated carbon is removed because the activated carbon-containing sheet 2 is not interposed between the side portions 1a and 1a. Therefore, the product and the production line are not soiled.
[0020]
In the laminated sheet 1 of the present embodiment, the activated carbon-containing sheet 2 is interposed between the two pulp sheets 3 and 3, and the side portions 1 a and 1 a have the activated carbon-containing sheet 2 interposed over the entire side portion 1 a. Therefore, it has a deodorizing function, has sufficient strength, does not fall off activated carbon, and can be manufactured without soiling the product and the production line.
[0021]
FIG. 4 is a perspective view of a disposable diaper that is a preferred embodiment of the absorbent article of the present invention using the absorbent body 10.
The disposable diaper 20 of the present embodiment is worn together with a wearing tool such as an underwear or a diaper cover, and the absorbent body 10 has a width between a liquid-permeable top sheet 21 and a liquid-impermeable back sheet 22. A flexible side flap 23 interposed in the center of the direction and extending outward in the width direction of the absorbent body 10 is provided, and a stretchable elastic member 24 is provided in the crotch region of the side flap 23 along the longitudinal direction. ing. And both the longitudinal direction both side edges of the back of the absorbent article 20 are each folded back to the top sheet 21 side, and the 1st folding | turning part 25 in which the absorber 10 is contained is formed, and the side flap 23 in the 1st folding | folding part 25 is formed. The second folded portion 26 is formed by folding back to the back sheet 22 side. Furthermore, the first folded portion 25 is joined and fixed to the top sheet 21, and the second folded portion 26 is joined and fixed to the first folded portion 25. .
In addition, the absorber 10 is arrange | positioned so that the center part of the longitudinal direction may contact the crotch area | region of the disposable diaper 20, This center part functions as absorbers, such as a bodily fluid substantially. Moreover, although not shown in figure, in the center of the width direction of the back seat | sheet 22, the vertically long rectangular-shaped adhesion area | region for fixing the disposable diaper 20 to a wearing tool is provided, and it protects with the peeling sheet before use.
[0022]
The disposable diaper 20 is used as a disposable diaper for infants, adults or incontinence as usual, thereby absorbing and holding excrement such as body fluid in the crotch region, and by the deodorizing effect of activated carbon, The smell of excrement is removed. Further, excreted body fluid and the like are absorbed by the central portion of the absorbent body 10 in the longitudinal direction. As described above, the absorbent body 10 is covered with the pulp sheet 3 except for the front end portion and the rear end portion thereof. Therefore, the activated carbon does not flow out of the absorbent body 10 together with the absorbed body fluid and the like, and the body and the wearing tool are not soiled.
In addition, although the front-end part and rear-end part of the absorber 10 in the absorbent article 20 of this embodiment are not each covered with the pulp sheet 3, the absorbed body fluid etc. remain in the center part of the longitudinal direction, Since it does not penetrate to the rear end, the activated carbon does not flow out together with the body fluid or the like from here.
[0023]
The laminated sheet of the present invention and the absorbent body and absorbent article using the laminated sheet are not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
The laminated sheet of the present invention may be such that at least one side part is entirely free of the activated carbon-containing sheet, and the peripheral part including the one side part is entirely free of the activated carbon-containing sheet. Also good. Moreover, the activated carbon containing sheet | seat does not need to interpose all the parts cut | disconnected at the time of manufacture over each part.
Further, the shape and size of the absorbent body of the present invention can be appropriately changed depending on the application.
In addition, the absorbent article of the present invention is not limited to the disposable diaper of the above-described embodiment, and may be an absorbent article for sanitary use, treatment for octopus, and the like.
[0024]
【The invention's effect】
According to the laminated sheet of the present invention, it can be applied to various deodorization and water absorption applications, has sufficient strength, does not fall off activated carbon, and can be manufactured without contaminating products and production lines. Moreover, according to the absorbent body and absorbent article of the present invention using the laminated sheet, it has a deodorizing / water-absorbing function, and does not flow out to the outside together with the liquid absorbed by the activated carbon to contaminate the wearing tool or the like.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a laminated sheet according to the present embodiment.
FIG. 2 is a cross-sectional view of the laminated sheet of the present embodiment.
FIG. 3 is a perspective view showing a part of the main part of the absorbent body according to the present embodiment.
FIG. 4 is a perspective view of the absorbent article of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Laminated sheet 1a Laminated sheet side part 2 Activated carbon containing sheet 3 Pulp sheet 10 Absorber 11 Absorbent material 20 Absorbent article 21 Top sheet 22 Back sheet 23 Side flap 24 Elastic member 25 First folded part 26 Second folded part

Claims (3)

In the laminated sheet is interposed activated carbon-containing sheet between the pulp sheets 2 sheets, said one side portion and another laminated sheet in which the activated carbon-containing sheet over the whole of at least one side of the laminated sheet is not interposed An absorbent body that wraps the absorbent material so as to overlap the side part,
The absorber by which the one side part in which the said activated carbon containing sheet | seat is not interposed is arrange | positioned above the overlapping part. An absorbent article comprising the absorbent body according to claim 1 interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet. The absorber of claim 1, is interposed between the liquid pervious topsheet, a liquid-impermeable back sheet, further, the flexibility of the side that extends outward in the width direction of the absorber While providing a flap, an absorbent article provided with a stretchable elastic member along the longitudinal direction in the crotch region of the side flap,
The longitudinal both side edges of the back of the absorbent article are folded back to the top sheet side to form a first folded part in which the absorbent body is present, and the side flaps in the first folded part are folded to the back sheet side. Forming a second folded portion and fixing the first folded portion to the top sheet;
An absorbent article in which the second folded portion is bonded and fixed to the first folded portion.

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