JP2011205970A - Absorbent sheet for pet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent sheet for a pet, which can improve liquid diffusivity by an emboss-processing without changing the material of the absorber material.SOLUTION: This absorbing sheet 1 for the pet includes a liquid-penetrable front surface sheet 11, an unpenetrable back side sheet 13, and an absorber placed between the front surface sheet 11 and the back side sheet 13 and also includes embossed portions 20 having radiation-like dents 21, ... radially formed from the central portion to the edge portion on the absorber 14.

Description

  The present invention relates to an absorbent sheet for pets.

Conventionally, absorptive sheets for pets for absorbing urine etc. excreted by pets such as dogs and cats have become widespread.
As such a pet absorbent sheet, a configuration including a liquid-permeable top sheet, a liquid-impervious back sheet, and an absorbent body interposed between the top sheet and the back sheet is known. (For example, see Patent Document 1).

By the way, the pet absorbent sheet absorbs urination several times in normal use. In conventional PET absorbent sheets, the density of the absorbent is almost uniform, so if urination is concentrated in one place, the amount of absorption at that place may exceed the allowable amount, and urine may remain on the surface. It was. In this state, there is a problem that urine adheres to the pet's foot and the room gets dirty when walking in the room.
Therefore, for example, the absorber is made up of two layers, an upper layer and a lower layer, and the absorption rate of the lower layer is increased compared to the upper layer, or a diffusive sheet is arranged between the upper layer and the lower layer, thereby improving the diffusibility of urine. An absorbent sheet for pets is known (for example, see Patent Document 2).

JP 2001-352852 A JP 2009-232684 A

However, the absorbent sheet for pets of Patent Document 2 has a problem that the constituent material of the absorbent body is increased, leading to an increase in manufacturing cost.
On the other hand, in absorbent articles for human bodies such as napkins and disposable paper diapers, it is well known to emboss an absorbent body in order to control liquid diffusibility.
Specifically, for example, a lattice-shaped embossing is known, but in this case, the absorber is isolated for each area surrounded by the lattice, and the absorption capacity of the entire absorber is increased. It cannot be used effectively.

In addition, the absorbent article for human body is used by being mounted on the human body, and is mainly embossed to improve the fit. Therefore, for example, the entire absorbent body is embossed. Since the rigidity of the absorbent body is increased and the fitting property is impaired, it is not preferable.
Moreover, although the embossing is given also to the absorptive sheet for pets of patent document 1, it is not aimed at diffusion of urine or the like.
Therefore, the form of the conventional embossing given to an absorber was not in the shape which solves the problem of liquid diffusibility of an absorptive sheet for pets.

  The subject of this invention is providing the absorbent sheet for pets which can improve liquid diffusibility by embossing, without changing the material of an absorber.

  In order to solve the above problems, the invention according to claim 1 is a liquid-permeable top sheet, a liquid-impervious back sheet, and an absorber interposed between the top sheet and the back sheet. In the pet absorbent sheet having the above, the absorbent body is provided with an embossed part having a plurality of radial recesses formed radially from the central region to the edge.

According to the first aspect of the present invention, the liquid such as urine excreted by the pet diffuses toward the edge of the absorbent sheet for the pet through the radial recesses of the embossed portion, and the absorber Can be used effectively.
In addition, since there is an embossed part on almost the entire surface of the absorbent body, the absorbent body will be stiff, but the absorbent sheet for pets is not intended for human wear, so it may leak due to loss of fit There is a positive effect that the pet is not easily wrinkled even if the pet rides on the pet absorbent sheet.

  According to a second aspect of the present invention, in the pet absorbent sheet according to the first aspect, the embossed portion is provided on substantially the entire surface of the topsheet and the absorber.

  According to the invention described in claim 2, it is of course possible to have the same effect as that of the invention described in claim 1, and in particular, since it is provided on substantially the entire surface of the topsheet and the absorber, only the absorber is provided. Compared with what provided the embossing part, liquid, such as urine, can diffuse also from a surface sheet via a radial recessed part, and can further promote spreading | diffusion.

  Invention of Claim 3 is the absorbent sheet for pets of Claim 1 or 2, The said embossing part is equipped with the branch recessed part formed by branching from the middle of the said radial recessed part, It is characterized by the above-mentioned. .

  According to the invention described in claim 3, it is needless to say that the same effect as that of the invention described in claim 1 or 2 can be obtained. In particular, liquid such as urine is further diffused over the entire surface of the absorber due to the branch recess. As a result, the absorber can be used more effectively.

  Invention of Claim 4 is provided with the connection recessed part which the said branch recessed part branched from the adjacent said radial recessed part connected in the absorbent sheet for pets of Claim 3.

  According to the invention described in claim 4, it is of course possible to obtain the same effect as that of the invention described in claim 3. In particular, when there is urination in the peripheral portion other than the central portion due to the connecting concave portion, Liquid diffusion is performed not only in the direction but also in the peripheral parts, and the absorber can be used more effectively.

According to the present invention, the liquid such as urine excreted by the pet diffuses toward the edge of the pet absorbent sheet through the radial recesses of the embossed portion, so that the absorbent body of the entire sheet is It can be used effectively.
In addition, since there is an embossed part on almost the entire surface of the absorbent body, the absorbent body is stiff, but the absorbent sheet for pets is not intended for human wear, so there is no adverse effect on leakage, etc. Even if a pet rides on an absorbent sheet for pets, there is a positive effect that it is difficult to become wrinkles.

It is a top view which shows an example of the absorbent sheet for pets of 1st Embodiment. It is sectional drawing of the II-II part of the absorbent sheet of FIG. It is a top view which shows an example of the absorbent sheet for pets of 2nd Embodiment. It is sectional drawing of the IV-IV part of FIG. It is a top view which shows the modification 1 of an embossing part. It is a top view which shows the modification 2 of an embossing part.

Hereinafter, the pet absorbent sheet according to the embodiment of the present invention will be described in detail with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.
In the following description, the longitudinal direction of the pet absorbent sheet is the X direction, and the direction (width direction) orthogonal to the X direction is the Y direction. Moreover, let the thickness direction of the absorbent sheet for pets be a Z direction.

(First embodiment)
The pet absorbent sheet according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
For example, as shown in FIG. 1, the pet absorbent sheet 1 has a rectangular shape in plan view. For example, the pet absorbent sheet 1 is used on a floor surface of a pet toilet (not shown). The water of excreta excreted by can be absorbed into the sheet.

Specifically, as shown in FIG. 2, the pet absorbent sheet 1 includes a liquid-permeable surface sheet 11 that quickly transmits liquid such as urine, and a liquid-permeable material that is disposed on the back surface side of the surface sheet 11. The second sheet 12, the liquid-impermeable back sheet 13 disposed on the back side of the second sheet 12, and the absorber 14 interposed between the second sheet 12 and the back sheet 13. Has been.
Moreover, the embossing part 20 which has the radial recessed part 21 ... radially formed in the edge part from the center area | region is provided in the substantially whole area of the absorbent sheet 1 for pets.

The top sheet 11 is formed of a perforated or non-porous nonwoven fabric, a porous plastic sheet, or the like. As the raw material fibers constituting the nonwoven fabric, synthetic fibers such as polyethylene or polypropylene such as olefin, polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used. In addition, as a method for producing the nonwoven fabric, a known method can be appropriately used. For example, the nonwoven fabric is obtained by a spunlace method, a spunbond method, a thermal bond method, a melt blow method, a needle punch method, or a combination of these methods. Can be manufactured.
When a large number of through holes are formed in the top sheet 11, liquid such as urine is absorbed more quickly, and the dry touch property is excellent.

The second sheet 12 has a higher degree of hydrophilicity so that the liquid permeation rate is faster than that of the top sheet 11 in order to quickly transfer the liquid that has passed through the top sheet 11 to the absorber 14. This second sheet 12 not only rapidly transfers the liquid to the absorber 14 and enhances the absorption performance by the absorber 14, but also prevents the “return” phenomenon of the absorbed liquid from the absorber 14. It can be in a dry state.
Note that the second sheet 12 may be omitted.

Examples of the second sheet 12 include the same material as the top sheet 11, spunlace, spunbond, SMS, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber for the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. In order to make the nonwoven fabric bulky, it is also preferable to use an eccentric fiber, a hollow fiber, or an eccentric and hollow fiber that does not have a core at the center as the mixed fiber of all or part of the raw fiber.
Further, the second sheet 12 is treated with a hydrophilizing agent (surfactant) so as to have a higher degree of hydrophilicity than the top sheet 3.

  Examples of the method for applying the hydrophilizing agent include spray coating, gravure printing and flexographic printing, and curtain coating using various coaters. The hydrophilicity can be adjusted by adjusting the coating amount of the hydrophilizing agent.

The back sheet 13 covers the bottom surface of the absorber 14, further covers the end surface of the absorber 14, and is folded back to the top sheet 11 side at both side edges of the top surface of the absorber 14. The folded portion of the back sheet 13 and the top sheet 11 are bonded by a hot melt adhesive, heat seal, ultrasonic seal or the like.
The back sheet 13 is not particularly limited as long as it is a liquid-impermeable material. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, or a plastic film is provided on the surface of the nonwoven fabric. Examples thereof include a laminated nonwoven fabric and a laminated sheet obtained by laminating a nonwoven fabric on a plastic film. In addition, non-woven fabric using micro-denier fiber, enhanced leakage prevention by reducing fiber voids by applying heat or pressure, coating with superabsorbent resin or hydrophobic resin or water repellent Thus, a sheet that is liquid-impermeable without using a plastic film can also be used as the back sheet 13.

The absorber 14 absorbs water-like components such as urine, and can be formed of, for example, a fiber assembly. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. Further, the absorbent body 14 can also be configured by combining a superabsorbent polymer (SAP) with the fiber assembly.
Examples of the superabsorbent resin include carboxymethylcellulose, polyacrylic acid and salts thereof, acrylate polymer cross-linked product, starch-acrylic acid graft copolymer, starch-acrylonitrile graft copolymer hydrolyzate, polyoxyethylene cross-linked product Products, crosslinked products of carboxymethyl cellulose, polyethylene oxide, polyacrylamide and other partially crosslinked polymers, or a copolymer of isobutylene and maleic acid are preferably used.
Furthermore, in order to give a deodorant function, you may put a deodorizer in the absorber 14. FIG. As the deodorant, for example, activated carbon, natural minerals (for example, bennite, kaolinite, kanemite, etc.), synthetic inorganic substances (zeolite, amorphous silica, etc.) can be used.

Next, the embossing part 20 will be described.
The embossed portion 20 has a plurality of radial recesses 21... That are radially formed from the central region to the edge of the pet absorbent sheet 1. Each radial recess 21 is a linear groove and is provided at a predetermined interval.
The embossing part 20 presses the embossing roll processed into a predetermined shape from the upper surface side of the surface sheet 11 in a state where the surface sheet 11, the second sheet 12, and the absorber 14 are laminated in the Z direction from the surface sheet 11 side. It is formed by embossing. As the embossing, heat embossing using a heated embossing roll is preferable from the viewpoint of the adhesiveness of the topsheet 11, the second sheet 12, and the absorber 14.
In this case, in addition to forming a concave portion by embossing on both the top sheet 11 and the second sheet 12, a radiation concave portion 21 by embossing so as to reach a part or almost the entire thickness of the absorber 14 from the surface side of the top sheet 11. Is formed.
Moreover, for example, the top sheet 11 may be prevented from being broken or the liquid diffusion rate may be adjusted by alternately applying high pressure and low pressure embossing.

  The radial recesses 21 have the effect of inducing and diffusing the liquid in the extending direction. Therefore, when the radial recesses 21 are made to be substantially linear, the liquid diffuses through the radial recesses 21 on the surface side layer before reaching the absorber 14, and the absorber. 14 broader parts will be available for absorption. Therefore, even when urine is concentrated in one place. Leakage due to insufficient absorption capacity is less likely to occur. In particular, in the present embodiment, since the radial recesses 21... Are provided radially from the central region toward the edge, urine excreted by the pet can be quickly diffused from the center to the edge.

According to the pet absorbent sheet 1 of the first embodiment described above, the liquid such as urine excreted by the pet passes through the radial recesses 21 of the embossed part 20. It becomes diffused toward an edge part, and the absorber 14 of the whole sheet | seat can be used effectively.
In particular, since the embossed part 20 is provided on substantially the entire surface of the topsheet 11 and the absorbent body 14, liquid such as urine is more liquid than the topsheet 11 provided with the embossed part only. Can be diffused through the radial recesses 21..., And the diffusion can be further promoted.

Moreover, since the rigidity can be increased by forming a concave portion by embossing in the absorbent body 14, the absorbent body 1 for pets is intended for wearing on the human body, although the absorbent body 14 is stiff due to the radial concave portions 21. Since it is not a thing, it does not have a bad influence on the leak etc. by impairing a fitting property, but there exists a plus effect that it is hard to become a wrinkle even if a pet rides on the pet absorbent sheet 1 rather.
Further, since the second sheet 12 is set to have a higher hydrophilicity than the top sheet 11, after the urine diffuses along the radial recesses 21..., Many of the second sheets are disposed on the lower layer side and have high water permeability. By passing through the sheet 12 and reaching the absorber 14, a feeling of lightness is generated, and even when pressure is applied after that, reversal is prevented. Therefore, it is easy to maintain a light feeling.

(Second Embodiment)
Next, the pet absorbent sheet 2 of the second embodiment will be described based on FIGS. 3 and 4.
In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIGS. 3 and 4, the pet absorbent sheet 2 of the second embodiment is formed only on the absorbent body 14 without the embossed portion 30 being formed on the top sheet 11 and the second sheet 12. It differs from the pet absorbent sheet 1 of the first embodiment.
According to the pet absorbent sheet 2 of the second embodiment, the urine excreted by the pet passes through the top sheet 11 and the second sheet 12, and then the radial recess 31 · of the embossed part 30 provided in the absorber 14.・ ・ Will diffuse from the central area to the edge.
Therefore, the liquid such as urine excreted by the pet passes through the top sheet 11 and the second sheet 12 and is quickly absorbed by the absorbent body 14. At the same time, the liquid absorbed by the absorbent body 14 Even if it receives, it will be prevented from returning.

According to the pet absorbent sheet 2 of the second embodiment described above, in addition to obtaining the same effect as the pet absorbent sheet 1 of the first embodiment, it is difficult to see the embossed portion 30 from the outside. Because of the structure, it looks better than the pet absorbent sheet 1 of the first embodiment.
Moreover, in the case of heat embossing, in the pet absorbent sheet 1 of the first embodiment, the liquid permeability of the surface sheet 11 may be deteriorated by heat, but the pet absorbent sheet of the present embodiment. In No. 2, since the surface sheet 11 is not embossed, there is no deterioration in liquid permeability.

(Modification 1 of embossed part)
Next, FIG. 5 shows a second modified example of the embossed portions 20 and 30 in the pet absorbent sheets 1 and 2 according to the first and second embodiments.
In the description of Modification 1, the same components as those in the first embodiment or the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.
The embossing part 40 in FIG. 5 includes branch recesses 22... Formed by branching from the middle of the radial recesses 21.
A plurality of branch recesses 22 are provided for one radial recess 21 like a tree branch, for example.
The width of the branch recesses 22 is smaller than, for example, the radial recesses 21. Further, the depth of the branch recesses 22... Can be deeper than the radial recesses 21. By doing so, the diffusion from the central area to the edge by the radial recesses 21.

  According to the pet absorbent sheet 3 having the embossed portion 40 of the first modification, liquid such as urine can be further diffused over the entire surface of the absorbent body 14 by the branch recesses 22. Thus, the absorber 14 can be effectively used.

(Modification 2 of embossed part)
Next, FIG. 6 shows a second modification of the embossed portions 20 and 30 in the pet absorbent sheets 1 and 2 according to the first and second embodiments.
In the description of Modification 2, the same reference numerals are given to the same configurations as those in the first embodiment or the second embodiment, and the description thereof is omitted.
The embossing part 50 in FIG. 6 is provided with the connection recessed part 23 ... which connects the radial recessed parts 21 further in addition to the radial recessed part 21 ....
The connection recessed part 23 can be comprised as what the branched recessed parts 22 branched from the adjacent radial recessed part 21 connected in the said modification 1. FIG.
Moreover, the connection recessed part 23 is provided alternately, for example like an Amida lottery, so that the connection recessed parts 23 ... may connect two or more, and a closed area may not be formed.

  According to the pet absorbent sheet 4 having the embossed portion 50 of the second modified example, when there is urination in the peripheral portion other than the central portion due to the connecting concave portion 23. Liquid diffusion is performed between them, and the absorber can be used more effectively.

In addition, this invention is not limited to the said 1st, 2nd embodiment and the modifications 1 and 2, Of course, it can change suitably about a specific structure.
For example, both the front sheet 11 and the back sheet 13 may be extended from the absorber 14, and the extended top sheet 11 and back sheet 13 may be fixed with an adhesive such as hot melt.

1 Absorbent sheet for pets (first embodiment)
2 PET absorbent sheet (first embodiment)
3 PET absorbent sheet (Modification 1)
4 Absorbent sheet for pets (Modification 2)
DESCRIPTION OF SYMBOLS 11 Top sheet 12 Second sheet 13 Back sheet 14 Absorber 20 Embossing part 21 Radial recessed part 22 Branch recessed part 23 Connection recessed part 31 Radial recessed part 30 Embossed part 40 Embossed part 50 Embossed part

Claims (4)

In an absorbent sheet for pets having a liquid-permeable surface sheet, a liquid-impermeable back sheet, and an absorbent body interposed between the surface sheet and the back sheet,
The absorbent sheet for pets, characterized in that the absorbent body has an embossed portion having radial recesses formed radially from the center to the edge.   The absorbent sheet for pets according to claim 1, wherein the embossed portion is provided on substantially the entire surface of the top sheet and the absorbent body.   The absorbent sheet for pets according to claim 1 or 2, wherein the embossed part includes a branched recess formed by branching from the middle of the radial recess.   The absorptive sheet for pets according to claim 3 provided with the connection crevice which said branching crevice branched from said adjacent radial crevice connected.

Images