JP5946595B1 - Animal excrement disposal sheet - Google Patents

Abstract

An object of the present invention is to provide an animal excrement disposal sheet capable of exhibiting a sufficiently excellent concealing property with only a surface sheet without being restricted by the constitution. An animal excrement disposal sheet (1) according to the present invention comprises a liquid-permeable top sheet (2) composed of white fibers, a liquid-impermeable back sheet (4), and these An absorbent body (3) disposed between the sheets, wherein the top sheet (2) is a first surface that is a waste supply surface and a first surface that is opposite to the first surface. And the top sheet (2) has an average absorbance of the first surface of 700 or more, a floc average value of the first surface of 6.0 or less, and the first sheet The floc ratio of one surface is 0.6 to 1.7. [Selection] Figure 1

Description

  The present invention relates to an animal excrement disposal sheet used when raising an animal such as a dog.

  As an animal excrement disposal sheet for treating excrement excreted by pets such as dogs, a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber positioned between these sheets are provided. Animal excrement disposal sheets are known.

And the animal excrement disposal sheet | seat which has favorable concealment property with respect to the excretion excreted from the pet is also known inside. As an animal excrement disposal sheet having such a good concealing property, for example, Patent Document 1 discloses a liquid-permeable top sheet, a liquid-impermeable back sheet, and a sheet located between these sheets. An absorbent sheet for pets having an absorbent body and the intermediate sheet disposed between the top sheet and the absorbent body, which is visible from the excretion surface side, and the other absorbent sheet for pets The pet absorbent sheet has a color arrangement area that forms a color arrangement pattern together with the area, and the top sheet is formed to have a lower total light transmittance than the intermediate sheet.
The absorptive sheet for pets disclosed in Patent Document 1 can conceal excrement held in the intermediate sheet and the absorbent body by having the above-described color arrangement region, and further, a top sheet When the total light transmittance is lower than that of the intermediate sheet, the excrement held on the intermediate sheet and the absorber is difficult to see from the top sheet.

JP 2014-117177 A

However, in the absorbent sheet for pets disclosed in Patent Document 1, in order to obtain good concealing properties, at least the above-described color arrangement region is provided, and the top sheet and the intermediate sheet have specific total light rays. There are restrictions on the product configuration, such as the need to satisfy the transmittance relationship, and depending on the coloration pattern of the coloration area, it may not match the color of excrement, and excrement held on the intermediate sheet or absorber There was a possibility that it could not be sufficiently concealed.
Furthermore, like the pet absorbent sheet disclosed in Patent Document 1, just because the total light transmittance of the top sheet is lower than that of the intermediate sheet, the color of the excrement held on the intermediate sheet or the absorber is reduced. Even if it becomes relatively thin, if there is structural unevenness such as fiber density in the surface direction of the top sheet (that is, if there is uneven light transmission), it is excreted in the intermediate sheet or absorber. The boundary between the part in which the object is held and the part in which the excrement is not held is easily recognized, and there is a possibility that the excrement held in the intermediate sheet or the absorber cannot be sufficiently concealed.

  Then, this invention aims at providing the excrement disposal sheet | seat for animals which can exhibit the concealment property excellent enough only by the surface sheet, without receiving the restrictions on a structure.

  One aspect (aspect 1) of the present invention includes a liquid-permeable top sheet composed of white fibers, a liquid-impermeable back sheet, and an absorbent body disposed between these sheets. The animal excrement disposal sheet has a first surface that is a supply surface of excrement, and a second surface that is a surface opposite to the first surface, The surface sheet has an average absorbance of the first surface of 700 or more, an average floc value of the first surface of 6.0 or less, and a floc ratio of the first surface of 0.6 to 1. .7.

The animal excrement disposal sheet according to aspect 1 has an average absorbance of 700 or more on the first surface of the top sheet and a high whiteness level (that is, white is dark). The color of excrement such as urine absorbed and retained in the body is less visible from the surface sheet side. Furthermore, in the animal excrement disposal sheet of this aspect 1, the floc average value on the first surface of the top sheet is 6.0 or less, and the floc ratio on the first surface is 0.6 to 1.7. Therefore, the white color unevenness on the first surface of the top sheet is small (that is, the first surface is uniformly white), and in the absorber, the portion where the excrement is held and the excrement are held. The boundary with the part which is not visible becomes difficult to be visually recognized from the surface sheet side.
Therefore, in the animal excrement disposal sheet according to the first aspect, the color of the excrement held by the absorber is difficult to be visually recognized, and the outline of the portion holding the excrement in the absorber is hardly visible. Therefore, it is possible to exhibit a sufficiently excellent concealing property only by providing a surface sheet that satisfies the above specific requirements.

  In another aspect (Aspect 2) of the present invention, in the animal excrement disposal sheet according to Aspect 1, the average absorbance of the first surface of the top sheet is 2000 or less.

  In the animal excrement disposal sheet of this aspect 2, the average absorbance of the first surface of the surface sheet is 2000 or less, and excrement retained in the absorber is not completely concealed. ) Can confirm the presence or absence of excretion of the animal, although it is difficult to see, and can recognize the replacement time of the excrement disposal sheet.

  Furthermore, in another aspect (aspect 3) of the present invention, in the animal excrement disposal sheet according to aspect 1 or 2, the top sheet has an uneven structure on the first surface and is flat on the second surface. It has a structure.

In the animal excrement disposal sheet of this aspect 3, the first surface of the surface sheet serving as the excrement supply surface has an uneven structure, and is located on the absorber side of the surface sheet in the convex and concave portions of the uneven structure. Since the visibility of the member (for example, an absorber etc.) to perform differs, the outline of the part holding the excrement in the absorber further becomes difficult to visually recognize. Furthermore, since the second surface of the topsheet facing the absorber has a flat structure, it is difficult to form a gap between the second surface of the topsheet and the absorber. Animal excrement supplied on the first surface of the top sheet is easily drawn to the absorber side by capillary action, and liquid residue of the excrement on the top sheet can be prevented.
Therefore, in the animal excrement disposal sheet according to the third aspect, the trace of excrement on the top sheet is difficult to be visually recognized.

  Furthermore, in another aspect (aspect 4) of the present invention, in the animal excrement disposal sheet according to any one of aspects 1 to 3, the white fiber contains titanium oxide, and the titanium oxide is contained in the fiber. The amount is 1 to 3% by mass.

  In the animal excrement disposal sheet of this aspect 4, the white fibers contain a predetermined amount of titanium oxide having a particularly high refractive index among the white pigments, and each range of the absorbance and the flock ratio of the first surface described above is set. Since the filling surface sheet can be obtained easily and reliably, the above-described excellent concealing property can be more stably and reliably exhibited.

  Furthermore, in another aspect (aspect 5) of the present invention, in the animal excrement disposal sheet according to aspect 4, the white fiber is made of a core-sheath type thermoplastic resin fiber, and the titanium oxide is the core-sheath type. It is contained only in the core of the thermoplastic resin fiber.

In the animal excrement disposal sheet of this aspect 5, since the above-mentioned titanium oxide is contained only in the core portion of the core-sheath type thermoplastic resin fiber constituting the white fiber, the light incident on the fiber is transmitted. When reflected by the titanium oxide contained in the core, the reflected light is refracted at the sheath covering the outer surface of the core and emitted from the fiber, resulting in more diffuse reflection of light. it can.
Therefore, the animal excrement disposal sheet according to the fifth aspect can exhibit further excellent concealment in the top sheet.
Further, when the surface sheet is constituted by such a specific core-sheath type thermoplastic resin fiber (that is, a core-sheath type thermoplastic resin fiber containing titanium oxide only in the core part), When manufacturing the surface sheet, the fibers are less likely to be obstructed by titanium oxide due to heat-sealing of the sheath portion, so that the fibers can be bonded more reliably, and the surface sheet has excellent strength. Can be. As a result, the core sheet of the core-sheath type thermoplastic resin fiber constituting the surface sheet is less affected by the animal's scratching operation, etc. It can be exhibited more continuously over a long period.

  Furthermore, in another aspect (Aspect 6) of the present invention, in the animal excrement disposal sheet according to any one of Aspects 1 to 5, the thickness of the surface sheet is 0.5 mm or more.

  In the animal excrement disposal sheet of this aspect 6, the thickness of the surface sheet is 0.5 mm or more, and the first surface of the surface sheet (that is, the supply surface of excrement) and the absorbent body holding the excrement are constant. Since they are separated to a certain extent, the excrement held by the absorber is further less visible.

Furthermore, in another aspect (Aspect 7) of the present invention, in the animal excrement disposal sheet according to any one of Aspects 1 to 6, the basis weight of the top sheet is 20 g / m ² or more.

In the animal excrement disposal sheet of this aspect 7, the basis weight of the surface sheet is 20 g / m ² or more, and the distance between fibers of the fibers constituting the surface sheet is within a predetermined range, so that the excrement is retained. The absorber becomes more difficult to be visually recognized due to the denseness of the fibers, and the capillarity in which excrement is transferred from the first surface to the second surface can be more effectively expressed in the surface sheet. Thereby, the excrement disposal sheet for animals of this embodiment 7 can exhibit further excellent concealment performance and high absorption performance (absorption rate).

  Furthermore, in another aspect (aspect 8) of the present invention, in the animal excrement disposal sheet according to any one of aspects 1 to 7, the absorbent body has an absorbent core containing an absorbent material. A colored sheet having a colored region at least partially is disposed between the top sheet and the absorbent core.

  Since the animal excrement disposal sheet of this aspect 8 includes the above-described colored sheet between the top sheet and the absorption core, the excrement held in the absorption core of the absorber is covered by the top sheet. In addition to the action, it becomes inconspicuous due to colors and patterns in the colored region of the colored sheet, and the excrement held in the absorbent body (particularly the absorbent core) becomes more difficult to visually recognize.

  ADVANTAGE OF THE INVENTION According to this invention, the animal excrement disposal sheet | seat which can exhibit the concealment property excellent enough only by the surface sheet, without receiving the restrictions on a structure can be provided.

FIG. 1 is a perspective view of an animal excrement disposal sheet according to an embodiment of the present invention. 2 is a cross-sectional view of the animal excrement disposal sheet according to one embodiment of the present invention, taken along line II-II in FIG. Fig. 3 (a) is a plan view schematically showing a state after the animal excrement disposal sheet according to one embodiment of the present invention absorbs urine, and Fig. 3 (b) is a diagram for a conventional animal. It is a top view which shows typically the state after an excrement disposal sheet | seat absorbs urine. Fig.4 (a) is the top view which looked at the excrement disposal sheet | seat for animals which concerns on another embodiment of this invention from the surface sheet side, FIG.4 (b) is the excretion for animals of Fig.4 (a). It is a top view which shows typically the state after a material treatment sheet | seat absorbs urine.

  Hereinafter, preferred embodiments of the animal excrement disposal sheet of the present invention will be described in detail with reference to the drawings. In the present specification, unless otherwise specified, “objects placed on a horizontal surface so that the supply surface of the excrement faces upward in an expanded state (for example, animal excrement disposal sheet, surface sheet) , “Viewing the absorber, etc. in the thickness direction of the object from the upper side in the vertical direction” is simply referred to as “plan view”, and the view in plan view is referred to as “plan view”.

FIG. 1 is a perspective view of an animal excrement disposal sheet 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the animal excrement disposal sheet 1 taken along line II-II in FIG. is there.
As shown in FIG. 1, the animal excrement disposal sheet 1 according to an embodiment of the present invention is a rectangular sheet having a longitudinal direction L, a width direction W, and a thickness direction T in plan view. In the present invention, the external shape of the animal excrement disposal sheet is not limited to such a rectangular shape, and may be any shape such as a square, a polygon, a circle, an ellipse, etc., depending on various uses and design properties. Shape can be adopted. In addition, the size of the animal excrement disposal sheet 1 can be appropriately set according to the size and type of the animal to which the excrement disposal sheet is applied. The length in the direction L is about 400 mm to 1200 mm, and the length in the width direction W is about 250 mm to 800 mm.

  As shown in FIG. 1, the animal excrement disposal sheet 1 is placed in a predetermined position in a breeding space (for example, indoors) of an animal such as a pet in an unfolded state, and urine excreted from the animal It is used to absorb and retain excrement and keep the breeding space clean. The animal excrement disposal sheet 1 may be placed directly on the floor or ground of the breeding space, or may be placed via a predetermined holder, tray, laying material, or the like.

  Here, the “animal” to which the animal excrement disposal sheet of the present invention is applied is not particularly limited as long as it is an animal that can be reared as a pet or the like. In addition to mammals such as dogs, cats, and hamsters, for example, birds And various animals such as reptiles and amphibians.

  Further, in the present invention, the “excrement” absorbed and retained by the animal excrement disposal sheet is not particularly limited as long as it can be absorbed and retained by the absorber described later. Various body fluids such as saliva such as feces, urine, and drooling, and blood can be mentioned.

  As shown in FIGS. 1 and 2, the animal excrement disposal sheet 1 according to the present embodiment is a liquid-permeable surface sheet 2 that forms a supply surface of excretion excreted from animals in the thickness direction T. And the surface opposite to the excrement supply surface and facing the placement surface of the animal excrement disposal sheet 1 (that is, the floor or the ground on which the animal excrement disposal sheet is placed). A liquid-impermeable back sheet 4 that forms a surface), and a liquid-absorbing absorber 3 disposed between these sheets, and the top sheet 2 and the back sheet 4 are respectively Are joined to each other by any joining means such as a hot-melt adhesive.

  And in this embodiment, the surface sheet 2 is comprised by the white fiber, The 1st surface used as the supply surface of the excretion excreted from the animal, and the surface on the opposite side to this 1st surface, The first surface has an average absorbance of 700 or more, the first surface has a floc average value of 6.0 or less, and the first surface has a second surface facing the absorber 3. The floc ratio is 0.6 to 1.7 (hereinafter, the requirements relating to the average absorbance, the floc average value, and the floc ratio may be simply referred to as “specific requirements”).

Here, Fig.3 (a) is a top view which shows typically the state after the excrement disposal sheet | seat 1 for animals which concerns on this embodiment absorbed urine as excrement, FIG.3 (b) It is a top view which shows typically the state after the conventional animal excrement disposal sheet | seat 100 (namely, the thing using the surface sheet 200 which does not satisfy | fill the above-mentioned specific requirements as a surface sheet) absorbed urine.
In the animal excrement disposal sheet 1 according to the present embodiment, the average absorbance on the first surface of the top sheet 2 is 700 or more, and the white degree is strong (that is, white is dark), so that the top sheet 2 is transmitted. Then, the color of the urine U (excrement) absorbed and held by the absorber 3 is less visible from the top sheet side as shown in FIG. Furthermore, the floc average value on the first surface of the top sheet 2 is 6.0 or less, and the floc ratio on the first surface is 0.6 to 1.7 (that is, the texture of the top sheet 2) The unevenness of the white color on the first surface of the topsheet 2 is small (in other words, the first surface is uniformly white), and the urine U is retained in the absorber 3. 3 and the part where the urine U is not held, as shown in FIG. 3A, it is difficult to visually recognize from the surface sheet 2 side.
Therefore, the animal excrement disposal sheet 1 according to the present embodiment is difficult to visually recognize the color of the urine U held by the absorber 3 as shown in FIG. Since the contour of the portion holding the urine U in 3 is also difficult to be visually recognized, a sufficiently excellent concealing property can be exhibited only by providing the surface sheet 2 that satisfies the above-mentioned specific requirements.
On the other hand, in the conventional animal excrement disposal sheet 100, since the top sheet 200 does not satisfy the above-mentioned specific requirements, the color of the urine U held in the absorbent body 3 itself is as shown in FIG. visibility is easy, and further, the outline of the portion holding the urine U in the absorbent body 3 also ease to be recognized Kuna'.

Here, the “average absorbance” is a physical property value indicating the degree to which the intensity of light is weakened by absorption, scattering, reflection, etc. when light passes through an object (for example, a surface sheet). Is represented by the logarithm of the ratio of the incident light intensity when the light enters the object and the transmitted light intensity when the light exits the object.
Therefore, in the present invention, the larger the average absorbance at the first surface of the surface sheet composed of white fibers, the easier the light is scattered and reflected, and the above-mentioned degree of whiteness becomes stronger (that is, white Therefore, the color of excrement such as urine absorbed and held by the absorber is difficult to visually recognize from the first surface side of the topsheet.
In addition, this average light absorbency can be measured on the measurement conditions mentioned later using the formation tester (FMT-MIII) by Nomura Corporation.

In the specification, “floc” refers to the surface of a sample photographed by a CCD camera, with average transmittance as a threshold, pixels lower than the threshold are “black”, and pixels higher than the threshold are “white”. It can be expressed and expressed in numerical form, whereby the uniformity of the fiber distribution of the topsheet (so-called uneven texture) can be evaluated.
In the present specification, all the pixels on the surface of the sampled image described above are scanned in the horizontal direction, the total number of black pixels (having a transmittance lower than the threshold value) is examined, and this is determined as one or more continuous A value obtained by dividing by the number of groups of black pixels in contact with each other is referred to as a “floc value”. Further, a floc value in the longitudinal direction L is a “first direction flock value”, and a floc value in the width direction is “second”. It is called "direction flock value". However, when the topsheet does not have a long shape having a longitudinal direction and a width direction as in the present embodiment, the flock value in any one direction is referred to as a “first direction flock value”. A flock value in another direction orthogonal to the same plane as an arbitrary direction is referred to as a “second direction flock value”.
In the present specification, the average value of the first direction flock value and the second direction flock value is referred to as a “floc average value”, and the value of the first direction flock value and the second direction flock value is the value. A value obtained by dividing the smaller flock value by the larger flock value is referred to as a “floc ratio”. Here, the average value of the floc is an index representing the degree of uniformity of the absorbance of the entire surface sheet, and the floc ratio is a deviation of absorbance in two predetermined directions (that is, the longitudinal direction L and the width direction W). It is an index to represent.
Therefore, in the present invention, the surface sheet made of white fibers has a smaller average floc value and the closer the floc ratio is to 1, the more uniformly the white fibers constituting the surface sheet are distributed unevenly. In addition, since the white color unevenness on the first surface of the surface sheet is reduced, the boundary between the portion in which the excrement such as urine is retained and the portion in which the excrement is not retained in the absorber is the surface sheet. It becomes difficult to visually recognize from the 1st surface side.
In addition, these floc average values and floc ratios are obtained by using, for example, the above-mentioned formation tester (FMT-MIII) manufactured by Nomura Corporation in the longitudinal direction L and the width direction W under the measurement conditions ( That is, the first direction flock value and the second direction flock value) can be measured and calculated from these flock values.

  Hereinafter, various members constituting the animal excrement disposal sheet 1 according to the present embodiment will be described in more detail.

As shown in FIGS. 1 and 2, the surface sheet 2 is disposed on the side to which animal excrement is supplied in the thickness direction T of the animal excrement disposal sheet 1, and excreted from the animal. It is comprised by the sheet-like member which has the liquid permeability which can transfer a thing from the supply surface (namely, 1st surface) of the said excrement to the surface (namely, 2nd surface) on the opposite side. As the liquid-permeable sheet-like member constituting such a surface sheet 2, there is no particular limitation as long as the sheet-like member is constituted by white fibers and satisfies the above specific requirements, For example, arbitrary nonwoven fabrics, such as an air through nonwoven fabric, a spun bond nonwoven fabric, and a point bond nonwoven fabric, can be used suitably. The nonwoven fabric may be subjected to a hydrophilic treatment with a surfactant.
Especially, it is preferable that the said liquid-permeable sheet-like member is an air through nonwoven fabric from the point that it is easy to form the surface sheet which satisfy | fills the above-mentioned specific requirements.

Further, the white fibers constituting the surface sheet 2 are not particularly limited as long as the fibers exhibit a white color. For example, a thermoplastic resin fiber to which a white pigment or a white dye is added, a surface structure capable of irregularly reflecting light. Alternatively, a thermoplastic resin fiber having a crystal structure can be preferably used.
In the present specification, “white” means that the L * value of the L * a * b color system is 80 or more.

Among such white fibers, the white fiber constituting the surface sheet is preferably a thermoplastic resin fiber to which a white pigment is added from the viewpoint that a surface sheet that satisfies the above-mentioned specific requirements can be easily formed. .
Here, the white pigment added to the thermoplastic resin fiber is not particularly limited. For example, titanium oxide (titanium white), zinc oxide (zinc white), a mixture of barium sulfate and zinc sulfide, basic lead carbonate (lead) White), and the like. From the viewpoint of high refractive index and low toxicity to a living body, it is preferable to use titanium oxide as the white pigment.
When titanium oxide is used as the white pigment, the content of the titanium oxide in the thermoplastic resin fiber is not particularly limited, but is preferably 1 to 3% by mass. When the white fiber constituting the surface sheet contains 1 to 3% by mass of titanium oxide having a particularly high refractive index among white pigments, a surface sheet satisfying the above-mentioned specific requirements can be obtained easily and reliably. Therefore, the above-described excellent concealability by the surface sheet can be exhibited more stably and more reliably.

The type of the thermoplastic resin fiber is not particularly limited, and is not particularly limited as long as it is a fiber made of a thermoplastic resin. Examples of the thermoplastic resin include polyethylene (PE), polypropylene (PP), and ethylene- Known resins such as olefin resins such as vinyl acetate copolymer (EVA), polyester resins such as polyethylene terephthalate (PET) and polylactic acid (PLA), polyamide resins such as 6-nylon, etc. The resins may be used alone or in combination of two or more resins.
The structure of the fiber made of such a thermoplastic resin is not particularly limited. For example, a composite fiber such as a core-sheath fiber, a side-by-side fiber, an island / sea fiber, a hollow fiber, a flat fiber, Y-shaped, C-shaped and other irregular cross-section type fibers; latent crimped or manifested crimped three-dimensional crimped fibers; split fibers divided by physical load such as water flow, heat, embossing, etc. The fibers they have may be used alone or in combination of two or more.

Among such thermoplastic resin fibers, it is preferable to use a core-sheath type thermoplastic resin fiber such as polyester (core part) / polyethylene (sheath part). In particular, the above-described titanium oxide is contained only in the core part. It is preferable to use a core-sheath type thermoplastic resin fiber.
When the above-described titanium oxide is contained only in the core portion of the core-sheath type thermoplastic resin fiber, the reflected light is reflected when the light incident on the fiber is reflected by the titanium oxide contained in the core portion. Since the sheath part covering the outer surface of the core part is refracted and emitted from the fiber, and as a result, more light can be diffusely reflected, a fiber having a strong white degree even if the content of titanium oxide is small. Can be obtained.
Furthermore, when the surface sheet is composed of such a specific core-sheath type thermoplastic resin fiber (that is, a core-sheath type thermoplastic resin fiber containing titanium oxide only in the core part), the surface sheet When manufacturing the fiber, the fibers are less likely to be bonded by titanium oxide due to heat-sealing of the sheath, etc., so that the fibers can be bonded more reliably, and the surface sheet has higher strength. It can be. As a result, the core sheet of the core-sheath type thermoplastic resin fiber constituting the surface sheet is less affected by the animal's scratching operation, etc. Can be demonstrated even more sustainably.

In addition, the fineness of the above-mentioned thermoplastic resin fiber is not particularly limited, and examples thereof include a fineness within a range of 1.1 to 8.8 dtex. From the viewpoint of the strength and flexibility of the nonwoven fabric, liquid permeability, and the like. In the range of 1.5 to 4.6 dtex.
Further, the thermoplastic resin fiber described above is, for example, a treatment using a surfactant, a hydrophilic agent, or the like (for example, kneading a surfactant inside the fiber, applying a surfactant to the fiber surface, etc.). Hydrophilic treatment may be performed.

Moreover, in the animal excrement disposal sheet 1 according to the present embodiment, the topsheet 2 is preferably composed of only white fibers in terms of concealment, but does not impair the effects of the present invention. May contain other non-white fibers and optional additives.
Examples of such other fibers include fibers made of the same thermoplastic resin as the above-described thermoplastic resin, and the content thereof is preferably 75% by mass or less of the total fibers constituting the surface sheet.
Moreover, as an arbitrary additive, a fragrance | flavor, a deodorant, an antibacterial agent, a disinfectant, etc. are mentioned, for example. Two or more of these additives may be used in combination.

In the animal excrement disposal sheet 1 according to this embodiment, as described above, the top sheet 2 has an average absorbance of 700 or more, more preferably 800 or more, on the first surface serving as the excrement supply surface.
Further, the average absorbance of the first surface is not particularly limited in terms of concealability, but is preferably 2000 or less, and more preferably 1800 or less.
If the average absorbance of the first surface of the topsheet 2 is 2000 or less, the excrement retained in the absorber 3 is not completely concealed, so that the owner of the animal (for example, a dog, etc.) The presence / absence of the excrement disposal sheet can be accurately recognized while being difficult to see.

  The means for controlling the average absorbance of the surface sheet (for example, making the average absorbance 700 or more) is not particularly limited, and for example, adjusting the content of the white pigment contained in the fibers constituting the surface sheet. In addition, examples of the fibers constituting the surface sheet include employing a thermoplastic resin fiber having a surface structure or crystal structure that easily diffuses light.

  Moreover, as above-mentioned, the surface sheet 2 has the floc average value of the 1st surface used as the excretion supply surface of 6.0 or less, and the floc ratio of the said 1st surface is 0.6-1.7. It is. These floc average values and floc ratios are more preferably 5.0 or less and 0.7 to 1.4, respectively.

  Means for controlling the average floc value and floc ratio of such a surface sheet (for example, the average floc value is 6.0 or less and the floc ratio is 0.6 to 1.7) is not particularly limited. For example, the type of non-woven fabric (for example, air-through non-woven fabric), basis weight, thickness, type of thermoplastic resin fiber (for example, core-sheath type thermoplastic resin fiber), white pigment content, etc. For example, it is possible to appropriately select or adjust various components such as the above.

Moreover, it is preferable that the surface sheet 2 has a concavo-convex structure in which convex portions and concave portions exist irregularly over substantially the entire first surface, and further has a flat structure on the second surface. It is particularly preferable. When the first surface of the topsheet has such an irregular concavo-convex structure, the visibility of the absorber located on the second surface side of the topsheet is different in the convex and concave portions of the concavo-convex structure, The outline of the part holding the excrement in the absorbent body is less visible. In addition, when the first surface (excretion excretion surface) of the top sheet 2 has such a concavo-convex structure, the concavo-convex structure allows an animal such as a dog riding on the animal excrement disposal sheet 1 to be used. Since the frictional resistance between the sole of the foot and the first surface of the top sheet 2 is increased, the animal is less likely to slip on the top sheet 2 when excreting, and can be excreted without feeling stress.
Furthermore, if the second surface of the topsheet facing the absorber has a flat structure, a gap is less likely to be formed between the second surface of the topsheet and the absorber (that is, the topsheet) Because the second surface and the absorbent body are easily in close contact with each other), animal excrement supplied on the first surface of the topsheet is easily drawn into the absorbent side by capillary action, and the excretion absorption rate is improved. In addition, the remaining liquid of excrement on the surface sheet can be prevented.
Therefore, in the animal excrement disposal sheet using such a surface sheet, traces of excrement on the surface sheet are hardly visible.

In the present embodiment, the thickness of the topsheet 2 is not particularly limited as long as the above specific requirements are satisfied, but is preferably 0.5 mm or more. When the thickness of the topsheet is 0.5 mm or more, the first surface of the topsheet (that is, the excrement supply surface) and the absorber that holds the excrement are separated by a certain amount (that is, 0.5 mm or more). For this reason, the excrement held in the absorber is further less visible.
In addition, the thickness of a surface sheet can be measured as follows, for example, using COMPRESSION TESTER (made by Kato Tech Co., Ltd., model: KES-FB3 AUTO-A) as a measuring device. In measuring the thickness of the top sheet, the sample for measurement sampled from the top sheet is placed in the above-mentioned measuring device, and the thickness when the pressure applied to the sample for measurement by the measuring terminal is 0.5 g / cm ² is measured. To do. For the thickness of the top sheet, the average value of the measured values at N = 10 is adopted.

In the present embodiment, the basis weight of the topsheet 2 is not particularly limited as long as the above-described specific requirements are satisfied, but is preferably 20 g / m ² or more, particularly 22 g / m ^{2 to} 25 / m ^2. preferable. When the basis weight of the surface sheet is 20 g / m ² or more, the distance between fibers of the fibers constituting the surface sheet is within a predetermined range, and therefore the absorbent body holding excrement is further visually recognized due to the denseness of the fibers. While becoming difficult, in the said surface sheet, the capillary phenomenon which transfers excrement from the 1st surface to the 2nd surface can be expressed more effectively.
Therefore, the animal excrement disposal sheet using such a surface sheet can exhibit further excellent concealment performance and high absorption performance (absorption rate).

  Next, the absorber 3 of the animal excrement disposal sheet 1 according to this embodiment will be described in detail.

As shown in FIG. 2, the absorber 3 is disposed on the opposite side (that is, the second surface side) of the excrement supply surface (first surface) of the topsheet 2 and passes through the topsheet 2. It is an absorptive member that absorbs and retains excreted waste. The topsheet 2 and the absorbent body 3 are joined by an arbitrary adhesive such as a hot melt adhesive, and the adhesive has a basis weight (for example, 0.1 to 0.1) that does not hinder the passage of excrement. 10 g / m ² ) and a coating form (for example, a spiral shape, a dot shape, a stripe shape, etc.), and is disposed between the top sheet 2 and the absorber 3.

  In this embodiment, as shown in FIGS. 1 and 3, the absorber 3 has a substantially rectangular outer shape in plan view, and is located in the central region of the animal excrement disposal sheet 1. However, the present invention is not limited to such an embodiment, and the absorbent body may have an arbitrary plan view shape other than a rectangle, and the center of the animal excrement disposal sheet. To be arranged in any direction.

In the present embodiment, as shown in FIG. 2, the absorbent body 3 is located on the surface sheet side and has a hydrophilic colored sheet 31 colored in any color such as blue, green, yellow, orange, red, and the like. An absorption core 32 which is located on the back sheet side and is formed of an absorbent material for absorbing and holding excrement, and at least one liquid covering the colored sheet 31 and the absorption core 32 from the back sheet side And a core wrap sheet 33 made of a permeable sheet.
Further, as shown in FIG. 2, the absorbent core 32 is located on the top sheet side and is composed of a first absorbent core 321 constituted by the absorbent polymer 321 a as the absorbent material, and on the back sheet side, and It is comprised by the 2nd absorption core 322 comprised by the absorptive polymer 322a and the water absorbing fiber 322b as said absorptive material.

The colored sheet 31 is made of tissue paper colored in any color such as blue, green, yellow, orange, red, etc. (for example, a basis weight of 13.5 g / m formed from softwood bleached kraft pulp as a main raw material) ^In the absorbent body 3, the absorbent core 32 is disposed so as to cover the surface of the absorbent core 32 on the surface sheet side, thereby preventing the absorbent core 32 from being out of shape. When the colored sheet 31 is colored in such a color, the color of the excrement held in the absorption core 32 is not conspicuous due to the color of the colored sheet 31, so the excrement held in the absorber 3 Becomes more difficult to see from the surface sheet side.
In the present embodiment, the colored sheet 31 and the absorbent core 32 are bonded by water spray. When this water spray is produced, the absorbent body 32 (specifically, the first absorbent core 321 made of the absorbent polymer 321a) (that is, the top sheet side in the animal excrement disposal sheet) is produced. This is an adhesive means in which water is sprayed on the surface and the colored sheet 31 is adhered thereon. The sprayed water is then evaporated, and the sprayed portion of the water is in a dry state. Therefore, the colored sheet 31 and the absorption core 32 (specifically, the first absorption made of the absorbent polymer 321a). The core 321) is directly joined. When the colored sheet 31 and the absorbent core 32 are adhered by such a water spray, no adhesive is interposed between the colored sheet 31 and the absorbent core 32, and excretion of urine or the like that has migrated from the top sheet side. Since the object can be quickly absorbed by the absorbent core 32, the above-mentioned concealing effect and deodorizing effect can be exhibited immediately after excretion of the animal, and a comfortable breeding environment for the animal owner and the like is provided. Can do.

In the present embodiment, the entire colored sheet 31 is colored in an arbitrary color such as blue, green, yellow, orange, and red. However, in the present invention, the colored sheet 31 is not limited to such an aspect. It suffices to have a colored region at least partially.
Such a colored region may be composed of a single color or may be composed of a plurality of types of colors, and the colored region may be any form such as a pattern, a pattern, or a character with a color. Can be configured.
If the colored area of the colored sheet is configured in the form of a pattern, pattern, character, etc. with such a color, the outline of the excrement held in the absorption core (that is, the excrement in the absorption core is held) The boundary between the portion and the portion where the excrement is not retained is not noticeable due to the pattern or pattern of the colored sheet, so that the excrement retained in the absorber is further less visible from the top sheet side.
The coloring means for forming the colored region is not particularly limited, and any coloring means such as dyeing or printing can be employed.

Here, Fig.4 (a) is the top view which looked at the excrement disposal sheet | seat 10 for animals which concerns on another embodiment of this invention from the surface sheet side, FIG.4 (b) is FIG.4 (a). It is a top view which shows typically the state after the animal excrement disposal sheet | seat 10 absorbs urine as excrement.
The animal excrement disposal sheet 10 according to another embodiment is a hydrophilic sheet having a colored region that is colored in a single color and has a floral pattern as a colored sheet included in the absorbent body 3A. Except having adopted this tissue paper, it has the same configuration as the animal excrement disposal sheet 1 according to the above-described embodiment (see FIG. 4A).

  When the urine U excreted from the animal is absorbed and held in the absorbent body 3A (particularly, the colored sheet and the absorbent core), the animal excrement disposal sheet 10 according to this another embodiment is shown in FIG. As shown in the above, the color and contour of the absorbed and retained urine U are not conspicuous due to the color and floral pattern in the colored region of the colored sheet, so that in addition to the concealing action by the surface sheet, The urine U absorbed and held in the absorber 3A is further less visible.

  In addition, the sheet | seat member which comprises a colored sheet is not restrict | limited in particular, Arbitrary nonwoven fabrics, such as an air through nonwoven fabric and a spun bond nonwoven fabric other than the above-mentioned tissue paper, can be used, for example.

  Hereinafter, the absorption core 32 in the animal excrement disposal sheet 1 according to the above-described embodiment will be described in more detail.

In this embodiment, the absorption core 32 is comprised by the 1st absorption core 321 located in the surface sheet side, and the 2nd absorption core 322 located in the back surface sheet side as above-mentioned.
Furthermore, as shown in FIG. 2, the first absorbent core 321 is composed of a granular absorbent polymer 321a that exists in a state of being dispersed in a planar shape between the colored sheet 31 and the second absorbent core 322 described above. And the 2nd absorption core 322 is comprised by the mixture of the granular absorbent polymer 322a and the water absorbing fiber 322b arrange | positioned between the above-mentioned 1st absorption core 321 and the core wrap sheet | seat 33. FIG.

The absorbent polymer 321a constituting the first absorbent core 321 and the absorbent polymer 322a constituting the second absorbent core 322 may be the same absorbent polymer or different absorbent polymers. The absorbent polymer used in the present embodiment is not particularly limited as long as it can absorb and retain a liquid. For example, any superabsorbent polymer such as polyacrylic acid-based, starch-based, or cellulose-based polymer can be used. Can be adopted. The basis weight of the absorbent polymer is not particularly limited, but from the viewpoint of liquid absorbency, the basis weight of the absorbent polymer 321a constituting the first absorbent core 321 is 20 g / m ^{2 to} 50 g / m ² . preferably in the range, the basis weight of the absorbent polymer 322a included in the second absorbent core 322 ^is preferably in the range of ^{8g / m 2 ~30g / m 2} .

The water-absorbing fiber contained in the second absorbent core 322 is not particularly limited as long as it can absorb and retain a liquid, and for example, a cellulosic water-absorbing fiber such as pulp (for example, fluff pulp) is used. be able to.
The basis weight of absorbent fibers is not particularly limited, in terms of the absorption of ^liquid, preferably in the range of ^{30g / m 2 ~150g / m 2} .

In the animal excrement disposal sheet 1 according to the present embodiment, the absorbent core 32 included in the absorbent body 3 includes the first absorbent core 321 and the second absorbent core 322 as described above. Permeated excrement passes between the absorbent polymer 321a of the first absorbent core 321 to the second absorbent core 322 by the affinity of water absorbent fibers 322b such as pulp contained in the second absorbent core 322. It is easy to be drawn. Thereby, since the excrement processing sheet 1 for animals which concerns on this embodiment can make the absorber 3 absorb rapidly excrement, such as urine, it can exhibit the above-mentioned concealment effect immediately after excretion of an animal. It is possible to provide a comfortable breeding environment for animal owners. Moreover, since the excrement disposal sheet | seat 1 for animals which concerns on this embodiment becomes difficult for excrement, such as urine, to remain between the surface sheet 2 and the absorber 3, the said excrement disposal sheet | seat 1 for animals is used. Animal feet and hair are less likely to get wet.
Further, when the absorbent core 32 included in the absorbent body 3 is configured by the first absorbent core 321 and the second absorbent core 322 as described above, an animal excrement disposal sheet according to the present embodiment can be used for animals such as dogs. Even when the excrement held between the water absorbent fibers 322b contained in the second absorbent core 322 oozes out when it is ridden on the animal's feet, the oozing out Since excrement can be absorbed by the absorbent polymer 322a included in the second absorbent core 322 and the absorbent polymer 321a of the first absorbent core 321 located on the topsheet 2 side, the first of the topsheet 2 It becomes difficult for excrement to return toward one surface (excrement supply surface). Thereby, it can prevent that an animal's leg | foot becomes dirty or bad smell generate | occur | produces with the excrement which returned from the absorber 3. FIG.
Further, in the animal excrement disposal sheet 1 according to the present embodiment, the absorbent body 3 includes the absorbent polymer 321a of the first absorbent core 321 and the absorbent polymer 322a and the water absorbent fibers 322b included in the second absorbent core 322. Is contained as an absorptive material, the amount of water retained is large as a whole of the absorber, and excreta excreted from animals can be reliably absorbed and retained for a long time.

In the above-described embodiment, the absorption core 32 included in the absorber 3 is configured by the first absorption core 321 and the second absorption core 322 as described above, but in the present invention, such a configuration is used. It is not limited, The absorption core may be comprised from the single absorption core conventionally, or may be comprised from the 3 or more several absorption core.
Moreover, the absorptive material which comprises an absorptive core is not limited to the above-mentioned absorptive polymer and a water absorbing fiber, Arbitrary absorptive materials conventionally used in this technical field can be employ | adopted.

Moreover, in this embodiment, the core wrap sheet | seat 33 is a tissue paper similar to the above-mentioned colored sheet | seat 31 (For example, basis weight formed from softwood bleached kraft pulp as a main raw material is 13.0 g / m < ² > -13. 5g / m ² tissue paper or the like), and arranged in the absorbent body 3 so as to cover the colored sheet 31 and the absorbent core 32 from the back sheet side. This is to prevent misalignment or the like.
In the present invention, the core wrap sheet is not particularly limited as long as it has liquid permeability and can prevent the deformation of the absorbent core. In addition to the tissue paper described above, for example, an air-through nonwoven fabric, a spunbond Arbitrary nonwoven fabrics, such as a nonwoven fabric, can be used.

  Next, the backsheet 4 used for the animal excrement disposal sheet 1 according to the present embodiment will be described in more detail.

In the present embodiment, as shown in FIG. 2, the back sheet 4 faces the floor surface or the ground on which the animal excrement disposal sheet 1 is placed in the thickness direction T of the animal excrement disposal sheet 1. The liquid-impermeable sheet member prevents the leakage of excretion excreted from the animal.
The liquid-impermeable sheet member that constitutes such a back sheet 4 is not particularly limited. For example, a non-breathable resin film such as polyethylene or polypropylene, a laminate in which a nonwoven fabric is bonded to the resin film, water repellency Or a hydrophobic nonwoven fabric etc. can be used conveniently.

The animal excrement disposal sheet of the present invention as in the above-described embodiment can be manufactured, for example, as follows.
(1) Manufacture of a surface sheet Carding a fiber (for example, a core-sheath type composite fiber of PET (core part) / PE (sheath part)) containing a white pigment (for example, titanium oxide) at a predetermined content. Then, the core-sheath composite fiber is opened in the carding device to form a web. While transporting the formed web further downstream in the transport direction, for example, it is transported to an air-through heating device, and the fibers in the web are entangled in the heating device to form a hydrophilic sheet that becomes a top sheet. A non-woven fabric is obtained.
In addition, when forming the above-mentioned concavo-convex structure on the first surface of the top sheet, for example, by blowing high-pressure air evenly on one surface (first surface) of the hydrophilic nonwoven fabric, the above-mentioned The above concavo-convex structure can be formed over substantially the entire first surface of the nonwoven fabric.
(2) Manufacture of Absorber Prepare a substantially flat second absorbent core containing the above-described absorbent material, and dispose a predetermined amount of absorbent polymer uniformly on one surface of the second absorbent core. 1 absorption core is formed and the absorption core which consists of a laminated body of the said 1st absorption core and a 2nd absorption core is obtained. Furthermore, after affixing the above-mentioned colored sheet to the upper surface of this absorption core, an absorber is obtained by coat | covering the said colored sheet and absorption core with arbitrary core wrap sheets.
(3) Manufacture of animal excrement disposal sheet After joining the second surface of the top sheet to one surface of the absorber on the colored sheet side using, for example, a hot melt adhesive, the absorber On the other surface of the second absorbent core side, for example, a non-ventilated sheet made of polyethylene is disposed as a back sheet, and the top sheet and the back sheet are sandwiched between the top sheet and the back sheet. The animal excrement disposal sheet of the present invention as in the above-described embodiment can be obtained by joining the peripheral portions of the back sheet with a hot-melt adhesive.

The animal excrement disposal sheet of the present invention is not limited to the above-described embodiments and examples to be described later, and can be appropriately combined and modified within the scope of the purpose and spirit of the present invention. is there. For example, in still another embodiment of the present invention, the animal excrement disposal sheet has a longitudinal direction L and / or a width direction between the top sheet and the absorbent body, between the absorbent body and the back sheet, or both. An intermediate sheet having liquid diffusibility may be provided in W. Since the excrement disposal sheet for animals includes such an intermediate sheet, the excrement can be absorbed by the absorber while being diffused in the longitudinal direction L and / or the width direction W by the intermediate sheet. In addition to the excellent concealment performance, it is possible to exhibit high absorption performance such as excellent absorption efficiency and difficult liquid return.
In this specification, ordinal numbers such as “first” and “second” are used to distinguish items with the ordinal numbers, and mean the order, priority, importance, etc. of each item. Not what you want.

  Hereinafter, the present invention will be described more specifically by way of examples and comparative examples. However, the present invention is not limited to these examples.

Example 1
A core-sheath type composite fiber (fineness 2.2 dtex, fiber length 51 mm) of PET (core part) / PE (sheath part) containing titanium oxide, which is a white pigment, in the core part at a content of 2.40% by mass. This was supplied to a carding device, and the core-sheath type composite fiber was opened in the carding device to form a web. While the formed web is further transported downstream in the transport direction, it is transported to an air-through heating device, and the fibers in the web are entangled in the heating device to form a hydrophilic sheet that becomes the top sheet of Example 1. A non-woven fabric was obtained. The surface sheet of Example 1 thus obtained had a basis weight of 22 g / m ² and a thickness of 0.99 mm.

Example 2
Example 1 except that the content of titanium oxide contained in the core portion of the core-sheath composite fiber was 2.43 mass%, and the basis weight and thickness of the topsheet were 25 g / m ² and 1.30 mm, respectively. In the same manner as above, a top sheet of Example 2 was produced.

Example 3
A surface sheet of Example 3 was produced in the same manner as Example 1 except that the basis weight and thickness of the surface sheet were 20 g / m ² and 0.77 mm, respectively.

Comparative Example 1
The content of titanium oxide contained in the core of the core-sheath composite fiber is 2.43 mass%, the basis weight and thickness of the topsheet are 25 g / m ² and 1.30 mm, respectively. Comparative Example 1 was performed in the same manner as in Example 1 except that a grooved structure constituted by a plurality of flanges extending in one direction and a groove formed between adjacent flanges was formed on the surface. A top sheet was prepared.

Comparative Example 2
Example 1 except that the content of titanium oxide contained in the core portion of the core-sheath composite fiber was 0.45% by mass, and the basis weight and thickness of the topsheet were 25 g / m ² and 1.29 mm, respectively. In the same manner, a top sheet of Comparative Example 2 was produced.

Comparative Example 3
Example 1 except that the content of titanium oxide contained in the core portion of the core-sheath composite fiber was 0.04% by mass, and the basis weight and thickness of the topsheet were 17 g / m ² and 0.18 mm, respectively. In the same manner, a top sheet of Comparative Example 3 was produced.

Comparative Example 4
Example 1 except that the content of titanium oxide contained in the fibers constituting the surface sheet is 0.04% by mass or less, and the basis weight and thickness of the surface sheet are 8 g / m ² and 0.13 mm, respectively. Similarly, the top sheet of Comparative Example 4 was produced.

Comparative Example 5
Example 1 except that the content of titanium oxide contained in the fibers constituting the surface sheet is 0.04% by mass or less, and the basis weight and thickness of the surface sheet are 17 g / m ² and 0.65 mm, respectively. Similarly, the surface sheet of Comparative Example 5 was produced.

  With respect to the top sheets of Examples 1 to 3 and Comparative Examples 1 to 5 thus obtained, the average absorbance, flock average value, and flock ratio of the first surface were measured according to the following measurement method. Moreover, the concealability of each surface sheet of Examples 1 to 3 and Comparative Examples 1 to 5 was evaluated according to the following visual evaluation method. These measurement results and evaluation results are shown in Table 1 below.

[Measurement method of average absorbance, floc average value and floc ratio]
(1) A test piece of 30 cm × 20 cm is collected from the surface sheet to be measured.
(2) Using a formation tester (product number: FMT-MIII, manufactured by Nomura Corporation), light is irradiated with a tungsten current of a DC constant current (6V30W) from the lower side of the test piece placed on the diffusion plate.
(3) Using a CCD camera, a transmission image obtained by photographing a range of 25 cm × 18 cm is decomposed into 320 × 230 (= 73,600) pixels, and the intensity of light received by each pixel is measured. A direction (first direction) flock value and a left-right direction (second direction) flock value are calculated. As other measurement conditions, the measurement value of each pixel is 10 bits, the moving average pixel is 1, and the flock processing is 1.
(4) An average flock value is calculated by dividing the sum of both values by 2 from the obtained first direction flock value and second direction flock value, and the first direction flock value and the second direction flock value. Of these, the flock ratio is calculated by dividing the smaller flock value by the larger flock value.

[Visual evaluation method]
(1) A sample for evaluation is produced by covering the surface sheet to be evaluated on an arbitrary absorber including tissue paper colored in blue.
(2) A predetermined amount of water colored yellow as a simulated urine is dropped on the top sheet of the sample for evaluation.
(3) After the simulated urine is absorbed by the absorber, the mode in which the simulated urine is visually recognized from the top sheet side is determined according to the following criteria.
(4) The above steps (1) to (3) are performed seven times, and the average is calculated as the evaluation value.
(Criteria)
4 points: The simulated urine is hardly visible 3 points: The simulated urine is difficult to see 2 points: The simulated urine is easily visible 1 point: The simulated urine is easily visible 0 point: The simulated urine is clearly visible

  As shown in Table 1, the top sheets of Examples 1 to 3 that satisfy the above-described specific requirements related to the average absorbance, the average flock value, and the flock ratio are compared to the top sheets of Comparative Examples 1 to 5 that do not satisfy the specific requirements. Thus, it was found that the concealability after absorption of simulated urine was excellent.

DESCRIPTION OF SYMBOLS 1 Animal excrement disposal sheet 2 Surface sheet 3 Absorber 31 Colored sheet 32 Absorption core 321 1st absorption core 322 2nd absorption core 33 Core wrap sheet 4 Back sheet

Claims (3)

A dog excrement disposal sheet comprising: a liquid-permeable top sheet composed of white fibers; a liquid-impermeable back sheet; and an absorber disposed between these sheets. ,
The top sheet is a waste supply surface, which is formed by evenly blowing high-pressure air, and has a first surface having a concavo-convex structure in which convex portions and concave portions exist irregularly over the entire surface, A second surface having a flat structure opposite to the first surface,
The surface sheet has an average absorbance of the first surface of 700 or more, an average floc value of the first surface of 6.0 or less, and a floc ratio of the first surface of 0.6 to 1. 7,
The top sheet is an air-through nonwoven fabric having a thickness of 0.5 mm or more and a basis weight of 20 g / m ² or more,
The white fiber contains titanium oxide, and the content of the titanium oxide in the fiber is 1 to 3% by mass;
The white fiber is composed of a core-sheath type thermoplastic resin fiber, and the titanium oxide is contained only in a core part of the core-sheath type thermoplastic resin fiber,
The excrement disposal sheet for dogs.   The excrement disposal sheet for dogs according to claim 1, wherein the surface sheet has an average absorbance of 2000 or less on the first surface. The absorber has an absorbent core that includes an absorbent material;
The excrement disposal sheet for dogs according to claim 1 or 2, wherein a colored sheet having a colored region is disposed at least partially between the top sheet and the absorbent core.