JP5150475B2 - Top sheet for excrement absorbent article for pet, and pet excretion absorbent article having the same - Google Patents

Description

  The present invention relates to a top sheet for a pet excreta absorbent article, and a pet excreta absorbent article having the same.

In recent years, pets such as dogs and cats are like families, and people and pets often live in the same space. Thus, in order to realize a comfortable symbiosis, there is a need for a pet excreta absorbent article that is excellent in concealment against dirt caused by pet excrement.
2. Description of the Related Art A sheet-type pet excreta absorbing sheet is known as a urine processing molded product for pets kept indoors. The excreta absorbing sheet for pets has a liquid permeable top sheet, an absorbent body, and a liquid-impermeable back sheet in order from the top, so that pet urine can be retained in the absorbent body.

Animals such as dogs and cats recognize a colored portion such as blue. Conventionally, a blue pet excreta absorbing sheet has been used in order to make use of this fact so that it can be excreted on a colored sheet. Patent Document 1 discloses a pet excreta absorbent sheet in which only the central portion is colored with blue or the like. This is aimed at making money to excrete only in the center.
However, the blue sheet has a problem that urine traces are conspicuous. Such a pet excreta absorption sheet with noticeable urine traces is unsuitable for installation for a long time in a room where many people go in and out because the owner feels unsanitary or the pet hate to use it. It was necessary to change every excretion.
In recent years, the number of co-working households has increased, and it is difficult to replace the pet excrement absorbing sheet each time, and there is a need for a pet excrement absorbing sheet that does not show urine traces even when installed for a long time.
Therefore, in order to make urine traces inconspicuous, pet excreta absorbing sheets colored in green are commercially available.
Japanese Patent No. 3548384

  However, the conventional excrement absorbing sheet for pets colored in green has a problem that the ring stain of urine traces is conspicuous and the concealment property of urine traces is not sufficient, which is preferable for installing in a room for a long time. It wasn't.

  The present invention has been made in view of the above circumstances, and has a surface sheet for a pet excreta absorbent article that has excellent concealability against dirt caused by pet excrement and can be used for a long time, and a pet having the same An object is to provide an excreta absorbent article.

  The top sheet for a pet excreta absorbent article of the present invention is a pet excrement having a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent body provided therebetween. A surface sheet for absorbent articles, consisting of two layers, an upper layer and a lower layer, the upper layer is white, has a plurality of apertures, and the lower layer is colored Munsell hues 2.5YR to 7.5GY to 10.0BG It is characterized by being.

In the top sheet for a pet excreta absorbent article of the present invention, the upper layer preferably has an opening rate of 32 to 50%, an opening density of 50 to 200 holes / cm ² , and a thickness of 300 to 1000 μm.

  In the top sheet for a pet excreta absorbent article of the present invention, the upper layer has a two-stage structure of an upper stage and a lower stage, and the upper stage has a higher porosity than the lower stage. preferable.

  The pet excreta absorbent article of the present invention has a top sheet for the pet excreta absorbent article of the present invention, a liquid-impermeable back sheet, and an absorbent body provided therebetween. It is characterized by that.

The top sheet for pet excreta absorbent articles of the present invention is excellent in concealing property against dirt caused by pet excreta, and allows pet excreta absorbent articles to be used for a long time.
In addition, the pet excreta absorbent article of the present invention has excellent concealability against dirt caused by pet excrement and can be used for a long time.

Hereinafter, the present invention will be described in detail.
As shown in FIG. 1, a top sheet 11 for pet excreta absorbent articles according to the present invention includes a liquid-permeable top sheet 11, a liquid-impermeable back sheet 13, and a gap between them. The top sheet is used for the pet excreta absorbent article 10 having the absorbent body 12 and has two layers, an upper layer 14 and a lower layer 15.

[Surface sheet for pet excreta absorbent article]
(Upper layer)
In the top sheet 11 for pet excrement absorbent articles shown in FIG. 1, the upper layer 14 disposed on the surface on which pet excrement first hits is white and has a plurality of openings.
As the upper layer, it is preferable to use a white perforated film made of a thermoplastic resin such as a polyolefin such as polyethylene or polypropylene, a polyester such as polyethylene terephthalate, or a vinyl polymer such as polyvinyl chloride.

The basis weight of the apertured film made of polyethylene or the like is preferably 15 to 35 g / m ² , particularly preferably ²⁰ to 30 g / m ² . In the present invention, when a hole for liquid permeation is formed in the film, it is preferable to process the hole so as to extend downward from the surface of the film.
At this time, it is preferable that the holes are formed in a mortar shape. If the shape of the hole is a mortar shape like the hole 22 in FIG. 3, not only does the urine easily flow downward, but the absorption of the urine is accelerated, and the diameter of the opening surface on the absorber side is reduced, so Difficult to reverse.
The upper layer according to the present invention indicates from the surface of the apertured film to the bottom of the hole extending downward from the surface of the apertured film, and the thickness is preferably 300 to 1000 μm, and is preferably 320 to 800 μm. And more preferably 350 to 600 μm. If the thickness of the upper layer is 300 μm or more, the strength is maintained to such an extent that the pet is not easily torn even when the pet is scratched during use. On the other hand, when the thickness is 1000 μm or less, holes are easily formed when the sheet is processed.

The hole area ratio per area of the upper layer is preferably 32 to 50%, and more preferably 35 to 50%. When the open area ratio is 32% or more, urine hardly remains on the surface of the pet excreta absorbent article, and when it is 50% or less, the urine trace concealability is good.
Moreover, when the hole area ratio per area of the upper layer is the hole area ratio, the hole density of the upper layer is preferably 50 to 200 holes / cm ² , more preferably 50 to 180 holes / cm ² , Particularly preferred is 50 to 150 holes / cm ² . If the hole density is 50 holes / cm ² or more, the urine traces are well concealed, and if it is 200 holes / cm ² or less, urine hardly remains on the surface of the pet excreta absorbent article.

  As shown in FIGS. 2 and 3, even if the film 21 has a one-stage structure having holes 22, the film forms an upper stage 31 and a lower stage 32 as shown in FIGS. Alternatively, a two-stage structure having a hole 33 in the lower stage 32 may be used.

As shown in FIG. 3, when the upper layer of the top sheet for pet excreta absorbent articles has a one-stage structure, when the pet steps on it, the urine held by the absorber reverses, Legs may get wet.
However, when the upper layer of the top sheet for a pet excreta absorbent article has an upper stage and a lower stage as shown in FIG. 5, the pet's feet will step on the upper part. Therefore, it is not preferable to step on the lower part where the urine may be reversed, the pet's feet are not wetted, and it is hygienic and preferable for pets kept indoors.

As shown in FIG. 5, when the upper layer has a two-stage structure having an upper stage 31 and a lower stage 32, it is preferable that the upper stage has a higher hole area ratio than the lower stage.
The hole area ratio per area of the lower stage is preferably 32 to 50%, and more preferably 35 to 50%. When the open area ratio is 32% or more, urine hardly remains on the surface of the pet excreta absorbent article, and when it is 50% or less, the urine trace concealability is good. On the other hand, the hole area ratio per upper area is preferably 50 to 99%, more preferably 55 to 97%, and particularly preferably 60 to 95%. When the hole area ratio is 50% or more, the area where the pet's feet come into contact with the top sheet for the pet excreta absorbent article decreases, and when it is 99% or less, the upper hole area ratio is too large. There is no such thing as your feet touching the bottom.
At this time, it is preferable that the upper hole density is lower than the lower hole density.
The lower hole density is preferably 50 to 200 holes / cm ² , more preferably 50 to 180 holes / cm ² , and particularly preferably 50 to 150 holes / cm ² . If the hole density is 50 holes / cm ² or more, the urine traces are well concealed, and if it is 200 holes / cm ² or less, urine hardly remains on the surface of the pet excreta absorbent article. On the other hand, the opening density in the upper stage is preferably 1 to 25 holes / cm ² , more preferably 1.5 to 20 holes / cm ² , and particularly preferably ² to 15 holes / cm ² . If the hole density is 1 hole / cm ² or more, the upper hole density is too small and the pet's foot does not directly touch the lower stage. If the hole density is 25 holes / cm ² or less, the pet's foot However, the area in contact with the surface sheet for pet excreta absorbent articles is reduced.

Furthermore, the thickness of the upper stage is preferably 100 to 900 μm, and more preferably 200 to 800 μm. At this time, the thickness of the lower stage is preferably 100 to 900 μm, and more preferably 200 to 800 μm.
If the thickness of the upper stage is 100 μm or more, the lower part where urine may return is not stepped on directly, and if it is 900 μm or less, urine absorption is not hindered. Moreover, if the thickness of the lower stage is 100 μm or more, urine reversion can be eliminated, and if it is 900 μm or less, urine absorption is not hindered.

(Underlayer)
In the top sheet 11 for pet excreta absorbent articles shown in FIG. 1, the lower layer 15 disposed on the absorber 12 side is colored with a Munsell hue of 2.5YR to 7.5GY to 10.0BG. It is characterized by that.
The Munsell hue is an attribute among the three attributes that represent the colors of the system (color system) for numerically representing the colors created by Albert H. Munsell (1858-1918) in the United States. One. The other two attributes are brightness and saturation. Hue represents the type of color. Munsell has five basic colors, red (R), yellow (Y), green (G), blue (B), purple (P) and five intermediate colors, yellow red (YR), yellow green (GY ), Blue-green (BG), blue-violet (PB), and red-purple (RP). Furthermore, those hues were expressed by a total of 100 hues divided by 10. Those arranged in a circle in order are called a hue circle. In the hue circle, the basic five colors of each color are represented by 5, and 10 divided colors are represented by 10 and added to the initial letter of the color name. 5Y for yellow and 10BG for blue-green. In the case of 100 divided colors, 1 to 4 and 6 to 9 are added, respectively.

The lower Munsell hue is 2.5YR to 7.5GY to 10.0BG, preferably 7.5YR to 7.5GY to 2.5BG, and more preferably 7.5Y to 7.5GY to 10.0G. preferable. If the lower Munsell hue is in the range of 2.5YR to 7.5GY to 10.0BG, the urine traces are excellent in concealment and the color of hematuria can be confirmed, so that pet health management can be performed.
However, when the lower Munsell hue is in the range of 10PB to 10B to 1.0B, the urine trace hiding property tends to be inferior. Moreover, when the lower Munsell hue is in the range of 1YR to 10PR to 1P, the color of hematuria cannot be confirmed, which may hinder pet health management.

As the lower layer, thin paper, tissue, diffusion paper, crepe paper, water absorbent paper or non-woven fabric is preferable.
Specific examples of the nonwoven fabric include a spunlace nonwoven fabric formed of cellulosic fibers such as pulp and rayon, a spunlace nonwoven fabric formed of the cellulose fibers and a synthetic resin fiber that has been subjected to hydrophilic treatment, and a heat treatment that has undergone hydrophilic treatment. Examples thereof include an air-through non-woven fabric formed of adhesive synthetic resin fibers and a point-bonded non-woven fabric formed of hydrophilic heat-sealable synthetic resin fibers. Alternatively, it is preferable to use a hydrophilic bonded spunbond nonwoven fabric or a composite nonwoven fabric obtained by laminating microfibers to a spunbond nonwoven fabric, specifically, a three-layer composite nonwoven fabric of meltblown nonwoven fabric / spunbond nonwoven fabric / meltblown nonwoven fabric.

[Back sheet]
In the pet excreta absorbent article 10 shown in FIG. 1, the back sheet 13 is liquid impermeable to prevent urine leakage. The back sheet is preferably formed of a resin film made of polyethylene, polyethylene terephthalate or the like, a multilayer resin film in which a polyethylene film and a polypropylene film are laminated, or a water-repellent or hydrophobic nonwoven fabric. This nonwoven fabric is a melt blown nonwoven fabric or a spunbond nonwoven fabric, or a laminated nonwoven fabric in which a meltblown nonwoven fabric and a spunbond nonwoven fabric are laminated.
The thickness of the back sheet is preferably 15 to 30 μm, and more preferably 20 to 25 μm. If the thickness of the back sheet is 15 μm or more, it is strong enough to be torn during use and disposal, and if it is 30 μm or less, it can be easily folded and packed in various forms. .

〔Absorber〕
In the pet excreta absorbent article 10 shown in FIG. 1, the type of the absorbent body 12 is not particularly limited as long as it is an absorbent substance that absorbs liquid such as urine. For example, cotton-like pulp, broken wood pulp, etc. And absorbent polymers such as superabsorbent polymers, mixed loaded bodies thereof, tissue paper, and those in which these absorbent substances are sandwiched between paper (mounting paper) and non-woven fabric.
As such an absorbent body, for example, as shown in FIG. 6, the absorbent polymer 17 is distributed and arranged so that the absorbent polymer 17 is localized on the surface sheet 11 side in the aggregate of pulp 16 such as fluff pulp, and the whole is a thin paper 18 or the like. Those formed by being covered with a thin mount can be suitably used. By dispersing and arranging the absorbent polymer 17 in the pulp 16 so as to be localized on the surface sheet 11 side, a liquid such as urine can be efficiently absorbed. Further, by covering the absorbent body 12 with the thin paper 18, it is possible to ensure the retention and prevent the absorbent polymer 17 and the deodorant 19 described later from falling off.
In FIG. 6, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

The absorbent polymer 17 is dispersed and arranged so as to be localized on the surface sheet 11 side in the pulp 16 as shown in FIG. 6, and is used in a state of being uniformly mixed in the pulp 16 or on the back sheet 13 side. It can be spread on the surface, or can be layered and inserted in the center in the thickness direction. Alternatively, the water-absorbing polymer 17 may be partially arranged by means such as forming a sheet.
As the water-absorbing polymer, those usually used in the technical field can be appropriately used. For example, sodium polyacrylate, cross-linked sodium polyacrylate, (acrylic acid-vinyl alcohol) copolymer, (starch-acrylic acid) graft polymer, (isobutylene-maleic anhydride) copolymer and saponified product thereof, Examples include potassium polyacrylate and cesium polyacrylate. These water-absorbing polymers can be used alone or in combination of two or more. In particular, a sodium polyacrylate type is preferable from the viewpoint of urine retention and absorption rate.
The amount of the water-absorbing polymer used is an absorber (including the water-absorbing polymer, a deodorant described later, and the like, for example, the thin paper 18 of the pet excrement absorbent article 10 shown in FIG. 6 and the pet excrement of the present invention. The dry mass is preferably 1 to 50 parts by mass and more preferably 3 to 45 parts by mass with respect to 100 parts by mass of the dry mass of the part contained in the lower layer 15 of the topsheet 11 for absorbent articles). 5 to 40 parts by mass is particularly preferable.

Moreover, you may mix | blend fibers, such as a bulky pulp fiber which performed synthetic fiber, the crosslinking process, etc. with the absorber 12, and may improve the decompression | restoration property of the compression part at the time of liquid absorption.
For fibrous absorber blended fiber absorber, and amount thereof is preferably the basis weight is 30 to 500 g / ^{m 2,} more preferable to be ^{45~400g / m 2, 40~300g / m} 2 Is more preferable. If the basis weight is 30 g / m ² or more, sufficient liquid absorbency can be secured, and if it is 500 g / m ² or less, it can be easily folded and can be packed in various forms.

Moreover, it is preferable that the deodorizer 19 is mix | blended with the absorber 12. FIG. By blending a deodorant, the deodorizing property against bad odor caused by pet excrement becomes excellent.
As a deodorant, there is no elution of pigments even when it comes into contact with water caused by pet excrement, and there is no problem such as skin sensitization even when it comes into contact with pets. Use a color that does not spoil. As a deodorant preferably used, for example, natural wood having a deodorizing property can be mentioned. Examples of such wood include cypress, pine, cypress, cypress, Japanese cedar, Japanese cedar, Japanese larch, pine, Japanese cedar, Japanese cedar, Japanese cedar, Japanese cedar, Japanese cedar, Japanese cedar, Japanese cedar, Japanese cedar Examples thereof include conifers such as euglena, eucalyptus, camphor, sendan, manuka and the like. These woods can be used alone or in combination of two or more. Among these, cedar, pine, or cypress are preferred from the viewpoint of the ability of the pigment to hardly elute and the deodorizing power against urine, and cypress and / or hiba are particularly preferred.
These timbers are preferably used in the form of sawdust having a long side of 5 mm or less, specifically ground or compressed, or in the form of threads or ribbons, and are mixed with the absorbent body of a pet excreta absorbent article. Is preferred. In addition, since the wood sawdust has a low specific gravity, it is easier to stably produce the wood sawdust by mixing it with the pulp 16 than by dispersing it alone.

  The blending amount of the deodorant is preferably 0.5 to 30 parts by mass, more preferably 1.0 to 25 parts by mass, and 1.5 to 20 parts per 100 parts by mass of the dry mass of the absorber. A part by mass is particularly preferred. If the amount of the deodorant is 0.5 parts by mass or more, the deodorizing property can be sufficiently exhibited, and if it is 30 parts by mass or less, it is easy to manufacture.

By the way, as a conventional deodorant for pet excreta absorbent articles, fragrances and essential oils are often used. However, fragrances and essential oils are deodorized by being discolored or decomposed during storage. The effect was easy to reduce. In addition, depending on the type of essential oil, it may have skin sensitization, which may require consideration for pets.
However, as in the present invention, if the deodorant described above is used as the deodorant, in particular, a deodorant composed of hinoki and / or hiba, there is no problem even if it comes into contact with the pet. Moreover, since such a deodorizer is hard to discolor or decompose during storage, the deodorizing effect can be maintained.

The surface sheet for pet excreta absorbent articles of the present invention used for the above-explained top sheet, back sheet, and pet excrement absorptive article comprises two layers, an upper layer and a lower layer. By setting the Munsell hue to 2.5YR to 7.5GY to 10.0BG, it was possible to conceal the pet's urine trace. Moreover, since the pet's hematuria can be confirmed in this range of colors, the pet's health can be managed.
In addition, a white sheet with a plurality of apertures is used as the upper layer, making it possible to make urine stains less noticeable without impeding absorption of urine, providing a clean feeling and being usable for a long time It was possible to obtain pet excreta absorbent articles.
In addition, when the upper layer has a two-stage structure of an upper stage and a lower stage, and the upper stage has an aperture ratio higher than the aperture ratio of the lower stage, the pet's paw is reversed from the pet excreta absorbent article. It can prevent you from stepping on the urine directly, and it is hygienic.

[Pet waste-absorbing article]
As shown in FIGS. 1 and 6, the pet excreta absorbent article of the present invention is provided with the top sheet 11 and the back sheet 13 for the pet excreta absorbent article of the present invention described above, and between them. The absorbent body 12 is provided.
For example, the pet excreta absorbent article 10 shown in FIG. 1 can be manufactured as follows. That is, the back sheet 13, the absorbent body 12, and the lower layer 15 of the top sheet 11 for the pet excreta absorbent article of the present invention are laminated in this order from the bottom, and the edge of the back sheet is folded. The upper layer 14 of the top sheet 11 for the pet excreta absorbent article of the present invention obtained thereon is adhered to the periphery thereof using glue, hot-melt adhesive, heat fusion, etc. The excrement absorbent article 10 for use is shape | molded.

  For example, the pet excreta absorbent article 10 shown in FIG. 6 can be manufactured as follows. That is, the back sheet 13, the absorbent body 12 loaded on the thin paper 18, the lower layer 15 of the top sheet 11 for the pet excrement absorbent article of the present invention, and the pet excretion of the present invention obtained thereon. The upper layer 14 of the topsheet 11 for physical absorbent articles is laminated in this order from the bottom. Next, the surroundings are adhered using glue, hot-melt adhesive A, heat fusion, or the like, and the excreta absorbent article 10 for pets is formed.

Since the pet excreta absorbent article of the present invention described above has the surface sheet for the pet excreta absorbent article of the present invention, the pet urine trace is concealed and urine absorption is prevented. Without being noticeable, urine stains can be made inconspicuous, clean and can be used for a long time.
Further, when a specific deodorant is blended in the absorbent body of the pet excreta absorbent article, there is no problem even if it comes into contact with the pet, and the deodorizing effect can be maintained.

Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto.
Moreover, the measurement and evaluation of various physical properties in each example and comparative example are based on the following methods.

[Munsell hue]
The Munsell hue of each thin paper was measured using a hand-held simple spectral color difference meter NF333 (manufactured by Nippon Denshoku Co., Ltd.) with 10 thin papers stacked.

[Concealment of urine traces]
To each molded sample, 30 mL of human urine was dropped at one location, and after 6 hours, the difficulty of conspicuous urine traces as seen from the surface was visually determined by five panelists.
(Evaluation criteria)
4 points: not noticeable 3 points: hardly noticeable 2 points: less noticeable 1 point: noticeable 0 point: very noticeable (judgment criteria)
◎: Average score of 5 people is 4 or more ◎: Average score of 5 people is 3 or more and less than 4 points ○: Average score of 5 people is 2 or more and less than 3 points △: Average score of 5 people is 1 point Less than 2 points x: The average score of 5 people is less than 1 point.

[Reverse prevention]
From the position of 10 cm height of each molded sample, 30 mL of a 1% by mass sodium chloride aqueous solution was injected into each sample for 10 seconds using a 50 mL graduated cylinder.
After completion of the injection, 10 pieces of filter paper (manufactured by ADVANTEC, 5Aφ11 cm) whose mass was measured in advance were placed on the surface of the sample, and a load of 2 kg was applied to the range of 5 × 5 × πcm ² for 3 seconds.
Thereafter, the mass of the filter paper was measured again, and the increase in mass was defined as the reversal amount (g). This was performed 5 times, and the average values are shown in Tables 1 and 2.

[Appearance of unsanitary appearance due to dye elution]
To each of the molded samples, 30 mL of a 1% by mass sodium chloride aqueous solution was dropped at one location, and after 6 hours, the appearance of unsanitary appearance due to dye elution as seen from the surface was visually determined by five panelists.
(Evaluation criteria)
3 points: No dye elution 2 points: Dye elution is slight but almost inconspicuous 1 point: Dye elution exists and stands out 0 point: Dye elution exists and stands out (Judgment criteria)
None: All 5 have a score of 2 or more Yes: 1 or more has been judged as 1 or less

[Deodorization effect]
To each molded sample, 10 mL of dog urine was dropped at one location and left in an acrylic box (0.5 m ³ ) for 6 hours. did. The odor intensity was determined according to the following criteria according to the 6-step odor intensity display method, and the average value was obtained.
(Criteria)
5 points: intense odor 4 points: strong odor 3 points: odor that can be easily detected 2 points: weak odor that shows what smell it is 1 point: odor that can finally be detected 0 points: odorless

In the following examples and comparative examples, the following films were prepared as upper layers.
Perforated film (A):
As shown in FIG. 2 and FIG. 3, a white open film having a one-stage structure with polyethylene (basis weight 23 g / m ² ), open area ratio 36%, open hole density 100 holes / cm ² , and thickness 400 μm.
Perforated film (B):
As shown in FIG. 4 and FIG. 5, polyethylene (basis weight 23 g / m ² ), upper-stage aperture ratio 60%, aperture density 10 holes / cm ² , thickness 250 μm, lower-stage aperture ratio 37%, open A white apertured film having a two-stage structure having a pore density of 120 holes / cm ² and a thickness of 240 μm.
Perforated film (C):
A white-open film with a one-stage structure having a polyethylene (basis weight 23 g / m ² ), an opening ratio of 30%, an opening density of 230 holes / cm ² , and a thickness of 280 μm.

[Example 1]
The glue was thinly applied to the entire back surface of the upper layer of the apertured film (A) (350 mm × 450 mm). Next, the lower layer Munsell hue 4.9G thin paper (manufactured by Shimojima Co., Ltd., light green 2102505, 300 mm × 400 mm) was attached to the entire back surface of the apertured film (A) to prepare a top sheet.
The surface sheet was placed on a cotton-like pulp having a basis weight of 208 g / m ² to form a sample, and each evaluation was performed. The results are shown in Table 1.

[Example 2]
Samples were molded and evaluated in the same manner as in Example 1 except that the perforated film (B) (350 mm × 450 mm) was used as the upper layer. The results are shown in Table 1.

Example 3
Other than using Munsell Hue 4.1BG thin paper as a lower layer (made by Bonvialcon Co., Ltd., peeled off the sheet used for regular size (Lot.07.12.04), 300 mm x 400 mm) Were molded in the same manner as in Example 1 and evaluated. The results are shown in Table 1.

Example 4
Samples were molded and evaluated in the same manner as in Example 2 except that a thin paper with a Munsell hue of 5.1Y (manufactured by Shimojima Co., Ltd., yellow 21025518, 300 mm × 400 mm) was used as the lower layer. The results are shown in Table 1.

As shown in Table 1, the top sheet formed in Examples 1 to 4 has a white upper layer and a plurality of apertures, and the Munsell hue of the thin paper used for the lower layer satisfies the conditions. It was excellent in concealment. Among them, in Examples 2 and 4 using the aperture film (B) having a two-stage structure and a high aperture density, an effect of blurring urine traces and the like was also observed.
Furthermore, Example 2 and Example 4 in which the upper layer has a two-stage structure were less sanitary than urine and were more hygienic than the upper layer having a one-stage structure.

[Comparative Example 1]
Samples were molded and evaluated in the same manner as in Example 1 except that a thin paper having a Munsell hue of 3.3B (manufactured by Shimojima Co., Ltd., Blue 2102504, 300 mm × 400 mm) was used as the lower layer. The results are shown in Table 2.

[Comparative Example 2]
Example except using Munsell Hue 4.1PB thin paper (Unicharm Pet Care Co., Ltd., deo-sheet regular size (Lot. 862030221) used as a lower layer, peeled off, 300mm x 400mm) Samples were molded in the same manner as in No. 1 and evaluated. The results are shown in Table 2.

[Comparative Example 3]
A sample was molded in the same manner as in Example 1 except that a thin paper having a Munsell hue of 8.4R (manufactured by Shimojima Co., Ltd., orange 2102519, 300 mm × 400 mm) was used as the lower layer, and each evaluation was performed. The results are shown in Table 2.

[Comparative Example 4]
A sample was molded in the same manner as in Example 1 except that a thin paper with a Munsell hue 4.3R (manufactured by Shimojima Co., Ltd., Red 2102600, 300 mm × 400 mm) was used as the lower layer, and each evaluation was performed. The results are shown in Table 2.

[Comparative Example 5]
Example except using Munsell Hue 4.1PB thin paper (Unicharm Pet Care Co., Ltd., deo-sheet regular size (Lot. 862030221) used as a lower layer, peeled off, 300mm x 400mm) Samples were molded in the same manner as in No. 2 and evaluated. The results are shown in Table 2.

[Comparative Example 6]
Glue was thinly applied to the entire back surface of the perforated film (C) (350 mm × 450 mm) as the upper layer. Next, a thin paper with a lower Munsell hue of 3.3B (manufactured by Shimojima Co., Ltd., Blue 2102504, 300 mm × 400 mm) was applied to the entire back surface of the apertured film (C), and a surface sheet was prepared and used. Samples were molded and evaluated in the same manner as in Example 2. The results are shown in Table 2.

  As shown in Table 2, the top sheet formed in Comparative Examples 1 to 5 has a white upper layer and a plurality of apertures, but the Munsell hue of the thin paper used for the lower layer does not satisfy the conditions. The urine trace hiding property was not preferable. The top sheet formed in Comparative Example 6 had a white upper layer and a plurality of apertures, and the Munsell hue of the thin paper used for the lower layer did not satisfy the conditions, so the urine trace hiding property was not preferable. Moreover, since the upper layer was thin and the hole density was high, the amount of reversion was large.

[Reference Example 1]
Samples were molded and evaluated in the same manner as in Example 1 except that 1 g of cypress sawdust was mixed with cotton-like pulp. The results are shown in Table 3.

[Reference Example 2]
Samples were molded and evaluated in the same manner as in Example 2 except that 1 g of hiba sawdust was mixed with cotton-like pulp. The results are shown in Table 3.

[Reference Example 3]
Samples were molded and evaluated in the same manner as in Example 1 except that 1 g of green tea leaves was mixed with cotton-like pulp. The results are shown in Table 3.

[Reference Example 4]
Samples were molded and evaluated in the same manner as in Example 2 except that 1 g of black tea leaf was mixed with cotton-like pulp. The results are shown in Table 3.

[Reference Example 5]
Samples were molded and evaluated in the same manner as in Example 1 except that 1 g of ground coffee beans was mixed with cotton-like pulp. The results are shown in Table 3.

[Reference Example 6]
Samples were molded and evaluated in the same manner as in Example 1. The results are shown in Table 3.

  As shown in Table 3, the samples molded in Reference Examples 1 and 2 and 6 had a good deodorizing effect without imparting an unsanitary appearance due to the elution of the dye. On the other hand, the samples molded in Reference Examples 3 to 5 were difficult to satisfy both the appearance of unsanitary feeling and the deodorizing effect at the same time.

It is sectional drawing of an example of the excrement absorbent article for pets. It is a top view of an example of the upper layer of 1 step | paragraph structure. It is sectional drawing of an example of the upper layer of 1 step | paragraph structure. It is a top view of an example of the upper layer of a two-stage structure. It is sectional drawing of an example of the upper layer of a two-stage structure. It is sectional drawing of the other example of the excrement absorbent article for pets.

Explanation of symbols

  10: Pet excrement absorbent article, 11: Top sheet for pet excrement absorbent article, 12: Absorbent body, 13: Back sheet, 14: Upper layer, 15: Lower layer, 16: Pulp, 17: Absorbent Polymer, 18: thin paper, 19: deodorant, 20: 1 upper layer, 21: film, 22: hole, 30: upper layer, 31 upper, 31 upper, 32: lower, 33: hole.

Claims (4)

In a top sheet for a pet excreta absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided therebetween,
It consists of two layers, an upper layer and a lower layer, the upper layer is white, has a plurality of apertures, and the lower layer is colored with a Munsell hue of 2.5YR to 7.5GY to 10.0BG ,
The upper layer has a two-stage structure of an upper stage and a lower stage, and the upper area has a higher hole area ratio than the lower area, and the upper area has a hole density (hole / cm ² ) of the lower stage. A top sheet for a pet excreta absorbent article having a pore density (hole / cm ² ) lower than that . The upper stage has an aperture ratio of 50 to 99%, an aperture density of 1 to 25 holes / cm ² , and a thickness of 100 to 900 μm, and the lower stage has an aperture ratio of 32 to 50% and an aperture density of 50 to 250 holes / The top sheet for pet excreta absorbent articles according to claim 1 , wherein the top sheet is cm ² and has a thickness of 100 to 900 µm . The excrement absorbent article for pets which has the top sheet for pet excrement absorptive articles for pets according to claim 1 or 2 , the back sheet impermeable to liquid, and the absorber provided between them . The excreta absorbent article for pets according to claim 3, wherein the absorbent comprises one or more selected from cypress and hiba.

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