JP2018134017A - Manufacturing apparatus for excrement treatment sheet for pet and cover sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excrement treatment sheet for a pet, capable of increasing an absorption amount of excrement, and free from spoiling an external appearance by preventing leakage of a water absorbing polymer or pulp.SOLUTION: An excrement treatment sheet for a pet includes a sheet-like absorber 11, and a water permeable cover sheet 12 covering one surface of the absorber 11. The cover sheet 12 has a plurality of projections 12A whose tips each project to the absorber 11 in the thickness direction, and a plurality of openings 12B allowing the absorber 11 to absorb excrement. The opening 12B has a flat surface formed in a slit shape. A dimension N2 in the width direction of the opening 12B is smaller than an average grain size of a mixture body 11C of a water absorbing polymer or pulp so that leakage to the outside is hardly caused.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pet excrement disposal sheet and a production apparatus for a covering sheet.

Pet excrement processing sheets for processing excrement such as pet excreta are frequently used.
This pet excrement disposal sheet is required to absorb excrement quickly and to prevent the excrement from reversing even if the pet steps on the foot after excretion.
In order to satisfy such a demand, the excrement disposal sheet for pets includes an absorbent body having water absorption, and a sheet-like surface material having water permeability provided so as to cover one surface of the absorbent body. There is a conventional example in which a plurality of protrusions protruding in the thickness direction are formed on the material (Patent Document 1).

In the conventional example of Patent Document 1, circular openings are respectively formed at the tips of a plurality of protrusions, and excreta is absorbed by the absorber through these openings.
Here, the absorbent body has a configuration in which a water-absorbing polymer or pulp for absorbing excrement is housed in a paper housing body. The opening is formed by piercing a sheet with a protrusion such as a needle.

JP 2001-218535 A

In the conventional example of Patent Document 1, the opening formed at the tip of the protrusion is circular. When the opening is large, the water-absorbing polymer or pulp penetrates the paper-like storage body and leaks from the opening. The granular polymer or pulp in which the excrement is absorbed has a color of the excrement, so that the appearance of the sheet is impaired.
In order to solve this problem, it is conceivable to make the opening itself small. However, if the opening is too small, the amount of excrement per opening of the opening, that is, the amount of excretion absorbed by the absorber is small. Become. To increase the amount of excreted permeation, the number of openings may be increased. However, in order to form a large number of small openings on a sheet, a member that forms openings such as needles is made thin and a large number of needles are formed. Etc. must be densely packed, making opening work difficult.

  An object of the present invention is to provide an apparatus for producing a pet excreta treatment sheet and a covering sheet that can increase the amount of excreta absorbed and prevents the appearance of the water-absorbing polymer and pulp from being damaged. There is to do.

  The pet excrement disposal sheet of the present invention has a plurality of water-absorbing polymers and pulp, respectively, a sheet-like absorber that absorbs pet excrement, a water-permeable covering sheet that covers one surface of the absorber, The covering sheet includes a plurality of protrusions whose front ends protrude toward the absorber in the thickness direction, and a plurality of openings that allow the absorber to absorb excrement. And the opening is formed in a slit shape in which the length in one direction of the plane is longer than the length in the width direction orthogonal to the one direction.

In the present invention, when the pet discharges excrement on the covering sheet, the excrement is absorbed by the absorber through the opening of the covering sheet. Since the covering sheet is formed with a plurality of protrusions with the tip facing the absorber, these protrusions prevent the excrement from returning backward. By preventing the excrement from reversing, even if the pet steps on the excrement disposal sheet for pets, the leg is difficult to get dirty.
In the present invention, the opening is formed in a slit shape. The dimension in the width direction of the opening is set smaller than the average particle diameter of the water-absorbing polymer and the fiber length of the pulp. Usually, the average particle diameter of the water-absorbing polymer and the fiber length of the pulp often exceed 0.5 mm. The dimension in the width direction of the slit-shaped opening is 0.5 mm or less. This makes it difficult for most of the water-absorbing polymer and pulp to leak to the outside through the opening, and the appearance of the sheet can be kept good.
In addition, since the length of the opening is longer in the one direction than in the width direction, the area through which excrement per one opening can permeate can be increased compared to a circular opening having the same diameter as the width direction. . Therefore, it is possible to efficiently absorb the excreta with the absorber. Furthermore, since the number of openings can be reduced by forming the openings in the shape of slits, compared with the case of making a small circle, the members for forming the openings need not be densely packed. The part can be easily formed on the covering sheet.

In this invention, the said opening part is good also as a structure currently formed in the front-end | tip of the said protrusion part.
In this configuration, since the opening is formed at the tip of the protrusion, the opening is close to the absorber, and after the excrement accumulates in the internal space of the protrusion, the absorber absorbs quickly through the opening. Will be.

In the present invention, the opening may be formed between adjacent protrusions among the plurality of protrusions.
In this structure, since there exists a dimension corresponding to the protrusion length of a protrusion part between an opening part and an absorber, excrement becomes difficult to return outside through an opening part.

In this invention, the said coating sheet is good also as a structure formed from the nonwoven fabric which performed the hydrophilic treatment.
In this structure, since the nonwoven fabric which performed the hydrophilic process has water permeability, excrement, especially urine, permeate | transmits except an opening part, and becomes easy to absorb with an absorber.

In the present invention, the opening may have a configuration in which a ratio of the length in the one direction to the length in the width direction is 6: 1 to 3: 1.
With this configuration, the opening can be prevented from tearing, and the water-absorbing polymer and pulp are hardly leaked to the outside. That is, when the ratio of the length in one direction to the length in the width direction exceeds 6: 1, the opening becomes too long and the opening is torn along the longitudinal direction. When the ratio of the length in one direction to the length in the width direction is less than 3: 1, there is no difference between the one direction and the width direction compared to the case where the opening is circular, and many of the water-absorbing polymers and pulps There is a risk of leaking outside through the opening.

The apparatus for producing a coated sheet of the present invention is an apparatus for producing a water-permeable coated sheet that covers a surface of a sheet-shaped absorbent body that has a plurality of water-absorbing polymers and pulp and absorbs pet excreta, A projecting part forming part that forms a plurality of projecting parts projecting in one of the thickness directions of the sheet, and an opening forming part that forms a plurality of openings allowing the absorbent to absorb excrement, The opening forming portion is characterized in that the opening is formed in a slit shape having a length in one direction longer than a width direction orthogonal to the one direction on the plane of the sheet.
In this invention, a protrusion part and a slit-shaped opening part can be simultaneously formed in a sheet | seat by a protrusion part formation part and an opening part formation part, and a coating sheet is manufactured easily.

In this invention, it is good also as a structure provided with the drum in which the said protrusion part formation part and the said opening part formation part were each formed in the surrounding surface, and the sheet supply roll which supplies a sheet | seat to the said drum.
In this configuration, the sheet drawn from the sheet supply roll is sent to the rotating drum, and the sheet is brought into contact with the peripheral surface of the drum, so that the sheet simultaneously hits the protruding portion forming portion and the opening forming portion, A coated sheet is produced. Therefore, the covering sheet can be efficiently manufactured by rotating the drum.

The perspective view which fractured | ruptured some pet excrement disposal sheets concerning a first embodiment of the present invention. Sectional drawing which shows the outline of the excrement disposal sheet | seat for pets. (A) is a partial top view of a covering sheet, (B) is sectional drawing which follows the BB line of (A). Schematic which shows the manufacturing apparatus of a covering sheet. The principal part of the state which pinched | interposed the sheet | seat with a pair of drum is expanded and shown, (A) is sectional drawing along the circumferential direction of the drum, (B) is sectional drawing along the axial direction of the drum. The figure which shows the excrement disposal sheet | seat for pets concerning 2nd embodiment of this invention, and is equivalent to FIG. The figure which expands and shows the principal part of the state which pinched | interposed the sheet | seat with a pair of drum, and is a figure corresponding to FIG.

[First embodiment]
A first embodiment of the present invention will be described with reference to the drawings.
1 to 3 show a pet excrement disposal sheet according to the first embodiment.
[Pet waste disposal sheet]
1 and 2 showing the overall configuration, a pet excrement disposal sheet 1 includes a base sheet 10, a sheet-like absorber 11 that is disposed on the base sheet 10 and absorbs pet excrement, and an absorber. 11 and a covering sheet 12 covering one surface.

The base sheet 10 is a liquid-impermeable sheet having a peripheral edge portion 10 </ b> A for joining with the covering sheet 12.
As a material which comprises the base sheet 10, an organic synthetic resin film and an organic synthetic resin sheet can be used, for example, Specifically, a polyethylene (PE) film, a polypropylene (PP) film, an unsaturated polyester film, polyethylene A terephthalate (PET) film or the like can be used. Moreover, it is not restricted to these organic synthetic resin films and sheets, You may use the nonwoven fabric which gave water-repellent treatment, the paper which gave water-repellent treatment, etc.

The absorber 11 is not particularly limited as long as it can absorb moisture in excrement such as urine and feces. For example, the absorber body 11A made of pulverized pulp, a water absorbent polymer, and the like, and the absorber body And a package 11B sandwiching 11A.
The pulverized pulp and the absorbent polymer are a mixture 11C, and the fiber length of the pulverized pulp and the average particle diameter L of the water-absorbing polymer in the mixture 11C are often larger than 0.5 mm. In the following description, the fiber length of the crushed pulp and the average particle diameter L of the water-absorbing polymer are simply referred to as the average particle diameter L of the mixture 11C. In this embodiment, you may add the deodorizer and fragrance | flavor for eliminating the smell of excrement to crushing pulp and a water absorbing polymer. The fragrance includes a fragrance that scents when exposed to moisture. In FIG. 2, only the upper part of the mixture 11 </ b> C is illustrated, but actually, a large number of the mixture 11 </ b> C including the lower part is uniformly stored in the package 11 </ b> B.

  The package 11B is composed of two tissue papers 11B1 and 11B2 for sandwiching the absorbent body 11A. Of these, the paper 11B1 facing the covering sheet 12 is colored to conceal the color of excrement. (For example, blue, green, yellow-green, purple, etc.) is comprised, and the other paper 11B2 is comprised from the white tissue. The paper 11B1 may be white instead of colored. Further, the package 11B may be made of a non-woven fabric instead of paper such as tissue. Specific examples of the water-absorbing polymer include copolymers of vinyl esters and ethylenically unsaturated carboxylic acids or derivatives thereof, copolymers of starch and acrylic acid, copolymers of vinyl alcohol and acrylic acid, polyacrylonitrile. A partially hydrolyzed product, a polyethylene glycol cross-linked product, and the like can be used. Furthermore, you may add the deodorizer and fragrance | flavor for eliminating the smell of excrement in the package 11B.

The covering sheet 12 is a water-permeable sheet that covers one surface of the absorbent body 11 and is formed of a nonwoven fabric in the present embodiment. Here, as a nonwoven fabric, it forms from synthetic resins, such as a polypropylene (PP), a polyethylene terephthalate (PET), and polyethylene (PE). In order to easily induce moisture to the absorbent body 11, a hydrophilic treatment is applied to the covering sheet 12. The hydrophilic treatment is performed, for example, by kneading a hydrophilic agent into the dough.
The covering sheet 12 is formed in a planar rectangular shape, and its four peripheral edges are joined to the peripheral edge 10A of the base sheet 10 and the package 11B by hot melt or the like.

A specific structure of the covering sheet 12 is shown in FIGS. 3A shows a plane of the covering sheet 12, and FIG. 3B shows a cross section of the covering sheet 12 along the line BB in FIG. 3A. In FIG. 3 (B), the left side of the covering sheet 12 is the inside, the absorber 11 is opposed, and the right side is the outside.
3 (A) and 3 (B), the covering sheet 12 has a plurality of projecting portions 12A that protrude in the thickness direction toward the absorbent body 11, and allow the absorbent body 11 to absorb excrement. And a plurality of openings 12B to be formed, and concave portions (not shown) formed in advance as a nonwoven fabric. The protrusion 12A and the recess are each formed as an emboss. In FIG. 2, the opening 12B is not shown, and in FIG. 1, the protrusion 12A and the opening 12B are not shown.

The planar shape of the projecting portion 12A is a rhombus whose length in one direction (vertical direction in FIG. 3A) is longer than the length in the width direction orthogonal to the one direction (horizontal direction in FIG. 3A). Or it is elliptical. For example, the length M1 in one direction of the protrusion 12A is, for example, 2.0 mm to 4.0 mm, preferably 3.0 mm, and the length M2 in the width direction is, for example, 1.5 mm to 3. 0 mm or less, preferably 2.0 mm.
The protrusions 12A are arranged in a grid pattern. The pitch P1 in one direction among the adjacent protrusions 12A is, for example, 3.0 mm or more and 6.0 mm or less, preferably 4.5 mm, and the pitch P2 in the width direction is, for example, 2.0 mm or more and 5.0 mm. Hereinafter, it is preferably 3.5 mm.
The dimension M3 in the protruding direction of the protruding portion 12A is, for example, 1.0 mm or more and 3.0 mm or less, preferably 2.0 mm. A portion of the protruding portion 12A opposite to the portion facing the absorber 11 is a recess for storing excrement. The depth R of the dent is 0.2 mm or more and 2.0 mm or less, preferably 0.8 mm. In addition, since a dent has a larger surface area than a flat surface, the water absorption speed is faster than that of a flat surface.

In the present embodiment, the plurality of openings 12B are respectively formed at the tips of the protrusions 12A. The center of the opening 12B on the plane coincides with the center of the projection 12A on the plane.
The opening 12B has a length N2 in a width direction (left and right direction in FIG. 3A) in which a length N1 in one direction (vertical direction in FIG. 3A) is orthogonal to the one direction on the plane. It is formed in a longer slit shape.
The ratio of the length N1 in one direction to the length N2 in the width direction is 6: 1 to 3: 1. The length N1 in one direction is, for example, 0.3 mm or more and 6.0 mm or less, preferably 1.5 mm, and the length N2 in the width direction is, for example, 0.1 mm or more and 1.0 mm or less, preferably 0.5 mm.
The number of openings 12B is appropriately set depending on the area, thickness, and other conditions of the covering sheet 12, and is, for example, 100,000 or more and 150,000 or less, preferably 125,000 per 1 m ² .

[Coated sheet manufacturing equipment]
A covering sheet manufacturing apparatus will be described.
The pet excrement disposal sheet manufacturing apparatus manufactures a base sheet manufacturing apparatus (not shown) for manufacturing the base sheet 10, an absorbent body manufacturing apparatus (not shown) for manufacturing the absorbent body 11, and a covering sheet 12. And a sealing device (not shown) for joining the covering sheet 12 to the base sheet 10 on which the absorbent body 11 is arranged.
The covering sheet manufacturing apparatus 50 of this embodiment is demonstrated based on FIG.

FIG. 4 shows the overall configuration of the covering sheet manufacturing apparatus 50.
In FIG. 4, the coated sheet manufacturing apparatus 50 processes the sheet supply roll 51 around which the non-woven sheet 120 that is the material of the coated sheet 12 is wound, and the sheet 120 drawn out from the sheet supply roll 51 to process the coated sheet 12. And a winding unit 53 that winds up the covering sheet 12 processed by the processing unit 52.
The sheet supply roll 51 is rotatably attached to the base 510. The base 510 is provided with a pressure adjusting unit 511 that adjusts the tension of the sheet 120 to be sent to the processing unit 52.
The processing section 52 includes a pair of drums 521 and 522 that form the covering sheet 12 with the sheet 120 sandwiched between the peripheral surfaces thereof.
The winding unit 53 includes a winding roll 530 that winds up the covering sheet 12, and a feed roll group 531 that sends the covering sheet 12 from the processing unit 52 to the winding roll 530. The roll group 531 is composed of a plurality of rolls.

5A and 5B show a state in which the sheet 120 is sandwiched between the pair of drums 521 and 522. FIG.
FIG. 5A shows a cross section of the main part along the circumferential direction of the pair of drums 521 and 522, and FIG. 5B shows a cross section of the main part along the axial direction of the pair of drums 521 and 522. ing.
As shown in FIGS. 5A and 5B, the pair of drums 521 and 522 sandwich the sheet 120 and form the protruding portion 12A and the opening 12B at the same time.
On the peripheral surface of the drum 521, a projecting portion forming portion 54A that forms a plurality of projecting portions 12A that project in one direction in the thickness direction of the sheet 120, and an opening that is integrally formed at the tip of these projecting portion forming portions 54A, respectively. And an opening forming portion 54B for forming the portion 12B.

The protruding portion forming portion 54A has a shape corresponding to the protruding portion 12A, and the length along the circumferential direction of the drum 521 is longer than the length along the axial direction (direction perpendicular to the circumferential direction).
The opening forming part 54B penetrates the sheet 120 and forms the slit-shaped opening 12B.
The opening forming portion 54B has a length in one direction (axial direction of the drum 521) longer than a length in the width direction (circumferential direction of the drum 521) perpendicular to the one direction.
The tip of the opening forming portion 54B may be formed in a tapered shape so that the sheet 120 can be easily penetrated.

The drum 522 has a concave portion 55 formed on the peripheral surface thereof corresponding to the protruding portion forming portion 54A and the opening forming portion 54B.
The recessed portion 55 stores the inclined portion 55A that forms the protruding portion 12A by sandwiching the sheet 120 with the protruding portion forming portion 54A and the front end portion of the opening forming portion 54B that penetrates the sheet 120 without interfering with each other. Part 55B.
In order to easily form the protruding portion 12A and the opening 12B in the sheet 120, at least one of the drum 521 and the drum 522 may be heated.

In order to manufacture the cover sheet 12 with the cover sheet manufacturing apparatus 50 having such a configuration, first, a non-woven sheet 120 in which a plurality of embossed recesses are formed is sent from the sheet supply roll 51 to the processing section 52.
In the processing unit 52, the drum 521 and the drum 522 are rotating. When the sheet 120 is fed between the drum 521 and the drum 522, the sheet 120 is sandwiched between the protruding portion forming portion 54A of the drum 521 and the inclined portion 55A of the drum 522, so that the embossed protrusion The portion 12A is formed in the sheet 120, and the opening forming portion 54B penetrates the sheet 120 through the sheet 120 located at the tip of the protrusion 12A, so that the slit-like opening 12B is formed at the tip of the protrusion 12A. Is done. The longitudinal direction of the opening 12B is the feeding direction of the sheet 120.
In the processing portion 52, the protruding portion 12 </ b> A and the opening portion 12 </ b> B are simultaneously formed on the sheet 120 to manufacture the covering sheet 12, and the covering sheet 12 is wound around the winding roll 530 of the winding portion 53.

In order to manufacture the excrement disposal sheet 1 for pets using the coating sheet 12 manufactured in this way, the absorbent bodies 11 manufactured separately are arranged one by one on the band-shaped base sheet 10, The covering sheet 12 wound up by the winding roll 530 is disposed on the base sheet 10 on which the absorber 11 is disposed, and the covering sheet 12 and the base sheet 10 around the absorber 11 are joined by hot melt. To do. At this time, the covering sheet 12 is arranged so that the tip of the protruding portion 12 </ b> A faces the absorber 11.
And if the predetermined position of the base sheet 10 and the covering sheet 12 is cut | disconnected, the individual excrement disposal sheet | seat 1 for pets will be manufactured.

[Effect of the first embodiment]
(1) The pet excrement disposal sheet 1 includes a sheet-like absorber 11 and a water-permeable covering sheet 12 that covers one surface of the absorber 11, and the covering sheet 12 is in the thickness direction thereof. The absorbent body 11 has a plurality of protrusions 12A whose front ends protrude toward the absorbent body 11 and a plurality of openings 12B that allow the absorbent body 11 to absorb excrement. Therefore, even if the pet steps on the pet excrement disposal sheet 1, the excrement is prevented from returning to the back, and the pet's leg is not easily soiled. Moreover, since the opening 12B is formed in a planar slit shape, the dimension N2 in the width direction is smaller than the average particle diameter L of the mixture 11C of the absorbent polymer or pulp of the absorber 11, and the mixture 11C becomes the opening 12B. Rarely leaks to the outside. That is, when the pet steps or scratches the pet excrement disposal sheet 1, the mixture 11 </ b> C passes through the packaging body 11 </ b> B made of tissue or the like and hits the opening 12 </ b> B of the covering sheet 12. Since the average particle diameter L of the mixture 11C is often larger than the dimension N2, the mixture 11C rarely leaks outside through the opening 12B. Therefore, the appearance can be kept good and the number of the openings 12B can be reduced as compared with the case where the openings are made into a small circle, so that the openings 12B can be easily formed on the covering sheet 12.

(2) Since the opening 12B is formed at the tip of the protrusion 12A, the opening 12B comes close to the absorber 11. Therefore, since excrement accumulates in the internal space of the protrusion 12A and is immediately absorbed by the absorber 11 from the opening 12B, the excrement can be efficiently absorbed by the absorber 11 through the opening 12B. And since there is little excrement remaining in the area | region in which the protrusion part 12A of the coating sheet 12 is not formed, the said area | region will dry immediately and a pet's leg is hard to become dirty.

(3) The covering sheet 12 is formed from a nonwoven fabric subjected to a hydrophilic treatment. Since the nonwoven fabric subjected to the hydrophilic treatment has water permeability, excrement, in particular, urine can be transmitted through other than the opening, and absorption of excrement by the absorber 11 is promoted.

(4) Since the ratio of the length in one direction to the length in the width direction of the opening 12B is 6: 1 to 3: 1, the opening 12B is too long and the opening 12B is along the longitudinal direction. The inconvenience of tearing can be avoided, and the water-absorbing polymer and pulp are less likely to leak outside through the opening 12B.

(5) As an apparatus for manufacturing a covering sheet, a protruding portion forming portion 54A that forms a plurality of protruding portions 12A that protrude in one of the thickness directions of the sheet 120, and an opening portion that forms a plurality of opening portions 12B in a slit shape, respectively. Since the forming portion 54B is provided, the slit-shaped opening 12B can be easily formed.

(6) Since the projecting portion forming portion 54A and the opening portion forming portion 54B include the drums 521 and 522 formed on the peripheral surfaces, respectively, and the sheet supply roll 51 that supplies the sheet 120 to the drums 521 and 522. Then, the sheet 120 drawn from the sheet supply roll 51 is sent to the rotating drums 521 and 522, and the sheet 120 is brought into contact with the peripheral surfaces of the drums 521 and 522, so that the sheet 120 is opened with the protruding portion forming portion 54A. The covering sheet 12 can be efficiently manufactured by hitting the portion forming portion 54B at the same time.

(7) Since the direction in which the sheet 120 is fed coincides with one direction (longitudinal direction) of the opening 12B, the opening 12B can be easily formed by the opening forming part 54B. That is, when forming the protruding portion 12A and the opening 12B, the sheet 120 is pulled in the feeding direction, but by matching one direction of the opening 12B, the opening 12B is torn during the production of the covering sheet 12. Can be prevented.

[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIGS. 6 and 7 of the drawings. The second embodiment is different from the first embodiment in the position where the opening is formed and the configuration of the opening forming portion, and the other configurations are the same as those in the first embodiment. In description of 2nd embodiment, the same component as 1st embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.
[Pet waste disposal sheet]
The schematic configuration of the pet excrement disposal sheet 2 according to the second embodiment includes a base sheet 10 and a sheet-like sheet that is disposed on the base sheet 10 and absorbs pet excrement as shown in FIGS. The absorber 11 and the coating sheet 22 which covers the absorber 11 are provided.

The covering sheet 22 is made of a nonwoven fabric as in the first embodiment, and is a water-permeable sheet that covers one surface of the absorbent body 11.
A specific structure of the covering sheet 22 is shown in FIGS. FIG. 6A shows a plan view of the covering sheet 22, and FIG. 6B shows a cross section of the covering sheet 22 along the line BB in FIG. 6A. In FIG. 6B, the left side of the covering sheet 22 is the inside, the absorber 11 is opposed, and the right side is the outside.

6 (A) and 6 (B), the covering sheet 22 has a plurality of protrusions 22A and a plurality of openings 22B that allow the absorbent body 11 to absorb excrement.
In the present embodiment, unlike the protrusion 12A of the first embodiment, the protrusion 22A has no opening at the tip.
The protrusions 22A and the openings 22B are alternately arranged in one direction (the vertical direction in FIG. 6A) and the width direction (the horizontal direction in FIG. 6A).
The length M1 in one direction of the protrusion 22A is, for example, 2 mm to 5 mm, preferably 3 mm, and the length M2 in the width direction is, for example, 1.0 mm to 4.0 mm, preferably 2.0 mm. It is.

The protruding portions 22A are arranged in a lattice shape. The pitch P1 in one direction among the adjacent protrusions 22A is, for example, 5.0 mm or more and 9.0 mm or less, preferably 7.0 mm, and the pitch P2 in the width direction is, for example, 3.0 mm or more and 6.0 mm. Hereinafter, it is preferably 4.5 mm.
The dimension M3 in the protruding direction of the protruding portion 22A is, for example, 1.0 mm or more and 3.0 mm or less, preferably 2.0 mm. A recess is formed on the surface of the protruding portion 22A opposite to the surface facing the absorber 11. The depth R of the dent is 0.2 mm or more and 2.0 mm or less, preferably 0.8 mm.

The opening 22B is formed in the plane of the slit 22 in such a manner that the length N1 in one direction is longer than the length N2 in the width direction.
The ratio of the length N1 in one direction to the length N2 in the width direction is 6: 1 to 3: 1. The length N1 in one direction is, for example, 0.9 mm or more and 6.0 mm or less, preferably 2.0 mm, and the length N2 in the width direction is, for example, 0.1 mm or more and 1.0 mm or less, preferably 0.5 mm.
The number of the openings 22B is appropriately set depending on the area, thickness, and other conditions of the covering sheet 12, and is, for example, 30,000 to 90,000, preferably 60,000 per 1 m ² .

[Coated sheet manufacturing equipment]
The basic configuration of the pet excrement disposal sheet manufacturing apparatus is the same as that of the first embodiment, and the configuration of the processing unit 52 in the covering sheet manufacturing apparatus is different from that of the first embodiment.
The processing portion 52 includes a pair of drums 523 and 524 that simultaneously form the protruding portion 22A and the opening 22B with the sheet 120 sandwiched between the peripheral surfaces thereof.
7A is a cross-sectional view along the circumferential direction of the drums 523 and 524, and FIG. 7B is a cross-sectional view along the axial direction of the drums 523 and 524.
As shown in FIGS. 7A and 7B, the peripheral surface of the drum 523 has a protruding portion forming portion 54C that forms a plurality of protruding portions 22A that protrude in one of the thickness directions of the sheet 120, and a protruding portion formation. And a recessed portion 54D formed adjacent to the portion 54C.

The protruding portion forming portion 54C has a shape corresponding to the protruding portion 22A, and the length along the axial direction of the drum 523 is longer than the length along the circumferential direction.
The peripheral surface of the drum 524 is provided with a concave portion 57A corresponding to the protruding portion forming portion 54C and an opening portion forming portion 57B that forms the opening portion 22B. The recessed portion 57A has a shape corresponding to the protruding portion forming portion 54C, and the protruding portion 22A is formed by sandwiching the sheet 120 together with the protruding portion forming portion 54C. The tip of the opening forming portion 57B is accommodated without colliding with the recess 54D.
The opening forming portion 57B is formed in a thin plate shape, and the front end surface of the opening forming portion 57B is the length in the width direction (circumferential direction of the drum 523) in which the length in one direction (axial direction of the drum 523) is orthogonal to the one direction. Longer than that.

  The method of manufacturing the covering sheet 12 by the covering sheet manufacturing apparatus 50 having such a configuration is the same as that of the first embodiment. That is, when the sheet 120 is sent between the rotating drums 523 and 524, the sheet 120 has a protruding portion 22A formed by the protruding portion forming portion 54C of the drum 523 and the recessed portion 57A of the drum 524, and And the opening part 22B is formed because the opening part formation part 57B of the drum 524 penetrates. Also in the present embodiment, the opening 22B is formed in a slit shape, and the longitudinal direction thereof is the feeding direction of the sheet 120.

[Effects of Second Embodiment]
In 2nd embodiment, there can exist an effect similar to (1) (3)-(7) of 1st embodiment.

[Modification]
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in each said embodiment, although the coating sheets 12 and 22 were formed from the nonwoven fabric, in this invention, it is not limited to a nonwoven fabric, For example, you may form from a synthetic resin or paper film.

Furthermore, the drums 521, 522, 523, and 524 are used to form the protrusions 12 A and 22 A and the openings 12 B and 22 B. In the present invention, the protrusions are formed on the plate member that is disposed with the sheet 120 interposed therebetween. 54A and 54C and the opening formation parts 54B and 57B may be provided.
Even if the drums 521, 522, 523, and 524 are used, it is not necessary to make the flow direction of the sheet 120 coincide with the longitudinal direction of the openings 12B and 22B.

  DESCRIPTION OF SYMBOLS 1, 2 ... Pet excrement disposal sheet, 11 ... Absorber, 11C ... Mixture (water-absorbing polymer and pulp), 12 ... Cover sheet, 120 ... Sheet, 12A, 22A ... Projection, 12B, 22B ... Opening 50 ... Coated sheet manufacturing apparatus, 51 ... Sheet supply roll, 521, 522, 523, 524 ... Drum, 54A, 54C ... Projection forming part, 54B, 57B ... Opening forming part

Claims (7)

A sheet-like absorber each having a plurality of water-absorbing polymers and pulp and absorbing pet excreta, and a water-permeable covering sheet covering one surface of the absorber,
The covering sheet has a plurality of protrusions whose front ends protrude toward the absorber in the thickness direction, and a plurality of openings that allow the absorber to absorb excrement,
The excrement disposal sheet for pets, wherein the opening is formed in a slit shape in which the length in one direction of the plane is longer than the length in the width direction orthogonal to the one direction. In the pet excrement disposal sheet according to claim 1,
The pet excrement disposal sheet, wherein the opening is formed at a tip of the protrusion. In the pet excrement disposal sheet according to claim 1,
The pet excrement disposal sheet, wherein the opening is formed between adjacent protrusions of the plurality of protrusions. In the excrement disposal sheet for pets according to any one of claims 1 to 3,
The cover sheet is formed from a nonwoven fabric subjected to a hydrophilic treatment. In the pet excrement disposal sheet according to any one of claims 1 to 4,
The pet excrement disposal sheet, wherein the opening has a ratio of the length in the one direction to the length in the width direction of 6: 1 to 3: 1. An apparatus for producing a water-permeable covering sheet that covers one surface of a sheet-like absorbent body each having a plurality of water-absorbing polymers and pulp and absorbing pet excreta,
A projecting part forming part for forming a plurality of projecting parts projecting in one of the thickness direction of the sheet, and an opening forming part for forming a plurality of openings allowing the absorber to absorb excrement,
The said opening part formation part forms the said opening part in the slit shape whose length of one direction is longer than the width direction orthogonal to the said one direction on the plane of the said sheet | seat. The manufacturing apparatus of the covering sheet characterized by the above-mentioned. In the manufacturing apparatus of the coating sheet described in Claim 6,
A drum in which the protruding portion forming portion and the opening forming portion are each formed on a peripheral surface;
And a sheet supply roll for supplying the sheet to the drum.

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