JP2972945B2 - Pet excrement disposal material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pet excrement disposal material. More specifically, the present invention relates to a novel treatment material that can easily and efficiently treat excrement of pets such as cats and dogs.

[0002]

2. Description of the Related Art Conventionally, pet excrement disposal materials include:
Wet granulation of a mixture of inorganic powder such as zeolite particles and water-absorbent resin and water at a specific ratio, followed by drying (JP-A-01-108927), or paper waste, water-absorbent resin and water-soluble inorganic Wet granulation of a mixture consisting of salts,
Then, a dried product (JP-A-59-25629) is known.

[0003]

However, as described above, a mixture obtained by mixing and granulating an inorganic powder or a paper-making residue with a water-absorbent resin and water and then drying the granules has a good granulation property, but the granules are not dried during drying. In addition, the water-absorbing gel of the water-absorbing resin serves as a binder to fix the inorganic powders and paper scum particles more than necessary, so that the granulated material has a low urine absorption rate. Since the absorption rate is low, a large amount of granulated material is required to absorb urine released in large amounts in a short time, and there is a problem that the amount of waste is increased and uneconomical.

[0004]

DISCLOSURE OF THE INVENTION In view of the above problems, the present inventors have conducted intensive studies to find a novel pet excrement disposal material which has a high absorption rate and can absorb urine in a small amount. The invention has been reached. That is, the present invention is a pet excrement disposal material obtained by dry-press-molding a mixture comprising an inorganic powder (A), a powder of a water-absorbent resin (B) and, if necessary, a binder (C).

In the present invention, as the inorganic powder (A), for example, bentonite, kaolin, silica sand, diatomaceous earth,
Examples include calcium carbonate, magnesium carbonate, clay, zeolite, silica gel, alumina, clay, perlite, and mixtures of two or more thereof. Of these, preferred are bentonite and calcium carbonate, and particularly preferred is calcium carbonate. (A)
The average particle size is usually 30-250mesh, preferably 35-200mesh
It is. When the particle size is less than 30 mesh, when the roll-type pressure molding is performed, the briquette rolls are severely worn, and the pressure fluctuation during molding is large, and the yield of the molded product is reduced. On the other hand, if it exceeds 250 mesh, air is trapped during molding, and the molded product is easily broken, and the yield is also undesirably reduced.

In the present invention, as the water-absorbing resin (B), for example, starch or cellulose (a) and a water-soluble monomer containing a carboxyl group and / or a sulfonic acid group and / or become water-soluble by hydrolysis. Monomer
A water-absorbent resin obtained by polymerizing (b) and the crosslinking agent (c) as essential components and performing hydrolysis as necessary is mentioned. Used in the production of the water-absorbing resin exemplified above (a), details of (b) and (c), (a), the proportion of (b) and (c), the production method and specific examples of the water-absorbing resin are JP 52-25886
No.53-46199, No.53-46200 and No.53-46200
It is described in JP-A-55-21041.

Examples of (B) other than those exemplified above include those obtained by polymerizing (a) and (b) (hydrolyzate of starch-acrylonitrile graft polymer, cellulose-
Hydrolyzate of acrylonitrile graft polymer);
a crosslinked product of (a) (such as a crosslinked product of carboxymethyl cellulose); a copolymer of (b) and (c) (a partially hydrolyzed crosslinked polyacrylamide, a crosslinked acrylic acid-acrylamide copolymer, Sulfonated polystyrene, saponified vinyl ester-unsaturated carboxylic acid copolymer described in JP-A-52-14689 and JP-A-52-27455, crosslinked polyacrylate, crosslinked acrylic acid Acrylic acid ester copolymer, crosslinked isobutylene-maleic anhydride copolymer, and crosslinked carboxylic acid-modified polyvinyl alcohol); and a polymer (b) having self-crosslinking property (self-crosslinking polyacrylic acid) Salt and the like). Further, (B) exemplified above may be used in combination of two or more kinds.

[0008] Among these, preferred are those exemplified above as partial hydrolysates of cross-linked polyacrylamide, cross-linked acrylic acid-acrylamide copolymer, cross-linked polyacrylic acid (salt), cross-linked Acrylic acid-acrylic ester copolymer, cross-linked isobutylene-maleic anhydride copolymer, and cross-linked carboxylic acid-modified polyvinyl alcohol.

The above (B) has a water absorbing performance of at least 50 ml / g, preferably 100 to 1,000 ml / g, with respect to pure water. The shape of the water-absorbent resin is preferably powdery, the particle size is usually 840μm or less, preferably 200μm
m or less.

In the present invention, a binder (C) can be used if necessary. (C) includes natural polymers, synthetic resins, natural and synthetic rubbers, and the like.
Natural polymers include starch, carboxymethylcellulose, methylcellulose, ethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose,
Examples include sodium alginate, guar gum, xanthan gum, bean gum, carrageenan, gluten and the like. Examples of the synthetic resin include an acrylic resin, a polyurethane resin, an unsaturated polyester resin, a polyamide resin, and an ethylene copolymer resin. Examples of natural and synthetic rubbers include natural rubber, acrylic rubber, butyl rubber, polyisobutylene rubber, ethylene / propylene rubber, chloroprene rubber, and the like. These are each alone,
Alternatively, two or more kinds can be used in combination. Preferred among these are synthetic rubber binders.

The weight ratio of the powders (A) and (B) in the present invention can vary depending on the type of (A), the type of (B), the rate of water absorption of the excrement disposal material, and is usually 99: 1. ~ 55: 4
5, preferably 95: 5 to 70:30. If (B) is less than 1, the water absorption capacity is insufficient, and if it exceeds 45, the water absorption capacity does not improve so much, which is not preferable from an economic viewpoint.

The amount of the binder (C) optionally used in the present invention is usually 0 to 30% by weight, preferably 0.5 to 15% by weight, based on the total weight of the powders (A) and (B).

As a method for producing the excrement disposal material of the present invention, for example, the above-mentioned (A) and (B) powders and (C) if necessary are mixed with stirring and then dry-pressed, and the obtained press-formed product is obtained. A method of cutting and pulverizing into an appropriate size, a method of dry-press molding again after dusting the surface of the obtained cut and pulverized product with a water-absorbent resin and a binder as necessary, and cutting and pulverizing. Can be

As a method of dry-press-molding the mixture consisting of the powders (A) and (B) and, if necessary, (C), the mixture is dry-press-molded into pellets in a mold having an appropriate shape and size. Method, or once in sheet form,
After the dry pressure molding into a rod shape or a block shape, a method of cutting or pulverizing to an appropriate size may be mentioned. In the above, pressurization is usually performed at normal temperature, but heating (for example, 30 to
(300 ℃). The pressure at the time of pressure molding can be appropriately selected according to the type, particle size, properties, etc. of the base powder, but is usually 1 to 3000 kg / cm ² , preferably 10 to 3000 kg / cm ² .
20002000 kg / cm ² . Pressure molding is performed by a roll-type pressure molding machine (such as a briquette machine), a piston-type pressure molding machine,
It can be performed using a screw-type pressure molding machine, a perforated plate extrusion molding machine (such as a disk pelleter), or the like.
Among the above-mentioned dry press machines, a roll press machine and / or a perforated plate extruder are preferred.

The shape of the obtained press-formed product may be arbitrary,
For example, various shapes such as a spherical shape, a cylindrical shape, a plate shape, a rock shape, a rectangular parallelepiped shape, a conical shape, a pyramidal shape, and a rod shape are exemplified. The size is 0.1 to 20 mm, preferably 0.5 to 10 mm.

Further, the pet excrement disposal material of the present invention includes:
If required, deodorants, fragrances, fungicides, fungicides, preservatives, anti-blocking agents, surfactants, pets like target cats, such as matatabi for cats, fibrous materials (cotton, sawdust , Straw, grass charcoal, rayon, pulp, recycled pulp, waste pulp, etc.). These chemicals need only be present in the pet excrement disposal material of the present invention, and may be added to the inorganic powder and / or the water-absorbent resin powder in advance, or before or after the dry pressing step. It may be added. Further, the (A), (B) powder or (C) in the present invention may contain a small amount of water that does not require a drying operation after molding.

[0017]

EXAMPLES The present invention will be further described with reference to examples below, but the present invention is not limited to these examples.

Example 1 Calcium carbonate "KD-1" (particle size 35-70 mesh, manufactured by Dowa Calfine Co., Ltd.) and starch-grafted fine powdery water-absorbent resin "Sunwet IM-1000MPS" [Sanyo Chemical Industry Co., Ltd.] 85:15
And pressurized to 2,000 kg / cm (linear pressure) with a briquette machine [manufactured by Shinto Kogyo Co., Ltd.] at room temperature to about 4 m
A pet excrement disposal material in the form of a pellet having a size of m was prepared. 400 g of this treated material was placed in a 1-liter beaker and the surface was leveled. Contents A 30 cc artificial urine was collected in a 50 cc disposable syringe [Termo Co., Ltd.], and the urine was discharged vertically from a height of about 2 cm to a point at the center of the treated material surface of the beaker for 5 seconds. The rate of absorption of the artificial urine was measured, and then 5 minutes after sprinkling the artificial urine, the lump that had absorbed the urine was taken out with tweezers, and the weight of the wet part was measured.

Example 2 An excrement disposal material was prepared in the same manner as in Example 1 except that “KD-1” was replaced with “Gentonite” (manufactured by Kunimine Industries Co., Ltd.), and its performance was evaluated. Was performed.

Example 3 In Example 1, "KD-1": "Sunwet IM-1000MPS"
5:15 mixing ratio of "KD-1": "Sunwet IM-1000MPS":
"Luckster CB-2" [Styrene Futashicom Co., Ltd., Dainippon Ink Co., Ltd.
Excrement treating material was prepared in the same manner as in Example 1 except that the mixing ratio was changed to 84: 15: 1, and its performance was evaluated.

Example 4 In Example 1, "KD-1": "Sunwet IM-1000MPS"
5:15 mixing ratio of "KD-1": "Sunwet IM-1000MPS":
"Luckstar CB-1": Excretion in the same manner as in Example 1 except that "Nonipore 100" [Nonionic surfactant, manufactured by Sanyo Chemical Industries, Ltd.] was changed to a compounding ratio of 82: 15: 1: 2. A material was prepared and its performance was evaluated.

Comparative Example 1 85 parts of "Gentonite" and 15 parts of "Sunwet IM-1000MPS" were powder-mixed, and then 30 parts of water were sprayed and uniformly mixed. Then, the mixture was formed into a 4 mm caliber. It was placed in a chopper having a large number of holes and extruded in a rod shape. After cutting the rod-shaped material into a length of 5 mm, it was dried at 80 ° C. for 2 hours to obtain a pellet-shaped excrement disposal material, and the performance of this material was evaluated in the same manner as in Example 1.

Comparative Example 2 In Comparative Example 1, "Gentonite": "Sunwet IM-1000MP"
"S": Water: 85: 15: 30: Comparative example, except that "Gentonite": "Sunwet IM-1000MPS": "Pulverized Half: Water: 85: 15: 20: 30" Wet molding was performed in the same manner as in Example 1 to prepare an excrement disposal material, and its performance was evaluated.

Table 1 shows the performance evaluation results of the pet excrement disposal materials obtained in Examples 1-4 and Comparative Examples 1-2.

[0025]

[Table 1] * 1. Time from the end of sprinkling artificial urine to the absorption of almost all the water on the surface of the treated material (seconds) * 2. It was measured. The lower the weight, the better.

[0026]

The pet excrement disposal material of the present invention has the following effects. (1) As in the past, granulation is not performed in a wet method, pressure molding is performed in a dry method, and post-drying is not performed. Therefore, organic fiber particles are not excessively fixed to each other, and urine is absorbed. Is fast. (2) Since urine is absorbed quickly, it can be absorbed in a small amount, which is economical. (3) Since urine is adsorbed and solidified into a dumpling, the treatment after excrement adsorption is simple and the odor is small. Due to the above effects, the treatment material of the present invention is useful as a treatment material for pet excrement.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshinari Ikegami 329 Sakagoe, Ako-shi, Hyogo Prefecture Inside Ako Kasei Co., Ltd. Keiko (58) Field surveyed (Int.Cl. ⁶ , DB name) A01K 1/015

Claims (9)

(57) [Claims] 1. A pet excrement disposal material obtained by dry-press-molding a mixture comprising an inorganic powder (A), a powder of a water-absorbent resin (B) and, if necessary, a binder (C). 2. The pet excrement disposal material according to claim 1, wherein said pet excrement disposal material is formed by dry pressure molding using a roll type pressure molding machine and / or a perforated plate extrusion type molding machine. 3. The weight ratio of (A) :( B) is 99: 1 to 55: 4.
The pet excrement disposal material according to claim 1 or 2, wherein 4. The pet excrement disposal material according to claim 1, wherein (A) has an average particle size of 30 to 250 mesh. 5. The pet excrement disposal material according to claim 1, wherein the average particle size of (B) is 200 μm or less. 6. The method according to claim 1, wherein (A) is calcium carbonate.
6. A pet excrement disposal material according to any one of claims 5 to 5. 7. The method according to claim 1, wherein (A) is bentonite.
5. A pet excrement disposal material according to any one of the above items 5. 8. The pet excrement disposal material according to claim 1, wherein (C) is 0.5 to 15% by weight based on the total weight of (A) and (B). 9. The pet excrement disposal material according to claim 1, wherein (C) is a synthetic rubber-based binder.