JP2002262691A - Granular material for treatment of animal excrement and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material useful for the treatment of animal excrement and having high water-retainability and water-absorption speed from waste paper, especially even a material having relatively high water-repelling property such as newspaper. SOLUTION: The granular material for the treatment of animal excrement is composed of granules formed by granulating waste paper powder having a particle size of <=3 mm and a powdery water-absorbing resin of an amount smaller than the amount of the waste paper and attaching a surfactant to the surface of the granules.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to waste paper, that is, pulverized waste of diaper waste, pulverized waste of cutting waste in the manufacture of disposable diapers, punched waste, pulverized paper of waste paper printed or laminated paper. Crushed paper whose surface is covered with a paraffin coating or plastic material coating, crushed paper waste such as waste paper diaper powder, or a mixture thereof, or an animal made from a mixture of the above-mentioned crushed paper waste and plastic waste material Excrement disposal material and its manufacturing method,
The present invention relates to an animal excrement disposal material that can be incinerated in a water-containing state after use and a method for producing the same.

[0002]

BACKGROUND ART As animal excrement disposal materials such as cat litter,
Mineral sand such as zeolite is used. But,
Cat sand made from such mineral sand is difficult to dispose of after use, which is a problem. Therefore, pulp or paper powder that is flammable and easily wets with water is mixed with a highly water-absorbent resin to form particles. The cat litter is collected together with the garbage, crushed together with the garbage, and incinerated.

[0003]

However, the use of crushed pulp is problematic because it is more difficult to obtain than before and is relatively expensive. The present inventor has already, for example, crushed waste paper diaper waste such as defective paper diapers,
Crushed animal paper diaper waste such as bad animal paper diapers,
Pulverized waste sanitary napkins such as bad sanitary napkins,
The crushed material of milk pad waste such as defective milk pad, the crushed material of sweat pad waste such as defective sweat pad, the crushed material of plastic coated paper waste and / or the crushed material of plastic waste have water absorption and water retention. It was discovered, and it was proposed to granulate these waste materials into animal excrement disposal materials such as cat litter. In addition, the present inventor considers that among the pulverized materials of these waste materials, for example, in the case of a relatively water-repellent material such as newsprint, even if it has water retention, the water absorption rate becomes relatively small, which is considered a problem. ing. SUMMARY OF THE INVENTION An object of the present invention is to solve a problem relating to a water absorption speed of paper waste.

[0004]

SUMMARY OF THE INVENTION The present invention relates to an animal excrement disposal material having a large water retention and water absorption rate, even for paper waste materials, particularly, for example, relatively repellent materials such as newspapers. It is intended to provide. The present inventor increases the water absorption performance and increases the water absorption rate by treating the surface of the granulated material of the crushed paper waste material and the crushed plastic waste material that is hard to get wet or easy to repel water with a surfactant. The present invention has been found to increase the amount and can be used as cat litter.

That is, according to the present invention, a paper waste material powder having a surface not easily wetted by water and having a particle size of 3 mm or less and a powdery water-absorbent resin in an amount smaller than the paper waste material are mixed and granulated to form granules. ,
A method for producing a granular animal excrement disposal material, characterized in that a surfactant is applied to the surface of the granule by spraying and drying a surfactant on the surface of the granule. The present invention also provides a paper waste powder having a particle size of 3 mm or less having a surface that is hardly wetted by water, and a water-absorbent resin having a smaller amount than the paper waste powder and an amount smaller than the paper waste powder having a particle size of 3 mm or less. The plastic waste material powder is mixed and granulated to form granules, and a surfactant is sprayed and dried on the surface of the formed granules, whereby the surfactant is formed on the surface of the granules. The present invention relates to a method for producing a granular animal excrement disposal material, which is characterized in that it is adhered.Furthermore, the present invention provides that the paper waste material is a crushed material of a disposable diaper, a crushed material of cutting waste during the production of a disposable diaper, and printing. Crushed paper, paraffin coated or plus A method for producing a granular animal excrement disposal material according to any one of claims 1 to 3, wherein the method is a pulverized product of paper covered with a coating material coating. The present invention forms a granulated product by mixing and granulating paper waste powder having a particle size of 3 mm or less having a surface that is hardly wetted by water and a powdery water-absorbent resin in a smaller amount than the paper waste.
Spraying a surfactant on the surface of the formed granules,
A granular animal excrement disposal material characterized in that a mixture of paper waste powder and a water-absorbent resin is adhered thereon and a coating layer is formed and dried to form a coating portion on the granulated material. In the manufacturing method.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, paper waste materials that are hardly wetted or easily repelled by water include, for example, crushed waste of diaper waste, crushed cut waste in the manufacture of disposable diapers, punch waste, waste paper, and printing. Crushed printed paper such as newspapers, magazines, advertisements, etc., or crushed paper whose surface is covered with a paraffin coating or plastic material coating such as laminated paper, crushed paper waste such as paper diaper waste powder, or these And mixtures of the above-mentioned waste paper and crushed plastic waste.

[0007] In the present invention, the surfactant is applied to the granulated material of paper waste to increase the water absorption rate of water, and may be a cationic surfactant, a nonionic surfactant or a nonionic surfactant. , Anionic surfactants can be used. Examples of anionic surfactants include dodecylbenzene sulfonic acid and sulfosuccinic anionic surfactants, and examples of nonionic surfactants include octyl phenyl ether and polyoxyethylene derivatives. Examples of the surfactant include lauryltrimethylammonium chloride, stearyltrimethylammonium chloride, and coconutamine acetate.

In the present invention, as the granulated product, a crushed paper waste material or a mixture of the crushed paper waste material and a water absorbent resin can be used. In the present invention, the granular animal excrement disposal material has a water content of 15% by weight or less, preferably 10% by weight or less.
By drying to a concentration of 20% by weight, the formation of mold during storage can be prevented. It is preferred to dry until it is.

In the present invention, the pulverized particles of the laminated paper are wetted with water and can retain water between the pulverized particles, so that they have water absorption and water retention properties. It is preferable to add a water-soluble resin, since the excrement can be sufficiently absorbed and water can be retained when the granular animal excrement disposal material is used. In addition, adding the water-absorbent resin to the mixture to be subjected to molding, in the stage of granulating the mixture to be molded, while enhancing the water retention function of the mixture to be molded, as a lubricant during granulation of the mixture to be molded In order to function, extrusion granulation can be performed smoothly,
More preferred. In this case, the water absorbent resin is one of the granulated materials.
The content is 0% or less, but preferably 0.5 to 5% by weight.

In the present invention, the animal excrement disposal material comprises:
A core and / or a coating can be formed. In this case, the superabsorbent resin can be used for the core or the cover or the core and the cover. For example, when a highly water-absorbent resin is added to the granular core of the animal excrement disposal material, the superabsorbent resin absorbs water from around the granular core during excretion,
Since it swells and acts to retain water, the humidity of the core and the coating can be adjusted, which is preferable.

In the present invention, the superabsorbent resin is a resin capable of retaining its shape even if it absorbs water of several tens to 200 times its own weight. For example, a vinyl ester and an ethylenically unsaturated carboxylic acid Or a saponified copolymer with a derivative thereof, a graft polymer of starch and acrylic acid, a crosslinked product of polyacrylic acid, a copolymer of vinyl alcohol and acrylic acid, a partially hydrolyzed product of polyacrylonitrile, and a crosslinked product of carboxymethyl cellulose And a crosslinked product of polyethylene glycol, a gel of chitosan or pullulan, and the like, which are used alone or as a mixture of two or more of these in waste paper diapers.

In the present invention, the water-absorbing resin is preferably a high water-absorbing resin having a high water-absorbing performance. For example, the water-absorbing ratio is less than 20 g / g, which is poor.
Defective resin can be used as the superabsorbent resin. Defective polyacrylic acid resins having low water absorption performance include those having a particle size of 600 μm or more and 10 μm.
m or less, and these defective superabsorbent resins can be obtained, for example, by classification from waste diapers, or can be obtained as nonstandard products of polyacrylic acid resins. Defective products having a particle size of 600 μm or more are preferably used for the granular core portion, and fine defective products having a particle size of 10 μm or less are preferably used for the coating portion. As described above, since the waste material of the diaper contains the highly water-absorbent resin, when the waste material of the diaper is mixed with the paper powder, the amount of the water-absorbent resin can be reduced accordingly.

In the present invention, the granulated material of the animal excrement disposal material may be a granulated material alone, but may have a core portion and a coating layer portion. When forming the core portion and the coating portion, the surfactant is preferably contained in the coating portion. In the present invention, a fungicide, that is, a substance having a bactericidal action, can be added to the granular core, the coating layer, or the granular core and the coating layer in order to prevent the generation of mold during storage. Examples of the fungicides having such a bactericidal action include fungicides, preservatives and fungicides such as sodium chloride, sorbic acid or salts thereof, calcium propionate, sodium hypochlorite and / or sodium benzoate or salts thereof. There is. In the present invention, it is preferable to mix an adsorbent or a deodorant such as powdered activated carbon, bentonite or silica into the granular granules, the core or the coating material.

In the present invention, in order to prevent the excrement disposal material from being powdered at the time of use, it is preferable to mix a material having an adhesive function with the pulverized waste diaper powder. Examples of the substance having such an adhesive function include water-soluble or water-dispersible substances such as paper powder, paper pulp, papermaking sludge, pulp sludge, polyvinyl alcohol (PVA), flour, starch, corn starch, carboxymethyl cellulose (CMC). ), Pullulan or gelatin, which may be used alone or as a mixture of two or more. Examples of alcohol-soluble compounding substances include hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), and polyvinylpyrrolidone or (PVP). In this case as well, these may be used alone, Alternatively, two or more of these can be used as a mixture.

In the present invention, when the granular animal excrement disposal material is granulated by blending bentonite powder and / or amorphous silica powder with disposable diaper powder, the fine dust after granulation is reduced. In order to avoid the presence as much as possible, for example, it is preferable to granulate into granules having a particle size of 3 mm or more, but when granulating into particles having a particle size of 5 mm or more, for example, it becomes difficult to disperse from a toilet box into a room. Even if it is scattered, it is easy to pick up and collect particles, which is preferable for keeping indoor hygiene. However, in these cases, the presence of particles of 3 mm or less and the presence of particles of 5 mm or less are not completely excluded. In the present invention, the granulated product is spherical, columnar, granular,
It can be formed into various shapes such as granules.

Further, when the paper waste material powder of the coating material to be adhered to the surface of the granulated material of the paper diaper waste material is adhered together with a water-soluble or alcohol-soluble adhesive, the granulated material is excreted when the animal is excreted. It is preferable because the granules easily adhere to each other and become solid due to urine or the like attached to the surface. When forming a coating layer formed on the surface of the granulated waste paper diaper powder with a mixture of paper waste powder and a water-absorbent resin, if polyacrylamide having an aggregating action is blended, the adhesion between the coated particles becomes better. preferable. In the present invention, the mixture of the disposable diaper powder and the superabsorbent resin is mixed in a mixing device with or without mixing water, and can be granulated by a granulating device. As the granulation device, a conventionally known extrusion granulation device can be used when mixing by adding water, and when mixing without adding water, a roll-type disk extrusion granulator or a disk pelletizer can be used. And the like can be used. When granulating with water,
If you need to dry but granulate without adding water,
When forming the coating layer, it is carried out by spraying water, but it can still be less than 5% by weight and can be produced without the need for a drying step.

However, in the present invention, granulation by adding water can be performed by using various types of granulators such as a pan type, a drum type and a fluidized bed type in addition to the extrusion granulator. After the granulation of the disposable diaper waste material powder, after granulation, a substance having an adhesive ability, a water-absorbing resin, an oil-absorbing material, a substance having a bactericidal action, etc., are sprayed, etc., to obtain the desired properties on the surface of the granulated substance It is preferable to form a coating layer having the following formula, attach a substance having an adhesive ability or the like to the coating layer, and then dry to prevent the coating layer from easily peeling off.

The granular animal excrement disposal material of the present invention includes:
In particular, in the step of coating the core material with a coating material, paper waste powder and superabsorbent resin, and in addition to this, wheat flour, poval, starch or other substances having an adhesive action, or substances having a bactericidal action Alternatively, since two or more of these compounded substances can be mixed, they adhere to the animal excrement and enclose the excrement in a lump, and the disposition is simple and easy. When a deodorant and / or a water-absorbing agent is mixed in the coating layer, the smell of food and drink adhering to dishes such as diaper waste powder dishes is eliminated, and the deodorant is excellent as an animal excrement disposal material. It can exhibit properties and water absorption. Furthermore, when a substance having a bactericidal action is mixed in the granular core and / or the coating, the animal excrement disposal material can be stored for a long period of time without generating mold and the like. it can

[0019]

EXAMPLES Hereinafter, embodiments of the present invention will be described with reference to examples, but the present invention is not limited by the following description and examples. FIG. 1 is a schematic process diagram showing a process for producing a granular animal excrement disposal material according to one embodiment of the present invention.

In FIG. 1, an apparatus 1 for producing a granular animal excrement disposal material includes a belt 2 for supplying newspaper waste material.
Are connected to the crusher 3. In this example, the outlet 4 of the crusher 3 is connected to a belt conveyor 5 for forming a dry pulverized pulp of newsprint, and the outlet 6 of the belt conveyor 5 is connected to a belt conveyor 7. The belt conveyor 7 is connected to the inlet 9 of the crusher 8 and
Is connected via an air transfer pipe 11 to an inlet 13 of a sedimentation chamber 12 for sedimenting and separating the pulverized material. The outlet 14 of the sedimentation chamber 12 is connected to a screw feeder 15, and a superabsorbent resin supply tank 16 for supplying the superabsorbent resin to the crushed newsprint is connected to the screw feeder 15 via a fixed amount conveyor 17. A water supply tank 18 for supplying water for granulation to a mixture of newspaper and superabsorbent resin is connected to the downstream side of the tank via a water supply pipe 19. In this example, the screw feeder 15 is connected to an inlet 21 of a granulator 20 of a disk pelleter type. The outlet 22 of the granulator 20 is connected to a belt conveyor 23, and the granulated product is transferred from the outlet of the granulator 20 to the vibration type coating device 2 by the belt conveyor 23.
4 is sent to the entrance 25. In this example, the vibration type coating device 24 is provided with a spray nozzle 27 of a hydrophilic agent spray device connected to the hydrophilic agent dilution tank 26 so as to protrude. The outlet pipe 28 of the vibration type coating apparatus 24 is
9, the granulated material coated with the hydrophilic agent is sent to a vibrating sieving machine 29, where the granulated material having a diameter of 5 mm and a length of 6 mm is sieved, and an outlet 30 of the vibrating sieving machine 29 is sieved. To a belt conveyor 31 connected to the belt conveyor. The outlet 32 of the belt conveyor 31 is connected to a product tank 33 and has a diameter of 5 m.
m products are collected, sent to an automatic packaging device 35 via a belt conveyor 34 connected to a product tank 33, and packaged.

Example 1 In the apparatus shown in FIG. 1, a granular animal excrement treating material manufacturing apparatus 1 includes a belt 2 for supplying newsprint waste.
, 95 parts by weight of newsprint is supplied and crushed by the crusher 3. In this example, the crushed newsprint is sent from an outlet 4 of the crusher 3 to a crusher 8 through belt conveyors 5 and 7 to be crushed to a particle size of 3 mm or less to form a dry crushed pulp of the newsprint. . The crushed newsprint is
The outlet 10 of the crusher 8 is fed from the inlet 13 through an air transfer pipe 11 into a sedimentation chamber 12 for sedimentation and separation of the pulverized material, and is separated therefrom. The pulverized newsprint separated in the sedimentation chamber 12 is sent out to the screw feeder 15, and 5 parts by weight of the superabsorbent resin is mixed with the pulverized newsprint from the superabsorbent resin supply tank 16 via the quantitative conveyor 17. Next, 10% of the total water is supplied from the water supply tank 18 to the mixture of the crushed newsprint mixed with the superabsorbent resin and the superabsorbent resin through the water supply pipe 19. The mixture of the pulverized newsprint mixed with water and the superabsorbent resin is introduced by the screw feeder 15 from the inlet 21 of the disk pelletizer type granulator 20 and granulated.
The granulated material granulated by the granulator 20 is supplied from the outlet of the granulator 20 via a belt conveyor 23 to a vibration type coating device 24.
At the inlet 25 of the hydrophilic agent dilution tank 26
Of the hydrophilic agent is sprayed from the spray nozzle 27 of the hydrophilic agent spray device. The granulated material sprayed with the hydrophilic agent diluting solution is passed through the outlet pipe 28 of the vibration-type coating device 24 and vibrated through a sieve 29.
The granulated material coated with the hydrophilic agent is passed through a vibrating sieve 29
The granulated material having a diameter of less than 5 mm and a length of less than 6 mm can be sieved. 5mm or more diameter and 6mm length sieved
The above-mentioned mixed granulated product of the crushed newsprint and the superabsorbent resin,
It is delivered to the belt conveyor 31 from the outlet 30 of the vibrating sieve 29. The mixed granulated product sent to the belt conveyor 31 is introduced into a product tank 33 from an outlet 32 thereof, and products having a diameter of 5 mm and a length of 6 mm are collected. The products collected in the product tank 33 are sent to an automatic packaging device 35 via a belt conveyor 34 to be connected, and are packaged.

Example 2 In this example, newsprint was used as the paper waste powder, mixed with 5% of a superabsorbent polymer (superabsorbent polymer), granulated, and excreted for animals. Although it was treated, the disposable diaper waste material contains a superabsorbent resin. Therefore, 15 parts by weight of a pulverized material having a particle size of 3 mm or less of a defective disposable diaper, which is generated in a cutting process at the time of manufacturing a disposable diaper, is mainly made of polyethylene and polypropylene. 3 of the contained cutting waste (trim loss)
80% by weight of a pulverized product having a particle size of not more than mm and 5% by weight of a rejected sanitary napkin are mixed and granulated to obtain an animal excrement disposal material.

Example 3 In this example, 30% by weight of a rejected paper diaper was replaced with 30% by weight of a rejected paper diaper in place of the ground paper of newspaper and the 5% superabsorbent resin (superabsorbent polymer) as the paper waste powder of Example 1. An animal excrement disposal material can be obtained by using 70% by weight of trim loss.

Test Examples As the hydrophilic agent used in Examples 1, 2 and 3, for each surfactant, a surfactant diluent (a) prepared by diluting 10 ml of surfactant with 80 ml of water, and 10 ml of surfactant The animal excrement disposal material manufactured using the surfactant diluent (b) diluted with 140 ml of water and the surfactant diluent (c) diluted with 10 ml of surfactant with 740 ml of water was used as a specimen. , For each sample, diameter 140mm height 1
A 50 mm glass cylindrical container was filled to a height of 100 mm, and 20 ml of the simulated urine was placed in the center of the cylindrical container for 5 to 6 seconds with a 50 ml syringe. The results are shown in Table 1 below. According to Examples 1, 2 and 3, cases in which a hydrophilic agent was not used in the process of producing an animal excrement disposal material were compared with Comparative Examples 1, 2 and 3 respectively.
And Table 1 Examples Surfactant Surface tension Water absorption speed (degree of reaching the bottom) Type Dilution Example 1 C a No Normal (minimum reaching the bottom) Example 1 C b No No Bad (reaching the bottom) Example 1 Example 2 B a No good (does not reach the bottom) Example 2 B b No Good (does not reach the bottom) Example 2 B c No Normal (reaches the bottom) Implementation Example 3 A a No No Good (does not reach the bottom) Example 3 Ab No Good (Does not reach the bottom) Example 3 Ac No Good (Does not reach the bottom) Comparative Example 1 Yes Bad (Most reached the bottom almost straight) Comparative Example 2 Yes Poor (reach to bottom. Almost straight) Comparative Example 3 Yes Poor (reach to bottom. Almost straight) In the table, surfactant A indicates the surfactant sodium dodecylbenzenesulfonate, and the surface activity Agent B Surfactant octyl phenyl ether and surfactant C indicate the surfactant lauryl trimethyl ammonium chloride.

[0025]

According to the present invention, a granular animal excrement disposal material is made of a water-repellent or water-repellent material such as a plastic material or a waste material thereof, or a water-repellent or water-repellent plastic. Paper waste having a thin film or the like is formed into a granular form by mixing paper waste powder having a particle size of 3 mm or less, and a surfactant solution is applied to the surface of the formed granular material. As compared with the material, the absorption speed of the liquid such as urine is high, and it can be absorbed in a relatively short time. After use, it can be incinerated as general waste.

According to the present invention, water-repellent paper waste not used as a conventional raw material for animal excrement disposal materials is used as a raw material for animal excrement disposal materials by utilizing its water retention.
In addition to compensating for the shortage of raw materials for animal excrement disposal materials, the plastic materials in the waste materials are used to solve the problems related to the flame retardancy of wet animal excrement disposal materials at once.
This is meaningful in terms of effective use of resources, reduction of disposal costs of paper waste, and reduction of disposal of environmental waste.

[Brief description of the drawings]

FIG. 1 is a schematic flow chart showing a process of manufacturing an animal excrement disposal material according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Production apparatus of granular animal excrement disposal material 2, 5, 7, 23, 31, 34 Belt conveyor 3 Crusher 4 Outlet of crusher 5 Quantitative belt conveyor 6 Outlet of belt conveyor 5 8 Crusher 9 Crusher Inlet section 10 crusher outlet section 11 air transfer pipe 12 sedimentation chamber 13 inlet section of sedimentation chamber 12 14 outlet section of sedimentation chamber 12 screw feeder 16 high-grade aqueous resin supply tank 17 quantitative conveyor 18 water supply tank 19 water supply pipe REFERENCE SIGNS LIST 20 granulator 21 granulator inlet 22 granulator outlet 24 coating device 25 inlet of coating device 24 hydrophilic agent dilution tank 27 spray nozzle of hydrophilic agent spray device 28 outlet tube of coating device 24 29 vibration Type sieve 30 Outlet of vibratory type sieve 29 32 Outlet of belt conveyor 31 Product tank 35 Automatic packaging device

Claims (5)

[Claims] 1. A paper waste material powder having a particle size of 3 mm or less having a surface that is hardly wetted by water and a powdery water-absorbent resin in a smaller amount than the paper waste material are mixed and granulated to form granules. A method for producing a granular animal excrement disposal material, characterized in that a surfactant is applied to the surface of said granules by spraying and drying a surfactant on the surface of said granules. 2. A paper waste powder having a particle size of 3 mm or less having a surface which is hardly wetted by water, a water-absorbent resin having a smaller amount than the paper waste powder and a plastic waste powder having a particle size of 3 mm or less and less than the paper waste powder. Mix and granulate to form granules,
Manufacturing a granular animal excrement disposal material, characterized in that a surfactant is applied to the surface of the granules by spraying and drying a surfactant on the surface of the granules. Method. 3. A crushed paper disposable diaper, a crushed swarf in the manufacture of disposable diapers, a crushed printed paper, a crushed paper having a paraffin coating or a plastic material coating on its surface. The method for producing a granular animal excrement disposal material according to any one of claims 1 to 3, wherein the material is a material. 4. The method for producing a particulate animal excrement disposal material according to claim 1, wherein the surfactant is a cationic surfactant. 5. A paper waste material powder having a particle size of 3 mm or less having a surface that is hardly wetted by water and a powdery water-absorbent resin in an amount smaller than the paper waste material are mixed and granulated to form a granulated product. A surfactant is sprayed on the surface of the granulated material, and a mixture of paper waste powder and a water-absorbent resin is adhered thereon to form a coating layer and dried. A method for producing a granular animal excrement disposal material, characterized by forming