JP2895963B2 - Animal excrement disposal material and method for producing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing an animal excrement disposal material using waste disposable diapers as a raw material. The present invention relates to a disposable disposable diaper and sanitary napkin waste produced in the process of producing disposable diapers and sanitary napkins. The present invention relates to a method for producing an animal excrement disposal material which has a water retention function and an insect repellent function as raw materials and can be incinerated in a water-containing state after use.

BACKGROUND ART Disposable diapers vary depending on products, but are generally 40 to 50% by weight of flocculent pulp such as pulverized pulp and absorbent paper, 20 to 30% by weight of a polymer absorbent such as a highly water-absorbent resin, polyethylene of a surface material,
10-15% by weight of surface material such as non-woven fabric such as polyethylene terephthalate, rayon MIX and PETMIX, 10-15% by weight of waterproofing material such as polyethylene film and polyethylene film containing calcium carbonate, and tape such as fastening tape, release tape and target tape And 5% by weight of tapes such as elastach yarns such as spandex and adhesives such as hot melt.

For example, a fluff, that is, an absorbent band wrapping a mixture of fluff made of crushed pulp and a superabsorbent resin in a tissue is placed at a predetermined location on a polyethylene film, and the upper surface of the package is sealed with, for example, a polypropylene nonwoven fabric. Rubber is attached around the waist and legs, tape fasteners are provided on both sides of the back, and support tapes for fastening the tape fasteners are provided corresponding to the respective tape fasteners. I have.

Disposable disposable diapers having such a structure are inspected during the manufacturing process by crotch cut inspection, absorber position inspection, tape position inspection, metal detection inspection, etc., and defective products are separated, but the amount of waste material is enormous. Amount.

However, this disposable diaper waste material includes, for example, about 25% by weight of a polyethylene film, a polypropylene nonwoven fabric and rubber, and contains about 25% by weight of a highly water-absorbent resin,
Since it contains pulp powder and tissue in an amount of about 50% by weight, it has no use as it is, and must be classified to separate polypropylene, polyethylene, tissue, rubber, etc. from the superabsorbent resin and pulp powder. Most of them are incinerated.

However, waste diapers have a calorific value of 5000 kcal.
Since it is as high as / kg to 6000 kcal / kg, it has to be distinguished from ordinary waste, and even if incinerated, it must be mixed with other waste and incinerated.

An object of the present invention is to solve the problems associated with the disposal of waste paper diapers.

DISCLOSURE OF THE INVENTION The present inventors have found that when polyethylene film, polypropylene nonwoven fabric and rubber are crushed to a particle size of 4 mm or less, particularly 2 mm or less, the water absorption and water retention of these powders are improved. When used as a raw material for excrement disposal materials, it was discovered that the water-absorbent resin contained in the disposable diaper waste material retained excreted urine, resulting in a lower calorific value, making it suitable for incineration. This has led to the present invention.

An object of the present invention is to provide a granular animal excrement disposal material that can be incinerated even in a water-containing state after use by effectively utilizing waste paper diapers having a high calorific value as a raw material.

That is, the animal excrement disposal material of the present invention is an animal excrement disposal material having a core formed of granules and a covering portion covering the core, wherein the main components of the core are contained. , 4m
m is a plastic waste material powder with a particle size of not more than m, and the main content of the coating surrounding the core is paper powder and water-absorbent resin. It is effectively used as an excrement disposal material. Further, the method for producing an animal excrement disposal material of the present invention classifies a crushed disposable diaper and separates it into a portion having a high content of paper powder and a superabsorbent resin and a portion having a high content of a plastic material, The portion having a high content of the separated plastic material is pulverized to a particle size of 4 mm or less, and the pulverized product is extruded and granulated to form a granule having a particle size of 3 mm or more. It is characterized in that the separated part is ground with a high content of paper powder and / or water-absorbent resin of the crushed material having a particle size of 1 mm or less. As a material processing material,
It is used effectively.

BRIEF DESCRIPTION OF THE DRAWINGS Hereinafter, an example of an embodiment of the present invention will be described with reference to FIGS. 1 and 2, but the present invention will be described with reference to FIGS. 1 and 2 below. It is not limited in any way.

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

FIG. 2 is a schematic process diagram showing a manufacturing process of an animal excrement disposal material according to another embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION In the description of the present specification and claims, that is, in the present invention, the term "paper diaper" refers to a disposable diaper, a sanitary napkin, an incontinence pad, and a milk pad as well as the production thereof. It also refers to waste materials of defective diapers, sanitary napkins, incontinence pads and milk pads generated in the process.
Among these, in particular, waste materials such as disposable diapers, sanitary napkins, incontinence pads and milk pads, and defective products such as disposable diapers, sanitary napkins, incontinence pads and milk pads, and product scraps generated during the manufacturing process. Is called waste diapers.

In the present description and claims, that is, in the present invention, the term "plastic material" refers to not only plastic materials and rubber materials of general products, but also plastic materials generated during the manufacturing process of plastic and rubber materials. And / or waste rubber material and used or discarded plastic material and / or rubber material products. Among these, in particular, waste materials such as disposable diapers, sanitary napkins, incontinence pads and milk pads, and defective diapers, sanitary napkins, incontinence pads and milk pads, and product scraps generated during the manufacturing process. The removed plastic material waste is referred to as plastic waste.

In the present invention, the animal excrement disposal material particles are formed into a granular material by a granular core portion and a coating layer portion covering the granular core portion. In the present invention, among the classified materials of the disposable diaper, the classified material is classified into the one having a higher specific gravity, and the paper powder and the water absorbent resin are partially separated (hereinafter, referred to as the classified material having the higher specific gravity).
Is formed into a granular core, is classified into the smaller specific gravity side of the classified material of the disposable diaper, and the classified material mainly containing paper powder and the superabsorbent resin (hereinafter referred to as the classified material on the smaller specific gravity side) Then, a coating layer portion is formed. By doing so, the disposable diaper, in particular, the disposable diaper waste material can be effectively used as an animal excrement disposal material, and the animal excrement disposal material manufactured in this manner is, for example, an animal excrement disposal material. For 10 g, the pseudo urine is 18 g or more, that is, the water absorption capacity is as high as 1.8 or more, but even in such a state after use, the calorific value can be made 800 kcal / kg or more, and preferably, 1000 to 2500 It can be set to kilocalories / kg, more preferably 1200 to 2500 kilocalories / kg, which enables incineration with general waste.

In the present invention, one or two or more disposable diapers are used. As such a disposable diaper, waste disposable diapers containing a plastic material of 5500 kcal / kg or more such as polyurethane, polyethylene, polypropylene, and polyester are used.

Among the classified materials of such disposable diapers, particularly, the classified material having a large particle size is a plastic material mainly containing a plastic material or a rubber material, but is pulverized to a particle size of 2.0 mm or less. Thereby, the speed of absorbing water and the ability to retain water can be significantly improved.
However, in the case of the classified material with a large particle size, that is, in the case of a plastic material-containing material, when finely pulverized to a particle size of 2.0 mm or less, particularly 1.0 mm or less, the granulated product obtained by granulation is colored gray. Although it is not preferable as an animal excrement disposal material, in the present invention, the classified material having a higher specific gravity is used as a raw material for a granular core, and the classified material having a smaller specific gravity which is white even when finely pulverized is used. , 0.2 mm or less to cover the granular core and hide the coloring to obtain an animal excrement disposal material.

In the present invention, the disposable disposable diaper material powder to be classified is a coarsely crushed waste of disposable disposable diapers, for example, in a roughly cut state. After being once classified, it is pulverized to a particle size of 4 mm or less. Waste diaper powder thus classified is 4m in particle size.
When crushed to m or less, the particle size of the plastic film and tape part is relatively coarse, 4 mm or less, mainly 2 mm or less, but other parts of disposable diaper waste material,
That is, the paper powder and the water-absorbent resin are fine and have a particle size of 1 mm or less.

In the present invention, when waste paper diapers are classified and used as raw materials for animal excrement disposal materials, most of the paper powder and water-absorbent resin contained in the waste paper diapers are used for the coating layer portion, and the remaining plastic is used. The part formed of the material and the rubber material is used for the granular core. Since the water-absorbing resin enhances the water-absorbing performance, the inclusion thereof improves the water-absorbing performance of the animal excrement treating material. Since the water retention performance can be maintained, it is not necessary to particularly make the super absorbent resin exist in the granular core.

In the present invention, the classified material on the smaller particle size side containing the paper powder and the water absorbent resin is used for the coating layer portion. It is preferable to use paper powder and a water-absorbing resin in the coating layer because the water-absorbing performance can be improved and the function of the animal excrement disposal material to adhere to the particles increases. In particular, the presence of the water-absorbent resin in the coating layer portion is convenient for removing the used portion since the wet portion adheres to form a lump after use.

In the present invention, a slight amount of water-absorbing resin is present in the granular core, but the presence of the water-absorbing resin in the granular core is preferable because it functions as a lubricant during extrusion granulation. However, since the lubricating action between particles during extrusion granulation is achieved by water added during granulation, it is preferable that the superabsorbent resin is used for the coating layer.

In the present invention, paper powder is paper powder used for disposable diapers, such as, for example, fluffy pulp, fluff made of pulverized pulp, and disposable pulp. It can be obtained by easy separation.

The water-absorbent resin present in the disposable diaper can be separated by a wet or dry method after classification. When classified by a wet method, the water-absorbent resin swells and can be easily separated. Disposable diaper waste powder after water absorbent resin is removed,
In the case of wet classification, the classified substance having a higher specific gravity can be extruded and granulated in a wet state as it is,
The classified material having the smaller weight can be mixed with the water-absorbing resin separated before the classification after drying, and sprayed on the wet granules.

In the present invention, the animal excrement disposal material reduces the calorific value because urine excreted after use is retained, but due to the calorific value of the high calorific value plastic material blended in the disposable diaper, The calorific value suitable for incineration can be maintained.

In the present invention, the water-absorbent resin includes a super-water-absorbent resin used in a disposable diaper and a so-called low-water-absorbent resin as a defective product as the super-absorbent resin, and any water-absorbent resin can be used.

In the present invention, the calorific value of the animal excrement disposal material after use is increased to 1000 to 2500 kcal / kg,
In order to make the animal excrement disposal material of the product have water retention performance, it is preferable to increase the content of plastic materials such as plastic materials and rubber materials in the granular core. In this case, it is preferable to increase the content of the plastic material classified from the paper diaper waste material powder to, for example, 50% by weight or more, for example, 70% by weight or more, or 90% by weight or more. In order to increase the plastic content of the granular core in this way, a plastic material having a relatively high calorific value, for example, a plastic material having a calorific value of 3000 kcal / kg or more, particularly a plastic waste material can be added. As described above, in order to increase the content of the plastic material in the classified material classified from the disposable diaper powder, the water-absorbent resin, or the paper powder and the water-absorbent resin can be removed in advance, and the classification can be performed. . In this case, the separated excess paper powder and water-absorbent resin can be used for another purpose.

Moreover, in the present invention, wood chips of hiba wood and / or wood chips of hinoki wood can impart deodorant function, insect repellent function and fragrance function to the animal excrement disposal material.
It can be added in an amount of up to% by weight.

In the present invention, the covering layer of the animal excrement disposal material is coated with a substance having a bactericidal action in the form of a granular core, or the covering layer or the granular core and the covering layer in order to avoid the generation of mold during storage. Parts can be added. Substances having such a bactericidal action include bactericides, preservatives and fungicides such as salt, sorbic acid or salts thereof, calcium propionate, sodium hypochlorite and / or benzoic acid or salts thereof.

In the present invention, the animal excrement disposal material is dried to a water content of 15% by weight or less, preferably 13% by weight, thereby preventing the generation of mold during storage.

When the water-absorbent resin is blended into the coating layer, the water-absorbent resin absorbs water from around the granular core at the time of excretion, swells, and acts to retain water, so that the humidity of the coating can be adjusted. preferable.

In the present invention, the water-absorbent resin used in the disposable diaper is a water-absorbent resin other than the superabsorbent resin and the superabsorbent resin. Means resin.

In the present invention, the superabsorbent resin is a resin capable of retaining its shape even when absorbing water of several tens to two hundred times its own weight, for example, a vinyl ester and an ethylenically unsaturated carboxylic acid or a derivative thereof. Saponified copolymer, starch-acrylic acid graft polymer, polyacrylic acid cross-linked product, vinyl alcohol-acrylic acid copolymer, polyacrylonitrile partially hydrolyzed product, carboxymethyl cellulose cross-linked product, polyethylene glycol Crosslinked product, chitosan salt or pullulan gel, etc., and these are used as a coating material alone or in a mixture of two or more of the classified paper powder.

In the present invention, as the water-absorbing resin other than the high water-absorbing resin, a water-absorbing resin having a water absorption capacity of less than 20 g / g, preferably a water absorption capacity of less than 50 g / g and poor water-absorbing performance, with or without moisture absorption. is there. The polyacrylic acid resin and the starch acrylic acid resin as the water-absorbing resin having a low water-absorbing performance include those having a particle diameter of 600 μm or more and fine particles of 10 μm or less, for example, 10 μm to 5 μm. Resin can be obtained by classification from waste diapers,
Alternatively, it can be obtained as a product out of the specification of polyacrylic acid resin. Particles having a particle size of 600 μm or more are preferably used for a granular core portion, and fine particles having a particle size of 10 μm or less are preferably used for a coating portion.

In the present invention, the side having a higher specific gravity obtained by classifying the disposable diaper powder is obtained by granulating the classified product. The granulation of the classified material having the higher specific gravity contains a plastic material at a relatively high content, and the granular core of the animal excrement disposal material has a large specific gravity obtained by classifying the disposable diaper powder. Obtained by granulating the side classifier. The granulation of the classified material having the higher specific gravity contains a relatively high content of a plastic material.In order to minimize generation of fine dust after granulation, for example, a granulated material having a particle size of 3 mm or more is used. It is preferable that the granulation is performed. However, when granulating into particles having a particle size of 5 mm or more, for example, it is difficult to disperse into the room from a tray box, and even if it is tentatively dispersed, it is easy to collect the particles,
It is preferable for keeping indoor hygiene. However, in these cases, the existence of particles having a particle size of 3 mm or less or the existence of particles having a particle size of 5 mm or less is not completely excluded. In the present invention, the granules can be formed into various shapes such as spherical, columnar, granular, and granular.

However, in the present invention, granulation can be performed using various types of granulators such as a pan type, a drum type, and a fluidized bed type in addition to the extrusion granulator.

According to the present invention, in order to produce an animal excrement disposal material, a disposable diaper is classified and classified into a class having a higher specific gravity and a class having a lower specific gravity. As the dry classifier, an air classifier such as a sedimentation chamber, a vertical air blower, or a projection type projection separator can be used.

In the present invention, the classified material containing the plastic material having the higher specific gravity separated by the classifier is pulverized to a particle size of 4 mm or less and used for granulation, while the specific gravity containing paper powder and the water absorbent resin is contained. The classified material on the small side of the above is used for the coating layer by pulverizing and mixing to a particle size of 0.4 mm or less or for the coating layer by pulverizing it to 0.4 mm or less and adjusting the ratio of paper powder and water absorbent resin. I do. The classified material for granulation containing the plastic material having the higher specific gravity is, for example, formed into a granulated material having a particle size of 3 mm or more, preferably 5 mm or more by an extrusion granulator, and the surface of the granulated material is In order to form a coating layer portion, a classifying material for the coating layer on the side having a lower specific gravity, which contains paper powder and a water-absorbing resin, is sprayed and coated. In this way, by coating the granules with the mixture for the coating layer of the paper powder and the water-absorbing resin, as an animal excrement disposal material, the coloring by the plastic powder can be hidden and a white appearance can be formed, It has excellent properties such as good absorption of urine excreted by animals, good water retention, and increased adhesiveness of the part where excrement adheres.

In the present invention, in order to avoid powdering and fluffing of the excrement disposal material at the time of use, a compound having an adhesive function is added to the classifier having a smaller specific gravity used for the coating layer. preferable. Examples of the compounding substance having such an adhesive function include water-soluble or water-dispersible compounding substances, such as paper powder, pulp for papermaking, pulverized pulp, and waste paper powder generated during the production of disposable diapers and napkins.

In addition, the animal excrement disposal material of the present invention includes an adhesive substance having an adhesive function, a bactericidal substance having a bactericidal action, or a bactericidal substance having a bactericidal action, in addition to the classified material having a lower specific gravity, particularly in the coating layer. Since the above substances can be compounded as compounding substances, at the time of excretion of animals, they adhere to the excrement such as urine on the animal excrement disposal material particles, and the parts to which the excrement such as urine adheres easily, The excrement is wrapped in a lump, and the disposition is easy and easy. Such adhesive substances include water-soluble or water-dispersible adhesive substances such as one or more adhesive substances such as flour, poval, starch, corn starch, carboxymethylcellulose (CMC), pullulan or gelatin. And alcohol-soluble adhesive substances include one or more adhesive substances such as hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC) or polyvinylpyrrolidone or (PVP).

Further, in the present invention, when a deodorant and / or a water absorbing agent is further mixed, the material can exhibit more excellent deodorizing performance and water absorbing performance as an animal excrement disposal material. Furthermore, when a substance having a bactericidal action is mixed into the coating layer portion, the animal excrement disposal material can be stably stored for a long period of time without generation of mold and the like.

Example 1 In FIG. 1, the disposable diaper waste powder that has been loosened and crushed by a crusher (not shown) passes through an air transfer pipe 2 that connects the crusher and the classifier 1 to the dry diaper from the crusher. Introduced into the classifier 1, the disposable diaper powder is separated into a mixture of paper powder and superabsorbent resin powder and a plastic material-containing material. When the yield of the paper powder and the superabsorbent resin powder is reduced, the mixing ratio of the mixture of the paper powder and the superabsorbent resin powder to the plastic material-containing material increases, but in the mixture of the paper powder and the superabsorbent resin powder, The amounts of the paper powder and the superabsorbent resin powder are increased, and almost all of the paper powder and the superabsorbent resin can be used.

The paper powder and the superabsorbent resin powder separated by the dry classification flow out of the small-diameter side air transfer pipe 3 of the classifier 1 and are sent to the sedimentation chamber type hopper 4, where the paper powder and the superabsorbent resin powder are separated. It is separated from the air flow and stored. The stored paper powder and superabsorbent resin powder are sent to a fine pulverizer 6 by a screw feeder 5 connected to a hopper 4, and pulverized to a particle size of 0.4 mm or less. The paper powder and superabsorbent resin powder pulverized to a particle size of 0.4 mm or less are supplied to an air transfer pipe 7 connected to a pulverizer 6.
Is transferred to the paper powder and the highly water-absorbent resin hopper 8.

A coating material mixture of a mixture of paper powder and superabsorbent resin powder pulverized to a particle size of 0.4 mm or less is supplied from a quantitative screw feeder 9 connected to a hopper 8 to a coating material mixing device 10.
And uniformly mixed to form a coating material. However, when the amount of the superabsorbent resin in the coating material is insufficient,
A super-absorbent resin powder can be added to form a coating material. In this example, in order to adjust the ratio of the superabsorbent resin, the coating material mixing apparatus 10 and the coating material tank are used.
A fixed-quantity screw feeder 12 for connecting the feeder 11 to the feeder 11 is provided.

The plastic material content separated by the dry classification flows out from the large-diameter air transfer pipe 13 of the classifier 1 and is sent to the sedimentation chamber type hopper 14, where the plastic, rubber, unremoved paper powder and high The granulated material of the plastic material mixture containing the water-absorbent resin powder is stored separately from the air flow. The stored granulated material is sent to a coarse crusher 16 by a quantitative screw feeder 15 connected to a hopper 14, and coarsely crushed by the coarse crusher 16 to a particle size of 4 mm or less. The granulated material powder coarsely pulverized to a particle size of 4 mm or less is transferred to a granulated material hopper 18 by an air transfer pipe 17 connected to a coarse pulverizer 16.

Coarsely pulverized to a particle size of 4 mm or less in the coarse pulverizer 16, the granulated material powder transferred to the granulated material hopper 18 is sent to the fine pulverizer 20 by the quantitative screw feeder 19 connected to the granulation material hopper, Pulverized to a particle size of 2 mm or less. Fine crusher 2
The fine powder of the granulated material pulverized at 0 is sent from the air transfer pipe 21 connected to the fine pulverizer 20 to the granulated material hopper 22 to be granulated material fine powder.

The granulated material hopper 22 is connected to a fixed screw feeder 23 for supplying the granulated material, and the fixed screw feeder 23 is connected to a main screw feeder 24. Disinfectant sodium benzoate weighing hopper 25
Is provided connected to a fixed screw feeder 26 connected to the main screw feeder 24, and the disinfectant sodium benzoate is provided in the fixed screw feeder 26.
Thus, it is possible to supply the granulated material fine powder already supplied to the main screw feeder 24.

In this example, the main screw feeder 24 is connected to a granulated material mixing device 27. In the present example, a water supply pipe 28 is opened in the granulated material mixing device 27 so that water can be supplied into the granulated material mixing device 27. The mixture of the granulated material fine powder and sodium benzoate supplied to the fixed screw feeder 29 is supplied to the granulated material mixing device 27 and mixed with water in the granulated material mixing device 27. Granulated material fine powder mixed by the granulated material mixing device 27,
The granulated material mixture of sodium benzoate and water is supplied to a fixed amount screw feeder 29 for conveying the granulated material mixture, which is connected to the granulated material mixing device 27, and extruded from the fixed amount screw feeder 29 for conveying the granulated material mixture. Granulator
30 hoppers 31 are supplied.

A granulated material mixture of a mixture of plastic, rubber, paper powder, superabsorbent resin, sodium benzoate, and water is introduced from a granulated material hopper 31 into an extruding granulating apparatus 30, and from a die 32 side, is formed into a columnar granulated material. Extruded as granules. In the present example, below the die 32 of the granulator 30, a vibrating sieve 33 having an upper sieve with a sieve opening of 8 mm and a lower sieve with a sieve opening of 4 mm is provided, and is extruded. Particles smaller than 4 mm are separated and removed from the obtained granules, and are sized to particles having a particle size of 8 to 4 mm. The granules sent to the vibrating sieve 33 are loosened by vibrating the vibrating sieve 33, and are sent out from a 4 mm sieve upper outlet 34 of the vibrating sieve to a coating device 35 connected to the outlet 34. The 4 mm sieve undersize particles are sent from the undersize outlet 36 to a conveyor belt 37 for transferring undersize particles connected to the undersize outlet 36, and a screw feeder for transferring the granulated material mixture connected to the conveyor belt 37. After 29, granulation equipment
Return to 30 and granulate again.

In this example, a granulated product sized to a particle size of 8 to 4 mm,
That is, the on-screen granules of the 4 mm sieve are passed through the on-screen outlet 34 through the coating device 35.
Sent to

In this example, the coating device is provided in three stages, and in the first first coating device 35, a rotating shallow-edged disk.
A coating material in which a coating material of a mixture of paper powder having a particle size of 0.4 mm or less and a superabsorbent resin is connected to the coating material mixing apparatus 10 via a fixed screw feeder 39 on the on-sieve granulated material supplied on 38. The coating material is sprayed from the supply port 41 of the material hopper 40. The sprayed coating material and the granules on the sieve are passed through the coating outlet 42 of the first coating device 35 through the first coating device in order to make the coating material adhere evenly to the surface of the granules on the sieve.
It is sent to a second coating device 43 of the same type as 35. Second coating device 43
From the coating outlet 44 of the second coating device to the third coating device 45
The granules coated with the coating material at 43 are fed and coated with the coating material. The coated granulated material coated with the coating material in the third coating device 45 is provided with a sieve having a sieve opening of 10 mm at the upper stage from a coating outlet 46 of the third coating device, and a sieve having a sieve opening of 5 mm. It is sent to the vibrating sieve 47 provided in the lower stage, where the residual coating material remaining without adhering to the granulated material, the fragments of the refined granulated material and the like are separated and removed.

The mixture of the coating material and the fragments of the granulated material removed by the vibrating sieve 47 is sent out from a 5 mm sieve under sieve outlet 48 to a sub-sieve conveying conveyor belt 49 connected to the outlet 48, and the conveyor belt 49 Is returned to the granulating device 30 via the fixed amount screw feeder 29 for conveying the granulated material mixture connected to the device, and granulated again.

In the vibrating sieve 47, the coated granulated material sized to a particle size of 10 to 5 mm is passed through the sieve outlet 50 of the 5 mm sieve of the vibrating sieve 47 by the coated conveyor belts 51, 52 and 53 for conveying the coated granulated material. First drying device 54 connected to the coated granulated material conveyor belt 53
Sent to

The coated granules sent to the first drying device 54 are dried in the first drying device 54 of the hot air dryer.

The coated granules dried by the first drying device 54 are sent out from a dried product outlet 55 of the first drying device 54 to a dried product conveying conveyor belt 56 connected to the outlet 55, and the fed dried coating The granulated product is passed through a conveyor belt 57 for transporting the dried product, and is sprayed with a polyvinyl alcohol diluting liquid in order to prevent fluffing of the coating material on the surface of the coated granulated product.
Sent to 58. In the spray device 58, a polyvinyl alcohol diluent is sprayed from a spray polyvinyl alcohol diluent tank 59. The coated granulated material sprayed with the polyvinyl alcohol dilution is supplied to a second drying device 61 of a hot air dryer from a coated granulated material conveyor belt 60 connected to a spray device 58.

The coating devices 35, 43 and 45 and the spray device 58 can spray the coating material and spray the spray solution, and can constantly spray the coating material and spray the spray solution at a fixed ratio to the granules. It is formed as follows.

The coated granulated material dried by the second drying device 61 is passed through a dried product outlet 62 of the second drying device 61 and connected to the dried product outlet 62 for a conveyor belt for transporting the dried coated granulated material.
After passing through 63 and 64, it is sent to the product hopper 65.

The dried coated granulated product sent to the product hopper 65
From the outlet 66 of the product hopper 65, the sieve opening is sent out to a vibrating sieve type sizing device 67 having a sieve of 10 mm at the upper stage and a sieve of 5 mm at the lower stage, and a particle size unsuitable for the product is obtained. Ten
Dry coated granules of not less than 5 mm and dried coated granules of less than 5 mm are separated and removed. These separated and dried dried granules are fed to a screw feeder for conveying the granulated material mixture.
After 29, it is returned to the granulator 30 and granulated again.

The dried coated granules sized to a particle size of 10 to 5 mm by the vibrating sieve-type granulating device 67 are passed through a conveyer belt 69 from a granulated material outlet 68 on a 5 mm sieve of the vibrating sieve-type granulating device 67. Is sent to the granulation material filling device 70 via the, bagged, and shipped.

Since the apparatus of this example is configured as described above, a predetermined amount of waste paper diaper powder is pulverized, classified by the classifier 1, and separated into a mixture of paper powder and superabsorbent resin and a plastic material mixture. The mixture of the paper powder and the superabsorbent resin is finely pulverized by a pulverizer 6 to a particle size of 0.4 mm or less and uniformly mixed by a coating material mixing device 10 to form a coating material. Put in. On the other hand, the plastic material mixture classified by the classifier 1 is roughly pulverized by the coarse pulverizer 16 to a particle size of 4 mm or less, and then pulverized to a particle size of 2 mm or less to obtain a granulated material. In the main screw feeder 24, the granulated material is supplied with sodium benzoate and sent to the granulated material mixing device 27, where water is supplied and uniformly mixed.

This mixed granulated material mixture is a mixture of paper powder, a superabsorbent resin, a plastic material, a rubber material and water, and is sent from a screw feeder 29 for conveying the granulated material mixture to an extrusion granulator 30. , Granulated. In the present example, the extrusion granulating apparatus 30 presses the granulated material mixture by the rotation of the screw to form a granulated product having a cross section corresponding to a hole provided in the die 32. In this example, a die having a hole diameter of 5.5 mm and a thickness of 30 mm was used.

The granulated particles extruded from the die 32 of the extrusion granulation apparatus 30 are, for example, sent to a vibrating sieve 33 having an upper sieve having an opening of 8 mm and a lower sieve having a opening of 4 mm of the sieve, and sieved. You. Under the lower sieve, the granulated material having a particle size smaller than 4 mm passes through a lower sieve outlet 36 of the lower sieve of the 4 mm sieve, passes through a conveyor belt 37 for conveying the lower sieve, and a screw feeder 29 for conveying the granulated material mixture. And sent to the extrusion granulator 30 to be granulated again.

Granules having a particle size of 8 to 4 mm, that is, granules on a 4 mm sieve,
From the outlet 34 for conveying the granulated material on the sieve, it is sent to the first coating device 35 of a rotating disk type. The granulated material sent to the first coating device 35 is covered with a coating material having a particle size of 0.4 mm or less. The coated granules coated with the first coating device 35 are sent to the subsequent second coating device 43 and third coating device 45,
Then, while being rolled by the vibrating disk, they are respectively coated in contact with the coating material already sprayed.

The coated granulated particles coated with the coating material in the coating devices 35, 43 and 45 are loosened by a vibrating sieve 47, and particles having a particle size of 10 to 5 mm are passed through a sieve outlet 50 of a 5 mm sieve of the vibrating sieve 47. It is sent to the first drying device 54 via the conveyor belts 51, 52 and 53 and dried. On the other hand, the granulated material particles having a particle size of less than 5 mm are sent to the screw feeder 29 for conveying the granulated material mixture by the conveyor belt 49 for conveying the undersized particles of the 5 mm sieve, returned to the granulating device 30, and granulated again. It is processed.

The temperature of the first drying device 54 is maintained at a temperature of 90 ° C. or higher.
The dried granules are sent to a spraying device 58 for a polyvinyl alcohol diluting liquid in order to prevent fluffing of the coating material portion on the surface of the coated granules. In the spray device 58, a polyvinyl alcohol diluent is sprayed from a spray polyvinyl alcohol diluent tank 59. The coated granulated material sprayed with the polyvinyl alcohol diluent is supplied from a conveyor belt 60 for conveying the coated granulated material to a second drying device 61 of a hot air dryer.
And dried by the second drying device at a drying temperature lower than the drying temperature of the first drying device. The dried and dried granules are sent to a product hopper 65. The dried coated granules placed in the product hopper 65 are sized by a sizing device 67, sent to a product filling device 70, packed in a bag, and shipped.

In this example, the addition of the transpirant empensulin of the insecticide is not shown, but when the use of the insecticide is necessary,
After being dried by the first dryer, the non-alcoholic organic solvent solution of transpirable empensulin can be sprayed together with the dilute solution of polyvinyl alcohol.

In this example, the disinfectant sodium benzoate is mixed in the main screw feeder 24, but the sodium benzoate solution may be sprayed together with the dilute solution of polyvinyl alcohol. Alternatively, a dilute solution of polyvinyl alcohol and a solvent solution of transpirable empensulin or a bactericide may be separately formed, and each may be sprayed separately or mixed.

Example 2 In FIG. 2, a belt conveyor for supplying disposable diaper waste material was used.
Reference numeral 71 is connected to the inlet of a rotary cutter type coarse crusher 72, and waste paper diapers are supplied to a supply belt conveyor.
By 71, it is introduced into the coarse crusher 72, the particle size is 50 to 80 mm
Crushed into particles. The lower outlet 73 of the coarse pulverizer 72 is connected to a transfer pipe 75 in which a blower 74 is provided.
Is connected to the inlet 77 at the upper stage of the cyclone type coarse classifier 76. The coarsely pulverized disposable diaper waste material is sent to a coarse classifier 76 by a blower 74, for example, with a plastic material residual ratio of 95%, and a coarse plastic material with respect to a coarsely pulverized mixture of paper powder and superabsorbent resin. The pulverized material is roughly classified by dry method.

The paper powder from which the coarsely crushed plastic material has been removed by the dry coarse classification and the coarsely classified mixture of the superabsorbent resin are subjected to a coarse classification machine.
It flows out of the upper exit 78 of 76. A transfer pipe 80 connected to the lower outlet of the coarse classifier 76 is provided with a blower 81,
The coarse classification residue of the plastic material is discharged from the coarse classification device 76 by the blower 81 and the transfer pipe 80. The coarse classification residue of the plastic material transferred by the blower 81 and the transfer pipe 80 is sent to the fine classification device 82, and the plastic material is converted into paper powder and paper powder under the classification condition of the plastic material residual ratio of 95% in the fine classification device 82. The crudely classified mixture of the superabsorbent resin is partially separated by dry classification. The finely classified mixture of the finely classified paper powder and the superabsorbent resin flows out from the upper outlet 83 of the fine classifier 82.

In this way, the classified mixture of the paper powder and the superabsorbent resin obtained by the dry rough classification and the fine classification is sent to the sieving apparatus 84 through the transfer pipe 79. The sieving device 84 is provided with a sieve 85.By sieving with the sieve 85, the finely classified mixture of paper powder and superabsorbent resin is separated into paper powder and superabsorbent resin due to the difference in particle size. Can be The finely classified paper dust on the sieve is sent from the upper transfer pipe 86 of the sieve 84 to the paper dust hopper 4 from the sieve 84 by the blower 87. On the other hand, the finely classified product of the superabsorbent resin under the sieve is sent to the superabsorbent resin hopper 90 by the transfer pipe 89 from the lower outlet of the sieving apparatus 84 by the blower 88.

The refined product of the plastic material from which the paper powder and the superabsorbent resin are partially separated is drawn out by the blowers 92 and 93 from the transfer pipe 91 connected to the lower outlet of the refiner 82 and sent to the plastic material hopper 94. . The plastic material sent to the plastic material supply hopper 94 of the sedimentation chamber type contains a plastic material, a rubber material, a paper powder remaining without being separated and a superabsorbent resin powder. Separated from the stream and stored.

In this example, the paper powder hopper 4, the superabsorbent resin hopper 90, and the plastic material hopper 94 are all sedimentation chamber hoppers having a bag filter 96 at the top, and are separated from the air flow by the bag filter 96.

In this way, the coarsely and finely classified paper powder, superabsorbent resin powder and plastic material powder are stored in the corresponding paper powder hopper 4, superabsorbent resin hopper 90 or plastic material hopper 94, respectively.

The plastic material powder stored in the plastic material hopper 94 is transferred to the plastic material hopper 94 and the coarse crusher.
The plastic material is fed from the plastic material hopper 94 to the coarse crusher 16 by the quantitative screw feeder 95 for transferring the plastic material, which connects the plastic material 16, and is coarsely crushed by the coarse crusher 16 to a particle size of 4 mm or less. The plastic material powder coarsely crushed to a particle size of 4 mm or less is transferred to a plastic material powder supply hopper 18 by an air transfer pipe 17 connected to a coarse crusher 16.

The plastic material powder transferred to the plastic material hopper 18 is sent to the pulverizer 20 by the fixed amount screw feeder 19 connected to the plastic material hopper 18,
The powder is pulverized by the pulverizer 20 to a particle size of 2 mm or less. The fine powder of the plastic material pulverized by the fine pulverizer 20 is sent from an air transfer pipe 21 connected to the fine pulverizer 20 to a plastic material hopper 22 for granulation and stored as fine plastic material powder for granulation.

The plastic material hopper 22 for granulation is connected to a fixed screw feeder 23 for supplying the plastic material for granulation, and the fixed screw feeder 23 is connected to a main screw feeder 24. The weighing hopper 25 for the disinfectant sodium benzoate is connected to the main screw feeder 24 at the outlet side.
It is provided connected to the inlet side of 26, it is possible to supply the disinfectant sodium benzoate, to the granulated plastic material fine powder already supplied to the main screw feeder 24, by the fixed amount screw feeder 26 Has become.

In the present example, the outlet side of the main screw feeder 23 is connected to the granulated material mixing device 27. In the present example, a water supply pipe 28 is further opened in the granulated material mixing device 27 so that water can be supplied into the granulated material mixing device 27. The mixture of the granulated plastic material fine powder and sodium benzoate supplied to the granulated material mixing device 27 is mixed with water in the granulated material mixing device 27. Granulating plastic material fine powder mixed in the granulating material mixing device 27,
The granulated material mixture of sodium benzoate and water is discharged from the granulated material mixing device 27 to the fixed amount screw feeder 29 for conveying the granulated material mixture, which is connected to the granulated material mixing device 27, and is discharged by the fixed amount screw feeder 29. It is supplied to the hopper 31 of the extrusion granulation device 30.

Plastic material, rubber material, paper powder, super absorbent resin,
The granulated material mixture of the mixture of sodium benzoate and water is introduced from the granulated material hopper 31 into the extrusion granulator 30 and extruded from the die 32 as a columnar granulated material. In the present example, below the die 32 of the granulator 30, a vibrating sieve 33 having an upper sieve with a sieve opening of 8 mm and a lower sieve with a sieve opening of 4 mm is provided, and is extruded. Particles smaller than 4 mm are separated and removed from the obtained granules, and sized to particles having a particle size of 8 to 4 mm to form a granular core.

Since the paper core and the highly water-absorbent resin are mixed in the granular core without being separated at a considerable ratio, they have a high water-absorbing ability, and are used as they are as animal excrement disposal materials. be able to.

However, in this example, in order to further increase the water absorption capacity and to reduce the calorific value after use, it is coated with a mixture of paper powder and a superabsorbent resin.

The granular core of the granules sent to the vibrating sieve 33 is loosened by the vibration of the vibrating sieve 33, and a coating device 35 connected to the vibrating sieve 4 mm sieve upper outlet 34 and the outlet 34. Will be sent to

In this example, the coating material is prepared by mixing the paper powder and the superabsorbent resin powder that have been classified and stored in the respective hoppers.

In this example, a quantitative screw feeder 5 connected to a fine crusher 6 is connected to the paper powder hopper 4, and the paper powder stored in the paper powder hopper 4 is supplied to the fine crusher 6 by the quantitative screw feeder 5. It is sent and crushed to a particle size of 0.4 mm or less. The paper powder pulverized to a particle size of 0.4 mm or less is transferred and stored in a hopper 8 for supplying coated paper powder by an air transfer pipe 7 connected to a pulverizer 6.

In this example, the superabsorbent resin hopper 90 is provided with a fixed screw feeder connected to the finely pulverizing machine 97 for superabsorbent resin.
The superabsorbent resin powder stored in the superabsorbent resin hopper 90 is sent to a crusher 97 by a fixed screw feeder 98 and crushed to a particle size of 0.4 mm or less. A transfer pipe 100 having a blower 99 is connected to the lower outlet of the crusher 97, and the fine powder of the superabsorbent resin pulverized by the pulverizer 97 is provided with a settling chamber type superabsorbent for coating having a bag filter 96. The resin is transferred and stored in the resin supply hopper 11 via the transfer pipe 100.

Crushed to a particle size of 0.4 mm or less and coated paper powder hopper 8
Is fed from a fixed screw feeder 9 connected to the coated paper powder hopper 8 to a coating material mixing apparatus 10. A superabsorbent resin having a particle size of 0.4 mm or less is sent from the hopper 11 for supplying the superabsorbent resin for coating to the coating material mixing apparatus 10. The paper powder and the superabsorbent resin sent to the coating material mixing device 10 are uniformly mixed in the coating material mixing device to form a coating material. However, when the amount of the superabsorbent resin in the coating material is insufficient, the superabsorbent resin powder can be added to make the coating material. In the present example, in order to adjust the ratio of the paper powder and the superabsorbent resin in this way, a quantitative screw feeder 12 that connects the coating material mixing device 10 and the superabsorbent resin supply hopper 11 is provided. .

At the outlet of the coating material mixing device 10, a coating material hopper 40 is provided.
A fixed amount screw feeder 39 is provided to be connected to the coating material mixed and prepared by the coating material mixing apparatus.
The powdery mixture of the granulated paper powder and the superabsorbent resin powder of 4 mm or less is sent by the coating material hopper 40 by the quantitative screw feeder 39 and stored.

The granular core of the granulated product sent to the vibrating screen 33 has an opening of 4 m.
A vibrating sieve with a 4mm opening, which is loosened from a single vibrating sieve 33
From the sieve outlet 34 of 33, it is sent to the coating device 35. On the other hand, the undersize particles of the vibrating sieve 33 having an opening of 4 mm
From, it is sent out to a conveyor belt 37 for conveying the undersize particles connected to the undersize outlet 36, passes through a screw feeder 29 for conveying the granulated material mixture connected to the conveyor belt 37, and is returned to the granulating apparatus 30. It is granulated again.

In this example, the granular core portion of the granulated material sized to a particle size of 8 to 4 mm, that is, the on-screen granulated material of the vibrating sieve having an opening of 4 mm is sent to the coating device 35 from the on-screen outlet 34. Coating equipment 35
The fixed core feeder 41
The coating material is sprayed from a coating material hopper 40 connected via a.

In this example, the coating device is provided in three stages, and in the first first coating device 35, a rotating shallow-edged disk.
38, the coating material of the powdery mixture of the paper powder having a particle size of 0.4 mm or less and the superabsorbent resin powder,
The coating material is sprayed from the fixed quantity screw feeder 41 of the coating material hopper 40. The sprayed coating material and the granular core of the granulated material on the sieve are connected to the coating outlet of the first coating device 35 in order to uniformly adhere the coating material to the surface of the granular core.
From 42, the granulated material coated by the first coating device is
It is sent to a second coating device 43 of the same type as the coating device 35, and also in the second coating device 43, the granulated material is coated with a coating material, as in the case of the first coating device 35. The granulated material coated by the second coating device 43 is sent from the coating material outlet 44 of the second coating device 43 to the third coating device 45. In the case of another coating device also in the third coating device 45, Is coated with a coating material in the same manner as described above. The coated granules coated by the third coating device 45 are:
From the coating outlet 46 of the third coating apparatus, a sieve with a sieve opening of 10 mm is provided at the upper stage, and a sieve opening is sent to a vibrating sieve 47 having a sieve of 5 mm at the lower stage, where it does not adhere to the granulated material. The remaining coating material and finely divided granulated material fragments are separated and removed.

The mixture of the coating material and the fragments of the granulated material removed by the vibrating sieve 47 is sent out from a 5 mm sieve under sieve outlet 48 to a sub-sieve conveying conveyor belt 49 connected to the outlet 48, and the conveyor belt 49 Is returned to the granulating device 30 via the fixed amount screw feeder 29 for conveying the granulated material mixture connected to the device, and granulated again.

With the vibrating sieve 47, the coated granulated material sized to a particle size of 10 to 5 mm is passed through the 5 mm sieve on-screen outlet 50 of the vibrating sieve 47, by the coated granulated material conveyor belts 51, 52, and 53, A first drying device connected to the coated granulated material conveyor belt 53
Sent to 54.

The coated granules sent to the first drying device 54 are dried in the first drying device 54 of the hot air dryer.

The coated granules dried by the first drying device 54 are sent out from a dried product outlet 55 of the first drying device 54 to a dried product conveying conveyor belt 56 connected to the outlet 55, and the fed dried coating The granulated product is passed through a conveyor belt 57 for transporting the dried product, and is sprayed with a polyvinyl alcohol diluting liquid in order to prevent fluffing of the coating material on the surface of the coated granulated product.
Sent to 58. In the spray device 58, a polyvinyl alcohol diluent is sprayed from a spray polyvinyl alcohol diluent tank 59. The coated granulated material sprayed with the polyvinyl alcohol dilution is supplied to a second drying device 61 of a hot air dryer from a coated granulated material conveyor belt 60 connected to a spray device 58.

The coating devices 35, 43 and 45 and the spray device 58 can spray the coating material and spray the spray solution, and can constantly spray the coating material and spray the spray solution at a fixed ratio to the granules. It is formed as follows.

The coated granulated material dried by the second drying device 61 is passed through a dried product outlet 62 of the second drying device 61 and connected to the dried product outlet 62 for a conveyor belt for transporting the dried coated granulated material.
After passing through 63 and 64, it is sent to the product hopper 65.

The dried coated granulated product sent to the product hopper 65
From the outlet 66 of the product hopper 65, the sieve opening is sent out to a vibrating sieve type sizing device 67 having a sieve of 10 mm at the upper stage and a sieve of 5 mm at the lower stage, and a particle size unsuitable for the product is obtained. Ten
Dry coated granules of not less than 5 mm and dried coated granules of less than 5 mm are separated and removed. These separated and dried dried granules are fed to a screw feeder for conveying the granulated material mixture.
After 29, it is returned to the granulator 30 and granulated again.

The dried coated granules sized to a particle size of 10 to 5 mm by the vibrating sieve-type granulating device 67 are passed through a conveyer belt 69 from a granulated material outlet 68 on a 5 mm sieve of the vibrating sieve-type granulating device 67. Is sent to the granulation material filling device 70 via the, bagged, and shipped.

Since the apparatus of the present example is configured as described above, a predetermined amount of waste paper diaper powder is coarsely pulverized by the coarse pulverizer 72, and classified by the coarse classifier 76 and the fine classifier 82 to obtain paper powder and It is divided into a classified mixture of superabsorbent resin and a plastic-containing classified mixture containing paper powder and superabsorbent resin. The classified mixture of the paper powder and the superabsorbent resin is classified by the sieving device 84, respectively.

The classified sieved paper powder and the superabsorbent resin mixture are finely pulverized to a particle size of 0.4 mm or less by a fine pulverizer 6 or 97, respectively, and uniformly mixed by a coating material mixing apparatus 10 to coat. The material is put into the coating material hopper 40.

On the other hand, the plastic material powder classified by the coarse classifier 76 and the fine classifier 82 still contains unseparated paper powder and superabsorbent resin, and is used as a granular material for animal excrement disposal materials. Or it can be used as a granular core. Therefore, in this example, the plastic material powder is
Coarsely pulverized to a particle size of 4 mm or less by 16 and then pulverizer 2
It is pulverized to a particle size of 2 mm or less according to 0 to obtain a granulated material. In the main screw feeder 24, the granulated material is supplied with sodium benzoate and sent to the granulated material mixing device 27, where water is supplied and uniformly mixed.

This mixed granulated material mixture is a mixture of paper powder, a superabsorbent resin, a plastic material, a rubber material and water, and is sent from a screw feeder 29 for conveying the granulated material mixture to an extrusion granulator 30. , Granulated. In the present example, the extrusion granulation device 30 presses the granulated material mixture by rotation of a screw to form a granulated product having a cross section corresponding to a hole provided in the die 32. In this example, a die having a hole diameter of 5.5 mm and a thickness of 30 mm was used.

The granulated particles extruded from the die 32 of the extrusion granulation apparatus 30 are, for example, sent to a vibrating sieve 33 having an upper sieve having an opening of 8 mm and a lower sieve having a opening of 4 mm of the sieve, and sieved. You. Under the lower sieve, the granulated material having a particle size smaller than 4 mm passes through a lower sieve outlet 36 of the lower sieve of the 4 mm sieve, passes through a conveyor belt 37 for conveying the lower sieve, and a screw feeder 29 for conveying the granulated material mixture. And sent to the extrusion granulator 30 to be granulated again.

Granules having a particle size of 8 to 4 mm, that is, granules on a 4 mm sieve,
From the outlet 34 for conveying the granulated material on the sieve, it is sent to the first coating device 35 of a rotating disk type. The granulated material sent to the first coating device 35 is covered with a coating material having a particle size of 0.4 mm or less. The coated granules coated with the first coating device 35 are sent to the subsequent second coating device 43 and third coating device 45,
Then, while being rolled by the vibrating disk, they are respectively coated in contact with the coating material already sprayed.

The coated granulated particles coated with the coating material in the coating devices 35, 43, and 45 are loosened by a vibrating sieve 47, and particles having a particle size of 10 to 5 mm are passed through a sieve outlet 5 of a 5 mm sieve of the vibrating sieve 47. It is sent to the first drying device 54 via the conveyor belts 51, 52 and 53 and dried. On the other hand, the granulated material particles having a particle size of less than 5 mm are sent to the screw feeder 29 for conveying the granulated material mixture by the conveyor belt 49 for conveying the undersized particles of the 5 mm sieve, returned to the granulating device 30, and granulated again. It is processed.

The temperature of the first drying device 54 is maintained at a temperature of 90 ° C. or higher.
The dried granules are sent to a spraying device 58 for a polyvinyl alcohol diluting liquid in order to prevent fluffing of the coating material portion on the surface of the coated granules. In the spray device 58, a polyvinyl alcohol diluent is sprayed from a spray polyvinyl alcohol diluent tank 59. The coated granulated material sprayed with the polyvinyl alcohol diluent is supplied from a conveyor belt 60 for conveying the coated granulated material to a second drying device 61 of a hot air dryer.
And dried by the second drying device at a drying temperature lower than the drying temperature of the first drying device. The dried and dried granules are sent to a product hopper 65. The dried coated granules placed in the product hopper 65 are sized by a sizing device 67,
It is sent to the product filling device 70, packed in a bag and shipped.

Also in this example, as in the case of FIG. 1, the addition of the transpirable empensulin of the insecticide is not shown. However, when the use of the insecticide is necessary, the transpiration is carried out after drying by the first dryer. A non-alcoholic organic solvent solution of neutral empensrin can be sprayed together with a dilute solution of polyvinyl alcohol. Although the disinfectant sodium benzoate is mixed in the main screw feeder 24, the sodium benzoate solution may be sprayed together with the dilute solution of polyvinyl alcohol. Alternatively, a dilute solution of polyvinyl alcohol and a solvent solution of transpirable empensulin or a bactericide may be separately formed, and each may be sprayed separately or mixed.

Example 1. This example was performed according to the flowchart shown in FIG.

In this example, the disposable diaper waste powder crushed to a particle size of 4 mm or less is composed of 17 parts by weight of paper powder (about 38% by weight), 12 parts by weight of superabsorbent resin (about 27% by weight), a polypropylene nonwoven fabric and a polyethylene sheet, etc. It was 16 parts by weight (about 35% by weight), and was obtained by classifying the classification yield of paper powder and superabsorbent resin to be about 20% by weight of the classified paper diaper. For the mixture of paper powder and superabsorbent resin obtained by classification, to use as a coating material,
It was pulverized to a particle size of 0.3 mm or less. Plastic-containing mixture 1
00 parts by weight was used as a granulated material, crushed to a particle size of 2 mm or less, and water was added to the crushed mixture so as to have a water content of 40% by weight, followed by mixing to produce a granulated material mixture. Put this granulated material mixture into the extrusion section of the extrusion granulation apparatus, 5.5 mm in diameter
Through a die having a thickness of 30 mm and a plate, and the mixture was appropriately cut with a chopper and granulated. The granulated product is sized by a sizing device, put into a vibrating disk coating device, and while vibrating the dish-shaped disk, 60 parts by weight of paper powder having a particle size of 03 mm or less and high water absorption of a particle size of 150 μm or less. The coating material of the mixture of 40 parts by weight of the conductive resin was applied by spraying on the surface of the granules at a ratio of 15% by weight to the granules. The coated granules were loosened with a sizing machine and dried with a hot air drier until the water content became 13%.

The product obtained was granular with a particle size of 10-5 mm. This granule has a calorific value of 6149 kcal / k when absolutely dried.
g and a calorific value on drying containing 13% water of 5,266 kcal / kg. 30 g of water of 14.7 g of this cat sand was absorbed. The amount of heat generated during the absorption of water in a so-called wet state during use was 1309 kcal / kg, indicating that incineration treatment after use was possible. The granules were collected and used as cat litter sand.

In the room, 50 g of sand for this cat's toilet, 1 tap water
Pseudo urine prepared by dissolving 10 g of sodium chloride and 10 milliliter of aqueous ammonia in 000 milliliter was added within 30 milliliter diameter of 20 mm, and the portion hardened by the pseudo urine was taken out. In the toilet sand of this example, the amount of toilet sand solidified by the pseudo urine was 14.7 g.

Therefore, the water absorption of the toilet sand of this example is
It was 30 / 14.7 times, that is, 2.04 times.

The cat litter was laid on the cat litter with a thickness of 3 cm. The cat used the litter as usual, and there was no problem in using the litter.

After the cat used it for excretion, the portion of the cat toilet sand that the cat excreted could be easily removed.
Moreover, the cat litter of the present example had water absorption and deodorization properties, and was able to avoid generation of unpleasant odor indoors.

Example 2 In the same manner as in Example 1, also in this example, the disposable diaper waste material powder pulverized to a particle size of 4 mm or less contains 17 parts by weight of paper powder, 12 parts by weight of a superabsorbent resin, and 16 parts by weight of polypropylene nonwoven fabric and polyethylene sheet. Configuration.

In this example, waste paper diaper powder from which the superabsorbent resin had been removed in advance was classified and separated into paper powder, a polypropylene nonwoven fabric, a polyethylene sheet and the like. The yield of paper powder was about 52% by weight of the classified paper diapers, and the yield of polypropylene nonwoven fabric and polyethylene sheet was 48% by weight. The paper powder obtained by the classification was pulverized to a particle size of 0.3 mm or less in order to obtain a coating material.

100 parts by weight of the plastic-containing mixture obtained by classification is used as a granulation material, crushed to a particle size of 2 mm or less, and water is added to the crushed mixture so that the water content becomes 40% by weight or more, and the mixture is mixed. A granulated material mixture was produced. This granulated material mixture was put into an extruding section of an extruding granulator, extruded through an opening having a diameter of 5.5 mm and a die having a plate thickness of 30 mm, and appropriately cut with a chopper to perform granulation. The granulated material is sized by a granulator and put into a vibrating disk coating device. While the dish-shaped disk is vibrated, a coating material having a particle size of 0.3 mm or less is added to the granulated material by 15% by weight. Of the granulated material at a ratio of 1. In this example, the coating material was prepared by mixing 60 parts by weight of the paper powder obtained by classification with 40 parts by weight of a highly water-absorbent resin having a particle size of 150 μm or less, which was obtained by previously removing from waste paper diaper powder. .

The coated granules were loosened with a sizing machine and dried with a hot air drier until the water content became 13%. The obtained product is
It was a granular material having a particle size of 10 to 5 mm. This particulate matter had a calorific value of 8769 kcal / kg when absolutely dried and a calorific value of 7546 kcal / kg when dried containing 13% water. 30g of water was absorbed into 16g of cat sand. When this water is absorbed,
The calorific value in the so-called wet state during use was 2225 kcal / kg, indicating that incineration after use was possible.

 The granules were collected and used as cat litter sand.

In the room, 50 g of sand for this cat's toilet, 1 tap water
Pseudo urine prepared by dissolving 10 g of sodium chloride and 10 milliliter of aqueous ammonia in 000 milliliter was added within 30 milliliter diameter of 20 mm, and the portion hardened by the pseudo urine was taken out. In the toilet sand of this example, the amount of toilet sand solidified by the pseudo urine was 14.7 g.

Therefore, the water absorption in the toilet sand of this example is
It was 30 / 14.7 times, that is, 2.04 times.

The cat litter was laid on the cat litter with a thickness of 3 cm. The cat used the litter as usual, and there was no problem in using the litter.

After the cat used it for excretion, the portion of the cat toilet sand that the cat excreted could be easily removed.
Moreover, the cat litter of the present example had water absorption and deodorization properties, and was able to avoid generation of unpleasant odor indoors.

Example 3 This example was performed according to the flowchart shown in FIG.

In this example, the recovery of flocculent pulp from pulverized waste diapers is about 80%, and the recovery of superabsorbent resin is about 50%.
The classification product of the obtained plastic material was 13% by weight of flocculent pulp, 22% by weight of superabsorbent resin, and 65% by weight of exterior materials such as plastic materials and rubber materials.

In this example, a classification product of a plastic material was used for the granular core.

The plastic material powder was pulverized to a particle size of 2 mm or less, water was added so as to have a water content of 38 to 42% by weight, and the mixture was mixed well by a mixer to produce a granulated material mixture. This granulated material mixture is put into an extruding section of an extruding granulating apparatus, extruded through a die having an opening of 5.5 mm in diameter and a plate having a thickness of 25 mm, and appropriately cut and granulated by a chopper to form a granulated core. Formed. The granulated product is sized by a sizing device, put into a vibrating disk coating device, and while the dish-shaped disk is vibrated, 10.5 parts by weight of a crushed product of cotton-like pulp having a particle size of 0.4 mm or less is obtained. , 4.5 parts by weight of a mixture with a highly water-absorbent resin having a particle size of 0.4 mm or less was used as a coating material, and the mixture was applied by spraying on the surface of the granulated product. The coated granules were loosened with a sizing machine and dried with a hot air drier. After drying,
For the purpose of preventing peeling, a diluted solution of polyethylene glycol was sprayed on the surface of the coated granule and dried again. Drying was performed until the moisture content of the coated granules became 11%. The product obtained was granular with a particle size of 10-5 mm. This granule has a calorific value of 6080 kcal / kg when dried absolutely, 11%
The calorific value during drying with water was 5,341 kcal / kg. The calorific value in the wet state when using so-called wet when 20 g of pseudo urine was absorbed into 8.5 g of the product was 1154 kcal / kg, indicating that incineration after use was possible.

The composition of the product is as follows: 85 parts by weight of granular core, consisting of 11% by weight of cottony pulp, 19% by weight of super absorbent resin, and 55% by weight of plastic material, and 15 parts by weight of coating part The content was 10.5% by weight of floc pulp and 4.5% by weight of a superabsorbent resin.

In this example, the exterior material was used as a raw material for animal excrement disposal materials, and a part of the collected and classified cotton-like pipe and superabsorbent resin was used as a raw material for the coating material. 57.5% by weight of pulp and 12.5% by weight of super absorbent resin
Was recovered as a recycled product and reused as floc pulp and as a superabsorbent resin.

The granules of this product were collected to make cat litter sand. In a room, simulated urine prepared by dissolving 10 g of salt and 10 ml of ammonia water in 1000 ml of tap water was added to 50 g of sand for the toilet of the cat within 20 mm liter diameter within 20 mm, and a portion solidified by the simulated urine was taken out. In the toilet sand of this example, the amount of toilet sand solidified by the pseudo urine was 8.5 g.

Therefore, the water absorption of the toilet sand of this example is
It was 20 / 8.5 times, that is, 2.4 times.

The cat litter was laid on the cat litter with a thickness of 3 cm. The cat used the litter as usual, and there was no problem in using the litter.

After the cat used it for excretion, the portion of the cat toilet sand that the cat excreted could be easily removed.
Moreover, the cat litter of the present example had water absorption and deodorization properties, and was able to avoid generation of unpleasant odor indoors.

Example 4 In this example, waste paper diapers are treated by a wet classification method.

Since the waste pulverized diaper having a particle size of 4 mm or less was treated by the wet classification method, the recovery of flocculent pulp was about 80% or more, and the recovery of superabsorbent resin was about 99% or more.

In this example, a classification product of a plastic material was used for the granular core.

The obtained classified product of the plastic material contained 15% by weight of cottony pulp, 85% by weight of a so-called exterior material such as a plastic material and a rubber material, and had a water content of 40 to 50% by weight.

In this example, a classification product of a plastic material was used for the granular core. In this example, since the super-absorbent resin was hardly contained in the classified product of the plastic material, 3% by weight of the classified super-absorbent resin was added to facilitate the extrusion molding operation. .

The plastic material powder was mixed by well stirring with a mixer to produce a granulated material mixture. This granulated material mixture is put into the extruding section of the extruding granulator and has a diameter of 5.
The mixture was extruded through a die having an opening of 5 mm and a plate thickness of 25 mm, and was appropriately cut with a chopper and granulated to form a granulated material to be a granular core. This granulated product is sized by a sizing device,
Put into a vibrating disk coating device, vibrate the dish-shaped disk, and pulverize 10.5 parts by weight of cotton-like pulp having a particle size of 0.4 mm or less and 4.5 parts by weight of a pulverized cotton pulp having a particle size of 0.4 mm or less. The mixture with the water-absorbent resin was used as a coating material, and the mixture was applied by spraying on the surface of the granulated material. The coated granules were loosened with a sizing machine and dried with a hot air drier. After drying, a diluted solution of polyethylene glycol was sprayed on the surface of the coated granule for the purpose of preventing peeling, and dried again. Drying reduces the water content of the coated granules.
It was done until 11%. The resulting product has a particle size of 10-5m
m granular material. This particulate matter had a calorific value of 6120 kcal / kg when absolutely dried and a calorific value of 5377 kcal / kg when dried with 11% moisture. The calorific value in the so-called wet state at the time of soaking when 20 g of pseudo urine was absorbed by 9 g of product was 1225 kcal / kg, indicating that incineration after use was possible.

The composition of the product is 85 parts by weight of the granular core, consisting of 14% by weight of cotton-like pulp, 3% by weight of superabsorbent resin, and 68% by weight of plastic material, and 15 parts by weight of the covering part. The content was 10.5% by weight of floc pulp and 4.5% by weight of a superabsorbent resin.

In this example, the exterior material was used as a raw material for animal excrement disposal materials, and a part of the classified and collected cottony pulp and superabsorbent resin was used as a raw material for the coating material. 74.5% by weight of pulp and 38% by weight of superabsorbent resin
It was recovered as a recycled product and used again as floc pulp and as a superabsorbent resin. This shows that the recovery by wet separation is higher than that by dry separation.

The granules of this product were collected to make cat litter sand. In a room, simulated urine prepared by dissolving 10 g of salt and 10 ml of ammonia water in 1000 ml of tap water was added to 50 g of sand for the toilet of the cat within 20 mm liter diameter within 20 mm, and a portion solidified by the simulated urine was taken out. In the toilet sand in this example, the amount of toilet sand solidified by the pseudo urine was 9 g.

Therefore, the water absorption of the toilet sand of this example is
It was 20/9 times, that is, 2.2 times.

The cat litter was laid on the cat litter with a thickness of 3 cm. The cat used the litter as usual, and there was no problem in using the litter.

After the cat used it for excretion, the portion of the cat toilet sand that the cat excreted could be easily removed.
Moreover, the cat litter of the present example had water absorption and deodorization properties, and was able to avoid generation of unpleasant odor indoors.

In the above embodiments, waste paper diapers using a superabsorbent resin are targeted. However, similar results can be obtained for waste paper diapers using a water absorbent resin other than the superabsorbent resin.

INDUSTRIAL APPLICABILITY The animal excrement disposal material of the present invention classifies waste diaper waste powder having a particle size of 4 mm or less and separates it into a separated product of paper powder and a water-absorbent resin and a separated product of a plastic-containing material. Then, the plastic content is pulverized and granulated to a particle size of 2 mm or less, and formed into a columnar or granular form.
m or less, and used as a coating material for coating the granules formed in the columnar or granular form, so that all the raw materials are used as compared with conventional animal excrement disposal materials. It can be obtained from disposable diaper waste powder, and can produce an animal excrement disposal material at low cost.

Further, the present invention provides a method for coloring waste paper diaper powder by pulverization, separating paper powder obtained by classifying waste diaper powder and water-absorbent resin into particles having a particle size of 0.4 mm or less, and crushing the crushed material with a coating material. Can be solved by coating as
Waste diaper powder can be effectively used.

In the present invention, the disposable diaper used as a raw material is a waste material having a high calorific value. However, since the waste diaper powder contains a water-absorbent resin, the water absorption rate is high, and therefore, the incineration treatment of general garbage is performed. 1000 to 2500 kcal / g, which is necessary for the product, but the present invention classifies and separates the plastic content from the paper powder and the water-absorbent resin content. The amount of resin contained can be reduced to increase the calorific value after use, and the calorific value required for incineration of animal excrement disposal materials wet with used excrement is 1000 to 2500 kcal / g. This makes it possible to perform incineration, which has been difficult in the past.

Therefore, the present invention, unlike the conventional excrement disposal materials, can be treated as general waste and can be easily incinerated as combustible waste, and the wastes can be disposed of more easily than conventional excrement disposal materials. Processing is easy.

The present invention classifies waste paper diaper powder, separates the paper powder and the water-absorbent resin-containing material and the plastic-containing material, and uses each as a raw material. Since the amount of the powder and the water-absorbent resin-containing material is small, the amount of the water-absorbent resin can be reduced by increasing the amount of the paper powder in the coating material. It can be separated and recovered from waste diaper powder in advance by sieving or the like. Further, instead of the superabsorbent resin, waste water absorbent resin having low water absorbing ability can be used, and an inexpensive adhesive substance can be used, so that the production cost of the animal excrement disposal material can be reduced.

Claims (19)

(57) [Claims] An animal excrement disposal material having a granular core portion and a covering portion covering the core portion, wherein the granular core portion is mainly formed of a plastic material powder having a particle size of 4 mm or less. An animal excrement disposal material, wherein the covering part is mainly formed of a mixture of paper powder and a water-absorbent resin. 2. The animal excrement according to claim 1, wherein the core contains at least 20% by weight of a plastic material powder, and the remainder is paper powder and a smaller amount of water-absorbent resin than paper powder. Processing materials. 3. The animal excrement according to claim 1, wherein the core contains at least 30% by weight of a plastic material powder, and the remainder is paper powder and a smaller amount of water-absorbent resin than paper powder. Processing materials. 4. The animal excrement according to claim 1, wherein the core contains at least 50% by weight of a plastic material powder, and the remainder is paper powder and a smaller amount of water-absorbent resin than paper powder. Processing materials. 5. The animal excrement according to claim 1, wherein the core contains at least 70% by weight of a plastic material powder, and the remainder is paper powder and a smaller amount of water-absorbent resin than paper powder. Processing materials. 6. The animal excrement according to claim 1, wherein the core contains at least 90% by weight of a plastic material powder, and the remainder is paper powder and a smaller amount of water-absorbent resin than paper powder. Processing materials. 7. The animal according to claim 1, wherein the core contains 90% by weight or more of the plastic material powder, 8% by weight or less of the paper powder, and the remainder is a water absorbent resin. Excrement treatment material. 8. The animal excrement disposal material according to any one of claims 1 to 7, wherein the core material is a plastic material powder derived from a disposable diaper waste material. 9. The core part, wherein the plastic material powder is a plastic waste material powder derived from waste paper diapers, and the paper powder and the water-absorbent resin forming the covering portion are derived from waste paper diaper material. The animal excrement disposal material according to any one of claims 1 to 7. 10. The animal excrement disposal material has a unit weight of
The animal excrement disposal material according to any one of claims 1 to 6, wherein the calorific value in a state of absorbing 1.8 times the weight of water is 800 kcal / kg or more. 11. The calorific value of the animal excrement disposal material is 1000 to 2500 kcal / kg in a state of absorbing water having a weight 1.8 times the unit weight of the animal excrement disposal material. The animal excrement disposal material according to claim 1. 12. The method according to claim 1, wherein the calorific value of the animal excrement disposal material is 1200 to 2500 kcal / kg or more when two times the amount of water of the animal excrement disposal material is absorbed. The animal excrement disposal material according to claim 1. 13. An animal comprising a mixture of paper powder having a particle size of 4 mm or less, a water-absorbent resin, and a waste plastic powder, wherein the mixture is derived from waste diaper waste powder. Excrement disposal material. 14. A pulverized disposable diaper is classified and separated into a portion having a high content of paper powder and a water-absorbent resin and a portion having a high content of a plastic material, wherein the separated plastic material has a high content. The portion is pulverized to a particle size of 4 mm or less, the pulverized product is extruded and granulated to form a granulated product of a particle size of 3 mm or more, and the granulated product is separated with the separated pulverized product of a particle size of 1 mm or less. A method for producing an animal excrement disposal material, comprising coating with a portion having a high content of paper powder and / or water-absorbent resin. 15. The animal excrement according to claim 11, wherein the classification of the pulverized disposable diaper is performed under a classification condition in which the paper powder and the water-absorbent resin are obtained in a range of 15 to 30% by weight. Manufacturing method of material to be treated. 16. The method for producing an animal excrement disposal material according to claim 11, wherein the classification of the pulverized disposable diaper is performed in a dry manner. 17. Classification of the crushed disposable diaper is performed in a dry manner,
12. The method for producing an animal excrement disposal material according to claim 11, wherein the paper powder and the water absorbent resin are obtained in a range of 15 to 30% by weight. 18. The method for producing an animal excrement disposal material according to claim 11, wherein the classification of the crushed paper diaper is performed by a wet method. 19. Classification of the crushed paper diaper is performed by a wet method,
12. The method for producing an animal excrement disposal material according to claim 11, wherein the paper powder and the water-absorbent resin are obtained in a range of 15 to 30% by weight.