JP2002142590A - Material for treating pet urine and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material for treating pet urine, so designed as to prevent urine from smelling and to improve handling properties when used. SOLUTION: This material for treating pet urine is obtained by coating a material for treating pet urine, made by coating wood flour with bentonite and a thickener, with 0.22-2.2 wt.% of a phosphoric acid as a deodorant material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pet urine treatment material and a method for producing the same, and more particularly, not only does it not adhere to pet hair and the like and has good urine absorption efficiency, but also forms a dumpling after urination. The present invention relates to a pet urine treatment material which can be further incinerated and does not smell urine, and a method for producing the same.

[0002]

2. Description of the Related Art Various types of pet urine treatment materials have been conventionally provided. For example, JP-A-62-23993
In the invention described in Japanese Patent Application Publication No. 2-100, "100 parts of pulp balls having a diameter of 2 to 5 mm are uniformly impregnated with 40 parts of an aqueous solution containing 1.25% of a deodorant of zero shu using a rocking mixer, and then bentonite powder (250 mesh whole product) ), 25 parts were charged, uniformly dispersed and adhered to the surface of the pulp ball, and then dried using a rotary dryer at a hot air temperature of 115 ° C. to obtain a product. ”

According to the present invention, the diameter of the pulp sphere is made large in order to separate the particulate matter having absorbed water and the particulate matter which has not absorbed and to treat only the particulate matter which has absorbed water. . The invention described in Japanese Patent Application Laid-Open No. 4-278033 discloses that "a sieve having a diameter of 1 mm passes 100%,
The main component is wood flour that passes through 50% or more of the sieve (claim 1), and does not collapse when moved with a finger, but collapses when pressed with some force (paragraph number " 0022)) "things" are disclosed.

[0004] The present invention is characterized in that it is molded but can be broken. The invention described in JP-A-5-328865 describes a dry granulated product (claim 1) containing mainly wood flour and having a particle size of 1 mm or more, and particularly having a particle size smaller than 1 mm. It is preferable to separate fine powder portions (paragraph number “000”).
9 ")".

The invention described in Japanese Patent Publication No. 7-40844 discloses a nucleus containing 60% by weight or more of at least one of pulp and wood fragments having a diameter of 2 mm or less, a bentonite layer covering the nucleus, The present invention relates to a water-soluble polymer layer covering the bentonite layer (Claim 1). Urine-absorbing particles not containing carboxymethylated cellulose (water-soluble polymer) are liable to be powdered and have a gray-black color. (Paragraph number “0018”). It is described. In producing urine absorbing particles, "wet pulverized pulp and sawdust are placed in a container having a relatively shallow bottom, and vibrated to be granulated. After sieving, bentonite and carboxymethylated cellulose are used. May be sequentially applied, and finally, a drying process may be performed (paragraph number “0015”). And wet moist pulp coated with bentonite and a water-soluble polymer layer.

Further, the invention described in Japanese Patent Application Laid-Open No. 7-184502 discloses that "the inner shell comprises pulp, a superabsorbent polymer, guaian gum and talc, and the outer shell has spots on the outer ring surface. Powdered CMC, PV
A, polyacrylate, guaian gum, powdered pulp adhesive (composition in summary) ". Furthermore, the invention described in Japanese Patent No. 2630339 discloses that “a flat plate having a thickness of 5 mm is prepared by pressing various organic short fibers, and this is cut with a cutter to form a granulated product having a particle size of about 5 mm. 10% by weight of a water-absorbing resin is sprinkled on the surface (paragraph number "0027" summary) ".

[0007]

In contrast to such prior art, the present inventor of the present invention has a combination of ease of handling and efficient absorption of urine, and particularly, has been designed to prevent urine odor. An object of the present invention is to provide a urine treating material and a method for producing the same. Therefore, we focused on the prevention of urine odor.

[0008] Next, the size of the final product. Here, if the final product is fine, it may fly up due to the movement of the pet or adhere to pet hair and be scattered. Conversely, it has been found that if the size is too large, the urine makes it difficult for the urine treating agent to harden. On the other hand, even if the final product is formed to the same size, it is better to granulate fine wood flour and bentonite flour with water than to coat bentonite etc. on relatively large wood flour. It was found that urine absorption was good.

Therefore, the present invention provides a method of coating phosphoric acid as a deodorizing material in a range of 0.22 to 2.2% by weight around a wood flour, around a urine treatment material coated with bentonite and a thickener. As a prerequisite, if necessary, the size of the starting material, wood flour, and the final product are limited to prevent urine odor, improve handling during use, and improve urine absorption. It is an object of the present invention to provide a pet urine treatment material and a method for producing the same.

[0010]

Therefore, the present invention according to claim 1 of the present invention comprises 0.22 to 2.2% by weight of phosphoric acid.
It is characterized by being formed by attaching. Therefore, the invention according to claim 2 of the present invention is formed by coating bentonite and a thickener around wood flour, and further adhering 0.22 to 2.2% by weight of phosphoric acid around the bentonite. It is characterized by the following.

[0011] The invention according to claim 3 is characterized in that a bentonite layer and a mixed layer in which bentonite and a thickener are coated with water mixed with phosphoric acid are sequentially provided around the wood flour. I do. The invention according to claim 4 uses wood flour having an average particle size of 250 μm or less as wood flour, mixes the wood flour with bentonite flour, adds water, granulates the wood flour to 500 to 4500 μm, It is characterized by being formed by adhering phosphoric acid at 0.22 to 2.2% by weight therearound.

A fifth aspect of the present invention is characterized in that, in addition to the configuration of the fourth aspect of the present invention, the main component is wood flour having a size of 8 to 110 μm. According to a sixth aspect of the present invention, in addition to the configuration of the fourth or fifth aspect, when mixing the wood flour and the bentonite flour, the amount of the wood flour is reduced to 60 to 80% by weight when the water content is excluded. It is characterized by.

According to a seventh aspect of the present invention, in addition to the constitution of the fourth, fifth or sixth aspect, the bentonite powder has an average particle diameter of 20 μm or less. Claim 8
The invention described in the above is characterized in that the surface is coated with bentonite in addition to the constitution of the invention according to the fourth, fifth, sixth or seventh aspect. The invention according to claim 9 is that the bentonite is coated with moisture around the wood flour, and after drying, the bentonite and the thickener are further coated with moisture mixed with phosphoric acid, and then dried, The amount is 0.
22 to 2.2% by weight.

The invention according to claim 10 has an average particle size of 25.
Wood powder of 0 μm or less and bentonite powder having an average particle diameter of 20 μm or less are mixed, and then, while adding water, 500 to
It was characterized in that granulation was carried out to 4500 μm, and after that, 0.22 to 2.2% by weight of phosphoric acid was further adhered to the periphery, followed by drying. Note that phosphoric acid can be added as a compound.

Here, wood flour refers to wood chips or the like that have been ground with a pulverizer to a size of 300 μm or less. The wood flour is obtained by grinding plants such as wood chips, vines, stems and the like, cutting fibers, and then forming spherical particles.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the process diagram shown in FIG. (Fine crushing) First, make wood flour. Sawdust having a water content of about 13% or wood chips is crushed with a grinder to make the average particle diameter 250 μm or less.

Since sawdust is usually about 1 mm, the sawdust is also finely pulverized. As a result of the measurement, 80% of the wood flour was distributed in the range of 8 to 110 μm. The average particle size was 30 to 80 μm. In addition, the water content was reduced to 7% or less by using a pulverizer.

In this pulverization, if a mortar pulverizer is used, the pulverized product can be maintained as spherical as possible.
Other grinders can be used. Moreover, in order to make it spherical by using a mortar-type pulverizer, it is necessary to cut a piece of wood chip to some extent. If a long fiber remains, the fiber portion becomes acicular and hardly spherical.

That is, in this mortar type crusher, crushing of wood pieces, cutting of fibers, and formation of spheres are simultaneously performed to form wood flour. (Mixing) Next, bentonite powder is mixed with the finely ground wood powder. Here, wood powder 70% by weight, bentonite powder 30
The mixture is put into a ribbon-type mixer at a ratio of% by weight, and mixed for 10 minutes or more. In addition, the expression of weight% is described by weight excluding the water content in each component. In this specification, the same applies to the following.

Here, since both the wood flour and the bentonite flour are dried, they are uniformly mixed. Here, it has been confirmed that the weight ratio between the wood powder and the bentonite powder can be used in the range of wood powder: bentonite powder = 60 to 80:40 to 20. By the way, if the wood flour is less than 60% by weight, it may become granules but stick to the mixer, making it difficult to carry out the work.
If it is 0% by weight or more, no grains are formed.

The bentonite powder has an average particle size of 20 μm.
m or less are used. Further, the average particle size of the actually used bentonite powder was 3.485 μm. However, in practice, it has been confirmed that if the bentonite powder has an average particle diameter of 20 μm or less, it can sufficiently withstand use. Further, the bentonite powder used here had a sodium content of 2.5% by weight or more, a moisture value of 10% or less, and a swelling degree of 15 m.
Those having a l / 2 g or more, particularly about 25 ml / 2 g, were used.

(Granulation) Next, about 60% by weight of water is added to the mixture of the wood powder and the bentonite powder, and primary granulation is performed by a granulator. When the mixture and water are simultaneously supplied to the center of a rotating disk, the mixture and water move outward due to centrifugal force, but the granulator used here forms a primary granulation by entanglement during this movement. It is to let.

Here, the reason for adding the water is to integrate the wood powder and the bentonite powder in a mixed state by the water. Here, when the amount of added water is increased,
The formed primary granules have a large diameter, and when the amount of added water is reduced, the formed primary granules have a small diameter. Here, it is formed to have an average particle size of about 200 to 1000 μm.

The primary granules thus formed are formed in a granular state in a state where wood powder and bentonite powder are mixed. The granulator used here was manufactured by the company. (Milling) In the process of adding the bentonite powder to the small particles obtained in the previous step “granulation” and moving it on a rotating disk, the small particles are attached to each other via the bentonite powder to increase the diameter. is there. As a result, the resulting sized granules are
The grains are dense and the bulk specific gravity is large.

Specifically, the small particles and bentonite powder of the preceding step are put into a rotating disk at a ratio of 125: 15,
Kneading and grain growth are performed simultaneously. The size of the sized granules varies depending on conditions, but is 300 to 2,000.
It is about 0 μm. The granulator used here was a dedicated machine manufactured by the company.

(Primary drying) Next, the sized granules are dried. Here, the sized granules are dried to prevent the shape from being lost. Specifically, it is dried at 180 ° for 5 minutes to reduce the water content to 10% or less. It should be noted that the water content is usually about 3%.

After drying as described above, classification is performed.
Here, the dry granules that proceed to the next step are 500 to 4500
This is performed to make the range of μm. This is because when a product is 500 μm or less, it is in the form of powder, soars by the movement of the pet, or adheres to the pet hair and is scattered. This is because the absorption of the water becomes worse.

The dried particles removed are small as they are, and large ones are pulverized and then re-entered into the process of "regulated granulation". (Sizing) In this step, the bentonite powder is adhered to the surface of the dried granules that have been cured by removing moisture, thereby facilitating solidification by urine and preventing urine odor.

Specifically, rolling granulation is performed while mixing 14 kg of phosphoric acid mixed water and 30 to 33 kg of mixed powder with 30 kg of dry granules. Here, the phosphoric acid mixed water is prepared by previously adding phosphoric acid to water in a weight ratio of water: phosphoric acid =
A mixture obtained at a ratio of 100: 5.0 is used. Therefore, here, the total weight of the dry granules and the mixed powder is 60
The phosphoric acid is 14 × 5.0 / 105.
It means that 0 = 0.67 kg was added. At this time, phosphoric acid is added to the weight of wood flour, bentonite, and thickener in an amount of 1.
This means that 11% by weight was added.

The range of the addition is preferably from 0.22 to 2.2% by weight of phosphoric acid based on the weight of the wood flour, bentonite and thickener. Here, when the content is 0.22% by weight or less, the deodorizing effect is poor,
This is because when the content is 2.2% by weight or more, the solidification strength is reduced. Further, the rolling granulator used here is shaped like a pot, and while rotating the bottom of the pot, water is added and secondary granulation is performed inside the pot to obtain sized granules. .

Specifically, the rotation of the pan causes the dried grains to roll in the pan. The bentonite powder is added to the dried granules in the form of a batter by adding a mixed powder of bentonite powder, a binder and a pigment, and phosphoric acid mixed water. The bentonite powder, the binder and the pigment have been mixed in advance using a ribbon mixer or a drum mixer. The mixing ratio at that time is set to be bentonite powder: binder: pigment = 100: 0.5: 0.35. Further, as the binder, CMC, guar gum and the like can be used. In addition, as a pigment,
For example, an iron oxide pigment can be used.

The bentonite powder was 35 μm as described above.
m or less are used. Further, the reason why the bentonite powder is added here is to improve the urine absorption performance and to connect the wet urine treatment material to form a dumpling mass. Through this process, bentonite powder containing phosphoric acid further adhered to the peripheral surface of the mixture of wood powder and bentonite powder.

Further, the sizing here has a water content of about 20% due to the addition of the phosphoric acid mixed water during the process.
The rolling granulator used here was a custom-ordered product manufactured by Okawara Seisakusho Co., Ltd. (Secondary drying) The secondary drying is drying performed in order to form a dumpling-like mass at the stage of absorbing urine and to prevent mold or the like from occurring during storage of the product.

More specifically, the sized granules are dried at a temperature of about 180 ° so as to have a water content of 7% or less, to obtain a product. Normally, drying is performed until the moisture content becomes slightly less than 5%. (Flue / bagging) Finally, the product after the secondary drying is classified.

Here, the entire product is 500 to 4500
This is performed to make the range of μm. This is 50
Those having a particle diameter of 0 μm or less are powdery, so that they not only fly up due to the movement of the pet or adhere to pet hair and are scattered, but are powdery and absorb urine on the surface rather than absorbing urine. Was caused by the formation of a puddle.

Further, when the thickness is 4500 μm or more, the urine may fall to the bottom of the container earlier than the urine is absorbed due to the large gap. In addition, the removed product is a product that is supplied to the process of “sizing and granulating” again after the small product is warped and the large product is pulverized. Further, the products falling within the above range are packed in a bag and are ready for shipment. The product thus obtained is used as a product.

This product became a lump-like mass of 18 to 25 g when 10 ml (about 10 g) of urine was absorbed. Furthermore, the mass was not broken even if it was grabbed for removal. The water absorption at this time is 100 to
It is 125%. Also, the urine once absorbed was gradually released, so that the generation of odor could be reduced.

Further, when the mass is put in a fire as it is or after being dried, it can be incinerated as it is.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The characteristics of the present invention are as follows:
The point is that the deodorizing effect is improved by coating with bentonite and a thickener and further attaching phosphoric acid around the bentonite and the thickener. Therefore, the optimum range of phosphoric acid will be described below according to each embodiment. First, a first sample of a pet urine treating agent was manufactured by the following manufacturing method.

(Pulverization) First, wood flour is made. Sawdust having a water content of about 13% is crushed by a mortar type pulverizer so as to have an average particle diameter of 60 μm or less. (Mixing) Next, bentonite powder is mixed with the finely ground wood powder.

Here, 70% by weight of wood powder and 30% by weight of bentonite powder were charged into a ribbon-type mixer, and 1% by weight.
Mix for at least 0 minutes. The bentonite powder used here had a sodium content of 2.5% by weight or more, a water value of 10% or less, and a degree of swelling of about 25 ml / 2 g. (Granulation) Next, 60% by weight of water is added to the mixture of the wood powder and the bentonite powder, and primary granulation is performed by a granulator.

As the granulator used here, a granulator manufactured in-house was used. (Regulated granulation) The primary granulated small granules and bentonite powder in the previous step are put into a rotating disk at a weight ratio of 125: 15 excluding the water content, and kneading and grain growth are performed. It is done at the same time.

The granulator used here was a dedicated machine made by the company. (Primary drying) Next, the sized granules are dried at 180 ° for 5 minutes to reduce the water content to 10% or less. After drying in this way, classification is performed. Here, the drying is carried out in order to make the dried particles proceeding to the next step in the range of 500 to 4500 μm.

The dried particles removed are small ones as they are, and large ones are pulverized and then re-entered in the process of "regulated granulation". Here, tumbling granulation is performed while mixing 14 kg of phosphoric acid mixed water and 30 kg of mixed powder with 30 kg of dry granules.

Here, the mixed water of phosphoric acid is a mixture of water and phosphoric acid in a weight ratio of water: phosphoric acid = 100: 5.0. Therefore, in this case, 0.67 kg of phosphoric acid was added to 14 × 5.0 / 105.0 = 0.60 kg, which is the total weight of the dry granules and the mixed powder. At this time, phosphoric acid was added in an amount of 1.11% by weight based on the weight of the wood flour, bentonite, and thickener.

In the mixed powder used here, bentonite powder, a binder and a pigment are mixed in advance using a ribbon mixer or a drum mixer.
The mixing ratio at that time is set to be bentonite powder: binder: pigment = 100: 0.5: 0.35. Here, CMC was used as the binder. As the pigment, an iron oxide pigment was used.

The rolling granulator used here was a custom-made product manufactured by Okawara Seisakusho Co., Ltd. (Secondary Drying) Here, the tumbled granulated sieved granules were treated at a temperature of 1
The product is dried at a temperature of about 80 ° so as to have a water content of 5% or less to obtain a product.

(Flue / bagging) Finally, the product after the secondary drying is classified so that the product is in the range of 500 to 4500 μm. The result of the classification is a pet urine treating agent. Next, similarly, although the urine treating agent for pets was produced, the phosphoric acid concentration of the phosphoric acid mixed water added in the sizing step was changed.

More specifically, in sample 2, water: phosphoric acid = 100: 1.0. In sample 3, water: phosphoric acid = 100: 10.0. At this time, the ratio of phosphoric acid to the weight of the wood flour, bentonite, and thickener was 0.22% by weight in Sample 2, and 2.2% by weight in Sample 3. Sample 4 was prepared by simply adding the same amount of water without using phosphoric acid mixed water in the sizing step. And about each sample, the ash content, the lump strength, and the ammonia deodorization test were measured.

Here, the ash ratio is a ratio of non-burnable ones. Specifically, the ash content was burned in a muffle furnace at 800 ° C. for 3 hours, and the distribution amount was calculated from the weight ratio before and after the burning. Also, the smaller the ash content, the smaller the amount of embers, which is good for the environment. The lump strength is as follows. A sample is placed in a container, and 30 ml of 2% saline is applied at a constant speed. After one minute, the mass is taken out and a compressive load is applied by a tester. The value at the time when the mass at that time started to crack was shown. The measurement was performed five times for each sample, and the average value was shown. The higher this value is, the easier it is to handle the urine treatment agent that has absorbed and solidified the urine. Further, a numerical value of 250 gf or more is desirable.

In the ammonia deodorization test, a sample is placed in a 500 ml beaker, and 10 cc of 1% aqueous ammonia is sealed. After a lapse of 10 minutes, the residual ammonia gas concentration was measured with a gas detector tube. The measurement was performed three times for each sample, and the average value was shown. The results are shown in Table 1.

[0052]

[Table 1]

From the above results, the following can be said. Sample 1 has a slightly high ash content, but has a good deodorizing effect and a very high lump strength. Sample 2
Since the amount of phosphoric acid added is small, the deodorizing effect is low, but the lump strength is high. Here, the deodorization rate is 91.7%. Although there is a little less than 10% deodorization, if the amount of phosphoric acid added is less than this sample 2, it may not be possible to feel deodorization. Therefore, it is necessary to add phosphoric acid to this sample 2 or more. is there.

In Sample 3, the amount of phosphoric acid added was large, so that the deodorizing effect was large, but the strength was reduced by the addition of phosphoric acid. The lump strength here is 250 gf
Therefore, if the addition amount of phosphoric acid is further increased, the lump strength becomes too low, resulting in poor practicality. Therefore, the addition amount of phosphoric acid must be less than that of sample 3. It is.

The phosphoric acid was converted to water: phosphoric acid = 100:
When added at a ratio of 7.5, the lump strength was within a sufficiently practical range, the ammonia concentration was 35 ppm, and the deodorization rate was 71.2%. Next, the time characteristic of the deodorizing effect was measured using the sample 1.

The results are shown first. From FIG. 1, it can be seen that the ammonia yield at 40 ppm was 240 hours (1
0 day), 50 ppm in a temperature range of 5 ° C. to 60 ° C.
It is in the range of -70 ppm. This is 41.7 relative to the initial ammonia concentration without the addition of phosphoric acid.
% To 58.3%, which proved to be sufficiently practical. In this description, phosphoric acid is added in the sizing step.

However, for example, phosphoric acid can be added during granulation. By doing so, the relationship between the amount of phosphoric acid added and the lump strength was not much different from that of the above-described example, but the deodorization rate was slightly lowered. This seems to be the difference between the phosphoric acid adhering to the surface as in the above-described sample and the phosphoric acid being distributed inside by being added during granulation.

In addition, phosphoric acid can be added as a phosphoric acid compound when it is added to water.

[0059]

As described above, according to the present invention, phosphoric acid as a deodorizing material is applied to the area around wood flour and around the urine treatment material coated with bentonite and a thickener in an amount of 0.22 to 2.0. 2% by weight, and if necessary, by limiting the size of the wood flour as the starting material and the final product, to prevent urine odor, improve handling during use, and improve urinary This is to improve the absorbability.

[Brief description of the drawings]

FIG. 1 is a graph showing the aging characteristics of the deodorizing effect.

Claims (10)

[Claims] 1. A pet urine treatment material formed by adhering phosphoric acid in an amount of 0.22 to 2.2% by weight. 2. Bentonite and a thickening agent are coated around the wood flour, and phosphoric acid is further coated around the bentonite.
A urine treatment material for pets, wherein the urine treatment material is formed by adhering by weight%. 3. A pet urine-treating material characterized in that a bentonite layer and a mixed layer in which bentonite and a thickener are coated with water mixed with phosphoric acid are sequentially provided around the wood flour. . 4. Wood powder having an average particle size of 250 μm or less is used as the wood powder, and a mixture of this wood powder and bentonite powder is added with water, and granulated to 500 to 4500 μm.
A urine treatment material for pets, wherein phosphoric acid is further adhered to the periphery of the urine treatment material. 5. The pet urine treating material according to claim 4, wherein the wood flour is mainly composed of a powder having a size of 8 to 110 μm. 6. The pet urine treating material according to claim 4, wherein when mixing the wood flour and the bentonite flour, the amount of the wood flour is reduced to 60 to 80% by weight when the water content is removed. 7. The pet urine treating material according to claim 4, wherein the bentonite powder has an average particle size of 20 μm or less. 8. The pet urine-treating material according to claim 4, wherein the surface is coated with bentonite. 9. A method in which bentonite is coated with moisture around the wood flour, and after drying, bentonite and a thickener are further coated with water mixed with phosphoric acid, and then dried. A method for producing a pet urine treating material, characterized in that the amount is 0.22 to 2.2% by weight. 10. Wood flour having an average particle size of 250 μm or less,
Mixing with bentonite powder having an average particle size of 20 μm or less,
Thereafter, the mixture is granulated to 500 to 4500 μm while adding water, and then 0.22 to 2.2% by weight of phosphoric acid is further adhered to the periphery thereof, followed by drying, followed by drying. .