CN110384047B

CN110384047B - Cat litter containing bentonite and method for producing same

Info

Publication number: CN110384047B
Application number: CN201811092817.0A
Authority: CN
Inventors: 郑诚训
Original assignee: Individual
Current assignee: Zheng Chengxun
Priority date: 2018-04-16
Filing date: 2018-09-19
Publication date: 2021-10-15
Anticipated expiration: 2038-09-19
Also published as: CN110384047A; KR20190120531A; KR102042458B1

Abstract

The present invention relates to a cat litter containing bentonite and a method for producing the same. The manufacturing method of the present invention is characterized by including: a step of pulverizing the dried wood to produce amorphous cellulosic particles; a step of injecting a silica gel and the amorphous fibrous particles into a stirrer, and then spraying a binder and stirring the mixture; a step of charging granular bentonite pulverized into a predetermined particle size and stirring the same to fill the space between the silica gel and the amorphous fibrous particles with the granular bentonite; and transferring the mixture to an extruder to extrude the mixture into granules.

Description

Cat litter containing bentonite and method for producing same

Technical Field

The invention relates to cat litter, in particular to cat litter capable of absorbing and solidifying excrement and urine of domestic pet cats and being conveniently recycled and a manufacturing method thereof.

Background

The cat litter is a pet article for treating excrement and urine of pet cats, and recently, various forms of cat litter have been developed with a drastic increase in the number of pets.

As a raw material of the cat litter, various materials such as paper and bentonite are used.

Particularly, as for bentonite, the cost is low, the deodorization performance is outstanding, and the bentonite can be widely used as a raw material of cat litter.

However, conventional bentonite cat litter is not only agglomerated into large pieces but also insoluble in water when it is coagulated, and therefore cannot be disposed of in a toilet bowl, and it is necessary to dispose of it in a measuring garbage bag.

Further, the garbage bags are not discarded immediately after the garbage bags are charged and are generally discarded until the garbage bags are filled, which causes sanitary problems such as generation of bad smell during storage.

Documents of the prior art

Document 1, Korean patent office, patent application No. 10-1994- "

Document 2, Korean patent office, patent application No. 10-2016- "

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cat litter which is easily soluble in water and which uses bentonite as a main material.

In particular, there is provided bentonite cat litter having a property that when a small amount of water is added to a degree that the moisture can be sufficiently absorbed, adjacent bentonite litter particles coagulate with each other, and when a large amount of water is added, the particles are crushed and separated in a short time.

In order to achieve the above object of the present invention, a method for manufacturing cat litter containing bentonite of the present invention may comprise: a step of pulverizing the dried wood to produce amorphous cellulosic particles; a step of injecting a silica gel and the amorphous fibrous particles into a stirrer, and then spraying a binder and stirring the mixture; a step of charging granular bentonite pulverized into a predetermined particle size and stirring the same to fill the space between the silica gel and the amorphous fibrous particles with the granular bentonite; and transferring the mixture to an extruder to extrude the mixture into granules.

Wherein, after the step of extruding, the method further comprises the following steps: a step of rolling the extrusion product on the pulverized activated carbon particles after spraying the binder on the extrusion product; and drying in a drying furnace.

In another aspect, a cat litter comprising a bentonite clay of the invention comprises: a mixed layer formed by mixing granular bentonite pulverized to a predetermined particle size, amorphous cellulosic particles obtained by pulverizing wood, and silica gel at a predetermined ratio, and bonding them with a binder; and a plurality of activated carbon particles attached to an outer peripheral surface of the mixed layer, wherein at least a part of the amorphous fibrous particles has a shape extending in a longitudinal direction, and at least a part of the amorphous fibrous particles is in contact with an outside of the mixed layer and the colloidal silica.

Wherein at least one central hole is formed in the mixed layer along the longitudinal direction, and at least a part of the amorphous fibrous particles can contact with the inner wall of the central hole and the silica gel.

When water is supplied to the mixed layer, the supplied water is transferred to the silica gel through the granular bentonite and the fibrous particles, and the outer peripheral surface of the silica gel, which absorbs water, is ruptured as the silica gel swells, so that the mixed layer can be ruptured along the amorphous fibrous particles.

The cat litter containing the bentonite of the present invention and the method of manufacturing the same can be easily grasped and handled by dissolving the binder and easily sticking adjacent bentonite particles together when a small amount of water is added.

On the other hand, when the cat litter containing the bentonite of the present invention is put into water, the silica gel is broken and separated along the cellulose particles, and the granular parts other than the excrements are broken into pieces, thereby facilitating the throwing into a toilet bowl for flushing.

In addition, the cat litter has the effects of deodorizing and resisting bacteria by coating the surface of the cat litter with the activated carbon.

Drawings

FIG. 1 is a flow chart illustrating in sequence a method of making bentonite-containing cat litter of the present invention.

Fig. 2 is a diagram illustrating a manufacturing process of the litter shown in fig. 1.

Fig. 3 is a view showing a cross-sectional structure of the litter of the invention.

Fig. 4 is a view of the shape of a litter granulated and having a central hole formed therein along the length.

Fig. 5 is a schematic of the process of splitting when the litter particles of the invention are plunged into water.

Fig. 6 is a schematic view showing a process of splitting when the litter particle having a central hole formed therein of the present invention is thrown into water.

Reference numerals

110: cellulosic particles

120: silica gel

130: space part

140: bentonite clay

150: center hole

Detailed Description

The present invention will be described in detail below with reference to preferred embodiments thereof and the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the present invention or claims, when a certain component "includes" another component, unless otherwise stated, it should not be construed as being limited to the case where the component is composed of only the component, and it should be understood that the component may include another component.

Hereinafter, an example of the cat litter containing bean curd by-products and the method for producing the same will be described with reference to specific examples.

Fig. 1 is a flow chart sequentially illustrating a method for manufacturing cat litter containing bentonite 140 according to the present invention, and the first step is a step S11 of pulverizing dried wood to produce amorphous cellulosic particles 110, which is described with reference to fig. 1.

The dried wood is put into a wood pulverizer and pulverized to produce amorphous cellulosic particles 110.

The term "amorphous" means that the polymer does not have a specific shape, and particularly means non-granular.

The wood chips may be used, but it is preferable to perform impact pulverization to be split along the grain so as to have a shape extending in the length direction.

And, preferably, the length is 3mm to 10 mm.

The second step is a step S12 of pouring the silica gel 120 and the amorphous fibrous particles 110 into the mixer, and then spraying the binder to mix them.

In the above step S12, the colloidal silica 120 and the fibrous particles 110 are sparsely adhered together, and most of the colloidal silica 120 is in contact with a plurality of the fibrous particles 110.

Referring to fig. 2 (b), when the stirring step S12 is performed, the spherical colloidal silica 120 is bound between the fibrous particles 110 having a shape extending in the longitudinal direction, wherein the fibrous particles 110 are amorphous and have different shapes, and are formed to extend in the longitudinal direction, and a large number of space portions 130 are formed between the particles.

The third step is a step of charging and stirring granular bentonite 140 crushed to a predetermined particle size so as to fill the space between the silica gel 120 and the amorphous cellulosic particles 110 with the granular bentonite 140.

The bentonite 140 is a clay mainly containing montmorillonite which is a monoclinic mineral, and has the same crystal structure as mica. The bentonite is finely pulverized and granulated.

The crushed bentonite 140 is put into a mixer and mixed, and during the mixing, the granular bentonite 140 is filled into the space between the silica gel 120 and the cellulosic particles 110.

Fig. 2 (c) shows a shape in which the crushed granular bentonite is filled in the space 130 formed by the cellulosic particles 110.

The content of the bentonite 140 is preferably 50 to 70 wt% based on the total weight.

The remaining 30 to 50 wt% of the fibrous particles 110 and the colloidal silica 120 are preferably formed by mixing the fibrous particles 110 and the colloidal silica 120 in a ratio of 7: 3 to 8: 2 in a ratio of 2.

The fourth step is a step of filling the inside with the granular bentonite 140 sufficiently, transferring the granular bentonite to an extruder, and extruding the granular bentonite into granules.

In the third step, the materials are fully stirred and are in a paste shape through the viscosity of the binder.

And (3) putting the pasty mixture into an extruder, and extruding into granules.

Fig. 2 (d) is a view showing that the paste-like mixture is put into an extruder and extruded.

Referring to this figure, it was confirmed that colloidal silica 120 was dispersed around the fibrous particles 110, and the space 130 formed by the fibrous particles 110 was filled with bentonite 140.

At this time, a center hole 150 may be formed inside the middle portion of the extruded pellet, and fig. 4 is a schematic view of the shape of the cat litter formed into pellets and formed inside the center hole 150 in the length direction.

As shown in fig. 4, the above-mentioned center hole 150 serves to increase a contact area with water to rapidly absorb moisture, but it is a technique generally used in the industry, and in addition, it has an inherent feature of the present invention to minimize a distance of the colloidal silica 120 embedded inside the particles from water to shorten a time for which the particles are cracked when put into water.

After the pressing step S14, a step of spraying a binder on the pressed product and rolling it on the pulverized activated carbon particles may be further included.

Activated carbon is produced by a step of causing the surface of a carbide such as coal, coconut, nut shell, peat, soil carbon, wood, brown carbon, etc., which contains a large amount of carbon, to be corroded by an oxidation reaction of carbon occurring at a temperature of 800 to 1100 ℃, thereby developing the microporous structure of the carbide.

The purpose of activated carbon is generally the purification of liquids and gases. As examples, deodorizers of refrigerators, absorbents of air purifiers, filter nets of water purifiers, and filter papers are used for removing malodorous substances and coloring substances in air or water.

In the present invention, the activated carbon plays a role in removing offensive odor of excrement in the process of treating the excrement of the pet cat in the cat litter of the present invention.

Thereafter, a step of drying the above-mentioned extrusion product in a drying oven may be further included.

The extrusion is sufficiently dried, and after sufficient voids are formed inside, compression-packed to avoid breakage during circulation, and then shipped.

On the other hand, the cat litter including the bentonite 140 manufactured according to the process of the present invention has all the colloidal silica 120 in contact with the fibrous particles 110 in terms of process characteristics.

That is, a plurality of fibrous particles 110 are overlapped and connected to the silica gel 120, which can be seen from fig. 3 showing a cross section of the cat litter extruded in a pellet shape.

Since the granular bentonite 140 is compressed after being filled between the fibrous particles 110 and the colloidal silica 120, when water is put in, the water is transferred to the colloidal silica 120 by the water absorption of the fibrous particles 110.

The silica gel 120 absorbs moisture, cracks are generated from the outer portion that absorbs moisture, small cracks are formed in the interior of the pellet, and the pellet is broken along the fibrous particles 110, so that the cat litter is decomposed.

The process of absorbing moisture can be described in two cases: 1) a condition of absorbing cat urine and 2) a condition of throwing into a toilet.

1) Absorption of urine from cats

Urine from the cat is absorbed by the adjacent particles, and at this time, urine is absorbed by the bentonite 140 particles and the cellulose, and a part of urine is absorbed by the silica gel 120.

On the other hand, when the binder on the surface of the granules absorbs moisture, the starch recovers its viscosity, and the adjacent granules are agglomerated by the viscosity.

However, the moisture is completely absorbed by the inner sufficient space and the silica gel 120 to maintain a dry state, and the moisture-absorbed particles are agglomerated by the adhesive.

2) In case of throwing into a toilet

The situation is different when thrown into a toilet.

Fig. 5 is a diagram showing a process of splitting when the litter pellets of the invention are thrown into water.

Referring to this figure, when the toilet is thrown into the toilet, a large amount of water that cannot be sufficiently contained in the voids inside the granules comes into contact with the water, and the water is supplied directly to the silica gel 120 mainly along the path formed by the fibrous particles 110.

In particular, the cellulosic particles 110 are suitable as a moisture transfer path because the wood is crushed along the grain in the cellulosic particle 110 preparation step S11.

Therefore, once water is supplied, water is transferred to the surface of the silica gel 120 along the fibrous particles 110.

At this time, cracks are generated on the outside of the silica gel 120 as a large amount of moisture is instantaneously absorbed. In effect, as the "snap" cracking sound is emitted, the outer portion of the silicone gel 120 cracks.

Then, cracks on the surface of the produced colloidal silica 120 progress to the fibrous particles 110, and the particles are cracked centering on the fibrous particles 110.

On the other hand, when the binder is dissolved in water, the bonding state between the cellulose and the bentonite 140 and the colloidal silica 120 is loosened, and at this time, cracks on the surface of the colloidal silica 120 progress along the fibrous particles 110, and the cracks are broken as shown in fig. 5, thereby decomposing the cat litter pellets in the toilet.

On the other hand, as another modification, a center hole 150 may be formed inside the particle.

Specifically, one or more central holes 150 are formed in the inner portion along the longitudinal direction, and at least a part of the fibrous particles 110 are in contact with the inner wall of the central hole 150 and the silica gel 120.

Fig. 6 shows a process in which the litter pellets forming the center hole 150 of the present invention are cracked when thrown into water, and it is explained with reference to this figure that once the center hole 150 is formed, the distance between the inner wall of the center hole 150 and the silicone rubber 120 becomes short.

Therefore, the time from the time when water is put in to the time when the cracks on the surface of the silica gel 120 start to occur can be shortened.

Meanwhile, since the area in contact with water increases, the amount of water transferred to the silica gel 120 in the same time increases.

Thus, when the litter is placed in water, the particles immediately break apart and rapidly disintegrate.

The technical idea of the present invention is explained above by means of several embodiments.

Various modifications and alterations of the embodiments of the present invention will be apparent to those skilled in the art from the disclosure of the invention. Although not explicitly shown or described, the description of the present invention may be modified to include various modifications of the technical idea of the present invention, and still fall within the scope of the right of the present invention. The above-described embodiments explained with reference to the drawings are described for the purpose of explaining the present invention, and the scope of the right of the present invention is not limited to these embodiments.

Claims

1. A method for producing a bentonite-containing cat litter, comprising:

a step (a) of pulverizing dried wood to produce amorphous cellulosic particles (110);

a step (b) of putting silica gel (120) and the amorphous fibrous particles (110) into a stirrer, spraying a binder, and then stirring;

a step (c) of adding and stirring granular bentonite (140) which has been pulverized into a predetermined particle size;

step (d), transferring the product in the step (c) to an extruder, and extruding the product into granules;

a step (e) of rolling the extrusion product produced in the step (d) on pulverized activated carbon particles after spraying starch thereon; and

a step (f) of drying the product of the step (e) in a drying oven,

in the step (a), the wood is impact-pulverized to be split along the grain so as to have a shape extending in the length direction,

in step (b), the amorphous cellulosic particles (110) and the silica gel (120) are mixed in a ratio of 7: 3 to 8: 2 is added in a proportion of 2 percent,

in the step (c), the bentonite (140) is added in an amount of 50 to 70 wt% based on the total weight,

the extruded product produced in the step (d) has a structure in which colloidal silica (120) is dispersed around the amorphous cellulosic particles (110), and bentonite (140) is filled in the space (130) formed by the amorphous cellulosic particles (110),

the extrusion product produced in the step (d) is formed with more than one central hole (150) along the length direction,

the activated carbon used in the step (e) is produced by a step of forming a microporous structure of carbide by eroding the surface of carbide by oxidation reaction of carbon occurring at a temperature of 800 to 1100 ℃,

when the product of the step (e) is brought into contact with moisture of excrement, the adjacent particles are agglomerated by the viscosity of starch on the surfaces of the particles, and when a large amount of moisture is transferred to the colloidal silica (120), cracks are generated in the colloidal silica (120), and the generated cracks are developed to the amorphous fibrous particles (110), thereby breaking the particles.

2. A bentonite-containing cat litter produced by the method for producing bentonite-containing cat litter according to claim 1, comprising:

a mixed layer formed by mixing granular bentonite (140) having a predetermined particle size, amorphous cellulosic particles (110) obtained by crushing wood, and silica gel (120) at a predetermined ratio, and bonding the mixture using a binder; and

a plurality of activated carbon particles attached to an outer peripheral surface of the mixed layer,

wherein at least a part of the amorphous cellulosic particles (110) have a shape extending along a length direction,

at least a portion of the amorphous cellulosic particles (110) are in contact with the exterior of the intermixed layer and the colloidal silica (120),

at least one center hole (150) is formed in the mixed layer along the longitudinal direction,

at least a portion of the amorphous cellulosic particles (110) are in contact with the inner wall of the central bore (150) and the silica gel (120).