JP6510883B2 - Water absorption treatment material and method for producing the same - Google Patents

Description

  The present invention relates to a water-absorbent material that absorbs human or animal excrement and other liquids, and a method for producing the same.

  As a conventional water absorption treatment material, there is, for example, one described in Patent Document 1. The same document describes an excrement treating material for animals, which is a kind of water absorption treating material. The excrement treating material is composed of particulates that absorb animal urine. The granular material is provided with a core (granulated material) formed by extrusion granulation and a covering part covering the core.

Japanese Patent Application Publication No. 2007-190026

  The waste disposal material is used as laid in a toilet for animals and absorbs urine excreted by animals. Therefore, if the waste disposal material after absorption is discarded or the like, urine can be disposed of together. Thus, by absorbing the liquid in the water absorption treatment material, the treatment of the liquid becomes easy. However, the conventional water absorption treatment material has room for improvement in terms of water absorption speed.

  This invention is made in view of the said subject, and it aims at providing the water absorption processing material excellent in water absorption speed, and its manufacturing method.

  The water absorption treatment material according to the present invention is a water absorption treatment material comprising a granular material that absorbs a liquid, and the granular material is provided with a granulated material having a recess on the surface, which is formed by extrusion granulation, and the granular material The invention is characterized in that a depression corresponding to the recess is present on the surface of the.

  In the water absorption treated material, a recess is provided on the surface of the granulated material constituting the granular material. And the hollow corresponding to the said recessed part exists in the surface of a granular material. In this case, a granular material having a large surface area is obtained as compared to the case where no recess exists. As a result, the contact area of the particles with respect to the liquid is increased, so that the water absorption speed can be improved.

  Further, the method for producing a water absorption treated material according to the present invention is a method for producing a water absorption treated material composed of particles that absorb liquid, and it is preferable to And including the granulate forming step of forming the granulated material constituting the granular body by extrusion granulation, and forming the concave portion corresponding to the recess on the surface of the granulated matter. And a step of

  In this manufacturing method, a recess is formed on the surface of the granulated material constituting the granular material. And a granular object is formed so that a hollow may arise on the surface. That is, the hollow corresponding to the above-mentioned crevice exists in the surface of the granular object formed. In this case, a granular material having a large surface area is obtained as compared to the case where no recess exists. As a result, the contact area of the particles with respect to the liquid is increased, so that the water absorption speed can be improved.

  According to the present invention, a water absorption treated material excellent in water absorption speed and a method for producing the same are realized.

It is a perspective view which shows 1st Embodiment of the water absorption processing material by this invention. It is sectional drawing along the II-II line of FIG. It is a top view for demonstrating the method to form the recessed part 12a shown in FIG. It is an end elevation for demonstrating the method to form the recessed part 12a shown in FIG. It is a top view for demonstrating the method to form the recessed part 12a shown in FIG. It is an end elevation for demonstrating the method to form the recessed part 12a shown in FIG. It is a perspective view which shows 2nd Embodiment of the water absorption treatment material by this invention. It is sectional drawing along the VIII-VIII line of FIG. It is a perspective view for demonstrating the method to form the recessed part 12b shown in FIG. It is a top view for demonstrating the method to form the recessed part 12b shown in FIG. It is a perspective view showing a water absorption processing material concerning a modification. It is an end elevation along the XII-XII line of FIG. It is an end elevation for demonstrating the method to form the recessed part 12c shown in FIG. It is a top view for demonstrating the method to form the recessed part 12c shown in FIG. It is an end elevation for demonstrating the method to form the recessed part 12c shown in FIG. It is a top view for demonstrating the method to form the recessed part 12c shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description.
First Embodiment

  FIG. 1 is a perspective view showing a first embodiment of a water absorption treatment material according to the present invention. 2 is a cross-sectional view taken along the line II-II of FIG. The water absorption treatment material 1 is composed of a granular body 10 that absorbs a liquid. The water absorption treatment material 1 is, for example, an excrement treatment material for companion animals such as cats and dogs.

  A recess 10 a is present on the surface of the granular body 10. In the present embodiment, a plurality of (specifically, two) recesses 10a are provided. The granular body 10 has a substantially cylindrical shape, and the depression 10 a is present on the side surface of the granular body 10. That is, the depressions 10 a are present only on the side surface of the surface (consisting of the side surface and the two bottom surfaces) of the granular material 10.

  The recess 10 a is in the form of a groove. The recess 10 a extends in the circumferential direction of the granular material 10. In particular, in the present embodiment, the recess 10 a extends in the entire circumferential direction of the granular material 10. Thereby, the granular material 10 has a constricted shape.

  As shown in FIG. 2, the granular material 10 includes a core 12 (granulated material) and a covering 14. The core 12 is formed in a granular form. The core portion 12 is formed by extrusion granulation as described later. The core portion 12 contains a water absorbing material, and has a function of absorbing and retaining liquid such as excrement. As the water-absorbent material, for example, papers, tea shells, plastics or okara can be used. Such a water absorbent material is preferably the main material of the core 12. Here, the main material of the core portion 12 refers to the material constituting the core portion 12 that has the largest weight ratio in the core portion 12.

  Papers refer to materials mainly composed of pulp. Examples of paper include, in addition to ordinary paper, polyvinyl chloride wallpaper classification (paper obtained by classifying polyvinyl chloride wallpaper), fluff pulp, papermaking sludge, pulp sludge and the like. As plastics, you may use a disposable diaper classification (plastic obtained by classifying a disposable diaper), for example. Okara is preferably dried Okara.

  A recess 12 a is formed on the surface of the core 12. In the present embodiment, a plurality of (specifically, two) recesses 12 a are provided. The core 12 has a substantially cylindrical shape, and the recess 12 a is present on the side surface of the core 12. That is, the recess 12 a is present only on the side surface of the surface (consisting of the side surface and the two bottom surfaces) of the core 12.

  The recess 12a has a groove shape. The recess 12 a extends in the circumferential direction of the core 12. In particular, in the present embodiment, the recess 12 a extends in the entire circumferential direction of the core 12. Thus, the core 12 has a constricted shape.

  A covering portion 14 is provided to cover the surface of the core portion 12. The covering portion 14 covers the entire surface of the core portion 12. The portion of the surface of the covering portion 14 (the surface of the granular material 10) located on the recess 12a is recessed. That is, the above-mentioned dent 10a exists in the portion concerned. Thus, the recess 10 a of the granular material 10 corresponds to the recess 12 a of the core 12.

  The covering portion 14 contains an adhesive material, and has a function of adhering the water absorption treated materials 1 that have absorbed the liquid during use. As the adhesive material, for example, a water absorbing polymer, starch, CMC (carboxymethylcellulose), PVA (polyvinyl alcohol) or dextrin can be used. The covering portion 14 contains a water absorbing material in addition to the adhesive material.

  Subsequently, an example of a method of manufacturing the water absorption treated material 1 will be described as a first embodiment of the method of manufacturing the water absorption treated material according to the present invention. This manufacturing method includes a granular material forming step. The particulate matter forming step is a step of forming the particulate matter 10 so that the depressions 10a are formed on the surface, and includes a granulation step, a concave portion forming step and a coating step.

  A granulation process is a process of forming core part 12 which constitutes granular object 10 by extrusion granulation. In this process, after the material (core part material) which comprises the core part 12 is shredded with a crusher etc., it injects into a mixer and mixes. Then, after adding water as required, the core material is extruded and granulated. In the present embodiment, a substantially cylindrical core 12 is formed.

  The recess forming step is a step of forming the recess 12 a on the surface of the core 12. In this process, the recess 12 a is formed on the side surface of the core 12. In the present embodiment, a groove-shaped recess 12 a extending in the entire circumferential direction of the core 12 is formed. The recess 12 a can be formed, for example, by tightening and pressing a part of the side surface of the core 12.

  For this pressing, for example, the devices shown in FIGS. 3 to 6 can be used. FIG. 4 is an end view taken along line IV-IV of FIG. 6 is an end view taken along the line VI-VI of FIG. This device has four pressing members 20. These pressing members 20 are arranged radially. The tip of each pressing member 20 has an arc shape in plan view. The arc corresponds to a part of a circumference having a smaller diameter than the core 12 to be pressed, and has a length of 1⁄4 of the circumference. Each pressing member 20 is configured to be able to reciprocate along the radial direction of the core 12 (the direction indicated by the arrow in the drawing).

  FIG. 3 and FIG. 4 show the state when the pressing member 20 is the farthest from the central axis of the core 12. At this time, the tip end portion of the pressing member 20 is separated from the side surface of the core portion 12. On the other hand, FIGS. 5 and 6 show a state where the pressing member 20 is closest to the central axis of the core 12. At this time, the tip end portions of the four pressing members 20 form one circle in a state of being bited into the side surface of the core portion 12. Thus, a groove-shaped recess 12 a extending in the entire circumferential direction of the core 12 is formed.

  The covering step is a step of forming a covering portion 14 that covers the surface of the core portion 12. In this step, a coating device or the like is used to attach the material (coating material) constituting the coating portion 14 to the entire surface of the core 12. The application of the coating material can be carried out, for example, by spraying or spraying. At this time, the covering portion 14 is formed such that a portion of the surface of the covering portion 14 located on the recess 12 a is recessed. For example, by spreading the coating material uniformly on the surface of the core portion 12, it is possible to form the coating portion 14 having a recess corresponding to the recess 12a.

  Thereafter, the water absorption treated material thus obtained is sieved to extract only the water absorption treated material that satisfies the predetermined standard. Then, the extracted water absorbing material is dried by a dryer. Water absorption processing material 1 is obtained by the above.

  The effects of this embodiment will be described. In the present embodiment, the recess 12 a is formed on the surface of the granulated material 12 constituting the granular material 10. And the granular material 10 is formed so that the hollow 10a may be produced on the surface. That is, on the surface of the granular material 10, a recess 10a corresponding to the recess 12a is present. In this case, the granular material 10 having a large surface area is obtained as compared with the case where the depression 10a does not exist. As a result, the contact area of the granular material 10 with respect to the liquid is increased, so that the water absorption speed can be improved. Therefore, the water absorption treatment material 1 excellent in water absorption speed and a method of manufacturing the same are realized.

  Moreover, according to the water absorption treated material 1 having such a configuration, even if a large amount of liquid is received at one time, it is possible to temporarily hold the liquid which can not be absorbed immediately in the depression 10a. The liquid held in the recess 10 a is gradually absorbed by the water absorption treatment material 1. As described above, since the water absorption treated material 1 can absorb the liquid which can not be absorbed immediately without escape, it is excellent not only in the water absorption speed but also in the water absorption amount.

  The granular body 10 has a substantially cylindrical shape, and the depression 10 a is present on the side surface of the granular body 10. In the granular material 10 of such a shape, the liquid is mainly absorbed from the side. Therefore, providing the depressions 10 a on the side surface is particularly effective for improving the water absorption speed of the water absorption treated material 1.

  While forming the substantially cylindrical core part 12 in a granulation process, the recessed part 12a is formed in the side of the core part 12 in a recessed part formation process. Thereby, the granular material 10 which has the hollow 10a in the side can be obtained easily.

  The recess 10 a is in the form of a groove. Such a shape is suitable for providing the depression 10 a in a wide area of the granular material 10. Providing the depressions 10 a in a wide range is advantageous in increasing the surface area of the granular material 10 and improving the water absorption speed of the water absorption treated material 1.

  In the recess forming step, the groove-shaped recess 12 a is formed. Thereby, the groove-like depression 10a can be easily obtained.

  The recess 10 a extends in the circumferential direction of the granular material 10. The depression 10 a having such a configuration can be obtained by tightening a part of the side surface of the core 12 after granulation. Therefore, the granulation step and the recess formation step can be performed independently of each other. Therefore, the granulation process can be performed without using a special device or method.

  In particular, in the present embodiment, the recess 10 a extends in the entire circumferential direction of the granular material 10. Thereby, even when the liquid is received from any direction of the side surface of the granular material 10, the effect of improving the water absorption speed by the depression 10a can be sufficiently achieved.

  On the surface of the granular material 10, a plurality of depressions 10a are provided. As a result, the surface area of the granular material 10 is increased as compared with the case where only one depression 10 a is provided, and the water absorption speed of the water absorption treated material 1 can be further improved.

In the recess formation step, a plurality of recesses 12 a are formed on the surface of the core 12. Thereby, the granular material 10 which has the several hollow 10a can be obtained easily.
Second Embodiment

  FIG. 7 is a perspective view showing a second embodiment of the water absorbing treatment material according to the present invention. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. The water absorption processing material 2 consists of the granular material 10 which absorbs a liquid.

  A recess 10 b is present on the surface of the granular body 10. In the present embodiment, a plurality of (specifically, six) depressions 10b are provided. The granular body 10 has a substantially cylindrical shape, and the depression 10 b is present on the side surface of the granular body 10. The recess 10 b is in the form of a groove. The recess 10 b extends in the longitudinal direction of the granular body 10. In particular, in the present embodiment, the recess 10 b extends over the entire length of the granular body 10.

  As shown in FIG. 8, the granular body 10 includes a core 12 and a covering 14. A recess 12 b is formed on the surface of the core 12. In the present embodiment, a plurality of (specifically, six) recesses 12 b are provided. The core 12 has a substantially cylindrical shape, and the recess 12 b is present on the side surface of the core 12. The recess 12 b has a groove shape. The recess 12 b extends in the longitudinal direction of the core 12. In particular, in the present embodiment, the recess 12 b extends over the entire length of the core 12.

  A covering portion 14 is provided to cover the surface of the core portion 12. The covering portion 14 covers the entire surface of the core portion 12. The portion of the surface of the covering portion 14 (the surface of the granular material 10) located on the recess 12b is recessed. That is, the above-mentioned hollow 10b exists in the said part. Thus, the recess 10 b of the granular material 10 corresponds to the recess 12 b of the core 12. The other configurations of the core portion 12 and the covering portion 14 are as described in the first embodiment.

  Subsequently, an example of a method of manufacturing the water absorption treated material 2 will be described as a second embodiment of the method of manufacturing the water absorption treated material according to the present invention. This manufacturing method includes a granular material forming step. The particulate matter forming step is a step of forming the particulate matter 10 so that the depressions 10b are formed on the surface, and includes a granulation step, a concave portion forming step and a coating step.

  In the present embodiment, the granulation process and the recess formation process are performed simultaneously. That is, formation of the recessed part 12b is performed at the time of extrusion granulation.

  FIG. 9 and FIG. 10 are a perspective view and a plan view showing a part of a die used for extrusion granulation in the present embodiment, respectively. The die 30 has a through hole 40. Although a plurality of through holes 40 are actually formed in one die 30, only one through hole 40 is shown here. A convex portion 42 is provided on the inner surface of the through hole 40.

  The convex portion 42 is for forming the concave portion 12 b. Therefore, the shape, size, and position of the convex portion 42 are set such that the concave portion 12 b having the above-described configuration is formed. In the present embodiment, the protrusion 42 is a protrusion extending in the thickness direction of the die 30. In addition, a plurality of (specifically, six) convex portions 42 are provided. The convex portions 42 are regularly arranged on the inner surface of the through hole 40. Specifically, six convex portions 42 are disposed at equal intervals in the circumferential direction of the through hole 40.

  In the granulation step, the core material is pressed against the die 30. Thereby, when passing through the through hole 40, the core material is granulated. At this time, a groove (concave portion 12 b) corresponding to the convex portion 42 is formed in a portion in contact with the convex portion 42 in the core portion material. By cutting the granulated material extruded from the through hole 40 into a predetermined length, the core 12 having the recess 12 b is obtained.

  The covering step is a step of forming a covering portion 14 that covers the surface of the core portion 12. In this step, the coating material is attached to the entire surface of the core 12 using a coating device or the like. At this time, the covering portion 14 is formed such that a portion of the surface of the covering portion 14 located on the recess 12 b is recessed.

  Thereafter, the water absorption treated material thus obtained is sieved to extract only the water absorption treated material that satisfies the predetermined standard. Then, the extracted water absorbing material is dried by a dryer. Water absorption processing material 2 is obtained by the above.

  The effects of this embodiment will be described. In the present embodiment, the recess 12 b is formed on the surface of the granulated material 12 constituting the granular material 10. And the granular material 10 is formed so that the hollow 10b may be produced on the surface. That is, on the surface of the granular material 10, a recess 10b corresponding to the recess 12b is present. In this case, the granular material 10 having a large surface area is obtained as compared with the case where the depression 10 b is not present. As a result, the contact area of the granular material 10 with respect to the liquid is increased, so that the water absorption speed can be improved. Therefore, the water absorption treated material 2 excellent in water absorption speed and a method of manufacturing the same are realized.

  The recess 10 b extends in the longitudinal direction of the granular body 10. The depression 10 b having such a configuration can be obtained by forming the recess 12 b on the surface of the core 12 at the time of granulation. Therefore, since the recess formation step can be performed simultaneously with the granulation step, the granular material 10 having the depression 10 b can be obtained while avoiding an increase in the number of manufacturing steps. The other effects of the present embodiment are as described in the first embodiment.

  The present invention is not limited to the above embodiment, and various modifications are possible. In the said embodiment, the case where the hollow (hollow 10a, 10b) and the recessed part (concave part 12a, 12b) were carrying out the groove shape was illustrated. However, as shown in FIGS. 11 and 12, the depressions and the depressions may be spot-shaped in plan view. FIG. 12 shows an end face along line XII-XII in FIG. In these figures, a spot-like depression 10 c is provided on the surface of the granular material 10, and a spot-like depression 12 c is provided on the surface of the core 12.

  The spot-like concave portion 12c can be formed, for example, using a die 30 having the following configuration. That is, as shown in FIGS. 13 to 16, a rod-like member 46 is provided in the through hole 40 of the die 30. The rod-like member 46 is configured to be able to reciprocate along the radial direction of the through hole 40 (the direction indicated by the arrow in FIGS. 13 and 15). FIGS. 13 and 14 show the rod member 46 as it approaches the central axis of the through hole 40 the most. At this time, the tip of the rod-like member 46 is located between the inner surface of the through hole 40 and the central axis of the through hole 40. That is, the rod-like member 46 is in a state of protruding from the inner surface of the through hole 40. On the other hand, FIG. 15 and FIG. 16 show a state where the rod-like member 46 is farthest from the central axis of the through hole 40. At this time, the tip of the rod-like member 46 is located on the inner surface of the through hole 40.

  When the core material passes through the through hole 40 at the time of extrusion granulation, the rod-like member 46 is intermittently protruded from the inner surface of the through hole 40, whereby the spot-like concave portion 12c shown in FIG. 12 can be formed. . Note that such a reciprocated rod member 46 may be provided not on the inside of the die 30 but on the outside of the die 30.

  In the said embodiment, the example in which the several hollow was provided in the surface of the granular material 10 was shown. However, only one depression may be provided. The same applies to the recess provided on the surface of the core 12.

  In the said embodiment, the substantially cylindrical granular object 10 was illustrated. However, the shape of the granular body 10 may be granular, and may be a sphere or an ellipsoid. The same applies to the shape of the core 12.

  In the said embodiment, the case where the granular material 10 has a multilayer structure which consists of the core part 12 and the coating | coated part 14 was illustrated. However, providing the covering portion 14 is not essential. That is, the granular material 10 may have a single-layer structure consisting of only the core portion 12. In that case, although the recessed part provided in the core part 12 turns into a hollow of the granular material 10 as it is, such a hollow is also contained in "a hollow corresponding to a concave."

DESCRIPTION OF SYMBOLS 1 water absorption processing material 2 water absorption processing material 10 granular material 10a hollow 10b hollow 10c hollow 12 core part (granulate)
12a Recess 12b Recess 12c Recess 14 Covering Part 20 Pressing Member 30 Dice 40 Through Hole 42 Convex Part 46 Bar Member

Claims (9)

A method for producing a water-absorbent material comprising particles that absorb liquid, comprising:
Including a particle forming step of forming the particles so as to form a depression on the surface,
The above-mentioned granular material formation process,
A granulation step of forming a granulated material constituting the granular material by extrusion granulation;
A recess forming step of forming a recess corresponding to the recess on the surface of the granulated material after the granulation step ;
A method of manufacturing a water absorption treated material, comprising: In the method of manufacturing a water absorption treatment material according to claim 1 ,
In the said granulation process, the manufacturing method of the water absorption processing material which forms the said substantially cylindrical granulated material. In the manufacturing method of the water absorption processing material according to claim 2 ,
In the said recessed part formation process, the manufacturing method of the water absorption process material which forms the said recessed part in the side surface of the said granulated material. In the manufacturing method of the water absorption processing material according to claim 3 ,
In the said recessed part formation process, the manufacturing method of the water absorption process material which forms the said grooved recessed part. In the method of manufacturing a water absorption treatment material according to claim 4 ,
The manufacturing method of the water absorption processing material which forms the said recessed part so that it may extend in the circumferential direction of the said granulated material in the said recessed part formation process. In the method of manufacturing a water absorption treatment material according to claim 5 ,
The manufacturing method of a water absorption processing material which forms the crevice so that it may extend to the whole peripheral direction of the granulated matter in the crevice formation process. In the method of manufacturing a water absorption treatment material according to claim 4 ,
The manufacturing method of the water absorption processing material which forms the said recessed part so that it may extend in the length direction of the said granulated material in the said recessed part formation process. In the method of manufacturing a water absorption treatment material according to claim 7 ,
The manufacturing method of the water absorption processing material which forms the crevice so that it may extend to the whole of the length direction of the granulate in the crevice formation process. In the method of manufacturing a water absorption treated material according to any one of claims 1 to 8 ,
In the said recessed part formation process, the manufacturing method of the water absorption processing material which forms several said recessed parts in the said surface of the said granulated material.

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